JPS57123017A - Molding method - Google Patents

Molding method

Info

Publication number
JPS57123017A
JPS57123017A JP13194580A JP13194580A JPS57123017A JP S57123017 A JPS57123017 A JP S57123017A JP 13194580 A JP13194580 A JP 13194580A JP 13194580 A JP13194580 A JP 13194580A JP S57123017 A JPS57123017 A JP S57123017A
Authority
JP
Japan
Prior art keywords
molding
molding cores
cores
movable mold
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
JP13194580A
Other languages
Japanese (ja)
Inventor
Akira Aihara
Kiyokazu Shibusawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13194580A priority Critical patent/JPS57123017A/en
Publication of JPS57123017A publication Critical patent/JPS57123017A/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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • 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

Landscapes

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

Abstract

PURPOSE:To obtain a highly accurate product such as a screw, a product having an undercut, etc. without being deformed or having strain due to the molding, by alternatively arranging molding cores of a stationary mold and a movable mold, and moving diametrically the molding cores with a time lag when the molds are released. CONSTITUTION:The movable mold 18 having the molding cores 23, 23 that can move in the direction of their inner diameter and the movable mold 13 having the molding cores 15, 15 that can move in the direction of their inner diameter define a cavity for forming an item 40 having for example an undercut. The molding cores of the movable mold and the molding cores of the stationaly mold are alternatively arranged to form a prescribed molding space. When the molds are released, the molding cores of the movable mold and the molding cores of the stationary mold are moved separately with respect to time from the molded item, and thereby an excessive force would not be exerted on the item so that a highly accurate product having an internal thread, undercut, notch or the like can be obtained without being deformed or strained by molding.
JP13194580A 1980-09-22 1980-09-22 Molding method Pending JPS57123017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13194580A JPS57123017A (en) 1980-09-22 1980-09-22 Molding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13194580A JPS57123017A (en) 1980-09-22 1980-09-22 Molding method

Publications (1)

Publication Number Publication Date
JPS57123017A true JPS57123017A (en) 1982-07-31

Family

ID=15069876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13194580A Pending JPS57123017A (en) 1980-09-22 1980-09-22 Molding method

Country Status (1)

Country Link
JP (1) JPS57123017A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502659A (en) * 1983-12-21 1985-03-05 General Motors Corporation Collet-containing mold for undercut molding
US5925303A (en) * 1995-02-09 1999-07-20 Unique Mould Makers Limited Process for forming seamless molded skirt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502659A (en) * 1983-12-21 1985-03-05 General Motors Corporation Collet-containing mold for undercut molding
US5925303A (en) * 1995-02-09 1999-07-20 Unique Mould Makers Limited Process for forming seamless molded skirt

Similar Documents

Publication Publication Date Title
GB994017A (en) Dies, and method and apparatus for making them
AU3205384A (en) Die casting an internally screw threaded article
JPS5546938A (en) System for simultaneously making mould of different kind of material
JPS57123017A (en) Molding method
GB1085772A (en) Method of and apparatus for injection moulding of hardenable plastics material
GB1320928A (en) Moulds for parts of plastics material
JPS57203512A (en) Stripping method and apparatus for synthetic resin molding with undercut section
JPS5774137A (en) Method and device for three dimensional decoration forming, and product thereby
JPS57156231A (en) Split core of mold for injection molding
JPS532899A (en) Process for producing composite material wing
JPS5686730A (en) Method and device for preparation of molded article
JPS5610438A (en) Forming mold
JPS53143665A (en) Manufacture of patterned plastic molded article
JPS57205120A (en) Molding of aspherical lens
JPS53137259A (en) Forming composite vessel and mold for the same
JPS56126142A (en) Automatic coating method for ornamental plate for plastic resin injection-molded product and coating mold thereof and product coated by use of said mold
JPS5596793A (en) Production of diaphragm for speaker
JPS55137934A (en) Molding apparatus
JPS57148634A (en) Automatic mold tightening force set-up for toggle type injection molding machine
SU852592A1 (en) Casting mould for producing tubular article
SU403565A1 (en) CASTING FORM FOR THE MANUFACTURE OF PLASTIC PRODUCTS WITH UNDERWATER
SU626960A1 (en) Mould for manufacturing articles from polymer materials by pressure moulding
JPS571710A (en) Mold for molding synthetic resin product
JPS5670929A (en) Molding of long-sized product having fancy film along convexes and concaves on surface thereof
GB1246774A (en) A molding method and mold therefor