Redicon Corporation

Stephen D Doyle

Joseph D Bulso

James A McClung

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.

Shell tooling method

A system for forming unitary containers from flat metal stock includes a unique arrangement of both previously known and newly discovered apparatus, including means for blanking and cupping the flat metal stock into individual cups; means for drawing and redrawing the cups and bottom profiling them in one machine; and additional means for trimming, flanging, and beading the containers thus drawn. The system and method include, among other things, the utilization of apparatus which permits drawing, redrawing, and bottom profiling to take place in one press. This is accomplished by carrying draw, redraw, and bottom profile tooling in a single press and by inserting the cups in the press for the draw operation and them removing them and reinserting them for the redraw and bottom profile operations. The apparatus which makes it possible to perform the method in this fashion includes draw tooling; a first accumulator/divider table for feeding cups into the press and into the draw tooling; redraw and bottom profiling tooling; further apparatus for transferring the drawn cups from the press to a second accumulator/divider table and back into the press for the redraw and bottom profile operations. A further unique feature of the present system and apparatus is the disposition of the draw and redraw tooling within the press in alternating, balanced condition so that, in cooperation with the second accumulator/divider table, the press is at all times provided with a balanced load.

System, method for forming containers

Shell tooling

Apparatus for removing a drawn container from a draw horn which is carried by the inner slide of a double acting press includes a stripper assembly also carried by the inner slide and capable of controlled axial movement relatively of the draw horn. The draw horn and draw riser have coaxial, centrally disposed bores within which is received an elongate shaft of the stripper assembly. The distal end of the shaft carries a stripper pad while the proximal end is adjustably connected to a pivoting linkage mounted on the inner slide and normally pivoted under pressure by a pneumatically actuated piston so as to maintain the stripper assembly in retracted condition, the pad then forming the bottom of the horn. The method includes timing the press so that, upon movement of the inner and outer slides away from the bottom platen of the press, the inner slide trails the outer slide by a predetermined amount so that the outer slide comes into contact with one end of the pivoting linkage of the stripper assembly thereby overcoming the piston and enabling the stripper pad to be disposed in an axially extended position with respect to the draw horn. As the inner and outer slides continue to move away from the lower platen, the stripper pad, which is in contact with the bottom of the drawn container, effectively holds the container while the horn is pulled out of it. Final removal may be assisted by air pressure.

Method and apparatus for removing drawn container from draw horn

A method and apparatus for forming nestable two-piece containers includes forming a cup from a metal blank; redrawing the cup thus formed to approximately one-half its final height while imparting a tapered sidewall thereto by use of a tapered die center; redrawing the container thus formed to its full height while continuing the taper by use of a second tapered die center while simultaneously profiling the bottom of the container thus drawn. The apparatus includes at least two redraw stations, each including a tapered redraw die center and corresponding die. The second of said stations also includes bottom profiling tooling.

Tapered container and method and apparatus for forming same

A system for forming unitary containers from flat metal stock includes a unique arrangement of both previously known and newly discovered apparatus, including means for blanking and cupping the flat metal stock into individual cups; means for drawing and redrawing the cups and bottom profiling them in one machine; and additional means for trimming, flanging, and beading the containers thus drawn. The system and method include, among other things, the utilization of apparatus which permits drawing, redrawing, and bottom profiling to take place in one press. This is accomplished by carrying draw, redraw, and bottom profile tooling in a single press and by inserting the cups in the press for the draw operation and then removing them and reinserting them for the redraw and bottom profile operations. The apparatus which makes it possible to perform the method in this fashion includes draw tooling; a first accumulator/divider table for feeding cups into the press and into the draw tooling; redraw and bottom profiling tooling; further apparatus for transferring the drawn cups from the press to a second accumulator/divider table and back into the press for the redraw and bottom profile operations. A further unique feature of the present system and apparatus is the disposition of the draw and redraw tooling within the press in alternating, balanced condition so that, in cooperation with the second accumulator/divider table, the press is at all times provided with a balanced load.

System and apparatus for forming containers

An integrated system and apparatus for completely forming the body of a two-piece can in one press, including performing the operations of cupping, drawing, redrawing, bottom profiling, and trimming. The system includes the concept of performing all of the operations required to form the body of a two-piece can in one press and includes feeding the precoated stock material, either in the form of sheet or coil, through a lubricator and into a feeding apparatus which, in turn, selectively feeds sufficient quantities of the stock material into a press. The press carries the double die necessary to perform the typical blanking and cupping operation and passes the cups out of the press in two lanes onto cup conveyors which feed them back into the press whereupon the draw-redraw dies on both sides of the cup die perform the additional steps of first redraw, second redraw, bottom profile, and trimming. The formed containers are then conveyed to secondary processing stations such as beaders, testers, or palletizers. In this fashion, a complete can body can be formed cheaply and economically without the normal expense of conventional forming mechanism.

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North Canton, OH, United States of America

Stephen D Doyle