Investment casting, also known as lost-wax casting, is a high-precision metal forming technique that produces complex metal parts with exceptional dimensional accuracy, excellent surface finish, and minimal material waste.
At Langhe Casting, we provide professional investment casting services with a focus on quality, cost-efficiency, and customer-specific customization. Our engineering expertise supports a wide range of industries—from aerospace and defense to automotive and energy.
The investment casting process follows a detailed series of steps. Each step contributes to the accuracy, consistency, and performance of the final metal part.
| Step | Description |
|---|---|
| 1. Wax Injection | Wax patterns are created using precision molds. |
| 2. Pattern Assembly | Wax patterns are assembled into a casting “tree.” |
| 3. Shell Building | Multiple ceramic layers are built around the wax pattern. |
| 4. Dewaxing | Wax is melted and drained from the ceramic shell. |
| 5. Shell Firing | The ceramic shell is sintered at high temperature for strength. |
| 6. Metal Pouring | Molten metal is poured into the hot ceramic mold. |
| 7. Cooling | The metal solidifies while maintaining fine detail. |
| 8. Shell Removal | The ceramic shell is broken off to reveal the metal part. |
| 9. Finishing | The part is cut, cleaned, and optionally machined or heat-treated. |
This end-to-end process allows for intricate shapes, tight tolerances, and excellent repeatability.
Investment casting is chosen when design complexity, dimensional precision, and surface quality are critical. At Langhe Casting, our customers benefit from:
| Advantage | Description |
|---|---|
| Superior Accuracy | Tolerances as tight as ±0.1 mm |
| High Surface Finish | Ra as low as 3.2 µm, reducing or eliminating machining |
| Complex Geometries | Hollow parts, fine details, and internal channels possible |
| Wide Material Compatibility | Casts include stainless steel, aluminum, superalloys, and more |
| Low to Medium Volume | Economical for small batches, prototypes, or niche parts |
| Waste Reduction | Near-net shape minimizes post-processing and raw material loss |
Langhe Casting works with a wide variety of ferrous and non-ferrous metals. Selection depends on mechanical strength, temperature resistance, and corrosion resistance.
| Alloy Type | Properties | Application Examples |
|---|---|---|
| Stainless Steel | Corrosion resistance, strength | Valves, pumps, surgical instruments |
| Carbon Steel | Toughness, affordability | Machinery, structural parts |
| Aluminum Alloys | Lightweight, corrosion-resistant | Aerospace, automotive |
| Superalloys | High temp resistance, durability | Gas turbines, jet engines |
| Copper Alloys | Conductivity, wear resistance | Electrical, decorative parts |
We offer material selection support based on the application, environment, and regulatory requirements.
Investment casting plays a vital role in multiple sectors. Langhe Casting produces components used globally in critical and high-performance applications.
Aerospace – turbine blades, landing gear, structural parts
Automotive – turbocharger components, brackets, gear housings
Medical – orthopedic implants, surgical tools
Oil & Gas – valves, impellers, pipe fittings
Defense – firearm components, armor brackets
Marine – propellers, housings, shaft supports
Industrial Machinery – gearboxes, linkages, bearing housings
Understanding how investment casting compares to other methods helps in choosing the right process.
| Feature | Investment Casting | Sand Casting | Die Casting |
|---|---|---|---|
| Complexity Support | ✅ High | ⚠️ Moderate | ❌ Low |
| Surface Finish (Ra) | 3.2–6.3 µm | 12.5–25 µm | 1.6–3.2 µm |
| Dimensional Tolerances | ±0.1 mm | ±1.0 mm | ±0.2 mm |
| Tooling Cost | Medium | Low | High |
| Production Volume | Low–Medium | Medium–High | High |
| Material Variety | High | High | Limited |
Langhe Casting helps clients evaluate options and choose the most efficient, cost-effective process.
Langhe Casting is not just a foundry—we are a strategic manufacturing partner. Here’s what sets us apart:
✅ Advanced Technology: CAD/CAM, simulation, and 3D wax pattern modeling
✅ Quality Assurance: ISO 9001 certified, with full traceability and NDT testing
✅ Customization Support: From prototyping to full production runs
✅ Global Export Experience: Reliable logistics and documentation
✅ Engineering Expertise: Decades of casting knowledge across sectors
We serve OEMs, industrial manufacturers, and engineering firms worldwide.
We achieve dimensional tolerances of ±0.1 mm, and sometimes better, depending on part geometry.
We handle parts from 10 grams up to 100 kg, with customizable mold sizes.
Absolutely. Investment casting is ideal for prototyping and low-to-medium-volume production.
We offer as-cast finishes, machined surfaces, and coatings like passivation, anodizing, and powder coating.
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