JP2754757B2 - Composite simultaneous molding die and method of molding composite material using the die - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite simultaneous molding die and a method of molding a composite material using the composite die. The present invention relates to a mold for integrally molding a synthetic resin projection with a composite material having a so-called sandwich structure in which a synthetic resin layer is filled between face plates, and a method for molding a sandwich composite material using the mold.

[Related Art] Conventionally, a composite material in which a synthetic resin layer is formed between two metal plates is manufactured by, for example, bonding both surfaces of a synthetic resin formed into a plate shape by extrusion to a metal plate with an adhesive. .
The composite material manufactured by such a method is called a sandwich steel plate, and its structure is simply a resin layer formed between metal plates, is a flat plate material, and has a shape such as bending or drawing. It does not make up.

Therefore, the inventors of the present invention have proposed methods of producing composite materials of various shapes by combining sheet metal pressing and resin injection molding (Japanese Patent Application Nos. 61-224223 and 62-223). 2113
No. 22). Specifically, a pair of punches for press working,
A metal plate to be formed is placed in a state where two metal plates are stacked between a movable die having an uneven portion such as a die and a fixed die, and the die is clamped by moving the movable die. Do
Then, while holding the metal plate one by one in each die, the movable die is moved in the mold release direction to form a cavity having a predetermined width between the two metal plates or a cavity outside the metal plate through a hole formed by pressing. Then, a molten resin is injected and injected into the cavity to form a resin layer. Then, after the resin layer is solidified, the composite material molded product is taken out.
Further, as another method of manufacturing a composite material, the present inventors perform press working simultaneously in a state where two molded sheets are separated, and form a resin layer between the pressed molded sheets in the separated state. In addition to proposing a forming method, a mold for molding was proposed (Japanese Patent Application No. 63-11873). This molding die
As shown in FIG. 18, a fixed mold body a and a movable mold body b which face each other so as to be able to come and go and cooperate with each other to form a cavity portion f in a mold clamping state in which they come into contact with each other. When,
An intermediate mold c is provided between the fixed and movable molds a and b so as to be able to advance and retreat, and can be simultaneously clamped in cooperation with the fixed and movable molds a and b. On the opposing surfaces of the fixed mold body a and the intermediate mold body c and the movable mold body b and the intermediate mold body c, a pair of concave and convex surface portions d and d for forming a pair are formed. a and a movable portion b of the movable mold body b are provided with an advanceable / retractable holding portion e for holding each press-formed plate, and the uneven surface portions of the fixed mold body a and the movable mold body b are provided. d or d (fixed mold)
A punch k provided with a recess i at the tip end surface thereof, a die k is formed on an uneven surface d of the intermediate mold c opposed to the punch j, and a cavity f is formed.
An injection passage g (in this case, provided in the punching and sprue h) for injecting the molten resin is provided.

In order to mold a composite material having a sandwich structure using the mold configured as described above, first, as shown in FIGS. 19 (a) to (e), a fixed mold body a, a movable mold body b and the intermediate mold body c are set to face each other, and then formed between the fixed mold body a and the intermediate mold body c and between the movable mold body b and the intermediate mold body c. Plates l, l are arranged. In this state, the fixed mold body a, the movable mold body b, and the intermediate mold body c
(See FIG. 19 (b) and FIG. 20), and then hold the pressed plates l, l. While the fixed mold body a and the movable mold body b are separated from each other, the intermediate mold body c is moved backward from the fixed and movable mold bodies a and b, and the fixed mold body a and the movable mold body are moved. The molten resin is injected and filled into the cavity f formed by the mold clamping with the mold b, and the synthetic resin core material layer m is filled between the molding plates l and l and the recess i of the punch j. Thereafter, the mold is opened to take out the composite material n.

[Problems to be Solved by the Invention] However, as shown in FIG. 21 and FIG.
A gap p is formed between the portion where the hole is punched by the punch j and the protrusion o made of synthetic resin, and the synthetic resin layer m is exposed to cause not only the deterioration of the quality of the composite material n but also the strength. There is a problem that causes a decrease in In order to solve this problem, a method of filling the gap p with a sealing material or the like is conceivable, but the operation becomes troublesome. In addition, the gap p
Therefore, there are also inconveniences such as processing of another shape (for example, another protrusion or a through hole, etc.) in the vicinity of the synthetic resin protrusion o becomes difficult, and the shape is restricted.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to perform simultaneous press working in a state where a pair of metal plates are separated, and to perform pressing between the two molded plates in the separated state. The present invention provides a composite simultaneous molding die capable of forming a composite material in which a synthetic resin projection is integrally formed with a core material layer by filling and injecting a synthetic resin layer into the composite material layer. To make it easier,
It is an object of the present invention to provide a method of forming a composite material which can improve the quality of a composite material product.

[Means for Solving the Problems] In order to achieve the above object, the composite simultaneous molding die of the present invention opposes each other so as to be able to approach and separate from each other, and cooperates with the opposing surfaces in the abutted mold clamping state. A first mold body and a second mold body that form a cavity portion by being formed, and are disposed between the first mold body and the second mold body so as to be able to advance and retreat, and the first mold body and the second mold body. A main part is constituted by a third mold body capable of simultaneous mold clamping in cooperation with the body, and the first mold body, the third mold body, the second mold body, and the third mold body A pair of concave and convex portions for press working are formed on the opposing surfaces of the mold body, and each of the pressed plates is formed on the concave and convex surface portions of the first mold body and the second mold body. A retractable holding portion for holding is provided, and the concave and convex surface portion of one of the first mold body and the second mold body moves toward and away from the cavity portion. In addition to providing an existing punch, a punching means is connected to an expansion / contraction moving means which performs a switching operation at the time of press working or cavity formation, and an injection passage for injecting the molten resin into the cavity is formed. It consists of

Further, according to the method of molding a composite material of the present invention, after preparing the first, second and third molds, the first mold, the third mold and the second mold are provided. A first step of disposing a plate to be molded between the mold and the third mold, and a step of extending the first, second and third molds while the punch is extended. A second step of pressing the molded plate by performing simultaneous mold clamping; and separating the first and second mold bodies while holding the pressed molded plate after the second step. A third step of retreating the third mold body from between the first and second mold bodies in a state where the first punch is contracted and moving the punching punch. A fourth step of injecting and filling a molten resin into a cavity portion formed by clamping with the mold body of No. 2 to form a synthetic resin layer between both molding plates; There are those comprising a fifth step of taking out a composite material having a synthetic resin protrusions by clamping release of the first mold body and a second mold body after solidification.

In the composite simultaneous molding die of the present invention, provided that a predetermined press working is performed on the concave and convex surface portions of the first and second die bodies and the concave and convex surface portion of the third die body, The uneven surface portion may be set to any shape.

The molded plate holding portions of the first and second mold bodies may be of any structure as long as they can move forward and backward, but are preferably formed so as to be able to move forward and backward through moving means.

In addition, as long as the injection passage is capable of injecting a molten resin into a cavity formed at the time of clamping the first mold body and the second mold body, the first or second mold is used. It may be a punch and a sprue provided on the uneven surface of the body, or may be a side gate type in which molten resin is injected from the joint side of the first and second mold bodies.

On the other hand, in the method of molding a composite material of the present invention, the form and number of the synthetic resin projections are arbitrary as long as the synthetic resin projections are formed at least, and the synthetic resin projections and the through holes are simultaneously molded. Is also possible.

[Operation] The above technical means works as follows.

Simultaneous mold clamping of the first, second, and third mold bodies configured as described above, with the molded body placed between the mold bodies. As a result, a predetermined press working is performed along the uneven surface of the plate to be formed.
After the press working or the like is performed, after the mold clamping is released and the third mold body retreats, the inside of the cavity formed by the mold clamping of the first mold body and the second mold body is performed. Is filled with a molten synthetic resin, thereby forming a composite material having a projection integral with the synthetic resin core layer.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

First Embodiment FIG. 1 is a sectional view of a first embodiment of a mold according to the present invention.

The mold according to the present invention includes a first mold body 10 (hereinafter, referred to as a fixed mold body) and a second mold body 20 (hereinafter, referred to as a fixed mold body 10) which is detachable from the fixed mold body 10. A movable mold body)
A third mold body 30 (hereinafter referred to as a third mold body 30) which is disposed between the fixed and movable mold bodies 10 and 20 so as to be able to advance and retreat and cooperates with the fixed and movable mold bodies 10 and 20 to perform simultaneous mold clamping. The main part is constituted by an intermediate mold).

The fixed and movable mold bodies 10 and 20 cooperate with opposing surfaces in a mold clamped state in contact with each other to form a cavity portion 40, which will be described later. On the opposing surfaces of the intermediate mold body 10, 10, 20 and the intermediate mold body 30, a pair of concave and convex surface portions 42, 42; 42, 42 for press working are formed, respectively. At this time, each of the corrugated plates 44,
Holding portions 43, 43 for holding the 44 are formed, and the holding portions 43, 43 are formed by knockouts that can advance and retreat with respect to the fixed and movable mold bodies 10, 20, respectively. That is,
The holding part 43 is provided with a piston part 43a which is slidably fitted in an expansion chamber 48 of a narrow opening part 46 formed on the opposing surface of the fixed and movable mold bodies 10, 20, so that the fixed mold is provided. It is formed so as to be able to advance and retreat with respect to the body 10 or the movable mold body 20, respectively. In this case, as the piston rod 49a of the cylinder 49 expands and contracts, the knockout 43 moves forward and backward by a gap 47 between the knockout 43 and the punch plate 45.

A punch punch and sprue 11 that is capable of appearing and retracting as the holding portion 43 advances and retreats is provided on the uneven surface portion 42 of the fixed mold body 10. The punch and sprue 11 has a shearing edge at the tip and an injection passage 12 for guiding the molten resin into the cavity 40 at the center thereof. In addition, the punch 50 is provided on the concave-convex surface portion 42 of the fixed mold body 10 so as to be able to protrude and retract toward the cavity 40 with the advance / retreat of the knockout 43. The back is connected to a hydraulic cylinder 60, a piston rod 61, which is a telescopic moving means. The hydraulic cylinder 60 can be switched at the time of press working or at the time of forming a cavity portion, that is, at the time of press working, the piston rod 61 is extended to punch a hole in the plate 44 to be formed, and At the time of forming the portion, the piston rod 61 is contracted to form a projection recess 62 in a part of the cavity portion 40.

On the other hand, a die 31 of a punch and a sprue 11 is provided on the concave / convex surface portion 42 of the intermediate die body 30 facing the fixed die body 10, and a die is provided on the concave / convex surface portion 42 opposed to the punch 50. 32 are provided. The dies 31 and 32 are communicated with a punching chip removal passage 34 provided at the center of the intermediate mold body 30. Around the main body 30a of the intermediate mold body 30, a first stripper plate 36 is provided on the fixed mold body 10 side.
However, a second stripper plate 37 is provided on the movable mold body 20 side, and springs (not shown) are respectively provided in gaps 30b, 30b between the stripper plates 36, 37 and the intermediate mold body 30a. Are arranged.

Next, a procedure for molding a composite material using the mold of the present invention configured as described above will be described with reference to FIGS. 2 (a) to 2 (e).

* First step First, after preparing the intermediate mold body 30 in a state where it faces the fixed mold body 10 and the movable mold body 20, the space between the fixed mold body 10 and the intermediate mold body 30 is prepared. In addition, the molded plates 44 made of a metal plate are arranged between the movable mold body 20 and the intermediate mold body 30, respectively. Specifically, the plates 44, 44 are set by guides (not shown) projecting from the concave and convex surface portions 42, 42 of the intermediate mold body 30 (see FIG. 2 (a)). Molded plate 44 set here
For example, a laminated steel sheet having an adhesive film adhered to the surface is used.

In this case, the punch 50 is held in an extended state, the fixed mold body 10 is fixed to the injection molding machine 52, and the movable mold body 20 is closed and opened by the action of hydraulic pressure or the like. It has become. Such a fixed mold body 10 and a movable mold body
As shown in FIG. 3, the intermediate mold body 30 disposed between the intermediate mold body 20 and the intermediate mold body 20 includes rollers 54, 54,... A first roller conveyor 55, and placed on the roller conveyor 55,
A second roller conveyor 5 having rollers 56, 56... Sequentially arranged in a direction perpendicular to the drawing (perpendicular to the drawing)
7, and the intermediate mold body 30 arranged on the second roller conveyor 57 is arranged between the fixed mold body 10 and the movable mold body 20 by an air cylinder (not shown). I have.

* Second step With the plates 44, 44 set as described above, the movable mold body 20 is moved toward the fixed mold body 10,
In the process, the intermediate mold body 30 is pushed to fix, move, and simultaneously clamp the intermediate mold bodies 10, 20, and 30 (see FIG. 2 (b)). At the time of this mold clamping, the molded plates 44, 44 set as described above are pressed along the uneven surface portions 42, 42; 42, 42. Specifically, the knockouts 43, 43 of the fixed mold body 10 and the movable mold body 20 serve as plate holders, and the knockouts 43, 43 are punched with the movement of the fixed and intermediate mold bodies 10, 30. It is retracted by the gaps 47, 47 between the plates 45, 45, and is completely clamped and pressed in a state of contact with the crack plates 45, 45. At this time, on the fixed mold body 10 side, the punching / cumulative sprue 11 and the punching punch 50 project from the surface of the knockout 43 to make a hole corresponding to the plate 44 to be formed. Further, the periphery of each of the molded plates 44, 44 is
Of the movable mold body 20 and the peripheral part of the intermediate mold body 30
And the periphery of the intermediate mold body 30 are punched.

* Third step When the press working of each of the molded plates 44, 44 is completed as described above, the movable mold body 20 moves in the opposite direction to the fixed mold body 10 and moves with the fixed mold body 10. The mold is opened until the mold body 20 and the intermediate mold body 30 are separated from each other, and the first and second molds are opened.
The blank material 38 is extruded by the stripper plates 36 and 37 described above. Thereafter, the intermediate mold body 30 is retracted in the direction perpendicular to the mold clamping direction (see FIG. 2 (c)). At this time, the processed plates 44, 44 are fixed and movable mold bodies 10, 20, and the narrow opening 46, the punch and sprue 11, and the gate punch.
Knockout 43 due to frictional resistance at the shearing part with 50 mag
Is held in close contact with the surface. Also, the intermediate mold body
Blank material 38,38 remains on the stripper plates 36,37 of 30, and the punch and sprue 1
1, Drill 44a, 4 in the hole corresponding to the hole punch 50
4a remains.

* Fourth Step After the intermediate mold body 30 is retracted as described above, the fixed mold body 10 and the movable mold body 20 are clamped (see FIG. 2 (d)). At this time, each knockout 43, 43 is a punch plate 4
It is retracted to the position of 5,45, and the abutment of the peripheral part of the fixed mold body 10 and the peripheral part of the movable mold body 20
A cavity portion 40 is formed between the hydraulic cylinder 60 and the hydraulic cylinder 60.
A concave portion 62 for a synthetic resin projection is formed on the tip side of 50. In such a state, the molten resin injected from the injection molding machine 52 passes through the injection passage 12 of the sprue 11 and the cavity 40
(FIG. 2D). When the resin is filled in the cavity portion 40 in this manner, the processed molded plates 44, 44 and the injected resin are bonded by the adhesive film covering the inner surfaces of the processed molded plates 44, 44.

* Fifth Step Next, after the steps of pressure-holding and cooling, the movable mold 20 is moved in the opposite direction to the fixed mold 10 to open the mold, and the composite material 70 as a molded product is formed. It is removed (see FIG. 2 (e)).
The composite material 70 taken out of the mold bodies 10 and 20 is formed in a sandwich shape in which a synthetic resin layer 71 is filled between a pair of metal plate forming plates 44 and 44, and the tip of the punch 50. A projection 72 is formed to fill the recess 62 on the side (see FIGS. 4 and 5).

In forming the composite material 62, the materials used and the forming conditions are as follows, for example.

Molded sheet Electro-galvanized steel sheet ("Nippon Steel Corporation's" bonded steel sheet, gin-coated steel sheet ", etc.)) Stainless steel sheet, copper sheet, aluminum sheet Adhesive film 1) Polypropylene type: Admer QE305 (manufactured by Tosero Chemical Co.) Polyethylene type: Admer NE050 (manufactured by Tosero Chemical Co., Ltd.) 3) Nylon type: Esdine HM film F-7B (manufactured by Sekisui Chemical Co., Ltd.) 4) Polyester type: Chemit KF-2000 (manufactured by Toray Industries, Inc.) Synthetic resin Polypropylene, polyethylene, polyamide, ABS Press pressure: about 20 ton Injection pressure: about 240 kg / cm ² According to the above embodiment, even if a laminated steel plate covered with an adhesive film is used as the plate 44 to be molded, each adhesive film is applied. Since press working is not performed in contact with
It is not impossible for the steel sheets to overlap and to inject the resin.

Further, in the above-described embodiment, the case where the punching / cumulative sprue 11 and the punching punch 50 are provided in the fixed die body 10 has been described, but the present invention is not necessarily limited to such a structure. A punch 50 may be formed in the body 20. Further, in the above-described embodiment, the case where a laminated steel plate is used as the molded plate 44 has been described. However, the molded plate 44 does not necessarily need to be a laminated steel plate, and it is needless to say that the present invention can be applied to a case where a normal steel plate is used. It is.

FIG. 6 is a sectional view of a mold according to a second embodiment of the present invention.

The mold of the second embodiment is a synthetic resin core material layer 71 of the composite material 70.
In this case, the projection 72 and the through-hole 75 are formed at the same time. That is, a punch 50 capable of moving back and forth toward the cavity 40 is provided on the concave-convex surface portion 42 of the fixed mold body 10, and the punch 50 is connected to a piston rod 61 of a hydraulic cylinder 60, Fixed punches 58, 58 are provided in parallel with the punch 50, and portions of the concave and convex surface portion 42 of the movable mold body 20 facing the fixed punches 58, 58 are provided with the fixed punches 58, 58 when the cavity portion is formed. This is a case in which punching punches 59, 59 for through holes that are in contact with the front end surface are formed. The die 32 of the hole punch 50 and the fixed hole punch 50 are provided on the uneven surface portion 42 of the intermediate mold body 30 on the fixed mold body side.
Dies 33, 33 of 58, 58 are provided, and dies 33a, 33a of through-hole punches 59, 59 are provided on the uneven surface portion 42 on the movable mold body side.
Is provided.

The second embodiment is the same as the first embodiment except that the injection passage for injecting the molten resin is provided at the joint between the first mold body 10 and the second mold body 20 except for the side gate system. Therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted. In the side gate method, the molten resin injected from the sprue is injected into the cavity 40 through the film gate.

Next, a procedure for forming a composite material using the mold of the second embodiment will be described with reference to FIGS. 7 (a) to 7 (e).

* First step First, after preparing the intermediate mold body 30 in a state where it faces the fixed mold body 10 and the movable mold body 20, the space between the fixed mold body 10 and the intermediate mold body 30 is prepared. In addition, metal plates 44, 44 made of a metal plate are arranged between the movable mold body 20 and the intermediate mold body 30, respectively (seventh embodiment).
FIG. (A)).

In this case, the punch 50 is held in an extended state, the knockout 43 is pressed by the cylinder 49, and the fixed punches 58, 58 and the through-hole punches 59, 59 are flush with the knockout 43. positioned.

* Second step With the plates 44, 44 set as described above, the movable mold body 20 is moved toward the fixed mold body 10,
In the process, the intermediate mold body 30 is pressed to fix, move, and simultaneously clamp the intermediate mold bodies 10, 20, and 30 (see FIG. 7 (b)). At the time of this mold clamping, the molded plates 44, 44 set as described above are pressed along the uneven surface portions 42, 42; 42, 42. Specifically, the knockouts 43, 43 of the fixed mold body 10 and the movable mold body 20 serve as plate holders, and the knockouts 43, 43 are punched with the movement of the fixed and intermediate mold bodies 10, 30. The mold is retracted by the gaps 47, 47 between the plates 45, 45, and is completely clamped and pressed in contact with the punch plates 45, 45. At this time, on the fixed mold body 10 side, the hole punch 50 and the fixed hole punches 58, 58 project from the surface of the knockout 43 to make holes corresponding to the molded plate 44, and on the movable mold body 20 side. Is a hole punch for through holes
59, 59 project from the surface of knockout 43 and
Is drilled. In addition, the periphery of each of the molded plates 44, 44 is the periphery of the fixed mold body 10 and the periphery of the intermediate mold body 30, the periphery of the movable mold body 20, and the periphery of the intermediate mold body 30. Each part is punched.

* Third step When the press working of each of the molded plates 44, 44 is completed as described above, the movable mold body 20 moves in the opposite direction to the fixed mold body 10 and moves with the fixed mold body 10. The mold is opened until the mold body 20 and the intermediate mold body 30 are separated from each other, and the first and second molds are opened.
The blank material 38 is extruded by the stripper plates 36 and 37 described above. Thereafter, the intermediate mold body 30 is retracted in the direction perpendicular to the mold clamping direction (see FIG. 7 (c)). At this time, similarly to the above-described first embodiment, the processed molded plates 44, 44 are subjected to frictional resistance at a shearing portion between the narrow opening 46 of the fixed and movable mold bodies 10, 20 and the punch 50. The blanks 38, 38 remain on the stripper plates 36, 37 of the intermediate mold body 30, and the holes of the fixed mold bodies 10, 20 are removed. Drills 44a, 44a remain in the holes corresponding to the punch / sprue 11 and the punch 50.

* Fourth Step After the intermediate mold body 30 is retracted as described above, the fixed mold body 10 and the movable mold body 20 are clamped (see FIG. 7 (d)). At this time, each knockout 43, 43 has retreated to the position of the punch plate 45, 45, and the fixed mold body 10
Abutment between the peripheral portion of the movable mold body 20 and the peripheral portion of the movable mold body 20, a cavity 40 is formed between the processed molding plates 44, 44, and the piston rod 61 of the hydraulic cylinder 60 contracts to form a hole. A part of the cavity 40 at the tip of the punch 50
62 is formed. In addition, the end surfaces of the fixing hole punches 58, 58 and the end surfaces of the through hole punches 59, 59 are in contact with each other. In this state, when the molten resin injected from the injection molding machine 52 is injected into the cavity 40 through an injection passage (not shown), the molten resin is processed by the adhesive film covering the inner surfaces of the processed plates 44. The finished molded plates 44, 44 and the injected resin are in a bonded state.

* Fifth Step Next, after the steps of pressure-holding and cooling, the movable mold 20 is moved in the opposite direction to the fixed mold 10 to open the mold, and the composite material 70 as a molded product is formed. It is removed (see FIG. 7 (e)).
The composite material 70 taken out of the mold bodies 10 and 20 is formed in a sandwich shape in which a synthetic resin layer 71 is filled between a pair of metal plate forming plates 44 and 44, and the tip of the punch 50. The protrusions 72 filled in the side recesses 62, the fixed hole punching punch 58, and the through holes 75, 7
5 is formed (see FIGS. 8 and 9).

Third Embodiment FIG. 10 is a sectional view of a third embodiment of the mold according to the present invention.

The mold according to the third embodiment is a case where a plurality of (two are shown in the drawing) projections 72 and 72 and one through hole 75 are formed. That is, two punches 50a and 50b and one fixed punch 58 are formed in the fixed mold body 10, and the movable mold body 20 has through-holes that can be in contact with the front end surface of the fixed punch 58. This is a case in which a hole punch 59 is formed.

In this case, the punching punches 50a and 50b are first punching punches having a rectangular cross section on the slide plate 63 which is moved forward and backward by the hydraulic cylinders 60 and 60 toward the cavity.
50a and a second punch 50b having a circular cross section are formed so as to be able to advance and retreat toward the cavity portion 40 through the punch plate 45 and the knockout 43. The knockout 42 is fixed to the punch plate 45 at the back of the concave-convex surface portion 42 and is formed so as to be able to protrude and retract toward the cavity portion 40 as the knockout 42 moves forward and backward. In addition, the punch 59 for punching through holes is used for the movable mold body 20.
Knockout 42 fixed to punch plate 45
, And can move toward and out of the cavity 40 as the knockout 42 moves forward and backward.

In the third embodiment, the other parts are the same as those in the first and second embodiments, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

With the above configuration, during the pressing step, as shown in FIG. 11 (a), the molding plate 44 on the fixed mold body side is provided with the punches 50a, 50b and the fixed punch 58.
In addition, a plate 44 to be molded on the movable mold body side is formed.
Is punched by a fixed punch 58. In addition, in the molten resin injection step, as shown in FIG.
Since two recesses 62, 62 are formed in 40 and the fixing hole punch 58 and the through hole punch 59 are in contact with each other, the synthetic resin injected and filled into the cavity 40 is Two protrusions 72, 72 integral with the core material layer 71 are formed, and one through hole 75 is formed (see FIGS. 12 and 13).

In the second embodiment and the third embodiment, the case where the projection 72 of the composite material 70 has a circular cross section or a rectangular cross section has been described.However, the present invention is not necessarily limited to these forms. For example, FIG. 14 and FIG. As shown in the figure, a projection for a bundled wire clip or an exhaust duct formed with an annular fin 77 having a tapered tip on the tip side bottom surface of the low / low tubular projection main body 76.
72a can be formed, and as shown in FIGS. 16 and 17, a stepped projection 72b having a small-diameter stepped portion 72c and a tapered portion 72d at the tip end can be used. It can be arbitrarily formed according to the requirements. In the case of forming the projection 72a shown in FIGS. 14 and 15, as shown by the imaginary line in FIG. Provide and punch 5
The hollow forming hole punch 50b may be provided on the concavo-convex surface portion 42 of the fixed mold body 10 or the movable mold body 20 on the side facing 0. In the case of forming the stepped projection 72b, a recess 50c having a small-diameter stepped portion and a tapered portion may be formed on the distal end surface of the punch 50 as shown by an imaginary line in FIG.

Further, the form of the through hole 75 is not limited to a circular shape, and can be appropriately set according to the application.

[Effects of the Invention] Since the present invention is configured as described above, the following effects can be obtained.

1) According to the first aspect of the present invention, since the punch having the punching operation that switches between press working and molten resin injection is provided, the synthetic resin core material layer is filled between a pair of molding plates with a small number of constituent members. At the same time, a composite material having a synthetic resin projection integrated with the core layer can be formed.

2) According to the second aspect of the present invention, since the die includes the fixed punch and the punch for through-hole provided together with the punch, the composite material having a through-hole in addition to the above 1) is used. Can be molded simultaneously.

According to the third aspect of the present invention, since the plate to be formed is perforated at the time of press working, and the resin protrusion can be integrally formed in the molten resin injection step, the composite material according to the first aspect is provided. Can be formed smoothly.

4) According to the fourth aspect of the present invention, in addition to the above 3), another hole is formed in the plate to be formed at the time of press working, and when the molten resin is injected, the resin is prevented from flowing into the hole. Since the fixing punch and the punch for through-hole are in contact with each other, the composite material of the above 2) can be formed smoothly.

[Brief description of the drawings]

FIG. 1 is a sectional view of a mold according to a first embodiment of the present invention,
2 (a) to 2 (e) are explanatory views showing a processing procedure of the first embodiment of the present invention, FIG. 3 is an explanatory view showing a means for moving the intermediate mold body forward and backward according to the present invention, and FIG. FIG. 5 is a perspective view of a composite material formed by the mold of the first embodiment, FIG. 5 is a partial sectional view of FIG. 4, FIG. 6 is a sectional view of the mold in the second embodiment of the present invention, FIG. (A) to (e) are explanatory views showing a processing procedure of a second embodiment of the present invention, FIG. 8 is a perspective view of a composite material formed by a mold of the second embodiment, and FIG. FIG. 10 is a sectional view of a mold according to the third embodiment of the present invention, and FIGS. 11 (a) and 11 (b) show a mold pressing step and a molten resin injection step of the third embodiment. FIG. 12 is a perspective view of a composite material formed by the mold of the third embodiment, FIG.
13 is a cross-sectional view of FIG. 12, FIG. 14 is a perspective view showing another form of the projection formed on the composite material, FIG. 15 is a cross-sectional view of FIG.
FIG. 16 is a perspective view showing still another form of a projection formed on the composite material, FIG. 17 is a sectional view of FIG. 16, FIG. 18 is a sectional view of a conventional mold, and FIG. (E) is an explanatory view showing a processing procedure of a conventional mold, FIG. 20 is a cross-sectional view of a main part at the time of press working of the conventional mold, and FIG. 21 is a view of a composite material formed by the conventional mold. FIG. 22 is a perspective view, and FIG. 22 is a sectional view of FIG. Description of symbols (10): First mold (fixed mold) (12): Injection passage (20): Second mold (movable mold) (30): Third Die (intermediate mold) (31, 32) Die (40) Cavity (42) Irregular surface (43) Holding part (knockout) (49) Cylinder (50 ) Hole punch (58) Fixed hole punch (59) Hole punch for through hole (60) Hydraulic cylinder (expansion / retraction means) (62) Hole for projection

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Nao Saisu 2274 Hongo, Ebina-shi, Kanagawa Fuji Xerox Co., Ltd. Ebina Works (56) References JP-A-3-431 (JP, A) JP-A-60 -253520 (JP, A) JP-A-59-215843 (JP, A) JP-A-54-122672 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B29C 45/00- 45/84

Claims (4)

(57) [Claims] A first mold body and a second mold body which cooperate with a surface facing each other in a mold clamping state in which the molds are opposed to each other and in contact with each other; These first
And a first mold body disposed between the first mold body and the second mold body.
And a third mold body capable of simultaneous mold clamping in cooperation with the second mold body to form a main part, and the first mold body, the third mold body, and the second mold body. A pair of concavo-convex surface portions for press working are formed on opposing surfaces of the mold body and the third mold body, respectively, and the concavo-convex surface portions of the first mold body and the second mold body are press-processed. A punch that is capable of moving back and forth toward the cavity on one of the first and second mold bodies. The punching punch is connected to expansion / contraction moving means that performs a switching operation at the time of press working or cavity formation, and an injection passage for injecting the molten resin into the cavity is formed. And a composite simultaneous molding die. 2. The composite simultaneous molding die according to claim 1, wherein a fixed punch is provided in parallel with the punch, and a portion of the other first or second die body facing the fixed punch. A composite simultaneous molding die, characterized by forming a through-hole punching punch which comes into contact with the tip end face of said fixed punching punch when said cavity portion is formed. 3. After preparing the first, second and third mold bodies according to claim 1, between the first mold body and the third mold body and the second mold body. A first step of arranging a plate to be formed between the mold and the third mold, and a step of extending the hole punch in the first, second and third molds. A second step of pressing the molded plate by performing simultaneous mold clamping; and separating the first and second mold bodies while holding the pressed molded plate after the second step. A third step of retreating the third mold body from between the first and second mold bodies in a state in which the first die body and the first mold body are contracted and moved in a state in which the punch is contracted. A fourth step of injecting and filling a molten resin into a cavity formed by clamping with the mold body of No. 2 to form a synthetic resin layer between the two molding plates; After the first mold is solidified with the second mold,
A fifth step of taking out the composite material having the synthetic resin protrusion by releasing the mold clamping with the mold body of (5). 4. After preparing the first, second, and third mold bodies according to claim 2, between the first mold body and the third mold body, and between the first mold body and the third mold body. A first step of arranging a plate to be formed between the mold and the third mold, and a step of extending the hole punch in the first, second and third molds. A second step of pressing the molded plate by performing simultaneous mold clamping; and separating the first and second mold bodies while holding the pressed molded plate after the second step. A third step of retracting the third mold body from between the first and second mold bodies in a state in which the third punch body is contracted and moving the punching punch together with the fixed punching punch and the through-hole punching. With the punch in contact with the first
A fourth step of injecting and filling a molten resin into a cavity portion formed by clamping the mold body and the second mold body to form a synthetic resin layer between both molding plates; After the layer has solidified, the first mold body and the second
A fifth step of taking out a composite material having a synthetic resin projection and a through hole by releasing the mold clamping with the mold body of (5).