Custom Investment Casting Manufacturer
Investment Casting Manufacturer for Precision OEM Parts
Supro MFG is a China-based investment casting foundry producing precision lost-wax castings in 250+ alloys — from wax pattern and ceramic shell through machining, finishing and inspection. We review your drawing, alloy, tolerance and application before quoting, so the casting route fits the part, not the other way around.
Silica sol and water glass processes, ±0.15 mm as-cast tolerance, Ra 3.2 surface finish, and full material and dimensional reports for OEM buyers.
Investment Casting at a Glance
- Silica sol & water glass lost-wax casting
- Stainless, carbon/alloy steel, aluminum & copper — 250+ alloys
- ±0.15 mm tolerance · Ra 3.2 · casting weight 10 g–80 kg
- In-house CNC machining, heat treatment & finishing
- CMM, spectrometer, X-ray & NDT inspection reports
Metal Die Casting
Investment casting
Sand Casting
Custom Molds Making
Precision CNC Machining
metal investment casting foundry
Investment casting is one of the most important casting processes of Supro metal casting foundry, with a complete internal foundry workshop, from product design, mold design, mold processing, precision casting, cnc machining, quality inspection, packaging and transportation, etc. one-stop On-demand manufacturing services.
Our fonderie à cire perdue process includes: Water Glass Investment Casting and Silica Sol Investment Casting, applied in different product designs and cost constraints, to create precise, complex and smooth surface casting parts, closer to the final application shape, reduce precision CNC machining the cost of.
Supro Metal foundry has 25 years of casting experience, whether it is precision casting prototypes, large casting parts, mass casting or casting parts with complex structures, we can rely on professional fonderie de métaux technology and advanced casting equipment to meet your needs, on time Delivery of high quality cast parts.
Investment Casting Processes
Four Investment Casting Routes for Different Parts
The right process depends on part size, surface requirement, geometry and cost target. We match the route to your part rather than pushing every project down one line.
Silica Sol Investment Casting
Silica sol investment casting is a casting process that is widely used in stainless steel and alloy steel casting parts. Silica sol is used as a binder to build a ceramic shell on the outer surface of the wax mold. It has the characteristics of high precision (CT4~CT6) and good surface finish. The foundry field plays an important role.
Supro MFG is a professional investment casting companies, we utilize silica sol casting for casting parts such as high temperature heat resistant alloys, heat resistant steels, stainless steels, carbon steels, low alloys, aluminum alloys and copper alloys.
Water Glass Investment Casting
Water glass investment casting is a casting process in which water glass is used as a binder to wrap the ceramic shell of the wax mold. The accuracy is better than that of sand casting, but the surface finish is poor. It is suitable for parts with heavy weight or no strict requirements on the external surface. .
At Supro MFG, we rely on water glass investment casting with low material cost and high forming efficiency for part casting of heavier or stronger products with more complex shapes. Such as: agricultural machinery, gears, large bases, and civil engineering components.
DLP 3D printed wax investment casting
3D printing wax investment casting is an advanced casting process that fills the gap. It can quickly build SLA models through 3D printing technology to meet the casting needs of small batches, high precision and low cost, reduce the investment in molds and production cycles, and increase the demand for rapid prototyping and production. Small batch casting brings huge economic benefits.
As an advanced investment casting company, Supro MFG provides high-precision SLA 3D model casting services, providing cost-effective metal casting solutions for casting prototypes and small batch castings. Such as: precision gears, jewelry, models, small art sculptures, etc.
vacuum investment casting
Vacuum investment casting is the process of completing precision casting in a vacuum state, which can effectively prevent the metal solution from rolling in the ceramic cavity and the pores generated after bursting, which brings internal defects and complex details that cannot be filled to the metal casting.
Supro Investment casting companies provide vacuum investment casting services for thin walled castings as well as castings with intricate details, ensuring that the castings maintain high precision and a very smooth surface.
Visit Supro Metal Investment Casting Foundry
Design - Prototype - Molds - Casting
Supro Metal Foundry is China leading metal investment casting manufacturer, founded in 1997, with continuous upgrading of casting technology and replacement of advanced casting equipment, we have become an industry-leading casting enterprise, covering an area of 8,800 square meters, with three castings workshop, a precision cnc machining and surface coating workshop, has 120 technical employees, 18 quality engineers, and 17 core company management. Provide stable metal fonderie à cire perdue parts supply projects for 3800+ purchasing companies from China and the world.
Whether rapid fonderie à cire perdue prototype or high volume casting, we can provide strong casting capabilities, including: product design and optimization, mold design and manufacturing, metal casting process, quality control, precision CNC machining, material and physical property testing, surface coating , as well as one-stop metal casting services such as packaging and transportation.
How Ceramic Shell Investment Casting Works
From Wax Pattern to Inspected Casting
Every project follows a controlled lost-wax sequence. Knowing where your part sits in this flow makes design review, machining allowance and lead time easier to plan.
1.
Wax Pattern & Tree
Wax is injected (or DLP-printed) and assembled into a tree for batch casting.
2.
Ceramic Shell
Repeated silica-sol or water-glass dipping builds a strong ceramic shell.
3.
Dewax & Pour
Wax is melted out; molten alloy is poured — under vacuum where required.
4.
Cut, Machine & Inspect
Shell removal, cut-off, CNC machining, heat treatment and final inspection.
Capabilities & Tolerances
Investment Casting Specifications
Typical ranges below. Final tolerance, wall thickness and finish are confirmed against your drawing and alloy before quotation.
| Parameter | Silica Sol Route | Water Glass Route |
|---|---|---|
| Linear Tolerance | CT4–CT6 (≈ ±0.15 mm typical) | CT6–CT8 |
| Surface Finish (Ra) | Ra 1.6–3.2 µm | Ra 6.3–12.5 µm |
| Min. Wall Thickness | from ~2 mm | from ~4 mm |
| Casting Weight Range | 10 g – 30 kg | 0.5 kg – 80 kg |
| Typical Use | Precision, thin-wall, cosmetic parts | Heavier / structural parts, cost-sensitive |
| Prototype Lead Time | DLP wax: ~7–15 days | Confirmed at RFQ |
Materials · 250+ Alloys
Investment Casting Material Solutions
Investment casting suits a wide range of ferrous and non-ferrous metals. If the alloy is not fixed, our engineers can help you select the right one for corrosion, strength, wear or temperature requirements.
stainless steel investment casting
steel investment casting
aluminum investment casting services
copper investment casting
China Supro fonderie à cire perdue Foundry
what is precision investment casting ?
Metal Investment casting, also known as: lost wax casting, is one of the popular metal precision casting processes in the manufacturing industry. The industrial or household wax is molded through a mold, connected into a tree-like structure, and a multi-layer ceramic shell containing silica sol or water glass is wrapped on the outer layer. Metal casting is performed after drying.
Investment casting parts have many advantages to accurately create complex structure of product casting structure and shape, as close as possible to the final shape, compared with traditional moulage au sable, investment casting parts are more accurate in size and have a better surface finish to reduce precision processing cost.
- Offers greater flexibility in design.
- Provides more details on complex structures.
- Affordable low cost moules de fonderie.
- Multiple alloy options to enhance the performance of cast pièces.
- Surface finish Ra 3.2.
- Precision tolerance Min ±0.15mm.
- High-volume casting maintains consistent high-quality delivery.
Custom investment casting manufacturers
Retrofitting old equipment? No parts design drawings?
Metal fonderie à cire perdue part models are pivotal at the outset of any project. However, for innovative creations by entrepreneurs or retrofitting of outdated equipment, the absence of part design drawings or 3D models presents a significant challenge for many engineers and innovators. This leaves numerous clients at a loss, unsure how to proceed with their metal casting projects.
Supro MFG specialises in bespoke metal investment casting part design and foundry techniques, enabling us to actively engage in the product design phase. Based on your functional requirements and environmental constraints, we provide timely professional guidance and refine preliminary designs for investment castings, steering projects towards greater cost-effectiveness.
Product Design & Optimization – 3D Printing Rapid Prototyping – Prototype investment Casting – Installation & Testing
Metal investment casting Product Design & Optimization
We proactively provide metal casting component design solutions for users lacking design drawings or possessing incomplete schematics. Whether you have only a concept or a simple hand-drawn sketch, we can optimise your project design from an application functionality perspective.
This encompasses: 3D scanning, manual measurement, CMM measurement, and more. We will continue until comprehensive design documentation is created. This approach will save you development costs and ensure a smooth process.
3D printing rapid wax prototyping
We provide industrial-grade, high-precision 3D printing rapid prototyping services to test the design rationality and functionality of your products, or to swiftly create wax models in preparation for subsequent rapid casting.
The primary 3D printing technologies involved in rapid prototyping are:
- SLS PA8200 nylon printing
- SLA photopolymer resin printing
- MJF black PA12 nylon printing
- SLM aluminium and acier inoxydable metal printing
- DLP wax pattern rapid printing
For 3D printing quotations, please provide STL, STP, STEP, XTP, IGES, or OBJ format files modelled in 3D software such as ProE/UG/3DMAX/MAYA/ZBrush/Rhino.
Metal prototype investment casting services
supro MFG provides rapid prototyping casting services, enabling you to advance prototype part designs through testing phases without investing in costly, complex moulds. Utilising advanced 3D printing wax mould technology (DLP 3D printing), we directly print 3D wax models from CAD files. Precision mould cavities are then formed using plaster, enabling faster, more efficient design validation. This ensures the final product meets your specifications and prevents misdirected investment.
Looking for a reliable investment casting manufacturer?
- Nous pouvons vous aider à optimiser la conception de vos produits et à réduire vos coûts.
- Nous pouvons vous aider avec une haute qualité et un grand volume pièces moulées.
- Nous pouvons livrer à temps et obtenir de nouvelles opportunités de marché.
- You will benefit from Supro MFG metal casting service.
China Supro fonderie à cire perdue manufacturers
metal investment casting quality control
Create
functional and aesthetic vision
for high-quality
metal investment casting parts.
- Surface defect inspection.
- Inclusion inspection.
- Internal casting defects.
- Forming cooling defects.
We value the high quality delivery of precision metal investment castings, a professional quality control team monitors all casting processes including: surface defects, internal defects, dimensional defects and material composition.
We pay more attention to the function and aesthetic vision of the product, including: oil & air tightness, surface spray (custom color), polishing, painting, etc.
- Appearance and structure inspection.
- Dimensional quality inspection.
- CMM type bit size detection.
- Chemical composition detection (spectroscopy).
- Mechanical property testing.
- Destructive detection.
- Non-Destructive Testing (NDT).
- Assembly and testing.
Investment Casting FAQ for OEM Buyers
These questions cover MOQ, tolerance, material choice, cost, inspection and post-casting machining for custom investment (lost-wax) casting.
What is the minimum order quantity (MOQ) for fonderie à cire perdue?
What tolerance and surface finish can investment casting achieve?
How much does investment casting cost per kg?
What materials can be investment cast?
What is the difference between silica sol and water glass casting?
What is the difference between investment casting and sand casting?
Can you provide CNC machining and heat treatment after casting?
What inspection reports can you provide?
What file formats do you accept for an RFQ?
Get a Factory-Direct Investment Casting Quote
What to include in your RFQ
- 2D / 3D files: PDF, DWG, DXF, STEP, STP, IGES, OBJ
- Alloy grade or target mechanical properties
- Quantity, annual volume and order pattern
- Tolerance, surface finish, machining & inspection needs
- Application, working load and environment
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