JP3524966B2 - Mold equipment for resin molding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molding die apparatus (hereinafter referred to as "die apparatus"). More specifically, the present invention relates to a mold device capable of easily and efficiently manufacturing a composite type thermoplastic resin molded product having an excellent appearance.

[0002]

2. Description of the Related Art In recent years, resin molded articles, which are partially provided with a skin material layer with a foam layer (polyurethane foam, polypropylene foam, etc.), are often used for automobile interior parts and the like. In such a composite type resin molded product, as shown in FIGS.
And a portion (hereinafter, referred to as "skin having a skin") 91 provided with the base material layer 912 and a portion (hereinafter, referred to as "a non-skin") 92 not provided with the skin material layer are separate mold devices. Using
It is general that each of them is manufactured and then assembled in a later step by using a locking component such as a screw screw stopper.

[0003]

As described above, in this type of resin molded product, it is necessary to separately prepare the covered skin portion 91 and the non-covered skin portion 92, which causes a problem that the manufacturing process becomes long. Have In addition, the assembly work of both requires a certain amount of work, which results in low manufacturing efficiency and high manufacturing cost. Therefore, it has been desired in the past to provide a mold apparatus (mold) capable of easily and efficiently manufacturing such a resin molded product at low cost.

The present invention has been made in view of the above-mentioned viewpoints, and an object of the present invention is to provide a mold apparatus capable of easily and efficiently manufacturing a composite type resin molded product having an excellent appearance.

[0005]

Means for Solving the Problems The present inventor has conducted extensive studies to solve the above problems. As a result, after the skin material to be the skin material layer 911 is set in advance in the molding space of the injection molding die, the base material layer 912 and the non-skin portion 92 can be integrally molded by an injection molding method. , I thought that the above problems could be solved. Further, if the same skin material is set in a mold for injection compression molding, and then the base material layer 912 and the non-skin portion 92 are integrally molded by an injection compression molding method, the above problem may be solved. I originally thought.

However, in the above case, the resin raw material (for example, in the case of polypropylene, 200 to 2 in the case of polypropylene, which is heated to a high temperature, is heated in the molding space of the mold which is clamped.
40 ° C is the prescribed injection pressure (500 to 1500 kgf /
under about ² cm2). Therefore, the foam layer 911a of the skin material may be melted and crushed by the heat of the resin material and the injection pressure. Therefore, in the above case, it is difficult to integrally form a molded product of satisfactory quality.

On the other hand, in the above case, for example, as shown in FIG.
As shown in (a), when the mold 96 is opened by a predetermined amount (for example, the clearance indicated by the symbol X in the figure is 10 to 50 mm), the cavity mold 961 or the core mold 96 is opened.
The resin raw material 99 in a molten state is injected and arranged at a predetermined position of 2. Further, as shown in FIG. 7B, the raw material 99 is shaped by pressing and pressurizing the raw material 99 so as to flow (fill) it uniformly in the molding space of the mold. . Then, in this method, when the mold 96 is opened by a predetermined amount,
Since the raw material resin 99 is disposed by injection, the resin 99 will hit the foam layer 911a in a state where the injection pressure and heat at the time of injection are relaxed. Therefore, in this case, the problem of the foam layer 911a, which is a problem in the above case, is unlikely to occur.

On the other hand, in this case, the resin raw material 9
Since 9 (particularly, the surface side) is shaped in a cold state to some extent, it is easy to cause a defect in appearance in a portion of the molded product corresponding to the non-skin portion 92. That is, in this case, as shown in FIG. 21, substantially ring-shaped patterns (flow marks) 971 to 974 are likely to occur at the position located near the injection gate of the resin raw material 99 in the molding space. Further, when the resin raw material 99 is supplied from the plurality of injection gates into the same molding space, a seam (weld line) 98 is formed at a position where the resin raw materials supplied from different gates collide.
1 and 982 are likely to occur. And these patterns 971-
974 and the seams 981 and 982, the non-skin portion 92
(971, 981, etc.) that occur in (1) and (2) tend to significantly impair the appearance of the molded product. Therefore, even in the above case, it is difficult to integrally mold a molded product having a satisfactory quality.

Under the circumstances described above, the present inventor has conducted further research, and as a result, can easily and efficiently produce a composite type resin molded product having an excellent appearance without the drawbacks of the above-mentioned molds. The invention relating to a mold apparatus (mold) that can be manufactured has been completed.

That is, the mold apparatus according to the first aspect of the present invention comprises a base material layer of a skin portion having a skin material layer with a foam layer and a base material layer composed of a thermoplastic resin, and a thermoplastic resin. Connecting the non-epidermal part with the epidermal part and the non-epidermal part, and
A mold apparatus for manufacturing a composite thermoplastic resin molded product (hereinafter referred to as "molded product") while integrally molding at least one connecting portion made of a thermoplastic resin. The mold apparatus is configured to form a molding space including at least one throttle space and an injection compression molding space and an injection molding space that are communicated with each other while being partitioned by each of the throttle spaces when the mold is clamped. A cavity mold and a core mold, which are provided with a cavity mold and a core mold which are fitted to each other, form a base material layer in the injection compression molding space when the mold device opens the mold device. Injection placement means for performing injection placement in the region on the injection compression molding space side, a thermoplastic resin for forming the non-skin portion in the injection molding space, and the connecting portions in the drawing spaces. To form The thermoplastic resin for, during the clamping, characterized in that it comprises an injection injection means for injecting injection toward the molding space out the injection, the.

The "throttle space" is for preventing passage of the thermoplastic resin injected and arranged by the "injection arrangement means". The form of this space is not particularly limited as long as this action is provided. For example, as shown in FIG. 4, a space K ₃ that is shallow in the opening / closing direction of the mold (hereinafter referred to as “vertical direction”) and has a cross-sectional shape narrowed in that direction can be exemplified. Further, it may have a cross-sectional shape narrowed in a direction substantially perpendicular to the vertical direction (hereinafter, referred to as “lateral direction”). Further, as shown in FIG. 16A, a portion K narrowed down in the vertical direction.
A space K ₃₆ in which ₃₆₁ and laterally narrowed portions K ₃₆₂ and K ₃₆₃ are mixed may be used. Note that the direction in which the space is narrowed (hereinafter referred to as the “throttle direction”) is not limited to the vertical direction and the horizontal direction illustrated here, and can be variously selected within the range in which the object of the present invention can be achieved.

Further, as shown in the third aspect of the present invention, it is preferable that the space width of the diaphragm space along the diaphragm direction is 0.5 to 3.0 mm. If there is a portion where this value is less than 0.5 mm, the connecting portion formed in the aperture space may have insufficient strength. On the other hand, if this value exceeds 3.0 mm, the above-mentioned "prevention of passing through" may not be achieved reliably.

Further, the above-mentioned throttle space does not necessarily have to be a single space, and a plurality of spaces may be arranged between one "injection compression molding space" and one "injection molding space". For example, as shown in FIG. 14A, even if a plurality of diaphragm spaces K ₃₁ and K ₃₂ narrowed in the vertical direction are stretched in a strip shape in both spaces, as shown in FIG. Alternatively, a plurality of laterally restricted diaphragm spaces K ₃₃ and K ₃₄ may be stretched in a strip shape in both molding spaces. Furthermore, spaces narrowed down in different directions (for example, the vertical direction and the horizontal direction) may be mixed. Further, the present apparatus may be provided with two or more sets of molding spaces including the above-mentioned injection compression molding space, injection molding space and the like, and may manufacture two or more molded products at one time. Furthermore, the injection compression molding space and the injection molding space that constitute one molding space are
Each need not be single.

The structures of the "injection arrangement means" and the "injection injection means" are not particularly limited. For example, a valve gate type as shown in FIG. 2 can be exemplified. Also,
In this case, the position and the number of gates for injecting and arranging the thermoplastic resin or for injecting the thermoplastic resin are not particularly limited. Also,
The same resin is usually used as the "thermoplastic resin to be injected and arranged" and the "thermoplastic resin to be injected and injected". However, the object of the present invention can be sufficiently achieved even if a predetermined same kind or different kinds of resins are used. An example of the combination of the “same type” of resin is a case where one is polypropylene (polyethylene) having a high degree of polymerization and the other is polypropylene (polyethylene) having a low degree of polymerization. In addition, one side is modified polypropylene (polyethylene)
Also, the case where the other is unmodified polypropylene (polyethylene) can be exemplified. Further, when the above "different" resins are used, it is preferable to select resins having compatibility with each other in order to sufficiently secure the integrity of the molded product. For example, when one is ABS and the other is polystyrene, one is polyethylene, the other is polypropylene, one is polyethylene, and the other is polyisobutylene. Further, as these resins, it is particularly preferable to select those having high fluidity such as polypropylene (including talc) and ABS.

Further, as shown in the second aspect of the present invention, in addition to the injection compression molding space and the like, the cavity mold and the core mold in the mold clamped state are close to the throttle space and the injection compression molding space. It is also possible to form a continuous auxiliary space without being in a narrowed state. In this case, the object of the present invention can be achieved more easily and surely. Furthermore,
As shown in the fourth aspect of the present invention, it is preferable that the space between the parting surface of the cavity mold and the parting surface of the core mold is 10 to 50 mm when the injection arrangement means performs the injection arrangement. If this distance is less than 10 mm, the base material layer of the surface skin portion is in a state of being produced by an injection molding method, and the above-mentioned "defective foam layer" is likely to occur. On the other hand, if this interval exceeds 50 mm, it will take time from the resin pouring arrangement to the mold clamping / pressurizing. Then, the portion of the resin that is initially placed in the space and is in contact with the mold surface is deprived of heat without being sufficiently pressurized, so that a short shot is likely to occur.

The skin material which constitutes the above-mentioned "skin material layer" should be disposed in the region of the cavity or core mold on the side of the space for injection compression molding when the mold apparatus is in an open state. is necessary. The "skin layer" constituting the design surface of this skin material is woven cloth, non-woven cloth or PV.
A sheet or film of a thermoplastic resin such as C, ABS, TPO, or a thermoplastic elastomer can be exemplified. Moreover, PP, PU, PVC etc. can be illustrated as a material of a "foaming layer." In addition, the "thermoplastic resin to be injected and disposed", that is, the resin that constitutes the base material layer can be made of the same material as the foamed layer, or can be reliably bonded to the foamed layer by the anchor effect. It is desirable that it is

[0017]

The mold apparatus according to the first aspect of the present invention has a space for injection compression molding (hereinafter, referred to as “first
"Space". ) And a space for injection molding (hereinafter referred to as “second space”), and a cavity mold and a core mold. Then, the base material layer of the skin portion is formed in the first space, the non-skin portion is formed in the second space, and the connecting portion that connects them is formed in the drawing space. Therefore, it is not necessary to separately prepare the surface skin portion and the non-skin portion, and it is not necessary to assemble the both in a later step. As a result, it is possible to improve the manufacturing efficiency of the molded product and reduce the manufacturing cost.

Further, the apparatus is provided with an injection arranging means and an injection injection means. Of these, the injection arranging means is a thermoplastic resin (hereinafter, referred to as “first raw material”) that forms a base material layer at a predetermined position in the region of the cavity type or the core type on the first space side when the mold is opened. ".) Is to be placed by injection. Then, the first raw material is injected and arranged in advance toward the region on the first space side where the skin material is set in advance. Further, the mold apparatus is clamped together with the injection arrangement or after the injection arrangement to make the first raw material flow uniformly in the first space.

At this time, what directly communicates with the first space is a throttle space which is narrowed in a predetermined direction and which makes it difficult for viscous fluid to pass through. Therefore, if the amount of the first raw material fills the first space without excess or deficiency, it is difficult for the same raw material to enter the throttle space. It constitutes a base material layer. Even if this raw material slightly invades the drawing space K ₃ , the invading raw material is hardened in this space (especially near the inlet) and easily stays. Then, the first raw material is hard to proceed further than the hardened / stopped portion. As described above, since the base material layer is formed by the injection compression molding method, flow marks and weld lines often occur as described above, but these are hidden by the skin material layer and do not appear on the design surface.

On the other hand, the injection / injection means is a thermoplastic resin (hereinafter referred to as "second raw material") forming the non-skin portion and the connecting portion toward the second space when the apparatus is clamped. ) Is injected and injected. That is, after molding the base material layer, the second raw material is injected into the second space at a proper timing by injection. Then, the injected and injected second raw material vigorously flows in the second space, fills the same space and the throttle space, and forms the non-skin portion and the connecting portion.
As described above, since the non-skin portion is formed by the injection molding method, flow marks and weld lines that significantly impair the external appearance do not occur.

Further, the mold apparatus according to the second aspect of the present invention is also provided with an auxiliary space that is continuous with the first space and is not in a throttled state, near the throttle space. As a result, even if the injection amount of the above-mentioned first raw material is large and the first raw material overflows from the first space,
It easily flows toward the auxiliary space where it easily flows. Therefore, this injection placement amount is "amount that fills only the first space".
To "the amount that also fills the auxiliary space",
The first raw material can be more reliably prevented from entering the throttle space. Further, if there is an unfilled portion of the first raw material in the auxiliary space, the second raw material is filled therein. In this case, the boundary between the second raw material and the first raw material exists in this auxiliary space. Therefore, even if this boundary becomes a weld line, it is difficult to appear as the appearance of the molded product.

[0022]

EXAMPLES The present invention will be specifically described below with reference to examples. (1) Outline of Mold Device The mold device of this embodiment is shown in FIGS. 1 to 7, and includes a movable mounting plate 511, a fixed mounting plate 512, a cavity mold 521, a core mold 522, and It is provided with a first hot runner nozzle 61 and a second hot runner nozzle 62. The movable mounting plate 511 and the fixed mounting plate 512 are arranged so as to face each other with a predetermined gap.
The cavity mold 521 is attached to the lower surface side of the movable mounting plate 511, and has a protrusion 521b substantially at the center of the contact surface 512a with the molded product. The core type 522
Are arranged on the upper surface side of the fixed mounting plate 512. Then, in a region on the right side thereof, a main body portion 522a provided with a slide groove M opening in the cavity mold 521 direction and a slide portion 522b sliding in the slide groove M are provided. . Further, a step D is provided in a portion of the main body portion 522a from the sliding groove M.

Further, on the left end side of the slide portion 522b,
A turnout pin 522c protruding toward the cavity mold 521 is arranged. Further, the slide portion 52
2b is springs S ₁ and S ₂ arranged on the lower surface side.
As a result, it is biased toward the cavity mold 521.
However, as shown in FIG. 3 and the like, the locking shaft I ₁ of the interlock mechanism I arranged on the right side of the core mold 522 is provided with a locking groove 522 provided on the right side surface of the slide portion 522b.
By fitting into d, the lower surface of the slide portion 522b can be brought into contact with the bottom surface of the sliding groove M. Further, as shown in FIG. 3, when the cavity mold 521 is brought close to the core mold 522 to be clamped, a molding space K is formed inside. Then, as shown in FIG. 4, a portion sandwiched between the protruding portion 521b and the left end side of the slide portion 522b becomes a diaphragm space K ₃ . Further, on the left side of the space K ₃ , the first space K ₁ which is in a continuous state with each other is provided.
And the auxiliary space ₄ is formed. Of these, the portion surrounded by the step D and the slide portion 522b is the auxiliary space K ₄ , and the remaining portion is the first space K ₁ . Further, a second space K ₂ is formed on the right side of the diaphragm space K ₃ .

As shown in FIG. 2, the first hot runner nozzle (injection arrangement means) 61 is incorporated in the core mold 522 at a position on the left side. Then, the first raw material is injected and arranged from the front side first valve gate G ₁ to a predetermined portion of the region on the side of the first space K ₁ . Further, the second hot runner nozzle (injection injection means) 62 and the core mold 522 are incorporated in the rightward portion. Then, in order to inject and inject the second raw material (in this embodiment, the same resin raw material as the first raw material) from the front side second valve gate G ₂ into the second space K ₂ . belongs to. Inside the hot runner nozzles 61 and 62, pistons P ₁ and P ₂ for adjusting the injection amount and the injection time of the raw materials at arbitrary timing are provided by a predetermined hydraulic or pneumatic device. , Is arranged so that it can be moved backward. Note that the number of hot runner nozzles 61, 62 to be placed, the location of the hot runner nozzles 62, and the like are not limited to those shown in this embodiment, and various selections can be made according to the shape of the product.

Further, the rear side of each of the means 61, 62 is
The branched resin paths 631 and 632 are respectively connected. The branched resin paths 631 and 632 meet at a predetermined position in the main body portion 522a to form the core mold 52.
It is connected to the nozzle (not shown) at the tip of the injection cylinder of the main body of the injection molding machine on the outside of 2. With this device,
In this way, the same resin is supplied to each hot runner nozzle 61, 62 from the same injection molding machine body. However, the same, the same kind, or different kinds of resin raw materials having compatibility with each other may be supplied from different injection molding machine bodies to the respective hot runner nozzles 61 and 62. still,
This device may be either a vertical type or a horizontal type, and the core mold 522 is attached to the movable mounting plate 511 so that the cavity mold 5
21 may be attached to the fixed mounting plate 512.

(2) Manufacturing Example of Molded Product In this embodiment, the mold apparatus configured as described above is used,
A molded product A as shown in FIGS. 8 and 9 was produced. The molded product A is used as an instrument panel of an automobile, and includes a surface skin portion 1, a non-skin portion 2, a connecting portion 3, and a resin reservoir portion 4. Among these, the above-mentioned surface skin part 1 is a skin material layer 11 with a foam layer and a base material layer 1 made of polypropylene.
It consists of 2. The skin material layer 11 includes a skin layer 11a made of polyvinyl chloride and a foam layer 11b made of polypropylene foam. Further, the non-skin portion 2, the connecting portion 3 and the resin reservoir portion 4 are made of polypropylene.

Then, this molded product A was produced by the above-mentioned apparatus according to the following steps (1) to (3). First, as shown in FIG. 1, after the apparatus is opened, the skin material H to be the skin material layer 11 is placed in the cavity mold 521 on the first space K ₁ side. It was arranged so as to be in contact with the inner surface of 521. The mold opening amount (interval Y _{1 in} the figure) at this time is not particularly limited as long as the skin material H can be arranged. In addition, as the above-mentioned skin material H, a material that was trimmed after being pre-shaped by vacuum forming or the like was used. Further, in order to securely fix the skin material H, it is desirable to evacuate it by embedding a breathable metal (not shown) in the location where the skin material H is arranged. Further, in this step, the locking shaft I ₁ is not fitted in the locking groove 522d, and the slide portion 522b is in a state of floating in the cavity mold 521 direction.

First Material Injecting and Arranging Step First, as shown in FIG. 2, the cavity mold 521 is brought close to the core mold 522, and the mold opening amount Y ₂ is 10 mm.
The cavity mold 521 was stopped when the distance reached to about 50 mm. Next, immediately after opening the first valve gate G ₁ , the injection cylinder is operated to operate the first space K.
_A predetermined amount of the first raw material (heat-melted polypropylene) was injected and arranged in the inside of ₁ . Then, after the necessary amount of the first raw material is injected and arranged, the injection operation of the injection cylinder is temporarily stopped, and immediately after that, the first valve gate G ₁ is closed to set the injection arrangement of the first raw material. I stopped.

In this step, the protrusion 521b,
A gap between the left end side of the slide portion 522b (hereinafter,
It is called "aperture interval". ) That is, the space width of the diaphragm space K ₃ along the diaphragm direction is 0.5 to ₃ mm. Also,
The slide portion 522b is lifted up toward the cavity mold 521 as in the previous step. However, in this step, the narrowing interval is prevented from widening by the abutment of the tip end side of the phosphorus turn pin 522c with the lower surface of the cavity mold 521.

Molding Step of Skinned Part In this step, as shown in FIG. 3, the cavity mold 521 is formed.
And the parting surfaces of the core mold 522 were abutted against each other. At this time, the lower surface of the cavity mold 521 pushed the lint turn pin 522c toward the core mold 522. Then, the lower surface of the slide portion 522b was brought into contact with the bottom surface of the sliding groove M, and the apparatus was clamped.
Also at this time, the aperture interval is kept constant by the action of the turn-around pin 522c. That is, in this embodiment, the spring sliding portion 522b S ₁ and S ₂
By urging the slide portion 522b in such a manner that it can slide in the groove M and arranging the phosphorus turn pin 522c as described above on the slide portion 522b, It is kept almost constant.

Then, the first raw material was caused to flow by the mold clamping pressure and substantially completely filled the first space K ₁ . that time,
If the injection amount of this raw material is appropriate, it is difficult for this raw material to penetrate into the throttle space K ₃ , and hence the second space K ₂ . In addition to this, in the present apparatus, the auxiliary space K ₄ is arranged near the diaphragm space K ₃ . The auxiliary space K ₄ is continuous with the first space K ₁ without being in a throttled state, as shown in FIG. Therefore, FIG. 5 (b)
As shown in (c), even if the raw material overflows from the first space K ₁ , the raw material remains in the auxiliary space K ₄ . Therefore,
The amount of the first material, is controlled during the "amount substantially filling also an auxiliary space K _4" of the same "amount to substantially fill the first space K _1" in FIG. (A) ~ FIG. (C) In this case, it is possible to prevent the raw material from entering the throttle space K ₃ .

Even if the raw material slightly penetrates into the throttle space K ₃ , the raw material is hardened near the entrance of the space K ₃ because the viscous fluid in the space is difficult to pass through.
Easy to stay. Then, the first raw material is less likely to proceed further than the hardened / stopped portion. Therefore, the second space K ₂
Not reach until. This point is the same even when the auxiliary space K ₄ as described above is not arranged in the mold 5. Furthermore, the boundary between the first raw material and the second raw material supplied in the next step can be brought into this auxiliary space K ₄ by adjusting the above-mentioned arrangement amount (for example, L ₁ shown in FIG. 5B). Is this boundary.). Therefore, even if this boundary becomes a weld line, it can be confined inside the molded product. Then, as shown in FIG. 3, the formation of the surface skin portion 1 and the resin reservoir portion 4 was completed in this step.
In the case shown in FIGS. 5B and 5C, the formation of the resin reservoir portion 4 will be completed in the next step.

Incidentally, in response to a request for the form of the final product,
As shown in FIG. 5D, it may be necessary to make the slope of the portion of the first space K ₁ close to the diaphragm space K ₃ gentle. In this case, the first raw material becomes slightly easier to flow to the throttle space K ₃ side than in the case shown in FIGS. Therefore, in such a case, as shown in FIG. 7D, it is more desirable to narrow the diaphragm spacing of the diaphragm space K ₃ or to provide an auxiliary space having a slightly larger cross-sectional area. It is preferable for sure achievement.

Molding step of non-skin portion After the formation of the skin portion 1 described above, as shown in FIG.
The valve gate G ₂ is opened, and immediately thereafter, the injection cylinder is operated again, and a predetermined amount of the second raw material (the first raw material remaining in the injection cylinder) is placed in the second space K ₂ . Was injected. Then, this raw material was vigorously filled in the second space K ₂ and the throttle space K ₃ . Then, the non-skin portion 1 was formed in the second space K ₂ , and the connecting portion 3 was formed in the restricted space K ₃ . In the molded product A thus produced, as shown in FIG. 6, the surface skin portion 1 and the non-skin portion 2 were integrated via the connecting portion 3.

Mold Release Process The above-mentioned molded product A was taken out by opening the mold 5 when cooling was completed. At this time, the locking shaft I ₁ is fitted into the locking groove 522d, and the sliding portion 52
2b was firmly fixed. In this way, unless secure the slide portion 522b, by the urging force of the spring S _1, S _2, easily float in the cavity mold 521 direction. When the mold is opened in such a state, only the non-skin portion 2 is the cavity mold 52.
This is because it is easy to adhere to 1. Then, as shown in FIG. 7 (the cavity mold 521 is omitted in the figure), after the mold opening is completed, the molded product A is ejected by a predetermined ejecting mechanism arranged in the core mold 522. An example of this ejecting mechanism is one in which a predetermined ejecting plate 8 to which an ejecting pin (not shown) is attached is moved by a hydraulic or pneumatic cylinder (not shown).

Further, when the extrusion of the molded product A is completed, the locking shaft I ₁ is removed from the locking groove 522d,
As shown in FIG. 1, the slide portion 522b is in a raised state. Then, by repeating the steps shown in (1) to (3) above, the molded product A can be continuously manufactured.
As described above, by using the present apparatus, it is possible to easily and quickly manufacture the molded product A in which the surface skin portion 1 and the non-skin portion 2 are integrated. Moreover, since the base material layer 12 of the surface skin portion 1 is formed by the injection compression molding method and the non-skin portion 2 is formed by the injection molding method, the appearance is excellent.

As a modification of this embodiment, as shown in FIG. 10, the slide portion 522b _{1 is provided} with a cavity mold 521.
The device arranged in m can be illustrated. Further, as shown in this modification, the slide portion 522b ₁ can be moved by a predetermined hydraulic pressure or pneumatic pressure cylinders S ₃ , S ₄ . Particularly, in this case, the cylinders S ₃ , S ₄ and the slide portion 522b ₁ can be moved while being synchronized with the opening / closing operation of the die 5m. In addition, each of the above spaces K _{1 to} K ₄
The number of arrangements, the arrangement method, and the like can be variously selected according to the specifications of the molded product. For example, as shown in FIG. 11, the second space K ₂₁
The device may be provided with the first spaces K ₁₁ and K ₁₂ on both sides of, respectively. As shown in FIG. 12, the molded product in this case has the surface skin portions 1n ₁ and 1n ₂ arranged on both sides of the non-skin portion 2n. In addition, the second space is formed on both sides of the first space, and as shown in FIG. 13, a device for manufacturing a molded product in which non-skin portions 2q ₁ and 2q ₂ are arranged on both sides of a skin portion 1q. May be. Furthermore, it is an apparatus for manufacturing a molded product in which a large number of skin-covered parts and non-skin-covered parts are alternately arranged, or a molded product in which the skin-covered part (non-skinned part) is surrounded by a non-skinned part (covered-skin) Good.

Further, the number of arrangement of the aperture space K ₃ , the arrangement method, the form, etc. are not particularly limited as long as the object of the present invention can be achieved. For example, FIG. 14 (a) [FIG. 15 (a)]
As shown in FIG. 5, the apparatus may be provided with a plurality of aperture spaces K ₃₁ , K ₃₂ (K ₃₃ , K ₃₄ ) that are apertured in a predetermined direction. In this case, as shown in FIG. 2B, the skin-covered part and the non-skinned part 2r (2s) are connected to the plurality of connecting parts 31r, 32r.
(31s to 33s) will be integrated. Further, a predetermined communication hole 36r (36s, 37s) is formed between these connecting portions (between 31r and 32r, etc.). Further, as shown in FIG. 16A, one diaphragm space K ₃₆ can be composed of a portion K ₃₆₁ narrowed in one direction and portions K ₃₆₂ , K ₃₆₃ narrowed in the other direction. . In this case, as shown in (b) of the same figure, one connecting portion 36t has portions 361t and 362 narrowed in different directions.
It is composed of t to 364t. Further, the connecting portions 31s to 33s shown in 15 (b) above and FIG.
Portions 362t to 364 of the connecting portion 36t as shown in (b).
The t can exhibit a function as a reinforcing rib that enhances the rigidity of the connecting portions 31s to 33s and 36t.

Further, in the above-mentioned Examples and Comparative Examples, the protrusion 521b for forming the diaphragm spaces K ₃ , K ₃₁ etc. is provided in the cavity mold 521, but even if it is provided in the core mold 522, both molds 521 and You may divide and provide in 522 one part at a time. Further, the molded product produced by using the apparatus of the above-described embodiment may have a so-called "protruding portion" 15u near one end of the surface skin 1u, as shown in FIG. However, since this "protruding part" often has a little inferior appearance, it is used as a functional surface (a surface that does not appear as an external appearance like a design surface at the time of mounting and is exclusively involved in joining with other members). preferable.

Further, in these molded products, for example, as shown in FIG.
As shown in (3), the portion surrounded by the surface skin portion 1, the non-skin portion 2, and the connecting portion 3 is likely to become a substantially groove-shaped space B. Therefore, the connecting portion 3 can be housed in this space B and can be made less visible from the design surface side of the molded product A. In addition, the skin portion 1 and the connecting portion 3
The boundary of can be put in this space B. In these cases, the appearance of the molded product produced is further improved. The present invention is not limited to the specific examples described above, and various modifications may be made within the scope of the present invention depending on the purpose and application. That is,
The present apparatus can also be used when manufacturing parts (for example, building materials) other than interior parts for automobiles.

[0041]

As described above, according to the present apparatus, it is possible to easily and quickly manufacture a molded product in which the surface skin portion and the non-skin portion are integrated. Moreover, since the base material layer of the surface skin portion is formed by the injection compression molding method and the non-skin portion is formed by the injection molding method, the appearance is excellent. Therefore, it is possible to manufacture an integrated molded product having an excellent appearance at a low cost with high manufacturing efficiency.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a skin material is set in a mold device of this embodiment.

FIG. 2 is a vertical cross-sectional view showing a state in which a first raw material is injected and arranged in the mold apparatus of this embodiment.

FIG. 3 is a vertical cross-sectional view for explaining a forming process of the surface skin portion.

FIG. 4 is a partial perspective view for explaining the form of a diaphragm space.

FIG. 5 is a partial vertical cross-sectional view for explaining the state of the first raw material in the molding space.

FIG. 6 is a vertical cross-sectional view for explaining a molding process of the non-skin portion.

FIG. 7 is a vertical cross-sectional view for explaining a mold releasing process of a molded product.

FIG. 8 is a vertical cross-sectional view of a molded product manufactured by the mold device according to the present embodiment.

FIG. 9 is a partial perspective view of a molded product manufactured by the mold device according to the present embodiment.

FIG. 10 is a vertical cross-sectional view of a mold device according to a modified example of this embodiment.

FIG. 11 is a vertical cross-sectional view of a mold device according to a modified example of this embodiment.

12 is a vertical cross-sectional view of a molded product manufactured by the mold device of FIG.

FIG. 13 is a vertical cross-sectional view of a molded product manufactured by a mold device according to a modified example of this embodiment.

FIG. 14 is a partial perspective view of a mold device according to a modified example of the present embodiment and a molded product manufactured by the mold device.

FIG. 15 is a partial perspective view of a mold device according to a modified example of the present embodiment and a molded product manufactured by the mold device.

FIG. 16 is a partial perspective view of a mold device according to a modified example of the present embodiment and a molded product manufactured by the mold device.

FIG. 17 is a vertical cross-sectional view of a molded product according to a modified example of this embodiment.

FIG. 18 is a perspective view for explaining a molded product according to a conventional example.

FIG. 19 is a vertical sectional view of a molded product according to a conventional example.

FIG. 20 is a vertical cross-sectional view of a mold device for injection compression.

FIG. 21 is a perspective view of a molded product according to a conventional example.

[Explanation of symbols]

A: molded article, 1; skin layer, 11; skin layer, H; skin material, 11a; skin layer, 11b, H ₁ ; foam layer, 12; base material layer, 2; no skin part, 3; connection Parts, 4; resin reservoir part,
521; Cavity type, 521b; Projection part, 522; Core type, 522a; Main body part, 522b; Sliding part, 52
2c; return pin, I; interlock mechanism, K ₁ ;
1st space (space for injection compression molding), K ₂ ; 2nd space (space for injection molding), K ₃ ; diaphragm space, K ₄ ; auxiliary space,
D: step, 61; first hollner nozzle (injection arrangement means), 62: second hollner nozzle (injection injection means).

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 45/00-45/84

Claims (4)

(57) [Claims] 1. A base material layer of a surface skin part having a skin material layer with a foam layer and a base material layer composed of a thermoplastic resin, a non-skin part composed of a thermoplastic resin, and the surface skin part. And a resin molding die for manufacturing a composite type thermoplastic resin molded product while integrally molding the non-skin portion and at least one connecting portion made of a thermoplastic resin. A device for molding a resin, the device including at least one drawing space, and a space for injection compression molding and a space for injection molding which are communicated with each other while being partitioned by each drawing space when the mold is clamped. A cavity mold and a core mold are provided which are in opposition to each other while forming a molding space, and the thermoplastic resin forming the base material layer in the injection compression molding space is opened by the mold opening of the molding die device. Sometimes the above cavity type or Injection arranging means for injecting and arranging in a region of the mold on the side of the injection compression molding space, a thermoplastic resin for forming the non-skin portion in the injection molding space, and the connections in the drawing spaces. A mold apparatus for resin molding, comprising: a thermoplastic resin for forming a portion, and an injection injection unit for injecting a thermoplastic resin into the injection molding space when the mold is clamped. 2. The cavity mold and the core mold in the mold clamped state are, in addition to the injection compression molding space, the injection molding space and the drawing spaces, the injection compression molding near the drawing spaces. The resin molding die device according to claim 1, wherein an auxiliary space that is continuous with the working space without being drawn is formed. 3. The resin molding die device according to claim 1, wherein the space width of each of the drawing spaces along each drawing direction is 0.5 to 3.0 mm. 4. The gap between the parting surface of the cavity mold and the parting surface of the core mold is 10 to 50 mm when the injection arrangement means performs the injection arrangement. The mold device for resin molding according to.