Operating Procedure of Tungsten Heater for Aluminum Plating Machine - Power Control

Tungsten heater is used as a heating element in aluminum plating machine for aluminum film. Aluminum machine operation begins with the power supply.

Firstly, open power supply, turn on each cycle valve, cooling vacuum system, and open the maintain pump to pre-vacuum pumping for diffusion pump for 30 minutes, heated diffusion pump about 1 hour and vacuum aluminizing.

Cleaning up the operation vehicle, and then placing tungsten heater, molybdenum wire magnesium fluoride, two tin board, and put aluminum workpieces. Put the operation vehicle into the room, close the door, and open mechanical pump. 5-7 seconds later, open the pre-pumping valve F2, open composite vacuum gauges, there are two screens of high and low vacuum, on the vacuum gauge. When the low vacuum gauge displays 4.0E-0, close pre-pumping valve F2, pre-opening valve F3, and open the high vacuum valve F1. When the high vacuum valve shows 4.0E-2, open the work vehicle, and adjust the voltage in the 50V-70V. After the rotation is normal, open FK3 valve flow indicator, turn off a high vacuum flapper valve, and control high vacuum table. When it shows 4.0E-0, open bombardment power and adjust voltage between 800V-1200V to clean ion for 5 minutes. Turn off the bombardment power and rotated power, FK3 valve. Close flow indicator, open high vacuum baffle valve for creation of vacuum. After high vacuum table shows 2.0E-2, it is time to vacuum aluminizing.

If the time for vacuum aluminizing stay for too long, it would cause that the tungsten wire would direct baked aluminum layer of tungsten surface, and then it would be oxidation and become yellow. The quality of aluminum film also influenced by the quality of vacuum, the stable process parameters, subsidiary materials for aluminizing, the storage time of aluminizing workpiece. If the cleaning of coated article is not complete, its surface would have residual cleaning agents and water.

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