The slitting and rewinding of flexible packaging film materials requires very high tension control. Because the film material is usually very thin, the tension during the rewinding process is relatively small, so the tension control range during the slitting and rewinding process is relatively small. This puts forward higher requirements for the tension control system of the machine. If the tension control is not precise enough, coupled with the uneven thickness of the film, the small rolls of film made on the same reel will have different tensions. If you have high quality requirements for film winding, you can take a look at the film slitting and rewinding machine of Wenzhou Binbao Machinery. Their equipment is controlled by 4 motors, and the rewinding shaft adopts a high-precision slip friction shaft tension control system. Their professional technicians will provide you with professional guidance.
Before the film material is used for packaging items, it often undergoes multiple processes such as slitting – printing (or coating) – compounding – slitting, etc., but the cutting methods in each slitting process are different. Common slitting methods There are: (1) edge trimming, cutting off the process edge material reserved in the previous process, which is mostly used for the processing of composite films and other materials; (2) cutting, cutting the wide coil into multiple rolls of narrow size materials; (3) Rolling, dividing the large-diameter material into several rolls of small-diameter material, which is equivalent to rewinding and so on. These methods are sometimes used in combination. No matter which process is used, the material after slitting should meet the corresponding technical indicators: size requirements (referring to the width and length of the slitting material, etc.) and quality requirements (flatness of the coil, surface quality, etc.).