To reduce costs, can ends of increasingly thin sheet metal have been and are still being used for packaging. At the same time, attempts are being made to utilise the maximum capacity of the production machinery.
The factor limiting the capacity of strip presses is often the cyclic strip feed into the tool.The strip must be accelerated and advanced for every stroke and then precisely reach its final position. This is only possible when the pusher dogs do not cause any noteworthy deformation in the rear edge of the strip. To achieve this, it is essential – especially for high capacities and for sensitive sheets – that the speed with which the pusher dogs impact the still stationary strips is as low as possible. To minimise the over-stroke of the pusher dogs during their rearward movement and hence minimise the impact speed during the forward stroke, improved pusher dogs with optimised link point have been developed and can be retrofitted in existing PA strip presses.