Extrusion of insulating plastic
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United States of America Patent
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-
Oct 19, 1982
Grant Date -
N/A
app pub date -
Apr 2, 1981
filing date -
Jun 17, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Molten plastic material is extruded uniformly about an advancing core by dividing a single stream of the plastic flowing to a die assembly transversely to the direction of advance of the core, into a plurality of streams, in which one half of the plastic flows along a first path spaced around the core and then towards the core; the other half of the plastic flows in a second path which is, in essence, a mirror image of the first path; the divided streams are reunited as a tubular sleeve of flowing plastic flowing in the direction of the advancing core, spaced around the core and flowing towards the advancing core.
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