Core Technology — Cold Extrusion Forming

Process Overview

How Cold Extrusion Forming Works

Cold extrusion forming (also called cold forging) shapes metal billets at room temperature under high compressive force. The material flows through a precisely designed die, taking the desired shape without heating — resulting in improved mechanical properties, tight dimensional tolerances, and excellent surface finish.

Because the process operates below the recrystallization temperature, there is no oxidation or scale formation, and the grain structure is refined through work hardening — producing components that are stronger than their machined equivalents.

Room-temperature forming — no oxidation or scale
Work-hardened grain structure — improved strength
Near-net-shape — minimal secondary machining
High repeatability — consistent batch quality

Cold extrusion forming equipment and process

Technical Advantages

Why Cold Extrusion

Compared with conventional machining, hot forging, or casting, cold extrusion forming delivers measurable advantages across quality, cost, and efficiency.

High Material Utilization

Near-net-shape forming reduces material waste to a minimum — typically far higher material yield than cutting or machining from solid stock.

Dimensional Precision

Tight tolerances and excellent surface finish directly from the die, reducing or eliminating the need for secondary finishing operations.

Improved Mechanical Properties

Cold working refines the grain structure and work-hardens the material, producing components with higher strength and fatigue resistance.

Production Efficiency

High-volume, repeatable production with short cycle times — well suited to automotive and industrial component manufacturing.

Broad Material Range

Aluminum, copper, carbon steel, alloy steel, and stainless steel — process parameters are tuned to each material's flow characteristics.

Independent Process Control

Equipment parameters, die design, and lubrication processes are developed in-house — giving full control over quality and continuous improvement.

Rentong Forging equipment and production parameters

Independent Development

Equipment & Process Parameters

Our equipment parameters — including press force profiles, die geometry, material flow control, and lubrication regimes — are developed and refined through years of production experience. This in-house capability means every parameter is understood, documented, and continuously optimized.

Rather than relying on off-the-shelf configurations, we design and tune production lines around the specific requirements of each component and material — ensuring that the process delivers consistent results across production runs.

Hydraulic press force & speed profiling
Die design & material selection
Lubrication & surface treatment processes
Quality inspection & process monitoring

Technology Frontier

Ongoing Development Directions

We continue to advance cold extrusion forming technology — exploring new materials, higher precision, and integrated production solutions.

Advanced Materials

Process development for high-strength alloys, titanium, and specialty metals — expanding the range of components that can benefit from cold extrusion.

Precision Die Technology

Continuous improvement in die design, surface treatment, and tool life — directly translating to tighter tolerances and lower per-unit tooling cost.

Integrated Production Lines

End-to-end production solutions combining forming, heat treatment, inspection, and packaging — designed for maximum throughput and quality consistency.

Process Digitalization

Data-driven process monitoring and parameter optimization — using production data to refine processes and predict maintenance needs.

Cold Extrusion Forming Technology