Investment Casting
High-accuracy, complex, and cost-effective castings for demanding industries.
What is Investment Casting?
What is Investment Casting? | The Precision Lost Wax Casting Process
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The term “investment” originates from the process of “investing” (surrounding) a wax pattern with a high-grade refractory material to create a seamless, high-strength ceramic shell.
How the Investment Casting Process Works
The precision casting method follows a series of sophisticated steps to ensure “near-net-shape” results:
Pattern Creation: A wax replica of the final part is produced.
cURL Too many subrequests. The wax pattern is “invested” in a ceramic slurry coating. Once hardened, this forms a durable heat-resistant shell.
cURL Too many subrequests. The shell is heated to melt away the wax, leaving a perfect internal cavity.
Metal Pouring: Molten metal is poured into the pre-heated mold.
Shell Removal: After cooling, the ceramic mold is removed to reveal the final, high-precision metal component.
Key Benefits: Why Choose Precision Lost Wax Casting?
Compared to traditional sand casting or die casting, the investment casting process offers distinct competitive advantages:
Complex Geometric Capabilities: Easily produces intricate designs, thin-walled sections, and complex internal passages that are impossible with other methods.
Superior Surface Finish: Delivers a smooth, professional surface (typically Ra 3.2 or better), significantly reducing the need for secondary grinding or polishing.
High Dimensional Accuracy: Maintains tight tolerances, ensuring “ready-to-assemble” parts that minimize CNC machining costs.
Material Versatility: Compatible with a vast range of alloys, including stainless steel, carbon steel, and high-temperature superalloys.
No Size Restrictions: Suitable for everything from micro-sized medical components to large-scale industrial structural parts (up to 80kg+).
Cost-Effectiveness and Efficiency
For many industries, investment casting is the most cost-effective solution. By reducing material waste and minimizing secondary processing, it provides a high-value manufacturing route for both rapid prototyping and high-volume production.
Investment Casting Process
1. Wax Injection
2. Pattern Assembly
3. Shell Making
4. Dewaxing
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6. Roasting
7. Sell Removal
8. Shell Blasting
9. Casting Removal
10. Finishing Operation
11. Inspection & repair
12. Picking & Passivation
13. Timing & Mending
14. Machine Shop
15. CMM
Materials Used in Investment Casting
Investment casting supports a wide range of materials, each chosen for specific performance needs:
Stainless Steel Casting – Excellent corrosion resistance and strength, widely applied in medical, automotive, and industrial components.
High-Temperature Alloy Casting – Designed to withstand extreme heat, ideal for aerospace, energy, and heavy-duty equipment.
Titanium Alloy Casting – Lightweight with exceptional strength and biocompatibility, suitable for aerospace and medical implants.
Alloy Steel Casting – Combines toughness, wear resistance, and cost-effectiveness, making it a versatile choice for engineering applications.
Bronze Casting – Offers superior machinability and wear resistance, commonly used in valves, pumps, and marine hardware.
Main Equipment for Investment Casting
State-of-the-Art Investment Casting Equipment & Technology
At Vast, our facility is equipped with industry-leading machinery to ensure high precision, stable quality, and high-volume production efficiency. By integrating automation with advanced thermal processing, we deliver “near-net-shape” components that meet the most stringent aerospace and medical standards.
Our Core Manufacturing Equipment
To maintain a competitive edge in precision investment casting, we utilize a suite of specialized equipment:
Automatic Wax Injection Machines: Ensuring consistent wax pattern density and dimensional repeatability for complex geometries.
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Non-Destructive Testing (NDT): cURL Too many subrequests.
Mechanical Testing: cURL Too many subrequests.
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Reduce Lead Times: Automated processes accelerate the move from mold to finished part.
Minimize Material Waste: High-precision casting reduces the need for extensive secondary CNC machining.
Ensure Batch Consistency: Digital monitoring of every production stage guarantees that the 1,000th part is as perfect as the 1st.
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