Every automotive OEM knows the truth: a vehicle is only as strong as the tooling that shapes it. When body panels, structural reinforcements, and chassis components must meet ever-tightening tolerances while keeping cost targets in check, the choice of a stamping partner becomes a strategic decision — not just a sourcing transaction.

DIAN STAMPING (LINHAI DIAN MOULD CO., LTD) has been delivering precisely that kind of strategic value since 2003. Based in Huangyan, Taizhou, Zhejiang Province — a region long recognized as a manufacturing hub for precision tooling — the company has grown from a specialized die workshop into a full-spectrum manufacturing partner for some of the world's most demanding automotive brands.

A Manufacturing Partner, Not Just a Supplier

What sets DIAN STAMPING apart from many stamping die manufacturers is the breadth of its vertically integrated capabilities. Rather than specializing in a single process, the company offers end-to-end services that span tool design and fabrication, high-volume stamping production, welding and assembly, and quality inspection — all under one roof.

The company's modern facility covers approximately 50,000 m², with a dedicated die workshop of 4,000 m². A planned 35,000 m² expansion featuring new press and coating lines will further extend capacity. With around 110 employees — including 35 die designers and technicians — the team combines deep engineering expertise with hands-on shop-floor experience. Annual die production capacity stands at approximately 2,000 sets of medium and small stamping dies, with a reported annual die turnover of around RMB 50 million.

Precision Tooling for Complex Automotive Applications

DIAN STAMPING specializes in the design and manufacture of automotive stamping dies across multiple die types, including progressive dies, transfer dies, and tandem/multi-station dies. Each die type is selected based on part geometry, production volume, and material characteristics to optimize both tool life and part quality.

The company's die-making capabilities extend to a wide range of materials: multiphase steel, aluminum alloys, custom rolled and welded plate, and stainless steel. This material flexibility is critical for modern automotive lightweighting strategies, where designers increasingly specify advanced high-strength steels (AHSS) and aluminum alloys to reduce vehicle weight while maintaining crash performance.

Application areas covered by DIAN STAMPING's tooling include:

Progressive Die Stamping: Efficiency at Scale

For high-volume production runs, progressive die stamping is often the most cost-effective approach. In a progressive die, a strip of metal moves through a series of stations, each performing a distinct operation — piercing, forming, drawing, trimming — until a finished part emerges at the final station. This method eliminates the need for multiple individual press setups, reduces material handling, and delivers consistent part quality across millions of cycles.

DIAN STAMPING designs and builds progressive dies optimized for both steel and aluminum stamping, with careful attention to strip layout, station sequencing, and material utilization. The result is a tool that minimizes scrap, maximizes press speed, and maintains dimensional stability over extended production runs — factors that directly impact the OEM's cost per part.

Beyond Dies: Sheet Metal Parts, Checking Fixtures, and Welding Jigs

DIAN STAMPING's capabilities extend well beyond tooling. The company produces stamped sheet metal parts for both automotive and household appliance applications, leveraging its in-house dies to ensure dimensional accuracy and production efficiency. From body-in-white stampings to refrigerator brackets and heat sinks, the company's part portfolio covers a broad spectrum of industries.

Quality assurance is supported by precision checking fixtures — purpose-built inspection tools that verify whether a stamped workpiece conforms to its design dimensions. As DIAN STAMPING notes, press dies and checking fixtures are always required as a set; the fixture eliminates measurement variability and ensures that every part leaving the production line meets the specified tolerances.

Welding jigs and fixtures round out the company's service offering, enabling accurate, repeatable positioning for welding and assembly operations. These custom fixtures support everything from automotive chassis welding to appliance assembly, helping customers achieve consistent weld quality and dimensional control in their own production processes.

Quality Systems and Customer Confidence

DIAN STAMPING operates under an ISO 9001 quality management system, with manufacturing practices aligned to IATF 16949 automotive standards. The company's quality approach includes in-line inspections, dimensional verification using CMM (coordinate measuring machine) equipment, and rigorous process control throughout the die design, fabrication, tryout, and production phases.

The company's customer roster reflects this commitment to quality. DIAN STAMPING has supplied tooling and stamped parts to OEMs including KIA, BYD, Toyota, Honda, Suzuki, and Geely, and exports to more than 10 countries worldwide. These long-term relationships are built not just on competitive pricing, but on consistent delivery performance, technical responsiveness, and the ability to scale production as vehicle programs ramp up.

The DIAN STAMPING Difference: A Partner for the Long Term

In an industry where tooling quality directly determines production uptime and part quality, the choice of a stamping die partner is not a decision to be taken lightly. DIAN STAMPING brings more than two decades of hands-on experience, a 50,000 m² manufacturing base, a team of 35 skilled die engineers, and a proven track record with leading global automotive brands.

Whether you are launching a new vehicle platform, consolidating your tooling supply chain, or seeking a cost-competitive source for high-volume stamped parts, DIAN STAMPING offers the engineering depth, production capacity, and quality systems to deliver — from first design review to full production ramp.