Method for producing an elastomeric crumb using gas to first cut

Details Method for producing an elastomeric crumb using gas to first cut Method for producing an elastomeric crumb using gas to first cut

1990-02-14

1991-11-05

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By impinging or atomizing with gaseous jet or blast

264142, 264500, 425 6, 425 721, 425289, B29C 902

Patent

active

050630024

ABSTRACT:
A method for producing particles of polymeric material by extruding hot, sticky material in a plastic state through orifices in a die plate. The extruded plastic material is cut into crumb upon exit from the orifices by a high velocity gas stream, suitably air, and the particles conveyed away from the die face. The air supply is coupled to a cutting chamber for providing the 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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