Process principle of special-shaped graphite mold impregnation

After the special-shaped graphite mold is impregnated with anti-oxidation protective agent, the liquid can penetrate deep into the pores of the graphite mold, forming an anti-oxidation protective film of about 0.02mm on the pores and surface of the graphite mold. This layer of protection can effectively isolate the air to avoid oxidation reaction, effectively resist the oxidation of the graphite mold, and prolong the service life of the graphite mold. The following introduces the process principle of special-shaped graphite mold impregnation:
1. Prepare the dipping tank according to the size and specifications of the graphite mold. The dipping tank can be made of various materials according to the actual conditions, but it needs to use acid corrosion resistance, good sealing, cannot be penetrated by liquid, has a certain hardness, and has good durability. Material.
2. Put the graphite mold into the graphite mold impregnating agent and soak for about half an hour at room temperature and normal pressure. If you need to improve the anti-oxidation effect, you can use the method of decompression impregnation to make the graphite mold impregnate and penetrate into the pores of the graphite mold Among them, vacuum impregnation requires vacuum impregnation equipment.
3. Place the cut graphite mold in a well-ventilated place to dry naturally for about 2-3 days before use.
4. If the amount of graphite mold to be processed is relatively small, you can use the method of brushing, so that you don’t need to use a tank, and you don’t need to pour a large amount of impregnation solution at one time. You only need to spread the graphite mold antioxidant evenly on the surface of the graphite mold Brush 2~ times, pay attention to slow down as much as possible when brushing, so that the impregnating liquid can penetrate into the pores of the graphite mold more fully.