JPS57165235A - Mold for injection molding - Google Patents

Mold for injection molding

Info

Publication number
JPS57165235A
JPS57165235A JP5053781A JP5053781A JPS57165235A JP S57165235 A JPS57165235 A JP S57165235A JP 5053781 A JP5053781 A JP 5053781A JP 5053781 A JP5053781 A JP 5053781A JP S57165235 A JPS57165235 A JP S57165235A
Authority
JP
Japan
Prior art keywords
mold
molding
injection
cavity
molding material
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
JP5053781A
Other languages
Japanese (ja)
Inventor
Masatsune Ogura
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.)
Chemours Mitsui Fluoroproducts Co Ltd
Original Assignee
Du Pont Mitsui Fluorochemicals Co Ltd
Mitsui Fluorochemicals 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 Du Pont Mitsui Fluorochemicals Co Ltd, Mitsui Fluorochemicals Co Ltd filed Critical Du Pont Mitsui Fluorochemicals Co Ltd
Priority to JP5053781A priority Critical patent/JPS57165235A/en
Publication of JPS57165235A publication Critical patent/JPS57165235A/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
    • B29C45/26—Moulds
    • B29C45/34—Moulds having venting means
    • B29C45/345—Moulds having venting means using a porous mould wall or a part thereof, e.g. made of sintered metal

Landscapes

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

Abstract

PURPOSE:To provide an injection-molding mold which prevents the occurrence of an imperfect molding, such as short shot, burrs, by a method wherein a given polytetrafluoroethylene continuous porous sheet member is placed in a parting line of a mold. CONSTITUTION:A polytetrafluoroethylene continuous porous seal member 4 (an appartant specific gravity; about 1-2, an air permeation resistance; 0.1-2) of a non-fibril structure is placed in a parting line of an injection-molding mold consisting of a female mold 1 and male mold 2. Thus, if a melted resin molding material is injected into a cavity 3 through a runner 6 and a gate 7, air, occupying an space in the cavity 3, and gas produced from the molding material are extruded to the outside of the mold through vent recesses 5, and with this the molding material is injection-molded into the cavity 3 in the excellent condition.
JP5053781A 1981-04-06 1981-04-06 Mold for injection molding Pending JPS57165235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5053781A JPS57165235A (en) 1981-04-06 1981-04-06 Mold for injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5053781A JPS57165235A (en) 1981-04-06 1981-04-06 Mold for injection molding

Publications (1)

Publication Number Publication Date
JPS57165235A true JPS57165235A (en) 1982-10-12

Family

ID=12861750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5053781A Pending JPS57165235A (en) 1981-04-06 1981-04-06 Mold for injection molding

Country Status (1)

Country Link
JP (1) JPS57165235A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825315A1 (en) * 2001-06-05 2002-12-06 Inoac Packaging Group Inc MOLDING SYSTEM AND RELATED METHOD USING A VACUUM ASSISTED SIDE ENTRY INJECTION MOLD AND RESULTING BLOW MOLDED ARTICLE
CN103987507A (en) * 2011-11-24 2014-08-13 铃木株式会社 Molding die and molding method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825315A1 (en) * 2001-06-05 2002-12-06 Inoac Packaging Group Inc MOLDING SYSTEM AND RELATED METHOD USING A VACUUM ASSISTED SIDE ENTRY INJECTION MOLD AND RESULTING BLOW MOLDED ARTICLE
CN103987507A (en) * 2011-11-24 2014-08-13 铃木株式会社 Molding die and molding method

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