Back to results
US 4,050,666 AGranted
Mold ejector multiplier
OwnerJake W. Van Ticheltinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerJake W. Van Ticheltinventor
Estimating the term…
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.
In an apparatus for forming a workpiece which comprises separable forming elements in which a workpiece is formed and in which, when the elements are separated, the workpiece must be removed from one of them, ejector means adapted to engage said work piece and to dislodge it from said one element, ejector actuating means for engaging said ejector means to cause it to move to and from a position at which it engages and dislodges said workpiece, ejector multiplier means responsive to the movement of said ejector actuating means to multiply the extent and speed of movement of said ejector means, the improvement in said ejector multiplier means which comprises hydraulic means for accelerating the movement of the ejector means responsive to the movement of said ejector actuating means.
Dependencies are inferred from the claim text.