JPS58181621A - Expansion mold for cushioning pad - Google Patents

Abstract

PURPOSE:To obtain a mold easy to exhaust forming gas in a mold for cushioning pad composed of pad material molded by foamed synthetic resin and a support material by composing a portion on said mold abutting on the support material of punched metal or reticulate material. CONSTITUTION:The foaming mold 1 is composed of a top force 2 and a bottom force 3. A through hole 5 is made on the top force 2 so that the outer peripheral edge portion 4 is left and a punched metal 6 provided with many small holes 6a are fixed on the outer peripheral edge portion 4 so that the through hole 5 is shielded. The support material 12 is mounted on the lower surface side of the punched metal 6 of the top force 2. Then, original liquid 13' of foamed synthetic resin is injected into the bottom force 3 while the top force 2 in closed and the original liquid 13' is expansion-molded. Thereafter, the pad material 13 is molded and fixed in a unitary body with the support material to mold a cushioning pad 11. In this manner, foamed gas can be exhausted easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foam molding mold for a cushion pad, and more specifically, it relates to a pad material molded from a foamed synthetic resin, and a foam mold that is integrally attached to the pad material during molding of the pad material. The present invention relates to a foam mold for a cushion pad made of a support material.

Conventional foam molds have an upper mold and a lower mold, and vent holes are provided in the upper mold to discharge foam gas generated during foam molding and air inside the foam mold to the outside. are being used. When a broken foam mold is used, waste of the foamed synthetic resin called urethane pan is generated from the vent hole, and the foamed synthetic resin is often wasted, and the removal of this urethane pan is complicated. This caused a decrease in work efficiency. Furthermore, if the foaming gas generated during foam molding is not sufficiently discharged from the vent hole, it causes cavities and cracks, making it impossible to obtain a high-quality cushion pad. Also, a vent hole must be drilled in the upper mold.
Since this vent hole cannot be made large enough, the foaming pressure increases, which necessitates the use of a foam mold with a thicker wall.The disadvantage is that the weight increases and the size increases. It had Therefore, when heating a foam mold, the heating volume increases. Furthermore, when molding the band material of the cushion pad, it is difficult to insert and hold the support material that is integrally attached into the foam mold, impeding the speed of the work. This method has the disadvantage that it is not easy to confirm whether or not someone is using the device.

The object of the present invention is to be able to extremely easily discharge foaming gas and air inside the foaming mold from a foaming mold, and in this case, the foamed synthetic resin is not generated outside as a so-called urethane pan, which is extremely economical. It is possible to obtain a cushion pad of excellent quality and extremely high quality.Furthermore, the foam mold can be formed into a thin wall to reduce weight.In addition, it is easy to insert and hold the support material, and the insertion position of the support material can be confirmed from the outside. We provide foam molds for cushion pads.
This will become clear from the detailed description below with reference to the drawings.

FIG. 1 shows an outline of one embodiment of a foam molding mold for a cushion pad according to the present invention. In this embodiment, this foam molding mold 1 is used for molding a cushion band for a seat of a vehicle, etc. shown, but not limited to.

The foam mold l is composed of an upper mold 2 and a lower mold 3.
A through hole 5 is formed with the outer peripheral edge 4 remaining, and a punching metal 6 in which a large number of small holes 6a are bored so as to cover the through hole 5 is fixed to the outer peripheral edge 4 of the upper mold 2. has been done.

In this embodiment, a case will be described in which the punching metal 6 is fixed to the upper die 2, but a net-like material such as a lath net may be similarly used.

Next, with reference to FIG. 2, FIG. 3, and FIG. 4, the usage state of the foam molding mold for a cushion band according to the present invention will be explained.

As shown in FIG. 2, a support member 12 is attached to the lower surface side of the punching metal 6 of the upper mold 2. This support material 1
2 is made of resin felt, coarse wool, slab urethane, etc., and is capable of discharging the foaming gas generated during foam molding of the foamed synthetic resin described later and the air inside the foaming mold 1, and prevents the foamed synthetic resin from leaking. It is formed. Note that this support material 12 is accurately centered by a needle-shaped holding member (not shown) that can be inserted from the outside of the punching metal 6, and the insertion and retention state of the support material 12 can be easily confirmed through the punching metal 6. I can do things.

Next, as shown in FIG. 3, with the upper mold 2 open, the foamed synthetic resin stock solution 13' is poured into the lower mold 3, and the upper mold 2 is molded onto the lower mold 3, and the foamed synthetic resin stock solution 13' is poured into the lower mold 3. 13' is foam-molded (see Figure 4). When foaming the stock solution 13' of the foamed synthetic resin, air, foaming gas, etc. in the foaming mold 1 pass through the support material 12 and the large number of small holes 6a in the punching metal 6 [7] is discharged to the outside,
In addition, the foamed synthetic resin stock solution 13' and the foamed synthetic resin that has undergone foaming are shielded by the support material 12 and are not discharged to the outside.

The pad material 13 is gradually formed as the foaming of the foamed synthetic resin progresses, and the pad material 13 comes into pressure contact with the support material 12 during the foaming process, and the pad material 13 and the support material 12 are fixed together to form a cushion pad. 11 is molded. The support material 12 of the cushion band 11 is slightly impregnated with the foamed synthetic resin stock solution 13' into the support material 12.
Although the support material 12 is slightly hardened, it is better for the support material 12 to be slightly hardened to improve the functions of the spring holder of the notebook cushion 11, etc.

The above is an outline of one embodiment of a foam molding mold for a cushion pad according to the present invention. According to such a configuration, air, foaming gas, etc. in the foam molding mold are transferred from the punching metal of the upper mold to the outside (( In addition to being extremely easy to discharge, the foamed synthetic resin is shielded by the support material and does not form a so-called urethane pan outside, allowing the foamed synthetic resin to be used effectively and eliminate air and foaming gas. Since it is easy to discharge and the foaming pressure does not increase, the foaming mold is formed with a thin wall.
It can be made lighter. In addition, the heating volume of the punched metal part of the upper die of the foam molding mold is small, making it easy to heat the foam molding mold.Furthermore, the inserted state of the support material can be confirmed from the outside through the many small holes in the punching metal. It also has various effects such as being able to reliably and easily attach the support material to the punched metal.

It should be noted that the above description merely shows one embodiment of the present invention;
It will be obvious that various modifications and changes can be made without departing from the spirit of the invention.

[Brief explanation of drawings]

Fig. 1 is an explanatory cross-sectional view schematically showing an embodiment of a foam molding mold for a cushion pad according to the present invention 1; Fig. 2 is an explanatory cross-sectional view showing a state in which a support material is attached to a hollow-shaped punching metal; Fig. 3 4 is a cross-sectional explanatory view of a state in which the stock solution of foamed synthetic resin is injected into the lower mold, and FIG. 4 is a cross-sectional explanatory view of a state in which the band material is molded to form a cushion band. Foaming mold, 2... Upper die, 3... Lower die, 6-... Punching metal, 11... Cushion pad, 12... Support material, 13... Pad material,
13'...Standard solution of foamed synthetic resin. Figure 1

Claims (1)

[Claims] In a foam molding mold for a cushion pad consisting of a pad material foam-molded from a foamed synthetic resin and a support material that is integrally attached during molding of the pad material, punching is performed on the portion of the foam mold that comes into contact with the support material. 7. A foam molding mold for a cushion pad, characterized in that it is formed from metal or a net-like material.