Film reel double-stage automatic tensioning and position adjustment mechanism

Abstract

The invention relates to the technical field of metallized films, in particular to a film reel double-stage automatic tensioning and position adjustment mechanism. The film reel double-stage automatictensioning and position adjustment mechanism comprises a fixing plate, a hollow shaft and a mandrel, wherein the hollow shaft is rotatably fixed on the fixing plate, the mandrel is set to pass through the hollow shaft, a drive mechanism is arranged on one side of the fixing plate, a clamping mechanism is arranged on one side, far away from the fixing plate, of the hollow shaft, the drive mechanism comprises an air cylinder and a servo motor, a piston rod of the air cylinder is connected with the end part of the mandrel, a rotation shaft of the servo motor is connected with the hollow shaft, the clamping mechanism comprises a middle ring, an expansion ring and a push-pull shaft, the expansion ring is arranged in the middle ring, the push-pull shaft is arranged on the part, in the middle ring, of the hollow shaft, in a sleeving mode, the contact surface of the push-pull shaft and the expansion ring is an oblique plane, a spring fixing part is arranged on the middle ring and extends towards the center of the middle ring, one end of a thrust spring is fixed on the spring fixing part, the other end of the thrust spring is connected with the push-pull shaft, one end, protruded out of the end part of the hollow shaft, of the mandrel, is connected with a supporting plate, and a connection part making contact with the end part of the push-pull shaft is arranged on the supporting plate.

Description

technical field [0001] The invention relates to the technical field of metallized film machinery, in particular to a film roll double-stage automatic tensioning and position adjustment mechanism. Background technique [0002] Metallized film capacitor is to evaporate a layer of metal film on the surface of polyester film instead of metal foil as an electrode, because the thickness of the metallized film layer is much smaller than the thickness of the metal foil, so the volume after winding is also smaller than that of the metal foil capacitor. Much smaller in size. The biggest advantage of metallized film capacitors is the "self-healing" characteristic. The so-called self-healing characteristic is that if the film medium has a defect at a certain point and a breakdown short circuit occurs under the action of overvoltage, the metallization layer at the breakdown point can be melted and evaporated instantly under the action of an arc to form a small metal-free area. , so tha...

AI Technical Summary

Problems solved by technology

[0003] When producing metallized film, it is necessary to use a winding machine to fix and rotate the film roll, so that the metallized film can be unwound effectively and evenly. The material disc is fixed in a tight way, and it is inconvenient to install and disassemble in this way, and it may become loose when the material disc rotates at high speed

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