From precision stamping dies to finished assemblies — one factory, one supply chain, one quality standard.

In the world of automotive manufacturing, the difference between a good supplier and a great one often comes down to control. Control over design, over tooling, over production, and over quality. For global OEMs sourcing progressive die stamping solutions, finding a partner that owns its entire production chain — rather than outsourcing critical steps — is increasingly rare. Yet it is precisely this full in-house capability that sets DIAN STAMPING apart from the competition.

Operating under LINHAI DIAN MOULD CO., LTD, DIAN STAMPING has been serving the global automotive industry from its headquarters in Linhai, Taizhou, Zhejiang Province, China, since 2003. With over two decades of hands-on experience, the company has evolved from a specialized die workshop into a vertically integrated manufacturing partner that delivers stamping dies, sheet metal parts, checking fixtures, and welding jigs — all under one roof.

A Manufacturing Footprint Built for Scale

DIAN STAMPING's current production facility spans approximately 50,000 square meters, with a dedicated die workshop of around 4,000 square meters. A planned 35,000-square-meter expansion will add new press lines and advanced coating facilities, further strengthening the company's production capacity. The company employs roughly 110 people, including 35 experienced die designers and technicians, and produces approximately 2,000 sets of medium and small stamping dies annually, with an annual die turnover of around RMB 50 million.

These figures are not just numbers — they represent a level of operational maturity and investment that few China-based automotive stamping dies manufacturers can match. The scale of DIAN STAMPING's operations allows it to serve clients ranging from Toyota and Honda to BYD, KIA, Suzuki, and Geely, exporting to more than 10 countries worldwide.

Four Core Capabilities, One Integrated Workflow

What makes DIAN STAMPING particularly valuable to OEMs and Tier-1 suppliers is its ability to handle four distinct yet interconnected manufacturing disciplines. Rather than requiring customers to coordinate between separate suppliers for tooling, stamping, inspection, and assembly, DIAN STAMPING manages the entire process internally.

1. Precision Stamping Dies

DIAN STAMPING designs and manufactures progressive dies, transfer dies, and tandem dies for complex, large and medium-sized automotive parts. Using advanced CAD/CAM software (AutoCAD, SolidWorks, CATIA) combined with precision machining, the company delivers tooling that meets the demanding tolerances of modern vehicle production. Applications span body-in-white components, door systems, seating systems, instrument panels, fuel tanks, exhaust systems, and chassis parts.

2. Custom Sheet Metal Stamping Parts

Beyond tooling, the company produces high-quality custom sheet metal parts for automotive, household appliance, and industrial applications. Capabilities include processing of multiphase steel, aluminum alloys, stainless steel, and custom rolled steel. Secondary operations such as laser cutting, bending, welding, and powder coating are all performed in-house, ensuring consistent quality and shorter lead times.

3. Checking Fixtures for Quality Assurance

Every stamped part needs to be verified, and DIAN STAMPING's checking fixture division designs and builds high-precision inspection fixtures that allow rapid, repeatable dimensional verification of complex stamped components. These fixtures eliminate individual measurement variation and ensure that every part leaving the factory meets OEM-specified tolerances. Press dies and checking fixtures are delivered as a matched set, guaranteeing fit and function from the first production run.

4. Welding Jigs and Assembly Fixtures

Rounding out the production chain, DIAN STAMPING manufactures custom welding jigs and assembly fixtures that enable accurate, repeatable welding and assembly operations. Whether for spot welding, MIG/TIG welding, or robotic welding cells, the company's fixtures are designed to improve throughput while maintaining dimensional accuracy.

The Vertical Integration Advantage

DIAN STAMPING's structure includes affiliated companies such as Linhai Diyao New Technology Co., Ltd. and Taizhou Elay International Trade Co., Ltd., further strengthening its supply chain and export capabilities. The company is recognized as a National High-Tech Enterprise and holds IATF 16949, ISO 9001, and TUV certifications. These credentials are not just wall decorations — they reflect a systematic approach to quality management that is audited annually by global automotive clients.

Unlike many competitors who outsource heat treatment, surface finishing, or assembly, DIAN STAMPING has invested in automated production lines, R&D laboratories, and in-house electrophoresis and powder coating facilities. This vertical integration eliminates the quality variability and scheduling conflicts that arise when multiple subcontractors are involved. It also means faster turnaround: typical delivery for steel stamping dies is 30 to 40 days, and approximately 70 days for casting dies, depending on project complexity.

Material and Application Expertise

DIAN STAMPING's material processing capabilities cover a wide spectrum, including multiphase steel (for lightweight structural parts), aluminum alloys (for EV components and weight reduction), stainless steel (for corrosion-resistant applications), and custom rolled steel and welded plate (for heavy-duty structural components). These materials are processed into parts for seat systems, fuel tank systems, body-in-white structures, exhaust systems, door systems, clutch systems, dashboard systems, and chassis systems.

With the global automotive industry's accelerating shift toward electric vehicles, the ability to work with advanced high-strength steels and aluminum alloys has become a critical supplier qualification. DIAN STAMPING's experience in these materials positions it well to serve both traditional ICE vehicle programs and new-energy vehicle platforms.

Why Global OEMs Choose DIAN STAMPING

In a market crowded with stamping suppliers, DIAN STAMPING differentiates itself through three enduring commitments:

Stable Quality: IATF 16949 and ISO 9001-certified processes, combined with in-house checking fixture verification, ensure that every shipment meets or exceeds customer specifications.

Reliable Lead Times: Full control over the production chain means no waiting on external suppliers. From die design to final assembly, the timeline is managed internally.

Competitive Pricing: Factory-direct operations eliminate middleman markups, and the company's scale in die manufacturing allows it to offer pricing that is consistently attractive to cost-conscious OEMs.

For procurement teams evaluating new suppliers, the advantages are clear. A single point of contact, a single quality standard, and a single facility that handles everything from tool steel to finished assembly. In an industry where complexity is the enemy of reliability, DIAN STAMPING's vertically integrated model offers a simpler, more dependable path to production.