JPS5567430A - Metal mold for injection molding - Google Patents

Metal mold for injection molding

Info

Publication number
JPS5567430A
JPS5567430A JP14164378A JP14164378A JPS5567430A JP S5567430 A JPS5567430 A JP S5567430A JP 14164378 A JP14164378 A JP 14164378A JP 14164378 A JP14164378 A JP 14164378A JP S5567430 A JPS5567430 A JP S5567430A
Authority
JP
Japan
Prior art keywords
air vent
blocking means
injection molding
metal mold
air
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
JP14164378A
Other languages
Japanese (ja)
Inventor
Hirokuni Mamiya
Keiji Kagoshima
Teruyoshi Shibata
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP14164378A priority Critical patent/JPS5567430A/en
Publication of JPS5567430A publication Critical patent/JPS5567430A/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
    • B29C45/26—Moulds
    • B29C45/34—Moulds having venting means

Landscapes

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

Abstract

PURPOSE:To provide moldings free from mixed gas and air vent marks by using air vent blocking means and vacuum pumps in the deairing system. CONSTITUTION:On a connecting hole 11 of an air vent 2 to a cavity 1 is arranged an air vent blocking means 3 such as an air vent pin which may freely protrude upward. Slide doors or moving blocks other than the pin may serve as an air vent blocking means 3. In addition, a vacuum apparatus 4 is connected with the air vent 2 and sucks the air always or while resin is injected. When the injection is carried out at 80-100% and the gas in the cavity 1 is sucked, moldings free from vent marks can be obtained by blocking the air vent 3.
JP14164378A 1978-11-16 1978-11-16 Metal mold for injection molding Pending JPS5567430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14164378A JPS5567430A (en) 1978-11-16 1978-11-16 Metal mold for injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14164378A JPS5567430A (en) 1978-11-16 1978-11-16 Metal mold for injection molding

Publications (1)

Publication Number Publication Date
JPS5567430A true JPS5567430A (en) 1980-05-21

Family

ID=15296809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14164378A Pending JPS5567430A (en) 1978-11-16 1978-11-16 Metal mold for injection molding

Country Status (1)

Country Link
JP (1) JPS5567430A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107891585A (en) * 2017-11-30 2018-04-10 上海小糸车灯有限公司 Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107891585A (en) * 2017-11-30 2018-04-10 上海小糸车灯有限公司 Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds

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