JPS55140532A - Foamed forming method - Google Patents

Foamed forming method

Info

Publication number
JPS55140532A
JPS55140532A JP5041379A JP5041379A JPS55140532A JP S55140532 A JPS55140532 A JP S55140532A JP 5041379 A JP5041379 A JP 5041379A JP 5041379 A JP5041379 A JP 5041379A JP S55140532 A JPS55140532 A JP S55140532A
Authority
JP
Japan
Prior art keywords
steam
grains
mold
foamed
preliminarily
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
JP5041379A
Other languages
Japanese (ja)
Inventor
Takashi Kamimura
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.)
Sekisui Kasei Co Ltd
Original Assignee
Sekisui Plastics 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 Sekisui Plastics Co Ltd filed Critical Sekisui Plastics Co Ltd
Priority to JP5041379A priority Critical patent/JPS55140532A/en
Publication of JPS55140532A publication Critical patent/JPS55140532A/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
    • B29C44/36—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
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • 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
    • B29C44/3426—Heating by introducing steam in the mould

Landscapes

  • Molding Of Porous Articles (AREA)

Abstract

PURPOSE:To enable the omission of preheating process of a metal mold and thereby raise the production efficiency by injecting steam when preliminarily-foamed grains with high heat-resisting property are filled in a mold pit. CONSTITUTION:On the occasion when foamed grains obtained by foaming preliminarily thermoplastic resin grains with foaming property are filled in a mold pit 3 of a forming mold and heated by some heating medium such as steam to be expanded and formed, perliminarily-foamed grains with excellent heat-resisting property (suitably, copolymer of sytrene and maleic anhudride or the blended material of the copolymer with any other thermoplastic resins) are filled in the mold pit 3 from a material inlet port 4 by a filler 4 and simultaneously the steam is injected therein from a boost nozzle 42. The foaming itself is expedited only slightly even with the simultaneous injection of preliminarily-foamed grains with so higher heat-resisting property as 20-25 deg.C than that of the polystyrene used so far and steam, while the time required for heating is shortened sharply because the air among the grains is expelled from the mold pit 3 by the steam.
JP5041379A 1979-04-23 1979-04-23 Foamed forming method Pending JPS55140532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5041379A JPS55140532A (en) 1979-04-23 1979-04-23 Foamed forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5041379A JPS55140532A (en) 1979-04-23 1979-04-23 Foamed forming method

Publications (1)

Publication Number Publication Date
JPS55140532A true JPS55140532A (en) 1980-11-04

Family

ID=12858165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5041379A Pending JPS55140532A (en) 1979-04-23 1979-04-23 Foamed forming method

Country Status (1)

Country Link
JP (1) JPS55140532A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055740U (en) * 1991-07-11 1993-01-26 アンリツ株式会社 Goods supply equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055740U (en) * 1991-07-11 1993-01-26 アンリツ株式会社 Goods supply equipment

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