JPS5772831A - Device for preventing back flow of resin in mold - Google Patents

Device for preventing back flow of resin in mold

Info

Publication number
JPS5772831A
JPS5772831A JP14941080A JP14941080A JPS5772831A JP S5772831 A JPS5772831 A JP S5772831A JP 14941080 A JP14941080 A JP 14941080A JP 14941080 A JP14941080 A JP 14941080A JP S5772831 A JPS5772831 A JP S5772831A
Authority
JP
Japan
Prior art keywords
shaft
resin
back flow
cylinder
retracted
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
JP14941080A
Other languages
Japanese (ja)
Inventor
Toshiji Sakuma
Masamichi Takeshita
Masao Takagi
Kiyoshi Wada
Hisashi Nichibe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14941080A priority Critical patent/JPS5772831A/en
Publication of JPS5772831A publication Critical patent/JPS5772831A/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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • B29C2045/5625—Closing of the feed opening before or during compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Landscapes

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

Abstract

PURPOSE:To prevent a resin from flowing back at the time of injection compression molding by using a back flow preventing device having the second shaft which is capable of being freely advanced and retracted to adjust the volume of a runner part, and the first shaft which closed sprue part by a link mechanism. CONSTITUTION:The back flow preventing device 24 used for the injection compression molding of a resin lens or the like is comprised of the first shaft 1 connected to a cylinder 3 by the link mechanism, and the second shaft 2 also connected to the cylinder 3. In the condition where the first shaft 1 is retracted while the second shaft 2 is advanced to reduce the volume of the runner part 27, a molten resin is injected into a cavity 29 through the sprue part 26. Then, by advancing the cylinder 3, the second shaft 2 is retracted and the first shaft 1 is advanced to close the sprue part 26 by its end part, thereby contriving to prevent the back flow of resin. Thereafter, a cylinder 33 is operated to compress the resin in the cavity 29.
JP14941080A 1980-10-27 1980-10-27 Device for preventing back flow of resin in mold Pending JPS5772831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14941080A JPS5772831A (en) 1980-10-27 1980-10-27 Device for preventing back flow of resin in mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14941080A JPS5772831A (en) 1980-10-27 1980-10-27 Device for preventing back flow of resin in mold

Publications (1)

Publication Number Publication Date
JPS5772831A true JPS5772831A (en) 1982-05-07

Family

ID=15474509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14941080A Pending JPS5772831A (en) 1980-10-27 1980-10-27 Device for preventing back flow of resin in mold

Country Status (1)

Country Link
JP (1) JPS5772831A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0968807A1 (en) * 1998-07-01 2000-01-05 Hoya Corporation Injection compression moulding method and injection compression moulding machine
WO2014140986A1 (en) * 2013-03-15 2014-09-18 Sabic Innovative Plastics Ip B.V. Shut off nozzle system and methods for making and using the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0968807A1 (en) * 1998-07-01 2000-01-05 Hoya Corporation Injection compression moulding method and injection compression moulding machine
US6767482B2 (en) 1998-07-01 2004-07-27 Hoya Corporation Injection compression molding method and injection compression molding machine
WO2014140986A1 (en) * 2013-03-15 2014-09-18 Sabic Innovative Plastics Ip B.V. Shut off nozzle system and methods for making and using the same
US20140275443A1 (en) * 2013-03-15 2014-09-18 Sabic Innovative Plastics Ip B.V. Shut off nozzle system and methods for making and using the same
US9174372B2 (en) 2013-03-15 2015-11-03 Sabic Global Technologies B.V. Shut off nozzle system and methods for making and using the same
CN105163923A (en) * 2013-03-15 2015-12-16 沙特基础全球技术有限公司 Shut off nozzle system and methods for making and using the same

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