Vacuum die casting apparatus

Claim 1

A VACUUM MOLDING APPARATUS COMPRISING A BASE, A FIRST MOLD MEMBER SECURED TO THE BASE, A SECOND MOLD MEMBER MOVABLE RELATIVELY TOWARD AND FROM THE FIRST MOLD MEMBER, THE MOLD MEMBERS HAVING MATCHING FACES BETWEEN WHICH FACES A MOLD IS DEFINED, A TUBE CONNECTED TO ONE OF THE MOLD MEMBERS FOR INJECTION OF MOLTEN METAL INTO THE MOLD, A CHAMBER ADJACENT TO ONE OF SAID MOLD MEMBERS AND PARTIALLY DEFINED BY THE MOLD MEMBER TO WHICH IT IS ADJACENT, A VACUUM TUBE FROM THE CHAMBER TO THE FACE OF THE MOLD MEMBER TO WHICH THE CHAMBER IS ADJACENT, SEALING MEANS INCLUDING A FLEXIBLE HOLLOW AIR-TIGHT GASKET ON ONE OF SAID MOLD MEMBERS WHICH FORMS A VACUUM SEAL BETWEEN THE MOLD MEMBERS WHEN THEIR FACES ARE POSITIONED APART AND CLOSE TOGETHER, THE HOLLOW OF THE GASKET FORMING A COOLING TUBE, MEANS TO PUMP COOLING LIQUID THROUGH THE COOLING TUBE IN THE GASKET, MEANS ON THE BASE POSITIONING AND HOLDING SAID MOLD MEMBERS IN CLOSELY SPACED RELATION WITH EACH OTHER SO THAT THE FACES OF THE MOLDS ARE SEPARATED AND THE GASKET FORMS A VACUUM SEAL BETWEEN THE GASKET AND THE OTHER MOLD MEMBER, MEANS TO CREATE A VACUUM IN THE CHAMBER WHILE THE MOLD MEMBERS ARE IN SUCH SPACED POSITION, AND MEANS ON THE BASE FOR THEREAFTER MOVING SAID MOLD MEMBERS INTO FIXED CONTACT WITH EACH OTHER SO THAT THEIR FACES TOUCH AND FORM THE MOLD.