What is Precision casting

Update:28 Feb 2019
Summary:

Precision casting is a casting method compared to conve […]

Precision casting is a casting method compared to conventional casting processes. It achieves relatively accurate shape and high casting accuracy. The more common practice is to first design and manufacture the mold according to the product requirements (there may be a very small amount or leave no margin), cast the wax by casting method, and obtain the original wax mold; repeat the coating and sanding on the wax mold. The process, hardening the shell and drying; then dissolving the inner wax mold, for dewaxing, obtaining a cavity; roasting the shell to obtain sufficient strength; pouring the required metal material; sanding after shelling, thereby obtaining High precision finished product. Heat treatment and cold working according to product requirements.
Investment casting precision casting process design.
As with general casting process design, the task of investment casting precision casting process design is:
1. Analyzing the processability of the casting structure.
2. Selecting a reasonable process plan, determining the relevant casting process parameters, and drawing a casting drawing on the basis of the above.
3. Design the pouring system to determine the module structure.
When considering the above three aspects, the main basis is still the basic principle of the general casting process, especially when determining the process plan and process parameters (such as casting fillet, mode inclination, machining allowance, process ribs, etc). Except for the specific data, the design principle is the same as that of sand casting because the process characteristics of investment casting are slightly different.