In the world of sheet metal coil processing, achieving automation is crucial for efficiency and productivity. A pivotal component in this process is the decoiler, responsible for unwinding and positioning sheet metal coils. Different types of decoilers have been designed based on the specific properties of the coil and the requirements of the stamping process. In this article, we will delve into the five types of decoilers, focusing on the exceptional pallet decoiler, a horizontal feeding and unwinding device that takes the lead in high-speed and high-precision stamping scenarios.

1. The Light Decoiler: A Versatile Vertical Feeding Device

The first decoiler type on our list is the light decoiler, a vertical feeding device. It involves fitting the coil’s inner diameter onto the winding shaft and securing it to release the material. The light decoiler is highly customizable, allowing adjustments for inner diameter, outer diameter, and load capacity. It is suitable for various material thicknesses and widely used in the stamping industry. However, it comes with a significant drawback – its slow unwinding speed, around 16m/min, and the need for frequent machine stoppages for speed adjustments. This limitation renders it less suitable for high-speed and precision processing scenarios.

2. The Decoiler: Another Vertical Feeding Device

Similar to the light decoiler, the standard decoiler is also a vertical feeding device. It shares the same method of fitting the coil’s inner diameter onto the winding shaft for material release. Like the light decoiler, it offers high customizability for inner diameter, outer diameter, and load capacity. While it serves well in various material thicknesses, it too suffers from the slow unwinding speed and frequent stoppages for speed adjustments.

3. The Hydraulic Decoiler: Enhancing Vertical Feeding

The third type of decoiler, the hydraulic decoiler, is yet another vertical feeding device. Its inner diameter fitting and material release process are similar to the light and standard decoilers. However, the hydraulic decoiler incorporates hydraulic mechanisms to ease the unwinding process. Despite this improvement, it still shares the common drawback of slow unwinding speed and the need for frequent adjustments during high-speed processing.

4. The Double Head Decoiler: Efficiency with Dual Shafts

Our fourth decoiler type, the double head decoiler, stands out with its dual shafts for material unwinding. It follows the same vertical feeding approach, using inner diameter fitting for material release. The double head decoiler’s dual shafts allow for faster material unwinding, improving efficiency to some extent. Nonetheless, it shares the common limitation of slow unwinding speed and the need for machine stoppages for speed adjustments during high-speed processing.

5. The Pallet Decoiler: A Revolution in High-Speed and High-Precision Stamping

Finally, we come to the star of the show, the pallet decoiler. Unlike its vertical feeding counterparts, the pallet decoiler takes a horizontal approach to material unwinding. It utilizes a flat loading tray, eliminating the need for inner diameter fitting, and allows for the stacking of multiple coils. This ingenious design significantly reduces loading time. However, the true brilliance of the pallet decoiler lies in its unmatched high unwinding speed, reaching up to 30m/min.

Seamless Synchronization for Unrivaled Performance

What truly sets the pallet decoiler apart is its ability to automatically adjust the unwinding speed to synchronize with downstream leveling or feeding machines. This automation eliminates the need for manual machine stoppages and adjustments. The pallet decoiler incorporates a swing arm with a material support wheel connected to its lower end and a potentiometer attached to the other end. The potentiometer’s output is linked to the electronic IC board, which, in turn, connects to the motor frequency controller.

The swing arm’s sagging varies with the unwinding speed. As the downstream leveling or feeding machine accelerates, the sagging decreases, causing the material support wheel to move upward. Conversely, when the downstream machine slows down, the sagging increases, and the material support wheel moves downward. These movements are detected by the potentiometer, resulting in changes in resistance values. The electronic IC board processes this data and outputs an analog signal to the motor frequency controller. The controller then adjusts the pallet decoiler’s operational speed, ensuring perfect synchronization with the downstream machine.

In conclusion, while various decoiler types serve well in sheet metal coil processing, the pallet decoiler emerges as the champion of high-speed and high-precision stamping scenarios. Its horizontal unwinding approach, unmatched unwinding speed, and seamless synchronization with downstream machines make it a revolutionary choice for achieving automated production in the stamping industry. Embracing the pallet decoiler can undoubtedly elevate productivity and efficiency to new heights, setting your production line apart from the competition.

Pallet Decoiler
Pallet Decoiler