JPS5933141A - Vacuum molding device for interior finish material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present Akanemei relates to a vacuum forming device for inner lining materials, and to explain in more detail, it is arranged above a female vacuum forming mold and a cold air forming mold, and is used to form inner lining materials into vacuum forming molds. The present invention relates to a vacuum forming apparatus for interior materials, which is equipped with a plug that is pushed into the interior. .

Conventional interior materials for vehicles, etc. 1. For example, interior materials such as seat back garnishes and door interior materials are often vacuum-formed using a box-shaped female vacuum mold to obtain interior materials with a U-shaped cross section such as back garnishes. When obtaining a deep-drawn shape, as in the case of deep drawing, the thickness of the molded product tends to be uneven, which tends to cause deformation such as twisting in the molded product, and the corners on the bottom side are particularly thin. This has the disadvantage that thin interior material can be used.Furthermore, when a box-shaped vacuum forming mold is used when deep drawing is required only on both sides, such as for a back garnish, it is difficult to use thin interior material. In order to make the inner material close to the outer periphery of the vacuum forming mold, an unnecessarily large amount of interior material must be used, which is extremely uneconomical. .
□ The object of the present invention is to extremely easily obtain a deep-drawn shape with relatively uniform wall thickness, without the risk of the corner portions of the molded product being particularly thin, and to form a relatively thin interior material. Even if you use the original fabric, it is still strong: there is no risk of deterioration in properties, and you can significantly reduce the amount of original fabric used for interior materials.
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FIGS. 1 to 3 show diagrams for interior materials according to the present invention.

A schematic example of an embodiment of the vacuum forming apparatus is shown below.
It consists of a facing material 3 made of a vinyl chloride sheet or cloth, and a merchandising material 4 laminated on the back side of the facing material 3, and is formed into a relatively deep drawing shape. The fourth base may be a heat-formable member, for example, felt added with thermoplastic synthetic keratin. .

The vacuum forming mold 5 of the vacuum forming apparatus 1 is formed into a female mold, and a large number of vacuum holes 7 are formed in this molding surface 6.
A conduit 8 is connected to the conduit 8, and a solenoid valve 9 and a vacuum pump 1o are connected to the conduit 8. Incidentally, the vacuum forming mold 5 is fixed to a mold table 11.

As schematically shown in FIG. 2, the vacuum forming mold 5 has an open part 12 with one side cut out.
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- A sword, in this example a sheet as the interior material 2;
It has a shape for forming a back garnish. , That is, this vacuum forming equipment member has a protrusion 6. having an i-shaped cross section. A is formed, and recesses d and b are formed at the □-side end. The protrusion 6a of the medium heat part corresponds to the recess 34 at the center of the back side of the back garnish 32 as a molded product, which will be described later, and the push part 6b at the - side end corresponds to the protrusion 35 at the upper end of the back garnish 32. It is formed to correspond.

A plug 21 is disposed on the two sides of the vacuum forming mold 5 so as to be able to move downward; the plugs 21 on both sides are attached to the bottom of the plug table and are moved up and down by sudden pressure or hydraulic pressure. . This plug 21 has a frame member 23 that is in close contact with the outer peripheral edge including the open part 12 of the vacuum mold 5, and a molding member 2 that has a molding surface 25 for primary molding that is fixed inside the frame member 23.
It is composed of 4. In this embodiment, the molding surface 25 of the molding member 24 is a central protrusion 6 of the molding surface 6 of the vacuum mold 5.
Although a pair of protrusions 25a are shown that are in contact with each other on both sides of the interior material 2, the present invention is not limited to this. Any shape can be used as long as it can be primarily formed to correspond to a difficult part or a part for which a clear shape is desired. Further, on both sides of the frame member 23, shielding parts 26 are formed to seal the open part 12 of the vacuum forming mold 5.

The above is the configuration of an embodiment of the vacuum forming apparatus for interior materials according to the present invention. The original fabric 2' is pushed into the vacuum mold 5 using the plug 21 under predetermined temperature conditions. When pushing the original fabric 2' with this plug 21, the original fabric 2'
Both ends of the web 2' are not clamped, and the web 2' is kept relatively unstretched. The original fabric 2' is primarily formed by the forming surface 25 of the forming member 24 of the plug 21 and the forming surface 6 of the vacuum forming mold 5. During this next forming, the outer periphery of the original fabric 2' is brought into close contact with the outer periphery including the open part 12 of the vacuum forming mold 5 by the plug 210 frame member 23,
2 is hermetically sealed by a shielding part 26. Through this subsequent forming, the original fabric 2' is given a shape that approximates the both sides 33 and central recess 34 of the back garnish 32 as the interior paulownia 2 shown in Fig. 4, without any large elongation. .
' If the vacuum pump 10 of the vacuum forming apparatus 1 is operated in this state, the original fabric 2' that is closely contacted with the outer periphery of the vacuum forming mold 5
is formed into a back garnish 32 as the interior material 2.

□According to the present invention, a deep drawing part can be obtained very easily without becoming thin due to thick surface elongation, and the entire wall thickness is uniform and the corner parts do not become particularly thin, making it suitable for the original interior material. Compared to conventional products, it can be formed using thinner material, and due to the presence of the open part □ in the vacuum forming mold, there is no need to perform vacuum forming on unnecessary parts. In addition, the plug frame member along the open part can bring the outer periphery of the raw fabric of the interior material into close contact with each other, so that the amount of raw fabric used for the interior material can be significantly reduced. Vacuum forming equipment can be obtained. □
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[Brief explanation of drawings]

1 to 3 schematically show an embodiment of a vacuum forming apparatus for interior materials according to the present invention, and FIG. 1 is a partially sectional explanatory view of the vacuum forming apparatus, and FIG. 3 is a perspective view of the molding die and the plug, FIG. 3 is a perspective view of the molding surface side of the plug, and FIG. 4 is a perspective view of a back garnish as an example of a molded interior material. In the figure, 1... vacuum forming equipment, 2... interior material, 2'...
Original fabric for interior material, 5... Vacuum forming mold, 7... Vacuum hole,
10... Vacuum pump, 12... Opening part, 21...
Plug, 23... Frame member, 24... Molding member, 25
...Molding surface of molded member, 32...Back garnish as interior material. 7- Figure 1 Figure 4 Figure 3 Figure 2 Figure 3 1. ,. □ 1 ・1■

Claims (1)

[Claims] It includes a female vacuum forming mold with an opening formed on one side, and a vertically movable plug disposed above the vacuum forming mold, the plug including the opening of the vacuum forming mold. A frame member that is in close contact with the outer periphery of the frame member and a molded member that has a molded surface fixed to the inside of the frame member, and the original material of the interior material inserted between the vacuum molding mold and the plug is formed by the plug. Vacuum forming indoors (pushing, so that primary forming can be performed on the molding surface of the plug, and the frame member brings the outer periphery of the interior material material into close contact with the outer periphery of the vacuum forming mold to form the interior material. A center/middle forming device for interior materials, which is characterized by the following: □ ・