Custom Investment Casting
Investment casting (lost-wax casting) is a precision process for producing complex metal parts with excellent surface finish and accuracy. It is suitable for intricate geometries and is widely used in automotive, aerospace, medical, and industrial applications, especially for low to medium-volume production.
2.Process & Capability
Wax patterns are coated with ceramic molds, then melted out to create cavities for molten metal. After casting, parts are cleaned, cut, and can be CNC machined for tighter tolerances and critical features.
3.Quality Control
We inspect for casting defects, monitor machining dimensions, and ensure final accuracy through strict visual and dimensional inspection under quality standards.
Custom Investment Casting – Precision Metal Parts for Complex Geometries
Custom Investment Casting and CNC cutting are what Shenzhen Ruiyihang Technology Co., Ltd does best for making complicated metal parts. With more than 9 years of experience making things and engineers with an average of 15+ years of experience in the field, we can deliver precision cast parts with errors as low as 0.02 mm after secondary cutting. Our engineering-driven method includes talking to you directly one-on-one to make sure that your ideas are the best they can be for making them. We support quick development and can make samples in as little as three days for simpler shapes. We can go from making a prototype to mass production without any problems because we can do 100% custom OEM/ODM.
What Is Investment Casting?
Lost-wax casting, which is another name for investment casting, makes very detailed metal parts that would be hard or expensive to machine from solid stock.
The process starts with a mould of your part made of wax. We cover this design with clay to make a mould that is rigid. We melt out the wax, leaving an exact hole, after the pottery hardens. This hole is filled with molten metal, which then hardens into the final shape you want.
This method works great when you need complicated interior pathways, thin walls, or complicated outside shapes. You get parts that are almost in the shape of a net with little waste.
We use secondary CNC processes like cutting, drilling, and threading on parts that need more precise control.
Materials & Specifications
| Item | Specification |
|---|---|
| Process | Investment Casting → CNC Machining (if secondary processing required) |
| Material | Stainless Steel, Carbon Steel, Aluminum, Copper, or per Customer Request |
| Tolerance | ±0.05 mm or per Drawing (secondary machining can reach ±0.02–0.03 mm) |
| Surface Roughness | Ra 1.6–3.2 μm (depending on finish) |
| Surface Finish | As-Cast, Machined, Polished, Sandblasted, or Powder Coated |
| Size | According to Customer Drawing |
| Drawing Format | PDF / DWG / STEP / IGS |
| Production Volume | Prototype to Mass Production |
| Feature | Complex geometries, high dimensional accuracy, intricate internal cavities |
| Inspection | Incoming Material Inspection, In-Process QC, Final Inspection, Compliance with ISO 9001 / IATF 16949 standards |
| Additional Services | Plating, anodizing, powder coating, salt spray testing reports available upon request |
Why Choose Our Investment Casting Service?
Engineering-First Collaboration
Our engineers review your drawings directly—no intermediaries. We provide practical recommendations on material selection, structural design, dimensional tolerances, and surface finishing before production begins. This reduces errors and shortens your development cycle.
Fast Turnaround & Flexibility
After drawing review, you receive a quick quotation. Sample production typically completes within seven days, with simple parts ready in as little as three days. We handle both small-batch orders and volume production with the same attention to detail.
Integrated Casting & Machining
We combine Custom Investment Casting with in-house CNC capabilities. This integrated approach lets us hold tighter tolerances on critical features while maintaining the cost advantages of near-net-shape casting. General casting tolerances range from ±0.1 mm to ±0.3 mm, and secondary machining tightens this to ±0.02–0.05 mm where you need it.
Quality Assurance
We inspect castings for porosity, inclusions, and surface defects. During machining, we monitor critical dimensions continuously. Final inspection includes dimensional measurement and visual checks. All raw materials come with certification, and we follow international standards including FDA compliance for food-contact applications.
If quality issues arise within the same month, we arrange remanufacturing within one week and cover shipping costs.
Global Logistics
We offer fast door-to-door delivery, optimized especially for small-batch orders. Duties and shipping can be bundled for your convenience.
Applications
Investment cast parts are used in many fields, including:
- Automotive: Valve bodies, gearbox housings and engine parts
- Space: Turbine blades, structural fittings, and sensor parts
- Medical devices include surgical tools, implant housings, and parts for testing equipment.
- Pump housings, valve bodies, and mechanical connections are examples of industrial equipment.
- Fittings and links that are FDA-compliant for food processing
FAQ
Q: When is investment casting used?
Investment casting produces precise metal pieces with elaborate forms and delicate details.
Q: What materials may be investment cast?
Depending on the use, stainless steel, carbon steel, alloy steel, and others are used.
Q: Can you make bespoke parts?
Our parts are fully customisable to your designs or CAD files.
Q: How much tolerance is possible?
Standard casting tolerances are ±0.1 to ±0.3 mm. Secondary CNC machining yields ±0.02–0.05 mm on essential dimensions.
Q: Do you handle both prototypes and production runs?
Absolutely. From prototypes to mass manufacturing, we apply the same rigorous rigour.
Q: How long does production take?
Simple parts are ready in three days, whereas samples take seven. We'll give a production timeframe after assessing your designs based on complexity and volume.
Q: Which surface finishes are available?
Machined surfaces, polishing, sandblasting, powder coating, plating, and anodising are available. Request salt spray test results.
Contact Us
Ready to Start Your Project with Custom Investment Casting? Send your drawings or project requirements to bill@bldmachining.com and our engineers will respond promptly with solutions tailored to your needs.
