In the world of automotive manufacturing, precision is not a luxury — it is a non-negotiable requirement. Every component, from the smallest bracket to the largest body panel, must meet exacting dimensional tolerances and performance standards. For over two decades, DIAN Stamping (LinhaI Dian Mould Co., Ltd) has been the trusted partner that global OEMs turn to for reliable, cost-effective, and precision-engineered automotive stamping solutions.

Two Decades of Automotive Manufacturing Excellence

Founded in 2004 in Taizhou, Zhejiang, DIAN Stamping has grown from a specialized tooling workshop into a comprehensive manufacturing powerhouse. With a modern 50,000-square-meter production base and an additional 40,000 square meters under development, the company is equipped to handle projects of any scale — from prototype development to high-volume mass production. Its team of approximately 110 skilled professionals, including 35 dedicated die designers and technicians, produces an annual capacity of approximately 2,000 sets of medium and small stamping dies, with a reported annual die turnover of around RMB 50 million.

What truly sets DIAN apart is its vertically integrated, one-stop service model. Unlike many suppliers that specialize in only one segment of the manufacturing chain, DIAN offers a seamless end-to-end solution that covers stamping dies, sheet metal stamping, welding assembly, powder coating, and finished product assembly — all under one roof. This integrated approach eliminates the inefficiencies of multi-vendor coordination, reduces lead times, and ensures consistent quality across every stage of production.

Precision Tooling: The Heart of the Operation

At the core of DIAN's capabilities lies its expertise in high-precision die manufacturing. The company specializes in progressive die, transfer die, and tandem die solutions for complex automotive and industrial parts. Progressive dies, in particular, are a hallmark of DIAN's engineering prowess — these multi-station tools transform a metal strip through a series of operations in a single press cycle, delivering exceptional efficiency and repeatability for high-volume production runs.

The die design and manufacturing process at DIAN leverages advanced CAD/CAM technologies, combined with decades of hands-on experience in tool and die making. Every die is precision-machined, heat-treated, and rigorously tested before it enters production. This meticulous attention to detail ensures that each die delivers consistent performance, extended service life, and the tight tolerances that automotive applications demand.

Beyond Stamping: Integrated Welding, Assembly, and Inspection Services

What separates a parts supplier from a true manufacturing partner is the ability to deliver complete, assembly-ready components. DIAN's service portfolio extends well beyond stamping to include metal stamping parts, welding assembly, and finished product assembly. The company's welding workshop is equipped to handle complex welding tasks, including spot welding, MIG welding, and TIG welding, ensuring robust and durable joints for sub-assemblies and finished components.

Quality assurance is embedded into every step of the production process. DIAN designs and manufactures its own checking fixture and welding jig solutions, enabling in-house dimensional inspection and precise part positioning during welding. These fixtures are engineered to GD&T standards, allowing for rapid and accurate verification of part geometry. This self-contained quality ecosystem means that every component leaving DIAN's facility has been inspected against the same rigorous criteria used by the world's top automotive OEMs.

Certifications That Build Trust

In the automotive supply chain, certifications are the language of trust. DIAN Stamping holds a comprehensive suite of internationally recognized certifications that attest to its commitment to quality and continuous improvement:

The IATF 16949 certification is particularly significant, as it represents the highest global standard for automotive quality management systems. It demonstrates DIAN's focus on defect prevention, waste reduction, and continuous improvement — principles that directly translate into higher quality parts and more reliable deliveries for its customers.

In addition, DIAN's recognition as a National High-Tech Enterprise and its operation of a dedicated High-Tech R&D Laboratory underscore the company's investment in innovation. With a portfolio of patented technologies and a team of engineers dedicated to process improvement, DIAN continuously pushes the boundaries of what is possible in metal forming and tooling design.

A Global Partner Trusted by Industry Leaders

DIAN's reputation extends far beyond China. The company exports its products and services to more than 10 countries, serving a diverse international client base that includes some of the most recognizable names in the automotive industry: KIA, BYD, Toyota, Honda, Suzuki, and Geely. These long-term partnerships are built on a foundation of consistent quality, reliable lead times, and competitive pricing.

Typical delivery for steel stamping dies is 30–40 days, while casting stamping dies require approximately 70 days, depending on project complexity. The company also offers free solutions, tooling, and metal samples (with freight paid by the customer), making it easier for potential partners to evaluate DIAN's capabilities before committing to full-scale production.

OEM/ODM Customization: Tailored Solutions for Every Application

Every automotive project is unique, and off-the-shelf solutions rarely deliver optimal results. DIAN specializes in non-standard OEM/ODM customization, accepting design inputs from 2D drawings, 3D data, or physical samples. The company's engineering team works closely with clients to refine designs for manufacturability, optimize material selection, and develop tooling strategies that balance cost, quality, and production speed.

Whether the requirement is a complex progressive die for a high-volume body panel, a precision checking fixture for a welded assembly, or a custom metal stamped part for an EV battery enclosure, DIAN has the technical depth and manufacturing capacity to deliver. The company's in-house capabilities span the entire production chain — from tool design and fabrication to stamping, welding, coating, and final assembly — ensuring full control over quality, cost, and delivery.