The concept of evaporation vacuum coating machine

       The concept of evaporation vacuum coating machine

  Evaporation vacuum coating machine is a process in which the material to be filmed is placed in a vacuum for evaporation or sublimation, so that it is deposited on the surface of the workpiece or substrate. The metal coating in the evaporation vacuum coating machine is usually aluminum film, but other metals can also be deposited by evaporation.

The concept of evaporation vacuum coating machine

  The principle of evaporation vacuum coating machine is:

  The metal is heated to the evaporation temperature. Then the steam is transferred from the vacuum chamber and condenses on the low temperature parts. The process is carried out in a vacuum, and the metal vapor will not oxidize when reaching the surface. When the resin is vapor-deposited, it is necessary to adjust the vapor deposition time in order to ensure that the heat emitted when the metal is cooled does not deform the resin. In addition, metals or alloys with too high melting point and boiling point are not suitable for vapor deposition.

  process flow

  1. Degreasing treatment Clean with acetone or alcohol

  2. Surface treatment (if necessary) Corona discharge treatment, ultraviolet radiation treatment, etc.

  3, bottom coating/hardening treatment (if necessary)

  In order to obtain a beautiful vapor-deposited film, it is sometimes necessary to perform a bottom coating treatment. The following effects can be obtained by coating the bottom surface:

  (1) Improve the adhesion between the resin and the deposited film

  (2), fill in the small irregularities on the surface of the molded product to obtain a mirror-like surface

  Whether it is a evaporation vacuum coating machine for obtaining a mirror effect, or a evaporation vacuum coating machine for Duusteel, which has a low adhesion, it must be coated on the bottom. The bottom coating process is basically similar to the coating process. Like general paint, spray gun can be used for spraying.

  4. evaporation vacuum coating machine process The evaporation metal is aluminum, gold, etc.

  5. Surface coating/hardening treatment (if necessary)

  The metal film produced by the evaporation vacuum coating machine is quite thin. In order to use the external chemical and physical properties to protect the evaporation film, it is necessary to implement surface coating treatment (or over-coating).

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