Molding machine

Claim 1

A MOLDING MACHINE FOR THERMOSETTING PLASTIC MATERIALS COMPRISING MEANS FOR HOLDING A PLURALITY OF PREFORMS OF SUCH A MATERIAL IN A SUBSTANTIALLY VERTICAL STACKED RELATIONSHIP, A HIGH FREQUENCY PREHEATING CHAMBER HAVING WALLS MADE OF AN ELECTRICALLY CONDUCTING MATERIAL, SAID WALLS INCLUDING ONE SUBSTANTIALLY HORIZONTAL WALL FORMING A FLOOR FOR SAID CHAMBER, A PNEUMATICALLY OPERATED PUSHER TO ENGAGE THE LOWERMOST OF SAID PREFORMS AND MOVE IT INTO SAID PREHEATING CHAMBER BY SLIDING IT ON TO SAID FLOOR, MEANS FOR PRODUCING STANDING ELECTROMAGNETIC WAVES IN SAID PREHEATING CHAMBER FOR A PREDETERMINED INTERVAL WHEREBY SAID PREFORM IS HEATED, A HEATED HOLD, A SECOND PNEUMATICALLY OPERATED PUSHER TO ENGAGE SAID PREFORM AFTER IT HAS BEEN HEATED IN SAID PREHEATING CHAMBER AND TRANSFER IT TO SAID MOLD BY SLIDING IT ALONG SAID FLOOR, PNEUMATICALLY OPERATED POSITIONING MEANS FOR ACCURATELY POSITIONING SAID PREFORM IN SAID MOLD, A HEATED HYDRAULIC RAM FOR APPLYING PRESSURE TO THE PREFORM IN THE MOLD FOR A PREDETERMINED INTERVAL WHEREBY SAID PREFORM IS FORMED INTO A PART HAVING SUBSTANTIALLY THE SAME SHAPE AS THE MOLD, THE MOLDED PART BEING CURED AND HARDENED BY THE HEAT OF THE MOLD AND RAM AND THE CONTINUING PRESSURE DURING SAID INTERVAL, MEANS FOR EJECTING THE FINISHED PART FROM SAID MOLD, AND MEANS FOR REMOVING SAID PART FROM THE MACHINE.