Vacuum coating equipment, aluminum plating process, common problems, vacuum unit operation check points?
Vacuum Coating Machine Vacuum aluminum plating is to heat and melt the aluminum metal to transpiration under vacuum. The aluminum atoms condense on the surface of the polymer material to form an extremely thin aluminum layer. Vacuum aluminum plating requires the substrate to be lubricated, flat and uniform in thickness; the stiffness and friction coefficient are appropriate; the external tension is greater than 38Dyn/Cm2; the thermal performance is good, and the heat radiation and condensation heat of the transpiration source can withstand the effect; Less than 0.1%. Commonly used aluminized substrates are polyester (PET), polypropylene (PP), polyamide (PA), polyethylene (PE), polyvinyl chloride (PVC) and other films. * Vacuum coating equipment * What are the common problems with aluminum plating technology?
1. Holes appear in the film when aluminized
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the reason:
1 The aluminum material in the steaming boat is too full. Solution: reduce the speed of sending aluminum; improve the current of steaming boat.
2 There is a short circuit between the steaming boats in the vacuum chamber. Solution: Remove 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 properly reduce the tension.
2 The cooling system works abnormally. Solution: Check the cooling system and remove the fault.
What are the key points for the operation of the vacuum unit?
What are the key points for the operation of the vacuum unit? The vacuum unit needs to be inspected by professional technicians during the work, then the main points of the vacuum unit operation check include:
1. It is necessary to ensure the normal entry and exit of circulating cooling water during work;
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2. The acoustic response of the vacuum unit is uniform during the operation, there is no noise and there is no irregular abnormal vibration during the operation.
3. Pay attention to the motor load and the temperature rise of each part of the pump. Under normal conditions, the maximum temperature rise of the vacuum pump must not exceed 40 °C, and the maximum working temperature should not exceed 80 °C.
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4. In the course of work, if there is any oil leakage, the work should be stopped immediately, and the inspection and repair should be carried out after the pressure is released. It is not allowed to continue the work or the bag pressure for maintenance after the oil leakage is found.