JPS57170727A - Manufacture of foam molded part - Google Patents

Manufacture of foam molded part

Info

Publication number
JPS57170727A
JPS57170727A JP56057515A JP5751581A JPS57170727A JP S57170727 A JPS57170727 A JP S57170727A JP 56057515 A JP56057515 A JP 56057515A JP 5751581 A JP5751581 A JP 5751581A JP S57170727 A JPS57170727 A JP S57170727A
Authority
JP
Japan
Prior art keywords
gas
molds
high frequency
foaming agent
frequency voltage
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
JP56057515A
Other languages
Japanese (ja)
Inventor
Hiromitsu Matsuda
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.)
Inoac Corp
Original Assignee
Inoue MTP KK
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 Inoue MTP KK filed Critical Inoue MTP KK
Priority to JP56057515A priority Critical patent/JPS57170727A/en
Publication of JPS57170727A publication Critical patent/JPS57170727A/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
    • 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
    • B29C44/3415—Heating or cooling
    • 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
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/06—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using radiation, e.g. electro-magnetic waves, induction heating

Abstract

PURPOSE:To manufacture a foam molded part easily and efficiently by a method wherein a plastic material containing chemical foaming agent is laid in a cavity of a mold, and softned, melted and expanded by an applied high frequency voltage. CONSTITUTION:A plastic material R containing chemical foaming agent that produces gas by thermal decomposition is laid in a cavity 13 and then molds 11, 12 are closed. Subsequently, a high frequency voltage is applied to facing upper and lower electrodes 21, 22, the material R is self-heated, softened and melted by its own dielectric loss and the foaming agent is decomposed thermally to produce gas. The material R is expanded by this decomposed gas, cavities 13, 14 are filled with the gas, and a desired foam is made. Next, the application of the high frequency voltage is stopped, cooling water is passed through cooling pipes 16, 16... to cool the molds 11, 12 and the molds are opened to take out a product.
JP56057515A 1981-04-16 1981-04-16 Manufacture of foam molded part Pending JPS57170727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56057515A JPS57170727A (en) 1981-04-16 1981-04-16 Manufacture of foam molded part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057515A JPS57170727A (en) 1981-04-16 1981-04-16 Manufacture of foam molded part

Publications (1)

Publication Number Publication Date
JPS57170727A true JPS57170727A (en) 1982-10-21

Family

ID=13057867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057515A Pending JPS57170727A (en) 1981-04-16 1981-04-16 Manufacture of foam molded part

Country Status (1)

Country Link
JP (1) JPS57170727A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108110A (en) * 1981-12-22 1983-06-28 Aisin Seiki Co Ltd Thermoplastic resin molding and manufacture thereof
FR2602176A1 (en) * 1986-07-30 1988-02-05 Inoue Mtp Kk PROCESS FOR PRODUCING PLASTIC FOAM BY DIELECTRIC HEATING
WO2013050581A1 (en) * 2011-10-06 2013-04-11 Jsp International Sarl Moulding of plastic particulate matter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388063A (en) * 1977-01-14 1978-08-03 Nagano Denzai Kk Production of foamed plastic molded article

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388063A (en) * 1977-01-14 1978-08-03 Nagano Denzai Kk Production of foamed plastic molded article

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108110A (en) * 1981-12-22 1983-06-28 Aisin Seiki Co Ltd Thermoplastic resin molding and manufacture thereof
JPH0120980B2 (en) * 1981-12-22 1989-04-19 Aisin Seiki
FR2602176A1 (en) * 1986-07-30 1988-02-05 Inoue Mtp Kk PROCESS FOR PRODUCING PLASTIC FOAM BY DIELECTRIC HEATING
US4824617A (en) * 1986-07-30 1989-04-25 Inoue Mtp Kabushiki Kaisha Method for manufacturing plastic foam
WO2013050581A1 (en) * 2011-10-06 2013-04-11 Jsp International Sarl Moulding of plastic particulate matter

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