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JPS552003A - Molding of polyurethane - Google Patents

Molding of polyurethane

Info

Publication number
JPS552003A
JPS552003A JP7374078A JP7374078A JPS552003A JP S552003 A JPS552003 A JP S552003A JP 7374078 A JP7374078 A JP 7374078A JP 7374078 A JP7374078 A JP 7374078A JP S552003 A JPS552003 A JP S552003A
Authority
JP
Japan
Prior art keywords
molds
polyurethane
molded
divided
closed
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.)
Granted
Application number
JP7374078A
Other languages
Japanese (ja)
Other versions
JPS6210813B2 (en
Inventor
Akira Nishihara
Kunio Naganami
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.)
AGC Inc
Original Assignee
Asahi Glass 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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP7374078A priority Critical patent/JPS552003A/en
Publication of JPS552003A publication Critical patent/JPS552003A/en
Publication of JPS6210813B2 publication Critical patent/JPS6210813B2/ja
Granted 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To provide a molded poyurethane having fine surfaces in RIM molding process for polyurethane by controlling the temperature of molds and the pressure in the molds. CONSTITUTION:In a RIM molding process for obtaining a molded polyurethane wherein at least two liquid raw components are mixed and injected into closed molds, the closed molds comprises at least two divided molds (an upper mold 1 and a lower mold 2) which can be clamped, and the temperature of one (for example the lower mold 2) of the divided molds where fine surfaces of a molded polyurethane are required is caused to be 5 deg.C higher than that of the other divided mold (for example the upper mold 1). After the liquid raw components has been injected into the closed molds, the clamping pressure will rapidly be reduced or a gas will be introduced into the closed molds. EFFECT:The adherence between surfaces of a molded article where its finess is required and inner surfaces of molds is improved to lessen uneveness or scars on the surface of the molded article due to the peeling, etc.
JP7374078A 1978-06-20 1978-06-20 Molding of polyurethane Granted JPS552003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7374078A JPS552003A (en) 1978-06-20 1978-06-20 Molding of polyurethane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7374078A JPS552003A (en) 1978-06-20 1978-06-20 Molding of polyurethane

Publications (2)

Publication Number Publication Date
JPS552003A true JPS552003A (en) 1980-01-09
JPS6210813B2 JPS6210813B2 (en) 1987-03-09

Family

ID=13526929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7374078A Granted JPS552003A (en) 1978-06-20 1978-06-20 Molding of polyurethane

Country Status (1)

Country Link
JP (1) JPS552003A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56146743A (en) * 1980-04-18 1981-11-14 Asahi Glass Co Ltd Responsive injection molding

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833630A (en) * 1971-08-24 1973-05-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833630A (en) * 1971-08-24 1973-05-11

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56146743A (en) * 1980-04-18 1981-11-14 Asahi Glass Co Ltd Responsive injection molding
JPS6315888B2 (en) * 1980-04-18 1988-04-06 Asahi Glass Co Ltd

Also Published As

Publication number Publication date
JPS6210813B2 (en) 1987-03-09

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