Precision casting, also known as wax loss casting. The precision and complexity of precision casting products are closest to the final part shape required by users. After casting, one can choose to process or not process, and investment casting is an advanced technology with near net shape. The development of investment casting technology is very rapid and widely used both domestically and internationally. The future development trend of this technology will bring the distance between castings and components closer and closer. However, traditional precision casting is no longer suitable for the rapidly changing market as a blank. Today, the editor will continue to explain the process flow before precision casting.
After the sanding is completed, we will proceed with the baking process. We fix the wax mold onto the mold head, and the sandblasted and air dried wax mold will be heated in a dedicated metal enclosed baking box. Because the melting point of industrial wax is not high, a temperature of about 150 degrees Celsius is normal. When the wax model burns, the molten wax water formed will flow along the door, and we call this process dewaxing. The wax mold is empty, but the key to precision casting is to use an empty sand shell. Melted wax can be used multiple times, but it must be filtered through the filter wax, otherwise dirty wax will directly affect the quality of the blank surface, produce defects such as pitting, sand holes, etc., and also lead to shrinkage of precision casting products.
2. After dewaxing, the baking of the sand shell is about to begin. In order to make the sand shell more stable and powerful, when we start casting stainless steel liquid, the temperature between the sand shell and the dry and dried sand shell is much higher, about 1000 degrees Celsius, and may need to be baked in an oven.
3. After the sand shell is baked, pour the high-temperature dissolved stainless steel liquid into the wax sand shell. The stainless steel liquid will fill the space of the wax mold, including the middle mold head, until it is filled.
4. Due to the mixing of impurities of different components in boilers that dissolve stainless steel, factories must test the percentage of materials. Then, according to one's own needs, mix and release, such as adding elements that can achieve the expected effect.
5. After the stainless steel liquid enters the wax mold and solidifies, the outermost sand shell can be broken by human or mechanical tools to make it a sturdy stainless steel product. This is the shape before the wax mold, and finally the required blank. Then separate the billets one by one, roughly grind them and cut them into one billet.