JP3091364B2 - Manufacturing method of automotive interior material with skin material adhered to substrate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an automobile interior material in which a skin material is adhered to a base material capable of efficiently mass-producing an automobile interior material of excellent quality.

[0002]

2. Description of the Related Art For example, an automobile interior material in which a skin material is adhered to a substrate such as an automobile door trim is placed above the lower mold with respect to the surface of the substrate set in the lower mold having a vacuuming function. It is common practice to vacuum-elongate and soften a skin material that is placed in a position where the periphery is clamped and softened (see, for example, Japanese Patent Publication No. Sho 62-10819).

However, in this type of conventional method,
When the skin material is heated and softened, the center part will draw down, especially if the skin material is a vinyl chloride resin type, or if the thickness, rigidity, etc., the drawdown part contacts the base material. There was sometimes. When the drawdown portion comes into contact with the base material in this manner, a forced tensile force acts in the surface direction of the skin material at the portion where the drawdown portion comes into contact, and the foam laminate layer on the back side of the skin material is broken. As a result, there is a problem that irregularities are generated on the design surface. In order to solve such problems, the tolerance of the product mark of the skin material is tightened, the design shape of the base material surface is made simple to make it difficult to contact, and the contact with the base material during the drawdown of the skin material is prevented Therefore, there is a restriction that a special mask jig needs to be used, and there is a problem that the productivity is low and the production cost is high.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and to produce a high-quality product having no irregularities even if the substrate surface has a complicated design shape. The present invention has been completed for the purpose of providing a method of manufacturing an interior material for an automobile in which a skin material is adhered to a base material which is excellent in productivity and can achieve a significant cost reduction.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method of manufacturing an automobile interior material in which a skin material is adhered to a base material according to the present invention is set in a lower mold having a vacuuming function. Of interior materials for automobiles in which the softened skin material is placed in a state where the peripheral edge is clamped to the upper position of the lower die with respect to the surface of the base material, and the softened skin material is attached and integrated. In the method, an outer wall frame that rises and falls along the lower mold peripheral surface is provided outside the lower mold and is raised until it comes into contact with the skin material, and in this state, the lower mold is raised to lower the lower mold and the outer wall frame.
Increase the internal pressure of the enclosed chamber surrounded by the skin material,
In prevented from contacting the substrate pushes up the drawdown portion of the skin material central portion formed by softening treatment, and is characterized in that to perform subsequently evacuated while lowering the outer wall frame .

[0006]

Next, the present invention will be described in detail with reference to the drawings. The drawings show a case in which a door trim of an interior material for an automobile is formed. In the drawings, reference numeral 1 denotes a lower mold having a vacuuming function; 2 denotes a cylinder for moving the lower mold 1 up and down;
Is a clamper located above the lower mold 1 for clamping the periphery of the skin material 10, and 11 is a base material for door trim set on the lower mold 1; It is basically the same as an apparatus for manufacturing an interior material for an automobile in which a skin material is adhered to a material.

Reference numeral 4 denotes an outer wall frame provided outside the lower die 1 so as to be raised and lowered along the peripheral surface of the lower die 1. The outer wall frame 4 is composed of a pair of opposed brackets 4a, 4a.
b, which is a split type attached to
a is configured to be able to move up and down by the cylinder 5, and the bracket 4b is constantly applied with a downward pulling force by the spring body 6, and is engaged with the bracket 4a at both ends to allow the bracket 4a to move up and down. It is configured to move up and down freely following the movement. It is needless to say that all the brackets can be moved up and down by the cylinder.

Next, a process of vacuum forming a door trim with a skin material using such a mold will be described with reference to FIG. First, as shown in FIG.
And clamp the outer edge of the skin material 10 to the outer wall frame 4.
Is set down on the lower mold 1 and a substrate 11 for door trim is set on the lower mold 1. Then, as shown in FIG. 1 (B), the cylinder 2 is actuated so that only the outer wall frame 4 is placed thereon. If the edge is raised to a position slightly higher than the highest position of the base material 11 and the skin material 10 is heated in this state according to a conventional method, the skin material 10 is softened and becomes the center as shown in FIG. At this time, since the outer wall frame 4 is raised on the outer periphery of the lower mold 1, even if the central portion of the skin material 10 hangs down, the drawdown portion is formed by the base material 11. Never touch.

Next, as shown in FIG. 1 (D), the outer wall frame 4 is raised until the upper edge thereof comes into contact with the skin material 10 to be surrounded by the lower mold 1, the outer wall frame 4 and the skin material 10. If a closed chamber is formed and the lower mold 1 is raised in this state, the internal pressure of the closed chamber in the outer wall frame 4 is increased, and the drawdown portion at the center of the skin material 10 formed by the softening process is indicated by an arrow. As before
Since it is completely prevented from being pushed up by the internal pressure described above and coming into contact with the substrate 11, the lower mold 1 is then disposed on the surface of the lower mold 1 according to a conventional method as shown in FIG. By applying a suction pressure through the formed pores to evacuate the skin material 10 and lowering only the outer wall frame 4 to a position below the design forming surface of the lower mold 1, the skin material 10 becomes
It is adhered and integrated exactly along the surface of 1. After the skin material is stuck and integrated on the surface of the base material in this manner, the finished product is taken out from the lower mold 1 by a conventional method, and the same procedure may be repeated thereafter.

[0010]

As is clear from the above description, an outer wall frame is provided outside the lower die along the peripheral surface of the lower die and is raised until it comes into contact with the skin material. The closed room surrounded by the lower mold, outer wall frame and skin material
The internal pressure of the skin material is increased, and the draw-down portion at the center of the skin material formed by the softening treatment is pushed up by the increased internal pressure to prevent the contact with the base material, and then the evacuation is performed while lowering the outer wall frame. By performing the above, the skin material can be accurately adhered and integrated without causing irregularities on the surface of the base material even in a complicated design shape. In addition, since it is only necessary to provide the conventional apparatus with an outer wall frame that can move up and down, the apparatus is excellent in productivity and can achieve significant cost reduction. In addition, according to the present invention, there is an advantage that processing quality is easily ensured because it is independent of variations in a heating temperature, a molding time, and the like, and a selection range of an adhesive is expanded because occurrence of irregularities is reliably prevented. It also has the advantage of being able to. Therefore, the present invention has a great contribution to the development of industry as a method of manufacturing an interior material for automobiles in which a skin material is adhered to a base material that has eliminated the conventional problems.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a molding step according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a lower mold used in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 lower mold 4 outer wall frame 10 skin material 11 base material

Claims (1)

(57) [Claims] 1. A softened skin material placed on a surface of a base material set in a lower mold having a vacuuming function with its peripheral edge clamped at a position above the lower mold and vacuum-treated. In the method for manufacturing an interior material for an automobile, which is attached and integrated, an outer wall frame which rises and falls along the peripheral surface of the lower die is provided outside the lower die, and this is raised until it comes into contact with the skin material. Raise the lower mold with the lower mold, outer wall frame and skin material
Increase the internal pressure of the enclosed chamber surrounded by and draw down the central part of the skin material formed by softening with this internal pressure
A method of manufacturing an interior material for automobiles, wherein a skin material is adhered to a base material, wherein the material is pushed up to prevent contact with the base material, and then vacuum is performed while lowering the outer wall frame.