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Molding apparatus

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20140151929 patent thumbnailZoom

Molding apparatus


An in-mold shutter (140) for embedding in an injection mold (100, 200, 300) is described herein. The in-mold shutter (140, 240, 340, 440, 540) includes a shutter actuator (148, 548) that is configured to selectively engage a first mold shoe (130) of the injection mold (100, 200, 300) with a platen of a mold clamping assembly (996) to hold the first mold shoe (130) in an extended position (E), along a mold-stroke axis (X), during a step of molding a first molded article (102A) in the injection mold (100, 200, 300). Also described herein is a molded article transfer device (150, 250) for use with the injection mold (100, 200, 300). The molded article transfer device (150, 250) includes a shuttle (154) that is slidably arranged, in use, within the injection mold (100, 200, 300). The shuttle (154) defines a first aperture (156A), at least in part, that alternately accommodates: (i) a first mold stack (106A, 206A, 306A) arranged therein; and (ii) a first molded article (102A) received therein with opening of the first mold stack (106A, 206A, 306A).
Related Terms: Elective Embedding

Browse recent Husky Injection Molding Systems Ltd. patents - Bolton, CA
USPTO Applicaton #: #20140151929 - Class: 2643281 (USPTO) -
Plastic And Nonmetallic Article Shaping Or Treating: Processes > Mechanical Shaping Or Molding To Form Or Reform Shaped Article >Shaping Against Forming Surface (e.g., Casting, Die Shaping, Etc.) >Applying Heat Or Pressure >Introducing Material Under Pressure Into A Closed Mold Cavity (e.g., Injection Molding, Etc.)



Inventors: Christophe Halter, Pierre Glaesener, François Styga

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The Patent Description & Claims data below is from USPTO Patent Application 20140151929, Molding apparatus.

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. patent application Ser. No. 13/202,799 filed Aug. 23, 2011, which is a U.S. National Stage entry of PCT/CA2010-001799, filed 17 Nov. 2010, which claims priority from U.S. Provisional patent applications 61/264,881 and 61/264,883 both filed 30 Nov. 2009, the disclosures of which are incorporated herein by reference thereto.

TECHNICAL FIELD

The non-limiting embodiments disclosed herein generally relate to a molding apparatus, and more particularly to an in-mold shutter and a molded article transfer device for use with an injection mold, and a controller with which to execute related molding processes.

BACKGROUND

U.S. Pat. No. 7,351,050 to Vanderploeg et al., published on Apr. 1, 2008 teaches a servo side shuttle apparatus and method for a molding machine includes structure and/or steps whereby a shuttle plate is disposed adjacent at least one of a first mold half and a second mold half of the molding machine. A guidance assembly is coupled to the mold half and guides the shuttle plate linearly across a molding face of the mold half. A drive mechanism is provided to drive the shuttle plate in a linear direction. An operation structure is coupled to the shuttle plate and is configured to perform an operation on a molded article disposed either in the mold cavity or on the mold core. The operation may include removing the molded article from a mold core, applying a label to a mold cavity, and/or closing the lid of a molded article while it is resident on the mold core.

U.S. Pat. No. 5,037,597 to McGinley et al., published on Aug. 6, 1991 teaches an injection molding apparatus and process for forming a plurality of first parts and a plurality of complementary second parts during a single molding cycle has a system for removing parts molded during each cycle and for assembling the parts into finished articles. The system includes a plurality of rotatable suction cups for removing the parts and for aligning them with and inserting them into a series of loading ports in a central mold member so as to mate respective ones of the first parts with respective ones of the second parts. The central mold member further has internal chute assemblies for conveying assembled articles away from the mold. A novel system for driving the rotatable suction cups uses a rotatable member mounted to various mold halves and a camming arrangement whereby relative movement of the mold halves during the mold closing and opening motions causes rotation of the suction cups.

U.S. Pat. No. 4,589,840 to Schad, published on May 20, 1986 teaches an apparatus for continuously receiving and collecting molded articles from a continuously cycling injection molding machine where the articles are collected sequentially and continuously in a uniform physical position or orientation.

U.S. Pat. No. 6,939,504 to Homann et al., published on Sep. 6, 2005 teaches a method and system for producing hollow rib structures for trim components and panels using gas assisted injection molding. Movable insert members are provided in the mold cavity, particularly at the ends of the structural rib members. After the plastic material is injected into the mold cavity, the plastic is packed in the mold, and the insert members are locked in position. Selectively activatable locking mechanisms are used to lock up the insert members. Thereafter, gas or another fluid is introduced into the rib members in order to provide hollow channels therein. Movement of the insert members provides a recess or groove for placement of the displaced resin from the rib members. The displaced resin material completes the formation of the molded plastic article.

U.S. Pat. No. 3,982,869 to Eggers, published on Sep. 28, 1976 teaches a multiple mold assembly is disclosed for molding articles in an injection molding apparatus. The assembly includes two molding sections that are alternatively shuttled from positions wherein one of the molding sections is in position for a molding operation, and the other molding section is in position for loading of inserts, performing preparatory or finishing operations, or removal of molded articles, to the reverse positions. The shuttle assembly of this invention is particularly adapted for use in a horizontal injection molding apparatus and for insert molding.

U.S. Pat. No. 4,981,634 to Maus et al., published on Jan. 1, 1991 teaches an injection molding process creates a micro clean room environment inside a mold cavity which can stay closed to airborne contaminants while ejecting and transferring the molded part out. The molded part is formed and solidified at a parting line plane within the mold cavity, then is carried rearward on the movable mold insert to a second plane where it is stripped off and transferred out through a discharge aperture which is open when the mold cavity is in the second plane but closed off when in the first plane. The aperture faces substantially downward to prevent entry by upwelling thermal air currents. External supplied filtered gas can provide positive pressure through vents within the moldset's internal space. This maximizes mold and part cleanliness while speeding up “mold-open” cycle; may eliminate HEPA filters/enclosures and robots. Optical disks, lenses, food packaging and medical parts are suggested uses.

U.S. Pat. No. 4,950,152 to Brun, published on Aug. 21, 1990 teaches a plurality of injection cores are inserted by a movable platen into corresponding injection cavities defined by mold inserts within a stationary platen, and the cores extend through corresponding split transfer mold cavities. After hollow preforms with threaded neck portions are molded within the cavities, the preforms are removed from the mold cavities, separated from the injection cores, and then shifted transversely by the split transfer molds to cooling or blow cavities defined by blow cavity inserts within the stationary platen on opposite sides of the corresponding injection cavities. The transfer molds return to receive the injection cores, and corresponding blow core units are inserted into the preforms within the blow cavities for pressurizing and expanding the preforms into firm contact with the blow inserts. The preforms are removed from the blow cavities by the blow cores on alternate cycles of press operation and are then released by retraction of the blow cores. The split transfer molds are shifted transversely in opposite directions and are opened and closed by a cam system which includes cam tracks mounted on the movable platen and incorporating cam track switches.

SUMMARY

According to a first aspect described herein, there is provided a molded article transfer device for use with an injection mold. The molded article transfer device includes a shuttle that is slidably arranged, in use, within the injection mold, the shuttle defining a first aperture, at least in part, that alternately accommodates: (i) a first mold stack arranged therein; and (ii) a first molded article received therein with opening of the first mold stack to retract it from the first aperture. The first molded article is transferable, in use, within the first aperture with shuttling movement of the shuttle.

According to a second aspect described herein, there is provided an injection mold that includes a first mold half, a second mold half , a molded article transfer device, and an in-mold shutter. The first mold half includes a first mold shoe with a first stack portion of a first mold stack connected thereto. The second mold half includes a second mold shoe with a second stack portion of the first mold stack connected thereto. The in-mold shutter being configured to position, in use, the first stack portion and the second stack portion relative to each other, along a mold-stroke axis, to close and open a molding cavity that is defined therebetween for molding and ejecting, respectively, a first molded article. The molded article transfer device being configured to receive and transfer the first molded article with opening of the molding cavity.

According to a third aspect described herein, there is provided a controller including instructions being embodied in a controller-usable memory of the controller, the instructions for directing the controller to execute a molding process. The molding process includes: (i) closing a first mold stack of an injection mold to define a molding cavity therein, wherein the first mold stack is arranged within a first aperture that is defined by a shuttle of a molded article transfer device; (ii) molding a first molded article within the molding cavity; (iii) opening the first mold stack to retract it from the first aperture; (iv) arranging the first mold stack to eject the first molded article into the first aperture of the shuttle; and (v) shuttling of the shuttle to transfer the first molded article within the first aperture.

According to a fourth aspect described herein, there is provided an in-mold shutter for embedding in an injection mold. The in-mold shutter includes a shutter actuator that is configured to selectively engage a first mold shoe of an injection mold with a platen of a mold clamping assembly to hold the first mold shoe in an extended position, along a mold-stroke axis, during a step of molding a first molded article in the injection mold.

According to a fifth aspect described herein, there is provided an in-mold shutter for embedding in an injection mold. The in-mold shutter includes a shutter member that is associated, in use, with one of a platen of a mold clamping assembly and a first mold shoe of the injection mold. The in-mold shutter also includes a link member that is associated with a remaining one of the platen and the first mold shoe. The shutter member and the link member are configured to be selectively engageable, in use, to hold the first mold shoe in an extended position, along a mold-stroke axis, during a step of molding a first molded article in the injection mold.

According to a sixth aspect described herein, there is provided a controller including instructions being embodied in a controller-usable memory of the controller, the instructions for directing the controller to execute a molding process. The molding process includes: (i) closing a first mold stack of an injection mold to define a molding cavity therein; (ii) shuttering an in-mold shutter to engage a first mold shoe of the injection mold with one of a to moving platen and a stationary platen of a injection molding system; (iii) molding a first molded article within the molding cavity; (iv) un-shuttering the in-mold shutter to disengage the first mold shoe from the one of the moving platen and the stationary platen; and (v) selectively positioning the first mold shoe, along a mold-stroke axis.

These and other aspects and features will now become apparent to those skilled in the art upon review of the following description of specific non-limiting embodiments in conjunction with the accompanying drawings.

DETAILED DESCRIPTION

OF THE DRAWINGS

The detailed description of illustrative (non-limiting) embodiments will be more fully appreciated when taken in conjunction with the accompanying drawings, in which:

FIG. 1 depicts a schematic representation of an injection molding system having a non-limiting embodiment of an injection mold arranged therein;

FIG. 2A depicts a perspective view of a portion of a first mold half of the injection mold of FIG. 1 and of portions of non-limiting embodiments of a molded article transfer device and of an in-mold shutter that are associated therewith;

FIG. 2B depicts a perspective view of a portion of a second mold half of the injection mold of FIG. 1 and of a further portion of the molded article transfer device of FIG. 2A that is associated therewith;

FIG. 3 depicts another perspective view of the portion of the molded article transfer device of FIG. 2A;

FIG. 4 depicts a further perspective view of the portion of the molded article transfer device of FIG. 2A in a partially assembled state;

FIGS. 5A-5D depict a start-up molding process involving the injection mold, the molded article transfer device, and the in-mold shutter of FIG. 2A, wherein the injection mold, the molded article transfer device, and the in-mold shutter are each shown in section as taken along line A-A identified in FIGS. 2A and 2B;

FIGS. 5E-5K depict a production molding process involving the injection mold, the molded article transfer device, and the in-mold shutter of FIG. 2A;

FIGS. 6A-6G depict an alternative production molding process involving an alternative non-limiting embodiment of the injection mold, and the molded article transfer device and the in-mold shutter of FIG. 2A;

FIGS. 7A-7F depict another alternative production molding process involving the injection mold and the in-mold part transfer device of FIG. 6A, and that does not involve the in-mold shutter of FIG. 2A;

FIGS. 8A-8G depict an alternative production molding process involving an alternative non-limiting embodiment of the injection mold, an alternative non-limiting embodiment of the molded article transfer device, and the in-mold shutter of FIG. 2A;

FIG. 9 depicts a flow chart of a first aspect of the production molding process;

FIG. 10 depicts a flow chart of a second aspect of the production molding process;

FIG. 11A and 11B, 12A and 12B, and 13A and 13B depict various alternative non-limiting embodiments of an in-mold shutter in a shut position and an open position, respectively;

FIG. 14 depicts yet another alternative non-limiting embodiment of an in-mold shutter in a shut position.

The drawings are not necessarily to scale and may be illustrated by phantom lines, diagrammatic representations and fragmentary views. In certain instances, details that are not necessary for an understanding of the embodiments or that render other details difficult to perceive may have been omitted.

DETAILED DESCRIPTION

OF THE NON-LIMITING EMBODIMENT(S)

FIG. 1 depicts a schematic representation of an injection molding system 900 with a non-limiting embodiment of an injection mold 100 arranged therein. The injection mold 100 is operable to mold a first molded article 102 (FIG. 2A) such as, for example, a container closure.

In the description of the injection molding system 900 and the injection mold 100 that follows many of the components thereof are known to persons skilled in the art, and as such these known components will not be described in detail herein. A detailed description of these known components may be referenced, at least in part, in the following reference books (for example): (i) “Injection Molding Handbook” authored by OSSWALD/TURNG/GRAMANN (ISBN: 3-446-21669-2), (ii) “Injection Molding Handbook” authored by ROSATO AND ROSATO (ISBN: 0-412-10581-3), (iii) “Injection Molding Systems” 3rd Edition authored by JOHANNABER (ISBN 3-446-17733-7) and/or (iv) “Runner and Gating Design Handbook” authored by BEAUMONT (ISBN 1-446-22672-9).

The injection molding system 900 shown in FIG. 1 is shown to include, but is not limited to, a mold clamping assembly 996 and an injection assembly 997.

By way of example, the mold clamping assembly 996 described hereafter is representative of a typical three-platen variety although no such specific limitation on the generality of the construction and/or operation thereof is intended. As such the mold clamping assembly 996 may have a different construction, such as, for example, one having only two-platens. That being said, the non-limiting embodiment of the mold clamping assembly 996 includes, amongst other things, a moving platen 912, a stationary platen 914, a clamp block 913, and a tie bar 916. The tie bar 916 links the stationary platen 914 with the clamp block 913, and moreover slidably supports the moving platen 912 thereon. While for the sake of simplicity of depiction only one tie bar 916 is shown, it is typical to provide four such tie bars 916, one extending between each of the four corners of the moving platen 912, the stationary platen 914, and the clamp block 913. The mold clamping assembly 996 also includes a platen-moving actuator 915 (such as, for example, a hydraulic actuator, a pneumatic actuator, an electro-mechanical actuator, or the like) that is connected between the moving platen 912 and the clamp block 913. The platen-moving actuator 915 is operable, in use, to move the moving platen 912 with respect to the stationary platen 914 and thus move a first mold half 96 with respect to a second mold half 98 that are mounted thereto, respectively. The mold clamping assembly 996 further includes a clamp actuator 918 and a clamp shutter 920 in association with the clamp block 913. The clamp shutter 920 is operable, in use, to selectively connect the clamp actuator 918 with the moving platen 912 for sake of a clamping together of the first mold half 96 and the second mold half 98. Lastly, the mold clamping assembly 996 may also include an ejector actuator 922 (such as, for example, a hydraulic actuator, a pneumatic actuator, an electro-mechanical actuator, or the like) that is associated with the moving platen 912. The ejector actuator 922 is connectable to a structure that is associated with the first mold half 96. The structure of the first mold half 96 is driven, in use, with actuation of the ejector actuator 922, whereby an operation is performed, such as, for example, ejecting the first molded article 102 from the first mold half 96.

By way of example, the injection assembly 997 described hereafter is representative of a typical reciprocating screw variety although no specific limitation on the generality of a construction and/or operation thereof is intended. As such the injection assembly 997 may have a different construction, such as, for example, one having separate plasticizing and injection means (i.e. so-called two stage variety). The injection assembly 997 is operable to melt and inject a molding material, such as, for example, Polyethylene or Polyethylene-terephthalate (PET) through a machine nozzle (not shown) and into a melt distribution apparatus 190 (e.g. hot runner, cold runner, insulated runner, or the like) that is associated with the second mold half 98. The melt distribution apparatus 190 in turn directs the molding material into one or more molding cavity 101 (FIG. 5A) that are defined within the injection mold 100 with the first mold half 96 and the second mold half 98 being closed and clamped together.

The first mold half 96 of the injection mold 100 is further shown as including an in-mold shutter 140, a molded article transfer device 150, and a first mold shoe 130 arranged therebetween. A detailed description of the structure and operation of the foregoing will follow. Broadly speaking, the in-mold shutter 140 is operable to selectively engage, in use, the first mold shoe 130 (FIG. 2A) of the first mold half 96 to one of the moving platen 912 and the stationary platen 914 of the mold clamping assembly 996, whereby the injection mold 100 may be opened or closed substantially without having to move the moving platen 912 relative to the stationary platen 914 (although such movement is not precluded). For its part, the first mold shoe 130 is structured to have a first stack portion 110 (FIG. 5A) of a first mold stack 106A connected thereto. Lastly, the molded article transfer device 150 is operable to transfer the first molded article 102A (FIG. 2A) that is received from the first mold stack 106A.

A detailed construction of the non-limiting embodiment of the injection mold 100 may be appreciated with further reference to FIGS. 2A, 2B, 3, and 5A. As previously mentioned, and as best shown in FIG. 5A, the first stack portion 110 of the first mold stack 106A is shown connected to the first mold shoe 130 of the first mold half 96. Also shown is a second stack portion 120 of the first mold stack 106A that is connected to a second mold shoe 131 of the second mold half 98. The first stack portion 110 and the second stack portion 120 are positioned, in use, relative to each other, along a mold-stroke axis X of the injection mold 100, to close and open a molding cavity 101 that is defined therebetween for molding and ejecting, respectively, the first molded article 102A (FIG. 2A) therein.

The first stack portion 110 of the first mold stack 106A includes an inner core 112, an outer core 114, and a stripper sleeve 116 that cooperate, in use, with a cavity insert 122 of the second stack portion 120 to define the molding cavity 101.

The outer core 114 is slidably arranged around the inner core 112 to accommodate, in use, relative movement thereof along the mold-stroke axis X, a technical effect of which may include, for example, the release of a seal portion 103 (FIG. 5D) of the first molded article 102A. Likewise, the stripper sleeve 116 is slidably arranged around the outer core 114 to accommodate, in use, the relative movement thereof along the mold-stroke axis X, a technical effect of which may include, for example, the stripping of the first molded article 102A from the outer core 114.

As previously mentioned, the foregoing members of the first stack portion 110 are connected to the first mold shoe 130. Now, in more detail, the first mold shoe 130 includes a first core retainer 132 and a stripper retainer 136 that are slidably connected together to accommodate the relative movement thereof, in use, along the mold-stroke axis X, wherein the inner core 112 is connected to the first core retainer 132, and the stripper sleeve 116 is retained with the stripper retainer 136. As such, the stripper sleeve 116 is movable, in use, along the mold-stroke axis X, relative to the inner core 112, and to the outer core 114, albeit once the outer core 114 has reached its limit of travel with respect to the inner core 112, between a stripper sleeve molding position (FIG. 5A) and an ejection position (FIG. 5D), with relative movement between the first core retainer 132 and the stripper retainer 136.

Of note, the inner core 112 is shown to be connected to the first core retainer 132 in a fluid tight manner to isolate a coolant circuit that is defined therein. The coolant channel is defined between a coolant dispenser 193 and a space that is defined within the inner core 112 within which the coolant dispenser 193 is arranged. An end portion of the coolant dispenser 193 is connected to the first core retainer 132 and is otherwise arranged to direct coolant, in use, between a coolant inlet conduit 191 and a coolant outlet conduit 194 that are defined in the first core retainer 132. In operation, a coolant, such as water, is circulated through the coolant channel to remove heat from the inner core 112, and any of the other members of the first mold stack 106A that are thermally connected therewith, whereby the first molded article 102A may be rapidly cooled to ensure a faster molding cycle.

In this arrangement, the stripper sleeve 116 is fixedly arranged in a passageway 137 that is defined in the stripper retainer 136. More particularly, the stripper retainer 136 includes a base plate 133, an intermediate plate 134, and a top plate 135 that are fastened together, in use, with the passageway 137 being defined therethrough, wherein a flange portion 123 of the stripper sleeve 116 is retained between the intermediate plate 134 and the top plate 135. The outer core 114 is slidably arranged within the passageway 137 to accommodate relative movement between the outer core 114 and the stripper sleeve 116, along the mold-stroke axis X, with the movement of the outer core 114, from an outer core molding position (FIG. 5A) to a stripping position (FIG. 5D).

As previously alluded to, the outer core 114 and the inner core 112 are slidably retained together to limit, in use, the relative movement thereof, in use, along the mold-stroke axis X. For example, the inner core 112 may be structured to define a bayonet 113 and the outer core 114, 214, 314 structured to define a bayonet pocket 117, wherein the bayonet 113 and the bayonet pocket 117 are configured to cooperate, when rotatably engaged, to slidably retain the outer core 114 about the inner core 112. In operation the inner core 112 and the outer core 114 are kept rotatably engaged by a key 119 that is associated with the stripper retainer 136. The key 119 is fixedly arranged between the base plate 133 and the intermediate plate 134 with a portion thereof extending into the passageway 137 with which to cooperate with the outer core 114 to maintain an angular orientation thereof with respect to the inner core 112.

The first stack portion 110 further includes a resilient member 115 that is arranged between the inner core 112 and the outer core 114, and wherein the resilient member 115 is arranged to bias the outer core 114 towards a forward limit of travel with respect to the stripper sleeve 116 that corresponds with their relative arrangement during the molding of the first molded article 102A-as shown in FIG. 5A. The forward limit of travel of the outer core 114 with respect to the stripper sleeve 116 is provided through cooperation of a shoulder 121 that is defined on the outer core 114 and a step 139 that is defined in the passageway 137 across a bottom of the flange portion 123 of the stripper sleeve 116.

As previously mentioned, the injection mold 100 further includes the in-mold shutter 140 that is associated with the first mold half 96. As best shown with reference to FIG. 5A, the in-mold shutter 140 broadly includes a shutter member 144 and a link member 146. As shown, the shutter member 144 is associated with the moving platen 912 of the mold clamping assembly 996, and the link member 146 is associated with the first mold shoe 130. In operation, the shutter member 144 is alternately selectively positioned, in use, in: i) an open position U, and ii) a shut position S. As such, the in-mold shutter 140 further includes a shutter actuator 148 that is connected to the shutter member 144, the shutter actuator 148 being operable, in use, to drive the movement of the shutter member 144 between the open position U and the shut position S. With the shutter member 144 arranged in the shut position S, as shown in FIG. 5A, the shutter member 144 is engaged with the link member 146, whereby the first mold shoe 130 is engaged with the moving platen 912. With the shutter member 144 arranged in the open position U, as shown in FIG. 5B or 5F, the shutter member 144 is disengaged from the link member 146, whereby the first mold shoe 130 may be moved, in use, along the mold-stroke axis X. The movement of the first mold shoe 130, along the mold-stroke axis X, may be driven, for example, by the ejector actuator 922 of the mold clamping assembly 996. The foregoing is schematically shown with reference to FIG. 5B, wherein the ejector actuator 922 is shown to be connected to the first core retainer 132.

The in-mold shutter 140 further includes a support base 142 upon which the shutter member 144 is slidably coupled, and wherein the support base 142 is structured to be fixedly connected, in use, by a fastener 192, or the like, to the moving platen 912. Furthermore, the link member 146 is connected to a back face of the first core retainer 132 of the first mold shoe 130. In this arrangement, the link member 146 is aligned with the first stack portion 110 of the first mold stack 106A. Likewise, where the injection mold 100 includes a plurality of mold stacks, included in which is the first mold stack 106A, with which to define a plurality molding cavities to mold, in use, a plurality of molded articles, such as that shown with reference to FIGS. 2A and 2B, the in-mold shutter 140 may further include a plurality of link members, included in which is the link member 146, wherein each of the plurality of link members is aligned with one of the plurality of mold stacks. That being said, no such specific limitation as to the number and arrangement of the link members is intended.

The shutter member 144 further defines a first clearance aperture 145 that is configured to accommodate the link member 146 being arranged therein, in use, with the shutter member 144 being positioned in the open position U (FIG. 5B or 5F) and with the movement of the first mold shoe 130, along the mold-stroke axis X, towards a retracted position B (FIG. 5D or 5I). Depending on the required stroke of the first mold shoe 130, the first clearance aperture 145 may be structured to extend, as shown, through the shutter member 144. Furthermore, the support base 142 may also define a second clearance aperture 143 that is aligned, in use, with the first clearance aperture 145, with positioning of the shutter member 144 into the open position U. As such, the second clearance aperture 143 is configured to accommodate the link member 146 being arranged therein, in use, with the shutter member 144 being positioned in the open position U and with the movement of the first mold shoe 130, along the mold-stroke axis X, towards the retracted position B, as shown in FIGS. 5D or 5I.

The shape and size of the link member 146 in relation to those of the first clearance aperture 145 and the second clearance aperture 143 is not particularly limited so long as the link member 146 is arrangeable therethrough. In the present non-limiting example, the link member 146 has a cylindrical body, and wherein the first clearance aperture 145 and the second clearance aperture 143 are provided as complementary cylindrical bores.

As mentioned previously, the first core retainer 132 and the stripper retainer 136 are slidably connected together to accommodate the relative movement thereof, in use, along the mold-stroke axis X. Furthermore, the first core retainer 132 and the stripper retainer 136 are also slidably connected to the in-mold shutter 140. As such, and as shown with reference to FIG. 5A, the in-mold shutter 140 further includes a guide member 141 with which to guide the members of the first mold shoe 130 along the mold-stroke axis X. More particularly, the guide member 141 may include one or more leader pins, or the like, that are fixed to the support base 142, wherein the guide member 141 is slidably received within a bushing 149 that is arranged in each of the first core retainer 132 and the stripper retainer 136.

Various other alternative non-limiting embodiments of the injection mold 100 including the in-mold shutter 140 are contemplated, although not shown. For example, the in-mold shutter 140 may be associated with the second mold half 98 instead of the first mold half 96, and as such cooperates, in use, with the stationary platen 914 (FIG. 1). As a further example, the association of the shutter member 144 and the link member 146 may be interchanged, wherein the shutter member 144 is associated with the first mold shoe 130, and the link member 146 is associated with the moving platen 912. More generally, within the various other alternative non-limiting embodiments of the injection mold 100 one of the shutter member 144 and the link member 146 is associated, in use, with one of the moving platen 912 and the stationary platen 914 of the injection molding system 900, and wherein a remaining one of the shutter member 144 and the link member 146 is associated, in use, with the first mold shoe 130.

As previously mentioned, the injection mold 100 also includes the molded article transfer device 150. As shown with reference to FIGS. 2A, 2B, 3, 4, and 5A, the molded article transfer device 150 broadly includes a shuttle 154 that is slidably arranged, in use, within the injection mold 100. The shuttle 154 defining a first aperture 156A, at least in part, that alternately accommodates: i) the first mold stack 106A arranged therein, as shown in FIG. 5A; and ii) the first molded article 102A received therein, as shown in FIG. 5I, wherein the first molded article 102A being transferable, in use, within the first aperture 156A with shuttling movement of the shuttle 154.

More particularly, the shuttle 154 is slidably arranged between the first mold shoe 130 and the second mold shoe 131 of the injection mold 100 to accommodate the shuttling movement therebetween, in use, along a shuttling axis Y (FIG. 3) that is generally perpendicular to the mold-stroke axis X (FIG. 5A). As shown with reference to FIG. 5A, the first aperture 156A is configured to accommodate, when positioned in a first receiving position R, the first stack portion 110 of the first mold stack 106A being retractably arranged therein during molding, in use, of the first molded article 102A (FIG. 5B). As shown with reference to FIG. 5I, the first aperture 156A is further configured to receive, while still positioned in the first receiving position R, the first molded article 102A therein with retraction of the first stack portion 110 therefrom and with ejection thereof from the first stack portion 110. Thereafter, the first molded article 102A is transferred, in use, within the first aperture 156A, with the shuttling movement of the shuttle 154 from the first receiving position R to a first transfer position T (FIG. 3). To provide for the shuttling movements of the shuttle 154 the molded article transfer device 150 is further provided with a shuttle actuator 168 that is connected to the shuttle 154, the shuttle actuator 168 being operable, in use, to drive the shuttling movement of the shuttle 154.

In this arrangement the shuttle 154 is slidably arranged to accommodate the shuttling movement thereof with the first mold half 96 and the second mold half 98 of the injection mold 100 being positioned in a mold closed configuration C (FIG. 5A). That is, the first mold half 96 and the second mold half 98 of the injection mold 100 need not be rearranged into a mold open configuration O (FIG. 5B) in order to accommodate the shuttling movement of the shuttle 154. As such, the molded article transfer device 150 further includes a base plate 170 upon which the shuttle 154 is slidably connected for the shuttling movement thereof, in use, along the shuttling axis Y. The base plate 170 is associated, as shown in FIG. 5A, with the first mold half 96 of the injection mold 100. The manner in which the shuttle 154 is slidably connected to the base plate 170 is not particularly limited. For example, in the present non-limiting embodiment the shuttle 154 is slidably connected to a face of the base plate 170 using a linear bearing arrangement. More particularly, for ease of manufacture, service, and assembly, the shuttle 154 may be provided as a plurality of interconnected shuttle modules 155, as shown with reference to FIG. 2A, each of which is connected to a bearing block 172, as shown with reference to FIG. 4, that is in turn slidably connected to a linear race 174 that is mounted to the base plate 170.

As previously mentioned, the base plate 170 is associated, as shown in FIG. 5A, with the first mold half 96 of the injection mold 100. As such, the in-mold shutter 140 is further provided with an ejector box 147 with which to frame the first mold shoe 130 and otherwise couple, in use, the base plate 170 of the molded article transfer device 150 with the moving platen 912 of the injection molding system 900. More particularly, a fastener 192 connects the base plate 170 to a top of the ejector box 147 and another fastener 192 connects the support base 142 of the in-mold shutter 140 to a bottom of the ejector box 147, recalling that the support base 142 is fixedly connected, in use, by a fastener 192, or the like, to the moving platen 912. Furthermore, the ejector box 147 defines a space 151 within which the first mold shoe 130 may be moved, in use, along the mold-stroke axis X, to provide for positioning of the members of the mold stacks. As previously mentioned, the movement of the first mold shoe 130, along the mold-stroke axis X, may be driven, at least in part, by the ejector actuator 922 of the mold clamping assembly 996. More particularly, the ejector actuator 922 is shown to be connected to the first core retainer 132 for a repositioning thereof. Furthermore, and as shown in FIG. 5B, the injection mold 100 further includes a stripper actuator 153 with which to connect the molded article transfer device 150 with the stripper retainer 136, the stripper actuator 153 being operable, in use, to drive the relative movement of the stripper retainer 136 along the mold-stroke axis X.

As shown with reference to FIG. 2B and 5A, the molded article transfer device 150 further includes a first barricade 158A that is associated the second mold half 98. The first barricade 158A is configured to cooperate with the shuttle 154, as shown in FIG. 5A, to further define the first aperture 156A when positioned in the first receiving position R.

Returning to the description of the non-limiting embodiment, and with reference to FIG. 2A, it is shown that the shuttle 154 further defines a first channel 160A. The first channel 160A and the first barricade 158A are configured to cooperate, in use, to define the first aperture 156A with the first barricade 158A being positioned, by the shuttling movement of the shuttle 154, within the first channel 160A. The foregoing arrangement is not clearly shown in the figures but may otherwise be appreciated with reference to FIG. 3 wherein a second channel 160B and the first barricade 158A are configured to cooperate to define a second aperture 156B with the first barricade 158A being positioned within the second channel 160B. With positioning, in use, of the first channel 160A into the first receiving position R, as shown in FIG. 2A, by the shuttling movement of the shuttle 154, the first channel 160A is positioned to accommodate the first stack portion 110, 210, 310 being retractably arranged therein during molding of the first molded article 102A.

With reference to FIG. 3, it may be appreciated that the first channel 160A is further configured to accommodate the first molded article 102A passing therealong, towards an exit 164 thereof, with positioning, in use, of the first channel 160A into the first transfer position T, by the shuttling movement of the shuttle 154, wherein the first channel 160A is positioned beside the first stack portion 110, 210, 310 and the first barricade 158A.

As previously mentioned, the shuttle 154 further defines a second channel 160B. The second channel 160B is adjacent to, and generally parallel with, the first channel 160A, wherein with one of the first channel 160A and the second channel 160B being positioned in the first receiving position R a remaining one of the first channel 160A and the second channel 160B is positioned in the first transfer position T. The foregoing arrangement may be appreciated by contrasting FIGS. 2A and 3, wherein the shuttle 154 has undergone a shuttling movement, and that in FIG. 2A the first channel 160A is registered in the first receiving position R and the second channel 160B is in the first transfer position T, whereas in FIG. 3 the situation is reversed in that the first channel 160A is in the first transfer position T and the second channel 160B is in the first receiving position R.

As shown in FIG. 3, the second channel 160B and the first barricade 158A are configured to cooperate, in use, to define the second aperture 156B with the first barricade 158A being positioned within the second channel 160B, with positioning, in use, of the second channel 160B into the first receiving position R, by the shuttling movement of the shuttle 154, wherein the second channel 160B is positioned to accommodate the first stack portion 110 being retractably arranged therein during molding of another of the first molded article 102A. Likewise, the second channel 160B is further configured to accommodate the another of the first molded article 102A passing therealong, not shown, towards the exit thereof, with positioning, in use, of the second channel 160B into the first transfer position T, as shown in FIG. 2A, by the shuttling movement of the shuttle 154, wherein the second channel 160B is positioned beside the first stack portion 110 and the first barricade 158A.

As may be appreciated with reference to FIGS. 2A and 3, the first channel 160A and the second channel 160B each include a straight portion within which the first aperture 156A and the second aperture 156B are defined, respectively. As such, the first channel 160A and the second channel 160B are defined between cooperating pairs of guide bars 162 that are associated with the shuttle 154. The pairs of guide bars 162 define gaps 166 therein through which the first barricade 158A is slid, in use, with relative movement of the shuttle 154 with respect to the first barricade 158A.

As may be appreciated with reference to FIG. 2A, the injection mold 100 includes several columns of mold stacks with which to simultaneously mold a plurality of molded articles. Of note, while the portion of the second mold half 98 shown in FIG. 2A depicts only the second stack portion 120 of the first mold stack 106A, the second mold half 98 would, in its entirety, further include other second stack portions, not shown, with which to cooperate with the other mold stacks.

As shown with reference to FIGS. 2A and 3, the columns of mold stacks includes a first column of mold stacks, within which is the first mold stack 106A with which to mold the first molded article 102A and a second mold stack 106B with which to mold a second molded article 102B. The molded article transfer device 150 further comprises a second barricade 158B that is associated with the second mold half 98. The first channel 160A and the second barricade 158B are configured to cooperate, in use, to define a third aperture 156C with the second barricade 158B being positioned within the first channel 160A, with positioning, in use, of the first channel 160A into the first receiving position R, by the shuttling movement of the shuttle 154, wherein the first channel 160A is positioned to accommodate the first stack portion 110 of the second mold stack 106B being retractably arranged therein during molding of the second molded article 102B. As shown with reference to FIG. 3, the first channel 160A is further configured to accommodate the second molded article 102B passing therealong, towards the exit 164 thereof, with positioning, in use, of the first channel 160A into the first transfer position T, by the shuttling movement of the shuttle 154, wherein the first channel 160A is positioned beside the first column of mold stacks, the first barricade 158A and the second barricade 158B. Likewise, as shown again with reference to FIG. 3, the second channel 160B and the second barricade 158B are configured to cooperate, in use, to define a fourth aperture 156D with the second barricade 158B being positioned within the second channel 160B, with positioning, in use, of the second channel 160B into the first receiving position R, by the shuttling movement of the shuttle 154, wherein the second channel 160B is positioned to accommodate the first stack portion 110 of the second mold stack 106B being retractably arranged therein during molding of another of the second molded article 102B (not shown). As shown with reference to FIG. 3, the second channel 160B is further configured to accommodate the another of the second molded article 102B (not shown) passing therealong, not shown, towards the exit 164 thereof, with positioning, in use, of the second channel 160B into the first transfer position T, by the shuttling movement of the shuttle 154, wherein the second channel 160B is positioned beside the first stack portion 110, 210, 310 of the first column of mold stacks, the first barricade 158A and the second barricade 158B.

Also shown with reference to FIGS. 2A and 3 is that the columns of mold stacks also includes a second column of mold stacks having a third mold stack 106C with which to mold a third molded article 102C and a fourth mold stack 106D with which to mold a fourth molded article 102D. As such, the molded article transfer device 150 further includes a third barricade 158C and a fourth barricade 158D that are associated with the second mold half 98. Furthermore, the shuttle 154 further defines a third channel 160C and a fourth channel 160D that are adjacent to, and generally parallel with, the first channel 160A and the second channel 160B, wherein with one of the third channel 160C and the fourth channel 160D being positioned in a second receiving position R′ a remaining one of the third channel 160C and the fourth channel 160D is positioned in a second transfer position T′. As shown in FIG. 2A, the third channel 160C and the third barricade 158C are configured to cooperate, in use, to define a fifth aperture 156E with the third barricade 158C being positioned within the third channel 160C, with positioning, in use, of the third channel 160C into the second receiving position R′, by the shuttling movement of the shuttle 154, wherein the third channel 160C is positioned to accommodate the first stack portion 110 of the third mold stack 106C being retractably arranged therein during molding of the third molded article 102C. Likewise, and as shown in FIG. 3, the fourth channel 160D and the third barricade 158C are configured to cooperate, in use, to define a sixth aperture 156F with the third barricade 158C being positioned within the fourth channel 160D, with positioning, in use, of the fourth channel 160D into the second receiving position R′, by the shuttling movement of the shuttle 154, wherein the fourth channel 160D is positioned to accommodate the first stack portion 110, 210, 310 of the third mold stack 106C being retractably arranged therein during molding of another of the third molded article 102C (not shown).

Likewise, and as shown in FIG. 2A, the third channel 160C and the fourth barricade 158D are configured to cooperate, in use, to define a seventh aperture 156G with the fourth barricade 158D being positioned within the third channel 160C, with positioning, in use, of the third channel 160C into the second receiving position R′, by the shuttling movement of the shuttle 154, wherein the third channel 160C is positioned to accommodate the first stack portion 110, 210, 310 of the fourth mold stack 106D being retractably arranged therein during molding of the fourth molded article 102D. Lastly, and as shown in FIG. 3, the fourth channel 160D and the fourth barricade 158D are configured to cooperate, in use, to define an eighth aperture 156H with the fourth barricade 158D being positioned within the fourth channel 160D, with positioning, in use, of the fourth channel 160D into the second receiving position R′, by the shuttling movement of the shuttle 154, wherein the fourth channel 160D is positioned to accommodate the first stack portion 110, 210, 310 of the fourth mold stack 106D being retractably arranged therein during molding of another of the fourth molded article 102D (not shown). Furthermore, the third channel 160C and the fourth channel 160D are further configured to accommodate the third molded article 102C and the fourth molded article 102D, and alternately the another of the third molded article 102C and the another of the fourth molded article 102D, respectively, passing therealong, towards the exit 164 thereof, with sequential arranging, in use, of the third channel 160C and the fourth channel 160D into the second transfer position T′, by the shuttling movement of the shuttle 154, wherein the third channel 160C and the fourth channel 160D are positioned beside the second column of mold stacks, the third barricade 158C and the fourth barricade 158D.

Thus, having just described the non-limiting embodiment of the injection mold 100, and prior to discussing the detailed operation of the foregoing, it is worth noting that a simple reconfiguration of the foregoing is possible, albeit not shown, wherein the base plate 170 is associated with the second mold half 98 of the injection mold 100, and as such the first barricade 158A, and the like, would instead be associated the first mold half 96.

The operation of the foregoing non-limiting embodiment of the injection mold 100 will now be described with reference to a start-up molding process, as shown in FIGS. 5A through 5D, and thereafter a production molding process, as shown in FIGS. 5E through 5J. Where reference is made to the operation of the first mold stack 106A the same operation applies to the remaining mold stacks in the injection mold 100 even though not specifically mentioned.

As the name implies, the start-up molding process would typically be executed, although not exclusively, when starting the injection mold 100. As generally known, the start-up of an injection mold often requires manual intervention by a molding system operator to clear short-shots (i.e. molded articles that are only partially molded), to remove molded articles that stubbornly resist ejection (e.g. typically due to an over cooling thereof), or to remove flash (i.e. molding material that has seeped outside of the molding cavity 101), and the like. Thus, during start-up it may be necessary to position the first mold half 96 and the second mold half 98, along the mold-stroke axis X, into the mold open configuration O, as shown in FIG. 5B, with relative repositioning of the moving platen 912 and the stationary platen 914, to provide ready access to each of the first stack portion 110 and the second stack portion 120.

The start-up molding process begins, as shown in FIG. 5A, with the injection mold 100 being positioned in the mold closed configuration C with the first mold shoe 130 being positioned, along the mold-stroke axis X, in an extended position E such that the first mold stack 106A is closed to define the molding cavity 101 therein. Furthermore, the shutter member 144 of the in-mold shutter 140 is in the shut position S, whereby the first mold shoe 130 is engaged with the moving platen 912. Accordingly, the injection mold 100 is configured for molding of the first molded article 102A. Thereafter, molding of the first molded article 102A (not shown) is performed with injection of molding material into the molding cavity 101.

The start-up molding process next includes, as shown with reference to FIG. 5B, opening of the first mold stack 106A with positioning of the first mold half 96 and the second mold half 98, along the mold-stroke axis X, into the mold open configuration O, with positioning of the moving platen 912 (FIG. 1) away from the stationary platen 914 (FIG. 1) through control of the platen-moving actuator 915 (FIG. 1). In so doing, the first molded article 102A is withdrawn with the first stack portion 110. With the opening of the injection mold 100 there is also an un-shuttering of the in-mold shutter 140 to disengage the first mold shoe 130 from the moving platen 912. The un-shuttering of the shutter member 144 includes shifting the shutter member 144 into the open position U, through control of the shutter actuator 148, wherein the shutter member 144 is disengaged from the link member 146.

The start-up molding process next includes, as shown with reference to FIG. 5C, stripping of a seal portion 103 of the first molded article 102A from where it was molded in between the inner core 112 and the outer core 114 with relative movement thereof. The foregoing involves holding the position of the stripper retainer 136 against the base plate 170, through control of the stripper actuator 153, to keep the stripper sleeve 116 that is fixed thereto in the stripper sleeve molding position, while at the same time retracting the first core retainer 132, along the mold-stroke axis X, through control of the ejector actuator 922, and thereby retract the inner core 112 that is retained thereto, a distance that is sufficient to strip the seal portion 103.

The start-up molding process next includes, as shown with reference to FIG. 5D, ejecting of the first molded article 102A from the first stack portion 110 with relative movement between the outer core 114 and the stripper sleeve 116, wherein the stripper sleeve 116 pushes the first molded article 102A off of the outer core 114. The foregoing involves holding the position of the stripper retainer 136 against the base plate 170, through control of the stripper actuator 153, to keep the stripper sleeve 116 that is fixed thereto in the stripper sleeve molding position, while at the same retracting the first core retainer 132, along the mold stroke axis X, into a retracted position B, through control of the ejector actuator 922, to retract the inner core 112 that is retained thereon a distance that is sufficient to further move the outer core 114 into stripping position by virtue of the inner core 112 having reached its rearward limit of travel relative to the outer core 114 as defined by the bayonet 113 in cooperation with the bayonet pocket 117.

The start-up molding process ends, as shown with reference to FIG. 5E, with closing of the first mold stack 106A with positioning of the first mold half 96 and the second mold half 98, along the mold-stroke axis X, into the mold closed configuration C, with positioning of the moving platen 912 towards the stationary platen 914 through control of the platen-moving actuator 915 (FIG. 1). The closing of the first mold stack 106A further includes extending the first core retainer 132, along the mold stroke axis X, into an extended position E, through control of the ejector actuator 922, to extend the inner core 112 that is retained thereon into an inner core molding position and in so doing push the outer core 114 into the outer core molding position by virtue of the inner core 112 having reached its forward limit of travel relative to the outer core 114, as defined by the bayonet 113 in cooperation with the bayonet pocket 117. With the closing of the injection mold 100 there is also a shuttering of the in-mold shutter 140 to engage the first mold shoe 130 to the moving platen 912 (FIG. 1). The shuttering of the shutter member 144 includes shifting the shutter member 144 into the shut position S, through control of the shutter actuator 148, wherein the shutter member 144 is once again engaged with the link member 146. The start-up molding process may be repeated many times, dependent on the operational status of the injection mold 100 (e.g. each of the plurality of molding stacks molding molded articles of acceptable quality), prior to execution of the production molding process.

The production molding process for the injection mold 100 will be discussed next. As the name implies, the production molding process would typically be executed, although not exclusively, after completion of the start-up molding process. The production molding process is different from the start-up molding process in that it further involves, amongst other things, operating steps relating to the use of the molded article transfer device 150, and furthermore does not include the steps of opening and closing of the injection mold 100. That is, the production molding process does not require re-arranging of the first mold half 96 and the second mold half 98 between the mold open configuration O and the mold closed configuration C, and thus the relative movement of the moving platen 912 (FIG. 1) and the stationary platen 914 (FIG. 1). A technical effect of the foregoing may include, amongst others, a shortening of the molding cycle time, wherein a component of time that was formerly contributed by the certain operations of the mold clamping assembly 996 have been removed. That is, the production cycle no longer involves waiting for the clamp shutter 920 to be successively (i.e. with each molding cycle) un-shuttered and re-shuttered, and nor does it require waiting for the movements, to and fro, of the moving platen 912 (FIG. 1). That being said, the rearranging of the first mold half 96 and the second mold half 98 is not precluded.

The production molding process begins, as shown in FIG. 5E, with the injection mold 100 being positioned in the mold closed configuration C with the first mold shoe 130 being positioned, along the mold-stroke axis X, in an extended position E such that the first mold stack 106A is closed to define the molding cavity 101 therein. In so doing, the first mold stack 106A is arranged within the first aperture 156A that is defined by the shuttle 154 of the molded article transfer device 150, the first aperture 154A being positioned in the first receiving position R. Furthermore, the shutter member 144 of the in-mold shutter 140 is in the shut position S, whereby the first mold shoe 130 is engaged with the moving platen 912 (FIG. 1). Accordingly, the injection mold 100 is configured for molding of the first molded article 102A. Thereafter, molding of the first molded article 102A (not shown) is performed with injection of molding material into the molding cavity 101.

The production molding process next includes, as shown with reference to FIG. 5F, the un-shuttering of the in-mold shutter 140 to disengaged the first mold shoe 130 from the moving platen 912 (FIG. 1). The un-shuttering of the shutter member 144 includes shifting the shutter member 144 into the open position U, through control of the shutter actuator 148, wherein the shutter member 144 is disengaged from the link member 146.

The production molding process next includes, as shown with reference to FIG. 5G, opening of the first mold stack 106A with retracting the first stack portion 110, along the mold-stroke axis X, to position the first molded article 102A that is arranged thereon in the first aperture 156A. This involves retracting the stripper retainer 136 and the first core retainer 132, in tandem, along the mold-stroke axis X, and thus the retracting of the stripper sleeve 116 and the inner core 112 that are retained thereto, respectively, wherein the outer core 114 retracts with the inner core 112 and the stripper sleeve 116 by virtue being linked together therewith by the first molded article 102A. The retracting of the stripper retainer 136 and the first core retainer 132 is provided through control of the stripper actuator 153 and the ejector actuator 922, respectively.

The production molding process next includes, as shown with reference to FIG. 5H, a first stage of arranging the first stack portion 110 to eject the first molded article 102A into the first aperture 156A of the shuttle 154, and more particularly the stripping of the seal portion 103 of the first molded article 102A from where it was molded in between the inner core 112 and the outer core 114 with relative movement thereof. The foregoing involves holding the position of the stripper retainer 136, through control of the stripper actuator 153 (which in this case is made quite simple given that the stripper actuator 153 has reached its rearward limit of travel), to keep the stripper sleeve 116 that is fixed thereto immobile, whereby the first molded article 102A is held in the first aperture 156A. The foregoing further involves retracting the first core retainer 132, through control of the ejector actuator 922, to retract the inner core 112 that is retained thereon, along the mold stroke axis X, a distance, relative to the outer core 114 which is kept immobile by virtue of being arranged within the first molded article 102A, that is sufficient to strip the seal portion 103.

The production molding process next includes, as shown with reference to FIG. 5I, a final stage of arranging the first stack portion 110 to eject the first molded article 102A into the first aperture 156A of the shuttle 154, and furthermore retracting of the first stack portion 110 from the first aperture 156A. The foregoing involves continuing to hold the position of the stripper retainer 136, through control of the stripper actuator 153, to keep the stripper sleeve 116 that is fixed thereto immobile, whereby the first molded article 102A is held in the first aperture 156A. The foregoing further involves retracting the first core retainer 132, along the mold stroke axis X, into the retracted position B, through control of the ejector actuator 922, to retract the inner core 112 that is retained thereon a distance that is sufficient to further move the outer core 114 into stripping position by virtue of the inner core 112 having reached its rearward limit of travel relative to the outer core 114 as defined by the bayonet 113 in cooperation with the bayonet pocket 117. The first molded article 102A is stripped from the outer core 114 as it is held in the first aperture 156A, through supporting contact with a top of the stripper sleeve 116, and the outer core 114 is retracted therefrom with its retraction to the stripping position.

The production molding process next includes, as shown with reference to FIG. 5J, shuttling of the shuttle 154 to transfer the first molded article 102A within the first aperture 156A. The foregoing involves shuttling movement of the shuttle 154 between the first mold half 96 and the second mold half 98 of the injection mold 100, along the shuttling axis Y (FIG. 3), through control of the shuttle actuator 168, wherein the first channel 160A (i.e. the movable part of the first aperture 156A), and with it the first molded article 102A, is moved from the first receiving position R (FIG. 5E) to the first transfer position T.

The production molding process ends, as shown with reference to FIG. 5K, with the passing of the first molded article 102A along the first channel 160A towards the exit 164 (FIG. 3) thereof (shown only by virtue of the disappearance of the first molded article 102A from the first channel 160A), and closing of the first mold stack 106A. The closing of the first mold stack 106A involves rearranging the first mold shoe 130 into the extended position E with extension of the first core retainer 132, along the mold stroke axis X, through control of the ejector actuator 922, to extend the inner core 112 that is retained thereon into the inner core molding position and in so doing push the outer core 114 into the outer core molding position by virtue of the inner core 112 having reached its forward limit of travel relative to the outer core 114, as defined by the bayonet 113 in cooperation with the bayonet pocket 117. In so doing, the first stack portion 110 is arranged within the second aperture 156B that is defined by the shuttle 154 of the molded article transfer device 150, the second aperture 154B being positioned in the first receiving position R. While not shown, prior to molding of the another of the first molded article 102A, there is a further requirement for shuttering of the in-mold shutter 140 to engage the first mold shoe 130 to the moving platen 912 (FIG. 1).

In view of the foregoing, those persons of skill in the art would undoubtedly recognize alternative non-limiting embodiments of the injection mold including one or both of the molded article transfer device 150 and/or an in-mold shutter 140. One such example of an alternative non-limiting embodiment may be appreciated with reference to the injection mold 200 shown in FIG. 6A. The injection mold 200 is structured similarly to the injection mold 100 of FIG. 5A, and as such only the differences of construction and operation thereof will be described in detail in the description that follows.

The injection mold 200 includes an alternative non-limiting embodiment of a first mold half 196, and the second mold half 98 described previously.



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stats Patent Info
Application #
US 20140151929 A1
Publish Date
06/05/2014
Document #
14092996
File Date
11/28/2013
USPTO Class
2643281
Other USPTO Classes
International Class
29C45/40
Drawings
40


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Plastic And Nonmetallic Article Shaping Or Treating: Processes   Mechanical Shaping Or Molding To Form Or Reform Shaped Article   Shaping Against Forming Surface (e.g., Casting, Die Shaping, Etc.)   Applying Heat Or Pressure   Introducing Material Under Pressure Into A Closed Mold Cavity (e.g., Injection Molding, Etc.)