Film roll core

Abstract

The invention belongs to the technical field of roll cores, and particularly relates to a film roll core. The film roll core comprises a body. The body is provided with a first groove in the length direction, the first groove communicates with the interior of the body, circular baffles are arranged at the two ends of the first groove correspondingly, inner circles of the baffles sleeve outer circles at the two ends of the body, and first circular plates are arranged on the side walls of the inner circles at the two ends of the body. First rods are symmetrically arranged on the opposite faces between the two first circular plates, and the first rods are embedded in clamping grooves formed in the side walls of the inner circles of the body. A rolling roller is arranged between the two firstcircular plates. The two ends of a rolling pipe are hinged to the center positions of the first circular plates through torsion springs, and a plastic film is wound around the outer circle of the rolling roller. Through cooperation of the first groove, the rolling roller, the torsion springs and the first circular plates, the problem that the surfaces of the outer circles of the body are uneven issolved.

Description

technical field [0001] The invention belongs to the technical field of winding cores, in particular to a film winding core. Background technique [0002] Film core products are suitable for winding, storage and transportation of various optical films, high-performance films, metal foils and high-grade papers, and cylindrical paper or plastic cores are usually used for continuous winding when film winding is performed. Since the film is continuously wound on the core, and the film material will have a certain internal stress during its preparation process, the internal stress of the film after winding will be released slowly over time, which may eventually cause the surface of the film to be damaged. A series of unevenness occurs due to the uneven release of internal stress. [0003] In the application number 2016213261381, a slotted core to improve the flatness of the film is provided. By setting a buffer groove on the core body, the internal stress of the film after windin...

AI Technical Summary

Problems solved by technology

Since the film is continuously wound on the core, and the film material will have a certain internal stress during its preparation process, the internal stress of the film after winding will be released slowly over time, which may eventually cause the surface of the film to be damaged. A series of unevenness occurs due to uneven release of internal stress

[0003] In the application number 2016213261381, a slotted core to improve the flatness of the film is provided. By setting a buffer groove on the core body, the internal stress of the film after winding will be slowly released and squeezed as time goes by. Press the core body to reduce the diameter of the core body, thereby solving the occurrence of a series of uneven phenomena on the surface of the film due to uneven release of internal stress; When returning particles, it will also cause unevenness of the film after winding

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