Evaporation drum of a coating machine

Abstract

The invention provides an evaporation drum of a coating machine and belongs to the technical field of machinery, solving the problem of poor cooling effect of the existing evaporation drum of the coating machine. The evaporation drum of the coating machine comprises an outer cylinder, an inner cylinder and a middle shaft, wherein a first cooling flow channel and a second cooling flow channel are distributed in double helix form in the axial direction of the outer cylinder; the middle shaft penetrates through the outer cylinder and the inner cylinder; the middle shaft is provided with a liquid inlet and a liquid outlet; a first liquid inlet channel and a first liquid outlet channel are formed at the two ends of the first cooling flow channel, respectively; a second liquid inlet channel and a second liquid outlet channel are formed at the two ends of the second cooling flow channel, respectively; the port of the first liquid inlet channel and the port of the second liquid outlet channel are located on the same cross section of the middle shaft; the port of the second liquid inlet channel and the port of the first liquid outlet channel are located on the same cross section of the middle shaft; the first liquid inlet channel and the second liquid inlet channel are communicated with a liquid inlet, respectively; the first liquid outlet channel and the second liquid outlet channel are communicated with a liquid outlet, respectively. The evaporation drum of the coating machine has the advantages that the cooling liquid is evener in distribution, the surface temperature of the evaporation drum is consistent and the coating quality of the plastic thin film is better.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a coating machine, in particular to an evaporation drum of the coating machine. Background technique [0002] Vacuum coating is a technology that forms a uniform thickness film on the surface of the material to be plated by heating the atoms of the coating material in a vacuum environment and then striking them on the material to be plated. Vacuum coating technology can be applied to aluminum coating on laser discs (CDs), metal coating on printed circuit boards, and metal or metal alloy coatings on plastic films. [0003] During the coating process of the plastic film, due to the small thickness of the plastic film, it is difficult to fix, so it is necessary to use the evaporation drum to support the plastic film to be coated. However, the small thickness of the plastic film will also cause it to be easily burned through by the atoms of the coating raw material during the coatin...

AI Technical Summary

Problems solved by technology

[0005] But, the problem that the dual channel water-cooled coating roller that above-mentioned winding coater is used is: 1, the cooling waterway is comparatively complicated, and the cooling waterway has the longer part not to have cooling effect or the cooling effect is not obvious, for example, the first water inlet pipe, The second water inlet pipe and the water outlet pipe cause the cooling system to respond slowly, which prolongs the preparation time before the use of the coating roller and affects the processing efficiency; 2. The first water inlet pipe, the second water inlet pipe and the water outlet pipe are all set separately. Inside the shell, the inner shell has a socket relationship with the outer shell. Such a structure complicates the processing technology of the coating roller and increases the manufacturing cost. At the same time, due to the many pipeline connection structures, it is difficult to ensure the sealing of the interface.

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