JPS57174225A - Production of foamed polyurethane panel body - Google Patents

Production of foamed polyurethane panel body

Info

Publication number
JPS57174225A
JPS57174225A JP56060409A JP6040981A JPS57174225A JP S57174225 A JPS57174225 A JP S57174225A JP 56060409 A JP56060409 A JP 56060409A JP 6040981 A JP6040981 A JP 6040981A JP S57174225 A JPS57174225 A JP S57174225A
Authority
JP
Japan
Prior art keywords
polyurethane
foamed polyurethane
pressure
foamed
time
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
JP56060409A
Other languages
Japanese (ja)
Inventor
Takaaki Yoshida
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56060409A priority Critical patent/JPS57174225A/en
Publication of JPS57174225A publication Critical patent/JPS57174225A/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
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3419—Quick cooling
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Abstract

PURPOSE:To shorten the period of time required for releasing a foamed polyurethane molded body from a mold and contrive to enhance productivity by forcibly cooling a polyurethane after the time of the maximum foaming pressure, when reforming the polyurethane being foamed in a frame to the final shape by intermittently exerting a pressure. CONSTITUTION:During reforming by intermittently exerting a pressure, a piercing plate 19a is lowered to pierce cooling holes 25 in the foamed polyurethane 5 by piercing needles 22. Before or after the piercing operation, a gas is blown to the foamed polyurethane 5 by a blower 21 after the time of the maximum foaming pressure of the polyurethane 5. The heat of reaction of the foamed polyurethane 5 is removed by the heat radiating effect of the holes 25, so that the entire body including the interior is cooled at a uniform rate. While the polymer strength is rapidly increased, the gas pressure in cells of the foamed polyurethane is rapidly lowered, the foaming pressure determined by the balance of the two is relatively reduced, and the residual foaming pressure is lowered to a target value in a short period of time.
JP56060409A 1981-04-21 1981-04-21 Production of foamed polyurethane panel body Pending JPS57174225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56060409A JPS57174225A (en) 1981-04-21 1981-04-21 Production of foamed polyurethane panel body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56060409A JPS57174225A (en) 1981-04-21 1981-04-21 Production of foamed polyurethane panel body

Publications (1)

Publication Number Publication Date
JPS57174225A true JPS57174225A (en) 1982-10-26

Family

ID=13141346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56060409A Pending JPS57174225A (en) 1981-04-21 1981-04-21 Production of foamed polyurethane panel body

Country Status (1)

Country Link
JP (1) JPS57174225A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62204913A (en) * 1986-03-05 1987-09-09 Wako Seisakusho:Kk Molding method
US5776390A (en) * 1992-12-15 1998-07-07 Scriptoria N.V. Method of forming boards of foam polyolefin using needle punching to release blowing agent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62204913A (en) * 1986-03-05 1987-09-09 Wako Seisakusho:Kk Molding method
JPH0344884B2 (en) * 1986-03-05 1991-07-09 Wako Seisakusho Kk
US5776390A (en) * 1992-12-15 1998-07-07 Scriptoria N.V. Method of forming boards of foam polyolefin using needle punching to release blowing agent

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