Raw material pretreatment process of PVD coating machine for metal parts: refers to processing the mixed raw materials at room temperature or high temperature to improve the purity of the material, refine the particle size of the particles, stimulate the reactivity of the material, and reduce the sintering temperature of the material.
As shown in Figure 1-2, a cooling device for a vacuum coating machine includes a vacuum coating chamber 1 and a cooling water tank 2 and a recovery water tank 3. The side walls of the vacuum coating chamber 1 include an inner wall 4 and an outer wall 5, and the inner wall 4 and the outer wall 5 A accommodating cavity 6 is formed between the two sides of the vacuum coating chamber 1 and a plurality of tube shells 7 are arranged side by side on the inner walls 4 of both sides. One end of the tube shell 7 communicates with the outlet pipe 22 of the cooling water tank 2, and the other end is connected with the inlet pipe 21 of the cooling water tank 2. Connected, the inner wall 4 is provided with a plurality of water spray ports 8, the water spray ports 8 are in communication with the tube shell 7, one end of the containing cavity 6 is provided with a first water outlet 61, and the first water outlet 61 is connected with the recovery water tank 3. Cooling water is used to cool the vacuum coating chamber 1, because the heat mainly comes from the coating area of the vacuum coating chamber 1, so the cold water passing into the tube shell 7 can take away a lot of heat, and at the same time, the cold water in the tube shell 7 passes through the nozzle 8 enters the accommodating cavity 6, and directly sprays water to cool the side wall of the vacuum coating chamber 1 to further cool down, so as to achieve the cooling effect.
In order to make the water spray effect of the water spray port 8 better, the water outlet pipe 22 of the refrigerating water tank 2 connected to the tube shell 7 is provided with a high-pressure water pump 9, and the water spray port 8 is a high-pressure water spray head. Water can be sprayed directly onto the inner wall of the accommodating cavity 6.
In order to facilitate the quick discharge of the accumulated water in the accommodating cavity 6, the bottom of the accommodating cavity 6 is inclined, and the lower end of the bottom of the accommodating cavity 6 is provided with a first outlet 61. Avoid the accumulation of water in the accommodating cavity 6. If there is too much water, the hot cold water will not be discharged. Even if new cold water enters, the cooling effect will be greatly reduced. The positional relationship between a tube shell 7 and the first water outlet 61 is as follows:
The tube shell 7 is arranged along the length direction of the accommodating cavity 6, and the first water outlet 61 is close to one end of the tube shell 7 connected to the water inlet pipe 21 of the refrigerating water tank 2 and the first water outlet 61.
Although the water in the accommodating cavity 6 contains impurities, it can also be recycled. The recovery water tank 3 is provided with a water inlet 31 and a second water outlet 32. The water inlet 31 is in communication with the first water outlet 61, and the water inlet 31 is provided with a filter. The second water outlet 32 communicates with the water inlet pipe 21 of the refrigerating water tank 2. The filter screen can filter out impurities of the recovered water in the accommodating cavity 6 (for example, residues and debris on the inner wall 4 of the accommodating cavity 6), and then be reused.
In order to maximize the use of cold water and save the cost of refrigeration, the outlet pipe 22 of the refrigerating water tank 2 is provided with a solenoid valve 10, the vacuum coating chamber 1 is provided with a temperature sensor 11, and the temperature sensor 11 is electrically connected to the solenoid valve 10. The temperature in the vacuum coating chamber 1 can be detected by the temperature sensor 11, thereby controlling the opening size of the solenoid valve 10 and controlling the amount of cold water flowing in, so as to reduce the temperature while saving the usage of cold water.
The above descriptions are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still comment on the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
PVD coating machine for metal parts,PVD coating machine
Hello, please leave your name and email here before chat online so that we won't miss your message and contact you smoothly.