초록 ▼

A method and apparatus for forming end panels or shells for two-piece cans includes incorporation of the tooling necessary to form the panel within a double acting press. The tooling includes a fluid actuated hold down sleeve, carried by the outer slide of the press, which is capable of being moved

A method and apparatus for forming end panels or shells for two-piece cans includes incorporation of the tooling necessary to form the panel within a double acting press. The tooling includes a fluid actuated hold down sleeve, carried by the outer slide of the press, which is capable of being moved into holding engagement with the metal from which the panel is formed. The inner slide of the press carries a punch which is movable into forming engagement with the metal and the outer slide carries tooling which is capable of blanking the metal against a cut edge carried by the fixed lower platen of the press. The chuck wall of the end panel is then preliminarily formed by the action of the punch drawing the blank around the fixed radius of a die core member fixedly carried by the bottom press platen. Further downward movement of the punch drapes the metal about the radius just referred to and finally sets the chuck wall against a fluid supported cushioning member carried by the lower platen so that, in effect, a reverse draw about the periphery of a fixed die core center is achieved. The method of this invention includes utilization of the apparatus just described and primarily relates to the cushioning and reverse draw action for finally setting the chuck wall.

대표청구항 ▼

Apparatus for forming an end panel from a blank of metal in a double acting press having inner and outer slides and a lower platen, comprising: (A) fluid actuated pressure means, carried by the outer slide of the press and being movable into holding engagement with the metal; (B) blanking means carr

Apparatus for forming an end panel from a blank of metal in a double acting press having inner and outer slides and a lower platen, comprising: (A) fluid actuated pressure means, carried by the outer slide of the press and being movable into holding engagement with the metal; (B) blanking means carried by the outer slide of the press and the fixed lower platen thereof; (C) forming means carried by the inner slide of the press for forming the panel; (D) die means carried by the lower platen for initially forming a chuck wall of the panel in cooperation with said blanking means and said forming means; (E) cushioning means carried by the lower platen and resiliently supporting the panel in the chuck wall area against the force of the forming means during final formation of the chuck wall; (F) said die means including a die core fixed to said lower platen and a die core ring carried by said lower platen in encircling relationship with said die core, said blanking means on said lower platen encircling said die core ring and being spaced therefrom so that said outer slide blanking means telescopically moves over said die core ring between said lower platen blanking means and die core ring to initially form said chuck wall; and (G) said cushioning means including a piston between said die core and said die core ring.