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
Grant status
Application
Patent type
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.)
Granted
Application number
JP5053781A
Inventor
Masatsune Ogura
Original Assignee
Du Pont Mitsui Fluorochem 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/34Moulds having venting means
    • B29C45/345Moulds having venting means using a porous mould wall or a part thereof, e.g. made of sintered metal

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 Granted 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 true JPS57165235A (en) 1982-10-12

Family

ID=12861750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5053781A Granted 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 method using a mold in relation to the injection lateral entry with assistance of vacuum and blow-molded article resulting
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 method using a mold in relation to the injection lateral entry with assistance of vacuum and blow-molded article resulting
CN103987507A (en) * 2011-11-24 2014-08-13 铃木株式会社 Molding die and molding method

Similar Documents

Publication Publication Date Title
FR2256021A1 (en) Moulded hollow (foamed) plastic articles - by injecting molten resin into moulding cavity, and introducing filling of fluid medium
JPH0376624A (en) Injection molding of container, injection molding apparatus for container and container
JPS5628831A (en) Manufacturing of hollow molded article with insert
JPS61202827A (en) Manufacture of hollow resin molding
DE2513594A1 (en) Mould for prodn. of sprue flash-free mouldings - from propellant contg. thermoplastics, with three movable mould platens
JPS63249616A (en) Method for molding resin
JPS5829618A (en) Method of joining molded ring to brim of paper cup
DE3446020A1 (en) Process for producing injection moulded parts from plastic
JPS571737A (en) Manufacture of weather strip
JPH04144723A (en) Manufacture of fiber-reinforced resin molded form
JPS6176333A (en) Jointing method among molded articles by injection molding
JPS63239011A (en) Parison for biaxial stretch-blow molding and molding method therefor
JPS5630841A (en) Plastic molding method and metallic mold therefor
JPS62108019A (en) Method and apparatus for molding multi-color synthetic resin molding and product thereof
DE3039796A1 (en) Composite thermoplastic injection mouldings prodn. - by injecting first polymer and enlarging cavity for injecting second polymer on it
JPS5651333A (en) Manufacture of hollow molding with insert
JPS60250927A (en) Manufacture of synthetic resin molding excellent in haze prevention performance
JPS5789944A (en) Molding method
JPS56159134A (en) Mold for injection molding
JPS595035A (en) Manufacture of composite layer hollow molded object
JPS60247520A (en) Molding method of hinge in synthetic-resin molded article
JPS6129516A (en) Method and apparatus for manufacturing synthetic resin composite molded shape
JPS6189824A (en) Manufacture of plastic fuel tank
JPH0462119A (en) Preparation of resin molding with electrically conductive layer
JPH03293107A (en) Manufacture of optical disc and mold therefor