JPH0238017A - Gate structure of molding metal mold - Google Patents

Gate structure of molding metal mold

Info

Publication number
JPH0238017A
JPH0238017A JP18869888A JP18869888A JPH0238017A JP H0238017 A JPH0238017 A JP H0238017A JP 18869888 A JP18869888 A JP 18869888A JP 18869888 A JP18869888 A JP 18869888A JP H0238017 A JPH0238017 A JP H0238017A
Authority
JP
Japan
Prior art keywords
gate
pushing pin
mold
molding
tapered
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
JP18869888A
Other languages
Japanese (ja)
Other versions
JPH0617046B2 (en
Inventor
Katsumi Takahashi
Original Assignee
Toyoda Gosei 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 Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP63188698A priority Critical patent/JPH0617046B2/en
Publication of JPH0238017A publication Critical patent/JPH0238017A/en
Publication of JPH0617046B2 publication Critical patent/JPH0617046B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B29C45/27Sprue channels Runner channels or runner nozzles
    • B29C45/2701Details not specific to hot or cold runner channels
    • B29C45/2708Gates
    • B29C2045/2709Gates with a plurality of mould cavity inlets in close proximity

Abstract

PURPOSE: To cut a gate portion with making use of the motion of a pushing pin by forming a mold surface defining one surface of a gate cavity of a first mold into a tapered shape inclined for a direction of the motion of said pushing pin and deforming said gate portion in sliding movement against said tapered surface when said pushing pin is driven.
CONSTITUTION: When a pushing pin 5 is driven to proceed within a moving hole 50, an end portion 121 of a main runner 120 is pressed thereby to project a molding body 130 and a molding gate portion outside a movable mold 2. At this time, since the movable mold 2 has a tapered surface 20 inclined for the direction of movement of the pushing pin 5, a stress acts on the two gate portions 240 in a direction that the two gate portions are brought closer to each other. When the mold is released, since the gate portion is high in temperature and therefore easy to deform, a sub-runner 400 is deformed to narrow the width of a channel portion 401. Accordingly, the stress of the deformation is concentrated on a boundary between the gate portion 240 and the molding body 130, so that the gate portion 240 can be cut at the boundary.
COPYRIGHT: (C)1990,JPO&Japio
JP63188698A 1988-07-28 1988-07-28 Gate structure of molding die Expired - Lifetime JPH0617046B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63188698A JPH0617046B2 (en) 1988-07-28 1988-07-28 Gate structure of molding die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63188698A JPH0617046B2 (en) 1988-07-28 1988-07-28 Gate structure of molding die

Publications (2)

Publication Number Publication Date
JPH0238017A true JPH0238017A (en) 1990-02-07
JPH0617046B2 JPH0617046B2 (en) 1994-03-09

Family

ID=16228255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63188698A Expired - Lifetime JPH0617046B2 (en) 1988-07-28 1988-07-28 Gate structure of molding die

Country Status (1)

Country Link
JP (1) JPH0617046B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189950B1 (en) 1997-10-29 2001-02-20 Nishikawa Rubber Co., Ltd. Sealing structure for a convertible
US8230696B2 (en) 2006-09-26 2012-07-31 Hoshizaki Denki Kabushiki Kaisha Device equipped with cooling mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56128222U (en) * 1980-02-29 1981-09-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56128222U (en) * 1980-02-29 1981-09-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189950B1 (en) 1997-10-29 2001-02-20 Nishikawa Rubber Co., Ltd. Sealing structure for a convertible
US8230696B2 (en) 2006-09-26 2012-07-31 Hoshizaki Denki Kabushiki Kaisha Device equipped with cooling mechanism

Also Published As

Publication number Publication date
JPH0617046B2 (en) 1994-03-09

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