In the field of investment casting, QD is an expert in the lost wax casting process. We specialize in providing customized investment casting solutions.

The first step in lost wax casting: drawing design communication
Drawing design is the foundation of casting. QD has established a standardized communication process to ensure that no detail is overlooked:
- In-depth listening: QD’s technical team proactively connects with customers. Through phone calls and online meetings, they gain a comprehensive understanding of key information such as the product’s intended use, performance requirements, and dimensional specifications.
- Professional drawing analysis: After receiving preliminary drawings, QD’s professional team will conduct a detailed assessment based on casting process feasibility and structural rationality. Provide professional modification suggestions.
- Solution collaborative optimization: Multiple rounds of communication and adjustment are supported. QD patiently collaborates with customers on everything from structural details to process selection until the optimal design is determined.

Lost Wax Casting Step 2: From Wax Pattern to Casting
Once the design is finalized, the core phase of lost wax casting begins. From wax pattern to casting, every step of the process reflects QD’s dedication to precision. The specific process of investment casting is as follows:
Process Name | Core Function | Key Operations |
Wax Pattern Making | Lay the foundation shape for castings | Make patterns with high-precision equipment according to drawing parameters. Inspect dimensions and finish. |
Tree Assembly | Optimize pouring efficiency | Weld wax patterns onto sprue bars as planned. Form wax pattern assemblies. |
Multi – layer Shell Making | Form the “mold” for casting formation | Dip wax pattern assemblies into refractory coating, sprinkle refractory sand. Repeat operations to form multi – layer solid shells. |
Dewaxing Treatment | Obtain hollow shells | Melt out wax patterns in a high – temperature environment. Retain shell cavities. |
Shell Baking | Improve shell performance | Remove residual impurities and moisture. Enhance shell strength and air permeability. |
Metal Pouring | Complete casting formation | Pour molten metal at precise temperature and speed. Cool and solidify. |
From the meticulous production of wax patterns to the precise pouring of molten metal. QD fully controls the quality of each process. Ensure process stability throughout.

Lost Wax Casting Step 3: Post-Processing Surface Treatment
After the casting is formed, QD proceeds to the next step: surface treatment. We use multiple processes to enhance the product’s quality and performance. Ensure the casting is in optimal condition:
First, we perform basic cleaning. We remove mold remnants, sprues, risers, and other excess material from the casting surface. Give the casting a clean, initial appearance.
Next, we perform grinding and polishing. Depending on the requirements, we use abrasives of varying grit sizes to finely treat the surface. Achieve a smooth and even finish.
For products with special requirements, we also perform surface strengthening processes:
- Sandblasting increases surface roughness. Improve the adhesion of subsequent coatings.
- Electroplating forms a metal coating on the surface. Enhance corrosion resistance and decorative properties.
- ……

Finally, our QD team conducts a comprehensive inspection of the surface-treated castings. Ensure that every product meets quality standards.
Choose QD. A Professional Partner
QD always approaches every aspect of our partnership with professionalism. We not only provide precision casting products, but also offer comprehensive technical support and customized solutions.
If you have lost wax casting needs, please feel free to contact QD!
FAQ
1. What information do I need to provide for investment casting with QD?
You only need to provide a product drawing (or 3D model) and basic information such as the product’s intended use, performance requirements, and dimensions.
2. Is wax pattern making important in investment casting?
Yes. The wax pattern serves as the “prototype” for the casting. Its accuracy directly impacts the quality of the final casting. QD ensures the quality of wax patterns using high-precision equipment and rigorous quality inspections.
3. What effects can casting surface treatment achieve?
Surface treatment can improve the smoothness and corrosion resistance of castings. Sandblasting, electroplating, and other processes can also be used to meet different performance or decorative requirements.
4. How long does it take from drawing consultation to finished product delivery?
The specific timeframe depends on the complexity and requirements of the product. During the initial phase of the collaboration, our technical team will provide a rough estimate based on your drawings.
5. Do you have special performance requirements for your castings? Can QD meet them?
Yes, we can. From the design stage, we’ll recommend the appropriate process based on your performance requirements. We provide customized solution support throughout the entire process.