| 摘要 |
A can body making machine wherein a previously formed cup is wall-ironed and domed and then trimmed. The wall-ironing punch is actuated by an electric motor which drives a barrel cam. The primary ram, carrying the ironing punch is moved by a follower cooperating with a first track in the barrel cam. The secondary ram carrying a stripper punch is actuated by a follower cooperating with a second track in the barrel cam. The stripper punch telescopes within the ironing punch. The cam tracks are configured for a dwell of both punches at their fully retracted position to permit loading, and then to provide a constant speed movement of the two punches as a unit to engage a preformed cup and force it through wall-ironing tool pack and into a doming die. Upon completion of the doming operation the first track serves to quickly retract the ironing punch, while the second track holds the stripper punch stationary, to strip the formed can from the ironing punch, and thereafter returns the stripper punch quickly to its starting position. An indexing pocket conveyor transports the formed cans individually to a trimmer. A gravity chute feeds the preformed cups to the wall-ironing punch, and means are provided to re-round the cups for entry thereinto of the ironing punch. |
