Wide plastic film winding and roll changing equipment and method for mandrel-free center winding mode

Abstract

The invention discloses wide plastic film winding and roll changing equipment for a mandrel-free center winding mode. The equipment comprises a rack, wherein a front swing arm and a rear swing arm which are capable of synchronously swinging are arranged on the rack, and main winding chucks are respectively arranged on the upper ends of the two swing arms; a cutter bracket is also arranged on the rack, and a cutter for cutting off a plastic film is arranged on the cutter bracket; a core storage cavity used for storing a paper core tube is arranged on the rack, preliminary winding supports are respectively arranged on the front side and the rear side of the core storage cavity, and preliminary winding chucks are arranged on the preliminary winding supports; and a longitudinally extended friction roller is arranged below an outlet of the core storage cavity, a left side roller is further arranged on the upper left of the friction roller, and a right side carrier roller is further arrangedon the right side of the friction roller. According to the equipment, the non-stop roll changing can be automatically realized, and the paper core tube and a film roll cannot be bent and deformed ina winding process. The invention also provides a wide plastic film winding and roll changing method for the mandrel-free center winding mode.

Description

technical field [0001] The invention belongs to the technical field of plastic film rewinding and rewinding, and in particular relates to a wide-width plastic film rewinding and rewinding device and method suitable for central rewinding without a mandrel. Background technique [0002] After the plastic film is produced and formed, it can be rolled onto the paper core tube to form a coil. The surface of the paper core tube used in the winding process is equipped with adhesive materials. The outer diameter of the standard paper core tube is 96-110mm. The thickness of the cylinder wall is about 2mm. When the film roll wound by the paper core drum reaches the set diameter, the roll needs to be changed. During the roll changing process, the original film roll stops winding, while the upstream plastic film is still continuously conveyed to the winding station. In order not to stop the machine, the new paper core tube is required to be able to wind up the plastic film during roll ...

AI Technical Summary

Problems solved by technology

However, due to the large width of the wide-width plastic film, it is difficult to rewind and change the wide-width plastic film without the central winding die of the mandrel. The main reasons are as follows: the length of the paper core tube is large (may be as long as eight meters) ) and the diameter is small (only about 10 cm), and the wall of the paper core tube is only about 2mm, and the paper core tube is only clamped by the two winding chucks at the end, so under the action of gravity, the paper core tube The middle part of the paper core tube will bend downward, and under the action of the tension formed by the winding tension, the middle part of the paper core tube will be bent due to the tension, and the paper core is rotating at a high speed, and the centrifugal force will increase this bending deformation; The deformation will inevitably affect the winding quality, including the deformation of the film roll, the poor flatness of the end face of the film roll, and the compactness of the film roll.

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