JPH01209111A - Method for molding chip molded product and said molded product - Google Patents

Abstract

PURPOSE:To obtain a chip molded product having a desired accurate shape, by integrally applying press molding to a chip material in such a state that the upper end surface thereof is covered when difference of height is formed to the upper end surface of a molded product. CONSTITUTION:For example, a mold 11 is equipped with a lower mold 12 and an upper mold 13 each of which has an inverted U-shaped molding surface and nets 16, 17 are arranged to the lower and upper end surfaces of a chip material 15. The nets 16, 17 have the mesh size corresponding to the size of the chip material 15 and are formed of a material having extensibility. When the mold 11 is a heating mold, the chip material 15 held between the nets 16, 17 are subjected to press molding by clamping the lower and upper molds 12, 13 to obtain a chip molded product having a desired shape. When a press mold is used at ambient temp, the chip material 15 is inserted between the lower and upper molds 12, 13 in a heated state to be subjected to press molding. The lower end 13a of the upper mold 13 is brought into contact with the net 15 when the upper mold 13 is allowed to fall but the chip material 15 is not directly brought into contact with said lower end 13a and, therefore, the whole of the chip material 15 is accurately subjected to press molding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for molding a chip molded product and the molded product. More specifically, the present invention relates to a method for molding a chip molded product and the molded product. , relates to a method for molding a chip molded product which is press-molded by clamping the lower mold and the upper mold, and the molded product.

[Conventional technology]

Conventionally, chip molded products have been used for interior materials such as automobiles, and these chip molded products are made by mixing an appropriate binder with chip materials such as crushed pieces of urethane slabs, urethane bread crumbs, and pieces of felt. Press molding is performed by inserting these into a lower mold and clamping the upper mold.

[Problem to be solved by the invention]

However, when a height difference is formed in the upper end surface of a chip molded product, for example, in the case of a molded product 1 formed with an inverted U-shaped cross section as shown in FIG. In the molded product 1 in which the portion 1b is formed low, when the upper mold 3 descends toward the lower mold 2 side, the tip 3a of the upper mold 3 contacts the chip material 5 on both sides 1b, and the chip material 5 on both sides This had the disadvantage that the shape of both sides could not be accurately formed by moving it downward.

An object of the present invention is to prevent the chip material existing on both sides or at a high position from being partially extreme during press molding by clamping the upper mold when a height difference is formed on the upper end surface of the chip molded product. An object of the present invention is to provide a method for molding a chip molded product that is economical and can be formed into a desired and accurate shape without the risk of movement.

Another object of the present invention is to provide a chip molded product that has a height difference on its upper end surface and has excellent shape retention.

[Means to solve the problem]

The present invention was made in view of the above-mentioned problems, and is a chip molded product that is press-formed by inserting a chip material between a lower mold and an upper mold, and clamping the lower mold and upper mold. In the molding method, when a height difference is formed on the upper end surface of the molded product, the upper end surface of the chip material is covered with a net and press-molded integrally.

Furthermore, the present invention is characterized in that the chip material is molded by the method described above, the upper end surface and/or the lower end surface of the chip material is covered with a mesh, and the chip material is press-molded integrally with the mesh.

[Effect]

According to the method of the present invention, when a height difference is formed on the upper end surface of the chip material, since the upper end of the chip material is covered with a net, the chip material can be removed during press molding by clamping the lower mold and the upper mold. There is no risk that parts of the chip may move apart, and it is possible to obtain a chip-molded product having the desired exact shape.

In addition, since the net is integrally press-molded on the upper and/or lower end surfaces of the chip material, it is possible to obtain a chip molded product in which a height difference is formed on the upper end surface of the chip material, and the shape retention due to the net is improved. Excellent chip molded products can be obtained.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for molding a chip molded product and the molded product according to the present invention will be described in detail below with reference to the drawings.

1 and 2 show an example of the method for molding a chip molded product according to the present invention, and FIG. 3 shows an example of a chip molded product molded by the method. It is shown.

For example, the mold 11 includes a lower mold 12 and an upper mold 13, each having an inverted U-shaped molding surface. It may also be a mold.

The chip material 15 is made of crushed pieces of urethane slabs, urethane bread crumbs, felt pieces, etc., and is formed by spraying or mixing a suitable binder onto these pieces.

Nets 16 and 17 are provided on the lower and upper end surfaces of this chip material 15. The nets 16 and 17 have meshes corresponding to the size of the chip material 15, and are made of a stretchable material such as PP fiber or woven fabric. When the size of the chip material 15 is small, the mesh is also formed sufficiently small to prevent the chip material 15 from falling off from the mesh.

When the mold 11 is a heating mold, the chip material 15 sandwiched between the nets 16 and 17 is press-molded by clamping the lower mold 12 and the upper mold 13 to form the chip into the desired shape. Obtain item 21.

If a press molding die at room temperature is used, the heated chip material 15 is inserted between the lower die 12 and the upper die 13 and press-molded.

When lowering the upper mold 13, the lower end 13a of the upper mold 13 contacts the net 16 on the upper end surface of the chip material 15, but does not directly contact the chip material 15, so that the chip material 15 partially moves downward. There is no movement, and the entire chip material 15 is accurately press-molded into the desired shape.

Note that the shapes of the lower mold 12 and the upper mold 13 can be reversed, and various shapes can be formed corresponding to the molded product 21 having a difference in height above the ground. Also, molded product 2
The method of the present invention can be applied even if the lower end surface is flat, as long as there is a height difference in at least the upper end surface of 1.

The chip molded product 21 molded by the above method has a height difference on the upper end surface, as shown in FIG.
In addition, the chip molded product 21 has meshes 16 and 17 integrally press-molded on the upper and lower end surfaces of the chip material 15 and has excellent shape retention.

4 and 5 show different embodiments of the method of the present invention. As shown in FIG.
is inserted, the upper end surface of this chip material 15 is covered with a net 18, and in this state, as shown in FIG. 5, the upper die 13 is clamped and press-molded, thereby forming a chip as shown in FIG. 6. A chip molded product 22 is obtained in which M418 is integrally press-molded on the upper end surface of the material 15.

During press molding, the lower end 13a of the upper mold 13 comes into contact with the net 18 on the upper end surface of the chip material 15, so that the outside of the side part of the chip material 15 does not partially move downward, and the entire chip material 15 is formed as described above. As in the embodiment, the chip molded product can be accurately press-molded into a desired shape, and since the net 17 on the lower end surface of the embodiment described above can be omitted, it is possible to obtain a chip molded product with excellent economical efficiency.

Instead of the surface lines 16, 17 and 18, a sheet material having elasticity may be used. Furthermore, when forming a chip molded product 21, 22 having a substantially uniform thickness, the partition portion or the sewn portion should be formed into a net 16, 17 or 18 so that the chip material 15 does not move in the left-right direction. You can also do it.

〔Effect of the invention〕

The above is the method for molding a chip molded product according to the present invention, and the method and structure of one embodiment of the molded product. According to this method, a height difference is formed at least on the upper end surface of the chip molded product. In the case where the chip material is press-formed with at least the upper end surface covered with a mesh,
There is no risk that the outside or inside side of the chip material may be partially moved downward, and it is possible to obtain a chip molded product that is easily shaped and accurately press-molded into a desired shape.

In addition, the mesh is integrally press-molded on the upper and/or lower end surfaces of the chip material, and a chip-molded product having a height difference on the upper end surface that is accurately press-molded into the desired shape can be obtained. An excellent chip molded product can be obtained, and when this chip molded product is covered with a covering material, etc., there is no risk of having any effect because the net is embedded in the chip material. You can get it.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional explanatory diagrams showing one embodiment of the method for molding a chip-molded product according to the present invention, and FIG. 3 is a cross-sectional explanatory diagram of a chip-molded product molded by the above-mentioned molding method. 4 and 5 are cross-sectional explanatory diagrams showing different embodiments of the method of the present invention, FIG. 6 is a cross-sectional explanatory diagram of a different chip molded product, and FIG. 7 is a conventional chip mold molded product. FIG. 3 is an explanatory cross-sectional view showing a method for molding a molded product. In the figure, 11... Molding mold, 12... Lower mold, 13...
Upper mold, 15... Chip material, 16, 17. 18... Net, 21° 22... Chip molded product. Patent applicant: Ikeda Bussan Co., Ltd. Figure 4 Figure 5

Claims (2)

[Claims] (1) In a method for forming a chip molded product in which a chip material is inserted between a lower mold and an upper mold, and the lower mold and the upper mold are clamped to be press-molded, the upper end surface of the molded product is A method for forming a chip molded product, characterized in that when a height difference is formed, the upper end surface of the chip material is covered with a net and press-molded integrally. (2) Molding by the method for forming a chip molded product according to claim 1, wherein the upper end surface and/or lower end surface of the chip material is covered with a net during press molding of the chip material, and the chip material is press-molded integrally with the net. molded products.