Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Means for forming from bulk material – means for severing and...
Patent
1988-08-09
1990-09-04
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Means for forming from bulk material, means for severing and...
83177, 264141, 264142, 4253021, B28B 1116, B26F 300
Patent
active
049543520
ABSTRACT:
In an apparatus for producing particles of thermoplastic material by extruding material in a plastic state through orifices in a die plate and thereafter cutting the extruded plastic material into crumb upon exit from the orifices, an air supply is coupled to a cutting chamber for providing a stream of air across the face of the die plate to cut and convey the crumb away from the orifices. The cutting chamber is arranged to include a restricted throat having an exit area in close proximity to the orifices and a further portion for providing an accumulation zone adjacent the orifices, the accumulation zone having a cross-sectional area which increases from the exit area of the throat to a product discharge zone remote from the orifices in a downstream direction.
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Exxon Chemical Patents Inc.
Nguyen K. P.
Woo Jay H.
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