JPH0622896B2 - How to decorate resin molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method for decorating a resin molded product in which an outer skin is attached to the surface of a resin core material in, for example, automobile interior parts. Regarding

(Prior Art) In addition to having a flat surface on at least three sides on the upper surface,
When an epidermis is adhered to the surface of a resin core material having a descending surface forming an opening between the insides of the flat surfaces via an adhesive layer, for example, as shown in Japanese Utility Model Laid-Open No. 59-17929. There is a decoration method.

This is because the resin core material is set on the upper surface of the vacuum suction receiving jig, the heat-softened skin is stretched above the resin core material, and the skin and the vacuum suction receiving jig are brought close to each other. After the skin is bonded to the flat surface of the resin core, the air inside the skin is sucked through the suction port provided in the vacuum suction jig corresponding to the opening of the resin core. The body is drawn into the opening and joined to the descending surface of the resin core material.

(Problems to be Solved by the Invention) In the conventional decorating method as described above, by first bonding and adhering the skin to the flat surface of the resin core, the skin of the skin into the opening of the resin core is formed. Since the pull-in margin is limited, even if the skin is sucked and drawn into the opening of the resin core material, it is difficult for the skin to extend along the shape of the opening, and there is a locally thinned portion that causes damage. However, wrinkles and unevenness are likely to occur, and there is a problem in adhesiveness.

Therefore, the present invention, while preventing damage to the epidermis,
In particular, it is an object of the present invention to provide a method for decorating a resin molded product that can improve the adhesiveness of the skin to the descending surface of the resin core material.

[Structure of Invention]

(Means for Solving the Problem) The present invention relates to a resin core material 1 having a flat surface 3 that surrounds at least three sides on the upper surface and a descending surface 4 that forms an opening 2 between the flat surfaces 3 inside. In the method for decorating a resin molded product, which comprises attaching the skin 6 to the surface of the resin via the adhesive layer 7,
First, the resin core material 1 is set on the upper surface of the vacuum suction receiving jig 11, the heat-softened skin 6 is stretched above the resin core material 1, and then the vacuum suction receiving jig 11 is placed. The suction cylinder 20 is inserted through the opening 2 of the resin core material 1 and raised, the suction port 21 at the upper end of the suction cylinder 20 is brought into contact with the skin body 6 to adsorb it, and then the suction cylinder 20 is lowered. Then, the skin body 6 is pulled into the opening 2 of the resin core material 1 in a tensioned state, and the vacuum suction receiving jig 11 and the stretched skin body 6 are brought closer to each other and vacuum suction is performed, thereby 6 is closely bonded to the surface of the resin core material 1.

(Operation) In the present invention, after the skin body 6 is drawn into the opening 2 of the resin core material 1, the skin body 6 is closely bonded to the surfaces of the flat surface 3 and the descending surface 4 of the resin core material 1, A margin for retracting the skin body 6 into the opening 2 of the resin core material 1 is secured in advance so that the skin body 6 is stretched and locally thinned to cause damage or wrinkles or unevenness. To improve the adhesiveness of the skin 6 to the resin core 1, particularly the adhesiveness of the skin 6 to the descending surface 4 of the resin core 1.

(Embodiment) Hereinafter, a configuration of an embodiment of the present invention will be described with reference to the drawings.

FIG. 7 and FIG. 8 show a pillar garnish for automobile interior parts as an example of a resin molded product. In the resin core material 1 of this resin molded product, an opening 2 is formed on the inner side, and a flat surface 3 is formed so as to surround the opening 2 on three sides.
At the edge of the flat surface 3 facing the opening 2, a descending surface 4 that descends and inclines toward the inside of the opening 2 is formed, and a part of the outer edge of the flat surface 3 descends and inclines toward the outside. An inclined surface 5 is formed.

The skin 6 is attached to the surface of the resin core material 1 of the resin molded product via the adhesive layer 7, and the skin 6 is
A non-breathable skin material such as VC, foamed PVC, PP, PE, PPF, ABS or the like, or a non-breathable skin material 8 in which a backing layer is laminated on the back surface of a cloth having a flocked pile, and this skin material 8 And a urethane layer 9 laminated on the back surface of the.

Next, FIG. 1 shows a vacuum suction receiving jig 11. This vacuum suction receiving jig 11 has a decompression chamber 13 on a base 12 which is vertically moved by a driving means such as an air cylinder (not shown). The chamber frame 14 is fixed, and a receiving die 16 having a receiving surface 15 on which the resin core material 1 is placed is fixed on the decompression chamber frame 14. The decompression chamber 13 is a vacuum pump.
The decompression chamber 14 and the receiving surface 15 of the receiving mold 16 communicate with each other through a plurality of suction holes 18.

Further, the receiving surface 15 of the receiving mold 16 corresponding to the position of the opening 2 of the resin core material 1 is provided with a recessed portion 19, and the suction cylinder 20 is fitted and disposed so as to face the recessed portion 19 so as to be vertically movable. There is. The suction cylinder 20 is formed in a cylindrical shape having a suction port 21 at the upper end, a vacuum pump 22 is communicated inside the suction port 21, and an air cylinder connected to the lower part.
It is designed to be moved up and down by 23.

Then, a decorating method of attaching the skin body 6 to the surface of the resin core material 1 will be described.

First, as shown in FIG. 1, the resin core 1 is attached to the vacuum suction jig 11
It is set on the receiving surface 15 of the receiving mold 16 of. An adhesive 7a is applied to the surface of the resin core material 1 to which the skin 6 is attached.

Also, clamp the four sides above the set resin core material 1.
The skin body 6 sandwiched by 25 is stretched substantially horizontally in a tensioned state, a heater 26 is disposed above the skin body 6, and the skin body 6 is heated by energizing the heater 26. To soften. The heaters 26 may be arranged below or above and below the skin 6, depending on the type of the skin 6.

Then, as shown in FIG. 2, the air cylinder 23 is actuated to raise the suction cylinder 20, and the suction port 21 at the upper end of the suction cylinder 20 that rises through the opening 2 of the resin core 1 is softened to the skin body 6 Abut. Then, the vacuum pump 22 is operated to suck the skin 6 through the suction port 21 of the suction cylinder 20, and the skin 6 is adsorbed to the upper end of the suction cylinder 20.

Then, as shown in FIG. 3, the air cylinder 23 is operated to lower the suction cylinder 20, and as shown in FIG.
The skin 6 is pulled in together with the suction cylinder 20 descending into the opening 2 of the resin core 1 in a tensioned state. At this time, depending on the shape of the descending surface 4 of the resin core material 1, part or all of the skin body 6 drawn into the opening 2 in a tensioned state is joined to the descending surface 4 of the resin core material 1 and There are times when you don't.

Further, as shown in FIG. 5, the vacuum suction receiving jig 11 is raised (the clamp 25 of the skin body 6 may be lowered), and the skin body 6 is bonded to the flat surface 3 of the resin core material 1. At this time, the heater 26 is retracted from the upper region of the skin 6.

In this state, the epidermis 6 is in close contact with the shoulder 16a formed on the peripheral edge of the receiving die 16, a space 19a is formed between the epidermis 6 and the receiving die 16, and the epidermis 6 and the receiving die 6 are received. The space between the upper surface of the mold 16 and the upper surface of the mold 16 is almost airtightly shielded from the outside.

Then, as shown in FIG. 6, the vacuum pump 17 is operated to pass through the decompression chamber 13, the plurality of suction holes 18 and the recess 19 to form the skin 6
Air is sucked between the upper surface of the mold 16 and the upper surface of the receiving mold 16, and the skin body 6 is closely bonded to the surface of the resin core material 1.

In this way, after the skin 6 is drawn into the opening 2 of the resin core 1, the skin 6 is closely adhered to the surface of the resin core 1, such as the flat surface 3 and the descending surface 4, to thereby obtain the resin core. Material 1
It is possible to secure a margin for retracting the epidermis 6 into the opening 2 in advance, and to prevent the epidermis 6 from being stretched and locally thinned to be damaged or to cause wrinkles and unevenness.
Adhesion of the skin 6 to the resin core material 1, especially the resin core material 1
The adhesiveness of the epidermis 6 to the descending surface 4 can be improved.

Then, finally, the resin core material 1 to which the skin 6 is attached is removed from the vacuum suction jig 11, and the skin 6 is removed as shown in FIG.
The unnecessary terminal part is cut off, and a part of the terminal is wound on the back surface of the resin core material 1 to be fixed by adhesion.

The descending surface 4 of the resin core material 1 is not limited to an inclined surface that descends and slopes toward the inside of the opening 2, but includes a vertical surface that descends almost vertically.

〔The invention's effect〕

According to the present invention, after the skin body is drawn into the opening of the resin core material, the skin body is brought into close contact with the surface of the flat surface or the descending surface of the resin core material, whereby the skin material inside the opening of the resin core material is formed. Preliminarily secure a retractable margin of the body, it is possible to prevent the skin from being partially stretched and locally thinned and damaged, and it is possible to prevent wrinkles and unevenness from occurring, and the adhesiveness of the skin to the resin core material, In particular, the adhesiveness of the skin to the descending surface of the resin core material can be improved.

[Brief description of drawings]

1 to 6 are sectional views showing an embodiment of a method for decorating a resin molded product of the present invention, FIG. 7 is a perspective view of a resin core material, and FIG. 8 is a sectional view of a resin molded product. . 1 ... resin core material, 2 ... opening, 3 ... flat surface, 4 ...
Descending surface, 6 ... Skin, 7 ... Adhesive layer, 11 ... Vacuum suction jig, 20 ... Suction cylinder, 21 ... Suction port.

Claims (1)

[Claims] 1. An epidermis is attached to an upper surface of a resin core material having a flat surface surrounding at least three sides and a descending surface forming an opening between the flat surfaces via an adhesive layer. In the method of decorating a resin molded product, the resin core material is set on the upper surface of a vacuum suction receiving jig, and a heat-softened skin is stretched above the resin core material to form the vacuum suction receiving jig. The suction cylinder through the opening of the resin core material to raise the suction cylinder, and the suction port at the upper end of the suction cylinder abuts the skin to adsorb the suction cylinder, and the suction cylinder is lowered to remove the skin of the resin core material. It is characterized in that the skin is tightly joined to the surface of the resin core material by pulling it into the opening in a tensioned state, further bringing the vacuum suction jig and the stretched skin close to each other, and vacuum suctioning. A method for decorating resin molded products.