Pelletizing process

Details Pelletizing process Pelletizing process

1977-10-25

1979-04-24

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264142, 264169, 264570, B29C 1706

Patent

active

041512510

ABSTRACT:
An extrusion pelletizing process is disclosed wherein coolant is injected into the stream of thermoplastic material being extruded in such a fashion to interrupt the flow thereof and form discrete material lengths thereof as the material moves through the extrusion die and exits at the other end thereof in the form of pellets. The coolant is permitted to at least partially vaporize upon contact with the material stream and accordingly forms a solidified shell therearound including end portions of adjacent pellets so as to effectively separate such as they pass through the die. Such system enables the formation of discrete material lengths or pellets without the need of conventional cutting apparatus such as knives and the attendant support equipment necessary in their use.

REFERENCES:
patent: 3213170 (1965-10-01), Erdmenger et al.
patent: 3981959 (1926-09-01), Cuff

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