Method and apparatus for the preparation of foamed thermoplastic

Details Method and apparatus for the preparation of foamed thermoplastic Method and apparatus for the preparation of foamed thermoplastic

1985-04-22

1987-09-15

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 455, 264 53, 264DIG11, 264DIG18, 425 4R, 425817R, C08J 922

Patent

active

046938567

ABSTRACT:
Expandible synthetic resinous particles are molded by injecting heated air generally centrally into the mold cavity by means of a probe, withdrawing the probe and heating the surface of the mold. Low densities and rapid cycle times are obtained.

REFERENCES:
patent: 2898632 (1959-08-01), Irwin et al.
patent: 3042967 (1962-07-01), Edberg
patent: 3953558 (1976-04-01), Hatano et al.
patent: 4073843 (1978-02-01), Smith

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