Extruder with temperature control

Details Extruder with temperature control Extruder with temperature control

1981-10-08

1983-03-15

Welsh, Maurice J.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

264 401, 264 406, 425144, 425160, B29B 106

Patent

active

043766234

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.

REFERENCES:
patent: 3751014 (1973-08-01), Waterloo
patent: 3866669 (1975-02-01), Gardiner

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