JPS56113440A - Operating method for screw of injection molding machine - Google Patents

Operating method for screw of injection molding machine

Info

Publication number
JPS56113440A
JPS56113440A JP1697780A JP1697780A JPS56113440A JP S56113440 A JPS56113440 A JP S56113440A JP 1697780 A JP1697780 A JP 1697780A JP 1697780 A JP1697780 A JP 1697780A JP S56113440 A JPS56113440 A JP S56113440A
Authority
JP
Japan
Prior art keywords
screw
main body
ring
resin
injection
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.)
Granted
Application number
JP1697780A
Other languages
Japanese (ja)
Other versions
JPS5947979B2 (en
Inventor
Masao Hirozawa
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine 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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP1697780A priority Critical patent/JPS5947979B2/en
Publication of JPS56113440A publication Critical patent/JPS56113440A/en
Publication of JPS5947979B2 publication Critical patent/JPS5947979B2/en
Expired 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
    • B29C45/58—Details
    • B29C45/60—Screws
    • 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
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/52—Non-return devices

Landscapes

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

Abstract

PURPOSE:To fill a constantly fixed amount of resin and mold a uniform product by a method wherein a screw head is provided with a lead screw in the same direction as a screw main body, and the screw is rotated reversely to retract a back-flow preventing ring immediately before injection. CONSTITUTION:The screw head 13 is provided with the lead screw 14 in the same direction as the screw main body 12, and the back-flow preventing ring 11 is fitted between the head 13 and the screw main body 12 in such a manner that the ring 11 can be advanced and retracted freely. When the screw is rotated reversely with reference to the rotation during a measuring step for a shoft period of time after the measuring step or immediately before the starting of injection, the resin flows backward to push the ring 11 toward the main body 12, so that and end face (b) of the ring 11 is contacted with an end face (d) of the main body 12, thereby closing a passage 15 for the resin. Accordingly, since a check valve is closed necessarily at the time of the injection step, the amount of the resin filled can be constantly fixed without variations.
JP1697780A 1980-02-14 1980-02-14 How to operate the injection molding machine screw Expired JPS5947979B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1697780A JPS5947979B2 (en) 1980-02-14 1980-02-14 How to operate the injection molding machine screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1697780A JPS5947979B2 (en) 1980-02-14 1980-02-14 How to operate the injection molding machine screw

Publications (2)

Publication Number Publication Date
JPS56113440A true JPS56113440A (en) 1981-09-07
JPS5947979B2 JPS5947979B2 (en) 1984-11-22

Family

ID=11931118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1697780A Expired JPS5947979B2 (en) 1980-02-14 1980-02-14 How to operate the injection molding machine screw

Country Status (1)

Country Link
JP (1) JPS5947979B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1825987A1 (en) * 2006-02-22 2007-08-29 Fanuc Ltd Controller of injection molding machine
US7595012B2 (en) 2006-12-26 2009-09-29 Fanuc Ltd Injection molding machine and method of adjusting control condition for reverse rotation of screw in injection molding machine
WO2015181858A1 (en) * 2014-05-30 2015-12-03 三菱重工プラスチックテクノロジー株式会社 Injection molding method, screw, and injection molding machine
US9283617B2 (en) * 2007-03-10 2016-03-15 Cool Options, Inc. Screw design and method for metal injection molding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6456162U (en) * 1987-10-02 1989-04-07

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1825987A1 (en) * 2006-02-22 2007-08-29 Fanuc Ltd Controller of injection molding machine
US7452198B2 (en) 2006-02-22 2008-11-18 Fanuc Ltd Controller of injection molding machine
US7595012B2 (en) 2006-12-26 2009-09-29 Fanuc Ltd Injection molding machine and method of adjusting control condition for reverse rotation of screw in injection molding machine
US9283617B2 (en) * 2007-03-10 2016-03-15 Cool Options, Inc. Screw design and method for metal injection molding
WO2015181858A1 (en) * 2014-05-30 2015-12-03 三菱重工プラスチックテクノロジー株式会社 Injection molding method, screw, and injection molding machine
JP5894349B1 (en) * 2014-05-30 2016-03-30 三菱重工プラスチックテクノロジー株式会社 Injection molding method, screw, and injection molding machine

Also Published As

Publication number Publication date
JPS5947979B2 (en) 1984-11-22

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