Reinforced plastic die

Claim 1

A REINFORCED PLASTIC DIE FOR STAMPING SHEET METAL PANELS, SAID DIE COMPRISING A SUBSTANTIALLY FLAT METAL BASE MEMBER, A QUANTITY OF A HARDENED FILLED RESIN HAVING GRAVEL DISPOSED THERETHROUGH BONDED TO SAID BASE MEMBER, A PLURALITY OF SPACED ANCHOR MEMBERS EXTENDING FROM SAID BASE MEMBER INTO SAID RESIN, SAID FILLED RESIN CONTAINING APPROXIMATELY 25% TO 40% BY WEIGHT OF HARDENABLE RESIN, 10% TO 20% BY WEIGHT OF A METAL POWDER, 40% TO 60% BY WEIGHT OF HYDRAULIC CEMENT AND SUFFICIENT HARDENER FOR SAID RESIN, A THIN LAYER OF FIBER GLASS CLOTH ADHERING TO THE SURFACE OF SAID HARDENED FILLED RESIN-STONE MIXTURE OPPOSITE SAID BASE MEMBER, SAID FIBER GLASS CLOTH BEING IMPREGNATED WITH A HARDENED MIXTURE CONTAINING ABOUT 50% TO 75% BY WEIGHT OF EPOXY RESIN, 10% TO 30% BY WEIGHT OF SILICA FLOUR AND SUFFICIENT HARDENER FOR SAID RESIN, A PLURALITY OF SPACED BRIDGE CHAPLETS LOCATED AT THE INTERFACE OF SAID BODY AND SAID LAMINATE, AND A LAMELLAR OVERLAY OF FILLED HARDENED RESIN BONDED TO SAID IMPREGNATED FIBER GLASS CLOTH LAYER OPPOSITE SAID PLASTIC LAYER.