Process and apparatus for underwater granulation of molten therm

Details Process and apparatus for underwater granulation of molten therm Process and apparatus for underwater granulation of molten therm

1990-11-19

1992-09-01

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

264143, 425 67, 425308, 425313, 425404, 425DIG230, B29B 906

Patent

active

051436736

ABSTRACT:
In order to prevent solidification of melt in the openings in an orifice plate of an underwater granulator during start-up, the water discharged from the housing of the granulator is diverted to a low pressure outlet so that during start-up a ring of water is formed on the inner surface of the housing. Thereby, melt strands from the orifice plate are cut in air and after the throughout of the melt becomes sufficiently high, the water discharged from the granulator is no longer diverted but is supplied to a post-treatment station and the housing becomes filled with water due to higher back pressure whereupon underwater granulation takes place.

REFERENCES:
patent: 4759889 (1988-07-01), Voss
patent: 5041251 (1991-08-01), McCoskey et al.

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