JPS5656832A - Injection molding - Google Patents

Injection molding

Info

Publication number
JPS5656832A
JPS5656832A JP13395879A JP13395879A JPS5656832A JP S5656832 A JPS5656832 A JP S5656832A JP 13395879 A JP13395879 A JP 13395879A JP 13395879 A JP13395879 A JP 13395879A JP S5656832 A JPS5656832 A JP S5656832A
Authority
JP
Japan
Prior art keywords
cavity
blown
injected
blow pipe
gas
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
JP13395879A
Other languages
Japanese (ja)
Inventor
Kenji Takatani
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.)
Zojirushi Corp
Original Assignee
Zojirushi Vacuum Bottle 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 Zojirushi Vacuum Bottle Co Ltd filed Critical Zojirushi Vacuum Bottle Co Ltd
Priority to JP13395879A priority Critical patent/JPS5656832A/en
Publication of JPS5656832A publication Critical patent/JPS5656832A/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1706—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)

Abstract

PURPOSE:To obtain readily a hollow article excellent in surface luster and dimensional precision by a method wherein immediately after the material of a volume less than that of a cavity is injected, air is blown in the cavity, the injected material is pressed against a cavity wall, cooled and cured while the material is flowed by pushing. CONSTITUTION:Molten resin 7 of 1/3-1/2 of a cavity volume is injected into the cavity 4 from a nozzle 5 having a gas blow pipe 6 through a spool 2 and primary gas is blown in through the gas blow pipe 6 at the same time as the injection is completed. The primary gas enters the resin 7, flows the molten resin 7 along the wall surface of the cavity 4 and forms a surface layer quickly. After the molten resin 7 has formed a surface layer on the whole wall surface of the cavity 4, the secondary gas of high pressure is blown in from the gas blow pipe 6, the pressure is kept constant for the intended time, the resin is cooled and cured.
JP13395879A 1979-10-16 1979-10-16 Injection molding Pending JPS5656832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13395879A JPS5656832A (en) 1979-10-16 1979-10-16 Injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13395879A JPS5656832A (en) 1979-10-16 1979-10-16 Injection molding

Publications (1)

Publication Number Publication Date
JPS5656832A true JPS5656832A (en) 1981-05-19

Family

ID=15117048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13395879A Pending JPS5656832A (en) 1979-10-16 1979-10-16 Injection molding

Country Status (1)

Country Link
JP (1) JPS5656832A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4226390A1 (en) * 1991-08-13 1993-02-18 Toyoda Gosei Kk Injection moulding hollow articles - by inserting baffles at suitable points in cavity to deflect polymer shot and finally produce thicker wall when gas is melt injected
US5308574A (en) * 1991-05-08 1994-05-03 Mitsubishi Gas Chemical Company, Inc. Method of injection molding with air assist for making a handle-shaped molded article
US5887315A (en) * 1997-03-12 1999-03-30 Electrolux Llc Handle assembly for floor supported appliances
ITFI20100164A1 (en) * 2010-07-30 2012-01-31 Dini S R L S "EXTENDED HANDLE FOR COLLECTING AND DIRTING PALLET AND PROCEDURE FOR ITS REALIZATION"

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5071756A (en) * 1973-10-25 1975-06-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5071756A (en) * 1973-10-25 1975-06-13

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5308574A (en) * 1991-05-08 1994-05-03 Mitsubishi Gas Chemical Company, Inc. Method of injection molding with air assist for making a handle-shaped molded article
DE4226390A1 (en) * 1991-08-13 1993-02-18 Toyoda Gosei Kk Injection moulding hollow articles - by inserting baffles at suitable points in cavity to deflect polymer shot and finally produce thicker wall when gas is melt injected
US5395582A (en) * 1991-08-13 1995-03-07 Toyoda Gosei Co., Ltd. Hollow injection molding method
US5887315A (en) * 1997-03-12 1999-03-30 Electrolux Llc Handle assembly for floor supported appliances
ITFI20100164A1 (en) * 2010-07-30 2012-01-31 Dini S R L S "EXTENDED HANDLE FOR COLLECTING AND DIRTING PALLET AND PROCEDURE FOR ITS REALIZATION"

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