Can the Pneumatic Trim Handling Systems of Today Meet the Needs of the New High Speed Winders?, 1990 Finishing and Converting Conference Proceedings

Production demands in the paper industry are requiring winders and rewinders to operate at ever-increasing speeds. And, winder manufacturers are responding with new machines that are achieving previously unattainable speeds. However, traditional trim systems designed for older machines may not be able to cope with this new technology.

An inadequate trim handling system can cause severe edge breaks, expensive web damage, and substantial downtime. With the higher speed technology, rejected product and downtime equates to major dollar losses in a very highly competitive industry where cost of production is the key to profitability.

The importance of a well designed trim handling system has never been more important. However the design and implementation of pneumatic trim handling systems defies exactness. It requires the application of engineering principles combined with extensive practical ex-perience to develop a system to meet the exacting production and quality control requirements of today’s paper making and converting industry where the production rates have grown by as much as 100% over the past 5 years. Highly advanced trim handling systems must be individually engineered to meet the need. Traditional approaches will not provide the performance criteria.

When designing a system to work in conjunction with high speed machines, the designer must take into consideration the following critical factors: (a) The type and method of trim capture, (b) The type of system design to be employed, and (c) The type of product/ air separator used at the material discharge end of the system. Each of the above factors play an important role in the overall success of any pneumatic trim removal system.