Hydraulic press and control therefor

Abstract

Abstract A HYDRAULIC PRESS HAVING FIXED AND MOVABLE PLATENS BETWEEN WHICH A MOLD ASSEMBLY MAY BE HELD FOR RECEIVING AN INJECTION OF A BOTTOM-FORMING COMPOSITION IN THE MANUFACTURE OF SHOES, A LARGE CYLINDER CONTAINING A PISTON MOVABLE THEREIN A RELATIVELY SHORT DISTANCE TOWARD AND AWAY FROM THE FIXED PLATEN FOR EFFECTING MOVEMENT OF THE MOVABLE PLATEN TOWARD THE FIXED PLATEN FOR CLAMPING AND AWAY FROM THE FIXED PLATEN FOR UNCLAMPING, VALVE MEANS FOR SUPPLYING PRESSURE TO THE LARGE CYLINDER TO APPLY CLAMPING PRESSURE AND FOR EXHAUSTING CLAMPING PRESSURE TO PERMIT CONTROLLED MOVEMENT OF THE MOVABLE PLATEN AWAY FROM THE FIXED PLATEN, A CONTROL PISTON MOVABLE IN CONSONANCE WITH THE LARGE PISTON THROUGH A DISTANCE WHICH IS A RELATIVELY LARGE MULTIPLE OF THE DISTANCE THROUGH WHICH THE LARGE PISTON MOVES, A SWITCH OPERABLE BY MVEMENT OF THE CONTROL PISTON AS THE LATTER MOVES AWAY FROM THE FIXED PLATEN TO DISABLE THE VALVE MEANS AND HENCE TERMINATE MOVEMENT OF THE LARGE PISTON AWAY FROM THE FIXED PLATEN, AND THE MEANS FOR ADJUSTING THE INITIAL POSITION OF THE SWITCH TO OBTAIN ACCURATE CONTROL OF THE MOVABLE PLATEN AWAY FROM THE FIXED PLATEN AND HENCE SEPARATION OF THE MOLD PARTS.

Inventors

• 👤 Friedrich Koch
• 👤 Helmut Heym

Bibliographic Details