From die design and sheet metal fabrication to checking fixtures and welding jigs — one factory, one standard, one partnership.

In the highly competitive world of automotive manufacturing, the quality of your tooling determines the quality of your production. Every stamped part that enters a body-in-white assembly, a door system, or a chassis structure begins its life in a die. That is why selecting the right partner for automotive stamping dies is one of the most critical decisions an OEM or Tier supplier can make.

For over two decades, DIAN Stamping (LinHai Dian Mould Co., Ltd.) has been delivering precision-engineered tooling and stamped components to automotive brands including KIA, BYD, Toyota, Honda, Suzuki, and Geely, with exports reaching more than 10 countries. But what truly sets DIAN apart is not just the longevity — it is the company's vertically integrated manufacturing model that brings die design, stamping, inspection, and assembly under one roof.

A Factory Built for Scale and Precision

DIAN Stamping operates out of a modern facility spanning approximately 50,000 m² in Huangyan, Taizhou, Zhejiang Province — one of China's premier manufacturing hubs. The dedicated die workshop alone covers 4,000 m², housing a team of roughly 110 skilled professionals, including approximately 35 die designers and technicians. This in-house engineering capability means that every die is designed, simulated, and refined within the same facility where it will be built and tested.

The company's annual production capacity reaches approximately 2,000 sets of medium and small stamping dies, with an annual die turnover of around RMB 50 million. A new 35,000 m² facility is also underway, featuring additional press lines and advanced coating lines — a clear signal of the company's commitment to scaling alongside its customers' growing demands.

Comprehensive Die Capabilities: Progressive, Transfer, and Tandem Dies

As one of the experienced stamping die manufacturers in China, DIAN Stamping covers a full spectrum of stamping tooling. The company specializes in progressive dies for high-volume, multi-operation stamping; transfer dies for large and complex panels; and tandem dies for medium-to-large parts that require individual station processing. Each die type is designed with the specific geometry, material, and volume requirements of the customer's application in mind.

Material versatility is another hallmark of DIAN's capability. The factory processes multiphase steel (advanced high-strength steel), aluminum alloys, custom rolled and welded plate, and stainless steel — covering the full range of materials used in modern automotive lightweighting and structural reinforcement.

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

Unlike many tooling shops that stop at die delivery, DIAN Stamping extends its services into downstream production. The company manufactures custom metal stamping dies and uses them to produce finished sheet metal parts for automotive body, chassis, seating, and exhaust systems. These parts are available in both prototype and high-volume quantities, with options for laser cutting, bending, forming, and powder coating.

Quality assurance is a critical part of the production chain. DIAN designs and builds high-precision checking fixtures that use GD&T (Geometric Dimensioning and Tolerancing) principles to verify every critical dimension of a stamped component. This in-house inspection capability ensures that parts meet OEM specifications before they ever leave the factory floor.

For assembly-ready components, DIAN also provides custom welding jigs and fixtures. These jigs are designed to position, clamp, and hold parts during welding operations, ensuring repeatable accuracy in spot welding, TIG welding, and MIG welding processes. From chassis welding jigs to exhaust system fixtures, the company's welding solutions support the full spectrum of automotive assembly needs.

Quality Management and Certifications

DIAN Stamping operates under an ISO 9001 quality management system, with manufacturing practices aligned to IATF 16949 standards — the global quality benchmark for automotive suppliers. This dual focus on formal certification and practical shop-floor quality control means that every die, part, and fixture undergoes rigorous dimensional verification before shipment.

The company offers free metal samples for qualification, with the customer covering freight. Typical delivery timelines are 30 to 40 days for steel stamping dies and approximately 70 days for casting stamping dies — competitive lead times that help OEMs reduce time-to-market for new vehicle programs.

Customization and Engineering Support

DIAN's engineering team works directly from customer inputs — whether 2D drawings, 3D CAD data (CATIA, UG/NX, SolidWorks), or physical samples. The team provides design-for-manufacturing feedback, die structure optimization, and prototype services before committing to full production tooling. This collaborative approach reduces the risk of costly die modifications downstream and ensures that the final tooling is optimized for both part quality and production efficiency.

Why Vertical Integration Matters for Automotive OEMs

The automotive industry is moving toward faster model cycles, tighter cost targets, and more stringent quality requirements. Working with a vertically integrated partner like DIAN Stamping offers several distinct advantages:

• Single-Point Accountability: One team manages the entire chain from die design to finished assembly parts, eliminating coordination gaps between separate suppliers.
• Faster Lead Times: In-house die tryout, stamping, and inspection mean fewer handoffs and shorter iteration cycles.
• Cost Efficiency: Factory-direct pricing on dies, parts, and fixtures — no trading company margins.
• Consistent Quality: The same quality standards apply across die manufacturing, part production, and inspection.
• Simplified Logistics: Fewer suppliers to manage, audit, and qualify.

Serving Global Customers Across Vehicle Systems

DIAN Stamping's portfolio spans virtually every major vehicle system. The company's dies and parts are used in body-in-white structures, door systems, seating systems, instrument panels, fuel-tank systems, exhaust systems, clutch systems, and chassis systems. This breadth of application experience means that DIAN understands the unique tolerance, material, and surface-quality requirements of each subsystem.

With a customer base that includes global OEMs like KIA, Toyota, Honda, Suzuki, and Geely, as well as the fast-growing BYD, DIAN Stamping has demonstrated its ability to meet the quality, delivery, and cost expectations of the world's most demanding automakers.