JPS59118424A - Forming method of surfacing material for vehicle - Google Patents

Abstract

PURPOSE:To obtain the titled surfacing material uniform in thickness, by a method wherein a resin sheet is previously stretched at a part not to be deep drawn, and is slackened at a part to be deep drawn. CONSTITUTION:A thermoplastic resin sheet 13' clamped by clamping means 12 provided at an upper end part of a vacuum forming mold 11 is heated, the part of the sheet 13' is attracted by sucking parts 24 of a pair of assist plugs 21 with a spacing of l1 therebetween, and the plugs 21 are moved respectively leftward and rightward until the spacing becomes l2 to stretch the part of the sheet 13' located therebetween, while the parts of the sheet 13' located between the plugs 21 and the clamping means 12 are slackened. Then, the plugs 21 are lowered to positions corresponding to deep drawing parts 17 at side parts of a mold 11, thereby primarily forming the sheet 13', thereafter the sheet 13' is released from the sucking parts 24, then a vacuum pump 16 is operated to vacuum-form the sheet 13' into a shape conforming to a molding surface 11a of the mold 11, thereby obtaining the surfacing material 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a vehicle upholstery material, and more specifically, the upholstery material is vacuum formed, a stock solution of foamed synthetic resin is injected into the inside of the upholstery material, and foamed. The present invention relates to a method of forming a vehicle upholstery material, such as when manufacturing an integrally molded sheet by forming a padding material integral with the upholstery material.

Figure 1 A and B are conventional methods for forming vehicle upholstery materials.
As shown in FIG. 2, a vacuum forming mold 1 is known. The upper end of this vacuum forming mold 1 is made of vinyl chloride sheet, ABS
A thermoplastic resin sheet 3' such as a resin sheet is clamped by the clamping means 2, and this thermoplastic resin sheet 3' is heated by the heating means 4 such as an infrared heater to soften it, and then the vacuum hole of the vacuum mold 1 is clamped. A vacuum pump 6 connected in communication with the mold 5 is operated to adsorb the thermoplastic resin sheet 3' onto the molding surface 1a of the vacuum mold 1, thereby molding the covering material 3.

However, in the case of vehicle upholstery material 3, deep-drawn seams 7 are often formed, and the thickness of the deep-drawn seams 7 of this upholstery material 3 becomes extremely thin, leading to the risk of breakage during molding and the possibility of damage during molding. It had the disadvantage that it could not maintain its strength afterward, and the wall thickness was uneven, causing deformation such as twisting.

As shown in Fig. 2, it has been proposed that a thermoplastic resin sheet 3' is formed into a facing material 3 using a vacuum forming mold 1 and an anchor plug 8;
The thermoplastic resin sheet 3' is pushed in by the vertical movement of the mold 1, and then the vacuum pump 6 of the vacuum mold 1 is activated.
Although this method works effectively for forming the mounting plate 3 in which the deep-drawn portion 7 exists, it cannot sufficiently solve the drawback that the deep-drawn portion 7 of the vacuum-formed mounting material 3 becomes thin.

The purpose of the present invention is to be able to obtain a facing material with a uniform wall thickness without the risk of thinning the wall thickness of the deep drawn part of the facing material, and to avoid deterioration of rigidity even when using a relatively thin thermoplastic resin. The purpose of the present invention is to provide a method for molding a vehicle upholstery material that is economical and free from the risk of damage, and will be described in detail below with reference to the drawings.

FIGS. 3 to 6 each show an outline of an embodiment of the method for forming a vehicle cover material according to the present invention. Although this will be explained as a molding method, it is not limited to this method.
In addition to being molded from a single thermoplastic resin sheet 13' such as a resin notebook, the thermoplastic resin notebook 13' may be bonded to a fabric such as raised tricot.

The vacuum forming mold 11 has a forming surface 11a corresponding to the outer peripheral surface of the sheet cushion 7, and vacuum holes 15 consisting of a plurality of small holes are formed in the forming surface 11a. This vacuum hole 1
5 is connected to a vacuum pump 16 via a vacuum pipe 18.

A clamping means 12 is provided at the upper end of the twisted vacuum forming mold 11, and the clamping means 12 is configured to clamp the edge of the thermoplastic resin sheet 1 to be formed into the covering material 13. There is.

The thermoplastic resin sheet (13') clamped by the clamping means 12 is configured to be heated by a heating means 4 such as an infrared heater similar to that shown in FIG. 1A.

Above the vacuum forming mold 11, assist plugs 21 that are movable vertically and horizontally are provided, and in this embodiment, a pair of assist plugs 21 are provided corresponding to the deep drawing sound 517 on both sides of the facing phase 13. However, the number may be one, or even three or more.

FIG. 7 schematically shows the force of an embodiment of the assist plug 21 used when carrying out the method of the present invention. The opening 22 force is formed and this opening 2
A net 23 made of steel wire or the like is fixed to the suction part 2.
4 is formed.

A suction device (not shown) is provided in communication with the hollow portion of the unslung plug 21, and the thermoplastic resin sheet 13 is actuated by bringing the suction portion 24 into contact with the thermoplastic resin sheet 1-13'. It can be adsorbed to '. A detailed explanation of a specific structure for attaching the assist plug 21 so as to be movable in the vertical and horizontal directions will be omitted.

Next, the method of the present invention will be explained in detail with reference to FIGS. 3 to 6.

The thermoplastic resin sheet 13' is clamped by the clamping means 2, and the thermoplastic resin sheet 13' is heated by the heating means 4.
After softening, as shown in FIG. 3, the suction portions 24 of the pair of assist plugs 21 are brought into contact with the thermoplastic resin sheet 13', and the suction device is activated to cause the suction portions 24 to absorb the thermoplastic resin sheet 13'. absorb some of it. The pair of assist plugs 21 are arranged approximately at the center with an interval t1 between them.

This interval t1 is appropriately set according to the position where the deep-drawn portion 17 of the covering material 13 is formed, the size and depth of the deep-drawn portion 17, etc. Next, as shown in FIG. As shown in FIG. 4, the pair of assist plugs 21 are moved in the left and right direction, and the pair of assist plugs 21 are spaced apart by l! , move it to the position where it becomes 2. Since the heat-softened thermoplastic resin /-1.13' is adsorbed in the suction portions 24 of the pair of assist plugs 21, the length tl between the assist plugs 21 is thermoplastic resin sheet 13'
will be uniformly stretched to length A2. On the contrary, the length of the assist plug 21 and the clamping means 12 will slacken by the amount that the assist plug 21 moves.

Next (as shown in FIG. 5, the pair of assist plugs 21 are
lower it. This assist plug 21 is lowered to a position corresponding to the deep-drawn part 17 on the side of the facing material 1; 3, or to a position close to the deep-drawn part 17. be done. In addition, when the assist plug 21 stops descending, the operation of the suction device is stopped, and the suction unit 24
Then, the thermoplastic resin sheet 13' is released.

Next, as shown in FIG. 6, the vacuum pump 16 of the vacuum mold 11 is operated to remove the molding surface J1 of the vacuum mold 11. a
A facing material 13 having a shape along the following is molded from the primary molded heat b] plastic resin sheet 1-] 3'. The assist plug 21 may be moved in a direction including horizontal movement, and may be moved diagonally from the state shown in FIG. 3 to the state shown in FIG. 5.

After molding the facing material 13, a stock solution of foamed synthetic resin is injected into the inside of the facing material 13 and foam molding is performed, thereby making it possible to obtain an integrally molded sheet that is an integrally molded product of the padding material and the facing material.

The above is an outline of one embodiment of the method for molding a vehicle upholstery material according to the present invention. On the other hand, by creating slack in the thermoplastic resin sheet on the side where the deep-drawn part is formed, the deep-drawn part becomes thinner during primary forming, and the forming surface of the vacuum forming mold becomes thinner due to the primary forming. Since the thermoplastic resin sheet is stretched into a shape that roughly approximates the shape of It is possible to form the facing material uniformly, and it is possible to mold the facing material using a relatively thin thermoplastic resin sheet, resulting in a high quality and economical facing without the risk of deformation or twisting. It is possible to obtain a method for molding a vehicle upholstery material by which a material can be obtained.

In the above-mentioned embodiment, a pair of anost plugs 21 are used, but as schematically shown in FIG. Using this method, a facing material 13 with uniform thickness can be formed. That is, the anost plug 21 is
It is adsorbed to the thermoplastic resin sheet 13' at the position , and in this state, it is moved by positioning P2 to give slack to the thermoplastic resin sheet 13' on the side where the deep drawing part 17 is formed, and from this state By lowering the anost plug 21 and primary forming the thermoplastic resin sheet 413', and then vacuum forming it using the vacuum forming mold 11, the same high quality facing material 1 as described above is obtained.
You can get 3. In addition, there are multiple unsworn blogs 21
It will be obvious that when using the assist plugs 21, the amount of horizontal movement of the plurality of assist plugs 21 can be changed.

[Brief explanation of the drawing]

Figures 1A and B are cross-sectional explanatory diagrams showing the forming steps of a conventional vacuum forming method for a facing material, respectively; Figure 2 is a cross-sectional explanatory diagram showing a conventional molding method for a facing material using an unslung brag; and Figures 3 to 3. Fig. 6 is an explanatory cross-sectional view showing the omission of steps in one embodiment of the method for molding a vehicle upholstery material according to the present invention, Fig. 7 is a bottom perspective view of an anost plug, and Fig. 8 is a different method of the present invention. It is a cross-sectional explanatory view showing an example. In the figure, 1]... Vacuum forming mold, 12... Clamping means,
13'...Thermoplastic resin sheet, 13. Surface material, 15
...Vacuum hole, 16 Vacuum pump, 17...Deep drawing part,
2 door assist plug, 24...suction part. Figure 1 A Figure 2 Figure 4 Figure 5

Claims (2)

[Claims] (1) It is equipped with a vacuum forming mold and an assist plug that is movable vertically and horizontally and has a suction part formed on the bottom surface, and the edge of the thermoplastic resin sheet forming the covering material is attached to the upper end of the vacuum forming mold. Clamp the sheet, move the assist plug in a direction including horizontal movement with a part of the sheet attracted to the suction part of the assist plug disposed above the sheet, and remove the stretched part of the sheet. and a part that is less stretched than the stretched part, and then a vacuum forming mold is operated to vacuum form the sheet to form the covering material. (2) The thermoplastic resin sheet is adsorbed by a plurality of assist plugs, and some or all of the plurality of assist plugs are moved in a direction including horizontal movement. A method for forming vehicle upholstery materials.