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The process flows of lost wax casting has been divided into the following major operations

Technics Design:

Once a drawing or sample of the needed casting is mailed to us, our design department will immediately analyze the product technics. According to customs’ drawing or sample, our design team will exactly compute the pouring system.

Making molds:

To approach an ideal mold for designing a casting requires a detailed study of the customer’s requirements and drawing up the best solution. The artifact’s designing, quality-benchmarking and cost-effective considerations play an important role to work out an ideal structure for metal casting. After transferring the drawing or sample into 3D drawing, it is time to make the aluminum or steel molds.

Injecting wax:

The process is mainly responsible for the production of wax molds, injecting wax into the mold to get the wax mold.

Forming tree structure:

For bulk production and improving production efficiency, wax molds are formed to tree structure according to technically designed.

Dipping:

The wax molds are dipped into silica sol or water-glass adhesives so that they can stick to the sand.

stuccoing:

Place the dipped wax molds into quartz sand, sand will be attached to the mold, then hang to dry .The whole stuccoing process should be repeated 4 to 6 times.

dewaxing:

Put the max molds with thick coat into the dewaxing machine, keep heating. The wax gets melt and lost, only the sand shell is left.

preheating shell:

Put the sand shell into the oven for preheating to strengthen the shell.

Pouring:

Melt the cast materials in the furnace, put different chemical composition per need. Then heat the materials to about 1,600 degrees, then take some molten steel and do chemical analysis before pouring . At the same time, heat the sand shell to a certain degree.If analysis approved then pour the molten steel into the sand shell, make sure the shell is filled with liquid steel and finally natural cooling.     

sand shell removal:           

Shake or beat the sand shell to make the casting free from it.

cutting:

Cut off the castings from the tree structure.

grinding:

Grinding and polishing the castings by grinding wheel or peening machine, get the ingate and defected surface of casting smooth.

heat treatment:

For good mechanical properties, do heat treatment on casting by normalizing, annealing, quenching, tempering, Q+T, contain hardening and Nitriding etc according to the material spec..

machining:

Normally, casting parts need certain finishing. To satisfy the dimension tolerance or form geometric shapes, machine the casting by CNC.

final test:

Using impact tester, tension tester, hardness tester, take NDT & DT with X-Ray test the casting’s mechanical behavior.For final product, using CMM do the inspection.

packing & delivery:

Before the transportation, the casting will be done rust prevention, then packed into iron or plywood case. Make transportation according to customer’s request.