In the realm of punch press automation for processing production, various methods are employed to optimize efficiency. One such approach is the dual-strip stamping method, which has gained popularity as an alternative to traditional single-strip processing. By leveraging dual-strip stamping, manufacturers aim to maximize the utilization of punch presses. However, this shift introduces new challenges, particularly in selecting the appropriate feeders for the stamping process. In this article, we will delve into the considerations involved in choosing the right feeder for dual-strip stamping, offering valuable insights for stamping manufacturers.

Exploring Dual-Strip Stamping

Dual-strip stamping encompasses two main types: same-direction dual-strip and bi-directional dual-strip. Each type requires a specific feeder selection to ensure seamless integration with the stamping press. Let’s examine these types in detail:

Same-Direction Dual-Strip Stamping

Same-direction dual-strip processing can be executed in two ways: using a single set of dies with two feeding openings or employing two separate vertical dies. When determining the feeder configuration, three crucial factors come into play:

a) Thickness Similarity

The first factor to consider is whether both strips share the same thickness (width is irrelevant in this context). If the thickness of the two strips is equal, further evaluation is necessary.

b) Consistent Lower Die Height

The second factor pertains to the height of the lower die, also known as the die feed line height. For same-direction dual-strip stamping, both strips should have an identical lower die height to ensure optimal performance.

c) Uniform Feed Pitch

The third factor revolves around the required feed pitch, which refers to the feeding length for both strips. For efficient stamping, it is essential that the feed pitch remains consistent across the two strips.

If all three key factors align, a single decoiler placed before and after the stamping process, accompanied by an NC servo feeder (or a dual-strip gripper feeder for high-speed scenarios), can be employed to transport the two strips seamlessly.

However, if any of the three factors deviate, an alternate approach is necessary.

Bi-Directional Dual-Strip Stamping

Bi-directional dual-strip stamping employs bi-directional feed dies. This method demands the use of two distinct feeder models: one installed on the side of the press and another at the front. The following feeder combinations are typically employed:

  • For side installation: a high-speed roller feeder (or NC servo feeder)
  • In the middle: an NC servo feeder
  • For high-speed stamping: two high-speed gripper feeders

To ensure optimal performance, the selected feeder models are matched with suitable decoiler equipment.

Enhancing Punch Press Efficiency

By adopting dual-strip stamping, manufacturers can harness the full potential of punch press utilization. Understanding the nuances of same-direction and bi-directional dual-strip stamping, as well as the corresponding feeder requirements, enables informed decision-making. Whether it’s selecting the appropriate feeder models for bi-directional stamping or evaluating the three key factors for same-direction stamping, optimizing the utilization of punch presses becomes a viable reality. Stay ahead of the curve and unlock the true potential of punch press automation with dual-strip stamping and the right choice of feeders.


Dual-strip stamping offers a promising solution for manufacturers aiming to maximize punch press utilization. By implementing this method, manufacturers can take advantage of simultaneous processing, resulting in enhanced efficiency and increased production output. Whether it’s same-direction dual-strip stamping or bi-directional dual-strip stamping, selecting the appropriate feeders and considering key factors such as thickness, lower die height, and feed pitch are crucial for successful implementation.

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