China Precision Casting Parts Manufacturer
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:
Firstly, according to the product requirements, the mold is designed and manufactured (the residual amount is very small or the remaining amount is not left), and the wax is cast by the casting method to obtain the original wax mold; Repeat the coating and sanding process on the wax mold, harden the shell and dry; The inner wax mold is dissolved, and the wax is removed to obtain a cavity; Calcined shell to obtain sufficient strength; Pouring the required metal material; After the shelling, the sand is cleared to obtain a high-precision finished product. Heat treatment and cold working according to product requirements.
(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.
Investment casting process
The precision casting production process can be roughly divided into waxing, shelling, pouring, post-treatment and inspection.
Pressing wax includes waxing, waxing, and grouping.
The shell includes hanging sand, hanging pulp, and air drying.
Pouring includes roasting, chemical analysis (spectral spectroscopy), casting, shaking shells, gates, and gates.
Post-treatment includes sand blasting, shot blasting, correction, and pickling.
The inspection includes wax inspection, initial inspection, intermediate inspection and finished product inspection.