Method of forming blanks for the solid-phase forming of thermopl

Details Method of forming blanks for the solid-phase forming of thermopl Method of forming blanks for the solid-phase forming of thermopl

1982-09-29

1985-04-09

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

With reshaping or surface embossing of formed article

264120, 264235, 264294, B29C 2500

Patent

active

045101086

ABSTRACT:
An improved, essentially scrap-free, solid-phase process for making thermoplastic articles directly from resinous powder. The process can be particularly advantageous to forming large parts from thermoplastic resinous powders. The method essentially comprises taking resinous powder, briquetting the powder, sintering the briquette, repressing the powder in a warm state and then shaping the briquette into a preform or a blank which can then be thermoformed into a resulting container or other product, assuming the blank itself is not the desired end product. Alternatively, sintering can take place after repressing with preheating of the briquette prior to the repressing step.

REFERENCES:
patent: 3286008 (1966-11-01), Power et al.
patent: 4014965 (1977-03-01), Stube et al.
patent: 4161502 (1979-07-01), Wessling et al.
patent: 4323531 (1982-04-01), Bradley et al.

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