JPH07246657A - Method and apparatus for producing interior material - Google Patents

Abstract

PURPOSE:To avoid the falling of flexible fibers on a surface caused by the softening thereof while shortening a treatment time and narrowing a warking space by pressing a base material and a skin material and heating a metal in a hot-melt adhesive by electromagnetic induction to melt the adhesive. CONSTITUTION:This apparatus is equipped with the flat lower bonding mold 13 having a square shape arranged on a base stand 10 and the upper bonding mold 11, which is made of a synthetic resin and formed into a box shape and has a square-shaped rear surface, provided on a vertically-movable base part 12 of a drive device and a plurality of electromagnetic induction coils 15 are arranged in the bonding mold 11. A plate-shaped wooden base material 1 and a skin material 3 are set between the upper and lower bonding molds 11, 13 so that an adhesive material 18 having the corresponding shape is interposed between both materials 1, 3 and the molds 11, 13 are clamped to excite the electromagnetic induction coils 15 for a predetermined time. By this constitution, metal foil 18b generates heat by electromagnetic induction to melt a hot-melt film 18a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automobile door trim,
The present invention relates to a method and apparatus for manufacturing an interior material in which a skin material is laminated and adhered on a base material such as a package tray.

[0002]

2. Description of the Related Art As shown in FIG. 3, a method of manufacturing an interior material of this type is to apply a two-component urethane adhesive 2 to a wood-based material 1 and then to cause volatilization of a diluent solvent and a preliminary reaction. Then, it is pre-dried in a drying furnace, and then the skin material 3 which has been pre-heated in order to secure the adhesive force is overlaid, and is hot-press bonded by an adhesive die.

[0003]

However, in this manufacturing process, there are problems in terms of the running cost for predrying and preheating, the time required therefor, and the like. There is also an environmental problem due to the volatilization of the diluting solvent.

In view of the above points, the present invention has an object to provide a method and apparatus for manufacturing an interior material of the kind mentioned at the beginning which does not require a preliminary step before the pressing step by an adhesive mold.

[0005]

In order to achieve this object, the present invention provides a method for manufacturing an interior material according to claim 1, wherein a skin material is overlaid on a base material and adhered in a pressed state by upper and lower adhesive dies. , At least one of the upper and lower adhesive molds is configured as a resin mold, and the base material and the skin material are set between the upper and lower adhesive molds with an adhesive material made of a hot-melt adhesive material containing a metal interposed therebetween. By pressing the base material and skin material with the upper and lower adhesive dies and attaching an electromagnetic induction coil to the resin die and exciting it with an AC power supply, the metal is heated by electromagnetic induction to melt the hot melt adhesive. It is characterized by

[0006]

The base material and the skin material are pressed between the upper and lower adhesive molds with the adhesive material interposed therebetween. At that time, the metal of the adhesive material generates heat at the boundary portion between the base material and the skin material due to electromagnetic induction in the electromagnetic induction coil. As a result, the hot-melt adhesive material is melted and the adhesive force is developed, and the base material and the skin material are simultaneously adhered in the pressing process.

[0007]

EXAMPLE A manufacturing apparatus for carrying out a method of manufacturing an interior material according to an example of the present invention will be described with reference to FIG. This device comprises a rectangular flat lower adhesive mold 11 installed on a base 10 and a base 12 of a vertical drive unit (not shown).
And a box-shaped lower surface corresponding to the corresponding square-shaped upper synthetic resin adhesive die 13,
A plurality of electromagnetic induction coils 15 are arranged therein. This electromagnetic induction coil is adapted to be excited by an AC power supply which is a commercial power supply, for example.

The film-like adhesive material 18 according to the present invention interposed between the wood-based base material 1 and the skin material 3 is a metal foil having a thickness of about 30 .mu. 18b is interposed as an intermediate layer. The film adhesive 18 can also be manufactured by dispersing and mixing metal particles, for example, iron particles, in an olefin-based hot melt material and molding the film into a film shape.

At the time of manufacturing the interior material, as shown in FIG. 1, the plate-shaped wood base material 1 and the skin material 3 are sandwiched between them by an adhesive material 18 having a corresponding shape, and the upper and lower adhesive molds 11, 1
It is set between 3 and clamped, and the electromagnetic induction coil 1
5 is excited for a predetermined time. As a result, the metal foil 18b generates heat by electromagnetic induction to melt the hot melt film 18a. Therefore, the wood-based base material 1 and the skin material 3 are
Instead of heating from the respective outer surfaces, they are simultaneously bonded in the pressing process by the adhesive force generated by internal heat generation.

The electromagnetic induction coil 15 may be formed by embedding the lower adhesive mold 13 made of synthetic resin, but as shown in FIG. 2, the lower adhesive mold 13 is provided with a downwardly facing flange portion 23a. Arrangement on the base surface 9 below 23 or on the base surface on the base 10 is also conceivable. As a result, even if the lower adhesive mold 23 is exchanged, the number or position of the adhesive molds can be changed to easily cope with the change, and versatility can be obtained.

[0011]

According to the method of claim 1, pressing and bonding can be performed at the same time, the manufacturing process can be simplified, the processing time can be shortened, and the working space can be reduced. Since the surface of the skin material is not directly heated from the outside, it is possible to avoid the occurrence of hair collapse caused by softening of the fur on the surface. The work environment can be improved by not using the two-component urethane adhesive.

[0012] In carrying out the method of the present invention, the hot melt adhesive containing metal is treated according to Claim 2 or Claim 3.
By dispersing the metal particles in the hot melt adhesive or inserting the metal foil in the hot melt adhesive as an intermediate layer, it is possible to effectively produce the hot melt adhesive without any problem.

According to the fourth aspect of the invention, in order to carry out the method of the present invention, the electromagnetic induction coil is simply attached to the electromagnetic field permeable adhesive type, and the apparatus is simple and compact. According to the apparatus of the fifth aspect, the electromagnetic induction coils are arranged on the base surface, so that it is possible to easily cope with adhesive types having various structures, and the versatility of the apparatus can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an interior material manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of a lower mold part according to another embodiment.

FIG. 3 is a diagram showing a manufacturing process of a conventional interior material.

[Explanation of symbols]

 1 Base Material 3 Skin Material 11, 13, 23 Adhesive Type 15 Electromagnetic Induction Coil 18 Adhesive Material

Claims (5)

[Claims] 1. A method of manufacturing an interior material in which a skin material is laid on a base material and adhered in a pressed state by upper and lower adhesive dies, wherein at least one of the upper and lower adhesive dies is constituted by a resin mold, and the upper and lower adhesive dies are formed. In between, a base material and a skin material are set by interposing an adhesive material produced by including a metal in a hot melt adhesive material, and the base material and the skin material are pressed by the upper and lower adhesive molds, An interior material manufacturing method, characterized in that an electromagnetic induction coil is attached to a resin mold and excited by an AC power source to heat the metal by electromagnetic induction to melt the hot melt adhesive. 2. The method for producing an interior material according to claim 1, wherein the metal is dispersed in particles in the hot-melt adhesive material. 3. The method for producing an interior material according to claim 1, wherein the metal is inserted into the hot-melt adhesive material in the form of a foil as an intermediate layer. 4. An interior material manufacturing apparatus comprising upper and lower adhesive dies for laminating a skin material on a base material and adhering them in a pressed state, wherein at least one of the upper and lower adhesive dies is made of resin, An electromagnetic induction coil excited by an AC power source is attached to the resin-made adhesive mold so that the metal contained in the hot-melt adhesive material interposed between the base material and the skin material is heated by electromagnetic induction. Equipment for manufacturing interior materials. 5. The interior material manufacturing apparatus according to claim 4, wherein the electromagnetic induction coils are arranged on the lower base surface of the lower resin mold.