JPH06269581A - Manufacture of skin-bonded sheet - Google Patents

Abstract

PURPOSE:To position a skin material easily, and bond a pad material to the skin material correctly inside design grooves by engaging surface side overhanging parts of a core material with core material engagement grooves in protruding parts in a die for setting the skin material, and pressurizing the pad material for bonding both to each other by a bonding agent both and a layer of bonding agent at back side overhanging parts. CONSTITUTION:Core material engagement grooves 6 are provided at protruding parts 1a corresponding to design grooves 8 of a pad material 7 in a lower die 1. A skin material 2 having a core material 4 sewn at a sewing part 3 is turned over to be applied on the lower die 1 to engage surface side overhanging parts 5 of the core material 4 with the core material engagement grooves 6 to be positioned, they are clamped by clamp mechanism 10, and air in the lower die 1 is discharged to preform the surface material 2. An upper die on which the pad material 7 is set is moved down to set the sewing part 3 of the skin material 2 to the design grooves 8 of the pad material 7 while pressing the pad material 7, and the pad material 7 is bonded to the skin material 2 by fusing bonding agent between the skin material 2 and the pad material 7, and a bonding agent layer at back side overhanging parts 5a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention covers a pad material having a design groove formed on its surface with a skin material having a stitching portion formed at a portion corresponding to the design groove so as to bond the two together. The present invention relates to a method for producing a skin adhesive sheet as described above.

[0002]

2. Description of the Related Art Conventionally, a skin adhesive sheet in which a pad material having a design groove formed on the surface thereof is covered with a skin material having a stitching portion formed at a portion corresponding to the design groove, and both are integrally bonded,
The stitching part of the skin material is pushed into the design groove of the pad material to bond them, but the work of pushing the stitching part of the skin material into the design groove must be done manually, and positioning and pushing work takes time. In addition to this, there is a problem that heavy work with a high work load occurs. Therefore, Japanese Patent Laid-Open No. 61-279270
As shown in Japanese Patent Publication, a plug provided with a positioning pin is attached to a molding die, the stitching portion of the skin material is fixed by the positioning pin, and the plug is inserted into the design groove of the pad material to fix the stitching portion and the design groove. There is also a proposed method to match the work pieces, but this method can reduce the work load, but it cannot shorten the time required to set the skin material, and also avoids the occurrence of injury accidents due to the positioning pins. There was a problem of not having. Also, JP-A-61-27927
As disclosed in Japanese Patent Laid-Open No. 9-62, JP-A-62-22683 and the like, it is also proposed that a plate is sewn into the stitching portion of the skin material, the plate is positioned with respect to the mold and the skin material is bonded to the pad material. However, there is a problem that the plate in the pad material hinders the adhesion of the sewn portion to the design groove of the pad material and it is difficult to accurately bond the skin material and the pad material in the design groove.

[0003]

The problem to be solved by the present invention is to solve the above-mentioned problems so that the positioning of the skin material can be easily performed by the core material, and the skin material in the design groove of the pad material It is an object of the present invention to provide a method for manufacturing a skin adhesive sheet that enables mass production of high-quality vehicle seats and vehicle interior materials that are accurately bonded to each other at low cost.

[0004]

In the method for manufacturing a skin adhesive sheet according to the present invention, which solves the above-mentioned problems, a pad material having a design groove formed on a surface thereof has a stitched portion at a portion corresponding to the design groove. In a method of manufacturing a skin adhesive sheet in which a skin material formed on a surface of the skin material is adhered and integrated with each other, a positioning core material is bulged from both front and back surfaces of the skin material at a seam portion of the skin material. And sewn to form an adhesive layer on at least the surface of the backside overhanging portion of the core material, and a ridge corresponding to the design groove is formed on the mold surface, and the core material engaging portion is formed on the ridge. A mold for forming a skin provided with a mating groove is prepared, and a skin is set in the mold in an inverted shape in which the front side protruding portion of the core is engaged with the core engaging groove, and then the skin is formed. The pad material, which is pressed against the material, and is interposed between the skin material and the pad material, and the core. A pad material and a skin material is integrally bonded with the adhesive layer is formed on the back side extended portion of, and is characterized in that the removal of the front side projecting portion of the core member after demolding.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the illustrated embodiments. Reference numeral 1 denotes a lower mold as a mold for setting the outer skin 2 in which the outer skin 2 is set upside down, and a raised portion 1a corresponding to a design groove 8 of a pad material 7 described later is provided on the mold surface of the lower mold 1.
And a core material engaging groove 6 is provided in the raised portion 1a. The skin material 2 is formed by sewing a plurality of skin members so that a seam portion 3 is formed at a portion corresponding to a design groove of a pad material, which will be described later, and the melting point of the seam portion 3 is about 200 ° C to 220 ° C. A belt-shaped positioning core member 4 made of a synthetic resin material at a temperature of 0 ° C. is sewn at the same time by projecting a front side projecting portion 5 and a back side projecting portion 5a from both the front and back surfaces of the skin material 1, and is simultaneously stitched. The projecting portion 5 can be engaged with the core material engaging groove 6, and the core material 4 is inserted into the core material engaging groove 6.
Are engaged with each other, so that the sutured portion 3 of the skin material 2 becomes the pad 7
It will be inserted along the design groove 8 of the material without meandering.

Further, the core material 4 has a melting point of about 200 ° C. to 220 ° C. so that the back side overhanging portion 5a overhanging from the back surface of the skin material 2 is provided with an adhesive ability by heating. The melting point is about 1 only on the surface of the backside protrusion 5a made of the same material as
A thermoplastic adhesive layer 5c is formed only on the surface layer by applying a thermoplastic adhesive of 00 to 120 ° C. or by sticking a hot melt film having a melting point of about 100 to 120 ° C., which is inexpensive. However, at the expense of a slight increase in cost, the front side overhang 5 made of a thermoplastic synthetic resin having a melting point of about 200 ° C. to 220 ° C. and the melting point of about 100 to 120 ° C.
Back side overhang 5a made of thermoplastic adhesive synthetic resin at ℃
To form a thermoplastic adhesive layer 5c that exhibits adhesiveness by being melted by heating the entire back side overhanging portion 5a, or the back side overhanging portion 5a of the front side overhanging portion 5 can be formed. Not only can the core member 4 be made substantially T-shaped by laterally projecting from one end, but if the entire backside overhanging portion 5a is made of thermoplastic adhesive synthetic resin, the backside overhanging portion is heated by heating. Since 5a is completely melted, the adhesive strength is further improved, and since the backside overhanging portion 5a is not left on the pad material 7, there is also a preferable aspect in that the feeling of foreign matter is eliminated. Reference numeral 9 denotes an upper die that is opposed to the lower die 1 so as to be able to come into contact with and separate from the lower die 1, and the upper die 9 can hold a pad material 7 made of polyurethane foam or the like having a design groove 8 on its lower surface.

Reference numeral 10 is a clamp mechanism for clamping the hem end of the skin material 2 set in the lower mold 1, 11 is an exhaust hole for making the lower mold 1 a vacuum suction type, and the lower mold 1 is passed through the exhaust hole 11. When the inside pressure is reduced, suction pressure acts on the skin material 2 through a large number of pores 13 arranged on the lower mold surface, and the skin material 2
Is adapted to be preformed by being adsorbed on the lower mold 1. Reference numeral 12 denotes a heating fluid supply hole provided in the lower mold 1, such as a hot melt film in which steam or hot air supplied from the heating fluid supply hole 12 is interposed between the skin material 2 and the pad material 7 through the pores 13. The thermoplastic adhesive material is heated to give it an adhesive ability, and the skin material 2 is the pad material 7
Glued to. Further, in the above embodiment, the mold for the epidermis set is the lower mold, but it goes without saying that the mold for the epidermis set may be the upper mold or the relationship of the left and right molds may be used instead of the relationship of the upper and lower molds.

With this construction, the skin material 2 in which the core material 4 is sewn to the sewn portion 3 is put upside down on the lower mold 1 and bulged from the sewn portion 3 to the front side. If the front side overhanging portion 5 of the existing core material 4 is engaged with the core material engaging groove 6 provided in the raised portion 1a of the lower mold 1, the skin material 2 is easily positioned in the lower mold 1. Then, the hem end of the skin material 2 is clamped by the clamp mechanism 10. Then, when the skin material 2 is positioned and set in the lower mold 1, the air in the lower mold 1 is exhausted 11
The air is exhausted further and suction pressure is applied to the skin material 2 through the pores 13 provided on the mold surface to preform the skin material 2 along the mold surface. When the preform of the skin material 2 is completed in this way, the upper mold 9 on which the pad material 7 is preset is lowered to attach the suture portion 3 of the skin material 2 set inside out to the lower mold 1. The pad material 7 is pressed toward the back surface of the skin material 2 while conforming to the design groove 8 of the pad material 7, and steam or hot air is supplied from the heating fluid supply hole 12 of the lower mold 1 so that steam or hot air is supplied from the pores 13. Is a speech bubble,
The adhesive material in which the skin material 2 and the pad material 7 are interposed between each other and the adhesive material layer 5c on the surface of the back side protruding portion 5a of the core material 4 are melted by heating so that the adhesive ability is exhibited. The pad material 7 is bonded to the skin material 2.

When the pad material 7 is adhered and integrated with the skin material 2 in this way, the skin material 2 and the pad material 7 are cooled by the air supplied through the pores 13 of the lower mold 1 so that the adhesive strength is early. The upper die 9 is raised and the clamp mechanism 10 that clamps the skin material 2 is opened to release the molded product from the lower die 1. After removing the mold, the front side overhanging portion 5 of the core material 4 overhanging the surface of the skin material of the molded product may be removed from the stitched portion 3 to obtain a product. Since the back side overhanging portion 5a exerts an adhesive ability by heating, the design groove 8
Even in this area, the adhesion between the skin material 2 and the pad material 7 is accurate and a good-looking finish is obtained.

Further, as in the above-described embodiment, the skin set mold is made vacuum-suctionable having a large number of pores 13 on the mold surface, and the skin material 2 has a suction pressure acting on the skin material through the pores 13. If the preform is preformed, there will be no wrinkles left on the skin material 2, so that a higher quality product can be provided with a good yield. If the adhesive ability is exhibited by the heating fluid supplied through the pores 13 as a thermoplastic material that is melted by heating as described above, the adhesive surfaces can be more easily adhered. In this case, if the adhesive layer of the core material is pasted or applied only on the surface of the back side overhang made of the same material as the front side overhang, the cost is excellent, and the entire back side overhang is better than the front side overhang. Heat with low melting point A series of synthetic adhesive synthetic resins that are molded in series are excellent in terms of adhesive strength and do not remain on the pad material, so they are preferable in that the feeling of foreign matter can be eliminated. It is more preferable that the skin material 2 and the pad material 7 are cooled by the air supplied through the pores 13 of the lower mold 1 after being bonded and integrated so that the adhesive force is stabilized early.

[0011]

As is apparent from the above description, the present invention positions the skin material in the skin set type by the core material having the adhesive layer formed on the back side protruding portion attached to the stitched portion of the skin material. After setting, press the pad material toward the skin material with the adhesive material interposed between the skin material and the pad material, and bond the skin material and the pad material with the adhesive material, and at the same time intervene in the design groove. The sewn portion is also accurately bonded and integrated to the groove bottom of the design groove by the adhesive layer formed on at least the surface of the back side overhanging portion, so that the skin material and the pad material are completely integrated including the inside of the design groove. As a result of being adhered, a beautiful finish can be obtained without the meandering or rising of the seamed portion of the skin material, and it can be durable for a long time. Therefore, according to the present invention, a pad material having a design groove formed on the surface thereof is covered with a skin material having a stitching portion formed at a portion corresponding to the design groove, and the two are bonded and integrated with each other. It is an extremely big thing to bring to the industry as solving the problem of the sheet manufacturing method.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a process of a method of the present invention in which a skin material is set on a lower mold.

FIG. 2 is a cross-sectional view showing steps of the method of the present invention in which a pad material is pressure-bonded to a skin material.

FIG. 3 is an enlarged view of a sutured portion of a skin material according to the present invention.

FIG. 4 is a cross-sectional view showing the steps of the method of the present invention in which the front side overhanging portion of the core material is removed from the molded product of the present invention.

[Explanation of symbols]

 1 Lower mold 2 Skin material 3 Sutured portion 4 Core material 5 Front side overhanging portion 5a Back side overhanging portion 5c Adhesive layer 6 Core material engaging groove 7 Pad material 8 Design groove

Claims (6)

[Claims] 1. A skin adhesive sheet in which a pad material having a design groove formed on its surface is covered with a skin material having a portion corresponding to the design groove formed in a stitched portion so as to bond and integrate both. In the manufacturing method, a positioning core material is swelled from both front and back surfaces of the skin material to the stitched portion of the skin material and sewn to form an adhesive layer on at least the surface of the back side bulge portion of the core material. In addition, a mold for a skin set in which a raised portion corresponding to the design groove is formed on the mold surface and a core material engaging groove is provided in the raised portion is prepared, and the skin material is used as the core material in the mold. Adhesive material in which the front side overhanging portion is set in an inside-out shape in which the core material engaging groove is engaged, and then the pad material is pressed toward the skin material so as to be interposed between the skin material and the pad material. And an adhesive layer formed on the backside overhanging portion of the core material to bond and integrate the pad material and the skin material, A method for producing a skin adhesive sheet, comprising removing the front-side overhanging portion of the core material after removing from the mold. 2. The skin material is preformed with a suction pressure acting on the skin material through the pores so that the mold for the skin set has a large number of pores on the mold surface and is capable of vacuum suction. Manufacturing method of skin adhesive sheet. 3. The skin adhesive sheet according to claim 2, wherein the adhesive material and the adhesive material layer are made of a thermoplastic material which is melted by heating so that the adhesive ability is exhibited by a heating fluid supplied through the pores. Manufacturing method. 4. The adhesive layer of the backside overhanging portion of the core material is formed by being adhered or applied only to the surface of the backside overhanging portion made of the same material as the front side overhanging portion. Manufacturing method of skin adhesive sheet. 5. The adhesive material layer according to claim 3, wherein the entire backside overhanging portion of the core material is formed in a series by molding with a thermoplastic adhesive synthetic resin having a lower melting point than the front side overhanging portion. Manufacturing method of skin adhesive sheet. 6. The skin adhesive sheet according to claim 2, wherein the adhesive portion is cooled by air supplied through the pores of the lower mold after the skin material and the pad material are heat-bonded. Manufacturing method.