Rounding mechanism and machining method for film medium of metallized film capacitor

Abstract

The invention relates to the field of film capacitors. A rounding mechanism for a film medium of a metallized film capacitor comprises a rounding rack, a rounding driving assembly, a rounding upper die and a rounding lower die; the rounding driving assembly and the rounding lower die are both fixed to the rounding rack; the output ends of the rounding upper die and the rounding lower die make contact with the upper and lower surfaces of the film medium correspondingly; the rounding driving assembly is used for driving the rounding upper die to move up and down; and the rounding upper die and the rounding lower die are used for rounding the film medium. According to the mechanism, the rounding steps of the film medium are reduced through arrangement of the rounding upper die, and rapid forming of rounded corners of the film medium is guaranteed.

Description

technical field [0001] The invention relates to the field of film capacitors, in particular to a metallized film capacitor film dielectric fillet mechanism and method and a metallized film capacitor film medium fillet cutting device. Background technique [0002] Metallized film capacitors are capacitors made of organic plastic film as the medium, metallized film as the electrode, and wound. Metallized film capacitors are widely used due to their excellent characteristics: non-polarity, high insulation resistance, excellent frequency characteristics (broad frequency response), and low dielectric loss. The films used in metallized film capacitors include polyethylene, polypropylene, polycarbonate, etc., and the film medium has an important impact on the performance of metallized film capacitors. The quality of film dielectric production directly affects the dielectric constant, dielectric strength, self-recovery characteristics and temperature stability of metallized film ca...

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Problems solved by technology

[0004] The prior art has the following deficiencies: 1. When cutting the continuous film medium, the upper cutting knife is driven down by the cylinder, and then the upper cutting knife contacts the lower cutting knife to cut off the continuous film medium between the upper and lower cutting knives; The cylinder is driven by gas, and the gas has a certain degree of compressibility; when the cylinder drives the upper cutting knife to move down and contact the upper surface of the lower cutting knife, the upper cutting knife receives a large reverse support force from the lower cutting knife; the reverse support force When it is transmitted to the drive cylinder, the gas in the cylinder is further compressed to drive the cylinder rod to move up and rebound; when the reverse support force is attenuated enough to further compress the gas in the cylinder, the cylinder rod moves upward and stops, and the upper cutting knife can fall stably ;In order to prevent the unstable upper cutting knife from cutting off other parts of the film medium in the process of moving up and rebounding, the continuous film medium needs to wait for the upper cutting knife to stabilize before continuing to move forward, thereby increasing the cutting of the film medium. At the same time, when the cylinder is used to drive, the gas-driven cylinder will generate a lot of noise when it moves up and down, which is not conducive to the improvement of the working environment

2. When filleting the adjacent film media, use the fillet mold to form one fillet at a time, and complete the filleting of the adjacent film medium in two times; and complete the filleting of the adjacent film medium in two times During the processing, the fillet mold needs to be punched and formed twice, resulting in more fillet steps, which is not conducive to the rapid prototyping of film medium fillets

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