Method of production of expansion-molded article, from foamable

Details Method of production of expansion-molded article, from foamable Method of production of expansion-molded article, from foamable

1987-07-23

1989-04-18

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 37, 264 403, 264 404, 264 53, 264 85, 264DIG5, 264DIG9, 264DIG10, 264DIG15, 425 4R, 425140, 425146, 425149, C08J 922, B29C 6722

Patent

active

048225428

ABSTRACT:
This invention relates to a method and apparatus for improving not only the quality of the production of molded foamable thermoplastic resin particles converted into fusion-bonded materials but also the output by protecting the resin from atmospheric pressure by pressurizing the particles and heating the particles to soften the same.

REFERENCES:
patent: 3013966 (1961-12-01), Pollard et al.
patent: 3126432 (1964-03-01), Schuur
patent: 3953558 (1976-04-01), Hatano et al.
patent: 3988404 (1976-10-01), Orimo et al.
patent: 4032609 (1977-06-01), Smith
patent: 4440703 (1984-04-01), Akiyama et al.
patent: 4443393 (1984-04-01), Akiyama et al.

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