JP3376577B2 - Molding method of laminated molded body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for a laminated molded body in which a skin material such as cloth is laminated on a thermoplastic resin core material containing wood fibers or the like such as a door trim of an automobile.

[0002]

2. Description of the Related Art A conventional method for molding a laminated molded article of this type is as follows:
The process was as shown in FIGS.

That is, the adhesive 3 is spray-applied from the nozzle 2 to one surface of the resin core material 1 which has been molded into a predetermined shape in advance, and then the resin core material is placed in the dryer 4 shown in FIG. Pass 1 and dry the adhesive 3.

Next, using the molding apparatus 5 shown in FIG.
The skin material 6 is stuck and laminated on the resin core material 1. That is, first, the resin core material 1 is set on the molding die 7 with the surface coated with the adhesive 3 facing upward. Next, the skin material 6 heated by a heater device (not shown) is positioned on the resin core material 1 with the outer peripheral portion thereof being sandwiched by the chuck 8. In this case, the skin material 6 is cut so as to have a size that protrudes from the resin core material 1 by a predetermined width.

Next, the skin material 6 is sucked through the suction passage 9 by a vacuum pump (not shown) mounted on the molding die 7. Suction of the skin material 6 through the suction passage 9 is performed through the resin core material 1. Since the resin core material 1 is a resin molded product mixed with wood fibers and the like, the skin material 6 can be sucked.

By the suction of the skin material 6,
The skin material 6 is formed following the shape of the resin core material 1, and the heat-treated skin material 6 is attached to the resin core material 1 by heating the adhesive 3.

Next, the outer peripheral portion 6b is cut by the cutter 10 while leaving a part of the portion of the skin material 6 protruding from the resin core material 1 as an adhesion margin 6a.

Thereafter, as shown in FIG. 11, the adhesive 3 is again spray-applied by the nozzle 2 to the back side of the adhesion margin 6a of the skin material 6, and then, as shown in FIG. The adhesive 3 is once dried.

After the adhesive 3 is dried, the adhesive 3 is again used.
Is heated to some extent, and the bonding margin 6a of the resin core material 1 is wound from the outer peripheral portion of the resin core material 1 to the other surface by a winding device (not shown), and the skin material 6 is applied to the resin core material 1 as shown in FIG. The attached laminated molded body 11 is completed.

[0010]

However, according to such a method for forming a laminated molded body, the adhesive applying step includes two steps, ie, the applying step of the resin core material 1 and the applying step of the adhesive margin 6a of the skin material 6. A process is required, and each of these coating processes must be followed by a drying process and a heating process.

Further, after the resin core material 1 or the adhesive material 6a of the adhesive material 6a of the skin material 6 is applied, a curing step of the adhesive agent 3 is usually performed before proceeding to the next molding step or winding step. In order to include the curing step, it was necessary to stock a certain number of laminated molded bodies 11 after applying the adhesive.

Further, since the adhesive is applied to the resin core material 1 on the surface of the resin core material 1 in which the wood fibers are mixed, the application amount and the application pattern are varied, and this variation is caused. Therefore, problems such as peeling between the skin material 6 and the resin core material 1 are likely to occur.

Therefore, the present invention has been made by paying attention to such a conventional technique, and provides a method for forming a laminated molded body in which the number of adhesive steps is reduced and the problems such as peeling are eliminated. Is intended.

[0014]

DISCLOSURE OF THE INVENTION In view of the above-mentioned object, the present invention is to mount a preformed resin core material on the molding surface of a molding die and set the skin on the resin core material. in the molding method of the molded laminate of attaching molding the skin material to the resin core member through an adhesive by vacuum forming the wood, coated on the back side over the entire surface in advance the made larger in girth than the resin core member said surface material either by heating after once dried <br/> was cloth bonding agent, or adhesive agent kept heated by attaching an adhesive film coated, then the adhesive was applied in said surface skin material backside side, so that the outer peripheral portion of said surface skin material protrudes a predetermined dimension, set on one surface of said resin core member which is placed on the molding die, so to follow a pre-Symbol skin material to the shape of the resin core member before together by vacuum forming pasting a skin material to the resin core member by the molding die in
A part of the protruding portion of the outer peripheral part of the skin material was left with an adhesive margin.
Cut in the state , then, of the skin material to the resin core material
It is characterized in that the partial adhesive margin formed on the outer peripheral portion is rolled up and adhered to the other surface of the resin core material.

According to the method for forming a laminate having the above-mentioned structure, since the adhesive is applied to the entire back surface side of the skin material, the adhesive applying step can be performed in one step. The drying step and the heating step can be combined into one step.

Further, since the adhesive is applied to the skin material, it is possible to suppress variations in the application amount and the application pattern as compared with the case where it is applied to the resin core material as in the conventional case, and the occurrence of peeling defects is reduced. Therefore, the quality can be improved.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for molding a laminated molded article according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 7 show a molding apparatus for carrying out the method for molding a laminated molded body according to the above-mentioned embodiment, and FIGS. 1 to 6 are vertical sectional views of the molding apparatus, respectively. Each molding step is shown in sequence, and FIG. 7 is a plan view showing a part of the molding step.

The above-mentioned forming apparatus is generally provided with a forming die 21 which can be moved up and down by a cylinder device 29 with respect to an apparatus table (not shown), a clamping mechanism and winding device 22 for a skin material 36, a heating device 23 and a skin material cutting. The device 24 is provided.

The molding die 21 has a bulging portion 21a at the center thereof, and the bulging portion 21a is provided with a molding surface 21b conforming to the shape of the resin core material 31 which has been molded in advance. The suction passage 26 of the vacuum pump 25 is opened in the molding surface 21b. Further, a resin coating layer 27 formed by coating a fluororesin or the like is formed on the side wall portion of the bulging portion 21a and the peripheral shelf portion 21c, and the resin coating layer 27 is surrounded by the resin coating layer 27.
A cutter receiving portion 28 made of silicon rubber or the like is formed.

The clamp mechanism / winding device 22 is composed of a plurality of parts so as to surround the molding die 21 (see FIG. 7), and the support shaft 32 installed on the device table and the support shaft 32. It has a clamp portion 33 of a skin material 36 attached to the support member 32 and a winding portion 34 which is also attached to the spindle 32 so as to be movable in the horizontal direction. A winding tool 35, such as silicon rubber, which is elastically deformed, is installed at the tip of the winding section 34.

The skin material cutting device 24 is a cylinder device 3.
2 is configured to be movable up and down, and a cutter 42 having a sharp tip is attached.

The heating device 24 has a pair of heater portions 43 for heating the skin material 36 from above and below.

In the molding apparatus configured as described above,
In order to mold the laminated molded body, first, the entire back surface, which is one surface of the skin material 36, is pre-coated with an adhesive and then dried. The adhesive to be pre-coated uses, for example, a two-component polyolefin-based agent, and the amount of the curing agent is appropriately adjusted so that the crosslinking density becomes a level at which heat can be activated. Further, instead of applying the adhesive, a film-shaped adhesive sheet may be attached, and in this case, the drying step is unnecessary.

Then, in order to actually form the laminated compact, as shown in FIG. 1, the forming surface 21b of the forming die 21 is formed.
A resin core material 31 which has been molded into a predetermined shape is set in the. As shown in FIG. 7, the skin material 36 is carried out from the skin material storage space 46 onto the slide table 47, and then the slide 47 is slid to move the skin material 36.
The outer peripheral portion of the skin material 36 is sandwiched by the clamp portions 33 with the adhesive application side of the lower side facing downward, and the adhesive is heated by the heater portion 43 of the heating device 23. At this time, the outer peripheral portion of the skin material 36 protrudes from the resin core material 31 by a predetermined dimension.

Next, as shown in FIG. 2, a vacuum pump 25
Is operated to suck the skin material 36 from the suction passage 26 and mold the skin material 36 so as to follow the outer shape of the resin core material 31.

Next, as shown in FIG. 3, the skin material cutting device 24 is lowered so that a portion 37 of the skin material 36, which extends from the resin core material 31, at the tip of the cutter portion 42 is partially bonded. Then, the cutter portion 42 is pressed against the cutter receiving portion 28 so as to be cut. At this time, the adhesion cost 38
Is not adhered to the molding die 21 side by the resin coating layer 27.

Next, as shown in FIG. 4, the skin material cutting device 24 is raised to the initial position, and the winding portion 34 of the winding device 22 serving as the clamp mechanism is horizontally moved toward the center of the molding die 21. By the winding tool 35, the adhesion margin portion 38 of the skin material 36 is bent so as to wind up the end of the resin core material 31.

Next, as shown in FIG. 5, the molding die 21 is lowered to a predetermined position, and the adhesion margin portion 38 of the skin material 36 is formed.
Then, the winding tool 35 is pressed. As a result, the winding tool 35 is elastically deformed so as to conform to the terminal shape of the resin core material 31, and the adhesion margin 38 is wound and bonded from the end of the resin core material 31 to the back surface side.

Next, as shown in FIG. 6, the molding die 21 is raised again to release the pressure contact of the winding tool 25 to the adhesion margin portion 38, and the skin material 36 is laminated on the resin core material 31 to complete the process. The formed laminated molded body 30 is moved onto the take-out table 49 so that the worker 48 can take it out.

According to the above-described molding method, since the adhesive is pre-coated on the entire back surface side of the skin material 36, the conventional adhesive coating process is performed in the winding portion of the resin core material and the skin material. The two steps performed in two steps can be performed in one step, and accordingly, the heating step can be performed in one step.

Since the adhesive is applied to the skin material,
Compared with the case of applying the resin core material as in the conventional case, it is possible to suppress the variation in the coating amount and the coating pattern, reduce the occurrence of peeling defects, and improve the quality. Such a thing can be more prominently exhibited by a method of applying a film-shaped adhesive sheet as an adhesive.

[0033]

EFFECTS OF THE INVENTION According to the present invention, when a skin material is attached and molded on a resin core material with an adhesive, the adhesive is applied to the entire surface of the skin material in advance. The agent applying step can be performed in one step instead of performing two points of the winding portion of the resin core material and the skin material in two steps, and accordingly, the heating step can be also one step.

Since the adhesive is applied to the skin material,
Compared with the case of applying the resin core material as in the conventional case, it is possible to suppress the variation in the coating amount and the coating pattern, reduce the occurrence of peeling defects, and improve the quality. Such a thing can be more prominently exhibited by a method of applying a film-shaped adhesive sheet as an adhesive.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a molding apparatus for carrying out a method for molding a laminated molded body of the present invention, showing a set state of a resin core material and a skin material.

FIG. 2 likewise shows a step of adhering and forming a skin material.

FIG. 3 similarly shows a cutting step of the outer peripheral portion of the skin material.

FIG. 4 likewise shows a process of bending the skin material to the resin core material end.

FIG. 5 likewise shows a process of winding the skin material from the resin core material end to the back surface side.

FIG. 6 also shows a step of taking out the laminated molded body.

FIG. 7 is a plan view showing a cutaway part of a molding apparatus for carrying out the method for molding a laminated molded body of the present invention.

FIG. 8 is a schematic perspective view showing a step of applying an adhesive to a resin core material by a conventional method for molding a laminated molded body.

FIG. 9 is also a schematic perspective view showing a heating step of the resin core material.

FIG. 10 is a vertical cross-sectional view of a molding apparatus used in a conventional method for molding a laminated molded body.

FIG. 11 is a schematic perspective view showing a step of applying an adhesive to a skin material by a conventional method for molding a laminated molded body.

FIG. 12 is also a schematic perspective view showing a heating step of the adhesive applied to the skin material.

FIG. 13 is a perspective view of a laminated molded body formed by a conventional method for molding a laminated molded body as viewed from the back surface side.

[Explanation of symbols]

21 Mold 22 Clamping mechanism and winding device 23 Heating device 24 Skin material cutting device 25 vacuum pump 26 Suction passage 30 Laminated body 31 Resin core material 37 Overhanging part 38 Adhesion allowance

Claims (2)

(57) [Claims] 1. A resin core material, which is molded in advance, is placed on the molding surface of a molding die, and a skin material set on the resin core material is vacuum-molded to form a resin via an adhesive. In a molding method of a laminated molded body, in which a skin material is pasted and molded on a core material,
Kept heated after pre once dried adhesives coated cloth to the back side over the entire surface of the large becomes the surface material of the girth of a resin core material, then the back side coated with adhesive said surface skin material, The outer peripheral portion of the skin material is set on one surface of the resin core material placed on the molding die so that the outer peripheral portion thereof protrudes by a predetermined dimension, and the molding die is formed so that the skin material follows the shape of the resin core material. before together by vacuum molding by the mold pasting a skin material to the resin core member
A part of the protruding portion of the outer peripheral part of the skin material was left with an adhesive margin.
Cut in the state , then, of the skin material to the resin core material
A method for molding a laminated molded article, characterized in that the partial adhesive margin formed on the outer peripheral portion is rolled up and adhered to the other surface of the resin core material. 2. A resin core material, which has been molded in advance, is placed on the molding surface of a molding die, and a skin material set on the resin core material is vacuum-molded to form a resin via an adhesive. In a molding method of a laminated molded body, in which a skin material is pasted and molded on a core material,
An adhesive film coated with an adhesive is pasted and heated on the entire back surface of the skin material having a larger peripheral dimension than the resin core material in advance, and then the back surface side to which the adhesive film of the skin material is pasted is attached. , Set on one surface of the resin core material placed on the molding die so that the outer peripheral portion of the skin material protrudes by a predetermined dimension, and the molding is performed so that the skin material follows the shape of the resin core material. Vacuum molding is performed by a mold to adhere the skin material to the resin core material, and the outer peripheral portion of the skin material is not exposed.
Part of the adhesive allowance formed on the outer peripheral portion of the skin material with respect to the resin core material is wound on the other surface of the resin core material so as to be stuck. A method for molding a laminated molded article, comprising: