Apparatus for producing molded plastic articles

Details Apparatus for producing molded plastic articles Apparatus for producing molded plastic articles

1978-10-23

1984-02-14

Hall, James R.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including both heating and cooling means

425403, 425436R, 425437, 425457, 249 66A, 249 66C, 249137, 249175, A01J 2512

Patent

active

044313977

ABSTRACT:
An apparatus and process for forming molded articles from particulate plastic material. A hollow heat-conductive male mold is surrounded with particulate plastic material. Heat is applied to the interior of the mold until the temperature of the outer surface is above the fusion temperature and below the melting temperature of the particulate plastic material. This temperature is maintained until an article of desired thickness is formed. Thereafter, loose particulate material is removed from the outer surface of the molded article and heat is again applied to the interior of the mold so as to cause the outer surface of the molded article to become smoother. Finally, the article and mold are cooled and the article is removed from the mold.

REFERENCES:
patent: 2907070 (1959-10-01), Van Hartesveldt
patent: 3177275 (1965-04-01), Brenner
patent: 3501125 (1970-03-01), Fransson

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