JPS5770626A - Resin backflow preventing mechanism of mold - Google Patents

Resin backflow preventing mechanism of mold

Info

Publication number
JPS5770626A
JPS5770626A JP14696880A JP14696880A JPS5770626A JP S5770626 A JPS5770626 A JP S5770626A JP 14696880 A JP14696880 A JP 14696880A JP 14696880 A JP14696880 A JP 14696880A JP S5770626 A JPS5770626 A JP S5770626A
Authority
JP
Japan
Prior art keywords
pin
mold
sprue
resin
heater
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
JP14696880A
Other languages
Japanese (ja)
Inventor
Masamichi Takeshita
Toshiji Sakuma
Hisao Inage
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 JP14696880A priority Critical patent/JPS5770626A/en
Publication of JPS5770626A publication Critical patent/JPS5770626A/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

Landscapes

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

Abstract

PURPOSE:To enable to select the shutoff time freely and operate by proper driving force by providing the freely reciprocating pin having a reversely tapered protrusion, a built-in heater, a tapering part and a pin driving part to the mold for injection, compression molding. CONSTITUTION:The pin 2' is arranged on an extension from the sprue 1' of the mold and a reversely tapered protrusion 3' is provided at the tip of the pin 2' and a built-in heater 4' is in its inside. The pin 2' is made so as to come in and out in the sprue 1' by a driving part 5' and further it is constructed so as to compress a lens cavity 9' by compression force generated by a cavity compression cylinder 10'. After the resin is filled into a lens cavity of the mold constructed in this way via the sprue 1' and the runner 6', the pin 2' proceeds into the sprue 1' in proper time by the pin driving cylinder 5' and melts the resin near the tip by the built-in heater 4', then the path is closed and the resin backflow is prevented.
JP14696880A 1980-10-22 1980-10-22 Resin backflow preventing mechanism of mold Pending JPS5770626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14696880A JPS5770626A (en) 1980-10-22 1980-10-22 Resin backflow preventing mechanism of mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14696880A JPS5770626A (en) 1980-10-22 1980-10-22 Resin backflow preventing mechanism of mold

Publications (1)

Publication Number Publication Date
JPS5770626A true JPS5770626A (en) 1982-05-01

Family

ID=15419644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14696880A Pending JPS5770626A (en) 1980-10-22 1980-10-22 Resin backflow preventing mechanism of mold

Country Status (1)

Country Link
JP (1) JPS5770626A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61130016A (en) * 1984-11-29 1986-06-17 Aida Eng Ltd Method of injection molding
JPH01275111A (en) * 1988-04-28 1989-11-02 Aida Eng Ltd Attaching and detaching of injection mold and its insert
EP1225024A2 (en) * 1995-12-04 2002-07-24 Hoya Corporation Injection compression molding method of a spectacle lens
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61130016A (en) * 1984-11-29 1986-06-17 Aida Eng Ltd Method of injection molding
JPH01275111A (en) * 1988-04-28 1989-11-02 Aida Eng Ltd Attaching and detaching of injection mold and its insert
JPH0544893B2 (en) * 1988-04-28 1993-07-07 Aida Eng Ltd
EP1225024A2 (en) * 1995-12-04 2002-07-24 Hoya Corporation Injection compression molding method of a spectacle lens
EP1225024A3 (en) * 1995-12-04 2003-01-02 Hoya Corporation Injection compression molding method of a spectacle lens
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
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
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

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