The rewinder is a special equipment for producing paper, mica tape and film. Its purpose is to rewind the paper roll produced by the paper machine (called the original paper roll) in turn, and the paper is rewound into finished paper before leaving the factory. At present, it has become a development trend for rewinder to replace DC drive with AC drive in papermaking machinery industry. The paper roll rolled by the paper rolling machine is soft, and the inside may be damaged or broken, and the edges on both sides are irregular, so the width of the paper cannot be directly used for paper processing or printing machine. Most kinds of paper (such as newsprint, letterpress paper, wrapping paper, etc.). ) Before leaving the factory, the paper roll core must be trimmed, cut, spliced and rewound to form a finished paper roll with certain specifications and tightness requirements. The rewinding process mainly completes three tasks: one is to cut off the raw edges of the base paper; Secondly, cut the whole base paper into several widths that meet the user's specifications; Thirdly, control the winding diameter of the finished paper roll to meet the factory specifications.