Wax Injection
Molded wax patterns from the single or multi-cavity tools create an assembly or cluster of the tree assembled proceeding wax runners having wax-made pouring cups, tie-bar and necessary handling arrangements to provide manual or robotic coating. The designing of wax assembly is among the most precise and significant stages of the procedure, backed by our highly experienced engineering team.
Wax Pattern Assembly
The individual wax patterns are assembled on to a wax Spare to form a mold or tree/cluster. The number of patterns are assembled per tree varies, dependent upon the size, weight and configuration of a given part.
Shell Building
The shell building technique involves dipping the assembly into a ceramic slurry and then into a bed of extremely fine sand. After drying, the process is repeated. Up to 4 to 6 layers may be applied in this manner. All Shell dried in Air Conditions in close range of temp. (22 – 26º C) & Humidity. We also used Organic Fiber in secondary slurry bath to reduced cycle time and no. of coats. It also helps in improvement of permeability of shells.
Dewax Operation
Completed shell is placed in a steam autoclave where the pattern melts and runs out through the gates and pouring cup. Auto clave dewaxing operation maintain quality of wax compare to convensonal dewaxing process.
Shell Pre Heating
After removal of the wax, the hollow shell is all set for firing that the pre-heats in the shell help furnace at higher temperature to trash the shell, removing all the residual traces for wax as well as pre-heat to pour,usually in the range of 800 to 1100 degrees centigrade.
Metal Pouring
Severe control over shell backing temperature as well as cooling rates are among the significant factors to make sure investment casting integrity and metal purity. Having melted as well as de-gassed the melted metal, a pre-heated shell reaches the necessary level with required solidify.
Cut Off
Then, the cast parts are removed from a runner system through cut-off wheels or predictable engineering techniques.
Finishing
After negligible finishing appearance achieved using different blasting methods and chemical procedure, the metal casting (same like the original wax pattern) is all set for the shipment to our customer.
Casting Inspection
Each & every stage of the process is followed with Traceability and Routine Inspection according to the Activity Charts.
Machining
