Moving a stamped metal part from design concept to production-ready volume is one of the most demanding challenges in automotive manufacturing. Engineering changes, tooling delays, inconsistent quality, and fragmented supply chains can derail even the most meticulously planned launch. The solution lies in choosing a partner with the depth and breadth to manage every stage under one roof.

A Vertically Integrated Partner with 20+ Years of Experience

Founded in 2003 and headquartered in Linhai, Zhejiang Province, LINHAI DIAN MOULD CO., LTD (DIAN STAMPING) has spent more than two decades serving global automotive OEMs and Tier 1 suppliers. Unlike many brokers or trading companies, DIAN STAMPING operates as a true factory — a modern sheet metal part manufacturer with approximately 50,000 m² of production space, a dedicated die workshop of 4,000 m², and a planned 35,000 m² expansion featuring new press and coating lines. With around 110 employees, including 35 die designers and technicians, the company delivers an annual capacity of roughly 2,000 sets of medium and small stamping dies.

From Prototype to Production: A Seamless Journey

One of the biggest pain points for automotive buyers is the handoff between prototype development and production ramp-up. When prototype and production are handled by different suppliers, miscommunication, tolerance stack-ups, and timeline misalignment are almost inevitable. DIAN STAMPING eliminates this risk by offering a unified workflow that covers every phase of the part lifecycle.

Need prototype sheet metal parts for design validation or pre-production testing? The company's in-house engineering team works directly from 2D drawings, 3D CAD data, or physical samples — using AutoCAD, SolidWorks, and CATIA to develop tooling and part geometries that are production-ready from the start. Once the prototype is approved, the same team carries the project forward into volume production with matched tooling, consistent processes, and traceable quality documentation. This continuity dramatically reduces time-to-market and eliminates the costly rework that often occurs when switching suppliers mid-stream.

Comprehensive Stamping Die Capabilities

At the heart of DIAN STAMPING's manufacturing capability is its die shop, which produces a full range of high-precision stamping tooling. The company designs and builds progressive dies, transfer dies, and tandem dies for complex, large, and medium-sized parts. Whether the application is a body-in-white structural component formed from high-tensile steel, a door system panel requiring tight dimensional control, or a seating system bracket needing multi-stage progressive forming, the in-house die team has the experience to deliver.

Materials processed include multiphase steel, aluminum, custom rolled and welded plate, and stainless steel — giving DIAN STAMPING the flexibility to support lightweighting initiatives and electric vehicle programs alongside traditional ICE platforms. The typical lead time for steel stamping dies is 30 to 40 days, with casting dies delivered in approximately 70 days, depending on part complexity and project scope.

Custom Sheet Metal Parts with Full Secondary Processing

Beyond tooling, DIAN STAMPING produces a wide range of custom sheet metal parts for the automotive, household appliance, and industrial sectors. The company's stamping capabilities are complemented by a full suite of secondary processes:

This vertically integrated approach means that buyers receive fully finished components — from raw material to stamped, welded, coated, and assembled parts — from a single source, eliminating the logistical overhead of managing multiple vendors.

Quality Assurance with Integrated Checking Fixtures

Quality control is built into the manufacturing process, not bolted on at the end. DIAN STAMPING designs and builds its own checking fixtures — GD&T-compliant inspection tools that enable rapid, repeatable dimensional verification of stamped components. By delivering press dies and checking fixtures as a matched set, the company ensures that every part produced on the production floor can be verified against the same datum structure used during tool tryout. This closed-loop quality system is aligned with ISO 9001 standards and follows IATF 16949-oriented automotive manufacturing practices.

Welding Jigs and Assembly Fixtures

For customers who require welded sub-assemblies, DIAN STAMPING provides custom welding jigs and assembly fixtures designed for accuracy and repeatability. Robotic and manual welding stations are supported by in-house jig design and fabrication, allowing the company to take projects from individual stampings through to fully welded assemblies ready for shipment. This capability is particularly valuable for body-in-white, chassis, exhaust, and seating system applications where weld quality and dimensional stability are critical.

Proven Track Record with Global OEMs

DIAN STAMPING's customer base includes KIA, BYD, Toyota, Honda, Suzuki, and Geely, among others. The company exports to more than 10 countries, serving automotive OEMs and Tier suppliers who require consistent quality, competitive pricing, and reliable delivery. Factory-direct pricing — without intermediary markups — is a structural advantage of working directly with the manufacturer.

Why Choose DIAN STAMPING?