Screw-type extrusion machine with heating elements
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United States of America Patent
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-
Aug 27, 1996
Grant Date -
N/A
app pub date -
Oct 25, 1991
filing date -
Nov 3, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A screw-type extrusion machine has a housing with at least one housing bore, in which a screw shaft is arranged. The housing has outer surfaces, which have a non-constant distance to the wall of the at least one bore. The outer surfaces are provided with heating elements. In order to attain an approximately constant temperature along the circumference of the wall of the at least one bore, heating elements of a different specific heating capacity are arranged sectionally on the outer surfaces of the housing, the heating elements being such formed that the heating temperature at the wall of the at least one bore is approximately constant.
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