JPS54149774A - Injection molding of thick-wall article - Google Patents

Injection molding of thick-wall article

Info

Publication number
JPS54149774A
JPS54149774A JP5751378A JP5751378A JPS54149774A JP S54149774 A JPS54149774 A JP S54149774A JP 5751378 A JP5751378 A JP 5751378A JP 5751378 A JP5751378 A JP 5751378A JP S54149774 A JPS54149774 A JP S54149774A
Authority
JP
Japan
Prior art keywords
thick
cavity
injection molding
pressurized gas
agent
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
JP5751378A
Other languages
Japanese (ja)
Inventor
Hiroshi Kataoka
Akio Yasuike
Tadashi Nanun
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.)
Asahi Dow Ltd
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Dow Ltd
Asahi Chemical Industry 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 Dow Ltd, Asahi Chemical Industry Co Ltd filed Critical Asahi Dow Ltd
Priority to JP5751378A priority Critical patent/JPS54149774A/en
Priority to US05/918,694 priority patent/US4229395A/en
Publication of JPS54149774A publication Critical patent/JPS54149774A/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
    • B29C44/10—Applying counter-pressure during expanding
    • B29C44/105—Applying counter-pressure during expanding the counterpressure being exerted by a fluid
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0408—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a thick-wall foam efficiently with a small amount of a blowing agent, by pressurizing the mold cavity and by prolonging the injection molding time to utilize the blowing action of the agent. CONSTITUTION:The mold units 17 and 22 are clamped by the clamping unit 26 with a small force within a clamping coefficient of 10-40. A pressurized gas is fed to pressurize the cavity 23. A molten synthetic resin material containing 0.05- 5 wt.% of a blowing agent is injected from the cylinder 31 for 3 see or longer, preferably 5-20 sec. The pressurized gas is released from the cavity 23 during the injection, and a molded article is cooled to give a thick-wall foam having an average thickness of 3.5-100 mm.
JP5751378A 1976-03-13 1978-05-17 Injection molding of thick-wall article Pending JPS54149774A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5751378A JPS54149774A (en) 1978-05-17 1978-05-17 Injection molding of thick-wall article
US05/918,694 US4229395A (en) 1976-03-13 1978-06-23 Method for injection molding thick-walled articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5751378A JPS54149774A (en) 1978-05-17 1978-05-17 Injection molding of thick-wall article

Publications (1)

Publication Number Publication Date
JPS54149774A true JPS54149774A (en) 1979-11-24

Family

ID=13057807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5751378A Pending JPS54149774A (en) 1976-03-13 1978-05-17 Injection molding of thick-wall article

Country Status (1)

Country Link
JP (1) JPS54149774A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6169421A (en) * 1984-09-14 1986-04-10 Asahi Chem Ind Co Ltd Molding method of foamed molding
JP2016539026A (en) * 2013-11-22 2016-12-15 サン−ゴバン グラス フランス Method for forming glass sealing member for transportation means, window glass and mold for transportation means

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5168675A (en) * 1974-12-12 1976-06-14 Asahi Dow Ltd Hatsuhokatamonono seikeiho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5168675A (en) * 1974-12-12 1976-06-14 Asahi Dow Ltd Hatsuhokatamonono seikeiho

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6169421A (en) * 1984-09-14 1986-04-10 Asahi Chem Ind Co Ltd Molding method of foamed molding
JPH0533129B2 (en) * 1984-09-14 1993-05-18 Asahi Chemical Ind
JP2016539026A (en) * 2013-11-22 2016-12-15 サン−ゴバン グラス フランス Method for forming glass sealing member for transportation means, window glass and mold for transportation means

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