Casting Process

Complete overview of our investment casting (lost-wax) production process.

Investment casting process wax pattern assembly engineering overview

Wax Pattern Production

Our wax injection facility produces precise wax patterns using aluminum tooling. We use semi-automatic wax injection machines with temperature and pressure control to ensure dimensional consistency. Pattern assembly (tree building) is performed by skilled operators following standardized procedures.

  • Wax injection temperature: 58-65°C
  • Injection pressure: 3-12 bar
  • Pattern accuracy: ±0.05 mm
  • Automatic wax recycling system
  • Pattern storage in climate-controlled room
Investment casting process ceramic shell pouring and production control

Ceramic Shell Building

The ceramic shell is built by alternating dipping in ceramic slurry and stuccoing with refractory sand. We apply 6-8 layers to create a shell strong enough to withstand metal pouring. Controlled drying between layers is critical for shell integrity.

  • Primary coat: zircon flour + colloidal silica
  • Backup coats: mullite/alumina sand
  • 6-8 coating layers total
  • Controlled humidity drying (50-60% RH)
  • Shell thickness: 6-10 mm
Alloy steel casting grades for high-temperature investment cast applications

Metal Pouring & Finishing

After dewaxing in our autoclave, shells are preheated to 1000-1100°C and filled with molten alloy. We use induction furnaces with argon protection for reactive alloys. Post-casting operations include knockout, cut-off, grinding, and heat treatment.

  • Induction melting: 250 kg and 500 kg furnaces
  • Pouring temperature monitoring with pyrometer
  • AOD refining for stainless and duplex
  • Heat treatment: solution, aging, normalizing, Q&T
  • Shot blasting and surface grinding
Contact Engineering Team

Start Your Casting Project

Send drawings or specifications — our engineering team responds within 24 hours with a detailed quote.