Investment Casting Reduces Machining Costs
What Is the Lost Wax Casting Process?
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November 2, 2025
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The lost wax casting process, also known as investment casting, is a highly precise manufacturing technique that dates back thousands of years yet thrives in today’s modern engineering world. It enables manufacturers to create components with exceptional accuracy, thin walls, and intricate geometries — impossible to achieve through traditional casting methods.
Why Lost Wax Casting Still Relevant Today?
Despite evolving manufacturing technologies, lost wax casting remains the go-to process for industries where dimensional precision and superior metallurgical properties define performance.
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Step-by-Step Breakdown of the Process
At Uni Deritend, the process combines time-tested methods with robotic automation and digital simulation for unparalleled repeatability and quality.
- Wax Pattern Creation: Wax replicas of the final component are crafted using high-precision dies.
- Shell Building: Each pattern is dipped into a ceramic slurry and coated with fine sand. Robotic shelling ensures uniform thickness and consistency.
- Dewaxing and Preheating: The wax is melted out, leaving a clean, hardened shell ready for pouring.
- Metal Pouring: Molten metal is poured into the preheated mold under strict temperature control to maintain microstructure quality.
- Finishing and Inspection: Components undergo heat treatment, machining, and non-destructive testing (NDT) for dimensional accuracy and integrity.
- Knockout and Cleaning: Once solidified, the shell is removed, revealing a near-net-shape casting.
- Wax Pattern Creation: Wax replicas of the final component are crafted using high-precision dies.
Why Uni Deritend Excels in Lost Wax Casting
Founded in 1977, Uni Deritend combines deep metallurgical knowledge, simulation-based validation, and automated production systems to deliver superior performance across global industries.
Key Advantages:
- Digital Simulation: Predicts flow, shrinkage, and defects before pouring.
- Robotic Shelling: Enhances consistency and repeatability.
- Comprehensive Testing: Includes radiography, ultrasonic, and dye-penetrant inspection.
- Material Expertise: Stainless steels, nickel alloys, duplex steels, and aluminum.
- End-to-End Manufacturing: From design to delivery under one roof.
Applications Across Industries
The lost wax process is the backbone of several industries where precision and reliability are paramount.
- Aerospace: Turbine blades, brackets, and housings designed for high-temperature endurance.
- Defense: Weapon system and armored vehicle parts meeting DGQA standards.
- Automotive: Lightweight turbocharger and transmission components for improved efficiency.
- Oil & Gas: High-pressure valve and pump castings resistant to corrosion and wear.
- Power Generation: Impellers and diffusers designed for energy efficiency and longevity.
Benefits of the Lost Wax Casting Process
- Dimensional Accuracy: Achieves tolerances up to ±0.1 mm per 25 mm.
- Excellent Surface Finish: Minimal need for machining.
- Complex Designs: Ideal for components with intricate shapes.
- Material Versatility: Works with a wide range of alloys.
- Cost Efficiency: Reduces material waste and machining time.
- Sustainability: Wax reclamation and energy-efficient furnaces.
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Advanced Manufacturing & Process Innovation
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Frequently Asked Question on Lost Wax Casting Process
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