#Precision casting is a casting method relative to the traditional casting process. It can obtain relatively accurate shape and high casting precision. The more common practice is: first design and manufacture a mold according to the product requirements (with very little or no margin), cast wax by #casting, and obtain the original wax mold; repeat the coating and sanding on the wax mold Process, hardening the shell and drying; then melt the internal wax mold to dewax and obtain the cavity; bake the shell to obtain sufficient strength; pour the required metal materials; High precision finished product. According to product needs or heat treatment and cold working.
Investment casting process design
Like general #casting process design, the tasks of investment casting process design are:
(1) Analyze the manufacturability of the casting structure;
(2) Select a reasonable process plan, determine the relevant casting process parameters, and draw the casting diagram on the basis of the above;
(3) Design the pouring system and determine the module structure.
When considering the above three aspects, the main basis is still the basic principles of the general casting process, especially when determining the process plan and process parameters (such as casting fillet, draft angle, #machining allowance, process ribs, etc.), Except the specific data is slightly different due to the technological characteristics of investment casting, the design principle is exactly the same as that of sand casting.