JPS6023131Y2 - Heat insulation wall forming equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an insulating wall forming apparatus with an improved gas venting structure.

Conventionally, when forming a heat insulating wall such as a refrigerator door, the first
As shown in the figure, after inserting and arranging the door outer panel 3 into the lower mold 1 and upper mold 2, the stock solution of the foamable insulation material is injected from the injection port 4 of the upper mold 2, and then formed into the upper mold 2. The stock solution is foamed and solidified while degassing through the degassing holes 5.

By the way, after the above-mentioned foaming of the stock solution, the heat insulating material is pushed out of the mold through the gas vent hole 5 as shown in the figure, and the lower mold 1 and the upper mold 2 are removed to form the next heat insulating wall. When used for this purpose, it is necessary to remove the solidified heat insulating material that has clogged the gas vent hole 5.

According to the above configuration, it is necessary to remove the solidified heat insulating material by inserting a tool or the like into the gas vent hole 5, and the removal work is troublesome and time-consuming, and the heat insulation is not good in general. It was not possible to expect an improvement in wall productivity.

Therefore, an object of the present invention is to form a notch recess at the peripheral edge of the upper mold so as to open a part of the opening of the outer plate, and to connect the end of the inward flange formed in the opening to the notch recess. By configuring the space surrounded by the space as a gas vent hole, the foamed heat insulating material stuck to the space can be easily removed, and the productivity of the heat insulating wall can be improved. The present invention provides a heat insulating wall forming device.

An embodiment in which the present invention is applied to a refrigerator door will be described below with reference to FIGS. 2 to 4.

First, in FIG. 2 showing the refrigerator door, numeral 11 is a heat insulating wall manufactured by the heat insulating wall forming apparatus of the present invention, which will become clear from the description later. Fill with material 13 and empty.

An inward flange 12b is formed at the opening of the outer plate 12.

Reference numeral 14 denotes an inner plate which is attached to the flange 12b of the outer plate 12 by screws so as to close the opening, and forms a protrusion 15 for forming a pocket.

16 is a magnetic gasket attached around the inner plate 4.

Now, the heat insulating wall forming apparatus of the present invention will be explained with reference to FIGS. 3 and 4 together with the manufacturing procedure of the heat insulating wall 11.

That is, 17 is a lower mold composed of a rectangular side frame 18 and a bottom plate 19, into which the outer plate 12 is inserted.

Reference numeral 2o denotes an upper mold having a rectangular flat plate shape, and has an injection port 21 formed in the center thereof, and cutout recesses 22 having a predetermined depth dimension in the peripheral edge, for example, in a part of each corner.

Then, the upper mold 20 is placed on the lower mold 17 so as to close the opening of the outer plate 12.

In this state, the notch recess 22 opens a part of the opening of the outer plate 12, and a space 23 is formed between the notch recess 22 and the end 12a of the flange 12b of the outer plate 12. (See Figure 3).

Thereafter, the stock solution of the foamable heat insulating material 13 is injected into the mold through the injection port 21 and foamed and solidified, thereby forming the heat insulating wall 11 (see FIG. 4).

At the time of this foaming, gas is vented from the cavity 23, and as the foamable heat insulating material 13 finally foams and fills the outer panel 12, a part of it leaks out of the mold from the cavity 23. do.

Therefore, when the lower mold 17 and the upper mold 20 are removed and used for manufacturing the next heat insulating wall, the foamed heat insulating material 13 fixed in the cavity 23 is removed from the notch recess 22 and the flange 12 of the outer panel 12.
However, unlike a conventional gas vent hole, a part of the peripheral edge of the cutout recess 22 is open outward, so that the foam heat insulation that remains fixed may remain on the end 12a of the The material 13 can be easily and quickly removed using a tool or the like, and the foamed heat insulating material 13 remaining stuck to the end 12a of the flange 12b of the outer panel 12 can also be easily removed by scraping it off along the flange 12b.

Therefore, the productivity in mass producing heat insulating walls can be greatly improved.

Since the outer plate 12 constituting the outer shell of the heat insulating wall 11 is used to form the cavity 23 serving as the gas vent hole, although the gas vent hole (the cavity 23) is formed by two members, No new parts are required, so the number of parts and manufacturing costs can be reduced.

In the above embodiment, the cutout recesses were formed at a part of each corner of the upper mold 20, but the position where the cutout recesses are formed is not limited to a part of the corner. It is something that can be related.

Further, in the above embodiment, the present invention is applied to a refrigerator door, but the present invention is not limited to this (it goes without saying that the present invention can be implemented with various modifications without departing from the gist.

As is clear from the above description, the present invention makes it possible to easily and quickly remove the foam insulation material stuck to the void space for degassing, and greatly improves overall productivity. It is possible to provide a heat insulating wall forming apparatus that can reduce the number of parts and reduce manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 shows a conventional heat insulating wall forming apparatus, and FIGS. 2 to 4 show an embodiment in which the present invention is applied to a refrigerator door.
FIG. 2 is a longitudinal sectional view of the refrigerator door, FIG. 3 is a perspective view showing essential parts of the heat insulating wall forming apparatus, and FIG. 4 is a longitudinal sectional view showing the heat insulating wall forming apparatus. In the drawing, 11 is a heat insulating wall, 12 is an outer plate, 13 is a foam insulation material, 14 is an inner plate, 17 is a lower mold, 20 is an upper mold, 21 is an injection port, 22 is a notch recess, and 23 is a cavity. It is.

Claims (1)

[Scope of utility model registration request] A lower mold that houses a box-shaped outer panel having an opening and an inward flange formed in the opening, and a lower mold that is placed in the lower mold so as to close the opening of the outer panel and foamed at a predetermined portion. and an upper mold having a notched recess at the periphery thereof, and a gas venting hole in a space surrounded by the end of the flange of the outer plate and the notched recess. A heat insulating wall forming device characterized by: