Double Head Uncoiler for Tube Mill Line

What Is a Double Head Uncoiler?

A Double Head Uncoiler is used at the beginning of a tube mill line to hold and unwind steel coils, feeding steel strip into the forming and welding section.

It features two coil-holding heads, allowing operators to prepare the next coil while the current coil is running, reducing changeover time and improving production efficiency.

How Does a Double Head Uncoiler Work?

A Double Head Uncoiler typically consists of two coil-holding heads, an expansion mechanism, a supporting frame, and a drive system, depending on the machine design.

Its working process includes the following steps:

1. ✅Coil Loading: A steel coil is loaded onto one of the uncoiler heads.
   
2. ✅Coil Clamping: The expansion mechanism secures the coil on the mandrel.
   
3. ✅Strip Unwinding: The steel strip is fed into the tube mill line for forming and welding.
   
4. ✅Coil Changeover: While the current coil is running, the next coil can be prepared on the other head. When the current coil is finished, the machine switches to the next coil according to its design and operating procedure.
   

The actual changeover process depends on the machine configuration and the strip-joining arrangement. A double head uncoiler helps shorten coil changeover time, but uninterrupted production also depends on how the strip ends are connected and how the line is configured.

Main Types of Uncoilers for Tube Mill Lines

Different tube mill lines require different uncoiler configurations. The following table compares three common types to help you choose the right solution.

The right uncoiler depends on coil weight, strip width, coil inner diameter, production speed, and changeover requirements. A double head uncoiler focuses on faster coil changeover, while a double cone uncoiler uses a conical support arrangement suitable for specified coil-handling requirements.

Key Features of a Double Head Uncoiler

Two Coil-Holding Heads

The two-head design allows operators to prepare the next coil while the current coil is running, helping reduce changeover time and improve production efficiency.

Hydraulic Expansion

Many double head uncoilers use hydraulic expansion to secure the steel coil on the mandrel. This makes coil clamping and release more convenient during loading and unloading.

The expansion method and hydraulic configuration depend on the selected model.

Optional Baffle Arm

A Baffle Arm helps control the outer wraps of a steel coil and prevent them from loosening or spreading during unwinding.

It can be included or omitted according to the coil characteristics and machine configuration. The need for a baffle arm depends on factors such as coil stability, dimensions, and operating requirements.

Drive System

Depending on the design, an uncoiler may use a powered drive or a passive unwinding arrangement. The drive and braking configuration should be selected according to the coil specifications and the operating requirements of the tube mill line.

How to Choose the Right Uncoiler for Your Tube Mill

Selecting the right uncoiler helps ensure reliable coil handling and smooth strip feeding. Before choosing a model, consider the following information:

• Maximum Coil Weight: Determines the required load capacity and helps identify whether a standard or heavy-duty configuration is needed.
  
• Coil Width: The uncoiler must accommodate the width of the steel strip.
  
• Coil Inner Diameter: The mandrel or conical support must match the coil's inner diameter.
  
• Coil Outer Diameter: Determines the required space for coil loading and unwinding.
  
• Strip Thickness and Material: These affect the coil characteristics and unwinding requirements.
  
• Tube Mill Production Speed: The uncoiler must supply strip at a rate compatible with the production line.
  
• Required Configuration: Consider hydraulic expansion, the drive system, an optional baffle arm, and the coil changeover method.
  

For relatively heavy steel coils, a suitable double cone uncoiler may be considered based on the coil specifications and load capacity. For production lines requiring faster coil changeovers, a double head uncoiler may be a suitable choice.

The final selection should be based on the actual production requirements rather than the machine type alone.

Looking for an Uncoiler for Your Tube Mill Line?

AIS Machinery provides uncoiling solutions for tube mill lines, with configurations selected according to steel coil specifications and production requirements.

To help us recommend a suitable uncoiler, please provide the following information:

• Maximum coil weight
  
• Steel strip width and thickness
  
• Coil inner diameter and outer diameter
  
• Steel material
  
• Tube mill production requirements
  

Contact AIS Machinery to discuss your project and find the right uncoiler for your tube production line.