Tips

Does it have trouble keeping up with the machine speed? Do you get frequent trim breaks or snags?

Often times, it's best to start at the beginning of the system when trouble shooting trim removal systems. Your problems may stem from improper pick up point design. Here are some things to consider:

1. Pickup nozzle design. Make sure the pickup nozzles are designed without sharp edges or corners. Check that the trim does not get caught or slowed by any part of the pickup nozzles. As a general rule of thumb "trumpet" type pick-up nozzles are the best to ensure zero snags as edge trim enters the trim removal system.
2. Pickup nozzle entry must have enough area to maximize air flow. If the opening of the pickup nozzle has less area than the duct throughout the system, air flow will be restricted, possible degrading system performance.
3. Geometry of pick up nozzle placement is very important. The pickup nozzles should be placed so the trim enters them in the web direction. If the trim enters the pickup nozzles at angle to the web flow, slitting performance, edge quality and trim removal performance will suffer.
4. Pick up nozzles should be placed very close to the pickup point to assist in removing the trim from the slit point.

Pickup nozzles and pickup point geometry is often overlooked as an important component of trim removal system design. Avoid improper intake design and you will help to ensure optimum trim removal system performance.