Top 10 Precision Aluminium Investment Casting Factories in China

For procurement teams and OEM buyers sourcing metal components in bulk, aluminium investment casting remains one of the most cost-effective ways to get complex, thin-wall parts made to tight tolerances without paying tooling premiums typical of Western foundries. China's supplier base for this process is deep, and wholesale buyers have no shortage of factories to choose from — the challenge is finding a manufacturer that can actually scale with your order volume and hold quality across production runs.

This guide rounds up 10 aluminium investment casting suppliers worth adding to your sourcing shortlist. It's written for buyers, purchasing managers, and OEM/ODM partners who need to compare:

• Which factories bundle casting with downstream CNC machining, so you're not managing two vendors
• Which suppliers are set up for automotive, lighting, and electronics volume orders vs. one-off prototypes
• Who can also run die, sand, or gravity casting if a project calls for a different process mix

Treat this as a starting point for vendor qualification, not a final ranking — every sourcing decision should still involve requesting samples, checking certifications, and getting a quote against your own drawings.

10 Aluminium Investment Casting Suppliers to Shortlist in China

1. ZP Aluminum

Supplier snapshot:

Based in Foshan's Leping Industrial Zone, ZP Aluminum supplies lost-wax investment castings alongside die casting, sand casting, and aluminum extrusion — a combination that lets buyers consolidate multiple part types under one purchase order instead of splitting sourcing across separate factories.

The supplier's OEM/ODM setup covers mold design through finished parts, including anodizing and powder coating, which is useful for wholesale buyers who need cosmetic-grade aluminum components without adding a separate finishing vendor to the supply chain.

Location: Leping Industrial Zone, Sanshui District, Foshan, Guangdong

In operation since: Early 2000s

What buyers can order:

• Lost-wax aluminum investment castings
• Aluminum sand-cast and die-cast parts
• Custom aluminum extrusion profiles
• CNC machining and secondary processing
• OEM/ODM mold development
• Anodizing, e-coating, powder coating

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2. Simis Casting

Supplier snapshot:

Taiyuan SIMIS Investment Casting Co., Ltd. is built for volume: six foundries and two CNC workshops turning out roughly 50,000 tons of castings a year across stainless steel, alloy steel, carbon steel, iron, and aluminum. For buyers who need a supplier that can absorb large, recurring orders without lead-time blowouts, that kind of installed capacity matters more than a polished showroom.

Simis serves automotive, railway, construction machinery, petrochemical, municipal engineering, and mining accounts, using both silica sol and water-glass investment casting methods depending on part tolerance requirements.

Location: Taiyuan City, Shanxi Province

In operation since: 2003

What buyers can order:

• Silica sol and water-glass investment casting
• Lost-wax casting for complex parts
• Sand casting for steel and iron components
• Stainless, alloy, carbon steel and aluminum castings
• CNC machining and finishing
• Mold and tooling development

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3. Alu Die Casting

Supplier snapshot:

Alu Die Casting (run by GC Precision Mold Co., Ltd.) is more of a die-casting house than a pure investment caster, but it earns a spot here because many buyers sourcing aluminum parts end up comparing investment casting quotes against die casting alternatives for the same part. The company handles tooling, casting, CNC machining, plastic injection molding, and finishing in-house across multiple Dongguan facilities.

Its press lines go up to 2000-ton high-pressure die casting machines, with alloy options including ADC12, A380, Zamak, and magnesium — a fit for automotive parts, lighting housings, electronic enclosures, and OEM assemblies bought in larger quantities.

Location: Dongguan City, Guangdong Province

In operation since: 1999

What buyers can order:

• Aluminum, zinc and magnesium die casting
• Custom mold and tooling design
• CNC machining, metal and plastic
• Plastic injection molding
• Powder coating, anodizing, plating

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4. RMC Casting Foundry

Supplier snapshot:

RMC Casting Foundry (Qingdao Rinborn Machinery Co., Ltd.) is worth a look when a project doesn't cleanly fit one casting method. The foundry runs sand casting, investment casting, shell molding, lost foam casting, and vacuum casting under one roof, which gives buyers flexibility to switch processes mid-development if tolerances or budget targets change.

It's ISO 9001 certified and supplies automotive, machinery, hydraulics, pump and valve, and transportation customers — sectors where dimensional consistency across a large purchase order is non-negotiable.

Location: Qingdao, Shandong

In operation since: 1999

What buyers can order:

• Investment casting for precision components
• Sand casting for industrial parts
• Shell mold and lost foam casting
• Vacuum (V-process) casting
• CNC machining, ferrous and non-ferrous
• Process and material engineering support

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5. CFS Foundry

Supplier snapshot:

CFS Foundry runs multiple production lines dedicated to lost-wax investment casting, die casting, and CNC machining, and it's set up to handle both trial-order quantities and repeat wholesale volumes without re-quoting the whole tooling process each time.

Value-added services — machining, surface finishing, casting-design engineering support — are bundled in, which keeps landed cost predictable for buyers comparing quotes across the machinery, automotive, and industrial equipment sectors.

Location: Ningbo, Zhejiang

In operation since: 2001

What buyers can order:

• Lost-wax investment casting
• Stainless, alloy and carbon steel investment castings
• Aluminum and zinc die casting
• 3/4/5-axis CNC machining
• Surface finishing
• Casting design optimization

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6. Minghe Casting

Supplier snapshot:

Minghe Casting pairs mold development with aluminum investment casting, die casting, and CNC machining, aiming its output at lightweight, durable parts for automotive, machinery, telecommunications, and lighting buyers.

The factory is set up for both custom, low-volume development orders and larger production runs, which makes it a reasonable option for buyers who want the same supplier to carry a part from prototype through mass production.

Location: Dongguan, Guangdong

In operation since: 1980s

What buyers can order:

• Aluminum investment casting
• Aluminum, zinc and magnesium die casting
• Custom mold design and tooling
• CNC machining and finishing
• Anodizing, coating, polishing

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7. Innovaw Mechanical

Supplier snapshot:

Innovaw Mechanical, headquartered in Ningbo, runs separate facilities for aluminum investment casting, high and low pressure die casting, gravity casting, sand casting, and CNC machining — letting buyers move a part between processes without switching suppliers if the original casting method turns out to be the wrong fit for cost or volume.

Its investment casting line covers the full lost-wax workflow, from wax injection and shell building through dewaxing, pouring, and finishing, supplying automotive, lighting, machinery, medical equipment, and industrial buyers. IATF 16949, ISO 14001, and ISO 45001 certification gives procurement teams a documented quality trail for audits.

Location: Ningbo, Zhejiang

In operation since: 2000s

What buyers can order:

• Aluminum investment casting, including thin-wall parts
• Lost-wax casting for precision components
• High pressure, low pressure and gravity casting
• CNC machining and finishing
• Tooling design and mold manufacturing
• Surface treatments for aluminum parts

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8. Besser Casting

Supplier snapshot:

Besser Casting operates a 12,000-square-meter plant certified to ISO 9001:2015 and IATF 16949:2016, casting stainless steel, carbon steel, alloy steel, tool steel, and nickel-based alloys via lost-wax investment casting.

More than 400 active customers and thousands of completed part numbers suggest a supplier used to onboarding new buyers efficiently — useful if your team needs fast sampling turnaround before committing to a production order. Construction hardware, automotive parts, valves, and tools make up its core customer base.

In operation since: 2002

Location: Ningbo, Zhejiang

What buyers can order:

• Lost-wax investment casting, stainless/carbon/alloy steel
• Tooling design and mold manufacturing
• CNC machining and finishing
• Rapid prototyping and sample development
• Polishing, heat treatment, blasting

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9. SAIVS

Supplier snapshot:

SAIVS is a TS16949-certified supplier running investment casting, die casting, sand casting, forging, and aluminum gravity casting alongside CNC machining, shipping more than 12,000 tons of castings a year across over 1,000 different part numbers. That kind of catalog breadth is a signal for wholesale buyers that the factory has already solved most of the tooling and process problems a new part is likely to hit.

Materials span stainless steel, alloy steel, ductile iron, brass, bronze, aluminum, and zinc, with customers in automotive, machinery, marine equipment, and electrical hardware. In-house tooling and OEM/ODM support round out a fairly complete sourcing package.

Location: Ningbo, Zhejiang

In operation since: 1989

What buyers can order:

• Investment casting, die casting, sand casting, forging
• Aluminum gravity casting and CNC machining
• OEM/ODM engineering, tooling, prototyping
• Heat treatment, coating, plating, finishing
• Steel, iron, aluminum and copper alloys

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10. Dolin Casting Co., Ltd.

Supplier snapshot:

Dolin Casting Co., Ltd. has more than 20 years in aluminum casting and runs sand casting, gravity casting, high-pressure die casting, and low-pressure die casting side by side, so buyers aren't locked into one process before quoting is even finished.

Parts leave the factory fully machined and tested for automotive, lighting housings, electrical enclosures, furniture structures, and general industrial equipment — a supplier profile that suits buyers who want a single vendor handling casting, machining, and finishing on one purchase order.

Location: Zhejiang & Shanghai

In operation since: 20+ years

What buyers can order:

• Sand, gravity, high-pressure and low-pressure die casting
• Custom aluminum components with full machining
• CNC machining and precision processing
• Polishing, coating, shot blasting, anodizing, heat treatment
• Engineering support from concept to mass production

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FAQ for Buyers

What is the investment casting industry?

Investment casting, also called lost-wax casting, is a manufacturing process where wax patterns are coated in a ceramic shell, then melted out and replaced with molten metal. It's widely used across automotive, aerospace, machinery, and electronics manufacturing to produce complex, near-net-shape parts that need little post-machining.

What metals are best for investment casting?

Aluminum alloys such as A356, A380, and 6061 are common for lightweight components, while stainless steel, carbon steel, alloy steel, and nickel-based alloys are used for parts that need higher strength or heat resistance. The right choice depends on the part's load, environment, and finishing requirements.

Is investment casting expensive?

Tooling costs are higher than sand casting because wax pattern molds take more time to build, but per-unit cost drops fast at volume since the process needs minimal machining. For complex, tight-tolerance parts, it's often more cost-effective overall than machining from solid stock.

What are the disadvantages of investment casting?

Upfront tooling cost is higher than sand casting, and lead times run longer due to the multi-step shell-building process. Part size is also a limiting factor — very large components are usually better suited to sand casting or die casting instead.

How is investment casting made?

A wax pattern is built and dipped repeatedly in ceramic slurry to form a shell. The wax is then melted out, molten metal is poured into the cavity, and the shell is broken away once the metal cools — leaving a near-net-shape part ready for finishing.

Final Take for Buyers

The suppliers on this list cover a broad range of scale, from six-foundry operations moving tens of thousands of tons a year to smaller shops built around fast sampling. What they share is the ability to bundle casting, CNC machining, and finishing under one purchase order — which is generally what buyers should be looking for to keep a supply chain simple.

Among them, Innovaw Mechanical is worth a closer look for buyers who need multiple casting processes available from one vendor: its investment casting line runs alongside high/low pressure die casting, gravity casting, and sand casting, backed by IATF 16949, ISO 14001, and ISO 45001 certification. For thin-wall, high-precision aluminum parts ordered at production volume, that combination of process flexibility and documented quality control makes it a practical sourcing option.

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