JPH0776050A - Manufacture of automotive interior material - Google Patents

Abstract

PURPOSE:To manufacture an automotive interior material almost free from a break, a crimp or a float in less manhours by performing the equivalent work to connecting a board base and graining a skin material in a compression step. CONSTITUTION:The split halves 4 of a molded board base W are allowed to be adsorbed into right and left top forces 3, 4 respectively, and an engagement part with two pieces of skin material S whose ends are provisionally fastened is thrust up into a recessed part 7 by an introduction plate 9b. Next, the flange Wa of the board base W in which the engagement part of the skin material S is held, is grasped by moving the right and left upper forces 3, 4 close to each other, and both skin material S and board base W are die-compressed using an upper compression force 1 and a lower compression force 9, and are bonded together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an interior material for an automobile, and more particularly to a method of manufacturing an interior material composed of the same or different kinds of skin materials separately attached to a board base material.

[0002]

2. Description of the Related Art Conventionally, in automobile interior materials, different kinds of skin materials, for example, fabric and vinyl chloride, are often divided and attached to a board base material in order to improve the design. This interior material manufacturing method includes a method of connecting the board base materials to each other after attaching the skin material to each of the divided board base materials, and a method of connecting the board base materials to the joint portion of the skin material to the one board base material. A groove is provided in the corresponding part,
A so-called wood graining method is generally known in which a skin material is attached to the board base material and a joint portion of the skin material is pushed into a groove.

[0003]

Among the above-mentioned manufacturing methods, the former method requires two steps, that is, the step of attaching the skin material and the step of connecting the board base material, and it takes a lot of man-hours and There is a problem that it is difficult to reduce the cost because the corresponding equipment is required. Also, in the latter method, since the groove width is narrowed aesthetically, it is necessary to apply a fairly strong force to push the joint part of the skin material into the groove, and tears, wrinkles, and floats easily occur in the wood grain part. There is a problem.

Therefore, according to the present invention, in the step of press-fitting the board base material and the skin material, the divided board materials are joined and the joint portion of the skin material is joined to the base material connecting portion (flange portion).
It is a technical problem to be solved to simultaneously perform the process of adhering to.

[0005]

To this end, the following method for producing an automobile interior material was created. That is, the present invention is a method for manufacturing an automobile interior material in which a board base material and a skin material are pressure-bonded to each other, and an end portion of one of the skin materials formed separately and the other skin. The end of the material is joined to form the joint in advance, and the joint is sandwiched between the joints of the board bases that have been molded into several pieces, and the sandwiched portion is attached to the board base. It is characterized in that the skin material and the board base material are clamped together after being gripped by the gripping portion provided on the side mold.

[0006]

[Function] Therefore, one of the clamping dies grips the joint portion of the board base material sandwiching the joint portion of the skin material, and the joint portion of the skin material is joined to the base material without being subjected to an excessive force. Since it adheres to the portion (flange portion), the skin material is unlikely to be torn, wrinkled, or floated at this portion. Next, in order to bond the skin material and the board base material together by die clamping, the board base material is connected, and the process of adhering the joint part of the skin material to the base material connecting part (flange part) and the sticking of the skin material. It can be worn in one step and is easy to manufacture.

[0007]

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the upper clamping die 1 has a two-part configuration in which an upper left die 3 and an upper right die 4 are slidably supported on a vertically moving top plate 2. The left and right cylinders 5 and 6 can move to and away from the mold 4 in the horizontal direction. On the split surface of the upper left mold 3 and the upper right mold 4, the recess 7 is formed by the surfaces 3a and 4a substantially perpendicular to the mold surface.
(Also referred to as a grip portion) is formed. The recess 7 extends in the direction perpendicular to the plane of the drawing.

Further, a large number of small-diameter through holes 3b, 4b are opened in the mold surfaces of the upper left mold 3 and the upper right mold 4, and the through holes 3b,
4b is connected to a suction pump (not shown) via chambers 3c and 4c and communication holes 3d and 4d. The through hole 3
b and 4b are connected to a plurality of systems of air circuits, and by operating a valve (not shown), air can be sucked for each system, and the board base material W and the skin S (described later in detail) can be used as a mold surface. Can be adsorbed to a predetermined area of the.

On the other hand, the pressing and lowering die 9 placed on the base 8
Includes an elevating member 9a formed so as to be retractable from the mold surface.
Is arranged at a position corresponding to the dividing surface of the upper clamping die 1, and the elevating member 9 a is vertically driven by the cylinder 10. On the upper end of the elevating member 9a, an insertion plate 9b that can be inserted into the recess 7 of the upper clamping die 1 is provided in a protruding manner. A cylinder 11 is provided at the left and right positions of the base 8,
A clamp 12 capable of gripping the end of the skin S is attached to the tip of the rod of the cylinder 11.

Further, a heater 13 for heating the skin S is provided between the pressing upper die 1 and the pressing lower die 9 which are vertically opposed to each other, and the heater 13 is the upper pressing die. At the time of descent of 1, it is adapted to retreat to a predetermined position.

Next, an example of the board base material W and the skin S will be described. The board base material W is a wood-based fiber material that has been molded in advance into a predetermined shape that is divided into two parts, and a flange Wa (also referred to as a connecting portion) is formed on each divided surface so as to project to the back surface side ( (See FIG. 1). In addition, the board base material W,
A rubber-based adhesive is applied in the pre-pressing process. Epidermis S
As shown in FIG. 7, the polypropylene foam layer P is formed on the back surface.
After slicing a fabric sheet F having PF and a vinyl chloride sheet PVC having a polypropylene foam layer PPF on the back surface to a fixed size, stacking them so that their respective design surfaces face each other and temporarily fixing them with a clinch tacker T Further, the end portion is cut along the cutting line L and shaped.

Next, the board base material W is formed by using the above-mentioned pressing die.
A method of pressing and adhering the skin S and the epidermis S will be described. As will be described in detail below, the skin S and the board base material W are partially pressed to form a tight surface before clamping the die. This tight surface is formed parallel to the design surface. These are divided into two types, that is, those that are formed and those that are formed perpendicular to the design surface, and will be described in order. First, the first method will be described. As shown in FIG. 1A, the cylinder 5,
6 is operated to separate the upper left mold 3 and the upper right mold 4 into the left and right to widen the space of the recesses 7, and the board base material W is placed on the mold surfaces of the upper molds 3 and 4, respectively, and The suction pump is operated to suck air through the through holes (not shown) to suck the board base material W on both mold surfaces. On the other hand, on the side of the pressing die 9, the rods of the cylinders 10 and 11 are projected, the end of the skin S is held by the clamp 12, and the temporarily joined joint of the skin S is inserted into the insertion plate 9.
The skin S is supported in a state of being pushed up at b and given a slight tension.

Next, the heater 13 is moved to a predetermined position opposed to the board base material W and the surface skin S to heat the adhesive applied to the board base material W to remove the solvent, and the surface skin S.
After heating and softening, the heater 13 is retracted. This state is shown in FIG. Subsequently, as shown in FIG. 1B, the clamping upper die 1 is lowered to an intermediate position, the joint portion of the skin S is inserted into the recess 7 by the insertion plate 9b, and the upper side of the elevating member 9a. 9c presses the epidermis S against the board base material W. FIG. 5A shows a state in which the portion A in the drawing is enlarged. In addition, almost simultaneously with pressing the skin S by the elevating / lowering member 9a, a vacuum pump (not shown) is actuated to move the through hole 3b,
Air is sucked from 4b and the skin S is adsorbed to almost the entire surface of the board base material W. Therefore, the skin S and the board base material W are in close contact with each other, and the end portion of the board base material W is joined to the skin S to form the tight surface C1.

Thereafter, as shown in FIG. 2, the cylinder 5,
The upper left mold 3 and the upper right mold 4 are brought close to each other at 6, and the flange Wa with the joint of the skin S sandwiched is pressed from the left and right to be bonded. FIG. 5B shows an enlarged view of the portion B in the figure. When the left and right upper molds 3 and 4 are closed, the upper side 9c of the elevating member 9a serves as a guide for the skin S, so that the skin S and the board base material W can slide on the upper side 9c while maintaining a close contact with each other. The board Wafer W is connected by adhering the facing Wa and the joint portion of the skin S to each other. For this reason, in the wood grain portion, tears, wrinkles, and floating are unlikely to occur in the surface skin on the design surface side.

As described above, the recess 7 of the upper clamping die 1
After the flange Wa of the board base material W and the joint of the skin S are gripped by the (gripping part), as shown in FIG.
The board base material W and the outer skin S are pressed together by the pressing lowering die 9 to be attached. Then, in order to ensure the connection of the board base material W, the flanges Wa are tacked together in a separate process.

Next, the second method will be described. Note that only the differences from the above-mentioned first method will be described, and description of other overlapping steps will be omitted. This method is for lifting members 9
The procedure is the same as that of the first method until the joint portion of the skin S is inserted into the recess 7 by the insertion plate 9b of a, but when inserted,
As shown in FIG. 6A, the upper side 9c of the elevating member 9a is stopped at a position where the skin S and the board base material W contact each other, and the skin S
Is not strongly pressed against the board base material W. Then, the left and right upper molds 3 and 4 are closed, and the flange W in the recess 7 is closed.
The a and the joint of the skin S are pressed from the left and right in the direction of the arrow to bond them. That is, the skin S and the board base material W are pressed by the flange Wa perpendicular to the design surface, and the two are bonded to form a tight surface C2.

Then, after the skin S is adsorbed onto almost the entire surface of the board base material W by a suction action of a suction pump (not shown), as shown in FIG. 6B, the upper side 9c of the elevating member 9a.
While pressing the outer skin S against the board base material W, the board base material W and the outer skin S are pressure-bonded by the upper pressing mold 1 and the lower pressing mold 9 as shown in FIG. According to this method, a force that causes a relative displacement between the board base material W and the skin S before and after the tightening is not applied, and therefore, in the wood grain part, the design surface side is broken or wrinkled in the skin. Lifting is unlikely to occur.

As described above, in this embodiment, the flange Wa of the board base material W is aligned with the recessed portion 7 of the pressing upper die 1 which is sufficiently spaced, and the joint portion of the skin S is attached thereto. After being inserted by the insertion plate 9b, the interval between the recesses 7 is narrowed and the flange Wa is pressed to join with the skin S. Therefore, as in the conventional graining process, the skin S
Since it is not forcibly pulled into the groove to push it into the groove, the skin S is less likely to be torn, wrinkled, or floated, and the product (interior material) looks good.

In the above-described embodiment, the flanges Wa are tacked together in a separate process after pressure tightening.
If the a and the joint portion of the skin S are pressed by the upper dies 3 and 4 on the left and right and tacked at the same time, the number of steps can be further reduced. Further, in the above-described embodiment, the upper clamping die 1 is divided into left and right parts, but the upper and lower clamping parts 1 may be divided upside down so that the lower clamping part 9 is divided.

[0020]

As described above, in the present invention, in the step of press-fitting the board base material and the skin material, the pre-separatedly formed board base material is joined and the joint portion of the skin material is joined to the base material. Since it is designed to be bonded to the flange (flange), the skin material is less likely to be torn, wrinkled, or floated, improving the quality of the interior material and reducing the number of manufacturing steps. There is an effect that it is possible to down.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a pressing mold, (a) showing a state before pressing with a board base material and an outer skin set in predetermined positions, and (b) showing a skin in a recess of the upper pressing mold. The state where the joint part of is inserted is shown.

FIG. 2 is a cross-sectional view showing a pressing die, showing a state in which the joint portion of the skin and the flange of the board base material are pressed by the left and right upper dies.

FIG. 3 is a cross-sectional view showing a pressing die, showing a state in which the pressing upper die is lowered to press the board base material and the skin.

FIG. 4 is an enlarged view for explaining how to insert the joint portion of the skin between the flanges of the board base material.

FIG. 5 is an enlarged view for explaining the first method of the embodiment, showing a state in which the lifting member presses the outer skin against the board base material, and (a) shows the board by the left and right upper molds. The state where the flange of the base material and the joint portion of the skin are pressed (b)
Shown in.

FIG. 6 is an enlarged view for explaining the second method of the embodiment, showing a state in which the flange of the board base material and the joint portion of the skin are pressed by the left and right upper dies, and then, The state where the skin is pressed against the board base material by the lifting member (b)
Shown in.

FIG. 7 is a diagram illustrating temporary fixing of the epidermis.

[Explanation of symbols]

 1 Upper clamping type 3 Upper left type 4 Upper right type 7 Recess (holding part) 9 Lower clamping type 9a Elevating member 9b Insert plate W Board base material Wa flange (connecting part) S Skin

Claims (1)

[Claims] 1. A method for manufacturing an automobile interior material in which a board base material and a skin material are pressure-bonded and bonded to each other, wherein an end portion of one of the skin materials formed separately and the other skin material. The joint is formed in advance by joining the ends of the board, and the joint is sandwiched by the connecting portions of each of the board bases molded in advance, and the sandwiched portion is attached to the board base mounting side. A method for manufacturing an interior material for an automobile, in which a skin material and a board base material are clamped and bonded together after being gripped by a grip portion provided in the mold.