JPS55148136A - Injection molding method of synthetic resin - Google Patents

Injection molding method of synthetic resin

Info

Publication number
JPS55148136A
JPS55148136A JP5568079A JP5568079A JPS55148136A JP S55148136 A JPS55148136 A JP S55148136A JP 5568079 A JP5568079 A JP 5568079A JP 5568079 A JP5568079 A JP 5568079A JP S55148136 A JPS55148136 A JP S55148136A
Authority
JP
Japan
Prior art keywords
pressurized gas
resin
cavity
alloy member
porous
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
JP5568079A
Other languages
Japanese (ja)
Inventor
Akio Yasuike
Koji Nagahara
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 JP5568079A priority Critical patent/JPS55148136A/en
Publication of JPS55148136A publication Critical patent/JPS55148136A/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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • B29C2043/527—Heating or cooling selectively cooling, e.g. locally, on the surface of the material

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent the molten resin from entering into a porous part and to facilitate the injection molding of the synthetic resin, by using a porous alloy member to make a part of a pasage for supplying pressurized gas into a cavity and by cooling the porous alloy member when the pressurized gas is supplied. CONSTITUTION:A valve 6 is opened to supply pressurized gas from a pressurized gas source 7 into a metal mold cavity 1 through a passage hole 5, a porous sintered alloy member 4 and a pressurized gas distribution channel 8 to keep the cavity 1 under the pressurized gas. At that time, the sintered alloy member 4 is cooled by the pressurized gas which flows through the member. When resin made plastic by heat but not yet foamed is injected, the pressurized gas is removed out of the cavity and returned into the pressurized gas source 7 through said passages in reverse. Since the pressurized gas acts to the metal mold cavity 1, the resin is kept from being foamed. After the resin injection, the valve 6 is closed and a pressurized gas releasing valve 12 is opened to entirely remove the pressurized gas to foam and mold the injected resin.
JP5568079A 1979-05-09 1979-05-09 Injection molding method of synthetic resin Pending JPS55148136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5568079A JPS55148136A (en) 1979-05-09 1979-05-09 Injection molding method of synthetic resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5568079A JPS55148136A (en) 1979-05-09 1979-05-09 Injection molding method of synthetic resin

Publications (1)

Publication Number Publication Date
JPS55148136A true JPS55148136A (en) 1980-11-18

Family

ID=13005602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5568079A Pending JPS55148136A (en) 1979-05-09 1979-05-09 Injection molding method of synthetic resin

Country Status (1)

Country Link
JP (1) JPS55148136A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6153122U (en) * 1984-09-11 1986-04-10
WO2002055281A1 (en) * 2001-01-10 2002-07-18 Grupo Antolin-Ingenieria, S.A. Cooling and counter-pressure method for producing plastic parts by injection
KR20020061658A (en) * 2001-01-17 2002-07-25 성 운 차 A Pressure Controllable Mold for High Quality Surface of Foamed Parts
WO2019154022A1 (en) * 2018-02-08 2019-08-15 合肥华凌股份有限公司 Method for preparing box, box for refrigeration device and refrigeration device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6153122U (en) * 1984-09-11 1986-04-10
JPH0243697Y2 (en) * 1984-09-11 1990-11-20
WO2002055281A1 (en) * 2001-01-10 2002-07-18 Grupo Antolin-Ingenieria, S.A. Cooling and counter-pressure method for producing plastic parts by injection
KR20020061658A (en) * 2001-01-17 2002-07-25 성 운 차 A Pressure Controllable Mold for High Quality Surface of Foamed Parts
WO2019154022A1 (en) * 2018-02-08 2019-08-15 合肥华凌股份有限公司 Method for preparing box, box for refrigeration device and refrigeration device

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