Process and apparatus for producing packing material particles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 13, 1990
Grant Date -
N/A
app pub date -
Nov 30, 1984
filing date -
Jun 9, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a 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 over the cross section of the mass, comes out of an opening in the die with a bent surface. The extruded plastic material is cut off directly 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 (28) provided with longitudinal grooves (35) in the material pull-in zone (13). The result is a possibility for some of the plastic granules to escape into the longitudinal grooves (35) and an increased and steadier transport of material through the extruder (FIG. 1).
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