JPH11188796A - Method for mounting bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rigidly mount a bracket on a rear surface of an interior finish material for an automobile or the like for adhering a non-gas permeable plastic film to the rear surface. SOLUTION: A non-gas permeable plastic film 4 is heated to be melted and simultaneously or, after heating to be melted, adhered with a bracket 13 with an adhesive 14 at a bracket mounting part of a rear surface of an interior finish material 12. The adhesive is invaded from a rough surface 11 having a pinhole into the material 12, and an adhesive force is improved due to an anchoring effect. Accordingly, a bracket can be rigidly adhered to the material 12 in which the film 4 is adhered to the rear surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a bracket to, for example, a ceiling material of an automobile.

[0002]

BACKGROUND OF THE INVENTION For example, a bracket is attached to the back surface of a ceiling material of an automobile to support the ceiling material on a clip fixed to a vehicle body. As a ceiling material of an automobile, for example, a breathable material such as a polyurethane foam sheet or a fiber sheet impregnated with a synthetic resin may be used. However, if the ceiling material itself has air permeability, the air in the vehicle passes through the ceiling material, and at that time, dirt, dust, smoke of cigarettes, etc. contained in the air adhere to the surface of the ceiling material, and There is a problem that the surface is contaminated. Therefore, in order to block the air permeability of the ceiling material, a non-breathable film such as a polyamide film and a polyethylene film is attached to the back surface of the ceiling material. However, when a non-breathable film is adhered to the back surface of the ceiling material, the surface of the non-breathable film is smooth and is not easily compatible with the adhesive, and when the bracket is bonded with the adhesive,
There is a problem that the adhesive strength is reduced.

[0003]

2. Description of the Related Art Conventionally, the surface of a non-breathable film is rubbed with sandpaper or the like at a portion where a bracket on the back of a ceiling material is to be mounted, and then the bracket is bonded with an adhesive.

[0004]

In the above-mentioned conventional method, a step of rubbing the surface of the air-impermeable film with sandpaper or the like to obtain a rough surface is required, and there is a problem that the number of steps is increased and the productivity is reduced.

[0005]

According to the present invention, as a means for solving the above-mentioned conventional problems, an interior material comprising a synthetic resin-impregnated base material (1A) and a non-breathable plastic film (4) attached to the back surface (1A). At the bracket mounting portion (11) on the back of (12), a bracket mounting method of bonding the bracket (13) with an adhesive (14) simultaneously with or after heating and melting the air-impermeable plastic film (4). I will provide a. Adhesive (14) used for bonding the bracket (13)
Is preferably a curable adhesive.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in FIGS. Fig. 1 shows a raw material (1) of an interior material of an automobile ceiling material, and the raw material of the interior material (1) is attached to both sides of a core material (2) impregnated with a synthetic resin and the core material (2). A non-breathable plastic film (4, 4) is adhered to both sides of a base material (1A) made of a synthetic resin-impregnated glass mat (3, 3).

[0007] The synthetic resin impregnated core material (2) is polyethylene,
Polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, fluororesin, thermoplastic acrylic resin, thermoplastic polyester, thermoplastic polyamide, thermoplastic urethane Resin, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, thermoplastic synthetic resin such as acrylonitrile-butadiene-styrene copolymer, urethane resin, melamine resin, thermosetting acrylic resin, urea resin, phenol resin, epoxy It is made of a porous material such as a polyurethane foam sheet or a fiber sheet impregnated with a precursor such as a resin or a thermosetting synthetic resin such as a thermosetting polyester. Specific examples include, for example, tolylene diisocyanate, paraphenylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, hexamethylene diisocyanate, and 1,4-naphthalenedi isocyanate. , 4,4'-diphenyl diisocyanate,
4,4′-diphenylmethane diisocyanate, 3,
3'-dimethyl-4,4'-diphenyldiisocyanate, 3,3'-dimethyl-4,4'-diphenylmethanediisocyanate, 3,3'-dimethoxy-4,4'-
Diphenyl diisocyanate, 2-chloro-1,4-phenyl diisocyanate, 1-chloro-2,4-phenylene diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 2,2 ′, 5,
Polyvalent isocyanates such as 5'-tetramethyl-4,4'-biphenylene diisocyanate, m-xylylene diisocyanate, ω-xylylene diisocyanate, ω'-xylylene diisocyanate, and polyisocyanates thereof, and polyethylene adipate , Polytetrahydrofuran,
1,4-butanediol, 1,4-cisbutenediol, 1,5-dihydroxyethoxynaphthalene, 1,4
-A polyurethane foam sheet impregnated with an adduct of a polyhydric alcohol such as butynediol, polyester, poly (oxypropylene) polyol, poly (oxyethylene-propylene) polyol, acrylic polyol, castor oil dimer and tall oil dimer. The impregnation amount of the synthetic resin or the synthetic resin precursor is usually 20 to 40% by weight.

The glass mat (3, 3) is impregnated with the same synthetic resin or synthetic resin precursor as the synthetic resin-impregnated core material (2) at the same impregnation amount. A specific example is a glass mat (3, 3) impregnated with a melamine resin.

The non-breathable plastic film (4, 4) is, for example, a plastic film of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polyester, polyamide, etc. And usually has a thickness of about 5 to 30 μm.

Non-breathable plastic film on both sides
The raw material for interior material (1) to which (4, 4) is attached is set on the lower die (5) of a press-molding die composed of a lower die (5A) and an upper die (5B) as shown in FIG. , Molded into the shape of an automobile ceiling. For example, when a thermosetting sheet such as a polyvalent isocyanate-impregnated polyurethane foam sheet is used as the core material (2) of the interior material raw material (1), the molding is performed at a temperature of about 120 to 180 ° C. It is performed by hot pressing with a pressing pressure of 2-3 kg / cm ² . When a thermoplastic sheet such as a fiber sheet impregnated with a thermoplastic acrylic resin is used as the raw material for the interior material (1), after the raw material is heated and softened, it is 2-3 kg / kg.
It is performed by a cold press with a press pressure of cm ² , but in the case of a thermoplastic sheet, vacuum forming or vacuum forming with a press may be applied.

The interior base material (6) molded in the shape of an automobile ceiling is obtained in this manner. The interior base material (6) is composed of a lower mold (8A) and an upper mold (8B) as shown in FIG. Skin material crimping type consisting of
(8), the surface of the interior base material (6) surface material (7)
Is crimped. The skin material (7) is, for example, artificial leather, leather, fiber woven or woven fabric, nonwoven fabric, or a laminate of these with a plastic foam such as a polyurethane foam, a polyethylene foam, a polypropylene foam, or a polyvinyl chloride foam. On the back surface, a film (7A) of a hot-melt synthetic resin such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyester, polyamide or a web of fibers of these hot-melt synthetic resins Or a nonwoven fabric is stuck.

Next, as shown in FIG. 4, the interior base material (6) on which the surface material (7) is pressure-bonded is used as a skin material pressure-cooling type (9) comprising a lower die (9A) and an upper die (9B). ), And then cooled while being pressed to solidify the hot melt film (7A). As shown in FIG. 5, an electromagnetic induction heater (10) is provided at the bracket mounting portion of the lower mold (9A) of the crimping cooling type (9), and the electromagnetic induction heater (10) is shown in FIG. A metal plate (10B) disposed immediately above the coil (10A) as shown in FIG.
(10A) is energized to heat the metal plate (10B) by electromagnetic induction heating to heat the bracket mounting portion of the interior base material (6), and the air-impermeable plastic film of the interior base material (6)
(4) is heated by electromagnetic induction. When the air-impermeable plastic film (4) is a polyamide film, the heating temperature is, for example, 200 to 220 ° C.

As a result of the above heating, as shown in FIG. 6, the air-impermeable plastic film (4) on the back surface of the interior substrate (6) is melted at the bracket mounting portion, and the porous substrate (1A)
This penetrates the side, for example, the glass mat (3), and forms a rough surface portion (11) having a pinhole in this portion. In this way, as shown in FIG. 7, the non-breathable plastic film (4) is melted at the bracket mounting portion on the back surface to produce the interior material (12) having the rough surface portion (11) formed.

As shown in FIG. 8, a bracket (13) is adhered to a roughened surface (11), which is a bracket mounting portion of the interior material (12). In this case, adhesive is attached to the bearing surface of the bracket (13).
(14) is applied. Examples of the adhesive (14) include curable adhesives such as an unsaturated polyester adhesive mixed with a curing agent, an epoxy resin adhesive mixed with a curing agent, and a synthetic rubber adhesive mixed with a vulcanizing agent. However, a hot melt adhesive or the like can also be used. The adhesive (14) applied to the bearing surface of the bracket (13) is applied to the interior material (1).
2) Penetrates into the interior material (12) from the bracket mounting part (rough surface part (11) with pinholes) on the back side, and when a curable adhesive is used, it cures in this state and extremely strong adhesion Is obtained. In this way, as shown in FIG. 9, the bracket (13) is firmly attached to a predetermined position on the back surface of the ceiling material (12) as the interior material.

In the present invention, the bracket (13) may be bonded with the adhesive (14) at the same time as the non-breathable plastic film (4) of the interior substrate (6) is heated by electromagnetic induction. In this case, as shown in FIG. 10, a bracket support (10) is attached to an electromagnetic wave induction heater (10) of a lower mold (9A) of a skin material pressure bonding cooling mold (9).
C), and an adhesive is attached to the bearing surface of the bracket support base (10C).
(14) is cooled, the bracket (13) is set, and the skin material (7) is pressure-bonded to the surface of the interior base material (6).
A) is energized to directly heat the bracket (13) by electromagnetic induction.

In the above embodiment, the bracket mounting portion on the back surface of the ceiling material (12) is heated by electromagnetic induction. However, other normal electric heating, high-frequency heating, far-infrared heating and the like may be applied. In addition, the above-mentioned heating is performed simultaneously with the compression and cooling of the interior base material and the skin material, but may be performed separately from the compression and cooling step after the compression of the interior base material and the skin material. Further, in the present embodiment, a synthetic resin-impregnated glass mat is further adhered to both sides of the core material to reinforce it. However, if the core material has high rigidity, reinforcement by a glass mat is not necessary, and Can be used as a substrate. Furthermore, although the present embodiment is directed to ceiling materials, the present invention may be applied to other automobile interior materials such as door trims and rear parcels other than ceiling materials.

[0017]

According to the present invention, the air-impermeable plastic film is heated and melted at the bracket mounting portion on the back surface of the interior material, and the heat-melted plastic film penetrates into the base material to form a rough surface having pinholes. And
The affinity of the bracket for the adhesive is increased. In addition, at the time of bonding the bracket, the adhesive penetrates into the interior material from the rough surface portion having the pinhole, and the adhesive force is improved by the anchor effect. Therefore, in the present invention, the bracket can be firmly adhered even to an interior material in which a non-breathable plastic film is adhered to the back surface.

[Brief description of the drawings]

 1 to 9 show an embodiment of the present invention.

FIG. 1 is a partial side cross-sectional view of a raw material.

FIG. 2 is an explanatory diagram of a molding process.

FIG. 3 is an explanatory diagram of a skin material crimping process.

FIG. 4 is an explanatory view of a skin material pressure bonding cooling process.

FIG. 5 is a perspective view of a lower mold of a skin material pressure bonding cooling type.

FIG. 6 is an explanatory view of a heating state of a bracket mounting portion.

FIG. 7 is a rear perspective view of the molded ceiling material.

FIG. 8 is a perspective view of a bracket mounting portion.

FIG. 9 is a rear perspective view of the ceiling material with the bracket attached.

FIG. 10 is an explanatory view of a heating state of another bracket mounting portion.

[Explanation of symbols]

 1 Raw material for interior material 1A base material 4 Non-breathable plastic film 6 Interior base material 7 Skin material 11 Rough surface (bracket mounting part) 12 Ceiling material (interior material) 13 Bracket 14 Adhesive

Claims (4)

[Claims] At a bracket mounting portion on a back surface of an interior material in which a non-permeable plastic film is adhered to a back surface of a synthetic resin impregnated base material, the non-permeable plastic film is heated and melted, and at the same time, the bracket is bonded with an adhesive. Bracket mounting method characterized by the above-mentioned. 2. At a bracket mounting portion on the back surface of an interior material in which a non-breathable plastic film is adhered to the back surface of a synthetic resin-impregnated base material, the non-breathable plastic film is heated and melted, and then the bracket is bonded with an adhesive. Bracket mounting method characterized by performing 3. The bracket mounting method according to claim 1, wherein the adhesive is a curable adhesive. 4. The synthetic resin-impregnated base material comprises a polyvalent isocyanate-impregnated polyurethane foam sheet, and a melamine resin-impregnated glass mat adhered to at least the back surface of the polyvalent isocyanate-impregnated polyurethane foam sheet. Item 1. A bracket mounting method according to item 2 or 3.