Precision casting refers to the general term for the process of obtaining precise size castings. Compared with the traditional sand casting process, the castings obtained by precision casting are more accurate in size and have better surface finish. It includes: investment casting, ceramic casting, metal casting, pressure casting, lost foam casting.

Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the part. It can be used directly without processing or with little processing.

It includes: investment casting, ceramic casting, metal casting, die casting, lost foam casting.

Among them, investment casting is more commonly used, also known as lost wax casting: choose suitable investment materials (such as paraffin) to make investment; repeat the process of dipping refractory paint and spreading refractory sand on the investment to harden the shell and Drying; then melt the internal investment to obtain a cavity; bake the shell to obtain sufficient strength, and burn off the residual investment material; pour the required metal material; solidify and cool, and remove the sand after shelling, Thereby a high-precision finished product is obtained. Heat or cold work and surface treatment as required by the product.

Process flow

Wax pressing (wax injection to make wax mold)---repair wax---wax inspection---group tree (wax module tree)---shell making (first dip in slurry, sprinkle sand, and then dip Slurry, final mold

Shell air-drying)---dewaxing (steam dewaxing)-------mould roasting--chemical analysis--pouring (casting molten steel in the mould)---vibration shelling- --

Casting and casting rod cutting and separation---grinding gate---initial inspection (raw embryo inspection)---shot blasting cleaning---machining---polishing---finished product inspection ---Inbound

The casting production process is generally like this. Generally speaking, it can be divided into wax pressing, shell making, pouring, post-processing, and inspection

Press wax includes (press wax, trim wax, group tree)

Wax pressing---use wax pressing machine to make wax mold

Repair wax---correct wax mold

Group tree---group the wax mold into a tree

Shell making includes (hanging sand, hanging pulp, air-drying)

Pouring includes (roasting, chemical analysis also called spectrum, pouring, shell shock, gate cut, gate grinding)

Post-processing includes (sand blasting, shot blasting, correction, pickling)

Inspection includes (wax inspection, initial inspection, intermediate inspection, finished product inspection)