Press and actuator therefor
OwnerRoger L. Medendorpinventor
Life of this patent
Estimating the term…
Abstract
A press includes a fixed platen, a vertically movable platen and a double toggle actuating mechanism for raising and lowering the movable platen. A piston cylinder breaks one of the toggle mechanisms, which in turn breaks the second toggle mechanism to raise the platen. A balance mechanism is operatively connected to the movable platen and assists in raising the movable platen and supporting the same in its raised position. A cut piston cylinder is connected to one of the toggle mechanisms.
Claims23
A forming press including a main frame, a fixed platen supported on the main frame, a movable platen supported on the main frame for movement towards and away from the fixed platen, and mechanical actuating means for shifting said movable platen from a first, open position to a second, forming position and holding the movable platen in the second, forming position, said mechanical actuating means comprising:
- first toggle means mounted on said main frame and operatively connected to said movable platen for moving said movable platen, said first toggle means being movable from a first position at which said movable platen is in its first position to a second position at which said movable platen is in its second position;
- shifting means connected to said first toggle means and said main frame for shifting said first toggle means between its first and second positions;
- and
- balance means operatively connected to said movable platen for assisting said shifting means and for assisting in the supporting of said movable platen when said movable platen is in its first position.
A press of the type having a pair of relatively movable platens, at least one adapted to support a forming die and further including actuating means for moving at least one of said platens between a first, open position and a second, forming position, wherein said improvement comprises:
- fluid actuator means operatively connected to said actuating means for shifting said platens to a cut position after a forming operation, said actuating means including a toggle means having a link, said fluid actuator means being pivotally connected to said link, and a balance means operatively connected to one of said platens for counterbalancing the weight of said platen to thereby reduce the load on said actuating means when said platens are moved from their second to their first positions.
An actuator adapted to raise and lower a load, said actuator comprising:
- a frame;
- a first toggle having a pair of pivoted links pivoted together by a rod, one of said links pivoted to the frame and the other of said links pivoted to the load;
- a second toggle having a pair of links pivotally interconnected, one of the links of said second toggle being pivoted to said first toggle pivot rod;
- a fluid actuator means connected to one of said links of said second toggle for breaking said second toggle to thereby break said first toggle and raise the load;
- and
- a counterbalance means operatively connected to the load for counterbalancing the weight of the load as said fluid actuator means breaks said second toggle to assist in raising the load and in reducing the power requirements for said fluid actuator.
A form and cut press for forming articles from a sheet of material and of the type having a pair of relatively movable platens mounted on a frame, said platens supporting a forming die and a cutting means, said press further including actuating means for moving at least one of said platens between a first open position, a second forming position and a third cutting position wherein said improvement comprises:
- First fluid actuator means operatively connected to said actuating means for shifting said movable platen to a forming position;
- said actuating means including a first toggle means extending in a generally vertical direction and having first and second links pivotally connected together at a first pivotal connection, said first link being connected to the movable platen and said second link being supported by said frame, said actuating means also including a second toggle extending generally in a horizontal direction and having third and fourth links pivotally connected together at a second pivotal connection, said third link being connected to said first toggle means at said first pivotal connection and said fourth link being supported by a second fluid actuator mounted on said frame;
- said first fluid actuator means being operatively connected to said second toggle means for breaking and extending said second toggle means causing corresponding breaking and extending of said first toggle means and opening and closing of said platen;
- said first toggle means being in a near extended position which is just short of its full lock or in-line position when the second toggle means is actuated to extended position by said second fluid actuator;
- said second fluid actuator having means for exerting a force on said second toggle means in a direction in line with said first and second pivotal connections when said second toggle means is in extended position and said first toggle means is in near extended position to thereby cause said first toggle means to move to full lock or in-line position so as to move said movable platen to cutting position.
Dependencies are inferred from the claim text.