Automated Coil Feeding Line for Precision Stamping of Small Metal Parts
For metal fabricators and stamping shops, floor space is prime real estate. Juggling a separate decoiler and straightener consumes valuable square footage and creates production bottlenecks.
The integrated Decoiler Straightener 2-in-1 machine solves this by combining two critical functions into a single, streamlined unit. This guide explains how this all-in-one solution saves space, reduces costs, and boosts productivity for industries like automotive, appliance manufacturing, and construction.
The Challenge: Inconsistency, Waste, and Downtime
The primary challenges faced by the facility included:The facility faced critical pain points common in manual and semi-automated setups:
Inconsistent Feeding: Manual loading caused part misalignment and defects.
High Material Wastage: Coil curls and improper handling led to significant scrap loss.
Frequent Downtime: Constant adjustments and maintenance disrupted production flow.
Inflexibility: The old system could not adapt to varying material thickness or coil width quickly.
The Solution: A Custom-Designed, Automated Feeding System
The core solution was a coil feeding line designed for seamless automation from coil unwind to press feeding. The key components were:
Decoiler: Automatically unwinds the metal coil.
Straightener (2-in-1 Machine): Flattens the metal strip, removing all curls and bends to ensure perfect material entry.
NC Servo Feeder: The heart of precision. This programmable feeder provides exact control over feed length and speed. A critical customization was designing a floor-standing NC servo feeder with an extended discharge frame. This was essential to integrate with the customer's older punch press model that had triangular brackets and a glass guard, making direct mounting impossible.
Implementation & Customization Process
Successful integration required a tailored approach:
System Customization: The entire line was customized for specific materials (steel, aluminum). The NC servo feeder was programmed for various part designs.
Seamless Integration: The floor-standing feeder was strategically placed to allow smooth material flow from the straightener into the existing stamping press and molds.
Testing & Training: Rigorous testing with different materials ensured optimal performance. Comprehensive operator training guaranteed smooth adoption.

Tangible Results & ROI
The investment delivered measurable, high-impact returns:
30% Reduction in Stamping Defects due to precise material positioning.
20% Less Material Wastage from eliminated coil curls.
25% Increase in Production Speed through automation and reduced downtime.
Lower Operational Costs from reduced manual labor and minimal error.
Enhanced Flexibility to switch between jobs with quick programmable changes.
Conclusion: A Strategic Upgrade for Modern Stamping
For manufacturers of small metal parts, upgrading to an automated coil feed line is a strategic move. It directly addresses core production challenges, turning bottlenecks into competitive advantages. This case proves that even with older press equipment, a customized feeding solution can unlock new levels of precision stamping efficiency and product quality.
Ready to transform your metal stamping productivity? Contact Sunrui today to discuss a customized coil feed line solution for your specific press and production needs.