Static molds – Including means to apply force to remove or release product... – Pin or sleeve means
Patent
1976-11-19
1977-09-27
Flint, Jr., J. Howard
Static molds
Including means to apply force to remove or release product...
Pin or sleeve means
425444, B28B 710, B29C 700, B29F 114
Patent
active
040506665
ABSTRACT:
A mold ejector multiplier is described in which the mold ejector is attached to the fast acting piston of a dual piston hydraulic device consisting of a main cylinder having a closed bottom adapted to act both as a cylinder and as a reservoir for hydraulic fluid with an outer piston adapted to reciprocate in the cylinder and an inner piston adapted to reciprocate in a cylindrical bore in the outer piston. Both pistons are in contact with the hydraulic fluid in the hydraulic fluid reservoir, so that when one piston is pushed in, the other automatically is pushed out and vice versa. The relative size of the two pistons, advantageously, is such that the inner piston moves more than one unit length for each unit length of movement of the outer piston. The device is mounted in the actuating plate of the mold ejector system with the inner piston connected to a mold ejector and the outer piston arranged to abut a stationary part of the mold when the actuating plate is moved to actuate the ejectors. Engagement of the outer piston by the fixed part of the mold causes it to enter the cylinder and to propel the inner piston out. This multiplies the rate at which the ejector is moved into contact with the workpiece so that the workpiece can be dislodged and ejected from the mold without manual intervention.
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patent: 3893644 (1975-07-01), Drozick
patent: 3914086 (1975-10-01), Hujik
Flint, Jr. J. Howard
Hueschen Gordon W.
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