Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to close mold
Patent
1987-12-23
1989-07-11
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to close mold
264405, 425590, B29C 4567
Patent
active
048466646
ABSTRACT:
A hydraulic actuator assembly for use in a mold clamping unit of an injection molding machine. The actuator assembly serves as a rapid-travel drive for mold opening and closing movements and as a source of elevated mold clamping pressure. Among the hydraulic elements contributing to the operation of the mold clamping unit are a power piston for effecting elevated mold clamping pressures and a drive piston for effecting rapid die closing movements. With the hydraulic actuator system of the present invention, it is possible to control the operation of the mold clamping unit based on two-sided hydraulic influencing of the power piston and the drive piston.
REFERENCES:
patent: 4131596 (1978-12-01), Allen
patent: 4380427 (1983-04-01), Hehl
patent: 4565116 (1986-01-01), Hehl
Heitbrink Timothy W.
Woo Jay H.
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