High-efficiency production technology of thin-film capacitor

Abstract

The invention discloses a high-efficiency production technology of a thin-film capacitor. The production technology comprises: vapor plating of vapor plating layers is carried out on a front side and a back side of a thin base film according to a needed width, wherein the vapor plating zones and intervals of the front side and the back side are set fixedly and vapor plating of multiple grids is carried out; during winding, the metalized thin film having the front side and back side with the vapor plating layers and an optical film not processed by vapor plating are wound; a wound core is processed by pre-flattening treatment and is cut into multiple independent core units according to the needed width; heat treatment is carried out on the cut core units at the temperature of 110 to 165 DEG C, the optical film not processed by vapor plating is contracted uniformly and the end surfaces of the vapor plating layers at the two ends are exposed, and thus metal spraying is carried out at the two end surfaces reliably during the subsequent process and pins are led out. According to the invention, an objective that multiple core units can be wound by one-time winding can be achieved. The production technology being simple is easy to realize and the core width can be controlled accurately; and the production efficiency of the metallic thin-film capacitor can be substantially improved and the manufacturing cost can be lowered.

Description

technical field [0001] The invention relates to a production process of a capacitor, in particular to a high-efficiency production process of a film capacitor. Background technique [0002] At present, the traditional manufacturing process of metallized film capacitors uses two capacitor cores with aluminum or zinc-aluminum alloy evaporated on the surface of the film base film and metallized films with blank margins on the edges to form two poles. When winding, the two films are staggered by a certain width, which is called the wrong side. figure 1 shown. [0003] In the traditional metallized film capacitor production process, the winding process equipment can only roll two cores at a time, and because the equipment rotates at a high speed, the wrong side between the two films is prone to deviation, resulting in unstable product capacity and core failure. The sub-width is unstable, causing deviations to the subsequent pin spacing and low production efficiency. The cross-s...

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Problems solved by technology

[0003] In the traditional metallized film capacitor production process, the winding process equipment can only roll two cores at a time, and because the equipment rotates at a high speed, the wrong side between the two films is prone to deviation, resulting in unstable product capacity and core failure. The sub-width is unstable, causing deviations to the subsequent pin spacing and low production efficiency. The cross-sectional view of the traditional winding process is as follows figure 2 shown

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