A decoiler, often referred to as an uncoiler, is a crucial auxiliary device in the automated processing of coiled sheet materials. Its main role is to hold and gradually uncoil the material, feeding it into a leveling machine, which facilitates automated stamping production. Heavy-duty decoilers are particularly notable for their high load capacity, customization options, and broad applicability.

Standard vs. Hydraulic Heavy-Duty Decoilers

Typically, standard heavy-duty decoilers employ manual expansion with four support plates to hold the coil. This design is well-established and widely used across various industries. However, sectors like automotive and hardware often handle wide and heavy coils, necessitating the use of hydraulic heavy-duty decoilers. These machines use hydraulic expansion instead of the traditional manual method, providing significant advantages but also facing notable challenges with very large loads.

Challenges Faced by Hydraulic Heavy-Duty Decoilers

Stability Issues During Uncoiling: When handling heavy sheet materials, the material can sag between the main machine and the decoiler, leading to poor stability and potential coil loosening. This affects the quality of uncoiling and leveling, and can reduce the equipment’s lifespan.

Safety and Installation Difficulties: The protective guards that prevent the coil from jumping off the spindle are difficult to install and have low safety margins.

Low Automation in Coil Loading: Many coil loading devices used with decoilers are manually operated, which is time-consuming and labor-intensive. This area requires significant improvements to enhance efficiency.

Innovative Solutions by Henli Machinery

To address these issues, Henli Machinery has developed an advanced heavy-duty hydraulic decoiler with several enhancements. These include a loading cart, material support arms, stop arms, pressure arms, and positioning columns. This innovative decoiler offers four key performance advantages:

  1. Enhanced Stability The pressure arm applies consistent pressure during uncoiling, ensuring stable uncoiling and preventing coil loosening. The combination of pneumatic stop arms and support arms effectively prevents material sagging during feeding, maintaining the quality of the uncoiling process.
  2. Reduced Friction and Improved Positioning Positioning columns create a gap between the coil and the backplate, reducing friction and ensuring stable uncoiling. This improvement enhances the overall efficiency and precision of the decoiling process.
  3. Automated Loading The hydraulic loading cart automates the loading process, making it safer and more convenient. This automation significantly reduces manual labor and increases operational efficiency.
  4. Improved Safety Pneumatic stop arms replace traditional A-type iron restraints to prevent the coil from jumping off the spindle. This enhancement not only improves safety but also simplifies the loading process, making it more user-friendly.

Operational Process of the Advanced Decoiler

In operation, the coil is placed on the hydraulic loading cart, and the hydraulic cylinder adjusts the height of the support mechanism. When the motor starts, the slide moves along the track, delivering the coil to the protective plate surrounding the main spindle of the decoiler. The end of the coil is then fed into the leveling machine, and the stop arms are moved towards the spindle, secured in a slot by the pneumatic cylinder. The pressure roller of the decoiler is pressed onto the coil by the cylinder, and the motor is activated, initiating the uncoiling process.


The advanced heavy-duty hydraulic decoiler by Henli Machinery represents a significant leap in the automated processing of coiled sheet materials. With its enhanced stability, reduced friction, automated loading, and improved safety features, it addresses the primary challenges faced by traditional decoilers. This innovation not only boosts productivity but also ensures a safer and more efficient operational environment, making it an invaluable asset in industries handling heavy and wide coils.