Film winding and replacing equipment

Abstract

Thin film winding and replacing equipment comprises a rack, a friction roller, a main winding shaft, a standby winding shaft and a main winding shaft support are installed on the rack, the main winding shaft support comprises a first-stage main support and a second-stage main support, a first linear guide rail is arranged on the first-stage main support, and the second-stage main support is installed on the first linear guide rail of the first-stage main support in a sliding mode; a shaft storage support used for placing a standby winding shaft is further arranged, and the shaft storage support comprises a first-stage shaft storage support and a second-stage shaft storage support; the first-stage shaft storage support is provided with a second linear guide rail, and the second-stage shaft storage support is installed on the second linear guide rail of the first-stage shaft storage support and can slide along the second linear guide rail. The surface of the friction roller is further provided with a long-strip-shaped gap allowing the cutting edge of the cutter to be exposed out. The device can automatically complete the roll changing procedure in the winding process, and tension fluctuation caused before and after a thin film is cut off in the roll changing process cannot be transmitted to the upstream of the friction roller; in addition, the tangential direction of the film cut by the cutter is the transverse direction of the film.

Description

technical field [0001] The invention belongs to the technical field of film rewinding and changing, and in particular relates to a film rewinding and changing device. Background technique [0002] After the film is produced, it is usually wound up on a winding shaft to become a film roll. Distinguish from the perspective of the film winding power source, the film winding form includes the following two forms: the first is the center winding, as the name implies, the power of the film roll rotation comes from the winding shaft located in the center of the film roll, and the winding shaft It is directly driven by the winding motor; the second type is surface winding. As the name implies, the power of the film roll rotation comes from the surface friction roller (friction roller for short) that is in contact with the surface of the film roll. The friction roller presses on the surface of the film roll and The film roll is rubbed and rubbed, and the friction roller is directly ...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the main reel, spare reel and cutter need a certain amount of space to move, and the space around the friction roller is limited, it is necessary to temporarily remove the pressure roller during the roll change, and then, during the process of cutting the film by the cutter During the middle and a period of time after cutting, the film tension near the upstream of the friction roller fluctuates greatly or even completely loses, and the film in these parts will be wound up on the new main paper core tube, which belongs to the bottoming part of the new film roll. Ultimately, it leads to problems of poor primer quality, film wrinkles, and uneven end faces of film rolls

[0006] 2. Generally, the machine cannot be stopped during the roll change process, but the film is still continuously conveyed from the upstream and downstream continuously during the roll change, and the direction of travel is perpendicular to the direction in which the cutter moves laterally. In the process of moving and cutting in the width direction, the film is still moving at a high speed, so the tangent line formed by the cutter on the film is an oblique line, and the film part next to the tangent line is a right triangle, and the length may exceed ten meters (depending on the moving speed of the cutter, film Width, film travel speed), which is not a small waste for some expensive films that need to be changed frequently, and the edge of the right triangle cut needs to be trimmed before use

Images