Compression molding machine

Abstract

Abstract D R A W I N G A COMPRESSION MOLDING MACHINE WHEREIN AN UPPER SLIDE CARRYING AN UPPER MOLD PART IS ALOWED TO SLIDE DOWNWARDLY BY GRAVITY TO THE LOWER MOLD PART MOUNTED ON THE PRESS BED AND WHEREIN PULL RODS THEREAFTER PULL THE SLIDE DOWNWARDLY. A CLAMPING UNIT AT THE BOTTOM OF THE PRESS ONE FOR EACH PULL ROD, ADJUSTABLY SECURES TGHE LOWER END OF THE PULL ROD THEREIN. THE CLAMPING UNITS ARE HYDRAULICALLY ACTUATED TO MOVE A PISTON DOWNWARDLY WHICH IN TURN MOVES THE PULL ROD ASSOCIATED THEREWITH AND THE SLIDE DOWNWARDLY INTO CONTACT WITH A HYDRAULICALLY SUPPORTED STOP PISTON. BY THE TIME THE ACTUATING PISTON REACHES THE STOP PISTON, THE MOLD WILL HAVE BEEN FILLED OUT BY THE PLSTIC THEREIN AND THEN FURTHER MOVEMENT OF THE ACTUATING PISTON WILL MOVE THE STOP PISTON DOWNWARDLY FOR FURTHER COMPRESSION AND TO TAKE UP MATERIAL SHRINKAGE AND PRODUCE A GOOD FINISH. THE ACTUATING PISTON IS ADJUSTABLE SO THAT THE WORKING STROKE OF THE SLIDE WILL BE ONLY THAT WHICH IS NECESSARY FOR THE PARTICULAR PIECE BEING MOLDED.

Inventors

• 👤 Louis F Carrieri
• 👤 Edwin A Spanke

Bibliographic Details