Roll-over mechanism

A roll-over machine for foundry equipment comprising a base, a frame mounted on said base for turning movement through substantially 180.degree. between two positions, clamp and draw means on said frame operable from a retracted position in which items of foundry equipment are loaded and unloaded to an extended position in which such items are clamped for roll-over, said clamp and draw means including opposed first and second supports located when in said retracted position and said frame is in one of said two positions to allow loading and unloading of items of foundry equipment consisting of at least one or more parts, said first support engaging and supporting said equipment in response to movement of said clamp and draw means from said retracted position and operating thereafter to clamp said equipment for roll-over upon movement to said extended position, said second support operating after roll-over to engage and support one of said parts in response to movement of said clamp and draw means from said extended position and to thereafter draw said parts apart as movement continues toward said retracted position, and a piston and cylinder actuator connected to move said clamp and draw means between said retracted and extended positions.

A roll-over transfer for foundry equipment comprising a base, a frame supported on said base for substantial horizontal rolling movement between two spaced positions, said rolling movement causing said frame to turn through substantially 180.degree. as it moves between said positions, clamp and support means on said frame operable to receive and clamp an item of foundry equipment while said frame is in one of said positions, to support said equipment for inversion thereof as said frame moves to the other of said positions and to release inverted equipment for removal at said other position, and a linear actuator connected between said base and frame operable to apply a force movement to said frame which is a maximum as said frame moves from said one position, decreases as said frame moves to a near mid-position in which said force movement reverses and increases as said frame moves from said mid-position to said other position whereby said actuator is operable to provide a maximum of acceleration of said frame as said frame commences to move from said one position and a maximum deceleration of said frame as said frame approaches said other position.

A roll-over transfer comprising a base providing support rails, a transfer frame supported on said rails for rolling and translating movement between spaced first and second positions, said frame providing support means for supporting an object while said frame rolls between said positions and operating to turn and translate said object as said frame rolls between said positions, a linear actuator connected between said base and frame operable to move said frame between said positions, the connection between said actuator and said frame moving substantially with a cycloidal motion which reverses when said frame is substantially midway between said positions, said actuator producing force moments on said frame which are greatest when said frame is at each of said positions and decreases as said frame moves away from said positions, said actuator being operable to produce high accelerations as said frame moves from either position and high deceleration as said frame approaches either position, and control means interconnected between said frame and base maintaining the predetermined relationship between the translating movement and rotational movement of said frame as said frame moves between said positions.

A roll-over transfer for foundry equipment comprising a base, a frame supported on said base for rolling movement between two horizontally spaced positions, said rolling movement causing said frame to turn through substantially 180.degree. as it moves horizontally between said positions, clamp and support means on said frame operable to receive and clamp an item of foundry equipment while said frame is in one of said positions, to support said equipment for inversion thereof as said frame moves to the other of said positions and to release the inverted equipment for removal at said other position, power means connected to drive said frame between said two spaced positions, primary mechanical stop means on said base and frame operable to stop said frame in each of said two spaced positions under normal operation, and secondary stop means on said frame and base operable to positively prevent substantial over-travel of said frame in the event said frame arrives at either of said two spaced positions with excessive velocity.