JPS6277545A - Manufacture of heat insulating layer for use in fluid container - Google Patents

Abstract

PURPOSE:To eliminate a jig for molding and to reduce manpower for forming a heat insulating layer by providing a partition wall on the entire periphery of a side surface directed from an opening part of an outer shell to a tank, and pouring a foaming agent therebetween. CONSTITUTION:When an opening is formed in an outer shell 2, it is formed with cut pieces 2A and 2B which form a wall surface 50 remaining unopened on both sides. Packings 8 are pasted longitudinally to a part of cut pieces 2A and 2B and bent so that the pickings 8 make contact with a tank 1. By this procedure, a wall surface 50 is formed on the peripheral surface of a part of the side surface directed to the tank 1. Then, cut pieces 2C formed in a fan shape are loaded at upper and lower parts of the opening of the outer shell 2 together with packings 9 and 9. Thus, a wall surface 51 is formed at the upper and lower parts of the opening of the outer shell 2. A foaming urethane solution 5' is poured between the outer shell 2 and the tank 1 and foamed. Then, a heat insulating layer is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a heat retaining layer for a liquid container, and more particularly to a method for manufacturing a heat retaining layer for a liquid container in which an opening in the heat retaining layer can be easily formed.

[Conventional technology]

A hot water storage tank will be described below as an example of this type of liquid container.

FIG. 5 is a partially cutaway perspective view of a conventional hot water storage tank as a liquid container. In FIG. 5, a liquid such as hot water can be stored inside a tank 1, and an exterior 2 is provided on the outer periphery of the tank 1 at a constant interval, and the upper end of the exterior 2 An exterior cap 3 is fixed to the. A heating section flange 4 is provided on the bottom side of the tank 1, and a heat insulation layer opening 6 of a foamed urethane heat insulation layer 5 is provided in a certain portion surrounding the flange 4.

Note that the foamed urethane heat insulation layer 5 is attached to the tank 1 and the exterior 2.
- Provided in a space with the exterior body consisting of the exterior cap 3.

A conventional hot water storage tank is configured as described above, with tank 1
The hot water stored inside will be kept warm.

A conventional method for manufacturing a heat retaining layer in such a hot water storage tank will be explained with reference to FIGS. 6 to 9.

FIG. 6 shows a molding jig 7 used in the conventional manufacturing method. It has a frame body formed by standing plates 72A, 72B and 73A, 73B on the drain 71, and the area of the frame body is made slightly smaller than the opening of the exterior 2.

The end face of the plate body 72 is configured to match the curvature of the tank 1.

As shown in FIG. 7, the molding jig 7 having such a structure is first inserted and fixed into the opening of the exterior 2 with the packing 8 interposed therebetween.

When the foaming process is completed, the result will be as shown in FIG.

Furthermore, after the foaming of the foaming urethane liquid is completed.

When the molding jig 7 and packing 8 are removed, the result is as shown in Figure 9. When the molding is completed in this state, a hot water storage tank having the structure shown in FIG. 5 is completed.

[Problem that the invention seeks to solve]

However, according to such a conventional manufacturing method, it is necessary to attach and detach the molding jig 7 each time a heat insulating layer is formed, and furthermore, it is necessary to prepare a molding jig 7 for each different size of the opening. I had to.

Therefore, it takes a lot of man-hours to create the heat retaining layer, and if a large number of molding jigs are prepared, there are problems in that it is expensive and difficult to store.

The present invention has been made in view of the above-mentioned problems, and
The purpose is to provide a method for manufacturing a heat insulating layer for a liquid container, which can produce a heat insulating layer having an opening without using a molding jig.

[Means for solving problems]

The method of manufacturing a heat insulating layer for a liquid container of the present invention, which solves the above problems, has a heat insulating layer opening without a heat insulating layer, and forms a heat insulating layer by injecting and foaming a foaming material between the exterior and the tank. This method of manufacturing a heat insulating layer for a liquid container is characterized in that a partition wall is provided around the opening of the exterior or the entire circumference of the side surface facing the b-tank, and then a foaming material is injected.

[Effect]

The outer sheathing is provided at regular intervals around the outer circumference of the tank. An opening is provided in the exterior that corresponds to the portion where the heat insulating layer opening is formed. A partition wall is provided all around the side facing the tank from the opening of this exterior. After that, a foaming material is injected between the exterior and the tank and foamed. As a result, there is no heat insulating layer at the opening of the heat insulating layer, and a heat insulating layer is formed in the other outer peripheral portions of the tank.

Since the present invention is configured as described above, a molding jig is not required, and the number of steps for forming the heat retaining layer can be reduced.

〔Example〕

Hereinafter, the present invention will be explained based on the drawings.

FIGS. 1 to 4 are explanatory diagrams shown for explaining an embodiment of the method for manufacturing a heat insulating layer for a liquid container according to the present invention.

As shown in FIG. 1 (1), when forming an opening with a height H and a width W in the exterior 2, sections 2A and 2B, which form the wall surface 5o at a length Q, are left on both sides, respectively. The section 2A,
A packing 8 is attached to a part of the tank 1 in the longitudinal direction, and the sections 2A and 2B are bent so that the packing 8 is in contact with the tank 1, as shown in FIG. 1 (II) and (I[I). As a result, a wall surface 50 is formed on a part of the circumferential surface of the side surface facing the tank 1 from the opening of the exterior 2.

On the other hand, the piece 2C that will become the wall surface 51 is formed into the shape shown in FIGS. 2(1) and 2(u). The piece 2C is formed into a fan shape, the inner curvature m is made to match the curvature of the outer periphery of the tank 1, the outer curvature n is made to match the curvature of the inner periphery of the exterior 2, and the outer part is bent to have a cross section. Form into a letter shape.

Next, as shown in FIG. 1 (IV), the piece 2C is
Attach it together with the gaskets 8 and 9 above and below the opening. Also, attach the patch to the necessary areas. As a result, wall surfaces 51 are formed above and below the opening of the exterior 2, and the wall surfaces 50
Since it is formed.

A partition wall 50 is provided around the entire circumference from the opening of the exterior 2 toward the tank 1.
51 will be formed. Also, since the gaskets 8 and 9 are provided in the gaps, there is no leakage.

Furthermore, as shown in FIG. 1(V), the exterior 2 and the tank 1 are
A foaming urethane liquid 5' is injected between the two and foamed.

By doing so, a heat insulating layer is formed as shown in FIG.

FIG. 4 is an explanatory diagram showing another embodiment of the present invention. Fourth
The difference between the embodiment shown in the figure and the previously described embodiment is that a piece 2D having a shape as shown in FIGS. half body 2
D is attached to the opening of the exterior sheath 2, and together with the attachment of the piece 2C, a partition wall 50, 51 is formed around the entire circumference of the side surface facing the tank 1 from the opening of the exterior sheath 2.

In each of the above embodiments, partition walls 50 and 51 are provided around the entire circumference of the side of the opening of the exterior 2 facing the tank to enable injection of the foamed urethane liquid 5', so no jig is required for forming the heat insulating layer. become.

Further, since the work of attaching and removing the jig is not necessary, the number of man-hours can be reduced.

Although the above embodiments have been described as forming a heat insulating layer of a hot water storage tank, it goes without saying that the present invention is applicable not only to hot water storage tanks but also to tanks and containers that require heat insulation.

〔Effect of the invention〕

As described above, according to the present invention, a molding jig is no longer required to create the heat insulating layer opening, and there is no need to attach or detach the jig, thereby reducing the number of man-hours.

[Brief explanation of drawings]

FIGS. 1 (1) to (V) are explanatory diagrams showing embodiments of the present invention,
Figures 2 (1) and (II) are explanatory diagrams of the three members used in the same example, Figure 3 is a perspective view showing the heat insulating layer formed in the same example, and Figure 4 is an explanatory diagram showing the holding example. 5 to 9 are explanatory diagrams shown for explaining conventional examples. 1...Tank, 2...Exterior, 2A, 2B・
... section, 2c... piece body, 8.9... patsukin.

Claims (1)

[Claims] An exterior body is provided around the outer circumference of the tank, a partition wall is provided from the opening of the exterior body to the entire circumference of the side facing the tank, and then a foaming material is injected between the tank and the exterior body and foamed to form a heat retaining layer. 1. A method for manufacturing a heat retaining layer for a liquid container, comprising: forming a heat retaining layer opening portion at the same time as forming a heat retaining layer opening.