Roller head opening and closing apparatus in roller head extrude

Details Roller head opening and closing apparatus in roller head extrude Roller head opening and closing apparatus in roller head extrude

1989-07-13

1991-01-22

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

425192R, 425194, 425327, B29C 4708

Patent

active

049867458

ABSTRACT:
A roller head opening and closing apparatus in a roller head extruder includes parallel upper and lower rollers disposed at an extrudate outlet end of the extruder and having axes extending orthogonal to the longitudinal axis of the extruder. Two frames are rotatably journaled at opposite ends of the rollers and can pivot about the axis of the lower roller. Actuators pivot the frames from a position in which the roller axes lie in the same vertical plane to a position in which the upper roller is swung away from the extrudate outlet so that a maintenance space is created between the extrudate outlet and the upper roller. This permits the use of a stationary electric motor for driving the lower roller, and so avoids the need for electrical contacts which compensate for motor movement.

REFERENCES:
patent: 3359597 (1967-12-01), Bainton
patent: 3895898 (1975-07-01), Theysohn
patent: 4127373 (1978-11-01), Anders et al.
patent: 4354814 (1982-10-01), Grimminger et al.
patent: 4372736 (1983-02-01), Gooch et al.

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