JPS5795432A - Mold structure for reaction injection molding - Google Patents

Mold structure for reaction injection molding

Info

Publication number
JPS5795432A
JPS5795432A JP17099280A JP17099280A JPS5795432A JP S5795432 A JPS5795432 A JP S5795432A JP 17099280 A JP17099280 A JP 17099280A JP 17099280 A JP17099280 A JP 17099280A JP S5795432 A JPS5795432 A JP S5795432A
Authority
JP
Japan
Prior art keywords
cavity
injection molding
gas
reaction injection
porous bodies
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
JP17099280A
Other languages
Japanese (ja)
Inventor
Shozo Nakamura
Masao Goto
Ataru Yokono
Kenichi Waratani
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 JP17099280A priority Critical patent/JPS5795432A/en
Publication of JPS5795432A publication Critical patent/JPS5795432A/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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
    • 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]

Landscapes

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

Abstract

PURPOSE:To make sure the exhaustion of gas in a cavity and manufacture RIM products without voids by inserting porous bodies that have pores communicating with outer air to suitable spots on the face of a metallic mold. CONSTITUTION:Metallic molds 2 and 3 for RIM (reaction injection molding) have at their portions where gas is liable to be trapped (for example, concave portions such as boss, rib, etc.) porous bodies 19 inserted to communicate the cavity 6 with outer air. Because gas left in the cavity 6 is completely expelled through the porous bodies 19, the products in the molds are free of voids. The porous body 19 here is made by pressing and forming metallic grains Al, Zn, etc.) of 5-50mum in diameter with a binder for them.
JP17099280A 1980-12-05 1980-12-05 Mold structure for reaction injection molding Pending JPS5795432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17099280A JPS5795432A (en) 1980-12-05 1980-12-05 Mold structure for reaction injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17099280A JPS5795432A (en) 1980-12-05 1980-12-05 Mold structure for reaction injection molding

Publications (1)

Publication Number Publication Date
JPS5795432A true JPS5795432A (en) 1982-06-14

Family

ID=15915106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17099280A Pending JPS5795432A (en) 1980-12-05 1980-12-05 Mold structure for reaction injection molding

Country Status (1)

Country Link
JP (1) JPS5795432A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179309A (en) * 1983-03-31 1984-10-11 Hitachi Metals Ltd Gas removing method of molding material and metal die therefor
JPS6237119A (en) * 1985-08-10 1987-02-18 Fujitsu Ltd Molding mold and molding method
JPS63167732U (en) * 1987-04-23 1988-11-01
JPH01221216A (en) * 1988-03-01 1989-09-04 Ebara Corp Resin injection molding device
JPH0323914A (en) * 1989-06-21 1991-01-31 Honda Motor Co Ltd Reactive injection molding method using prefoam

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179309A (en) * 1983-03-31 1984-10-11 Hitachi Metals Ltd Gas removing method of molding material and metal die therefor
JPS6237119A (en) * 1985-08-10 1987-02-18 Fujitsu Ltd Molding mold and molding method
JPS63167732U (en) * 1987-04-23 1988-11-01
JPH01221216A (en) * 1988-03-01 1989-09-04 Ebara Corp Resin injection molding device
JPH0323914A (en) * 1989-06-21 1991-01-31 Honda Motor Co Ltd Reactive injection molding method using prefoam

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