Vacuum coating equipment for processing metallic films

Abstract

The invention discloses vacuum coating equipment for processing metallic films. The vacuum coating equipment comprises a vacuum chamber, a feeding mechanism, a coating mechanism and a winding mechanism, wherein the feeding mechanism, the coating mechanism and the winding mechanism are arranged inside the vacuum chamber; the feeding mechanism comprises a first lifting mechanism and a feeding device; a preheating mechanism is arranged between the feeding mechanism and the coating mechanism; a first movable plate assembly adjusting an opening of a first evaporation boat is arranged in the opening area of the top of the first evaporation boat; a second movable plate assembly adjusting an opening of a second first evaporation boat is arranged in the opening area of the top of the second evaporation boat; film limiting devices are arranged between the feeding mechanism and the coating mechanism as well as between the coating mechanism and the winding mechanism; the winding mechanism comprises a fifth lifting mechanism and a winding device; and an extension end of the fifth lifting mechanism is matched with the winding device to drive the winding device to move up and down. The vacuum coating equipment has the advantages that the automation degree is high, supplementing and collecting are convenient and timely, preheating is uniform, the preheating degree can be adjusted, the processing requirements of the films of various models can be met and the coating thickness can be adjusted.

Description

technical field [0001] The invention relates to the technical field of coating machines, in particular to a vacuum coating machine for metallized film processing. Background technique [0002] The metallized film is the main part of the capacitor, and its quality directly affects the service life of the capacitor. At present, the metallized film is mainly processed and prepared by a vacuum coating machine, including an insulating film feeding mechanism, a coating mechanism, and a film winding mechanism after the metal layer is plated. Yet the vacuum coater of prior art has the following weak points: [0003] (1) Since the plated metal layer such as aluminum is easily oxidized, the entire processing equipment is carried out under vacuum conditions, and the feeding mechanism for feeding the insulating film usually uses a feeding roller, and the amount of winding insulating film is limited. When the insulating film on the feeding roller is almost unwound, it is necessary to c...

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Problems solved by technology

[0003] (1) Since the plated metal layer such as aluminum is easy to oxidize, the entire processing equipment is carried out under vacuum conditions, and the feeding mechanism for feeding the insulating film usually uses a feeding roller, and the amount of winding insulating film is limited. When the insulating film on the feeding roller is almost unwound, it is necessary to change the roller or rewind the film again, such as the vacuum coating machine for ultra-high square resistance metallized film disclosed in patent application 201320431310.X, and the one disclosed in patent application 201310324470.9 All there is above-mentioned problem in a kind of flexible winding evaporation type vacuum coater

The vacuum coating machine disclosed in the patent application 200910303404.7 realizes uninterrupted feeding of the film by loading the film on the tray and cooperating with the conveying mechanism. However, the amount of film loaded on the tray is small after all, which cannot meet the industrial mass production requirements. The convenience of feeding , timeliness needs to be improved

[0004] (2) If the existing vacuum coating machine is directly coated by the coating mechanism after being fed by the feeding device, the surface temperature of the insulating film is low and the stability of the coating is poor

However, the shielding devices in the existing technology are mostly fixed. In addition, the structure and shape of the through groove on the shielding device cannot be changed, so that one device can only process one type of film. If the shielding device can be automatically changed, The opening area of ​​the evaporation boat and the distance between it and the evaporation drum are adjustable, which can meet the production of various types of films

[0007] (5) The problems of the winding device are exactly the same as those of the feeding device, and the convenience and timeliness of receiving materials need to be improved

[0008] (6) During the transportation of the insulating film, if the tension is uneven, the phenomenon of floating will be found, which will affect the normal transmission of the film

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