Tire building drum

Abstract

Abstract A TIRE BUILDING APPARATUS HAVING AN INTERMEDIATE EXPANDABLE DRUM EMBODYING AXIALLY MOVABLE INTERMEDIATE DRUM EXPANDING AND CONTRACTING MEANS TO DISPOSE THE INTERMEDIATE EXPANDABLE DRUM IN POSITIONS DEFINING SUBSTANTIALLY CYLINDRICAL SUPPORTING SURFACES OF DIFFERENT RADII, END DRUM AND TIRE BEAD SHOULDER SUPPORTING MEANS MOVABLE AXIALLY WITH MOVABLE DRUM EXPANDING AND CONTRACTING MEANS, END DRUM CARRIER MEANS MOVABLE AXIALLY WITH AND RELATIVE TO THE END DRUM AND BEAD SHOULDER SUPPORTING MEANS, END DRUMS SUPPORTED BY SAID END DRUM CARRIER MEANS AT OPPOSITE ENDS OF THE INTERMEDIATE DRUM, AND TIRE SHOULDER CARRIER MEANS MOVABLE AXIALLY OF AN RELATIVE TO THE END DRUM CARRIER MEANS IN WHICH THE TIRE BEAD SHOULDER CARRIER MEANS IS PROVIDED WITH TIRE BEAD SHOULDER FORMING MEANS MOUNTED ON THE END DRUM CARRIER MEANS ADAPTED TO BE POSITIONED TO FORM TIRE BEAD SHOULDERS OPPOSITE THE ENDS OF THE INTERMEDIATE EXPANDABLE DRUM IN PREDETERMINED AXIAL POSITIONS OF THE END DRUM CARRIER MEANS AND THE TIRE BEAD SHOULDER CARRIER MEANS. THE INCORPORATION IN AN ASSEMBLY AS LASTER NOTED IN WHICH END DRUM ADJUSTING MEANS ASOCIATED WITH THE END DRUM CARRIER MEANS PROVIDES FOR DISPOSING THEN END DRUMS WITHIN A PREDETERMINED RANGE OF AXIALLY SPACED APARAT RELATIONSHIPS WITH RESPECT TO EACH OTHER TO DISPOSE THE TIRE BEAD SHOULDER FORMING MEANS WITHIN A PREDETERMINED INFINITE RANGE OF SPACED APART RELATIONSHIPS WITH RESPECT TO EACH OTHER. A TIRE BUILDING APPARATUS HAVING THE AFOREMENTIONED INTERMEDIATE EXPANDABLE DRUM AND END DRUMS AT OPPOSITE ENDS OF THE INTERMEDIATE DRUM WHICH IN AN INITIAL OR STARTING POSITION DEFINE A SUBSTANTIALLY CYLINDRICAL SUPPORTING SURFACE WITH THE INTERMEDIATE DRUM ASSEMBLY FOR SUPPORTING TIRE CARCASS MATERIAL IN THE FORM OF A CYLINDER, IN WHICH THE END DRUM CARRIE MEANS ARE MOVABLE AXIALLY TOWARD EACH OTHER TO REMOVE THE END DRUMS AND THE END PORTIONS OF THE TIRE CARCASS MATERIAL ON THE END DRUMS AXIALLY TOWARD EACH OTHER TO COMPENSATE OR ALLOW FOR THE FORMATION OF TIRE BEAD SHOULDERS, AGAINST WHICH TIRE BEADS ARE POSITIONED, BY THE RADIAL OUTWARD MOVEMENT TIRE BEADS ARE POSITONED, BY THE RADIAL OUTWARD MOVEMENT OF THE TIRE CARCASS MATERIAL ON THE INTERMEDIATE EXPANDABLE DRUM BY THE TIRE BEAD SHOULDER FORMING MEANS WITHOUT SUBSTANTIALLY DISTORING THE TIRE CARCASS MATERIAL AROUND THE INTERMEDIATE DRUM ASSEMBLY AND THE END DRUMS, AND IN WHICH OPPOSITE END PORTIONS OF THE TIRE CARCASS MATERIAL ARE LAYED OVER THE TIRE BEADSW TO ENCASE THE TIRE BEADS. THE AFOREDESCRIBED TIRE BUILDING APPARATUS FOR BUILDING A RADIAL TIRE IN WHICH THE TIRE BEADS ARE ENCASED IN TIRE CARCASS MATERIAL HAVING SUBSTANTIALLY INEXTENSIBLE REINFORCING CORDS EXTENDING AXIALLY FROM BEAD TO BEAD, AND EMBODYING CONTROL MEANS BETWEEN THE END DRUM AND BEAD SHOULDER SUPPORTING MEANS AND THE DRUM CARRIER MEANS SO THAT THE ENCASED AND ANCHORED TIRE BEADS MAINTAIN THE REINFORCING CORDS UNDER TENSION FROM BEAD TO BEAD PROVIDING A CONSTANT BEAD TO BEAD DIMENSION IS DISPLACEMENT OF TIRE CARCASS MATERIAL INTO SUBSTANTIALLY TOROUS CONFIGURATION APPROXIMATING THAT OF A COMPLETED TIRE. AN END DRUM ASSEMBLY FOR A TIRE BUILDING APPARATUS INCLUDING AN END DRUM MEMBER FOR SUPPORTING AN INFLATABLE PLY TURN-UP BAG MEANS IN WHICH THE BAG MEANS HAS OPPOSED BUT SPACED APART TAPERED ANCHOR ENDS ADAPTED TO BE RETAINED ON THE END DRUM IN A MANNER FOR PREVENTING OUTWARD MOVEMENT OF THE ANCHOR ENDS OF THE BAG MEANS.

Inventors

• 👤 Larry C Frazier
• 👤 Emerson C Bryant

Bibliographic Details