Machine for injection molding of selfhardening resins

Claim 1

AN INJECTION MOLDING MACHINE FOR INJECTING A SELFHARDENING SYNTHETIC RESIN INTO A MOLD, SAID MACHINE COMPRISING A CYLINDER ADAPTED TO CONTAIN A CHARGE OF SAID RESIN, A DIAPHRAGM OF INERT FLEXIBLE MATERIAL PERIPHERALLY ATTACHED TO THE INSIDE WALL OF THE CYLINDER FOR SHIELDING SAID WALL FROM THE RESIN, A PLUNGER SLIDABLE IN THE CYLINDER FOR EXERTING A FORWARD FORCE UPON THE REAR SIDE OF THE DIAPHRAGM TO CAUSE THE DIAPHRAGM TO PUSH THE RESIN IN FRONT OF IT, A RESIN DELIVERY CONDUIT CONNECTED TO THE FRONT END OF THE CYLINDER, AN INJECTION HEAD HAVING A CHAMBER IN COMMUNICATION WITH THE CONDUIT, A MOUTHPIECE AT THE FRONT END OF SAID HEAD, A PLUNGER GUIDED FOR RECIPROCATION IN SAID CHAMBER, AND A GUIDE MEMBER OF INERT FLEXIBLE MATERIAL PERIPHERALLY FASTENED TO THE INSIDE WALL OF THE HEAD AND CENTRALLY FASTENED TO THE FRONT END OF THE PLUNGER FOR SHIELDING THE REAR PARTS OF THE PLUNGER FROM THE RESIN.