DE2433705A1 - Verfahren zur herstellung eines formstuecks aus geschaeumtem kunststoff - Google Patents

Verfahren zur herstellung eines formstuecks aus geschaeumtem kunststoff

Info

Publication number
DE2433705A1
DE2433705A1 DE2433705A DE2433705A DE2433705A1 DE 2433705 A1 DE2433705 A1 DE 2433705A1 DE 2433705 A DE2433705 A DE 2433705A DE 2433705 A DE2433705 A DE 2433705A DE 2433705 A1 DE2433705 A1 DE 2433705A1
Authority
DE
Germany
Prior art keywords
core
mixture
surface layer
layer
mold
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
DE2433705A
Other languages
German (de)
English (en)
Inventor
Kazuo Fukada
Shigeyoshi Fukushima
Youjiro Iwai
Sadao Nishita
Hideyo Noda
Yoshio Yamada
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.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber 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 Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Publication of DE2433705A1 publication Critical patent/DE2433705A1/de
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/34Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/08Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
    • B29C44/083Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
    • B29C44/086Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04Polyurethanes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
DE2433705A 1973-07-12 1974-07-12 Verfahren zur herstellung eines formstuecks aus geschaeumtem kunststoff Pending DE2433705A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48079126A JPS5027866A (enrdf_load_stackoverflow) 1973-07-12 1973-07-12

Publications (1)

Publication Number Publication Date
DE2433705A1 true DE2433705A1 (de) 1975-05-07

Family

ID=13681231

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2433705A Pending DE2433705A1 (de) 1973-07-12 1974-07-12 Verfahren zur herstellung eines formstuecks aus geschaeumtem kunststoff

Country Status (2)

Country Link
JP (1) JPS5027866A (enrdf_load_stackoverflow)
DE (1) DE2433705A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987000122A1 (en) * 1985-07-10 1987-01-15 Lagomat Ab A method for manufacture of shell-shaped castings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS608033A (ja) * 1983-06-27 1985-01-16 Kureha Chem Ind Co Ltd 熱可塑性樹脂円筒状物の冷却方法と装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845997A (en) * 1954-03-09 1958-08-05 Curtiss Wright Corp Foamed plastic seat and the like
US2908943A (en) * 1957-10-25 1959-10-20 Bill Jack Scient Instr Co Process for molding two-layer polyurethane articles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987000122A1 (en) * 1985-07-10 1987-01-15 Lagomat Ab A method for manufacture of shell-shaped castings

Also Published As

Publication number Publication date
JPS5027866A (enrdf_load_stackoverflow) 1975-03-22

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Legal Events

Date Code Title Description
OHJ Non-payment of the annual fee