Analysis of the Causes of Abnormal Operation of Rewinding Machine

The rewinding machine is a device designed for materials such as paper and film. Its function is to rewind the paper rolls produced by the paper machine to meet the requirements of converting paper into finished paper that can be shipped directly. At present, the papermaking machinery industry is tending to use AC drive technology instead of traditional DC drive technology to drive the rewinding machine.

The paper rolls processed by the rewinding machine are often relatively soft in their initial state, and there may be damage or breakage inside. The edges on both sides are irregular, and the paper width is not uniform. Therefore, these paper rolls cannot be directly used in subsequent processes such as paper processing or printing. For most types of paper, such as newsprint, letterpress printing paper and packaging paper, they must go through the process of trimming, slitting, splicing and rewinding on the paper roll core of the rewinding machine to form a finished paper roll that meets specific specifications and tightness requirements before it can be shipped.

During the operation of the rewinding machine, one of the common abnormal conditions is "abnormal copying". This abnormality is manifested as the core tube length is correct and the core tube has been lowered to the front track, but the trolley fails to push the core tube to the corresponding position of the rear section, resulting in the core tube backlog in the front section and the automatic tube loading function stops. For this problem, the following solutions can be taken: manually load the tube to process the current batch, and adjust the tool settings online, adjust the copying order or slightly adjust the paper width (±1-2mm), and then reset the system. Usually, adjusting the tool settings online once can solve the problem, but there have been cases where it returned to normal after three consecutive adjustments, which may point to a problem with the program.

Another common abnormality is "tube loading abnormality". When the knife setting is correct, the core tube has reached the ready position, and the inductive limiter has sensed the existence of the core tube, the rewinding machine fails to start the automatic tube loading function. For this situation, the following measures can be taken: first reset the system, manually load the tube to process the current batch, and adjust the tool settings online. During the manual tube loading process, check whether the limiter near the tube pusher position is interfered by damaged paper. After the inspection, start the machine, accelerate the operation, reset the system again, and switch to automatic mode. Normally, it should be able to return to normal at this time.

In addition, if the operator puts the tube on too fast, does not pay attention to the core tube in the track, and automatically puts on the next batch of core tubes after resetting and clearing the data, this may cause the tube pusher motor protection alarm. At this time, stop feeding paper, take out all the core tubes in the track, and manually adjust the tube pusher to the initial position on the inner touch screen to resolve the abnormality.