JPS5757637A - Manufacturing of heat insolating box - Google Patents

Manufacturing of heat insolating box

Info

Publication number
JPS5757637A
JPS5757637A JP55132904A JP13290480A JPS5757637A JP S5757637 A JPS5757637 A JP S5757637A JP 55132904 A JP55132904 A JP 55132904A JP 13290480 A JP13290480 A JP 13290480A JP S5757637 A JPS5757637 A JP S5757637A
Authority
JP
Japan
Prior art keywords
box
protective film
liquid
void
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55132904A
Other languages
Japanese (ja)
Inventor
Reiji Naka
Kazuyoshi Kuroishi
Isao Obara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55132904A priority Critical patent/JPS5757637A/en
Publication of JPS5757637A publication Critical patent/JPS5757637A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1228—Joining preformed parts by the expanding material
    • B29C44/1242—Joining preformed parts by the expanding material the preformed parts being concentric

Landscapes

  • Refrigerator Housings (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a heat insulating box of good quality, which does not allow insulating liquid to impinge on each other and has no void on the surface, by providing in the neighborhood of an inlet for injection of foamable insulating material a protective film so as not to allow the insulating material to slip off from rear surface toward the front surface of the box. CONSTITUTION:Urethane liquid is injected into an inlet 3 from an injecting nozzle 7 while keeping opening to the bottom side, it is further hit against an outer box assembly 1 and made to fall rapidly by the function of a protective film 4 so as to make foam come up, and at the same time, impinging phenomenon among foam is alleviated so as to obtain an objectie box with less resin and void on the surface. Further, aluminum foil is effective for the protective film, and the film thickness should preferably be less than 30mu. The protective film has only to cover the area of attaching of the material liquid. EFFECT:Distribution of specific gravity, etc. is improved.
JP55132904A 1980-09-26 1980-09-26 Manufacturing of heat insolating box Pending JPS5757637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132904A JPS5757637A (en) 1980-09-26 1980-09-26 Manufacturing of heat insolating box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132904A JPS5757637A (en) 1980-09-26 1980-09-26 Manufacturing of heat insolating box

Publications (1)

Publication Number Publication Date
JPS5757637A true JPS5757637A (en) 1982-04-06

Family

ID=15092251

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132904A Pending JPS5757637A (en) 1980-09-26 1980-09-26 Manufacturing of heat insolating box

Country Status (1)

Country Link
JP (1) JPS5757637A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583547A1 (en) * 1985-06-18 1986-12-19 Primat Didier Automatic electronic method of shape analysis, for distinguishing the symmetric sensitive areas of a scene and their centres of symmetry
JP2017048956A (en) * 2015-09-01 2017-03-09 日立アプライアンス株式会社 Hot water storage tank unit
CN111735265A (en) * 2020-06-22 2020-10-02 长虹美菱股份有限公司 Refrigerator door body capable of preventing foaming shrinkage deformation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583547A1 (en) * 1985-06-18 1986-12-19 Primat Didier Automatic electronic method of shape analysis, for distinguishing the symmetric sensitive areas of a scene and their centres of symmetry
JP2017048956A (en) * 2015-09-01 2017-03-09 日立アプライアンス株式会社 Hot water storage tank unit
CN111735265A (en) * 2020-06-22 2020-10-02 长虹美菱股份有限公司 Refrigerator door body capable of preventing foaming shrinkage deformation
CN111735265B (en) * 2020-06-22 2021-12-21 长虹美菱股份有限公司 Refrigerator door body capable of preventing foaming shrinkage deformation

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