JPS61213585A - Heat-insulating material pack - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat insulating material pack used in refrigerators, frozen prefabricated products, and the like.

Conventional technology The configuration of the conventional example will be explained with reference to FIGS. 7 to 10.

In the figure, 1 is a heat insulating material pack, a breathable inner bag 2 is filled with powder 3 such as perlite, and a non-breathable outer bag 4 made of plastic laminate film, etc.
After being stored in the chamber, the internal pressure is reduced to 0.1 Torr or less and the chamber is sealed.

Reference numeral 5 denotes a peripheral edge of the outer bag 4, the outer bag is bent along the inner bag 2, and the peripheral edge 6 is fixed with tape 6 or the like. here,
7 is a bending line, and 8 is an intersection of the bending lines 7.

9 is a heat insulator used for refrigerators, frozen prefabricated products, etc.
The heat insulating material pack 1 is placed between the inner panel 1o made of synthetic resin or the like and the outer panel 11 made of metal, in contact with the outer panel 11, and a foamed heat insulating material 12 such as urethane is filled between the drawing boards to form the heat insulating material 9. was forming.

Problems to be Solved by the Invention When such a heat insulating material pack 1 is folded at the peripheral edge 6, the outer bag 4 may be sharply sharpened, torn, or subjected to compressive stress at the bending intersection 8 of the peripheral edge 5. As a result, pinholes are generated over time at the bending intersection 8 of the outer bag 4, causing a vacuum break. This was a very big problem. Note that if the peripheral edge portion 5 is not folded, the inner plate 1 will be
There is a problem in that the fluidity of the foamed heat insulating material 9, such as urethane, which is integrally foamed between the outer panel 11 and the outer panel 11 is significantly inhibited, resulting in poor filling, and the establishment of a bending processing method has been a major issue.

The present invention eliminates the problems of the conventional example l),
The purpose is to ensure stable quality without forming pinholes on the outer bag even after bending.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a shape in which the laminate film surface is removed by a notch or the like in the portion where the bending lines of the peripheral edges of adjacent sides overlap. It is.

Operation According to the above configuration, even if adjacent sides are bent, the folding surfaces will not intersect and a folding intersection will not be formed. Therefore, the corners of the outer bag are prevented from becoming acute, thereby eliminating the occurrence of pinholes.

Embodiment Below, the structure of an embodiment of the present invention will be explained with reference to FIGS. 1 to 6. Structures that are the same as those of the prior art will be given the same reference numerals and detailed explanation will be omitted.

In the figure, 13 is a heat insulating material pack, which is formed by inserting an inner bag 2 filled with powder 3 such as perlite into an air-impermeable outer bag 14 made of plastic laminate film or the like.

Reference numeral 15 denotes a cutout in which a hole is pre-drilled on the bending intersection 8 where the bending lines of the peripheral edges 6 of adjacent sides of the outer bag 14 intersect, and the periphery 16 of the cutout 15 is sealed by heat sealing. There is.

To explain the manufacturing process of this heat insulating material pack 13, the inner bag 2 is filled with powder 3 such as perlite, and the opening thereof is sealed by heat sealing. Next, this inner bag 2 is shaped into a flat plate using a press or the like and thoroughly dried. This inner bag 2 is then inserted into the outer bag 14 made of plastic laminate film or the like. At this time, the inner bag 2 is placed so as to be in contact with the inside of the four notches 16 of the outer bag 14.

Next, the outer bag 14 is placed between two presser plates 18 in the vacuum packaging machine 17. Then, the pressure inside the vacuum packaging machine 17 is reduced, and due to the back pressure, the inside of the outer bag 14 is opened at the opening 1 for vacuuming.
When the pressure inside the outer bag 14 is reduced to 0.1 Torr or less, the opening 19 is sealed with a heat sealing machine 2.
The insulation pack 1 is sealed with a heat seal.
4 is formed. Next, the heat insulating material pack 14 is bent such that the peripheral edge 6 is located in the notch 15 at the bending intersection point 8, and is fixed with tape 6.

Next, the operation of the above embodiment will be explained. In the figure, the cutout 15 is formed in advance on the bending intersection 8 where the bending line 7 of the peripheral edge 6 of the adjacent side overlaps, so even if the peripheral edge 5 is folded, the four folds of the outer bag 14 will not overlap at the bending intersection 8. There are no sharp edges. Therefore, the bending intersection point 8 is not formed in the outer bag 14, so pinholes are generated over time, causing a vacuum break. Therefore, the quality of the heat insulating material pack 13 is stabilized. Also, notch 1
5 can be used for positioning the inner bag 2, and a heat insulating material pack 14 of the same shape can be obtained. Therefore, it is possible to automate the bending process, leading to labor savings.

Effects of the Invention The present invention has the above-described configuration, and provides the following effects.

(a) By providing a cutout with the surrounding area heat-milled in advance at the bending intersection where the bending lines of the peripheral edges of adjacent sides intersect, even if the bending process is performed, the sharply pointed bending intersection will not remain on the outer bag. not formed,
As a result of eliminating pinholes caused by stress concentration, there is no vacuum break and the internal vacuum of the insulation pack is maintained, contributing to stable quality.

(b) By using the notch to position the inner bag, insulation packs of the same shape can be obtained and the folding process can be automated.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the insulation pack of the present invention, Fig. 2 is a developed view of the outer bag filled with the inner bag, Fig. 3 is an enlarged view of section A in Fig. 2, and Fig. 4 is a vacuum packaging machine. The cross-sectional opening of the outer bag during vacuuming,
Figure 6 is a front view of the insulation pack folded from its periphery and fixed with tape, etc. Figure 6 is a vertical cross-sectional view of Figure 5, and Figure 7 is a cross-section of a conventional insulation pack. Figure, 8th
The figure shows a developed view of a conventional outer bag filled with an inner bag, Figure 9 is a front view of a conventional insulation pack folded over its periphery and fixed with tape, and Figure 10 is a heat insulator. FIG. 2... Inner bag, 3... Powder, 6...
...Periphery, 7...Bending line, 8...
・Intersection of bending lines, 13...Insulation pack,
14...Outer bag, 15...Notch, 1
e......Around the notch. Name of agent: Patent attorney Toshio Nakao and 1 other person7.
...Before the new one, I! Izumi L...Karasu Kashisa/6...Sukeso Kashisame Karikaku Figure 5 θ, teaching 17 bending yakuhose, No. 9
figure

Claims (1)

[Claims] An inner bag filled with powder such as perlite, and a plastic laminate that houses this inner bag, reduces the pressure inside, and heat-seals the periphery by cutting out the bending intersection where the bending line of the periphery overlaps when the periphery is folded in advance. An insulation pack consisting of an outer bag such as film.