Full-aluminum type metallized film and vacuum coating device thereof

Abstract

The invention relates to a full-aluminum type metallized film and a vacuum coating device thereof. The device comprises a winding chamber and a coating chamber. An unreeling roller, a film releasing transition roller, a first tension adjusting roller, a first flattening roller, a cooling roller, a press roller, a second tension adjusting roller, a guide roller, a second flattening roller, a traction roller and a reeling roller are arranged in the winding chamber. An aluminum wire sending mechanism, a fusion crucible, a liquid discharging pipe, a station rotary disc, a stepping motor and a bottom plate are arranged in the coating chamber. According to the vacuum coating device of the full-aluminum type metallized film, through the optimization design on existing evaporation crucible structures, centrifugal force is utilized for reducing the content of aluminum oxide particles in aluminum steam sprayed out of a steam crucible, meanwhile, aluminum steam sprayed out of the evaporation crucible can be prevented from escaping all around, and the aluminum steam sprayed out of the evaporation crucible is bundled in a centralized manner; and directivity is good, controllability is high, the aluminum steam utilization rate is high, and an aluminum coated layer formed through evaporation is dense in structure and uniform in component.

Description

technical field [0001] The invention relates to an all-aluminum metallized film and a vacuum coating device thereof, belonging to the technical field of capacitors. Background technique [0002] Energy shortage and environmental degradation have become global problems that threaten human survival. The development of new energy is the only way to achieve sustainable human development. Shift to clean energy. [0003] It will be the future development trend of the power industry to gradually replace traditional energy with new energy for power generation. New energy power generation mainly includes solar power generation, wind power generation, biomass power generation, geothermal power generation, tidal power generation, etc. [0004] Urban rail transit refers to a mode of transportation with the characteristics of large volume, high speed, safety, punctuality, environmental protection, energy saving and land use, including subway, light rail, maglev, express rail, tram, new ...

AI Technical Summary

Problems solved by technology

However, since the aluminum wire melts in the evaporating crucible and is easily oxidized to generate a large amount of alumina impurities during the evaporation process, the aluminum content in the aluminized layer after the coating is not more than 97%. Aluminum impurities will lead to a significant decrease in the capacity of the capacitor, so currently in the fields of new energy power generation, new energy vehicles, or urban rail transit, capacitors made of aluminum-plated metallized films are rarely used as energy storage elements

In addition, since the environment in the vacuum coating machine is a negative pressure environment, the aluminum vapor is easy to scatter and escape when it flows out of the evaporating crucible, which makes a part of the aluminum vapor wasted, the utilization rate of the aluminum vapor is limited, and the overflowing aluminum The steam is easily distributed unevenly, which makes the aluminum plating layer easy to cause uneven distribution, resulting in defects, which makes the subsequent aluminum-plated metallized film easy to break down at the defect, which has a negative impact on the safety and long service life of the capacitor.

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