Machining Processes and Techniques

Fine mechanical machining can be categorized into upper-and-lower cavity die methods and is typically accomplished through a combination of processes including planing, milling, etching, turning, and electrical discharge machining. The dimensions and pit shapes of fine mechanical machining are consistent with those of the product’s edge profile. When selecting materials for this process, since wax patterns are primarily used in industrial wax molding, it’s important to choose aluminum alloy molds that have a relatively low melting point and moderate hardness. These molds are also cost-effective and lightweight, making them ideal for such applications.

After the first two sandblasting operations have been completed and allowed to air-dry naturally, proceed sequentially with the third, fourth, fifth, and subsequent sandblasting operations. Then, adjust the number of sandblasting cycles accordingly based on factors such as the part’s size, surface requirements, and self-weight. In general, the number of sandblasting cycles ranges from 3 to 7.

During fine mechanical processing, multiple wax molds already fixed on the mold base are coated with industrial adhesive and then evenly sprayed with a fine layer of sand. This sand has very small and fine particles, ensuring that the surface of the blank is as smooth as possible. After the sandblasting is completed and the wax molds have been allowed to air-dry naturally, industrial adhesive is applied again to the surface of the wax molds during use. Then, another layer of sand is sprayed on top—this time with larger and coarser particles than the previous layer. Once spraying is finished, the wax molds are left to air-dry naturally at a set constant temperature.