JPS5772840A - Mold for reactive injection molding - Google Patents

Mold for reactive injection molding

Info

Publication number
JPS5772840A
JPS5772840A JP55148890A JP14889080A JPS5772840A JP S5772840 A JPS5772840 A JP S5772840A JP 55148890 A JP55148890 A JP 55148890A JP 14889080 A JP14889080 A JP 14889080A JP S5772840 A JPS5772840 A JP S5772840A
Authority
JP
Japan
Prior art keywords
gate
bar
mold cavity
auxiliary gate
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.)
Granted
Application number
JP55148890A
Other languages
Japanese (ja)
Other versions
JPS617929B2 (en
Inventor
Kenichi Waratani
Shozo Nakamura
Masao Goto
Ataru Yokono
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55148890A priority Critical patent/JPS5772840A/en
Publication of JPS5772840A publication Critical patent/JPS5772840A/en
Publication of JPS617929B2 publication Critical patent/JPS617929B2/ja
Granted 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
    • B29C33/0061—Moulds or cores; Details thereof or accessories therefor characterised by the configuration of the material feeding channel
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]

Abstract

PURPOSE:To facilitate and simplify alteration of a gate shape or a gate size for improving molding inferiority of attaching a replaceable bar for an auxiliary gate to an auxiliary gate part provided between a gate and a mold cavity. CONSTITUTION:A groove type auxiliary gate is provided between a gate 9 and a mold cavity 11 and a bar 6 for an auxiliary gate with an appropriate cross area shape is attached to said ausiliary gate part 10 by a screw 6c. When a step part is present in the mold cavity, the bar (shallow at 6a and deep at 6b) for the auxiliary gate having a step part corresponding to that of said mold cavity may be used. When non-filling of a resin or the like, so called molding inferiority is generated, it is not necessary to exchange a metal mold entirely and, because only a shape and a size of the bar 6 for the auxiliary gate is altered, molding inferiority can be easily improved.
JP55148890A 1980-10-25 1980-10-25 Mold for reactive injection molding Granted JPS5772840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55148890A JPS5772840A (en) 1980-10-25 1980-10-25 Mold for reactive injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55148890A JPS5772840A (en) 1980-10-25 1980-10-25 Mold for reactive injection molding

Publications (2)

Publication Number Publication Date
JPS5772840A true JPS5772840A (en) 1982-05-07
JPS617929B2 JPS617929B2 (en) 1986-03-10

Family

ID=15462983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55148890A Granted JPS5772840A (en) 1980-10-25 1980-10-25 Mold for reactive injection molding

Country Status (1)

Country Link
JP (1) JPS5772840A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781879A (en) * 1985-11-19 1988-11-01 Fuji Photo Film Co., Ltd. Method of making a magnetic recording disk
JPH01221216A (en) * 1988-03-01 1989-09-04 Ebara Corp Resin injection molding device
JPH01253416A (en) * 1988-04-01 1989-10-09 Ebara Corp Resin injection molding apparatus
US7661947B2 (en) * 2005-11-21 2010-02-16 Epoch Composite Products, Inc. Method and apparatus for molding roofing products with back gating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781879A (en) * 1985-11-19 1988-11-01 Fuji Photo Film Co., Ltd. Method of making a magnetic recording disk
JPH01221216A (en) * 1988-03-01 1989-09-04 Ebara Corp Resin injection molding device
JPH01253416A (en) * 1988-04-01 1989-10-09 Ebara Corp Resin injection molding apparatus
US7661947B2 (en) * 2005-11-21 2010-02-16 Epoch Composite Products, Inc. Method and apparatus for molding roofing products with back gating
US8211350B2 (en) * 2005-11-21 2012-07-03 Tamko Building Products, Inc. Method and apparatus for molding roofing products with back gating

Also Published As

Publication number Publication date
JPS617929B2 (en) 1986-03-10

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