What are the common problems in the aluminum plating process of vacuum coating equipment?
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What are the common problems in the aluminum plating process of vacuum coating equipment?
There are some common problems in the aluminum plating process of vacuum coating equipment. Vacuum coating aluminum is vacuum-melted, aluminum metal is heated and melted to evaporation, and aluminum atoms are condensed on the surface of the polymer material to form a very thin aluminum layer. Vacuum aluminum plating requires smooth, flat and uniform thickness of the substrate; proper stiffness and friction coefficient; surface tension greater than 38Dyn/Cm2; good thermal performance, can withstand the heat radiation and condensation heat of the evaporation source; Less than 0.1%. Commonly used aluminized substrates are polyester (PET), polypropylene (PP), polyamide (PA), polyethylene (PE), polyvinyl chloride (PVC) and other films. What are the common problems in the aluminum plating process of vacuum coating equipment? 1. Holes appear in the film when aluminizing
the reason:
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1 The aluminum material in the evaporation boat is too full. Solution: Reduce the speed of aluminum feeding; increase the evaporation boat current.
2 A short circuit occurs between the evaporation boats in the vacuum chamber. Solution: Eliminate the short circuit.
3 vacuum room impurity splash
2, the film appears tensile phenomenon when aluminizing
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the reason:
1 The substrate tension is too large. Solution: Adjust the unwinding and take-up tension control system to reduce the tension properly.
2 The cooling system is malfunctioning. Solution: Check the cooling system and troubleshoot.