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JPS56123845A - Manufacturing method for injection molded product - Google Patents

Manufacturing method for injection molded product

Info

Publication number
JPS56123845A
JPS56123845A JP2761280A JP2761280A JPS56123845A JP S56123845 A JPS56123845 A JP S56123845A JP 2761280 A JP2761280 A JP 2761280A JP 2761280 A JP2761280 A JP 2761280A JP S56123845 A JPS56123845 A JP S56123845A
Authority
JP
Japan
Prior art keywords
core
injection molded
alloy
melting point
metal mold
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
JP2761280A
Other languages
Japanese (ja)
Inventor
Takashi Mori
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.)
C-CHIYOO KOGYO KK
SEECHIYOO KOGYO KK
Original Assignee
C-CHIYOO KOGYO KK
SEECHIYOO KOGYO KK
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 C-CHIYOO KOGYO KK, SEECHIYOO KOGYO KK filed Critical C-CHIYOO KOGYO KK
Priority to JP2761280A priority Critical patent/JPS56123845A/en
Publication of JPS56123845A publication Critical patent/JPS56123845A/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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores

Landscapes

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

Abstract

PURPOSE:To facilitate the taking-out operation of the injection molded products having undercut parts, by making use of a core made of alloy with lower melting point. CONSTITUTION:A core is made of an alloy of bismuth and tin with a melting point at 136 C. This core is mounted to a stationary metal mold by the fittings 4. After the stationary metal mold 1 and a movable metal mold 2 are fixed, the molten propylene resins are injected, through a spool 5 and a runner 6, to obtain a injection molded bottle. Then after the molds 1, 2 are opened, the molded product 7 is taken out along with the core 3 by means of a knockout pin 9. With heating applied thereto, the alloy with lower melting point in the shaped product 7 is melted and removed.
JP2761280A 1980-03-05 1980-03-05 Manufacturing method for injection molded product Pending JPS56123845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2761280A JPS56123845A (en) 1980-03-05 1980-03-05 Manufacturing method for injection molded product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2761280A JPS56123845A (en) 1980-03-05 1980-03-05 Manufacturing method for injection molded product

Publications (1)

Publication Number Publication Date
JPS56123845A true JPS56123845A (en) 1981-09-29

Family

ID=12225749

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2761280A Pending JPS56123845A (en) 1980-03-05 1980-03-05 Manufacturing method for injection molded product

Country Status (1)

Country Link
JP (1) JPS56123845A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212921A (en) * 1982-06-04 1983-12-10 Aron Kasei Co Ltd Molding method of plastic hollow product
JPS6013518A (en) * 1983-07-04 1985-01-24 Daiwa Giken:Kk Molding process of undercut product
JPS63231921A (en) * 1987-03-20 1988-09-28 Nok Corp Manufacture of stator
WO1989011551A1 (en) * 1988-05-23 1989-11-30 Yoon Technology Fabrication of fusible core alloy composites for plastics molding
JPH0250814A (en) * 1988-08-15 1990-02-20 Ebara Corp Resin mold method employing low melting alloy core and core mold article used for method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212921A (en) * 1982-06-04 1983-12-10 Aron Kasei Co Ltd Molding method of plastic hollow product
JPH0155082B2 (en) * 1982-06-04 1989-11-22 Aron Kasei Kk
JPS6013518A (en) * 1983-07-04 1985-01-24 Daiwa Giken:Kk Molding process of undercut product
JPH0119327B2 (en) * 1983-07-04 1989-04-11 Daiwa Giken Kk
JPS63231921A (en) * 1987-03-20 1988-09-28 Nok Corp Manufacture of stator
US4927712A (en) * 1988-04-27 1990-05-22 Yoon Technology Fusible core alloy composites for plastics molding
US4962003A (en) * 1988-04-27 1990-10-09 Lhymn Yoon O Development of fusible alloy composites
WO1989011551A1 (en) * 1988-05-23 1989-11-30 Yoon Technology Fabrication of fusible core alloy composites for plastics molding
JPH0250814A (en) * 1988-08-15 1990-02-20 Ebara Corp Resin mold method employing low melting alloy core and core mold article used for method thereof
JPH0513808B2 (en) * 1988-08-15 1993-02-23 Ebara Mfg

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