Extruder head for an extruder

Details Extruder head for an extruder Extruder head for an extruder

1993-10-08

1995-12-05

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

Including support or guide means for disassembled element

264 39, 425188, 425192R, B29C 4712

Patent

active

054723329

ABSTRACT:
A screw extruder, for use with or without a calender, has a divided or split extruder head with upper and lower parts or halves hingedly mounted on a collar secured to a flange at the discharge end of the extruder cylinder. Each of the upper and lower extruder halves is movable between an open innoperative position and a closed operative position by a piston cylinder unit acting between a fixture on the respective extruder head part and a fixture on the extruder cylinder. When in closed position, the upper and lower extruder head parts or halves are pressed toward one another by a pair of vertical piston-cylinder units, each having a cylinder with lower end engaging the upper extruder head part and a projection on a piston rod engaging the lower extruder head part. The vertical piston-cylinder units are mounted on pivoted carriers mounted on the collar on the extruder cylinder. The two carriers are interconnected by a horizontal piston-cylinder and are also movable vertically. Operation of the apparatus is effected by an electro-hydraulic control circuit having a processor by which sequential operation of the piston-cylinder units is controlled.

REFERENCES:
patent: 3902835 (1975-09-01), Theysohn
patent: 4354814 (1982-10-01), Grimminger et al.
patent: 4372736 (1983-02-01), Gooch et al.
patent: 4548568 (1985-10-01), Herbert et al.
patent: 4728279 (1988-03-01), Bellmer
patent: 4799874 (1989-01-01), Bellmer et al.
patent: 4824353 (1989-04-01), Hirschkorn
patent: 4983113 (1991-01-01), Hirschkorn
patent: 4995802 (1991-02-01), Muller et al.

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