Fast cycle plasticator/injector unit for molding machines

Details Fast cycle plasticator/injector unit for molding machines Fast cycle plasticator/injector unit for molding machines

1991-04-01

1992-06-23

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With accumulator, trap chamber, or serially arranged valves...

2643284, 366 79, 366289, 425561, 425562, 425585, B29C 4560

Patent

active

051238330

ABSTRACT:
A fast cycle plasticator/injector unit for plastic molding machines having a screw type plasticating extruder for feeding thermoplastic material through a sealed fluid flow path to an accumulator which periodically feeds the thermoplastic material through a sealed fluid flow path to an injector that comprises a cylinder with an inlet and an outlet port and a powered piston valve element disposed for reciprocating axial and rotary motion within said cylinder and having a fluid flow channel along a portion of its length in cooperative structural relationship with said inlet port to provide an open fluid flow channel between the inlet port and the charge chamber of said cylinder when the piston is in a first rotational orientation and to block fluid flow from the inlet port to the cylinder when the piston is in a second rotational orientation.

REFERENCES:
patent: 2581477 (1952-01-01), Franks
patent: 3395424 (1968-08-01), Novel
patent: 4557683 (1985-12-01), Meeker et al.
patent: 4695238 (1987-09-01), Taniguchi
patent: 4784819 (1988-11-01), Spurr

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