Operating Procedure of Tungsten Heater for Aluminum Plating Machine - Tungsten Wire Installation

Tungsten heater has a high melting point and high corrosion resistance, so it is widely used in vacuum aluminizing industry. Aluminum plating machine is to use electron beam to heat evaporation material which is going to be heated under vacuum, and then the material would evaporate and condenses to form the film. Operators should pay attention to some details when the tungsten wire is being installed.

Tungsten wire should be placed in parallel, and the screw should be locked-in without any loosen, under (if heating in the case of non-parallel of tungsten, after the aluminum melt, it flow to the high, leading to the splashing or crystalline of tungsten cannot be used. And the fastening screws will cause evaporation current instability, leading to splash, or blown tungsten heater). When placing molybdenum wire, openings of it should be tighten up a little inclined, (the incline is to avoid dealuminizing of abscission of material when magnesium fluoride is put in the molybdenum wire). The tin board should be new, clean, smooth, and without ant tilt at the hem, (after using, tinfoil would change color, and the electric shock part is lackluster, if it is still to be used, which cannot achieve the effect of ion bombardment, resulting in workpiece cannot absorb aluminum and influence the dealuminizing, tin board with folding would affect ion bombardment).

When install the hanger, screws should be tighten so that the hanger would not drop to influence aluminizing when the machine is turning. Do not touch the aluminized side of workpiece when placed on the it (to avoid producing yellow or black artifacts after aluminizing because of fingerprints, oil of gloves and sweat. Even if there is no such phenomenon, it will also affect the dealuminizing). The workpiece placed on the hanger should be tighten so as not to fall off and affect aluminizing or scratch other artifacts.

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