Evaporative coating is a crystal film deposited on a solid surface by evaporation of a substance by heat. Resistance evaporation coating machine with tungsten boat (W boat) silver plating because of the need for strong power to make the silver from the solid state to the state of evaporation, so often make the silver splash out of the W boat, which will not only cause the waste of silver, but also make the workpiece black yellow and other invalid state. If the tungsten boat does not increase the power, the silver material in the tungsten boat heating time is too long will also lead to effective workpiece because of scorched and can not be used. In view of the above problems, the w-boat improvement scheme of resistance evaporation coating machine will be introduced below.
Resistance evaporation coating machine tungsten boat improved structure, including the workpiece frame base, the workpiece frame base is provided with evaporation electrode rod support, evaporation electrode rod support is connected with evaporation electrode rod, evaporation electrode rod is provided with evaporation fixture, between the evaporation fixture is provided with tungsten boat, which is characterized in: tungsten boat around molybdenum wire.
Further, the evaporation electrode rod bracket is connected with the baffle main rod, the baffle main rod rotates on the evaporation electrode rod bracket, the baffle main rod is fixedly connected with the baffle support rib, the baffle support rib is fixedly connected with the baffle, the upper baffle is connected with the evaporation electrode rod bracket by the baffle support rib and the baffle main rod rotation. Preferably, the baffle main rod is respectively provided with an upper support rod and a lower support rod, and the end of the evaporation electrode rod support is respectively provided with upper support rod and lower support rod corresponding to the upper limit and lower limit, when the baffle main rod rotates the upper support rod against the upper limit rod, the upper baffle is covered above the evaporation electrode rod support; When the baffle main rod rotates to the lower support rod against the lower limit rod, the upper baffle is separated from the evaporation electrode rod bracket cover. Preferably, the evaporation electrode rod holder is fixedly connected with a lower baffle opening towards the upper baffle.
The advantages of the scheme are as follows:
1) The added molybdenum wire can effectively avoid silver splashing out of the tungsten boat, save raw materials, and ensure the quality of the coating of the workpiece;
2) Due to the addition of molybdenum wire, the silver material can be evaporated in the shortest time, shortening the evaporation time and prolonging the service life of the tungsten boat;
3) The equipment has simple structure, low cost and strong practicabil
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