JPS5787340A - Injection unit for injection molding machine - Google Patents

Injection unit for injection molding machine

Info

Publication number
JPS5787340A
JPS5787340A JP16350380A JP16350380A JPS5787340A JP S5787340 A JPS5787340 A JP S5787340A JP 16350380 A JP16350380 A JP 16350380A JP 16350380 A JP16350380 A JP 16350380A JP S5787340 A JPS5787340 A JP S5787340A
Authority
JP
Japan
Prior art keywords
screw
gap section
valve
plunger
passage
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
JP16350380A
Other languages
Japanese (ja)
Inventor
Hiroshi Kumazaki
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 JP16350380A priority Critical patent/JPS5787340A/en
Publication of JPS5787340A publication Critical patent/JPS5787340A/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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
    • 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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
    • B29C2045/548—Reciprocating plasticising screws

Landscapes

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

Abstract

PURPOSE:An ultra-high-speed injection unit which is designted to accumulate a prescribed volume of plastic materials, ejected from an in-line screw type injecting device, in a forward gap section of an ejection plunger in an injection cylinder and move the plunger forward into a metallic mold cavity. CONSTITUTION:Shut-off valves 15 and 19 are closed and resin material which is put in from a hopper 6 of an in-line screw device 1 is moved forward in a heating cylinder 2 by a screw 5 to be plasticized, and keeping the material accumulated in a forward gap section 2a of a screw head 5a, the screw 5a is moved back to a prescribed position. And then, an opening section 17a of the valve 15 is set to a passage 7, and by operating a hydraulic cylinder 4, the screw 5 is moved forward to shift the material in the gap section 2a to a gap section 14 and keep a plunger 10 moving backward until a hydraulic ram 11 hits a stopper 18 located on a prescribed position. During this period of time, pressure of the material in the gap section 14 is increased to a prescribed value by operating the screw 5, and the passage 7 is closed by the valve 15. Injecting operation is conducted by working directly onto the hydraulic cylinder 12 and also by connecting a nozzle 22 with a flow passage 23 by a valve 19.
JP16350380A 1980-11-20 1980-11-20 Injection unit for injection molding machine Pending JPS5787340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16350380A JPS5787340A (en) 1980-11-20 1980-11-20 Injection unit for injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16350380A JPS5787340A (en) 1980-11-20 1980-11-20 Injection unit for injection molding machine

Publications (1)

Publication Number Publication Date
JPS5787340A true JPS5787340A (en) 1982-05-31

Family

ID=15775094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16350380A Pending JPS5787340A (en) 1980-11-20 1980-11-20 Injection unit for injection molding machine

Country Status (1)

Country Link
JP (1) JPS5787340A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59166921U (en) * 1983-04-23 1984-11-08 豊田合成株式会社 Screw type injection machine
JPS60219025A (en) * 1984-04-13 1985-11-01 Nippon Benchiyaazu:Kk Plunger-type injection molding device
US4592721A (en) * 1982-09-23 1986-06-03 Northern Telecom Limited Apparatus for sealably encapsulating articles
US5030080A (en) * 1988-04-11 1991-07-09 Kabushiki Kaisha Kobe Seiko Sho Resin material supply apparatus to resin press molding machine
US5380187A (en) * 1992-02-21 1995-01-10 Sodick Co., Ltd. Pre-plasticization type injection molding machine
EP0868988A1 (en) * 1997-04-02 1998-10-07 Tohkai Juken Kogyo Kabushiki Kaisha Injection molding machine for thermoplastic resin
US5861182A (en) * 1994-03-18 1999-01-19 Nissei Plastic Industrial Co., Ltd. Preplasticizing injection apparatus
WO2000006359A1 (en) * 1998-07-31 2000-02-10 Lomold (Pty) Ltd Moulding apparatus and method of moulding
KR100322860B1 (en) * 1997-04-09 2002-07-08 노리쓰기 세끼도 Injection molding machine for thermoplastic resin
EP1321275A2 (en) 1998-12-25 2003-06-25 Murata Manufacturing Co., Ltd. Thermoplastic resin injection molding machine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592721A (en) * 1982-09-23 1986-06-03 Northern Telecom Limited Apparatus for sealably encapsulating articles
JPS59166921U (en) * 1983-04-23 1984-11-08 豊田合成株式会社 Screw type injection machine
JPS60219025A (en) * 1984-04-13 1985-11-01 Nippon Benchiyaazu:Kk Plunger-type injection molding device
US5030080A (en) * 1988-04-11 1991-07-09 Kabushiki Kaisha Kobe Seiko Sho Resin material supply apparatus to resin press molding machine
US5380187A (en) * 1992-02-21 1995-01-10 Sodick Co., Ltd. Pre-plasticization type injection molding machine
US5861182A (en) * 1994-03-18 1999-01-19 Nissei Plastic Industrial Co., Ltd. Preplasticizing injection apparatus
EP0868988A1 (en) * 1997-04-02 1998-10-07 Tohkai Juken Kogyo Kabushiki Kaisha Injection molding machine for thermoplastic resin
KR100322860B1 (en) * 1997-04-09 2002-07-08 노리쓰기 세끼도 Injection molding machine for thermoplastic resin
WO2000006359A1 (en) * 1998-07-31 2000-02-10 Lomold (Pty) Ltd Moulding apparatus and method of moulding
EP1321275A2 (en) 1998-12-25 2003-06-25 Murata Manufacturing Co., Ltd. Thermoplastic resin injection molding machine
EP1321275A3 (en) * 1998-12-25 2003-08-13 Murata Manufacturing Co., Ltd. Thermoplastic resin injection molding machine
US6824374B1 (en) 1998-12-25 2004-11-30 Murata Manufacturing Co., Ltd. Thermoplastic resin injection molding machine
US7090481B2 (en) 1998-12-25 2006-08-15 Murata Manufacturing Co., Ltd. Thermoplastic resin injection molding machine

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