Actuator apparatus and method enabling multiple piston velocities
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United States of America Patent
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Jun 12, 2018
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N/A
app pub date -
Jan 12, 2017
filing date -
Dec 11, 2014
priority date (Note) -
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Abstract
An injection molding apparatus comprising a manifold, an actuator having a piston that divides an enclosed actuator housing into upstream and downstream actuator drive chambers, the piston having an internal piston chamber and a piston bore that communicates flow of the drive fluid between one of the upstream or downstream actuator drive chambers and the internal piston chamber, a flow rate controller adapted to enable flow of drive fluid between one of the upstream or downstream actuator drive chambers and a source of drive fluid at a first low rate of flow over a selected first portion of the stroke length of the piston and at a second high rate of flow over a selected second portion of the stroke length of the piston.
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