JP2002225078A - Injection-molding method and die device for composite product with different material resins - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely bind a primary molded article and an intermediate plate by making the hole of the intermediate plate share the main section of a primary cavity, and form a secondary cavity including the primary molded article extending to both of a fixed die and a movable die. SOLUTION: A die 3 for primary molding and a die 4 for secondary molding are arranged in parallel on a fixed plate 1 and a movable plate 2 while sorting them into fixed dies 31 and 41 and movable dies 32 and 42. The intermediate plate 5 having a pair of holes 6 to form primary cavities is rotatably and longitudinally movably provided between the fixed dies 31 and 41 and the movable dies 3 and 42. By the turning of the intermediate plate 5, a primary molded article 51 is transferred to the die 3 for secondary molding. This composite product 50 is molded by simultaneously performing the primary and secondary moldings with different material resins wherein a secondary cavity including the primary molded article 51 is formed by the fixed die 41 and the movable die 42. The intermediate plate 5 and the movable dies 32 and 42 are opened by simultaneously operating the intermediate plate 5 and the projecting members 34 and 44 of both movable dies. By the projecting members 34 and 44, the mold releasing for the primary molded article 51 and the movable die 32, and the mold releasing for the composite product 50 are simultaneously performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate plate rotatably provided between a mold for primary molding and a mold for secondary molding. And a mold apparatus for injection molding a composite product according to the invention.

[0002]

The transfer of the primary molded product to the secondary molding side is performed by an intermediate plate provided between the molds so as to be able to rotate and move forward and backward. In the conventional method of forming composite products of different materials with different physical properties and colors by performing compounding, the primary cavity is formed from the fixed mold and the core mold inserted into the cavity of the fixed mold from the hole of the intermediate plate Similarly, on the secondary side, a secondary cavity is formed from a fixed mold cavity containing the primary molded product and a core mold inserted into the cavity while holding the primary molded product, and the secondary cavity is used to form the secondary cavity. Combines injection molding of primary molded products with primary molded products.

In such a molding method, only the intermediate plate is used as a transfer plate also serving as a holder for a primary molded product, and molding is performed in a fixed mold cavity on both the primary side and the secondary side. Therefore, the product form is easily limited, and its application is limited. Also, the transfer of the primary molded product by the intermediate plate is unstable because it is performed while holding the periphery of the primary molded product on the plate surface of the intermediate plate, and it is easily deformed due to shrinkage. Was difficult to transfer to the secondary side. In addition, if the periphery is formed with an undercut or the like to prevent falling off, and to provide stability, there is a problem that it becomes difficult to release the mold after composite molding.

The present invention has been conceived in order to solve the problems in the above-mentioned conventional molding method, and an object of the present invention is to share a primary part of a primary cavity with a hole of an intermediate plate so that a primary part is formed. The connection between the molded product and the intermediate plate is made surely close, thereby preventing falling off during transfer and suppressing shrinkage deformation.Furthermore, the secondary cavity containing the primary molded product is fixed and movable. Accordingly, it is an object of the present invention to provide an injection molding method and a mold apparatus for a composite product which can be formed over both of them, and can easily perform secondary molding of a cylindrical product and compounding of dissimilar resins, which have been difficult so far.

[0005]

According to the injection molding method for a composite product of the present invention for the above object, a primary molding die and a secondary molding die are provided at symmetric positions of a fixed platen and a movable platen. It is divided into fixed type and movable type and arranged side by side, interposed between both fixed type and movable type, between primary side fixed type and movable type,
An intermediate plate having a pair of holes for forming a primary cavity and holding a primary molded product is provided with a center portion attached to a rotating shaft on the movable platen side so as to be rotatable and movable back and forth. The molded product is transferred to a mold for secondary molding, and a secondary cavity including the primary molded product is formed by a fixed mold and a movable mold, and then the primary molding and the secondary molding with different materials resin are simultaneously performed. In injection molding of composite products,
A projecting member is provided inside both of the movable molds so as to advance with the rotating shaft, and the projecting member is moved forward simultaneously with the rotating shaft to open the mold of the intermediate plate and the movable mold. The release of the primary molded product from the movable mold and the release of the composite product are performed simultaneously by the protruding member.

[0006] Further, the fixed mold and / or the movable mold of the mold for secondary molding is composed of a core mold and a split mold to form a cylindrical cavity, and a cavity is formed between the fixed mold and the movable mold. The primary molded product is held by the intermediate plate and transferred, and the cavity is formed in the secondary cavity through the intermediate plate and the primary molded product. In this method, the second molded article is formed and simultaneously formed with the first molded article.

Further, in the injection molding of the primary molded article, several tab molding holes are provided at regular intervals around the hole of the intermediate plate forming the primary cavity, so that the primary molded article and the tabs around it are formed. Are formed integrally, and the tabs thereof are used to suppress shrinkage of the primary molded product after release.

The injection molding die apparatus according to the present invention comprises a primary molding die and a secondary molding die which are arranged side by side in a symmetrical position between a fixed platen and a movable platen. And a primary cavity formed between a fixed mold and a movable mold on the primary side, and having a pair of holes for holding a primary molded product, and a central portion attached to a rotating shaft on the movable platen side. An intermediate plate provided between both the fixed mold and the movable mold of the mold so as to be rotatable and retractable, a projecting member of a primary molded product and a composite product provided in both the movable molds, and an advance and retreat of the projecting member. A drive device; a drive device for moving the rotary shaft forward and backward; and a rotary drive device, a double-projecting member, and a forward tuning plate for the rotary shaft.

Further, the fixed mold and / or the movable mold of the mold for secondary molding comprises a core mold and a split mold which form a cylindrical cavity, and the cavity is provided between the fixed mold and the movable mold. And forming a secondary cavity for compound molding of a primary molded product and a secondary molded product made of a different material resin by the primary molded product of the intermediate plate interposed therebetween.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 denotes a fixed plate of a mold clamping device, and 2 denotes a movable plate, which is also omitted in the drawing. .

Reference numeral 3 denotes a mold for primary molding, and reference numeral 4 denotes a mold for secondary molding. The molds are divided into fixed molds 31 and 41 and movable molds 32 and 42 at symmetric positions of the fixed board 1 and the movable board 2. Are side by side. Reference numeral 5 denotes an intermediate plate, which includes fixed dies 31, 41 and movable dies 32, 4.
2 and is provided so as to rotate and move forward and backward. The intermediate plate 5 has a primary cavity formed between the fixed mold 31 and the movable mold 32 on the primary side, and has a pair of holes 6 and 6 for holding a primary molded product at symmetric positions. The movable mold side around the hole is formed in a recess, and its peripheral wall is formed on the tapered surface together with the movable mold so that a core protruding from the mold surface is located at the center of the rear part.

Reference numeral 7 denotes a rotating shaft at the center of the movable plate which protrudes from the movable plate 2 to the fixed plate side. As a result, the intermediate plate 5 is rotated by 180 ° between the molds, and the primary molded product is transferred to the secondary mold position, and is moved forward and backward to move the fixed mold 31,
The mold is closed and opened with both the mold 41 and the movable molds 32 and 42.

The rear part of the rotating shaft 7 is hollow, and is inserted as a piston rod 9 into a hydraulic cylinder 8 provided at the center of the back of the movable platen 2. It is fitted movably in the axial direction from the rear end. Although not shown, the rotation drive shaft 10 is connected to a drive shaft of an electric motor 11 attached to the rear end of the cylinder, and is connected to the intermediate plate 5 that moves forward and backward together with the rotation shaft 7 by the hydraulic cylinder 8. The main part of the advance / retreat and rotation drive device 12 for further rotating and transferring the primary molded product to the mold position for secondary molding is formed.

The fixed dies 31, 41 are provided with sprue bushes 33, 43, and the movable dies 32, 42 are provided with projecting members 34, 44 therein. This projecting member 34,
Each of the projections 44 is implanted in the protruding plates 36, 46 of the in-mold cavities 35, 45 such that the tips enter and exit the mold surface. It is set up.

The advancing / retracting drive units 14 and 15, together with the advancing / retracting / rotating drive unit 12, are provided with hydraulic cylinders 16 and 17 juxtaposed on both sides thereof, and vacantly mounted on both pistons 18 and 19 by being inserted into and supported by guide pins. Tuning board 20 in room 24
And projecting rods 21 and 22 jointed from the tuning plate 20 to the projecting plates 36 and 46.

The tuning plate 20 has a piston rod portion of the rotary shaft 7 inserted through a tuning flange 23 provided at an upper portion thereof. The tuning flange 23 is provided so as to come into contact with the tuning plate 20 at the rearmost position of the rotating shaft 7, whereby the rotating shaft 7 can be moved independently of the hydraulic cylinder 8 by the protruding / retracting driving device 14. , 15 hydraulic cylinders 16, 17
As a result, the forward movement is performed simultaneously with the projecting side via the tuning plate 20.

In the above-structured mold apparatus, the injection molding of a composite product made of a different material resin is continuously performed by transferring the primary molded product by rotating the intermediate plate 5 and simultaneously opening and closing the molds 3 and 4 on both sides. Can be done.

Hereinafter, the molding steps will be described in order. FIG. 1 shows that a primary molded product 51 injection-molded by a primary molding die 3 is opened by rotating the intermediate plate 5 by 180 ° by a rotating shaft 7 after the mold is opened, and movable with a stationary mold 41 on the secondary molding side. This shows a state of being transferred between the molds 42.

After this transfer, the intermediate plate 5 is moved backward by the hydraulic cylinder 8 together with the rotating shaft 7 until the recesses fit into and contact the mold surfaces of the movable dies 32 and 42 on the primary and secondary sides. Then, the movable molds 32 and 42 are closed (see FIG. 3 for the closed state).

Next, while the movable dies 32 and 42 are kept closed with the intermediate plate 5, the movable plate 2 is moved forward to move the intermediate plate 5.
Of the fixed dies 31, 41, the fixed dies 31, 41, the intermediate plate 5, and the movable dies 32, 42.
Close the mold. Due to this mold closing, the fixed mold 3 on the primary side
The core of the movable die 32 is located at the center in the hole 6 closed by the first and second 32 to form a primary cavity. On the secondary side, the core of the movable die 42 is located in the primary molded product. Then, the primary molded product 51 fits into the cavity of the fixed mold 41, and the secondary cavity is formed when the primary molded product 51 becomes a mold surface on one side.

After the mold is closed, the mold is clamped by the movable platen 2.
When dissimilar materials having different physical properties or colors are simultaneously injected in a molten state from a nozzle (not shown) which is in nozzle contact with the sprue bushes 33 and 43, the cavities are injected and filled with the resin, as shown in FIG. like,
On the primary side, a new primary molded product 51 is injection-molded, and on the secondary side, a composite product 50 in which the primary molded product 51 and the secondary molded product 52 formed thereon are composited is injection-molded.

The mold opening after molding precedes the mold opening of the fixed dies 31 and 41 and the intermediate plate 5, then the movable molds 32 and 42 are opened. Move backward.
The mold opening from the movable mold side is performed by moving the intermediate plate 5 forward. The opening of the mold by the forward movement of the intermediate plate 5 is performed simultaneously with the protrusion of the projecting members 34 and 44. Since the primary cavity is formed by the hole 6 of the intermediate plate 5 and the core of the movable die, there is nothing to stop the primary molded product 51 on the intermediate plate side, and the intermediate plate 5 is separated from the mold surface of the movable die 32 as it is. This is because the primary molded product 51 shrunk by cooling remains on the core and is released from the intermediate plate 5 so that it cannot be rotated and transferred to the secondary side.

The simultaneous operation at the time of opening the mold can be easily performed by moving the rotary shaft 7 forward through the tuning plate 20 by the hydraulic cylinders 16 and 17 on the projecting side. Intermediate plate 5
2 is in the mold closed state, as shown in FIGS. 2 and 3, since the tuning flange 23 is in contact with the tuning plate 20, the hydraulic cylinders 16 and 17 use the hydraulic cylinders 16 and 17 to project the projecting members 34 and 4.
When the projection 4 is actuated, the rotary shaft 7 is simultaneously projected by the tuning plate 20.

Since the amount of protrusion of the rotating shaft 7 and the protruding members 34 and 44 is the same, and the front end surfaces of the protruding members 34 and 44 are flush with the mold surface and are in contact with the molded product. With the release of the plate 5, the projecting member 34 also protrudes from the movable mold 32, pulls out the primary molded product 51 from the core, and supports the primary molded product 51 with the tip end surface as it is until the intermediate plate 5 reaches the mold opening position.
Act together with. Also on the secondary side, the projecting member 44
Of the composite product 50 from the movable mold 42 is performed.

At the mold opening completion position, the intermediate plate 5 keeps its position by pressurizing the piston rod 9 by the hydraulic cylinder 8. Thereafter, the projecting members 34 and 4 are used to rotate the intermediate plate 5.
4 is returned. By the contraction operation of the hydraulic cylinders 16 and 17, the protruding members 34 and 44 are retracted to the original position together with the tuning plate 20 and fit in the mold. At this time, the tuning plate 20
Are separated from the tuning flange 23, so that the projecting members 34, 4
4, the intermediate plate 5 also maintains the mold open position.

After the protruding members 34 and 44 are separated from the primary molded product 51 and the composite product 50, the composite product 50 is taken out from the intermediate plate 5 on the secondary side to complete the molding. Thereafter, the intermediate plate 5 is rotated by 180 ° by the operation of the electric motor 11, and as shown in FIG.
Is transferred between the fixed mold 41 on the secondary side and the movable mold 42, and the hole 6 after releasing the composite product 50 is fixed in the fixed mold 31 on the primary side.
And the movable mold 32 to transfer to the next injection molding.

FIG. 5 et seq. Show an embodiment in which a mold for secondary molding is composed of a core mold and a split mold to form a cylindrical composite product 60 having a composite flange portion shown in FIG. It is shown.

The composite product 60 is composed of a cylindrical main body 61 (PA resin) having a lower end portion enlarged with the neck portion 63 and a neck portion 6.
3 and a flange portion 62 around the lower portion, and has a structure in which the flange portion 62 is formed of a composite material of a different material (HDPE). The fixed die 31 provided on the fixed platen 1
Is movable in a split mold but is a mold on the fixed board side, and is called a fixed mold as in the above embodiment. The description of the same parts is omitted.

Also in the embodiment shown in FIGS. 5 to 9, the primary molding die 3 has the same configuration as the above embodiment. Since the composite product 60 is a cylindrical article, the molds 4 for secondary molding have core dies 25 and 26 all having a taper, and
The movable mold is divided into front and rear molds of a rear mold 42a and a front mold 42b, and the hydraulic mold is alternately arranged over the upper and lower support plates 42c for each of the front and rear molds. The operation can be performed individually by the cylinders 27 and 28 and the pistons 27a and 28a. Opening and closing of the fixed mold 41 is also omitted in the figure, but is performed by a hydraulic cylinder.

The core mold 25 of the fixed mold 41 and the core 26 of the movable mold 42 have such a length that they come into surface contact with each other at the parting line of the mold at the position of the intermediate plate 5. A runner 29 and a gate connected to the sprue 43a from the base 43 are formed so that the secondary molding of the cylindrical main body 61 can be performed from the inside.

The lower end of the core 26 of the movable mold 42 is extended in diameter to project from the tapered base 26a embedded in the mold plate 42c to the parting line, and a cavity of the cylindrical main body 61 is formed around the part. . A sprue protruding pin 26b is provided in the center of the inside.

The upper and lower portions of the tapered base 26a are pushed into the mold opening space 40 after the mold is opened, and the
0, presses the lower end edge of the cylindrical main body 61, pulls out the cylindrical main body 61 from the core mold 26, and the projecting members 44 by a pair of plates.
A support pin 44 is provided to connect the support pin 44a to the protruding plate 36 together with the protruding pin 26b.

On both sides of the fixed die 41, a template mounting plate 4 is provided.
6 to through holes 53 provided on both sides of the hole 6 of the intermediate plate 5
A pair of arm members 45, 45 that fit into the rear mold 42a of the fixed mold 41 and the movable mold 42 are provided protruding therethrough. The inner side of the base end and the inner side of the distal end of the arm member 45 are formed on tapered surfaces in which the fixed mold 41 and the tapered shoulders of the rear mold 42a are fitted respectively. It is designed to tighten strongly.

Around the hole 6 forming the primary cavity of the intermediate plate 5, several tab forming holes 54 are formed at regular intervals, and the resin is supplied from the tab forming hole 54 to the primary cavity. Injection filling is performed, and a plurality of tabs 65 are integrally formed around the annular member 64 of FIGS. 10 and 11 which are primarily molded at regular intervals, and the primary molded product 51 after mold release is formed by the tabs 65. The shrinkage can be suppressed by anchoring to the intermediate plate 5.

In the secondary molding by the above-mentioned mold apparatus, since the split mold is used for both the fixed mold 41 and the movable mold 42 on the secondary molding side, the split mold is opened before opening and closing with the intermediate plate 5. Opening and closing are performed by the hydraulic cylinders 27 and 28. After the composite product 60 is released, the front and rear dies 42a and 42b of the fixed mold 41 and the movable mold 42 on the secondary molding side are closed by the hydraulic cylinders 27 and 28 provided therein, and the fixed mold 41 becomes the core mold 25. In the movable mold 41, a cavity of the cylindrical main body 61 whose lower end is enlarged is formed around the core mold 26, and the parting surfaces of the cavity and the fixed mold 41 are formed. And the cavity of the flange portion 62 formed in
Annular member 64 is accommodated in the flange cavity to form a secondary cavity forming a part of the mold surface.

In the secondary cavity, resin is injected and filled from the sprue 43a in the core mold 25 through the runner 29 on the contact surface of the core molds 25 and 26 from the inside. Composite molding is performed.

Opening of the mold after molding is performed by moving the movable mold 42 together with the intermediate plate 5 by moving the movable platen 2 (see FIG. 3) backward as in the above embodiment. With this mold opening, the fixed mold 41 and the movable mold 42
The two tapered shoulders are pulled out from the tapered portions of the arm members 45, 45, and the restraint by the arm members 45, 45 is released, so that the mold can be opened to the side. Then, when the fixed mold 41 is opened to the side by a hydraulic cylinder (not shown), and the molded neck 63 is released from the screw mold surfaces of the fixed molds 41, 41, the composite product 60 is also released from the fixed mold side. Therefore, the mold opening between the fixed mold 41 and the intermediate plate 5 is performed without any support to the set position shown in FIG. 6 together with the primary side.

In the mold open position, before the intermediate plate 5 is released from the movable mold 42 simultaneously with the primary side, the rear mold 42a
Are opened on both sides by the hydraulic cylinder 27 so that the lower end of the expanded body can be easily projected. After this die 42
When the release of the intermediate plate 5 from the movable mold 42 after the mold opening of a is performed together with the primary side by advancing the rotating shaft 7 in synchronization with the protruding side as in the above-described embodiment, the intermediate plate 5 42 and at the same time, the projecting member 44 formed by the pair of plates.
And the protruding pin 26b advances, the protruding member 44 enters the mold opening space 40, and the lower end edge of the cylindrical main body 61 is moved to the front mold 42.
7B, the projecting pin 26a protrudes the sprue 29 ', and releases the cylindrical main body 61 from the core mold 26 as shown by a chain line in FIG.

By releasing the intermediate plate 5, the front mold 42b, whose shoulder portion is fitted into the recess of the intermediate plate 5, can be opened to the side, so that the hydraulic cylinder can be opened. 28
To open the front mold 42b. Thereby, the movable mold 42
As a result, the composite product 60 can be pulled out to the movable mold side by grasping the screw neck side by a robot or the like.

After the removal of the composite product 60 is completed, the front and rear molds are closed in the movable mold 42 after the protruding member 44 is returned, and the primary molding is performed by rotating the intermediate plate 5 as in the above embodiment. The transfer of the product to the secondary side, the closing of the movable mold 42 by pulling back the intermediate plate 5, and the overall closing of the mold by the forward movement of the movable platen 2 are performed, and the process proceeds to the next molding. .

As described above, when the mold for secondary molding is constituted by the split mold and the core mold, composite molding of a cylindrical product becomes possible, and since it has a threaded portion and an undercut portion, it can be separated in the axial direction. A composite product made of a resin of a different material that is difficult to mold can be easily formed. Also, it is not necessary to form all of the molds for secondary molding from split molds and core molds, which can be selected as movable molds or movable molds or both depending on the product form. Therefore, various types of products can be made into a composite product by using a different material resin suitable for the application.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional plan view showing a state in which a primary molded product has been transferred to a mold for secondary molding after mold release.

FIG. 2 is a schematic plan sectional view of the injection molding mold according to the present invention when the mold is closed.

FIG. 3 is a schematic plan sectional view of the fixed mold and the intermediate mold when the mold is opened.

FIG. 4 is a schematic plan cross-sectional view showing a mold opening and a mold release state of an intermediate plate and a movable mold.

FIG. 5 is a schematic plan sectional view of another embodiment in which a mold for secondary molding is formed with a core mold and a split mold when the mold is closed.

FIG. 6 is a schematic plan sectional view showing a mold opening state of a secondary molding die.

FIG. 7 is a schematic cross-sectional plan view showing a release state of the composite product.

FIG. 8 is a schematic vertical sectional side view of the movable type.

FIG. 9 is a sectional view taken along the line AA in FIG.

FIG. 10 is a longitudinal sectional view of one embodiment of a primary molded product.

FIG. 11 is a plan view of the same.

FIG. 12 is a longitudinal side view of one embodiment of a composite product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed board 2 Movable board 3 Mold for primary molding 4 Mold for secondary molding 5 Intermediate plate 6 Hole for primary cavity 7 Rotation shaft 9 Piston rod of rotation shaft 12 Rotation and retreat of intermediate plate Driving device 14,15 Projecting member reciprocating device 20 Tuning plate 21,22 Protruding rod 23 Tuning flange 25,26 Core type 26b Sprue protruding pin 27,28 Split hydraulic cylinder 29 Runner 31,41 Fixing between core types Mold 32, 42 Movable mold 42a Movable rear mold 42b Movable front mold 34, 44 Projecting member 45 Arm member 50 Composite product 51 Primary molded product 52 Secondary molded product 53 Through hole 60 Cylindrical composite product 61 Cylindrical Main body (secondary molding) 62 Flange part (secondary molding) 63 Screw neck (secondary molding) 64 Ring member (primary molding)

Continued on the front page F term (reference) 4F202 AG03 CA11 CB01 CB22 CK12 CK52 4F206 AG03 JA07 JB22 JC02 JL02 JM04 JN12 JN32 JN35 JQ81

Claims (5)

[Claims] 1. A mold for primary molding and a mold for secondary molding are provided separately at a symmetric position between a fixed platen and a movable platen, separately for a fixed mold and a movable mold, and both fixed molds are provided. An intermediate plate having a pair of holes, which forms a primary cavity and holds a primary molded product, is interposed between the fixed mold and the movable mold on the primary side between the movable mold and the movable mold. The center part is attached to the driving shaft, and it is provided so as to be able to rotate and advance and retreat. After being formed with the movable mold, when performing the primary molding and the secondary molding simultaneously with the dissimilar materials resin to perform the injection molding of the composite product, the projecting members of both the movable molds are moved forward together with the rotating shaft. The intermediate plate and the movable mold Mold opening was carried out, and release from the movable mold of the primary molded article thereof projecting member, an injection molding method of a composite product according to different material resin which is characterized in that a releasing of the composite product at the same time. 2. A fixed mold and / or a movable mold of the mold for secondary molding is constituted by a core mold and a split mold to form a cylindrical cavity, and a cavity is formed between the fixed mold and the movable mold. The primary molded product is held and transferred to the intermediate plate, and the cavity is formed in the secondary cavity through the intermediate plate and the primary molded product. 2. The method of injection molding a composite product using a dissimilar material resin according to claim 1, wherein the secondary molded product is formed into a composite with the primary molded product at the same time. 3. In the injection molding of the primary molded product, a plurality of tab molding holes are provided at regular intervals around a hole of the intermediate plate forming the primary cavity, and the primary molded product and the tabs around the same are formed. 3. The injection molding method for a composite product using a dissimilar material resin according to claim 1 or 2, wherein the first molded product is molded integrally and the tabs thereof are used to suppress shrinkage of the primary molded product after release. 4. A mold for primary molding and a mold for secondary molding arranged side by side in a fixed mold and a movable mold at symmetric positions of the fixed board and the movable board, and a fixed mold on the primary side and a movable mold. The metal mold has a pair of holes for holding a primary molded product while being interposed between the mold and a primary cavity. An intermediate plate provided between both the fixed mold and the movable mold of the mold, a protruding member of the primary molded product and the composite product provided in both the movable molds, an advance / retreat driving device for the protruding member, and A mold device for injection molding of a composite product made of a dissimilar material resin, comprising a reciprocating and rotating drive device, a biprotruding member, and a forward tuning plate of a rotating shaft. 5. The fixed mold and / or the movable mold of the mold for secondary molding comprises a core mold and a split mold forming a cylindrical cavity, and the cavity is provided between the fixed mold and the movable mold. 5. A secondary cavity for composite molding of a primary molded product and a secondary molded product made of a different material resin is formed by a primary molded product of the intermediate plate interposed in the intermediate member.
A mold device for injection molding of a composite product made of the different material resin described.