JPH02130124A - Manufacturing method of vacuum insulation products - Google Patents

Abstract

PURPOSE:To reduce weight by dispensing with an increase in the thickness of each plate body or the insertion of a supporter and to enhance heat insulating capacity by outwardly expanding the plate body constituting the outer frame of a heat insulating product preliminarily and returning each plate body to a normal shape at the time of vacuum evacuation. CONSTITUTION:A cover body 4 consists of an outer tank material 1, an inner tank material 2 and the end member 3 connecting both materials 1, 2. The cover body 4 is inserted in a frame body 5 filled with the same powder B as a filler A being a powdery heat insulating material and pressure of about 1kgf/ cm<2> is applied to the interior of the heat insulating space 6 in the cover body 4 to expand the cover body 4. At this time, the initial displacement quantity for expansion is made equal to displacement depressed inwardly at the time of vacuum evacuation. Next, the expanded cover body 4 is taken out of the frame body 5 to fill the heat insulating space 6 with the filler A having high pressure resistance and subsequently evacuated under vacuum. Whereupon, the cover body 4 is ready to be pressed inwardly by atmospheric pressing force cut, since the cover body 4 is preliminarily expanded, the cover body 4 becomes a normal shape.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a vacuum insulation product in which a powder insulation material is filled in a vacuum insulation space, and particularly relates to a method for manufacturing a vacuum insulation product in which a powder insulation material is filled in a vacuum insulation space, and particularly for square-shaped low-temperature containers, high-temperature containers, and consumer use. Container (tatoeba dispenser)
The present invention relates to a method for manufacturing vacuum insulation products suitable for manufacturing vacuum insulation products such as stockers) and panel-shaped single-cell insulation products.

2. Description of the Related Art Conventionally, in this type of insulation product, when making a container, for example, as shown in FIGS. 6 and 7, an outer box 11, an inner box 12, and these boxes 11. It is formed from an end plate 13 that connects the I2 comrades to form a heat insulating space 14 inside, and this heat insulating space 14 is filled with a powder filler 15 (or powder molded body, porous solid, etc.) to provide heat insulation. The product was configured. In addition, the above outer box 11. Inner box 12. The end plate 13 and the like are made of a metal material or a chemical product such as dew stick.

Problem to be Solved by the Invention However, in the above structure, when the inside of the heat insulating space 14 is evacuated, as shown in FIG. 8, the walls of the container, that is, the outer box 11 and the inner box 12, are The end plate 13 tends to deform inward, but conventionally, in order to prevent this,
Although attempts were made to increase the thickness of the walls and insert supports and supporting materials into the heat insulating layer, there were problems in that the stacking of products became heavy and the insulation performance deteriorated due to bridges.

Therefore, an object of the present invention is to provide a method for manufacturing a vacuum insulation product that can solve the above problems.

Means for Solving Section vA In order to solve the above problem, the vacuum insulation product of the present invention fills a powder insulation material in the vacuum insulation space formed between the first plate and the second plate. When forming a vacuum insulation product, each of the above-mentioned plates is made into an inflated shape in advance, and then, after the powder insulation space is completely filled in the insulation space, each plate is shaped into its normal shape by the pressure of the atmosphere during exhaust. This is the manufacturing method.

Effect According to the above manufacturing method, when exhausting the adiabatic space,
Each plate is dented by the pressure of the atmosphere and assumes its normal shape.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. In this embodiment, a method for manufacturing a box-shaped one-piece item will be described.

First, as shown in FIG. 4, an outer tank material 1, an inner tank material 2,
The walls of each member 1, 2 and 3 of the cover unit 4, which consists of the end member 3 that connects the outer tank material 1 and the inner tank material 2, are made to bulge outward (- dotted chain line ). At this time, each of the initial displacement desires δ1 to i, which are inflated, are made equal to the displacement amounts δ1' to δ,', which are inwardly depressed when the air is evacuated to a vacuum state.

By the way, as a method for inflating each member 1, 2.3 of the cover unit 4 by one amount.

As shown in FIG. 1, the cover unit 4 is inserted into the frame body 5 filled with the same powder B as the filler material, which is a powder heat insulating material, and then the cover unit 4 is inserted into the heat insulating space 6 inside the cover unit 4. Inflate by applying pressure around IKpf4 (gauge pressure). Of course, at this time, the pressure inside the frame 5 is atmospheric pressure. Next, the second
As shown in the figure, this inflated cover body 4 is attached to a frame body 5.
After taking out the heat insulating space 6 and filling it with a highly pressure-resistant filler A, it is evacuated to a vacuum state. Then, the Elicaba unit 4 tries to be pressed inward by the pressing force of the atmosphere, but since it has been inflated beforehand, as shown in FIG. 3.

It becomes a normal shape (or the caustic state shown in Figure 4).

In this way, the product shape is normally rounded, thin-walled metal materials (or chemical products such as thin-walled plastic) are used, and the above-mentioned filler material is pressure-resistant enough to withstand the pressing force of the atmosphere in a vacuum. A material with high properties is used, such as a fine powder whose main component is inorganic silica.

Here, as an experimental example, all 900H square panel-shaped insulation products were manufactured. As a face material, S with a thickness of 1tIl for both the top and bottom
Thin plate of US 304 and SU with thickness α5u as end member
All thin plates of S304 were used, and the cover was inserted into the same powder as the filler, and a pressure of 1 kg'l, tl (gauge pressure) was applied to the heat insulating space of the cover to inflate it. In this state, the cover was filled with a filler, and then taken out from the spring/I-/gold powder and evacuated. As a result, the spring μ has a smooth surface with a 900
We were able to suppress the amount of deflection to 2U or less relative to the span of the wag.

Incidentally, in the above embodiment, pressure sound was used within the heat insulating space 6 of the cover unit 4 to inflate the cover unit 4, as shown in FIG. 5, for example.

Conversely, the air inside the frame body 5 may be exhausted to make the outside of the cover unit 4, that is, the powder Bfr, in a vacuum state. In this case, of course, the inside of the heat insulating space 6 is at atmospheric pressure.

Effects of the Invention According to the manufacturing method of the present invention described above, since the plates constituting the outer frame of the insulation product are inflated outward in advance, each plate returns to its normal shape during evacuation, and therefore each plate There is no need to increase the wall thickness or insert supports, etc., and it is therefore possible to provide a vacuum insulation product that is lightweight, inexpensive, and has excellent insulation performance.

[Brief explanation of the drawing]

Figures 1 to 3 are sectional views explaining the manufacturing procedure of a vacuum insulation product according to an embodiment of the present invention, Figure 4 is an enlarged sectional view of the main part of the same vacuum insulation product, and Figure 5 is another embodiment. 6 to 8 are cross-sectional views for explaining the conventional example.
The figure is a perspective view of the vacuum insulation product, FIG. 7 is a sectional view of the same, and FIG. 8 is a sectional view illustrating defects during manufacture. l... Outer tank material, 2... Inner tank material, 3... End member, 4
...Cover integrated, 5...Frame body, A...Powder insulation material. Agent Yoshihiro Morimoto No. F---9 [1st Officer F's 2-[111 Tank I Sai 3- Zuishi 1 I 4-f) Bar 1 I Fig. 4 1:1 Fig. 8 Fig. 5 No. 6 Figure 7

Claims (1)

[Claims] 1. When forming a vacuum insulation product in which the vacuum insulation space formed between the first plate and the second plate is filled with a powder insulation material, each of the plates is not inflated in advance, A method for producing a vacuum insulation product, which comprises: filling a heat insulation space with a powder insulation material; and then shaping each plate into a normal shape by pressure from the atmosphere during exhaust.