Patent ID: 6852257

Claim:
A method for controlling extruder temperature having: sensing an actual screw speed for an extruder screw in an extruder barrel, said extruder barrel having at least one heat exchange means; indexing and storing a plurality of screw speeds, each of said stored screw speeds corresponds to a temperature reset value; comparing said actual screw speed with each of said stored screw speeds; selecting one of said stored screw speeds, said selected screw speed being a member of said plurality of stored screw speeds having a value most arithmetically equivalent to said actual screw speed, said step of selecting retrieves said temperature reset value corresponding to said selected, stored screw speed; and generating a control output driver signal to said heat exchange means, said control output driver signal being responsive to said retrieved temperature reset value, wherein the improvement comprises: delaying a control alarm for a predetermined time when generating a control output driver signal to the heat exchange means is at or near maximum capacity.