Extruder with temperature control
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United States of America Patent
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-
Mar 15, 1983
Grant Date -
N/A
app pub date -
Oct 8, 1981
filing date -
Oct 8, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A plastic material extruder having a barrel and an outer sheath with heating and cooling means in the outer sheath is disclosed, together with means for maintaining the temperature of the inner barrel, including two temperature sensing devices, one on the barrel and one on the other sheath, the sensing devices connected to control circuitry which actuates the heating and cooling means to maintain a temperature gradient between the two sensors by sensing the temperature change from the barrel and adjusting the set point of the sensing device on the sheath.
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