Process for producing packing material particles

Details Process for producing packing material particles Process for producing packing material particles

C - Chemistry, Metallurgy

08

J

18/722

C08J 9/16 (2006.01)

Patent

CA 1259769

ABSTRACT In the case of a process for producing pourable spherical-segment-shaped packing material particles made of a plastic material which have an external convex and an internal concave surface, the plastic material is fed in by means of a feeding funnel through an opening in a bush surrounding the extrusion screw. The plastic material is plasticized and, because of the difference in speed existing of the cross section of the mass, comes out of an opening in the die with a bent surface. The extruded plastic material is cut offdirectly at the opening of the die and before any considerable expansion has taken place. In this case, the plastic material is pulled into a space between the extrusion screw and a bush provided with longitudinal grooves in the material pull-in zone. The result is a possibility for some of the plastic granules to escape into the longitudinal grooves and an increased-and steadier transport of material through the extruder.

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