Over 20 years of automotive-grade stamping expertise serving global OEMs from Zhejiang, China

When sourcing china sheet metal parts, automotive OEMs and Tier-1 suppliers need more than just a supplier — they need a manufacturing partner with proven die engineering, rigorous quality control, and the production scale to deliver consistent results. LINHAI DIAN MOULD CO., LTD (Dian Stamping) has been precisely that partner since 2003. Headquartered in Huangyan, Taizhou, Zhejiang Province, the company has built a reputation for precision-engineered stamping dies, high-quality stamped sheet metal components, checking fixtures, and welding jigs that serve customers including KIA, BYD, Toyota, Honda, Suzuki, and Geely across more than 10 countries.

Manufacturing Scale and Capability

Dian Stamping operates a modern facility covering approximately 50,000 m², with a dedicated die workshop of 4,000 m². The company employs around 110 skilled professionals, including approximately 35 die designers and technicians who bring decades of collective experience in tool and die engineering. This infrastructure supports an impressive annual capacity of approximately 2,000 sets of medium and small stamping dies, with a reported annual die turnover of approximately RMB 50 million. A planned new 35,000 m² facility featuring advanced press and coating lines is already underway, further expanding the company's production capabilities.

Core Product Lines

Stamping Dies. Dian Stamping specializes in progressive die stamping, transfer dies, and tandem/multi-station dies for large and medium-sized complex automotive parts. The company processes a wide range of materials including multiphase steel, aluminum alloys, custom rolled and welded plate, and stainless steel. Whether you need a progressive die for high-volume production or a transfer die for deep-drawn components, Dian Stamping delivers tooling that maximizes uptime and part consistency.

Sheet Metal Parts. Beyond tooling, Dian Stamping produces custom stamped sheet metal parts and welded assemblies for both automotive and household appliance applications. From body-in-white panels and chassis components to brackets, heat shields, and structural reinforcements, the company's stamping capabilities cover the full spectrum of custom metal fabrication.

Checking Fixtures. Every stamped part needs verification. Dian Stamping designs and manufactures high-precision checking fixtures — GD&T-oriented inspection tools that allow rapid, repeatable quality checks on production parts. Press dies and checking fixtures are always produced as a matched set, ensuring dimensional accuracy and eliminating measurement variability.

Welding Jigs. To support downstream assembly, Dian Stamping provides custom welding jigs and fixtures that ensure accurate positioning and repeatable welding results. These jigs are designed for automotive body assembly, seating systems, exhaust systems, and chassis structures, enabling consistent weld quality across production runs.

Application Coverage Across Automotive Systems

Dian Stamping's tooling and stamped parts are used across a wide range of automotive systems:

• Body-in-White (BIW): Side frames, A-pillar panels, rear outer panels, spare tire wells, and structural reinforcements
• Door Systems: Hinge reinforcement plates, water-cut reinforcement panels, guides, and door inner/outer panels
• Seating Systems: B-pillar liners, seat basins, support beams, battery cases, and floor panels
• Instrument Panels: Dashboard support structures and cross-car beams
• Exhaust Systems: Heat shields and thermal management components
• Chassis Systems: Control arms, swing arms, and suspension components

Quality Assurance and Certifications

Quality is embedded in every stage of Dian Stamping's manufacturing process. The company operates under an ISO 9001-certified quality management system and follows IATF 16949-oriented automotive manufacturing practices. In-line inspections, coordinate measuring machine (CMM) verification, and strain analysis ensure that every die and stamped part meets OEM specifications. The company's commitment to precision extends from first-article inspection through ongoing statistical process control (SPC) during production runs.

Customization and Delivery

Dian Stamping offers comprehensive customization services. Customers can submit requirements via 2D drawings, 3D data, or physical samples, and the engineering team will develop the optimal tooling and production solution. Prototype services are available for new product development. Typical lead times are 30–40 days for steel stamping dies and approximately 70 days for casting stamping dies, depending on project complexity. Free metal samples can be provided, with freight paid by the customer.

For OEMs and Tier suppliers seeking a reliable partner for automotive stamping dies and custom sheet metal fabrication, Dian Stamping combines factory-direct pricing, precision engineering, and two decades of export experience to deliver components that meet the highest global standards.