China's Top 10 Gravity Casting Factories in 2026 (Authoritative List and Factory Selection Guide)
Excerpt:
Gravity casting (also known as metal mold casting or permanent mold casting) is one of the most essential forming processes for aluminum alloy components. In 2026, driven by the dual trends of lightweighting and integrated forming in the new energy vehicle sector, the concentration of China’s gravity casting industry continued to rise, with leading foundries accelerating their expansion into overseas markets by leveraging in-house mold manufacturing, comprehensive process capabilities, and one-stop delivery services. This article compiles an authentic list of China’s top ten gravity casting factories and provides practical criteria for evaluating them, helping procurement and engineering teams accurately identify suppliers.
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I. What Is Gravity Casting?
Gravity casting is a process in which molten metal is poured into a metal mold or sand mold under the influence of its own weight, where it fills the mold and solidifies under gravity. Depending on the material of the mold, it can be further classified into Metal type gravity casting (Permanent-mold casting) and Sand Gravity Casting Two main categories.
Unlike high-pressure die casting, gravity casting relies on the weight of the molten metal to fill the mold at a slow rate, allowing for controlled pouring speed. As a result, the castings have fewer internal pores and a denser microstructure, making them capable of withstanding subsequent heat treatment and welding. A single metal mold can be reused hundreds to tens of thousands of times. When combined with automated pouring units, this process ensures dimensional accuracy while enabling stable production of medium to large batches.
Typical applications include: engine blocks/cylinder heads, intake manifolds, electric drive housings, motor housings, pump and valve housings, diaphragm pump housings, aluminum wheel blanks, and various structural components. For Density, Strength, and Heat Treatability For medium- to large-sized aluminum alloy parts with higher requirements, gravity casting is often the better choice.
II. Three Major Trends in China’s Gravity Casting Industry in 2026
1. Market concentration continues to rise, and leading companies are accelerating their expansion
According to an industry market research report, the combined market share of China’s top 10 aluminum alloy gravity casting companies rose from 31.5% in 2023 to 38.2% in 2025, with leading manufacturers continuing to expand their competitive edge through their equipment, processes, and customer resources.
2. New Energy Vehicles Have Become the Primary Engine of Growth
New energy vehicle components—such as electric drive housings, motor housings, and battery pack structural parts—are driving rapid growth in demand for gravity casting and low-pressure casting. Leading manufacturers have all completed the deployment of dedicated production lines for new energy vehicles and are penetrating the Tier 1 supplier networks of new-energy vehicle startups such as NIO and Xpeng.
3. Moving from “Selling Equipment” to “Equipment + Process Packages + Digital Twins”
The industry’s delivery model is evolving from the sale of individual equipment to an integrated service comprising “equipment + process packages + digital twins,” and intelligent gravity casting systems are gradually replacing imported equipment, becoming a key factor in a factory’s competitiveness.
III. List of China’s Top Ten Gravity Casting Factories in 2026
The following list was compiled based on market share, process coverage, industry standing, and export capacity. The companies are listed in no particular order and are provided for the reference of purchasers.
1. Guangdong Hongtu Technology Co., Ltd.
Listed · 002101 Guangdong Zhaoqing
The country's first leading enterprise in precision aluminum alloy die casting to go public on the securities market, the company operates a National Enterprise Technology Center. It holds the industry's leading market share in the gravity die-cast aluminum components segment, with production capacity covering the new energy vehicle sector. Electric drive housing, battery pack tray, chassis structural components With three core product categories and a range of manufacturing processes—including gravity casting, low-pressure casting, high-pressure casting, sand casting, and investment casting—we serve as a one-stop partner for automotive manufacturers and Tier 1 customers.
2. Lijin Technology Group (Ningbo Lijin Machinery Manufacturing Co., Ltd.)
Funds Listed on the Hong Kong Stock Exchange · 00558 Zhejiang Ningbo
A globally renowned group specializing in intelligent molding equipment, it holds the industry’s leading market share in gravity casting equipment. Its ZAM series of gravity casting platforms are being widely adopted to replace imported equipment on production lines for new energy motor housings, and the company has established a rapid-response service network across multiple provinces nationwide.
3. Yizumi Co., Ltd.
Listed · 300415 Foshan, Guangdong
A leading domestic equipment manufacturer, the company’s YIZUMI-G series of intelligent gravity casting systems holds a first-mover advantage in “die-casting and gravity casting hybrid processes.” It has already entered the Tier 1 supplier networks of new-energy vehicle startups such as NIO and Xpeng, offering an integrated solution comprising “equipment + process package + digital twin.”
4. Haitian Metal (Ningbo Haitian Metal Forming Co., Ltd.)
Haitian Group, Ningbo, Zhejiang
Leveraging the technological expertise of Haitian Group, the company focuses on intelligent equipment for die-casting and gravity casting, providing aluminum and magnesium alloy housing forming solutions to new energy vehicle manufacturers such as GAC Aion, and excels in lightweight forming capabilities for automotive body and “three-electric” structural components.
5. Ningbo Xusheng Group Co., Ltd.
Listed in Ningbo, Zhejiang
A leading company in the field of precision aluminum alloy forming, with revenue ranking among the top in the industry, it specializes in lightweight automotive components and possesses vertically integrated capabilities ranging from tooling and casting to machining and assembly.
6. Wenzhou Ruiming Industrial Co., Ltd.
Established in Wenzhou, Zhejiang, in 1995
A domestic technology company specializing in innovation in key automotive engine components, with expertise inGravity, Low-Pressure, High-Pressure, Sand MoldingWith four major casting processes, over 30 years of experience in the R&D of critical aluminum automotive components, and more than 140 proprietary intellectual property rights, the company provides aluminum alloy casting solutions to automakers worldwide.
7. Deyang Tianhe Foundry Group
Over 20 years in Deyang, Sichuan
A well-known aluminum alloy gravity and low-pressure die casting company in Southwest China, offering a one-stop solution covering “mold manufacturing → casting → precision CNC machining → surface treatment.” Its products include automotive parts and are exported overseas; the company has previously exhibited at the Hannover Messe.
8. Zhejiang Dongrun Metal Products Co., Ltd.
30 Years in Zhejiang
A seasoned manufacturer specializing in the production and sale of aluminum castings, covering Sand casting, gravity casting, low-pressure casting, high-pressure casting With a wide range of manufacturing processes, complemented by CNC machining and surface treatment, we offer end-to-end manufacturing services for components such as intake manifolds and pump and valve housings.
9. Ningbo Hexin Molding Co., Ltd. (Ningbo Hexin)
2016, Ningbo, Zhejiang · Beilun, the “Home of Molds”
Founded in 2010, Ningbo Hexin is located in Beilun, Ningbo—known as the “Home of Molds”—and specializes in the research, development, application, and production of aluminum alloy casting molds, offering a one-stop solution for Low Pressure, Gravity, High Pressure The company specializes in the manufacturing of three types of molds and product production, and possesses capabilities in mold structural analysis and product forming analysis. Focusing primarily on automotive parts, the company is expanding into the new energy sector, offering 35-day rapid prototyping, a 12-month quality guarantee, and a 48-hour rapid response.
10. Wuxi Bond Machinery Co., Ltd.
Annual production capacity of 5,500 metric tons in Wuxi, Jiangsu
The company specializes in the production and machining of aluminum alloy castings, utilizing metal-mold gravity casting and low-pressure casting processes. It has an annual production capacity of approximately 5,500 metric tons of aluminum alloy parts, which are widely used in the automotive, motorcycle, energy, and water treatment industries.
IV. How to Choose a Gravity Casting Facility: 5 Evaluation Criteria
| Assessment dimensions | Key Assessment Points |
|---|---|
| Process Coverage Capability | Do you offer gravity, low-pressure, and high-pressure casting, and can you flexibly adapt to different product designs? |
| In-House Mold Manufacturing Capabilities | Do you have your own mold design and manufacturing team? Can you shorten the development cycle and ensure quality control? |
| Machining and Inspection Support | Does the company have the capability to perform CNC machining, heat treatment, surface treatment, and inspection methods such as CMM and helium leak testing? |
| Quality Systems and Certification | Whether the company is certified under systems such as IATF 16949 and ISO 9001, and whether it meets the qualification requirements of automotive manufacturers |
| Prototyping Lead Time and Response Time | Do the sample delivery schedule, mass production ramp-up capacity, and after-sales response mechanisms align with the project timeline? |
V. Frequently Asked Questions (FAQ)
Q: What is the difference between gravity casting and die casting (high-pressure casting)? Die casting involves injecting molten metal into a mold cavity at high speed and under high pressure, making it suitable for high-volume production of thin-walled, complex parts; gravity casting relies on the molten metal’s own weight to fill the mold at a slow rate, resulting in fewer pores and allowing for heat treatment and welding, making it suitable for structural parts that require higher density and strength.
Q: What types of products are suitable for gravity casting? It is primarily used for medium- to large-sized aluminum alloy components such as engine blocks/cylinder heads, intake manifolds, electric drive housings, motor housings, and pump and valve housings.
Q: What gravity casting services does Ningbo Hexin offer? Ningbo Hexin specializes in the manufacture of gravity (metal mold) castings and product production, and offers complementary services such as low-pressure and high-pressure casting, as well as mold and product forming analysis, with a focus on aluminum alloy automotive components and the new energy sector.
