Extruder with feedback loop control

Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor

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Details

366 90, 425209, B29C 4700

Patent

active

058366806

ABSTRACT:
An extruder for extruding an associated material includes an extruder housing that has a feed section, a center section that includes a throttle section, and an outlet section with an extruder screw disposed in the extruder housing. The extruder also includes a throttle at the throttle section. The throttle has a plurality of pins that extend radially into the housing. The pins are adjusted by a cam extending around the extruder housing. The cam has an inner wall that has a plurality of cam surfaces engageable by pins. The radius of each of the cam surfaces gradually decreases from a maximum radius to a minimum radius distance. The pins have springs that urge the pins radially outward to contact the inner wall of the cam. The cam is rotated by a piston and cylinder assembly. The extruder further includes sensors for temperature, gauge, weight, and other properties of the material. The extruder also has a control apparatus for controlling the speed of the extruder and the throttle based upon any combination of temperature, gauge, weight, and production requirements while the extruder is in operation.

REFERENCES:
patent: 4178104 (1979-12-01), Menges et al.
patent: 4462691 (1984-07-01), Boguslawski
patent: 4735565 (1988-04-01), Capelle
patent: 4900155 (1990-02-01), Schwarz et al.
patent: 4906102 (1990-03-01), Schwarz et al.
patent: 5141426 (1992-08-01), Capelle
patent: 5147198 (1992-09-01), Capelle
patent: 5158725 (1992-10-01), Handa et al.
patent: 5190771 (1993-03-01), Baumgarten
patent: 5215374 (1993-06-01), Meyer
patent: 5332309 (1994-07-01), Ramazzotti
patent: 5362146 (1994-11-01), Nogossek

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