Method and apparatus for molding hollow articles from resins

Claim 1

APPARATUS FOR MOLDING HOLLOW ARTICLES FROM HEAT MOLDABLE POWDERED RESINS, INCLUDING A MODE HAVING A JACKET, MEANS FOR CONTINUOUSLY ROTATING THE MOLD AT A SELECTED SPEED ABOUT A FIRST AXIS, INDEPENDENT MEANS FOR SIMULTANEOUSLY ROCKING THE MOLD AT A SELECTED SPEED IN OPPOSITE DIRECTIONS FROM AN INTERMEDIATE POSITION ABOUT AN AXIS TRANSVERSE SAID FIRST AXIS, MEANS FOR VARYING THE EXTENT OF THE ROCKING MOTION IN EITHER DIRECTION FROM THE INTERMEDIATE POSITION, MEANS FOR CONTINUOUSLY CIRCULATING A HEATING MEDIUM THROUGH SAID MOLD JACKET DURING A MOLDING CYCLE WHILE THE MOLD IS ROTATED AND ROCKED AND FOR THEN CIRCULATING A COOLING MEDIUM THROUGH SAID JACKET BEFORE OPENING THE MOLD, AND TIMING MECHANISM FOR CONTROLLING THE OPERATIONS OF ROTATING THE MOLD, ROCKING THE MOLD, AND CIRCULATING THE HEATING AND COOLING MEDIA DURING THE MOLDING CYCLE.

Claim 3

THE METHOD OF MOLDING HOLLOW ARTICLES FROM HEAT MOLDABLE RESINS WHICH COMPRISES PLACING IN A JACKETED MOLD A MEASURED AMOUNT OF POWDERED RESIN, CONTINUOUSLY ROTATING THE MOLD AT A SELECTED SPEED ABOUT A FIRST AXIS AND SIMULTANEOUSLY INDEPENDENTLY ROCKING THE MOLD AT A SELECTED SPEED IN OPPOSITE DIRECTIONS FROM AN INTERMEDIATE POSITION ABOUT A TRANSVERSE AXIS TO DISTRIBUTE THE RESIN OVER THE MOLD SURFACES, VARYING THE EXTENT OF THE ROCKING MOTION IN EITHER DIRECTION FROM THE INTERMEDIATE POSITION FOR MAKING ARTICLES OF VARIOUS SHAPES, CIRCULATING A HEAT EXCHANGE MEDIUM THROUGH THE MOLD JACKET WHILE THE MOLD IS ROTATING AND ROCKING TO BUILD UP A LAYER OF SAID RESIN ON THE MOLD SURFACES, AND CORRELATING THE OPERATION OF ROTATING THE MOLD, ROCKING THE MOLD, AND CIRCULATING THE HEATING AND COOLING MEDIA DURING THE MOLDING CYCLE.

Claim 4

THE METHOD OF MOLDING HOLLOW ARTICLES FROM HEAT MOLDABLE RESINS WHICH COMPRISES PLACING IN A JACKETED MOLD A MEASURED AMOUNT OF POWDERED RESIN, CONTINUOUSLY ROTATING THE MOLD AT A SELECTED SPEED ABOUT A FIRST AXIS AND SIMULTANEOUSLY INDEPENDENTLY ROCKING THE MOLD AT A SELECTED SPEED IN OPPOSITE DIRECTIONS FROM AN INTERMEDIATE POSITION ABOUT A TRANSVERSE AXIS TO DISTRIBUTE THE RESIN OVER THE MOLD SURFACES, VARYING THE EXTENT OF THE ROCKING MOTION IN EITHER DIRECTION FROM THE INTERMEDIATE POSITION FOR MAKING ARTICLES OF VARIOUS SHAPES, CIRCULATING A HEAT EXCHANGE MEDIUM THROUGH THE MOLD JACKET WHILE THE MOLD IS ROTATING AND ROCKING TO BUILD UP A LAYER OF SAID RESIN ON THE MOLD SURFACES, AND CORRELATING THE OPERATION OF ROTATING THE MOLD, ROCKING THE MOLD, AND CIRCULATING THE HEATING AND COOLING MEDIA DURING THE MOLDING CYCLE.