Agitating – Rubber or heavy plastic working – With specified discharge means
Reexamination Certificate
2006-10-31
2006-10-31
Cooley, Charles E. (Department: 1723)
Agitating
Rubber or heavy plastic working
With specified discharge means
C366S079000, C366S100000
Reexamination Certificate
active
07128464
ABSTRACT:
The invention relates to a method for regulating the minimal value of the pressure in the first half of the metering zone in a direction of conveyance in a single-screw degassing extruder or in a cascade extruder during the conveying of a melt consisting of a thermoplastic. The single-screw degassing extruder or the cascade extruder each have a first screw section (13), a degassing zone (14), a metering zone (22), and a measuring control loop (M), which includes a pressure measuring sensor (P) in the first half of the metering zone, a regulator (R) and an actuator (S) for influencing the pressure in the metering zone. The pressure is measured by the pressure measuring sensor (P) and is set by the regulator (R) and the actuator (S) so that the minimal value at the location of measurement ranges from 0.1 to 10 bar.
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Meier-Kaiser Michael
Schaefer Bernhard
Cooley Charles E.
Roehm GmbH & Co.KG
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