JP4230985B2 - Molding apparatus, molding method and molded product - Google Patents

Description

  The present invention relates to a molding apparatus and molding method for forming a secondary molded article by insert molding a primary molded article, and a molded article molded by the molding apparatus or molding method.

A conventional molding apparatus includes a movable mold and a fixed mold. The movable mold is attached to the moving side of the injection molding apparatus, and the fixed mold is attached to the fixed side of the injection molding apparatus. When the movable mold was joined to the fixed mold by driving the injection molding apparatus, a primary mold and a secondary mold were formed between the movable mold and the fixed mold. The primary molded product was formed by the first molding process in which the synthetic resin material was poured into the primary mold. The primary molded product is transferred to a secondary mold by a runner integral with the primary molded product held by a transfer means. By the second molding step in which another synthetic resin material is poured into the secondary molding die, a secondary molded product in which the primary molded product is wrapped with another synthetic resin material is molded (for example, Patent Document 1).
JP-A-8-118410

  The transfer means of the conventional molding apparatus includes a rotating table that holds a runner of the primary molded product, a rotating shaft that rotates the rotating table, a power device such as a hydraulic device that drives the rotating shaft, and a pressing shaft that pushes out the rotating table. The sliding base to which the pressing shaft is attached and the hydraulic device for sliding the sliding base. The moving mold incorporates the transfer means, and further requires a space for incorporating the transfer means. For this reason, the conventional molding apparatus has a large number of parts, is expensive, has a complicated structure, is troublesome to assemble, is inconvenient to transport and store due to its large size and weight, and is extremely difficult to attach to the injection molding apparatus. There was a point. Further, as a transfer means of the forming apparatus, an automatic transfer apparatus that holds the runner of the primary molded product between a pair of claw members and transfers the primary molded product from the primary mold to the secondary mold can be considered. However, this automatic transfer device cannot be employed because it is difficult to reliably position the primary molded product on the secondary mold.

  The invention of the present application has been devised in view of the above-mentioned problems, and it is possible to use an automatic transfer device, eliminate the need to incorporate transfer means, reduce the number of parts, and are inexpensive and simple in structure. The first object of the present invention is to provide a molding apparatus that is easy to assemble, is easy to transport and store due to its small size and light weight, and is simply attached to an injection molding apparatus. In addition, the number of parts of the molding device can be reduced and the structure can be simplified, making the molding device cheaper, smaller, lighter and easier to assemble, making it easier to transport and store, and injection molding. It is a second object of the present invention to provide a molding method that can be easily attached to an apparatus. Furthermore, it is a third object to provide a molded product suitable for the molding apparatus and the molding method.

  In order to achieve the first object, the molding apparatus according to claim 1 includes a first mold and a second mold, and the first mold and the second mold are joined together. A molding apparatus in which a primary mold and a secondary mold are formed by performing a primary molding recess for molding a primary molded product and a primary runner for pouring a resin material into the primary molding recess A groove and a forming projection for forming a guide hole in the primary runner formed by the primary runner groove are formed, and the secondary forming die is formed by enclosing the primary molded product in a secondary shape. A secondary molding recess, a runner engagement groove for engaging the primary runner, and a guide hole of the primary runner are inserted into the primary runner, the primary molding is guided to the secondary molding recess, and the primary runner is engaged with the runner. The guide shaft that guides to the groove is shaped. It is.

  In order to achieve the first object, the molding apparatus according to claim 2 of the present application includes a first mold and a second mold, and the first mold and the second mold are joined to each other. A molding apparatus in which a primary mold and a secondary mold are formed by performing a primary molding recess for molding a primary molded product and a primary runner for pouring a resin material into the primary molding recess A groove, a protruding piece forming recess for forming a protruding piece connected to the primary runner formed by the primary runner groove, and a forming protrusion for forming a guide hole in the protruding piece are formed. A secondary molding recess that molds the secondary molding in a form that encloses the primary molding, a runner engagement groove that engages the primary runner, and a projection engagement groove that engages the projection. Insert into the guide hole of the projecting piece, the primary molding is the secondary Guided to form recesses, to guide the primary runner to the runner engaging groove, the guide shaft for guiding the projecting piece in the projecting piece engagement recess is formed.

  In the molding apparatus according to claim 3 of the present application, in order to achieve the first object, the primary mold is formed with a grip molding recess for molding a grip piece on the projecting piece, and the secondary mold has An insertion recess for inserting the gripping piece is formed.

  In the molding apparatus according to claim 4 of the present application, in order to achieve the first object, the primary runner groove, the molding protrusion, the runner engagement groove, and the guide shaft are formed in a first mold. .

  In order to achieve the first object, the forming apparatus according to claim 5 of the present invention is configured to have the primary runner groove, the protruding piece forming recess, the forming protrusion, the runner engaging groove, the protruding piece engaging recess, and the guide. The shaft is formed in the first mold.

  In the molding apparatus according to claim 6 of the present application, in order to achieve the first object, the grip molding recess and the insertion recess are formed in a second mold.

  In order to achieve the first object, the molding apparatus according to claim 7 of the present application includes the primary runner guided by the guide shaft when the second mold is joined to the first mold. And a pressing pin that pushes at least one of the primary molded products into the first mold side.

  In the molding apparatus according to claim 8 of the present application, in order to achieve the first object, the pressing pin is provided movably on the second mold, and is attached to the first mold by an elastic member. It is energized.

  In the molding apparatus according to claim 9 of the present application, in order to achieve the first object, an insertion hole through which the guide shaft provided in the first mold is inserted is formed in the second mold. Yes.

  In the molding apparatus according to claim 10 of the present application, in order to achieve the first object, the guide shaft is movably provided on the first mold, and is attached to the second mold by an elastic member. It is energized.

  In the molding apparatus according to claim 11 of the present application, in order to achieve the first object, the molding protrusion is formed in a truncated cone shape, and the guide hole is extended from the opening on the first mold side to the second mold. Molding is performed so that the inner diameter decreases toward the opening on the mold side.

  In the molding apparatus according to claim 12 of the present invention, in order to achieve the first object, the guide shaft has an outer diameter on the second mold side of the guide hole and an inner diameter of the first mold side. It is formed in the range of the inner diameter of the opening, and is inclined so that the outer diameter of the tip portion becomes smaller toward the second mold side.

In order to achieve the second object, the molding method according to claim 13 includes a first mold and a second mold, and the first mold and the second mold are joined together. A molding method for molding a molded product of a molding apparatus in which a primary molding die and a secondary molding die are formed by the first molding of a primary molding having a runner having a guide hole in the primary molding die. A forming step, a transferring step of transferring the primary molded product formed in the first forming step to the secondary forming die, and engaging the guide hole of the runner with the guide shaft of the secondary forming die; Thus the bonding of the second die and the first die, the inserted step of inserted in said secondary mold while guiding the primary molded product by the guide shaft, the secondary mold In, the primary molded product is insert molded to form a secondary molded product That consists of the second molding step.

In order to achieve the second object, a molding method according to claim 14 of the present application comprises a first mold and a second mold, and the first mold and the second mold are joined together. A molding method for molding a molded product of a molding apparatus in which a primary molding die and a secondary molding die are formed, wherein the primary molding has a runner in which projecting pieces having guide holes are formed in the primary molding die. A first molding step of molding the first molding, and a primary molding molded in the first molding step is transferred to the secondary molding die, and the guide hole of the projecting piece is used as a guide shaft of the secondary molding die. a transfer step of engaging said first depending on the mold and the bonding of the second die, inserted step of inserted said primary molded product in said secondary mold while guided by the guide shaft In the secondary mold, the primary molded product is insert-molded to form a secondary And a second molding step for molding the shape thereof.

A molded product according to claim 15 of the present application is a molded product molded by the molding apparatus to achieve the third object, and a model object and a runner that connects the model object in a substantially horizontal direction, It consists of a guide hole formed in the runner in a substantially vertical direction.

A molded product according to claim 16 of the present application is a molded product molded by the molding apparatus to achieve the third object, and a model object and a runner that connects the model object in a substantially horizontal direction, It consists of a projecting piece formed integrally with the runner and a guide hole formed in the projecting piece in a substantially vertical direction.

The molded product according to claim 17 of the present application is a molded product molded by the molding apparatus to achieve the third object, and a model object and a runner that connects the model object in a substantially horizontal direction, the runner and the protrusion formed integrally consists guide hole and which is formed in a substantially vertical direction to the projecting piece, the protrusion is gripping piece projecting substantially vertically is formed.

The molded product according to claim 18 of the present application is a molded product molded by the molding apparatus to achieve the third object, and a model object and a runner that connects the model object in a substantially horizontal direction, The runner is formed with a guide hole formed in a substantially vertical direction in the runner, and the guide hole has an inner peripheral surface inclined so that an inner diameter becomes narrower from one opening toward the other opening.

  In the molded product according to claim 19 of the present application, in order to achieve the third object, the runner has a substantially quadrangular cross section.

  The molding device according to the present invention includes a primary molding recess in a primary molding die, a primary runner groove for pouring a resin material into the primary molding recess, and a guide hole in the primary runner molded by the primary runner groove. A molding projection is formed, a secondary molding recess is formed in the secondary molding die so as to enclose the primary molding, a runner engagement groove for engaging the primary runner, and a primary runner The guide shaft is inserted into the guide hole, the primary molded product is guided to the secondary molding recess, and the primary runner is guided to the runner engagement groove, so that the automatic transfer device can be used and the transfer means is incorporated. There is an effect that there is no necessity. Since the molding apparatus according to the present invention does not need to incorporate transfer means, the number of parts is reduced and the cost is low, the structure is simple and the assembly is easy, and the conveyance and storage are convenient due to the miniaturization and weight reduction. There is an effect that it can be easily attached to the injection molding apparatus.

  The molding apparatus according to the present invention has the above-described effect, and in addition to the above-described configuration, the primary molding die is configured to project a projecting piece connected to the primary runner formed by the primary runner groove. A concave portion and a molding protrusion for molding a guide hole are formed in the projecting piece, and the secondary molding die is inserted into the projecting piece engaging concave portion for engaging the projecting piece, and the guide hole of the projecting piece. The guide shaft is formed to guide the primary molded product to the secondary molding recess, guide the primary runner to the runner engagement groove, and guide the projecting piece to the projecting piece engagement recess. There is an effect that no guide hole is formed in the runner.

  The molding apparatus according to the present invention has the above-described effects, and the primary molding die is formed with a grip molding recess for molding the grip piece on the protruding piece, and the gripping piece is inserted into the secondary mold. Since the insertion concave portion to be formed is formed, the grip piece can be formed on the primary molded product, and the primary molded product can be easily transferred to the secondary mold by gripping the grip piece. .

  The molding apparatus according to the present invention has the above-described effects, and the second mold includes the primary runner guided by the guide shaft and the primary molded product when joined to the first mold. Since the pressing pin for pressing at least one of the first mold into the first mold side is provided, there is an effect that the primary molding can be surely pushed into the secondary molding recess and the primary runner can be pushed into the runner engagement groove. .

  The molding apparatus according to the present invention has the above-described effect, wherein the molding protrusion is formed in a truncated cone shape, and the guide hole is directed from the opening on the first mold side to the opening on the second mold side. Therefore, the guide shaft can be reliably inserted into the guide hole.

  The molding apparatus according to the present invention has the above-described effect, and the guide shaft has an outer diameter in a range between the inner diameter of the opening on the second mold side of the guide hole and the inner diameter of the opening on the first mold side. Formed and inclined so that the outer diameter of the tip portion becomes smaller toward the second mold side, so that the guide shaft can be surely inserted into the guide hole, and the outside of the guide shaft Since the diameter is larger than the inner diameter of the opening on the second mold side of the guide hole, it can be guided in such a way that the guide shaft is press-fitted into the guide hole. There exists an effect that it can guide to a forming crevice and a runner engagement slot.

The molding method according to the present invention includes a first molding step of molding a primary molded product having a runner having guide holes in a primary molding die, and a secondary molding of the primary molded product molded in the first molding step. transferred to the mold, a transfer step of engaging the runners of the guide holes in the secondary mold guide shaft, thus the first mold and the junction of the second mold, and guides the primary molded product by the guide shaft However, the automatic transfer device includes an insertion step of inserting into the secondary mold and a second molding step of forming the secondary molding by insert molding of the primary molding in the secondary molding die. This makes it possible to reduce the number of parts in the molding equipment and simplify the structure, making the molding equipment cheaper, smaller, lighter and easier to assemble, making it easier to transport and store. Easy installation on injection molding equipment It is possible.

  In the molding method according to the present invention, in the first molding step, a primary molded product having a runner on which a projecting piece having a guide hole is formed is molded, so that it is not necessary to form a guide hole in the runner. There is.

Since the molded product according to the present invention comprises a model, a runner that connects the model in a substantially horizontal direction, and a guide hole formed in the runner in a substantially vertical direction, at the time of molding by a multicolor molding device, The guide hole can be used to guide the primary molded product to the secondary mold, contributing to the simplification of the structure of the molding apparatus. Further, when packing the box, the guide hole is engaged with the protrusion in the box. There is an effect that it can be combined and stored in the box without rattling.

  In addition to the above effects, the molded product according to the present invention has a projecting piece formed integrally with the runner, and a guide hole is formed in the projecting piece in a substantially vertical direction. Therefore, it is necessary to form a guide hole in the runner. There is no effect.

  In addition to the effects described above, the molded product according to the present invention has a gripping piece protruding substantially in the vertical direction on the protruding piece or the runner. The primary molded product can be reliably transferred from the primary mold to the secondary mold.

  In addition to the above effects, the molded product according to the present invention has an inner peripheral surface that is inclined so that the inner diameter is narrowed from one opening toward the other opening. There is an effect that the guide hole can be easily inserted into the shaft and can be easily engaged with the protrusion in the box when packing.

  In addition to the above effects, the molded product according to the present invention has a substantially square cross section, so it is difficult to break, and because the upper and lower surfaces are flat, guide holes are easily formed. Compared with a circular runner at the time of molding, there is an effect that it is surely pressed without deformation.

  An embodiment of a molding apparatus according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a usage state of the molding apparatus. FIG. 2 is a side cross-sectional view showing one embodiment of a molding apparatus according to the present invention. FIG. 3 is a side sectional view showing a state of the molding apparatus of FIG. 2 during molding. 4 is a side sectional view showing a state before the molded product of the molding apparatus of FIG. 2 is transferred. FIG. 5 is a side cross-sectional view showing a state in which a molded product of the molding apparatus of FIG. 2 is being transferred. FIG. 6 is a side sectional view showing a state after the molded product of the molding apparatus of FIG. 2 is transferred. FIG. 7 is a surface (joint surface) view of the first mold (moving mold) of the molding apparatus of FIG. FIG. 8 is a surface (joint surface) view of a second mold (fixed mold) of the molding apparatus of FIG. 2. 9 is a cross-sectional view of a main part of the molding apparatus of FIG. 2, where (a) is a cross-sectional view taken along the line AA in FIG. 7, (b) is a cross-sectional view taken along the line BB in FIG. It is CC sectional drawing of.

  FIG. 10 is a front view of a primary molded product molded by the molding apparatus of FIG. FIG. 11 is a front view of a secondary molded product molded by the molding apparatus of FIG. 12 is a cross-sectional view of the main part of the secondary molded product of FIG. 11, where (a) is a cross-sectional view taken along line AA in FIG. 11, (b) is a cross-sectional view taken along line BB in FIG. FIG. 11 is a cross-sectional view taken along a line CC in FIG. 11, and FIG. 21D is a cross-sectional view taken along a line DD in FIG. FIG. 13 is a cross-sectional view showing another form of the forming protrusion of the forming apparatus. FIG. 14 is an explanatory diagram for explaining the movement of the guide shaft and the pressing pin. FIG. 15 is an explanatory diagram for explaining the movement of the guide shaft in another form. FIG. 16 is an explanatory view for explaining the movement of the molding protrusion of another form.

  FIG. 17 is a side cross-sectional view showing another embodiment of the molding apparatus according to the present invention. FIG. 18 is a side sectional view showing a state before the molded product of the molding apparatus of FIG. 17 is transferred. FIG. 19 is a side cross-sectional view showing a state where the molded product of the molding apparatus of FIG. 17 is being transferred. 20 is a surface (joint surface) view of a second mold (fixed mold) of the molding apparatus of FIG. FIG. 21 is a front view of a primary molded product molded by the molding apparatus of FIG.

As shown in FIG. 2, the molding apparatus 1 includes a first mold 10 and a second mold 70, and as shown in FIG. 3, the first mold 10 and the second mold The primary mold 30 and the secondary mold 50 are formed by joining 70. The primary molding die 30 is molded by a primary molding recess 91 for molding the primary molding 101, a primary runner groove 32 for pouring a first synthetic resin material into the primary molding recess 91, and the primary runner groove 32. A forming projection 41 for forming the guide hole 110 is formed in the primary runner 103.

  The secondary molding die 50 includes a secondary molding recess 92 that molds the secondary molding 102 so as to enclose the primary molding 101, a runner engagement groove 52 that engages the primary runner 103, A guide shaft 61 is formed which is inserted into the guide hole 110 of the primary runner 103, guides the primary molded product 101 to the secondary molding recess 92, and guides the primary runner 103 to the runner engagement groove 52. .

  The primary mold 30 is formed with a projecting piece forming recess 40 for forming a projecting piece 106 connected to the primary runner 103 formed by the primary runner groove 32, and a guide hole 110 is formed in the projecting piece 106. A molding protrusion 41 may be formed. In such a case, the secondary molding die 50 is inserted into the projecting piece engaging recess 60 for engaging the projecting piece 106 and the guide hole 110 of the projecting piece 106, and the primary molded product 101 is inserted into the secondary molding die 50. A guide shaft 61 is formed which guides to the next forming recess 92, guides the primary runner 103 to the runner engaging groove 52, and guides the projecting piece 106 to the projecting piece engaging recess 60.

  In addition, as shown in FIGS. 17 and 18, the primary mold 30 is formed with a grip forming recess 73 for forming the grip piece 107 on the protruding piece 106. The secondary mold 50 is formed with an insertion recess 75 into which the grip piece 107 is inserted. The primary runner groove 32, the protruding piece forming recess 40, the forming protrusion 41, the runner engaging groove 52, the protruding piece engaging recess 60, and the guide shaft 61 are formed in the first mold 10. ing. Further, the grip molding recess 73 and the insertion recess 75 are formed in the second mold 70.

  When the first mold 10 is joined to the second mold 70, at least one of the primary runner 103 and the primary molded product 101 guided by the guide shaft 61 is used as the first mold. A pressing pin 85 to be pushed into the 10 side is provided. The pressing pin 85 may be movably provided in the second mold 70 and may be urged toward the first mold 10 by an elastic member 86.

  The second mold 70 is formed with an insertion hole 76 through which the guide shaft 61 provided in the first mold 10 is inserted. As shown in FIG. 15, the guide shaft 61 may be provided movably on the first mold 10 and may be urged toward the second mold 70 by an elastic member 62.

  As shown in FIGS. 13 and 14, the molding protrusion 41 is formed in a truncated cone shape, and the guide hole 110 is changed from the opening 111 on the first mold 10 side to the opening 112 on the second mold 70 side. You may make it shape | mold so that an internal diameter may become small toward it. The guide shaft 61 has an outer diameter D in a range of an inner diameter d2 of the opening 112 on the second mold 70 side of the guide hole 110 and an inner diameter d1 of the opening 111 on the first mold 10 side. It is desirable that the outer diameter D of 64 is inclined so as to become smaller toward the second mold 70 side.

  Molding comprising a first mold 10 and a second mold 70, wherein a primary mold 30 and a secondary mold 50 are formed by joining the first mold 10 and the second mold 70. A molding method for molding the molded product of the apparatus 1 will be described. The molding method includes a first molding step for molding a primary molding 101 having a runner 103 having a guide hole 110 in the primary molding die 30 and a primary molding 101 molded in the first molding step. Is transferred to the secondary mold 50, the transfer step of engaging the guide hole 110 of the runner 103 with the guide shaft 61 of the secondary mold 50, the first mold 10 and the second mold. An insertion step of inserting the primary molded product 101 into the secondary molding die 50 while guiding the primary molded product 101 by the guide shaft 61 by joining the mold 70, and in the secondary molding die 50, the primary molded product 101 And a second molding step of molding the secondary molded product 102 by insert molding.

  The molding method includes a first molding step of molding a primary molded product 101 having a runner 103 in which a projecting piece 106 having a guide hole 110 is formed in the primary molding die 30, and the first molding. Transferring the primary molded product 101 formed in the process to the secondary mold 50 and engaging the guide hole 110 of the projecting piece 106 with the guide shaft 61 of the secondary mold 50; An insertion step of inserting the primary molded article 101 into the secondary mold 50 while guiding the primary molded article 101 by the guide shaft 61 by joining the first mold 10 and the second mold 70; The molding die 50 may include a second molding step in which the primary molded product 101 is insert-molded to mold the secondary molded product 102.

  As shown in FIG. 11, the molded product 100 molded by the molding apparatus 1 and the molding method includes a model object 102, a runner 103 that connects the model object 102 in a substantially horizontal direction, and a substantially vertical direction to the runner 103. And a guide hole 110 formed in the above. The molded product 100 includes a model object 102, a runner 103 connecting the model object 102 in a substantially horizontal direction, a projecting piece 106 formed integrally with the runner 103, and a substantially vertical direction on the projecting piece 106. Alternatively, the guide hole 110 may be formed.

  As shown in FIG. 2, the protruding piece 106 or the runner 103 may be formed with a gripping piece 107 that protrudes in a substantially vertical direction. It is desirable that the inner peripheral surface of the guide hole 110 is inclined so that the inner diameter becomes narrower from one opening 111 toward the other opening 112. The runner 103 is preferably formed to have a substantially square cross section.

Further, the molding apparatus will be described in detail. FIG. 1 is a perspective view showing a usage state of the molding apparatus, and shows a state where the molding apparatus 1 is mounted on the injection molding apparatus W. FIG. The injection molding apparatus W shown in FIG. 1 shows a simplified structure, and a portion on which a first mold 10 that is one of the molding apparatuses 1 divided into two on the right side in the drawing is mounted. The left side of the figure is a portion on which the second mold 70 which is the other side of the molding apparatus 1 is mounted. The side on which the first mold 10 is mounted (hereinafter referred to as “moving side”) is a portion configured to be able to reciprocate toward the second mold 70 side. The mounted side (hereinafter referred to as “fixed side”) is fixed in a state of facing the first mold 10. Although detailed explanation by illustration is omitted, the injection molding apparatus W is provided with a drive mechanism for reciprocating the moving side, an injection unit for injecting molten synthetic resin into the molding apparatus 1 at a high pressure, and the like. ing. For convenience of explanation, the first mold 10 attached to the moving side of the injection molding apparatus W is referred to as a moving mold, and the second mold 70 attached to the fixed side is referred to as a fixed mold.
The molding apparatus 1 according to the present embodiment is an apparatus that can be used in a molding method called insert molding or multicolor molding, and has two types of molding dies in order to obtain one molded product. ing. With insert molding or multicolor molding, the resin molding (primary molding) molded with the first molding die (primary molding die) is attached to the next molding die (secondary molding die) from the previous synthetic resin. Is a molding method in which a molten resin having a low melting point is injected to obtain a molded product (secondary molded product) in a state where all or a part of the primary molded product is covered with a different resin. As shown in FIG. 1, the molding apparatus 1 includes a moving mold 10 attached to the moving side of the injection molding apparatus W and a fixed mold 70 attached to the fixed side of the injection molding apparatus W. On the opposing surfaces of both the moving mold 10 and the fixed mold 70, concave portions constituting a primary molding die 30 for forming a primary molding and a secondary molding die 50 for forming a secondary molding, respectively. Is provided.

2 shows the movable mold 10 and the fixed mold 70 attached to the injection molding apparatus W with the injection molding apparatus W omitted, and the molding surface of the movable mold 10 and the fixed mold 70 are shown. The molding surfaces are arranged to face each other.
As shown in FIG. 2, the movable mold 10 includes a mold base 11 disposed on the front side (the fixed mold 70 side), a base 12 disposed on the rear side, and between the mold base 11 and the base 12. And a block body 13 provided in In the movable mold 10, the block body 13 is arranged at the upper part and the lower part between the mold base 11 and the base 12, and an empty space 15 is formed between the mold base 11 and the base 12. The base 12 is an attachment portion for the moving side of the injection molding apparatus W.

In the vacant space 15, the sliding table 16 is in the front-rear direction (the direction in which the movable mold 10 and the fixed mold 70 are arranged, hereinafter, the direction from the movable mold 10 to the fixed mold 70 is “front”, The direction from the fixed mold 70 toward the moving mold is referred to as “rearward”). The sliding table 16 is provided with an ejecting pin 19 for projecting the molded product forward and an ejecting pin 20 for projecting the runner forward.
The projecting pin 19 and the projecting pin 20 project into the primary mold 30 and the secondary mold 50 formed by joining the movable mold 10 and the fixed mold 70 in the initial state (the state in which the projecting pin is not projected). In order to avoid this, the tip is provided so as to be flush with the inner surface of the mold (the primary mold 30 and the secondary mold 50) carved on the surface 25 of the mold base 11.
The sliding table 16 is attached to a pair of hydraulic cylinders 21 and 21 provided on the mold base 11 side in the empty chamber 15. Specifically, the sliding table 16 is attached to the front ends of the drive shafts 22 and 22 of the hydraulic cylinders 21 and 21 oriented in the direction of the base 10. Since the pair of hydraulic cylinders 21 and 21 are attached to the mold base 11 side, the slide base 16 is moved forward (in the direction of the mold base 11) by pulling the drive shafts 22 and 22, thereby driving the drive shaft. The slide base 16 is moved backward (in the direction of the base 12) by pushing out 22 and 22. Further, if the pair of hydraulic cylinders 21 and 21 is attached to the base 12 side, the sliding base 16 is moved forward by pushing out the driving shafts 22 and 22, and the sliding is performed by pulling the driving shafts 22 and 22. The moving table 16 is moved backward. The moving means of the slide base 16 is not limited to the hydraulic cylinders 21 and 21.

  FIG. 7 shows the shape of the joint surface of the movable mold 10 (joint surface with the fixed mold 70). As shown in FIG. 7, the moving-side primary molding recess 31 and the secondary molding die 50 that constitute a part of the primary molding die 30 are formed on the joint surface of the movable die 10, that is, the surface 25 of the molding die base 11. A moving side secondary forming concave portion 51 constituting the portion is formed. The moving side primary molding recess 31 is formed below the center of the surface 25 of the mold base 11, and the moving side secondary molding recess 51 is formed above the center of the surface 25 of the mold base 11. . That is, the moving side primary molding recess 31 and the moving side secondary molding recess 51 are distributed and arranged at different positions on the surface 25 of the mold base 11. A primary runner groove 32 serving as a flow path for pouring the first synthetic resin material into the moving side primary molding recess 31 is formed around the moving side primary molding recess 31. The cross-sectional shape of the primary runner groove 32 is formed in a trapezoidal shape in which the width on the opening side is wider than the width on the bottom surface, as shown in FIG. 9C, and has a side surface that is inclined from the opening toward the bottom surface. ing.

As shown in FIG. 7, a primary runner groove 32 is provided around the moving primary molding recess 31 provided below the moving mold 10 so as to surround the entire periphery of the moving primary molding recess 31. The primary runner groove 32 includes a substantially rectangular primary main runner groove 32a that forms the outer peripheral portion, and a primary auxiliary runner groove 32b that communicates the primary main runner groove 32a with the moving-side primary molding recess 31.
At predetermined positions of the primary runner groove 32 and the moving-side primary molding recess 31, through holes 35 and 36 for allowing the tips of the protrusion pins 19 and 20 to protrude and enter are formed. Further, at four locations around the primary main runner groove 32a, protruding piece forming recesses 40, which are rectangular recesses protruding in the outer peripheral direction, are formed so as to be connected to the primary main runner groove 32a. The projecting piece forming recess 40 forms a flat projecting piece 106 connected to the primary main runner 104 formed by the primary main runner groove 32a. Formed in the protruding piece forming recess 40 is a forming protrusion 41 for forming the guide hole 110 in the protruding piece 106.

Further, as shown in FIG. 7, a runner engaging groove that engages with the primary runner 103 formed by the primary runner groove 32 is provided around the moving side secondary forming recess 51 provided above the moving mold 10. 52 is formed.
The runner engagement groove 52 includes a substantially rectangular main runner engagement groove 52a that constitutes the outer peripheral portion, and an auxiliary runner engagement groove 52b that communicates the main runner engagement groove 52a with the moving-side secondary forming recess 51. Consists of.
Further, at four positions around the main runner engagement groove 52a, projecting piece engagement recesses 60 are formed so as to be connected to the main runner engagement groove 52a.

The main runner engagement groove 52a engages the primary main runner 104 formed by the primary main runner groove 32a. The auxiliary runner engagement groove 52b engages the primary auxiliary runner 105 formed by the primary auxiliary runner groove 32b. That is, the primary runner groove 32a and the main runner engagement groove 52a have substantially the same shape, and the primary auxiliary runner groove 32b and the auxiliary runner engagement groove 52b also have substantially the same shape (however, both The direction in which the mold is placed on the mold base 11 may be different (see FIG. 7). In the present embodiment, the shape of the runner engagement groove 52 (main runner engagement groove 52a, auxiliary runner engagement groove 52b) is such that the primary runner 103 (primary main runner 104, primary auxiliary runner 105) is quickly and without resistance. It is housed and shaped so as not to protrude beyond the surface of the moving mold 10.
The protruding piece engaging recess 60 engages the protruding piece 106 formed by the protruding piece forming recessed portion 40. That is, the protruding piece forming recess 40 and the protruding piece engaging recess 60 have substantially the same shape, and the position of the protruding piece forming recess 40 with respect to the primary main runner groove 32a is the main runner engagement of the protruding piece engaging recess 60. It corresponds to the position with respect to the groove 52a (as described above, substantially the same shape as the primary main runner groove 32).
The projecting piece engaging recess 60 is provided with a guide shaft 61 that guides the guide hole 110 formed in the projecting piece 106. The guide shaft 61 is formed in a circular shaft shape, and is fixedly attached to an attachment hole 63 formed in the mold base 11. The guide shaft 61 protrudes from the surface 25 of the mold base 11 to the fixed mold 70 side. As shown in FIG. 14, the tip 64 of the guide shaft 61 is inclined so that the outer diameter D becomes thinner toward the fixed mold 70 side. At predetermined positions of the runner engagement groove 52 and the moving side secondary forming recess 51, through holes 35 and 36 for protruding pins are formed.

  FIG. 8 shows the shape of the surface of the fixed mold 70 (joint surface with the moving mold 10). As shown in FIG. 8, on the surface 77 of the fixed mold 70, a fixed primary molding recess 71 that is joined to the movable primary molding recess 31 of the movable mold 10 to form the primary molding die 30, and the movable mold A fixed-side secondary molding concave portion 81 is formed which is joined to the ten moving-side secondary molding concave portions 51 and constitutes the secondary molding die 50. The fixed-side primary molding recess 71 is formed below the center of the surface 77 of the fixed mold 70, and the fixed-side secondary molding recess 81 is formed above the center of the surface 77 of the fixed mold 70. . That is, the fixed-side primary molding concave portion 71 and the fixed-side secondary molding concave portion 81 are distributed and arranged at different positions on the surface 77 of the fixed mold 70. A secondary runner groove 82 for pouring the second synthetic resin material into the fixed side secondary molding recess 81 is formed in the vicinity of the fixed side secondary molding recess 81.

  As shown in FIG. 8, the secondary runner groove 82 includes a secondary main runner groove 82 a and a secondary auxiliary runner groove 82 b that communicates the secondary main runner groove 82 a and the fixed-side secondary forming recess 81. Further, an insertion hole 76 through which the guide shaft 61 is inserted when joined to the movable mold 10 is formed in the surface 77 of the fixed mold 70. The two-dot chain line shown in FIG. 8 represents the primary main runner 104, the primary auxiliary runner 105, and the protruding piece 106 of the primary molded product 101. As shown in FIG. 9C, the secondary runner groove 82 has a substantially trapezoidal cross section.

The fixed mold 70 is provided with a pressing pin 85 that presses the primary main runner 104, the primary auxiliary runner 105, and the protruding piece 106 of the primary molded product 101 so as to be movable in the front-rear direction.
As shown in FIG. 14, the pressing pin 85 includes a shaft portion 87 and a flange portion 88. The fixed mold 70 is formed with a guide hole 78 for guiding the shaft portion 87 in the front-rear direction and a storage chamber 79 for storing the flange portion 88. The diameter of the guide hole 78 is smaller than the diameter of the flange portion 88, and only the shaft portion 87 of the pressing pin 85 can project from the surface 77 of the fixed mold 70 from the guide hole 78. A coil spring-like elastic member 86 is provided in the storage chamber 79 so as to be inserted between the front wall 79 a of the storage chamber 79 and the flange portion 88.
The pressing pin 85 is biased by the elastic member 86 so as to be pushed toward the moving mold 10 side. The front end surface of the pressing pin 85 is a flat surface so as to be in uniform contact with the surface of the movable mold 10, and is normally biased so that the shaft portion 87 and the front end surface protrude from the surface 77 of the fixed mold 70. The flange portion 88 is prevented from being pulled out by being press-engaged with the rear wall 79b of the storage chamber 79. Further, the pressing pin 85 is pressed by the fixed mold 70 while the exposed portion of the primary runner 103 is pressed and held at the time of joining the movable mold 10 and the fixed mold 70, and the tip surface of the fixed mold 70. Retreats to the surface position.

In the present embodiment, the primary molded product 101 molded by the first mold 10 is taken out and mounted in the second mold 70, and the secondary molded product 102 formed by the second mold 70 is used. As a means for taking out and conveying it to a predetermined position, an automatic transfer device (transfer means) 120 for the molded product is used. The automatic transfer device 120 has an independent drive mechanism different from the first mold 10 and the second mold 70, and the drive mechanism is driven and controlled in synchronization with the molding operation by the injection molding apparatus W. It has come to be.
As shown in FIG. 4, the automatic transfer device 120 includes an arm 121, a first rotating disk 122 and a second rotating disk 123 that are rotatably attached to the lower part of the arm 121. The first turntable 122 has at least two gripping means 125 and is rotated by a rotation shaft 126. Similarly, the second turntable 123 also has at least two gripping means 125 and is rotated by a rotation shaft 128. The gripping means 125 is composed of a pair of claw member arms 127 and 127, and the distance between the pair of claw members 127 and 127 is reduced to grip the molded product.
In the present embodiment, the arm 121 hangs down the first turntable 122 and the second turntable 123 between the first mold 10 and the second mold 70 so as to be vertically movable from above. The primary molded product 101 and the secondary molded product 102 are transferred. The automatic transfer device 120 has control means (not shown), and the control means synchronizes with the injection molding device W to move the arm 121 back and forth, right and left, up and down, and turn the rotation shafts 126 and 128. The driving of the gripping means 125 is controlled.

  The molding apparatus 1 has the above-described configuration, and as shown in FIG. 1, the movable mold 10 is attached and fixed to the movement side of the injection molding apparatus W, and the fixed mold 70 is attached and fixed to the fixed side. It has become. Since the mounting surfaces of the moving and fixed molds of the injection molding apparatus W are formed as opposed vertical surfaces, the surface (joint surface) 25 of each mounted moving mold 10 and the fixed mold 70 are fixed. The surface (joint surface) 77 is also opposed in a substantially vertical state, the primary mold 30 is positioned below the center, and the secondary mold 50 is positioned above the center.

FIG. 3 is a side sectional view showing a state during molding, and shows a state in which the joining surface 25 of the movable mold 10 and the joining surface 77 of the fixed mold 70 are brought into contact with each other.
As shown in FIG. 3, when the injection molding apparatus W is driven to join the joint surface 25 of the movable mold 10 to the joint surface 77 of the fixed mold 70, the movable primary molding recess 31 and the fixed primary molding recess 71. The primary molding die 30 is formed by overlapping the opening portions, and the secondary molding die 50 is formed by overlapping the opening portions of the moving side secondary molding concave portion 51 and the stationary side secondary molding concave portion 81. When the first synthetic resin material is injected from the injection unit (not shown) into the primary runner groove 32, the first synthetic resin material passes through the primary main runner groove 32a and the primary auxiliary runner groove 32b to form a primary mold. 30 and the protruding piece forming recess 40, the primary molded product 101 is formed by the primary forming die 30, the primary main runner 104 is formed by the primary main runner groove 32a, and the primary auxiliary runner 105 is formed by the primary auxiliary runner groove 32b. The protruding piece 106 is formed by the protruding piece forming recess 40. A guide hole 110 is formed in the protruding piece 106 by the forming protrusion 41 (first forming step).

  From the state shown in FIG. 3, the injection molding apparatus W is driven to move the moving mold 10 away from the fixed mold 70 and the pair of hydraulic cylinders 21 and 21 are driven to slide the slide table as shown in FIG. 16 is moved forward (fixed mold 70 side). The protruding pins 19 and 20 protrude forward from the inner surface of the mold by the movement of the slide base 16, and the primary molded product 101, the primary main runner 104, the primary auxiliary runner 105, and the projecting piece 106 are moved side primary molding concave portions 31. The primary main runner groove 32a, the primary auxiliary runner groove 32b, and the protruding piece forming recess 40 are extruded.

  At substantially the same time as moving the moving mold 10 away from the fixed mold 70, the control means of the automatic transfer device 120 moves the arm 121 between the moving mold 10 and the fixed mold 70 as shown in FIG. The primary main runner 104 of the primary molded product 101 pushed out by the projecting pins 19 and 20 is clamped by the pair of claw members 127 and 127 of the gripping means 125 of the single rotating disk 122.

  As shown in FIG. 6, the automatic transfer device 120 is controlled almost simultaneously with driving the pair of hydraulic cylinders 21 and 21 to move the slide base 16 backward and pulling the ejection pins 19 and 20 backward. The means rotates the first turntable 122 approximately 180 ° and then moves the arm 121 so that the first turntable 122 faces the moving-side secondary molding recess 51, and the arm 121 is further moved to the moving mold 10 side. And the guide hole 110 of the primary molded product 101 is engaged with the guide shaft 61. Next, the pair of claw members 127 and 127 of the gripping means 125 of the first rotating disk 122 are separated to release the clamping, and the arm 121 is moved forward. Here, the primary molded product 101 is caught by the guide shafts 61 and 61. The control means of the automatic transfer device 120 pulls the arm 121 back to a predetermined position from between the fixed mold 70 and the movable mold 10 (transfer process).

  After the transfer step, as shown in FIG. 3, when the injection molding apparatus W is driven and the moving mold 10 is brought close to the fixed mold 70 again, the tip end surface of the shaft portion 87 of the pressing pin 85 becomes the primary runner 103 and The surface of the projecting piece 106 is pressed toward the moving mold 10 side. Since the guide hole 110 of the projecting piece 106 is guided by the guide shaft 61, the primary main runner 104 accurately engages with the main runner engagement groove 52a, and the primary auxiliary runner 105 engages with the auxiliary runner engagement groove 52b. To do. Similarly, the protruding piece 106 is accurately engaged with the protruding piece engaging recess 60. In this way, the primary molded product 101 is accurately positioned in the moving side secondary molding recess 51. When the primary main runner 104 engages with the main runner engagement groove 52a, the primary auxiliary runner 105 engages with the auxiliary runner engagement groove 52b, and the protrusion 106 engages with the protrusion engagement recess 60, the pressing pin 85 Is immersed in the guide hole 78 of the fixed mold 70 against the elasticity of the elastic member 86. The guide shaft 61 is inserted into the insertion hole 76 of the fixed mold 70. When the joining surface 25 of the movable mold 10 is joined to the joining surface 77 of the fixed mold 70, as described above, the primary molding die 30 and the secondary molding die 50 in which the respective openings are joined to face each other are formed. The primary molding 101 is firmly fixed to a predetermined position in the secondary molding die 50 by the primary runner 103 (insertion process).

As described above, when the first synthetic resin material is injected from the injection unit into the primary runner groove 32, the primary molded product 101, the primary main runner 104, the primary auxiliary runner 105, and the protruding piece 106 are molded. When the second synthetic resin material is injected from the injection unit into the secondary runner groove 82, the second synthetic resin material is divided into the secondary main runner groove 82a and the secondary auxiliary runner groove 82b.
And flows into the secondary mold 50. In this way, as shown in FIG. 3, the secondary molded product 102 and the secondary runner 108 in the form of wrapping the primary molded product 101 are molded (second molding process).

  Next, when the injection molding apparatus W is driven to move the movable mold 10 away from the fixed mold 70 as shown in FIG. 4 and the pair of hydraulic cylinders 21 and 21 are driven to move the slide base 16 forward. The projecting pins 19 and 20 project forward, and the primary molded product 101, the primary main runner 104, the primary auxiliary runner 105, and the projecting piece 106 are moved to the moving side primary molding recess 31, the primary main runner groove 32a, the primary auxiliary runner groove 32b, and Extrude from the projecting piece forming recess 40. Moreover, the secondary molded product 102, the primary main runner 104, the primary auxiliary runner 105, and the projecting piece 106 are moved by the projecting pins 19 and 20 to the moving side secondary molding concave portion 51, the main runner engagement groove 52a, and the auxiliary runner engagement groove. It pushes out from 52b and the protrusion engaging recess 60. FIG.

  As shown in FIG. 5, substantially simultaneously with moving the movable mold 10 away from the fixed mold 70, the control means of the automatic transfer device 120 moves the arm 121 between the movable mold 10 and the fixed mold 70, The primary main runner 104 of the primary molded product 101 pushed out by the projecting pins 19 and 20 is sandwiched by the pair of claw members 127 and 127 of the gripping means 125 of the first rotary disk 122, and the gripping means of the second rotary disk 123 The primary main runner 104 of the secondary molded product 102 pushed out by the protruding pins 19 and 20 is clamped by the 125 pairs of claw member arms 127 and 127.

  As shown in FIG. 6, the automatic transfer device 120 is controlled almost simultaneously with driving the pair of hydraulic cylinders 21 and 21 to move the slide base 16 backward and pulling the ejection pins 19 and 20 backward. The means rotates the first turntable 122 approximately 180 ° and then moves the arm 121 so that the first turntable 122 faces the moving-side secondary molding recess 51, and the arm 121 is further moved to the moving mold 10 side. And the guide hole 110 of the primary molded product 101 is engaged with the guide shaft 61, the pair of claw members 127 and 127 of the gripping means 125 of the first rotating disk 122 are separated from each other, and the clamping is released. 121 is moved forward. At this time, the primary molded product 101 is caught by the guide shafts 61 and 61. Note that the gripping means 125 of the second turntable 123 still holds the primary main runner 104 of the secondary molded product 102. When the control unit of the automatic transfer device 120 pulls the arm 121 back to a predetermined position from between the fixed mold 70 and the movable mold 10 and releases the gripping means 125 of the second rotating disk 123, the secondary molded product 102 is released. Falls at that position. A collection box for the secondary molded product 102 may be placed at the dropping position.

  In the above embodiment, the guide hole 110 is formed in the projecting piece 106 of the primary molded product 101, but the guide hole may be formed in the primary runner 103. Moreover, in the said embodiment, although the shaping | molding protrusion 41 was formed in the circular-axis shape, as shown to Fig.13 (a), you may form in a truncated cone shape. Further, when forming in this way, an inverted trapezoidal recess 42 may be formed around the molding protrusion 41 in order to increase the thickness of the guide hole 110 formed by the molding protrusion 41. Moreover, in the said embodiment, although the shaping | molding protrusion 41 was directly formed in the surface 25 of the movement mold 10, as shown in FIG.13 (b), the shaping | molding axis | shaft 43 in which the front-end | tip part 44 was formed in the shape of a truncated cone is shown. It may be installed in the moving mold 10.

Further, the molding shaft 43 may be urged toward the fixed mold 70 by the elastic member 47 as shown in FIG. The forming shaft 43 includes a shaft portion 48 and a flange portion 49. The moving mold 10 is formed with a guide hole 37 for guiding the shaft portion 48 in the front-rear direction and a storage chamber 38 for storing the flange portion 49. Since the diameter of the guide hole 37 is smaller than the diameter of the flange portion 49, only the shaft portion 48 can project from the guide hole 37 to the joining surface 25 of the movable mold 10. A coil spring-like elastic member 47 is provided in the storage chamber 38 so as to be inserted between the rear wall 38 a of the storage chamber 38 and the flange portion 49. The molding shaft 43 is urged forward (on the fixed mold 70 side) by the elastic member 47, the shaft portion 48 protrudes from the joining surface 25 of the movable mold 10, and the flange portion 49 is the front wall of the storage chamber 38. 38b is press-fitted and engaged. When the movable mold 10 and the fixed mold 70 are joined, the molding shaft 43 is pushed into the movable mold side by the fixed mold 70 against the elasticity of the elastic member 47, and the tip 44 is in the projecting piece molding recess 40. Thus, the forming projection 41 is formed.

In the above embodiment, the outer diameter D of the guide shaft 61 and the inner diameter of the guide hole 110 are formed to be substantially the same. However, as shown in FIG. The outer diameter D of the guide shaft 61 is reduced from the opening 111 on the movable mold 10 side toward the opening 112 on the fixed mold 70 side, and the inner diameter d2 of the opening 112 on the fixed mold 70 side of the guide hole 110 is formed. And the inner diameter d1 of the opening 111 on the movable mold 10 side, and the outer diameter D of the tip 64 of the guide shaft 61 is inclined so as to become narrower toward the fixed mold 70 side. Also good.
14B, the tip 64 of the guide shaft 61 can be easily inserted into the guide hole 110 as shown in FIG. 14B. However, the inner diameter d2 of the opening 112 on the fixed mold 70 side of the guide hole 110 Since the outer diameter D of the guide shaft 61 is larger, when the primary molded product 101 is transferred to the secondary molding die 50 by the automatic transfer device 120, the guide hole 110 is caught by the tip portion 64 of the guide shaft 61. Become.

  As shown in FIG. 14C, when the movable mold 10 and the fixed mold 70 are joined, the pressing pin 85 pushes the primary runner 103 toward the movable mold 10 side. Since the inner diameter d2 of the opening 112 on the second mold 70 side is smaller than the outer diameter D of the guide shaft 61, the guide hole 110 is in sliding contact with the guide shaft 61 while being slightly expanded. Thus, since there is no gap between the guide hole 110 and the guide shaft 61, the primary molded product 101 is pushed into the secondary molding die 50 while being reliably positioned. As shown in FIG. 14C, the guide hole 110 is expanded, so that the projecting piece 106 or the primary runner 103 tends to be deformed, but the deformation of the projecting piece 106 and the primary runner 103 is suppressed by the pressing pin 85. Since the primary runner 103 and the projecting piece 106 can be reliably engaged with the runner engaging groove 52 and the projecting piece engaging recess 60 by pressing the pressing pin 85, the pressing pin 85 is attached to the fixed mold 70. Although it is desirable that the primary runner 103 and the projecting piece 106 are engaged with the runner engaging groove 52 and the projecting piece engaging recess 60 by the joint surface 25 of the movable mold 10 even if the pressing pin 85 is not present. It is also possible to make it.

  In the embodiment described above, the guide shaft 61 is implanted (fixed by press-fitting) in the movable mold 10, but as shown in FIG. It may be provided as follows. The guide shaft 61 includes a shaft portion 65 and a flange portion 66. The movable mold 10 is formed with a guide hole 45 for guiding the shaft portion 65 in the front-rear direction and a storage chamber 46 for storing the flange portion 66. Since the diameter of the guide hole 45 is smaller than the diameter of the flange portion 66, only the shaft portion 65 of the guide shaft 61 can protrude from the joint surface 25 of the movable mold 10. A coil spring-like elastic member 62 is provided in the storage chamber 46 so as to be inserted between the rear wall 46 a of the storage chamber 46 and the flange portion 66. The guide shaft 61 is urged forward (on the fixed mold 70 side) by the elastic member 62, the shaft portion 65 protrudes from the joint surface 25 of the movable mold 10, and the flange portion 66 is the front wall of the storage chamber 46. It is press-fitting to 46b. The guide shaft 61 resists the elasticity of the elastic member 62 when the guide hole 110 of the primary molded product 101 is hooked on the tip 64 thereof by the automatic transfer device 120 and the movable mold 10 and the fixed mold 70 are joined. Thus, the primary runner 103 and the projecting piece 106 can be engaged with the runner engaging groove 52 and the projecting piece engaging recess 60 by being pushed into the moving mold 10 by the fixed mold 70.

Further, as shown in FIGS. 17 to 21, in order to form a plate-like gripping piece 107 projecting toward the moving mold side on the protruding piece 106, a gripping molding recess 73 serving as a molding die in the fixed mold 70. And an insertion recess 75 into which the grip piece 107 molded by the grip molding recess 73 is inserted during the secondary molding may be formed. In this way, the automatic transfer device 120 of the molded product allows the pair of claw member arms 127 and 127 of the gripping means 125 to grip the primary runner 103 without
This is convenient because the grip piece 107 can be gripped and transferred.
The secondary runner 108 formed by the primary runner 103 and the secondary runner groove 82 has a substantially trapezoidal cross section as shown in FIG. 12, and the upper surface (joint surface side of the mold) is flat. Therefore, compared with a runner having a circular cross section, the entire surface can be pressed by the pressing pin 85, and the runner engaging groove 52 is surely pushed and engaged without deformation.

  The molding apparatus 1 includes a primary molding recess 91 that molds a primary molding 101 in a primary molding die 30, a primary runner groove 32 that flows a resin material into the primary molding recess 91, and a primary runner 103 that is molded by the primary runner groove 32. A forming projection 41 for forming the guide hole 110 is formed in the upper portion. In addition, the molding apparatus 1 includes a secondary molding recess 92 that molds the secondary molding 102 in a form in which the primary molding 101 is wrapped in the secondary molding die 50, and a runner engagement groove 52 that engages the primary runner 103. A guide shaft 61 is formed which is inserted into the guide hole 110 of the primary runner 103, guides the primary molded product 101 to the secondary molding recess 92, and guides the primary runner 103 to the runner engagement groove 52. The molding apparatus 1 is configured such that the automatic transfer device 120 can be used, and there is no need to incorporate transfer means such as a rotary table. Since the molding apparatus 1 does not need to incorporate a transfer means, the number of parts is reduced and the cost is low, the structure is simple and the assembly is easy, and the conveyance and storage are convenient due to the miniaturization and weight reduction. Attachment to the device W can be easily performed.

  The forming apparatus 1 includes a protruding piece forming recess 40 for forming a protruding piece 106 connected to the primary runner 103 formed by the primary runner groove 32 in the primary forming die 30, and a guide hole 110 in the protruding piece 106. A molding projection 41 to be molded is formed, and the secondary molding die 50 is inserted into a projecting piece engaging recess 60 for engaging the projecting piece 106 and the guide hole 110 of the projecting piece 106, and the primary molded product When a guide shaft 61 is formed for guiding 101 to the secondary forming recess 92, guiding the primary runner 103 to the runner engaging groove 52, and guiding the projecting piece 106 to the projecting piece engaging recess 60. The guide hole 110 is not formed in the primary runner 103.

  In the molding apparatus 1, a grip molding recess 73 for molding the grip piece 107 on the protruding piece 106 is formed in the primary molding die 30, and an insertion recess 75 for inserting the grip piece 107 in the secondary molding die 50. Therefore, the grip piece 107 can be formed on the primary molded product 101, and the primary molded product 101 can be easily transferred to the secondary mold 50 by gripping the grip piece 107.

  When the molding apparatus 1 joins the second mold 70 to the first mold 10, at least one of the primary runner 103 and the primary molded product 101 guided by the guide shaft 61 is transferred to the first mold 10. Since the pressing pin 85 to be pushed into the mold 10 is provided, the primary molded product 101 can be reliably pushed into the secondary molding recess 92 and the primary runner 103 can be pushed into the runner engagement groove 52.

  In the molding apparatus 1, the molding protrusion 41 is formed in a truncated cone shape, and the inner diameter of the guide hole 110 decreases from the opening 111 on the first mold 10 side toward the opening 112 on the second mold 70 side. Therefore, the guide shaft 61 can be surely inserted into the guide hole 110.

The molding apparatus 1 is formed so that the outer diameter D of the guide shaft 61 is in the range of the inner diameter d2 of the opening 112 on the second mold 70 side of the guide hole 110 and the inner diameter d1 of the opening 111 on the first mold 10 side. In addition, since the outer diameter D of the tip portion is inclined so as to become smaller toward the second mold 70 side, the guide shaft 61 can be reliably inserted into the guide hole 110, and the guide Since the outer diameter D of the shaft 61 is larger than the inner diameter d2 of the opening 112 on the second mold 70 side of the guide hole 110, the guide shaft 61 can be guided in such a manner as to be press-fitted into the guide hole 110, and primary molding is surely performed. While positioning the object 101 and the primary runner 103, the secondary molding recess 92 and the runner engagement groove 52 can be guided.

The molding method includes the first molding step of molding the primary molding 101 having the runner 103 having the guide holes 110 in the primary molding die 30 and the primary molding 101 molded in the first molding step. Is transferred to the secondary mold 50, and the transfer step of engaging the guide hole 110 of the runner 103 with the guide shaft 61 of the secondary mold 50, and the joining of the first mold 10 and the second mold 70 are performed. Therefore, the primary molding 101 is inserted into the secondary molding die 50 while being guided by the guide shaft 61, and in the secondary molding die 50, the primary molding 101 is insert-molded to form the secondary molding 102. And a second molding step for molding. According to this molding method, the automatic transfer device can be used, the number of parts of the molding device is reduced, the structure is simplified, and the cost, size, weight and assembly are facilitated. It is possible to make the transportation and storage convenient, and the attachment to the injection molding apparatus W can be simplified.

  In the molding method, the primary molded product 101 having the runner 103 on which the projecting piece 106 having the guide hole 110 is formed is molded in the first molding step. Therefore, the guide hole 110 can be formed in the runner 103. Disappear.

  A molded product 100 molded by the molding apparatus 1 includes a model object 102, a runner 103 connecting the model object 102 in a substantially horizontal direction, and a guide hole 110 formed in the runner 103 in a substantially vertical direction. Therefore, at the time of molding by the multicolor molding apparatus, the primary molded product 101 can be guided to the secondary molding die 50 using this guide hole 110, which can contribute to simplification of the structure of the molding apparatus, and can be boxed. At this time, the guide hole 110 can be engaged with the protrusion in the box and stored in the box without rattling.

  Further, in the molded product 100, the projecting piece 106 is formed integrally with the runner 103, and the guide hole 110 is formed in the projecting piece 106 in the substantially vertical direction, so that it is not necessary to form the guide hole 110 in the runner 103. . In the molded product 100, since the grip piece 107 protruding substantially in the vertical direction is formed on the projecting piece 106 or the runner 103, the primary molded product 101 is gripped by the grip piece 107 during molding by the multicolor molding apparatus. Can be reliably transferred from the primary mold 30 to the secondary mold 50.

  Since the inner peripheral surface of the molded product 100 is inclined so that the inner diameter of the guide hole 110 becomes narrower from one opening 111 toward the other opening 112, the molded product 100 is inserted into the guide shaft 61 during multicolor molding. In addition, it is easy to engage the guide hole 110 with the protrusion in the box when packing the box.

In the molding apparatus described above, the moving mold 10 having the protruding pins 19 and 20 is fixed on the moving side of the injection molding apparatus W, and the pressing pin 85 is provided on the fixing side of the injection molding apparatus W. The mold 70 is fixed. However, the arrangement of the respective molds is reversed, a mold having the same configuration as that of the fixed mold 70 is fixed to the moving side of the injection molding apparatus W, and the moving mold 10 is fixed to the fixed side of the injection molding apparatus W. A mold having the same configuration may be fixed, and a molding apparatus having this configuration also belongs to the technical scope of the present invention. When the arrangement of the molds is changed, the direction of the gripping means 125 of the automatic transfer device 120 is opposite to that of the previous embodiment, and the direction of the mold provided with the protruding pins 19 and 20 is directed. become.
The primary molded product and the secondary molded product injection-molded by the molding apparatus 1 are gripped by the gripping means 125 of the automatic transfer device 120. As described above, the automatic transfer device 120 is connected to the molding device 1. Although synchronized, it is a separate device. Therefore, even if the shape of the molding die of the molding apparatus 1 is different, it is not necessary to change the automatic transfer device 120. In the present invention, when the shape and position of the primary main runner 104 and the gripping piece 107 of the primary molded product to be gripped by the automatic transfer device 120 are made common, a molded product of another shape is formed. Even when the molding apparatus 1 is replaced as described above, it is not necessary to change the control program for controlling the structure and operation of the automatic transfer apparatus 120 each time. As a result, it is possible to quickly perform various operations such as exchanging the mold attached to the injection molding apparatus and changing the content of drive control associated with exchanging the mold.

It is a perspective view which shows the use condition of a shaping | molding apparatus. It is side surface sectional drawing which shows one embodiment of the shaping | molding apparatus which concerns on this invention. It is side surface sectional drawing which shows the state at the time of shaping | molding of the shaping | molding apparatus of FIG. It is side surface sectional drawing which shows the state before conveying the molding of the shaping | molding apparatus of FIG. It is side surface sectional drawing which shows the state which has transferred the molding of the shaping | molding apparatus of FIG. It is side surface sectional drawing which shows the state after conveying the molding of the shaping | molding apparatus of FIG. It is the surface (joining surface) figure of the 1st metal mold | die (moving metal mold | die) of the shaping | molding apparatus of FIG. It is the surface (joining surface) figure of the 2nd metal mold | die (fixed metal mold | die) of the shaping | molding apparatus of FIG. It is principal part sectional drawing of the shaping | molding apparatus of FIG. It is a front view of the primary molded object shape | molded by the shaping | molding apparatus of FIG. It is a front view of the secondary molded object shape | molded by the shaping | molding apparatus of FIG. It is principal part sectional drawing of the secondary molded product of FIG. It is sectional drawing which shows the other form of the shaping | molding protrusion of a shaping | molding apparatus. It is explanatory drawing explaining a motion of a guide shaft and a press pin. It is explanatory drawing explaining the motion of the guide shaft of another form. It is explanatory drawing explaining the motion of the shaping | molding protrusion of another form. It is side surface sectional drawing which shows other embodiment of the shaping | molding apparatus which concerns on this invention. It is side surface sectional drawing which shows the state before conveying the molding of the shaping | molding apparatus of FIG. It is side surface sectional drawing which shows the state which has transferred the molding of the shaping | molding apparatus of FIG. It is the surface (joining surface) figure of the 2nd metal mold | die (fixed metal mold | die) of the shaping | molding apparatus of FIG. It is a front view of the primary molded object shape | molded by the shaping | molding apparatus of FIG.

Explanation of symbols

W injection molding apparatus D outer diameter d1 inner diameter d2 inner diameter 1 molding apparatus 10 moving mold (first mold)
DESCRIPTION OF SYMBOLS 11 Mold base 12 Base 13 Block body 15 Empty room 16 Sliding base 19 Extrusion pin 20 Extrusion pin 21 Hydraulic cylinder 22 Drive shaft 25 Surface (joint surface)
30 Primary mold 31 Moving side primary molding recess 32 Primary runner groove 32a Primary main runner groove 32b Primary auxiliary runner groove 35 Through hole (for runner ejection pin)
36 Through-hole (for molded product ejection pin)
37 Guide hole 38 Storage chamber 38a Rear wall 38b Front wall 40 Projection piece forming recess 41 Molding projection 42 Recess 43 Molding shaft 44 Tip portion 45 Guide hole 46 Storage chamber 46a Rear wall 46b Front wall 47 Elastic member 48 Shaft portion 49 Flange portion 50 Secondary mold 51 Moving-side secondary molding recess 52 Runner engagement groove 52a Main runner engagement groove 52b Auxiliary runner engagement groove 60 Projection piece engagement recess 61 Guide shaft 62 Elastic member 63 Mounting hole 64 Tip 65 Shaft 66 Flange 70 fixed mold (second mold)
71 Fixed-side primary molding recess 73 Grip molding recess 75 Insertion recess 76 Insertion hole 77 Surface (joint surface)
78 Guide hole 79 Storage chamber 79a Front wall 79b Rear wall 81 Fixed side secondary forming recess 82 Secondary runner groove 82a Secondary main runner groove 82b Secondary auxiliary runner groove 85 Press pin 86 Elastic member 87 Shaft 88 Flange 91 Primary Molded recess 92 Secondary molded recess 100 Molded product 101 Primary molded product 102 Secondary molded product (model)
103 primary runner 104 primary main runner 105 primary auxiliary runner 106 projecting piece 107 gripping piece 108 secondary runner 110 guide hole 111 opening on the first mold side 112 opening on the second mold side 120 automatic transfer device (transfer means)
121 Arm 122 First rotating disk 123 Second rotating disk 125 Holding means 126 Rotating shaft 127 Claw member 128 Rotating shaft

Claims (19)

A molding apparatus comprising a first mold and a second mold, wherein a primary mold and a secondary mold are formed by joining the first mold and the second mold. ,
The primary molding die has a primary molding recess for molding a primary molded product, a primary runner groove for pouring a resin material into the primary molding recess, and a molding protrusion for molding a guide hole in the primary runner molded by the primary runner groove. Formed,
The secondary molding die includes a secondary molding recess that molds the secondary molding in a form that encloses the primary molding, a runner engagement groove that engages the primary runner, and the guide hole of the primary runner. A molding device is formed, wherein a guide shaft for guiding the primary molded product to the secondary molding recess and guiding the primary runner to the runner engagement groove is formed. A molding apparatus comprising a first mold and a second mold, wherein a primary mold and a secondary mold are formed by joining the first mold and the second mold. ,
The primary molding die is molded with a primary molding recess for molding a primary molded product, a primary runner groove for pouring a resin material into the primary molding recess, and a projecting piece connected to the primary runner formed by the primary runner groove. A projection forming concave portion to be formed, and a forming projection for forming a guide hole in the protrusion are formed,
The secondary molding die is engaged with a secondary molding recess for molding the secondary molding in a form of wrapping the primary molding, a runner engagement groove for engaging the primary runner, and the protruding piece. A projecting piece engaging recess, and inserting into the guide hole of the projecting piece, guiding the primary molding to the secondary forming recess, guiding the primary runner to the runner engaging groove, and A molding apparatus characterized in that a guide shaft is formed to guide the projecting piece engaging recess. The primary mold is formed with a grip molding recess for molding a grip piece on the protruding piece,
The molding apparatus according to claim 2, wherein an insertion recess for inserting the gripping piece is formed in the secondary molding die. The molding apparatus according to claim 1, wherein the primary runner groove, the molding protrusion, the runner engagement groove, and the guide shaft are formed in a first mold.   The primary runner groove, the protruding piece forming recess, the forming protrusion, the runner engaging groove, the protruding piece engaging recess, and the guide shaft are formed in a first mold. 2. The molding apparatus according to 2. The molding apparatus according to claim 3, wherein the grip molding recess and the insertion recess are formed in a second mold.   The second mold includes a pressing pin that pushes at least one of the primary runner guided by the guide shaft and the primary molded product into the first mold side when the first mold is joined. The molding apparatus according to claim 1, wherein the molding apparatus is provided.   The molding apparatus according to claim 7, wherein the pressing pin is movably provided in the second mold and is urged toward the first mold by an elastic member.   The molding according to any one of claims 1 to 8, wherein an insertion hole for inserting the guide shaft provided in the first mold is formed in the second mold. apparatus.   The said guide shaft is provided in the said 1st metal mold | die so that a movement is possible, and is urged | biased by the elastic member toward the said 2nd metal mold | die. The molding apparatus as described.   The molding protrusion is formed in a truncated cone shape, and the guide hole is molded so that an inner diameter decreases from an opening on the first mold side toward an opening on the second mold side. The molding apparatus according to claim 1.   The guide shaft has an outer diameter in a range between an inner diameter of the opening on the second mold side of the guide hole and an inner diameter of the opening on the first mold side, and the outer diameter of the tip portion is the second mold. The molding apparatus according to claim 11, wherein the molding apparatus is inclined so as to become smaller toward the side. Forming a molded product of a molding apparatus comprising a first mold and a second mold, wherein a primary mold and a secondary mold are formed by joining the first mold and the second mold. A molding method for
In the primary molding die, a first molding step of molding a primary molded product having a runner having a guide hole;
A transfer step of transferring the primary molded product formed in the first forming step to the secondary forming die, and engaging the guide hole of the runner with the guide shaft of the secondary forming die;
An insertion step of inserting the primary molded product into the secondary mold while guiding the primary molded product by the guide shaft by joining the first mold and the second mold;
A molding method comprising: a second molding step in which the primary molding is insert-molded to mold the secondary molding in the secondary molding die. Forming a molded product of a molding apparatus comprising a first mold and a second mold, wherein a primary mold and a secondary mold are formed by joining the first mold and the second mold. A molding method for
In the primary molding die, a first molding step of molding a primary molding having a runner in which a projecting piece having a guide hole is formed;
A transfer step of transferring the primary molded product molded in the first molding step to the secondary molding die, and engaging the guide hole of the projecting piece with the guide shaft of the secondary molding die;
An insertion step of inserting the primary molded product into the secondary mold while guiding the primary molded product by the guide shaft by joining the first mold and the second mold;
A molding method comprising: a second molding step in which the primary molding is insert-molded to mold the secondary molding in the secondary molding die. A molded article molded by the molding apparatus according to claim 1,
With a model,
A runner connecting the model objects in a substantially horizontal direction;
A molded product comprising guide holes formed in the runner in a substantially vertical direction. A molded product molded by the molding apparatus according to claim 2,
With a model,
A runner connecting the model objects in a substantially horizontal direction;
A projecting piece formed integrally with the runner;
A molded product comprising guide holes formed in the projecting piece in a substantially vertical direction. A molded article molded by the molding apparatus according to claim 3,
With a model,
A runner connecting the model objects in a substantially horizontal direction;
A projecting piece formed integrally with the runner;
It consists of a guide hole formed in the protrusion in a substantially vertical direction,
A molded article characterized in that a gripping piece is formed on the protruding piece so as to protrude in a substantially vertical direction. A molded product molded by the molding apparatus according to claim 11,
With a model,
A runner connecting the model objects in a substantially horizontal direction;
It consists of a guide hole formed in the runner in a substantially vertical direction,
The molded article characterized in that the guide hole has an inner peripheral surface inclined so that an inner diameter becomes narrower from one opening toward the other opening. The molded article according to any one of claims 15 to 18, wherein the runner has a substantially square cross section.

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