Method of centrifugally pelletizing certain synthetic plastic ma

Details Method of centrifugally pelletizing certain synthetic plastic ma Method of centrifugally pelletizing certain synthetic plastic ma

1982-02-16

1984-05-08

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

264142, B29C 600

Patent

active

044473834

ABSTRACT:
Uniform pellets of thermoplastic material are formed by centrifugally expressing strands of heated material from orifices on the rim of a hollow rotor and severing the strands with a linearly moving endless blade at a selected radial distance from the rim. The severed pellets pass in a tangential path through a cooling spray at the entrance to a pellet outlet duct. The severing blade is mounted on a bracket for movement to and from the severing position and for adjustment radially and circumferentially of the rotor axis. Two blade assemblies are employed alternately so that blade replacement may be accomplished without interrupting operation. Downstream from the outlet duct an auxiliary knife-gate is employed adjacent a scrap duct and is movable from a severing position to a scrap duct closing position.

REFERENCES:
patent: 4408972 (1983-10-01), Layfield
patent: 4412964 (1983-04-01), Todd et al.

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