Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – With reshaping or surface embossing of formed article
Patent
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.
Burmester Alan F.
Cleereman Kenneth J.
Raspor O. Carl
Czaja Donald
Fischbach V.
Hessenaur, Jr. L. E.
The Dow Chemical Company
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