JPS5775840A - Injection molding method causing liquid reaction - Google Patents

Injection molding method causing liquid reaction

Info

Publication number
JPS5775840A
JPS5775840A JP55152090A JP15209080A JPS5775840A JP S5775840 A JPS5775840 A JP S5775840A JP 55152090 A JP55152090 A JP 55152090A JP 15209080 A JP15209080 A JP 15209080A JP S5775840 A JPS5775840 A JP S5775840A
Authority
JP
Japan
Prior art keywords
gas
piston
liquid raw
raw materials
cavity
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
JP55152090A
Other languages
Japanese (ja)
Inventor
Yasuo Hiyoshi
Tokio Isogai
Aizo Kaneda
Ataru Yokono
Masao Goto
Masayoshi Aoki
Susumu Tsujiku
Kenichi Waratani
Makoto Iida
Shozo Nakamura
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 JP55152090A priority Critical patent/JPS5775840A/en
Publication of JPS5775840A publication Critical patent/JPS5775840A/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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7615—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components
    • B29B7/7621—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components involving introducing a gas or another component in at least one of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • 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)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To reliably and inexpensively mold foamed product with no defects in its external appearance and internal structure by a method wherein plural kinds of liquids raw waterials are poured into a mold cavity and then gas is introduced under pressure to expand and curefy, in an injection molding method causing a liquid reaction. CONSTITUTION:A mixing head 8 provided with a gas supply port 16 and a gas exhaust port 17 is employed. With a piston 15 located on the right side, liquid raw materials A, B flow into the head through right pipes, pass through passages formed in the piston 15 and then discharged therefrom through left pipes, thus circulated separately. When working oil 12 is sucked to move the piston 15 leftward, the liquid raw materials A, B are mixed with each other. Subsequest movement of the piston 15 in the rightward direction causes a predetermined amount of the mixed liquid raw material to be fed into a mold cavity. Thereafter, a valve for the gas supply port 16 is opened to introduce gas 18 into the cavity, so that the mixed liquid raw materials are formed and solidified while filling up the cavity. Then, a valve for the gas exhaust port 17 is opened to discharge the excess of the gas 18, so that solidification is completed and foamed products are obtained.
JP55152090A 1980-10-31 1980-10-31 Injection molding method causing liquid reaction Pending JPS5775840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55152090A JPS5775840A (en) 1980-10-31 1980-10-31 Injection molding method causing liquid reaction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55152090A JPS5775840A (en) 1980-10-31 1980-10-31 Injection molding method causing liquid reaction

Publications (1)

Publication Number Publication Date
JPS5775840A true JPS5775840A (en) 1982-05-12

Family

ID=15532823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55152090A Pending JPS5775840A (en) 1980-10-31 1980-10-31 Injection molding method causing liquid reaction

Country Status (1)

Country Link
JP (1) JPS5775840A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976331U (en) * 1982-11-16 1984-05-23 株式会社新潟鐵工所 reaction injection molding equipment
JPS59158235A (en) * 1983-02-28 1984-09-07 Nisshinbo Ind Inc Preparation of polyurethane molded article in mold of which at least one surface is formed of concrete
JPS6232007A (en) * 1985-08-02 1987-02-12 Ube Ind Ltd Reactive injection molding method
CN103391836A (en) * 2011-07-26 2013-11-13 三樱工业株式会社 Method and device for producing pipe member

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976331U (en) * 1982-11-16 1984-05-23 株式会社新潟鐵工所 reaction injection molding equipment
JPS59158235A (en) * 1983-02-28 1984-09-07 Nisshinbo Ind Inc Preparation of polyurethane molded article in mold of which at least one surface is formed of concrete
JPH0333495B2 (en) * 1983-02-28 1991-05-17 Nitsushin Boseki Kk
JPS6232007A (en) * 1985-08-02 1987-02-12 Ube Ind Ltd Reactive injection molding method
JPH0374889B2 (en) * 1985-08-02 1991-11-28
CN103391836A (en) * 2011-07-26 2013-11-13 三樱工业株式会社 Method and device for producing pipe member
CN103391836B (en) * 2011-07-26 2017-03-15 三樱工业株式会社 The manufacture method and manufacture device of duct member

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