SIMULTANEOUS WORKING AND DEVICE FOR CAN MAIN BODY REDUCING*NECKING* AND FLANGING

摘要

Apparatus and methods for simultaneously necking and flanging an unformed end portion next adjacent a rim portion of a cylindrical side wall portion of a sheet metal can body member to form a curved necked-in wall portion in the unformed end portion next adjacent and connected to the side wall portion and to form a radially and axially outwardly extending flange portion between the formed curved necked-in portion and the rim portion comprising:PPMEANS FOR ROTATABLY SUPPORTING THE CAN BODY MEMBER DURING THE NECKING AND FLANGING OPERATION; PPOUTER FORMING MEANS MOUNTED WITHOUT THE CAN BODY MEMBER IN RADIALLY OUTWARDLY SPACED RELATIONSHIP TO AND IN AXIAL ALIGNMENT WITH THE UNFORMED END PORTION AND HAVING A CURVED ANNULAR OUTER FORMING SURFACE EXTENDING THEREAROUND FOR ENGAGING THE OUTER PERIPHERAL SURFACE OF THE UNFORMED END PORTION TO FORM THE CURVED NECKED-IN PORTION;P PINNER FORMING MEANS MOUNTED WITHIN THE CAN BODY MEMBER IN RADIALLY INWARDLY SPACED RELATIONSHIP TO AND IN AXIAL ALIGNMENT WITH THE UNFORMED END PORTION AND HAVING FIRST AND SECOND AXIALLY OPPOSITELY DISPLACEABLE ANNULAR INNER FORMING SURFACES FOR ENGAGING AXIALLY SPACED PORTIONS OF THE INNER PERIPHERAL SURFACE OF THE UNFORMED END PORTION LOCATED ON AXIALLY OPPOSITE SIDES OF THE CENTER OF CURVATURE OF THE CURVED ANNULAR OUTER FORMING SURFACE TO FORM THE CURVED NECKED-IN PORTION AND THE FLANGE PORTION WHILE PREVENTING RADIAL INWARD DISPLACEMENT OF THE RIM PORTION; ANDPPACTUATING MEANS FOR CAUSING RELATIVE ROTATIONAL MOVEMENT BETWEEN THE CAN BODY MEMBER AND THE OUTER FORMING MEANS AND FOR CAUSING RELATIVE RADIAL DISPLACEMENT THEREBETWEEN TO ENGAGE THE ANNULAR OUTER FORMING SURFACE WITH THE OUTER PERIPHERAL SURFACE OF THE UNFORMED END PORTION AND PROGRESSIVELY MOVE THE ANNULAR OUTER FORMING SURFACE RADIALLY INWARDLY RELATIVE TO THE CAN BODY MEMBER UNTIL THE CURVED NECKED-IN PORTION AND THE FLANGE PORTION HAVE BEEN FORMED IN THE UNFORMED END PORTION.