A screw press comprises a HUSILLO GIRATORIO (5), a flywheel (8) rotating continuously in one direction of rotation and a slip clutch pressure controlled, WHOSE coupling disc (12) PRODUCE A FRICTION BETWEEN THE PISTON (5) AND STEERING WHEEL (8) WHEEL TO PRODUCE stroke. The press also is provided with a drive OPERATING REVERSE (15; 23) RETURN FOR TRAVEL CARTS tool holder (3) seesaw AND IS IN THE VOLUME OF A CYLINDER inside the machine. THAT IS CONNECTED TO POWER AIR CYLINDER (13) to compensate WEIGHT, WHICH HAVE A CAMERA ALMACENAMIENTOCOMPRESION (27), a volume ON TOP OF PISTON AND OTHER AT THE BOTTOM (26A and 26B respectively). THE OPERATING MODE PRESS can be improved, especially REFERRED TO REDUCE ENERGY REQUIREMENTS FOR BRAKING CARRIAGE (3) OCCUR AFTER THE JOURNEY DERETORNO. It is therefore necessary to amend the return speed of the piston (31) COMPENSATION TO REGULATE THE WEIGHT AND THE RETURN JOURNEY TO BLOCK THE AIR THAT WAS DISPLACED BY THE PISTON (31) or truck tool holder (3).
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