JPS56111646A - Extrusion and its device - Google Patents

Extrusion and its device

Info

Publication number
JPS56111646A
JPS56111646A JP1471880A JP1471880A JPS56111646A JP S56111646 A JPS56111646 A JP S56111646A JP 1471880 A JP1471880 A JP 1471880A JP 1471880 A JP1471880 A JP 1471880A JP S56111646 A JPS56111646 A JP S56111646A
Authority
JP
Japan
Prior art keywords
gas
mold cavity
opened
exhaust valve
resin
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
JP1471880A
Other languages
Japanese (ja)
Inventor
Akio Yasuike
Takehiro Shibuya
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.)
Asahi Dow Ltd
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Dow Ltd
Asahi Chemical Industry 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 Asahi Dow Ltd, Asahi Chemical Industry Co Ltd filed Critical Asahi Dow Ltd
Priority to JP1471880A priority Critical patent/JPS56111646A/en
Publication of JPS56111646A publication Critical patent/JPS56111646A/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
    • B29C44/42—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

Abstract

PURPOSE:To obtain a molding having a smooth and flat surface by a short shot by a method wherein a saturated vapor and a heating gas for drying are orderly induced into a mold cavity and after the wall surface is heated and dried, a pressure gas is filled therein and next thereto, a foamy resin is extruded. CONSTITUTION:First of all, a saturated vapor 6 is filled in a mold cavity 1 and a wall face thereof is heated. Next, a gas exhaust valve 5 is opened and along with this, a heating gas for drying 10 is made to flow in the mold cavity 1 to exhaust a condensed moisture. Next thereto, the gas exhaust valve is closed and a breaking valve 8 is opened to make a pressure gas 14 flow and a given pressure is obtained. And directly thereafter, a foamy synthetic resin is extruded from an extrusion cylinder nozzle 4 and it is induced into the mold cavity 1 while the pressure gas is being exhausted. And then, breaking valves 8, 11 are closed as well as a gas exhaust valve 5 is opened and resin is made to foam to perform an extrusion. EFFECT:A molding having a less residual molded distortion is obtained and there is no improper sinkage.
JP1471880A 1980-02-12 1980-02-12 Extrusion and its device Pending JPS56111646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1471880A JPS56111646A (en) 1980-02-12 1980-02-12 Extrusion and its device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1471880A JPS56111646A (en) 1980-02-12 1980-02-12 Extrusion and its device

Publications (1)

Publication Number Publication Date
JPS56111646A true JPS56111646A (en) 1981-09-03

Family

ID=11868913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1471880A Pending JPS56111646A (en) 1980-02-12 1980-02-12 Extrusion and its device

Country Status (1)

Country Link
JP (1) JPS56111646A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211425A (en) * 1982-05-24 1983-12-08 ジョージ　アール　リーズ Method and device for manufacturing two-wall internal corrugate plastic structure part with smooth non-spongy skin
JPS61239916A (en) * 1985-04-16 1986-10-25 Mitsubishi Plastics Ind Ltd Expansion injection molding method
CN102145533A (en) * 2008-08-26 2011-08-10 深圳大学 Heating equipment for steam heating mould

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211425A (en) * 1982-05-24 1983-12-08 ジョージ　アール　リーズ Method and device for manufacturing two-wall internal corrugate plastic structure part with smooth non-spongy skin
JPH0410411B2 (en) * 1982-05-24 1992-02-25
JPS61239916A (en) * 1985-04-16 1986-10-25 Mitsubishi Plastics Ind Ltd Expansion injection molding method
CN102145533A (en) * 2008-08-26 2011-08-10 深圳大学 Heating equipment for steam heating mould

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