JPH11291273A - Laminated molded product and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply produce a laminated molded product good in appearance and enhanced in quality by preventing the exposure of the end part of the product. SOLUTION: A laminated molded product 100 is constituted by surrounding a cushion material 101 by a skin material 102 and a synthetic resin material 103. Since the end part of the cushion material 101 itself is not exposed, appearance is not damaged. Since the end part of the skin material 102 and that of the synthetic resin material 103 are superposed in a hutt seam state, special processing such as the bending of end part or the like is dispensed with at the time of the production of the laminated molded product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated molded product having a skin material and a synthetic resin material provided with a cushion material interposed therebetween, and a method for producing the laminated molded product.

[0002]

2. Description of the Related Art Conventionally, an integrated skin product obtained by attaching a skin material to a synthetic resin material has been widely used as automobile parts, architectural / civil engineering members, furniture including various chairs, and the like. In manufacturing such a skin integral molded product, a skin material is generally attached to a synthetic resin material with an adhesive, and an end of the skin material is fixed to the synthetic resin material with a tacker. But,
In recent years, due to environmental issues such as recycling and the pursuit of reduction of manufacturing costs, the injection molding method and injection compression molding method of the skin integrated type, in which the skin material is bonded at the same time as the production of the synthetic resin molded product, has been adopted. .

The following is a conventional example of manufacturing a laminated molded product including a cushion material by injection molding or the like. For example, a method of setting a flexible sheet including a foam layer in a female mold, clamping the female mold and the male mold, and filling a synthetic resin between the flexible sheet and the male mold (conventional example 1) : Tokuho 2-18210). In addition, the skin material including the pad layer is arranged in the male mold, and the end thereof is pressed by the clamp mechanism. In this state, the female mold is advanced with respect to the male mold and clamped, and the male mold and the skin material are combined. There is a method in which a resin-filled layer is filled in between to produce a skin-integrated laminate, and the end of the skin-integrated laminate is treated with a plate when opening the mold (conventional example 2: JP-A-6-238691). Furthermore, the skin containing the urethane foam is arranged in the female mold with the end cross section bent in a U-shape, and the female mold and the male mold are clamped in this state, and between the male mold and the skin. There is a method of filling the molten resin and advancing the male mold with respect to the female mold so that the outer skin is bent inward at the edge of the male mold to treat the end (conventional example 3: JP-A-5-162168).

[0004]

However, in the conventional example 1, the end of the flexible sheet including the foamed layer is exposed. Becomes defective. Further, in order to prevent the foamed layer from being exposed from the end of the flexible sheet, the area of the outermost layer constituting the flexible sheet is increased, and after molding, the end of the skin material is folded back to the back of the molded article, Fixing work is required and productivity is reduced. Further, it is difficult to recover the foamed layer compressed by the resin injected into the mold, and the quality is deteriorated.

Further, in the conventional example 2, since the end processing of the skin-integrated laminate can be performed, the problem of poor appearance can be solved. However, in order to perform the end processing, a plate type and a cylinder operating this plate type are required. There is a problem that a device is required and a mold structure is complicated. Furthermore, since the shape of the final molded product is determined when the resin filled in the mold is compressed, the compression to the pad layer (foam) is limited. In other words, in order to improve the shapeability of the surface of the molded product, the filling pressure of the resin must be increased, but then, the cell density of the foam decreases, and sufficient elasticity of the laminated molded product is obtained. Can not do, and the quality is reduced. Further, in Conventional Example 3, the end treatment of the skin can be performed. However, in order to perform the end treatment, the mold structure becomes complicated, such as forming a specially shaped end surface on the edge of the male mold. There is a problem similar to that of the conventional example 2 that the shape of the final molded product is determined when the resin filled in the mold is compressed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated molded article which has good appearance without exposing an end portion, can improve quality, and can be easily manufactured, and a method for manufacturing the same. .

[0007]

Therefore, in the present invention,
In addition to surrounding the cushion material with a skin material and a synthetic resin material, these ends are polymerized in a palm shape to achieve the above object. Specifically, the laminated molded product of the present invention is a laminated molded product in which a skin material and a synthetic resin material are provided with a cushion material interposed therebetween, and the skin material and the synthetic resin material It is characterized in that it surrounds the material and is overlapped at the ends of the skin material and the synthetic resin material.

Here, the cushion material is made of a foamed synthetic resin such as foamed polyurethane or foamed polyester, and preferably has a large elasticity. Further, the skin material refers to a planar material laminated on the surface of the cushion material. As the skin material, any material can be used as long as it can wrap the cushion material, but examples thereof include a vinyl chloride resin sheet, a synthetic resin sheet such as a soft polypropylene sheet, a woven fabric, a nonwoven fabric, and a decorative pattern. A single layer sheet such as a printed film can be employed. Further, a laminated sheet or the like in which a foam or a thermoplastic resin is backed may be used for these sheets.
Further, synthetic resin materials include thermoplastic resins such as polypropylene, polystyrene, polyethylene, ABS, and polycarbonate; fillers such as talc, mica, and glass fiber; and additives such as antioxidants and coloring agents. And the like can be employed.

In the laminated molded article of the present invention, since the cushioning material has a structure surrounded by the skin material and the synthetic resin material, the end of the cushioning material itself is not exposed, so that the appearance is not impaired. . Furthermore, in the present invention, since the skin material and the synthetic resin material are polymerized in the shape of a palm at their ends, when manufacturing a laminated molded product by injection molding or the like, special processing such as bending the ends is performed. It is unnecessary and the mold structure is simplified. In addition, since the synthetic resin material only needs to be fixed to the skin material and does not necessarily have to be fixed to the cushion material, the filling pressure of the synthetic resin does not need to be increased. For this reason, since the cell density of the cushioning material does not decrease, it is possible to prevent the elastic force of the laminated molded product from lowering and to improve the quality.

Further, the laminated molded article may be used as a part of a chair. That is, the skin material may constitute the surface of the chair seat, and the synthetic resin material may constitute the attachment portion of the chair seat to the chair body. With this configuration, the seat portion of the chair is covered with the skin material, and the cushion material is not exposed, so that the appearance of the chair is improved. Moreover, since the elasticity of the laminated molded product itself is less reduced, the chair is comfortable to sit on. In addition, as a part of a chair, it can be applied not only to a seat but also to a backrest.

[0011] The method for producing a laminated molded article of the present invention comprises:
The cushion material was arranged such that the skin material had an area including the side portions and the ear portions only capable of wrapping the cushion material, and the skin material and the cushion material were directed toward the mold recess. In this state, it is attached to the female mold, and in this state, the female mold and the male mold are relatively close to each other, and thereafter, the synthetic resin material is injected and formed between the male mold and the cushion material by injection molding. The cover material and the synthetic resin material may be polymerized in a joint shape. That is, in the present invention, the laminated molded article is manufactured by an injection molding method.

In this manufacturing method, a cushion material is disposed substantially at the center of the skin material, and the cushion material is substantially wrapped around the skin material. That is, the remaining surface is covered with the skin material so that only one surface of the cushion material is exposed, and the end of the skin material protrudes from the exposed surface of the cushion material as an ear. On this occasion,
The skin material and the cushion material are fixed with an adhesive or the like as necessary. The cushion material wrapped with the skin material is set in the female mold, and the exposed surface of the cushion material is opposed to the male mold. In this state, the male mold and the female mold are relatively close to each other to perform mold clamping, and the molten resin is injection-molded between the male mold and the cushion material. When this molten resin is cured, it forms a synthetic resin material, and the synthetic resin material is fixed in a state where its end is polymerized with the skin material. Therefore, in the present invention, it is possible to manufacture a laminated molded product by a normal injection molding operation without using a special mold or a special device for performing an end treatment of the molded product, so that the laminated molded product can be manufactured. Manufacturing can be performed easily. Therefore, the manufacturing cost of the laminated molded product can be reduced.

Further, in the method of manufacturing a laminated molded product according to the present invention, after injecting the molten resin, the male mold and the female mold are relatively brought close to each other to compress and shape the molten resin, thereby forming a synthetic resin. A material may be provided, and the skin material and the synthetic resin material may be polymerized in a palm-shape manner, and the ears of the skin material may be cut by the male mold and the female mold. That is, in the present invention, the laminated molded product may be manufactured by an injection compression molding method. In this manufacturing method, similarly to the injection molding method described above, the cushion material wrapped with the skin material is set in the female mold, but the exposed surface of the cushion material is opposed to the male mold, and the ear portion of the skin material is formed. Is extended outward from the edge of the female recess. In this state, after closing the mold, injecting the molten resin between the male mold and the cushion material, and by relatively bringing the male mold and the female mold relatively close together, the resin is compressed and shaped to produce a synthetic resin. A material is provided, and the skin material and the synthetic resin material are polymerized in a palm shape, and the ears of the skin material are cut off at the edges of these molds. Therefore, the unnecessary trimming operation of the edge of the ear can be performed in a series of injection compression molding steps.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a laminated molded product according to one embodiment of the present invention is attached to a chair. In FIG. 1, a laminated molded product 100 according to the present embodiment constitutes a seat portion of a chair 200, and includes a cushion member 101 made of a slab and a cushion member 101 sandwiched between the cushion members 101. A skin material 102 and a synthetic resin material 103 provided respectively are provided. The skin material 102 constitutes the surface of the chair seat portion, and the synthetic resin material 103 constitutes an attachment portion to the chair body 201. The chair body 201 is provided on the bottom surface of a substantially flat rectangular base 202 having four rounded corners.
This is a general structure in which a leg 203 of a book is provided and a backrest 204 is provided on the back surface thereof.

The cushion material 101 is a base of the chair body 201.
Similar to 202, it has a substantially planar rectangular shape with four rounded corners, and is formed in a block shape with a thickness of 3 to 60 mm. Examples of the material constituting the cushion material 101 include synthetic resin foams such as polyurethane foam and polyester foam, and among the synthetic resin foams, those having a large elasticity are preferable. The skin material 102 covers the upper surface and four side surfaces of the cushion material 101, and is bonded and fixed to the cushion material 101 with an adhesive as needed. The skin material 102 is not particularly limited as long as it can wrap the cushion material. For example, a vinyl chloride resin sheet, a synthetic resin sheet such as a soft polypropylene sheet, a woven fabric, a cloth including a nonwoven fabric, or a decoration. A single-layer sheet such as a film on which a pattern or the like is printed can be employed. In the present embodiment, it is also possible to adopt a laminated sheet or the like in which these sheets are backed with a foam or a thermoplastic resin.

The synthetic resin material 103 is formed in a flat rectangular shape with a predetermined thickness and four rounded corners, and is formed by bending the end portions 103A of the four sides downward. On the lower surface of the synthetic resin material 103, a plurality of ribs 103B are formed so as to protrude. The end portion 103A of the synthetic resin material 103 and the side surface portion 102A protruding from the lower surface of the cushion material 101 of the skin material 102 are polymerized in a palm-shape manner, and these polymerized portions are fixed. Materials used as the synthetic resin material 103 include thermoplastic resins such as polypropylene, polystyrene, polyethylene, ABS, and polycarbonate, and general-purpose materials such as those obtained by adding a filler such as talc, mica, and glass fiber to these thermoplastic resins. The resin has a high melt index (MI). For example, when the material is polypropylene, MI = 10 to 20
0 g / 10 min, preferably MI = 40-100 g / 10 min.

FIG. 2 shows an injection compression molding machine 1 for producing the laminated molded article 100 of the present embodiment. The injection compression molding machine 1 is divided into a fixed mold 10A and a movable mold 10B, and the fixed mold 10A and the movable mold 1
By injecting the molten resin into the mold 10 in which the cavity 10C is formed during 0B, the laminated molded article 100 is molded. The injection compression molding machine 1 is provided with an injection device 1A for injecting a molten resin into a mold 10, a fixed die plate 3 on which a fixed mold 10A is fixed, and a movable mold 10B. And a mold clamping device 5 for moving the movable die plate 4 toward the fixed die plate 3
And a mold moving device 20 provided between the movable die plate 4 and the movable mold 10B and for moving the movable mold 10B forward and backward with respect to the fixed mold 10A.

The temperature of the molten resin injected into the mold 10 from the injection device 1A is the temperature of the material of the cushion material 101 and the skin material 102,
It is appropriately set depending on the material and fluidity of the molten resin itself.
Since the cushion material 101 and the skin material 102 are relatively weak to heat and pressure, the temperature of the resin is preferably low, for example, 140 ° C.
To 230 ° C, preferably 160 ° C to 200 ° C. Fixed mold 1
0A is a male type having a pressing protruding portion 10D, and a plurality of recesses 10F for forming ribs are formed on the pressing protruding portion 10D. The movable mold 10B is a female mold having a mold recess 10E in which the cushion material 101 wrapped in the skin material 102 is stored. The fixed mold 10A and the movable mold 10B are
This is a spigot structure in which D and the mold recess 10E fit. If necessary, a protective film or a protective sheet may be inserted between the cushion material 101 and an injection sprue (not shown) of the mold 10 in order to reduce damage to the cushion material due to high-temperature resin. Here, the mold 10 is set at a temperature of 10 ° C to 80 ° C, preferably 30 ° C to 50 ° C.

The movable die plate 4 is slidably provided along a tie bar 8 bridged between a fixed plate 7 to which a hydraulic cylinder device 6 for mold clamping is fixed and a fixed die plate 3. is there. The mold clamping device 5 has a toggle mechanism 9 to which a piston rod 6A of a hydraulic cylinder device 6 is connected, and applies a pressing force of the hydraulic cylinder device 6 to the toggle mechanism 9.
And the movable die plate 4 is moved forward, thereby clamping the mold 10. Here, between the movable die plate 4 and the fixed die plate 3, mold clamping pressure receiving blocks 3A and 3B are provided. When the movable die plate 4 is advanced, the mold clamping pressure receiving block 3A provided on the fixed die plate 3 abuts on the mold clamping pressure receiving block 3B provided on the movable die plate 4 side, and the toggle mechanism 9 is provided. Of the high-pressure mold clamping force.
The parallelism between the die plates 3 and 4 is ensured by the mold clamping pressure receiving blocks 3A and 3B.

The mold moving device 20 has a fixed substrate 21 attached to the movable die plate 4 and a moving substrate 22 which moves forward and backward with respect to the fixed substrate 21. The movable substrate 22 has a movable mold 10B mounted on the front surface thereof. The movable substrate 22 is slidably provided along a guide bar 23 planted on the fixed substrate 21 and is movable between the movable substrate 22 and the movable substrate 22. Is always urged toward the movable substrate 22 side by the tension spring 24 bridged between them. Between these fixed substrate 21 and movable substrate 22, a pair of inclined members 31 and inclined members
32 are provided. These inclined member 31 and inclined member
32 is an inclined surface 3 inclined with respect to the forward direction of the movable mold 10B.
1A and 32A respectively. These slopes 3
With the 1A and 32A in surface contact with each other, the inclined members 31 and 32
Are arranged along the forward direction of the movable mold 10B.

The inclined member 31 is provided so as to be movable on the surface of the fixed substrate 21 in a direction orthogonal to the direction in which the movable mold 10B advances, and is provided with a piston rod 34A of a hydraulic cylinder device 34 fixed to the fixed substrate 21. Connected to the tip. The tilt member 31 is moved toward the tilt member 32 by the hydraulic cylinder device 34. On the other hand, the inclined member 32 is fixed to the movable substrate 22. Here, since the inclined member 31 is movable, one of the inclined members 31 and 32 is movable relative to the other.

Such a mold moving device 20 includes an inclined member 31.
Is moved forward and backward with respect to the inclined member 32,
31 is moved forward and backward with respect to the inclined member 32, and
The movable mold 10B is moved to a position where the movable mold 10B is at an arbitrary distance with respect to the fixed mold 10A, and the movable mold 10B is moved to that position.
Can be temporarily fixed. In order to supply hydraulic pressure to the mold moving device 20, a hydraulic unit 30 is provided.
A control device is further provided for controlling the hydraulic unit 30 and causing the mold moving device 20 to perform a desired operation.
33 are provided. The control device 33 has a sequence control circuit such as a digital sequencer, and moves the movable mold 10B stepwise with respect to the fixed mold 10A or temporarily stops at a predetermined position and then moves. , Etc., can be set to be continuously performed.

Next, a first embodiment of the method for producing a laminated molded product according to the present invention will be described with reference to FIGS.
First, as shown in FIG. 3, a cushion material 101 previously cut into a predetermined shape is arranged at the center of a skin material 102. When placing the cushion material 101 on the skin material 102, the skin material 102
Side part 102A and ear part 1 just to wrap cushion material 101
Make the area including 02B. Cushion material 101
May be simply placed on the skin material 102 or may be adhered and fixed to the skin material 102 with an adhesive.

Next, the mold 10 is opened, and the skin material 10 is opened.
2 and the cushion material 101 are integrally mounted on the movable mold 10B with the skin material 102 facing the mold recess 10E (FIG. 1).
reference). In this state, the exposed surface of the cushion material 101 is opposed to the male fixed die 10A, and the ear 102B of the skin material 102 extended from the exposed surface of the cushion material 101.
Is bent outward from the edge of the mold recess 10E of the movable mold 10B. Also, care is taken so that the skin material 102 does not wrinkle. Therefore, use a pin or double-sided tape to
It is also possible to temporarily fix 2 and apply tension.

Further, the mold clamping device 5 is operated to move the movable die plate 4 toward the fixed die plate 3,
The mold clamping pressure receiving block 3B on the movable die plate 4 is brought into contact with the mold clamping pressure receiving block 3A on the fixed die plate 3 side. When the mold clamping device 5 is operated, the movable mold 10B approaches the fixed mold 10A and stops at a predetermined position. Both molds 1
0A and 10B are close to each other to such a size that the cushion material 101 and the skin material 102 are not crushed. Thereafter, the injection device 1A is operated, and the molten resin is injected between the fixed mold 10A and the cushion material 101 as shown in FIG. Next, FIG.
As shown in (B), the mold moving device 20 is actuated to move the movable mold 10B closer to the fixed mold 10A to mold.
Tighten 10 molds.

Then, the laminated molded product 100 is pressed by the mold concave portion 10E of the movable mold 10B and the pressing protruding portion 10D of the fixed mold 10A, and the end portions of the skin material 102 and the synthetic resin material 103 are formed. Are polymerized in a palm shape, and the laminated molded article 100 is manufactured with the ears 102B attached. Also, at this time, the pressing protrusion 10D
The ear 102B of the skin material 102 is cut off at the edge of the metal mold recess 10E. Here, the mold clamping force of the die 10 is
And the material of the skin material 102 are appropriately set.
In order not to damage the mold, a low clamping force is preferable, for example, 5 kg / cm ^{2 to} 200 kg / cm ² , preferably 10 k / cm ² .
g / cm ^{2 to} 50 kg / cm ² .

The laminated molded article 100 in the mold 10 is left for a predetermined time to cool. This cooling time is 100
Is set in relation to the material of each of the members constituting the above, for example, 30 seconds to 120 seconds. After the cooling time has elapsed, FIG.
As shown in (C), the mold moving device 20 is operated to separate the movable mold 10B from the fixed mold 10A, the movable die plate 4 is retracted, and the mold 10 is opened. After the mold 10 is opened, the laminated molded product is moved from the mold recess 10E of the movable mold 10B.
Take out 100 and discard unnecessary ears 102B.

According to the above-described embodiment, the following effects can be obtained. That is, the laminated molded product of the present embodiment
100 is provided with a skin material 102 and a synthetic resin material 103 with a cushion material 101 interposed therebetween, and since the skin material 102 and the synthetic resin material 103 have a structure surrounding the cushion material 101, Since the end is not exposed, the appearance is not impaired. In addition, since the end portions of the skin material 102 and the synthetic resin material 103 are superposed on each other, special processing such as bending the end portions is not required when the laminated molded product 100 is manufactured. Therefore, a special structure does not need to be adopted for the mold 10 and the like, and a normal mold 10 can be used. In addition, since the synthetic resin material 103 may be fixed to the skin material 102 and does not necessarily have to be fixed to the cushion material 101, the pressure of the synthetic resin injected into the mold 10 from the injection device 1A is increased. You don't have to. Accordingly, since the cell density of the cushion material 101 does not decrease, it is possible to prevent the elastic force of the laminated molded article 100 from decreasing and to improve the quality.

Further, since the laminated molded article 100 constitutes a seat portion of the chair 200, the chair 200 has a good appearance and a good sitting comfort. In other words, the skin material 102 constitutes the surface of the chair seat portion, and the synthetic resin material 103 constitutes the attachment portion to the chair body 201, so that the seat portion of the chair 200 is covered with the skin material 102, The material 101 is not exposed from the end. In addition, since the elastic force of the laminated molded product 100 itself is less reduced, the sitting comfort is good.

Further, in the method for manufacturing a laminated molded product according to the first embodiment, the cushion material 101 is arranged so that the skin material 102 has an area including the side portions 102A and the ear portions 102B that can wrap the cushion material 101. Then, the skin material 102 and the cushion material 101 are attached to the female movable mold 10B with the skin material 102 facing the mold concave portion 102E, and in this state, the movable mold 1 is mounted.
0B is brought close to the fixed mold 10A which is a male mold, and thereafter, a molten resin is injected between the fixed mold 10A and the cushion material 101,
After that, the synthetic resin material 103 is provided by compression, and the skin material 102 and the synthetic resin material 103 are polymerized in a palm-shape manner, so that a special mold or a special device for performing an end treatment of a molded product is used. No, the laminated molding 10
0 can be manufactured. Therefore, the production of the laminated molded article 100 can be easily performed, and the production cost of the laminated molded article 100 can be reduced.

In addition, in the method of manufacturing a laminated molded product according to the first embodiment, the movable mold 10B is brought close to the fixed mold 10A so that the edges of the molds 10A and 10B (the pressing protrusion 10D and the metal Mold recess
Since the ears 102B of the skin material 102 are cut at the edge of 10E), the work of removing the unnecessary ears 102B can be performed by a series of injection compression molding operations, thereby improving the manufacturing efficiency of the laminated molded product 100. it can.

Next, a second embodiment of the method of manufacturing a laminated molded product according to the present invention will be described with reference to FIG. The second embodiment differs from the first embodiment in which the manufacturing method of the laminated molded article is the injection compression molding method in the injection compression molding method, but the injection molding machine for implementing the second embodiment is the first injection molding machine. Since the structure is the same as that of the injection compression molding machine 1 of the embodiment, the description of the apparatus will be omitted or simplified. In this case, the mold moving device 2
0 is unnecessary. Also in the second embodiment, the skin material 102
The operation of wrapping the cushion material 101 is performed in the same manner as in the first embodiment. However, in the second embodiment, the skin material 102 is made to fit the size of the skin material 102 of the laminated molded product 100 as the final product, or to the extent that it protrudes more than that.
Set the length of 2B.

Next, the mold 10 is opened, and the skin material 10 is opened.
2 and the cushion material 101 are mounted on the movable mold 10B. In this state, the edge of the ear portion 102B of the skin material 102 extending from the exposed surface of the cushion material 101 is made to protrude from the edge of the mold concave portion 10E (see FIG. 5A). Further, the mold clamping device 5 is operated to move the movable mold 10B close to the fixed mold 10A to perform mold clamping. After that, the injection device 1A is operated, and FIG.
As shown in (1), a molten resin is injection-molded between the fixed mold 10A and the cushion material 101. Then, the synthetic resin material 103 is provided on the exposed surface of the cushion material 101, and the ends of the skin material 102 and the synthetic resin material 103 are polymerized in a palm-shape manner to manufacture the laminated molded article 100. Furthermore, in order to cool the laminated molded article 100 in the mold 10, it is left for a predetermined time as in the first embodiment. After the cooling time has elapsed, as shown in FIG. 5B, the mold clamping device 5 is operated to separate the movable mold 10B from the fixed mold 10A, and the mold 10 is opened. Mold 1
When the mold is opened at 0, the laminated molded product 100 is taken out from the mold recess 10E of the movable mold 10B. Next, the ears of the skin material 102 are cut.

Therefore, in the second embodiment, the same functions and effects as those of the first embodiment can be obtained. Further, in the second embodiment, the skin material 102 is formed on the side surface 102A according to the size of the skin material 102 of the laminated molded product 100 as the final product.
When the length is set, the extra ears 102B of the skin material 102 do not need to be cut at the time of mold clamping, and no dust is generated.

[0035]

Next, the effects of the present invention will be described based on specific examples. Based on the present invention, a laminated molded product using an injection compression molding machine, a mold and a molding procedure as described below
100 manufacturing. [Example 1] Example 1 employs the raw materials, the mold 10 and the injection compression molding machine 1 based on the above embodiment, and is used as a seat of the chair 200 in the injection compression molding method according to the first embodiment. This is an experiment for producing a laminated molded product 100. The details of the raw material, the mold and the injection molding machine are shown below.

A) Shape of laminated molded article 100: 400 mm in width and 400 mm in length b) Synthetic resin material 103: Type of resin: Block polypropylene (IDEMITSU PP J-5066HP) Melt index (MI): 50 g / 10 min 230 ℃ 2.16kgf c) Skin material 102: ・ Type; Cloth ・ Thickness: 1.5mm d) Cushion 101: ・ Type: Slab (polyurethane foam) ・ Thickness: 40mm e) Die: ・ Type; Structure ・ Gate ： Central point gate f) Injection compression molding machine 1: ・ Type ： Mitsubishi Heavy Industries injection molding machine (850MGW) (Injection compression specification) ・ Molding force ： 100 ton g) Resin temperature: 165 ℃ h) Gold Mold temperature: 40 ° C

I) Molding method (injection compression molding method) A slab is used as the cushion material 101, and this slab is cut to fit the size of the molded product (5 mm from the molded product).
Cut small). A cloth is used as the skin material 102, and the cut slab is attached to the cloth with an adhesive. The mold 10 is opened, and the slab attached to the cloth is set in the mold recess 10E of the movable mold 10B, which is a female mold. Here, the cloth is tensioned so that the cloth does not wrinkle, and is temporarily fixed to the mold 10 with a tape. The mold 10 is clamped, leaving a compression allowance of 50 mm. Inject the molten resin from the injection device 1A, then move the movable mold 10B in the direction of the fixed mold 10A by the mold moving device 20,
While compressing the resin, the ears of the cloth are cut with the spigot part of the mold 10. The mold is cooled, and then the multilayer molded article 100 is taken out of the mold 10. In the first embodiment, the laminated molded product 100 is a
Cloth and synthetic resin material 103 are directly adhered and fixed,
The cloth was also cut neatly, and a laminated molded product 100 having a good appearance could be obtained without a post-process such as trimming.

Comparative Example 1 In Comparative Example 1, the same molded article was molded in the same size as the skin material without cutting the slab in advance.
As a result, at the end of the molded product, the cloth constituting the skin material 102 and the synthetic resin material 103 do not adhere to each other, and the slab is exposed by the restoring force of the slab, and a molded product having a good appearance can be obtained. Did not.

Although the present invention has been described with reference to the preferred embodiments and examples, the present invention is not limited to these embodiments and examples, and various modifications may be made without departing from the gist of the present invention. And design changes are possible. For example, an apparatus for manufacturing the laminated molded article 100 is not limited to the above-described embodiment, and may be, for example, a general injection molding machine or a general injection compression molding machine.

Furthermore, although the laminated molded article 100 is configured as a seat of a chair, the laminated molded article of the present invention can be used for various uses, for example, furniture other than chairs, automobile parts, and construction / civil engineering parts. can do.

[0041]

As described above, according to the present invention, the appearance can be improved and the quality can be improved without exposing the end of the laminated molded product, and the production of the laminated molded product can be easily performed. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a laminated molded article 100 according to an embodiment of the present invention is attached to a chair.

FIG. 2 is a side view showing the entirety of the injection compression molding machine 1 for producing the laminated molded product 100 of the embodiment.

FIG. 3 is a perspective view illustrating a state in which a cushion material 101 is placed on a center portion of a skin material 102 for explaining a method of manufacturing a laminated molded product according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram for explaining an operation of a mold, which describes a method for manufacturing a laminated molded product by injection compression molding of the first embodiment.

FIG. 5 is a schematic diagram for explaining the operation of a mold for explaining a method of manufacturing a laminated molded product by injection molding according to a second embodiment of the present invention.

[Explanation of symbols]

 10 Mold 10A Fixed mold (male mold) 10B Movable mold (female mold) 10C Cavity 10E Mold concave section 100 Multilayer molded product 101 Cushion material 102 Skin material 102A Side surface 102B Ears 103 Synthetic resin material 200 Chair

Claims (4)

[Claims] 1. A laminated molded article having a skin material and a synthetic resin material provided with a cushion material interposed therebetween, wherein the skin material and the synthetic resin material surround the cushion material, and A laminated molded article characterized in that the ends of the material and the synthetic resin material are polymerized in a palm shape. 2. The laminated molded product according to claim 1, wherein the skin material constitutes a surface of a chair seat, and the synthetic resin material constitutes an attachment portion of the chair seat to a chair body. A laminated molded article characterized in that: 3. The method for manufacturing a laminated molded product according to claim 1, wherein the skin material has an area including a side portion and an ear portion that can wrap the cushion material. A cushion material is arranged, the skin material and the cushion material are mounted on a female mold in a state where the skin material is directed to the mold concave portion, and in this state, the female mold and the male mold are relatively close to each other, Thereafter, a synthetic resin material is injected and formed between the male mold and the cushion material to form a synthetic resin material, and the skin material and the synthetic resin material are polymerized in a palm-shape manner. Production method. 4. The method for manufacturing a laminated molded product according to claim 3, wherein after the molten resin is injected, the male mold and the female mold are relatively brought close to each other to compress the molten resin. The synthetic resin material is provided by shaping, the skin material and the synthetic resin material are polymerized in a palm-shape manner, and the ears of the skin material are cut by the male mold and the female mold. Manufacturing method for laminated molded products.