JPS58167128A - Manufacture of cushion body - Google Patents

Abstract

PURPOSE:To obtain the cushion body free from a flash, by arranging an elastomeric packing between the parting faces of the split molds and pouring a foamable stock liquid into a molding space. CONSTITUTION:The split mold is composed of a top force 1a and a bottom force 1b and the molding space for a cushion body is shaped by both. An elastomeric packing material 3 is put between the parting faces of the top force 1a and the bottom force 1b so as to be at the same face as the inner face of both forces 1a, 1b or to protrude somewhat in the molding space. When the foamable stock liquid of a synthetic resin is poured into the mold and foam molding is done, the cushion body 6 made from the foamable stock liquid fills the molding space. After a reaction is finished, the top and bottom forces are parted and the cushion body 6 in which the place corresponding to the parting face of both forces is flat or concave and a flash does not generate is obtained, because the intrusion of a foaming object is prevented by the packing material 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a cushion body used for seats and the like.

In general, the Molle F pear-shaped body used to manufacture cushion bodies for seats, etc. is a split mold made by combining multiple mold components, and when foaming, a part of the foam enters the joint between the molds. The resulting cushion body (foam) had flakes. When such a body was covered with a skin and assembled into a seat, the skin rose up and spoiled the appearance. In addition, the foam part was hard due to the collapse of the bubbles in the foam, and when the part was touched, it felt like a foreign body, which was not desirable. Therefore, there is a drawback that the process requires deburring after foaming.

An object of the present invention is to provide a cushion body which has been devised in view of the above-mentioned drawbacks and which does not produce any flakes.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Figures 1 and 2, (1) is a split mold,
This mold consists of an upper mold (1a) and a lower mold (lb), both of which form a space (2) for molding the cushion body. (3) is an elastic banking material (made of resin), and one end of the backing material is flush with the inner surface (8) of both molds.
- Alternatively, the cushion body may be prevented from becoming burred by being brought into the mating portion of the upper and lower molds so as to protrude somewhat into the molding space.

It goes without saying that the molds can be easily set if the backing material (3) is fixed to the open end edge (4) of either the upper mold or the lower mold.

A foamable stock solution of synthetic resin (
After injecting 5), when foaming is performed, the foaming stock solution fills the cushion body (6) into the molding space as shown in FIG.

After the reaction is completed, the upper and lower molds are separated to obtain a cushion body (6) as shown in FIGS. 4 and 5. During foaming, the backing material (3) at the joint between the upper mold and the lower mold prevents the foam from entering the cushion body (6), resulting in the area becoming flat or concave (7) and causing flaking. There's nothing to do.

As explained above, this invention makes it possible to obtain a cushion body without firmness, so there is no need to carry out any work to remove the foam after foaming. There are advantages such as not having any

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a sectional view showing one embodiment, FIG. 2 is a sectional view showing another embodiment, and FIG. 3 is a sectional view showing one example for manufacturing a cushion body. 4 and 5 are cross-sectional views showing the process, and are cross-sectional views of a cushion body obtained by the present invention. ■... Split mold 2... Molding space 3... Backing material 5... Foaming stock solution 6... Cushion body 7... Concave patent applicant Takaya Kasei Co., Ltd. Figure 1, Figure 2 Figure 8 Figure 4 Figure 5

Claims (3)

[Claims] (1) An elastic backing material is provided at the mating part of the molds of a split mold formed by combining a plurality of mold constituent members, and then within the molding space of the cushion body formed by the split molds. A method for manufacturing a cushion body by completing foaming of the injected foaming stock solution. (2) The method for manufacturing a cushion body according to claim 1, wherein one end of the backing material of the elastic body is flush with the inner surfaces of both molds. (3) The method for manufacturing a cushion body according to claim 1, wherein one end of the backing material of the elastic body projects somewhat into the molding space of the cushion body from the inner surfaces of both molds.