R N Technocast :: Investment Casting Manufacturers

Manufacturing Process :

Overview
Investment casting is the process we use to manufacture our complex, intricate, thin walled and tightly tolerance products. R N Technocast Pvt. Ltd. has pioneered several technological advancements that have enabled us to be the leading supplier for large and complex precision cast product. The investment casting process is a complex and involved process but it can be simplified into key steps for description purposes.

Tooling
Using state-of-the-art rapid prototyping technologies, we can reduce development lead times. Patterns can be produced from data provided to us by the customer.

In addition, gating design and casting trials can be completed while the tooling is being constructed, minimizing the lead time of the first article castings.

Using customer supplied electronic data, CAD models or blueprints, with experienced development persons, a tool that will consistently produce an acceptable part. A tool or wax die is basically the inverse of the customer's part. We inject the empty cavity of the die with specially designed wax and remove the wax pattern from the tooling. The new wax pattern is a duplication of the eventual finished casting.

Wax Assembly
Once the tooling has produced a successful wax pattern, the next step is wax assembly. Due to the size of many of the casting that we specialize, we often assemble many wax components into one large pattern.

Investing
In investing, the wax pattern is dipped into special slurry and coated with fine grain sand. This alternating slurry and sand process is repeated many times to produce a mold or "investment". The mold shell is heated in a pressurized vessel which causes the wax to liquefy and drain out of the mold, leaving only the shell. The shell is now hollow and ready to be filled with metal.

Backend Processes
We place a strong emphasis on process control throughout the foundry. All castings are heat treated to obtain required mechanical properties and undergo numerous quality checks.

Nondestructive testing utilizing x-ray, ultrasonic, and fluorescent penetrate inspection techniques certify that the casting meets the customer's quality requirements.

Coordinate measuring machines (CMM) provide statistical information to control the process and insure part conformance to the customer's dimensional requirements.