JP3255689B2 - Manufacturing method of heat insulation box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a heat insulating box used for a refrigerator, a showcase, and the like.

[0002]

2. Description of the Related Art In recent years, in order to save power in a heat insulating box of a refrigerator, a vacuum heat insulating material is arranged in the heat insulating box to greatly improve the heat insulating performance of the heat insulating box.

Hereinafter, a heat insulating box provided with the above-described vacuum heat insulating material will be described with reference to the drawings.

FIGS. 24 to 28 show a conventional example. 1 is a heat insulating box, 2 is an inner box made of plastic, and 3 is an outer box made of iron plate. Reference numeral 4 denotes a vacuum heat insulating material, which is a low gas permeable plastic film bag 5 laminated with a metal such as aluminum, a core material 6 such as pearlite powder or communicating hard urethane foam in the bag 5 and calcium hydroxide, activated carbon or the like. And a gas adsorbent 7. 61-2558
No. 5, Japanese Utility Model Publication No. 61-25587, the core material 6
Is a pearlite powder, but there is also a vacuum heat insulating material 4 when the core material 6 is a communicating rigid urethane foam. Vacuum insulation 4
Shows that the inside of the bag 5 is kept in a vacuum state of 9.3 Pa or less, and exhibits excellent heat insulation performance with a thermal conductivity of 0.0034 to 0.0058 W / mK. Here, the bag 5 of the vacuum heat insulating material 4
Is obtained by heat-welding the four peripheral edges 8 of two plastic films, so that the shape of the vacuum heat insulating material 4 becomes the shape of the core material 6.

[0005] That is, in the case of perlite powder, it becomes a retort pack shape of a commercially available food, and in the case of communicating hard urethane foam, it becomes a rectangular parallelepiped having a periphery 8 around the periphery, and the periphery 8 is wavy or wrinkled. Or In addition, the peripheral edge 8 must be at least 15
From 20mm in length.

The vacuum heat insulating material 4 is bonded and fixed to the inner box 2 and the outer box 3 with an adhesive layer 9 such as a hot melt or a double-sided tape, and is provided in a space 10 formed by the inner box 2 and the outer box 3. The closed cell hard urethane heat insulating material 11 is foam-filled.
Even if the closed-cell hard urethane heat insulating material 11 has the highest heat insulating performance, the heat conductivity is about 0.0128 W / mK. By using the vacuum heat insulating material 4 for the heat insulating wall 12, the power saving of the refrigerator can be reduced. it can. For example, if half of the wall thickness of the heat insulating wall 12 is made of the vacuum heat insulating material 4, the heat insulating performance of the whole heat insulating box 1 becomes 1.3 to 1.5 times, and 10 to 13% in the 400 liter class refrigerator. Power saving of refrigerator can be achieved. Therefore, as the volume of the vacuum heat insulating material 4 increases, power saving can be achieved.

[0007]

However, in the heat-insulating box constructed as described above, when the vacuum heat-insulating material is attached to the inner box or the outer box, the closed-cell hard urethane heat-insulating material foams during the foaming and filling process . The welded, wavy, and wrinkled margins impede the fluidity of the closed-cell rigid urethane insulation, causing voids and low-density spots. CFC 11 which is a foaming agent
(CCl ₃ F), Freon 22 (CHClF ₂ ), Freon 123
(CHCl ₂ CF ₃ ), Freon 141b (CH ₃ Cl ₂ F), and Freon 142b (CH ₃ CClF ₂ ) have a problem that a pressure change occurs in a Freon gas and a deformed portion occurs in the inner box and the outer box. Was. In order to prevent this, the heat-welded peripheral edge is made as short as possible or folded (see FIG. 2).
7), but it was not possible to completely prevent the four peripheral edges from impairing the fluidity because of the necessity of processing so as not to damage the peripheral edges of the plastic film.

It is also known that the thickness of the inner box and the outer box is increased to increase the rigidity and solve the deformation. However, it is necessary to increase the thickness of the inner box by 1.5 to 3 times or more. However, it could not be solved because there were other problems such as a decrease in the thickness of the steel sheet due to an increase in the plate thickness and a partial loss of heat insulation, an increase in weight and an increase in cost. In other words, vacuum insulation cannot be applied to the parts that require the appearance that consumers see, such as refrigerator doors, sides, and the inside of refrigerators. There is a problem that the method can be applied only to a portion where no vacuum heat insulating material is used, and the number of places where the vacuum heat insulating material is used cannot be increased.

In view of the above problems, the present invention, when the above-mentioned vacuum heat insulating material is attached to an inner box or an outer box, when the closed-cell hard urethane heat insulating material is foamed and filled, the above-mentioned heat-welded peripheral edge becomes independent. The fluidity of the foamed rigid urethane insulation is impaired, voids and low-density spots are generated, and the change in temperature causes a change in the pressure of Freon gas, which is the foaming agent for the closed-celled rigid urethane insulation. It is an object of the present invention to provide a method of manufacturing a heat insulating box in which the problem of deformation is solved and the place where the vacuum heat insulating material is used is also expanded to a part requiring an appearance to be seen by a consumer.

[0010]

Means for Solving the Problems In order to solve this problem,
The present invention provides a metal-deposited film in a concave shape having a peripheral edge.
Vacuum forming, then paste metal foil on the bottom in the concave shape
Then, a series of shapes matching the concave shape is formed in the concave shape.
Arrangement of rigid urethane foam and sheet type adsorbent,
Furthermore, a metal laminate fills on the sheet type adsorbent.
Cover with a concave sheet inside the vacuum chamber.
Fixed with a holding jig, and in a vacuum state, the metal deposition film
Of the metal laminate film sheet
And heat-sealed to create vacuum insulation, then the inner and outer boxes
Of the vacuum insulation material on the inner box surface or outer box surface
Paste the metal laminated film sheet surface and
A vacuum insulation material is fixed, and a closed cell hard
The insulation box is manufactured by foaming the urethane insulation.
You.

[0011] In order to solve this problem, the present invention provides:
Vacuum forming metal evaporated film into concave shape without peripheral edge
Then, paste a metal foil on the bottom in the concave shape,
In the concave shape, the communication hard corrugation having a shape corresponding to the concave shape.
Arranging the urethane foam and the sheet type adsorbent,
The other concave shape is true on the sheet type adsorbent.
Metal formed by empty molding and affixing metal foil to the bottom in the concave shape
Cover with a vapor deposition film
Fix with a holding jig in shape and deposit a concave metal in vacuum
Ultrasonic welding of the overlap margin on the side of the film
Heat material is made, then the inner box surface of the space consisting of the inner box and the outer box
Or affix the vacuum insulation material to the outer box surface and fix it.
In the above space, closed-cell hard urethane insulation is foamed and cut.
The heat box is manufactured.

[0012]

According to the present invention , the peripheral edge is a metal laminate fill.
Matches Mushito surface, and waves Uttari, wrinkles closer
It is very easy to manufacture uninsulated vacuum insulation
Because the peripheral edge of the vacuum insulating material is not located in the hollow space of the inner box and the outer box, it is attached and fixed to the inner box surface or outer box surface, so the closed cell rigid urethane insulating material is foam-filled In the process, the peripheral edge does not hinder the fluidity of the closed-cell hard urethane heat insulating material, and voids and low-density portions do not occur. Therefore, even if the pressure changes in the fluorocarbon gas, which is the foaming agent of the closed-cell rigid urethane insulation, due to a change in temperature, the inner and outer boxes are not deformed, and the volume of vacuum insulation used by the user can be seen. This has the effect that it can be expanded to a part requiring a good appearance.

In the present invention , a vacuum heat insulating material having no peripheral edge is used as an electrode.
The vacuum insulation can be easily manufactured
When it is fixed to the surface or the outer box surface, since there is no peripheral edge, the closed-cell hard urethane heat insulating material does not impair the fluidity during the foam filling process, and does not generate voids or low-density portions. Therefore, even if the pressure changes in the fluorocarbon gas, which is the foaming agent of the closed-cell rigid urethane insulation, due to a change in temperature, the inner and outer boxes are not deformed, and the volume of vacuum insulation used by the user can be seen. This has the effect that it can be expanded to a part requiring a good appearance.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described.
Manufacturing method, a heat-insulating box manufactured by the manufacturing method, and the heat-insulating box.
Vacuum insulation material used for the heat insulation box of Figs.
This will be described with reference to FIG. Note that the same components as those of the conventional example described with reference to FIGS. 24 to 28 are denoted by the same reference numerals, and detailed description thereof will be omitted.

1 to 4, reference numeral 15 denotes a peripheral edge 16;
, And reference numeral 17 denotes an aluminum foil adhered to the bottom of the concave shape. Reference numeral 18 denotes a communicating rigid urethane foam disposed in the concave portion, and reference numeral 19 denotes a sheet type adsorbent. Reference numeral 20 denotes an aluminum laminated film sheet, which is thermally welded to the concave aluminum deposition film 15 and the peripheral edge 16. The aluminum vapor-deposited film 15 is formed by bonding a plastic film of polyester, polyethylene, vinyl chloride, or the like in a multilayer of several hundred μ, and performing aluminum vapor deposition of several μ to several tens μ on a part thereof. It has a function of blocking CFC gas and carbon dioxide gas contained in the heat insulating material 11. Here, aluminum may be another metal such as copper or gold.

Also, an aluminum laminated film sheet 2
0 is more than 10 μm in a part of the multilayer plastic film.
And has the function of shutting off the gas. The reason why aluminum vapor deposition and aluminum foil are selectively used is that the aluminum vapor deposition film 15 needs to be formed into a concave shape, and therefore, the gas barrier property is inferior to the aluminum laminate film sheet 20.
Is glued separately. Communication rigid urethane foam 18
Is a rigid urethane foam in which all cells are open cells, and has a strength that can withstand the atmospheric pressure when vacuum degassing is performed. The sheet-type adsorbent 19 is obtained by mixing a gas adsorbent such as calcium hydroxide and activated carbon with an adhesive and compressing the same into a sheet as in the conventional example.

In such a configuration, the peripheral edge 16 of the vacuum heat insulating material 4 coincides with the surface of the aluminum laminated film sheet 20 and is not wavy or wrinkled. Since the adhesive layer 9 can be fixed to the three surfaces without any gap, the peripheral edge 16 does not hinder the fluidity of the closed cell hard urethane heat insulating material 11 in the process of foaming and filling the closed cell hard urethane heat insulating material 11. No voids or low density portions 13 are generated. Therefore, even if the pressure changes in the fluorocarbon gas, which is the foaming agent of the closed-cell hard urethane insulating material 11, due to a change in temperature, the inner box and the outer box are not deformed, and the usage volume of the vacuum insulating material is determined by the user. There is an effect that it can be expanded to a portion requiring an appearance (not only the rear surface of the heat-insulating box 1 but also doors, side surfaces, and a top surface) (see FIG. 23).

Next, a method of manufacturing the heat insulating box is shown in FIGS. The same configurations as those of the conventional example described with reference to FIGS. 1 to 4 and FIGS. 24 to 28 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0019] This example, vacuum molded in a concave shape having a peripheral edge 16 of the aluminum-deposited film 15, and then paste the aluminum foil 17 in <br/> bottom of the concave shape, then in the concave shape To
Arranged and communicating rigid urethane foam 11 and the sheet-type adsorbent 19 of a shape matching the concave shape, yet Sheet
Aluminum laminated film sheet 20 on adsorbent 19
Those covered were fixed with concave holding jig 22 in the vacuum chamber -21, and the peripheral edge 16 of the aluminum deposited film 15 at 9.3Pa or less vacuum state in the welding jig 23 Aluminum
The vacuum heat insulating material 4 is formed by heat welding the peripheral edge of the laminated film sheet 20 . Next, the above-mentioned aluminum laminated film sheet 20 of the vacuum heat insulating material 4 is adhered to the inner box 2 surface or the outer box 3 surface of the space 10 composed of the inner box 2 and the outer box 3 with the adhesive layer 9 to attach the vacuum heat insulating material 4. This is a method for manufacturing a heat-insulating box 1 which is fixed and further foamed with closed-cell hard urethane heat-insulating material 11 in the space 10.

In such a manufacturing method, the peripheral edge 16 is flush with the surface of the aluminum laminated film sheet 20 due to the concave shape formed by vacuum forming and the thermal welding of the peripheral edge 16 while being fixed by the holding jig 22. It is possible to manufacture the vacuum heat insulating material 4 very easily without waving or wrinkling, and to use the vacuum heat insulating material in a portion that requires an appearance to be seen by a user (insulation box). There is an effect that the thermally insulated box body 1 expanded not only on the back surface of the body 1 but also on the door, side surface, and top surface can be stably and easily manufactured.
In addition, it is stuck on the bottom in the concave shape of the aluminum deposition film 15.
Closed cell hard urethane insulation with aluminum foil 17 attached
Gas from the material 11 side into the communicating rigid urethane foam 18
Suppresses intrusion and, if open, rigid polyurethane foam
Even if gas invades inside 18, the sheet type adsorbent 19
Efficiently adsorbs the insulation performance of the vacuum insulation material 4 over a long period of time.
Can be maintained.

Next, the heat insulation box according to the second embodiment of the present invention will be described.
Manufacturing method, heat insulating box manufactured by the manufacturing method, and
FIG. 13 shows a vacuum heat insulating material used for the heat insulating box .
This will be described with reference to FIG . Description In FIGS. 1-12
The same components as those of the first embodiment described above and the conventional example described with reference to FIGS. 24 to 28 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 24 denotes a concave aluminum vapor-deposited film having no peripheral edge 8, and reference numeral 25 denotes a concave aluminum vapor-deposited film which fits the upper and lower lids. Reference numeral 17 denotes an aluminum foil adhered to the concave bottom, reference numeral 18 denotes a communicating rigid urethane foam disposed in the concave portion, and reference numeral 19 denotes a sheet type adsorbent. 26 is an ultrasonic welding part.

In such a configuration, the vacuum heat insulating material 4
Indicates that the ultrasonic welding portion 26 is located on the side
When it is fixed to the inner box 2 or the outer box 3 with the adhesive layer 9, the closed cell hard urethane insulating material 11 does not impair the fluidity in the process of foam filling, and has no void or low density. Location 13 does not occur. Therefore, even if the pressure changes in the fluorocarbon gas, which is the foaming agent of the closed-cell hard urethane insulation 11, due to a change in temperature, the inner box and the outer box are not deformed, and the volume used of the vacuum insulation is reduced by the user. There is an effect that it can be expanded to a part requiring an appearance to be seen (not only the rear surface of the heat insulating box 1 but also a door, a side surface, and a top surface) (see FIG. 23).

Next, a method of manufacturing a heat insulating box is shown in FIGS. The same components as those of the conventional example described with reference to FIGS. 1 to 15 and FIGS. 24 to 28 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the aluminum deposited films 24 , 2
5 is vacuum formed into a concave shape having no peripheral edge 8, and then aluminum foil 17 is attached to the bottom of the concave shape of the aluminum vapor-deposited films 24 , 25 . A communicating rigid urethane foam 11 and a sheet-type adsorbent 19 having a shape corresponding to the concave shape are arranged in the concave shape, and furthermore,
To another concave shape on the sheet type adsorbent 19
A vacuum-formed concave jig 22 in a vacuum chamber 21 is fixed by covering an aluminum vapor-deposited film 25 with an aluminum foil 17 adhered to the bottom in the hollow shape. The holding jig 22 is provided with an ultrasonic welding terminal 27 in close contact with the side surface portion of the peripheral edge of the aluminum vapor deposition film 25. When the vacuum chamber 21 is brought into a vacuum state of 9.3 Pa or less, the aluminum vapor deposition terminal 27 is pressed. The overlap portions 26 on the side surfaces of the films 24 and 25 are ultrasonically welded to form an ultrasonic weld 27, and the vacuum heat insulating material 4 is produced. Next , the aluminum-deposited film 2 is placed on the inner box 2 or the outer box 3 of the space 10 comprising the inner box 2 and the outer box 3.
5 is adhered and fixed with an adhesive layer 9, and the space 1 is further fixed.
This is a method for manufacturing a heat-insulating box 1 made by foaming a closed-cell hard urethane heat-insulating material 11. In this embodiment, the surface of the aluminum vapor-deposited film 25 is adhered with the adhesive layer 9. However, since the aluminum foil 17 is also adhered to the bottom of the concave shape of the aluminum vapor-deposited film 25, the aluminum vapor-deposited film 2
The surface 4 may be attached with the adhesive layer 9.

In such a manufacturing method, a concave shape having no peripheral edge 8 is formed by vacuum forming, and an ultrasonic welding portion 27 is formed while being fixed by a holding jig 22 having an ultrasonic welding terminal 28. Since the manufacture of the vacuum heat insulating material 4 can be made extremely easy, the use volume of the vacuum heat insulating material is required for the appearance to be seen by the user (not only the rear surface of the heat insulating box 1 but also doors, side surfaces, and top surfaces). Insulated box 1 also expanded
Can be manufactured stably and easily. Also, the bottom of the concave portion of the aluminum deposition film 24
Closed cell hard urethane by aluminum foil 17 stuck on
Into the communicating rigid urethane foam 18 from the heat insulating material 11 side
Suppress gas intrusion, and if it communicates with rigid urethane
Sheet-type adsorbent even if gas enters the foam 18
Effectively adsorbs at 19 for long term insulation performance of vacuum insulation material 4
Can be maintained.

[0027]

As is apparent from the above description, the vacuum heat insulating material manufactured by the method for manufacturing a heat insulating box according to the present invention has a peripheral edge,
Since it conforms to the metal laminated film sheet surface and does not wrinkle or wrinkle, it can be fixed to the inner box or outer box surface with an adhesive layer without gaps, so the closed cell hard urethane insulation foams During the filling process, the peripheral edge does not inhibit the fluidity of the closed-cell hard urethane heat insulating material, and voids and low-density portions do not occur. Therefore, even if the pressure changes in the fluorocarbon gas, which is the foaming agent of the closed-cell rigid urethane insulation, due to a change in temperature, the inner and outer boxes are not deformed, and the volume of vacuum insulation used by the user can be seen. There is an effect that it can be expanded to a part requiring an external appearance (a door, a side surface, and a top surface as well as the back of the heat insulating box). In addition, the vacuum insulation material having the above characteristics can be extremely easily formed.
Insulation with the above characteristics which can be manufactured
The effect is that the box can be manufactured stably and easily.
There is fruit. Also, at the bottom of the concave shape of the metallized film
Closed-cell rigid urethane insulation material with attached metal foil
Gas enters the rigid polyurethane foam from the side
If there is gas in the communicating rigid urethane foam
Even if it has penetrated, it is efficiently adsorbed by the sheet-type adsorbent and
Insulation performance of air insulation can be maintained for a long time
You.

Further , it is manufactured by the method for manufacturing a heat insulating box of the present invention .
Since the vacuum insulating material does not have a peripheral edge, fluidity is not hindered in the process of foam filling of the closed-cell hard urethane heat insulating material, and voids and low-density portions do not occur. Therefore, even if the pressure changes in the freon gas, which is the foaming agent of the closed-cell rigid urethane insulation, due to changes in temperature,
There is an effect that the inner box and the outer box are not deformed, and the used volume of the vacuum heat insulating material can be expanded to a part that requires the appearance seen by the consumer. In addition, the vacuum disconnection having the above-mentioned features
Heating material can be manufactured very easily, and
Stable and easy manufacture of insulated boxes with features
There is an effect that can be. In addition, metal deposition film
Closed cell hardened by metal foil attached to the bottom of the concave shape
Urethane insulation material into the communicating rigid urethane foam
Suppress gas intrusion, and if it communicates with rigid urethane
Even if gas enters the dome, it is effective with the sheet-type adsorbent.
Adsorbs efficiently and maintains the insulation performance of vacuum insulation material for a long time.
You can have.

[Brief description of the drawings]

FIG. 1 shows a method of manufacturing a heat insulating box according to a first embodiment of the present invention.
Sectional view of the vacuum insulation material of the manufactured insulation box

FIG. 2 is a partially cutaway perspective view of the vacuum heat insulating material.

FIG. 3 is a cross-sectional view of the thermal insulation box manufactured by the method for manufacturing a heat insulating box of the embodiment .

FIG. 4 is a sectional view of a main part of the heat insulating box.

FIG. 5 is a perspective view of an aluminum vapor-deposited film used in the method for manufacturing a heat-insulating box of the embodiment.

FIG. 6 is a perspective view of a vacuum-formed aluminum vapor-deposited film used in the method for manufacturing a heat-insulating box of the embodiment.

FIG. 7 is a perspective view showing a step of attaching an aluminum foil to a vacuum-formed aluminum vapor-deposited film in the method of manufacturing the heat-insulating box of the embodiment.

FIG. 8 is a perspective view showing a process in which a communicating hard urethane foam and a sheet-type adsorbent are provided after affixing aluminum foil to a vacuum-formed aluminum vapor-deposited film in the method for manufacturing a heat-insulating box of the embodiment.

Shows a step distribution communication rigid urethane foam and the sheet type adsorbent after casting, which further disposed an aluminum laminate film sheet and the aluminum-deposited film was vacuum molded in [9] the production method of the heat-insulating main body of the embodiment Perspective view

FIG. 10 shows a method of manufacturing a heat-insulating box according to the embodiment, in which a hard urethane foam, a sheet-type adsorbent, and an aluminum laminated film sheet are connected to a vacuum-formed aluminum vapor-deposited film, and the peripheral edge is heated in a vacuum chamber. Perspective view showing the process of making a vacuum insulation material by welding

Figure 11 is a perspective view of a vacuum heat insulator made more manufacturing method of the heat-insulating main body of the embodiment

FIG. 12 is a cross-sectional view of a heat insulating box formed by bonding a vacuum heat insulating material to an outer box and foam-filling a closed cell urethane heat insulating material in the method of manufacturing the heat insulating box of the embodiment.

FIG. 13 is a method for manufacturing a heat insulating box according to a second embodiment of the present invention.
Sectional view of the vacuum insulation material of the heat insulation box manufactured in

FIG. 14 is a partially cutaway perspective view of the vacuum heat insulating material.

FIG. 15 is a cross-sectional view of a main part of the heat-insulating box manufactured by the method for manufacturing a heat-insulating box according to the embodiment.

FIG. 16 is a perspective view of an aluminum vapor-deposited film used in the method for manufacturing a heat-insulating box of the embodiment.

FIG. 17 is a perspective view of a vacuum-formed aluminum vapor-deposited film used in the method for manufacturing a heat-insulating box of the embodiment.

FIG. 18 is a perspective view showing a step of attaching an aluminum foil to a vacuum-formed aluminum vapor-deposited film in the method of manufacturing the heat-insulating box of the embodiment.

FIG. 19 is a diagram illustrating a method for manufacturing a heat insulating box according to the same embodiment, in which a hard urethane foam, a sheet-type adsorbent, and an aluminum laminated film sheet are connected to a vacuum-formed aluminum vapor-deposited film. Perspective view showing the process of making vacuum insulation by heat welding

FIG. 20 shows a method of manufacturing a heat-insulating box according to the same embodiment, after attaching an aluminum foil to a vacuum-formed aluminum vapor-deposited film.
Arrange communication rigid urethane foam and sheet type adsorbent,
Perspective view showing the process of covering another vacuum-formed aluminum vapor-deposited film

FIG. 21 is a cross-sectional view of a heat insulating box formed by bonding a vacuum heat insulating material to an outer box and foam-filling a closed cell hard urethane heat insulating material in the method of manufacturing the heat insulating box of the embodiment.

Figure 22 is a perspective view of a vacuum heat insulator made more manufacturing method of the heat-insulating main body of the embodiment

FIG. 23 is a perspective view of the heat insulating box manufactured by the method of manufacturing the heat insulating box according to the embodiment, with a part cut away from an oblique rear side.

FIG. 24 is a cross-sectional view of a conventional heat-insulating box.

FIG. 25 is a sectional view of a vacuum heat insulating material of a conventional heat insulating box.

FIG. 26 is a sectional view of a vacuum heat insulating material of a conventional heat insulating box.

FIG. 27 is a sectional view of a vacuum heat insulating material of a conventional heat insulating box.

FIG. 28 is a sectional view of a main part of a heat insulating box of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Insulation box 2 Inner box 3 Outer box 4 Vacuum insulation material 9 Adhesive layer 10 Space 11 Closed cell rigid urethane insulation material 15 Aluminum vapor deposition film formed in concave shape with peripheral edge 16 Peripheral edge 17 Aluminum foil 18 Continuous rigid urethane foam DESCRIPTION OF SYMBOLS 19 Sheet-type adsorbent 20 Aluminum laminated film sheet 21 Vacuum chamber 22 Holding jig 24 Aluminum vapor-deposited film formed into concave shape without peripheral edge 25 Aluminum vapor-deposited film molded into concave shape without peripheral edge 26 Overlapping part 27 Super Sound weld

──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshiro Murono 3-22 Takaida Hondori, Higashi Osaka City, Osaka Prefecture Inside Matsushita Refrigerating Machinery Co., Ltd. (72) Yasuaki Tanimoto 3-22 Takaida Hondori, Higashi Osaka City, Osaka Prefecture Address Matsushita Refrigeration Co., Ltd. (56) References JP-A-63-204089 (JP, A) JP-A-61-3738 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 23/06

Claims (2)

(57) [Claims] 1. A metal-deposited film having a concave shape having a peripheral edge.
Vacuum forming into a shape, and then attaching metal foil to the bottom in the concave shape
And then within the concave shape a shape that matches the concave shape
Of rigid urethane foam and sheet type adsorbent
And a metal laminate film on the sheet type adsorbent.
Cover the film sheet with the concave in the vacuum chamber.
It is fixed with a holding jig of the shape, and the metal deposition
And the periphery of the metal laminated film sheet.
Heat-welding the edge to make vacuum insulation, then inner and outer boxes
Vacuum insulation on the inner box surface or outer box surface of the space consisting of
Paste the metal laminated film sheet surface of the material
The vacuum insulation material is fixed, and a closed cell hard
To manufacture a heat-insulating box made of foamed urethane insulation
Law. 2. The method according to claim 1, wherein the metal-deposited film is formed in a concave shape having no peripheral edge.
Vacuum forming into a shape, then metal foil on the bottom in the concave shape
Affixing, then a shape matching said concave shape within said concave shape
Of rigid urethane foam and sheet type adsorbent
And further another another on the sheet type adsorbent.
Vacuum forming into the concave shape and metal foil on the bottom in the concave shape
Cover the metal-deposited film with the vacuum
Fix with a concave holding jig in the chamber and
Ultrasonic wave on the overlapping margin on the side of the metallized film
Weld to create vacuum insulation, then consist of inner and outer boxes
Paste the vacuum insulation material on the inner box surface or outer box surface of the space
And closed-cell hard urethane insulation in the space
A method of manufacturing a heat-insulated box made of foam.