Cage Loop for ERW Tube Mill

Cage Loop in ERW Tube Mill

Improve your ERW tube mill productivity with a reliable Cage Loop. It provides continuous strip feeding during coil change, minimizing downtime and stabilizing the forming process. Compact design saves space while maintaining efficient material storage. Suitable for various strip sizes and steel types, with flexible customization options. Learn the difference between cage loop and horizontal accumulator to select the best solution.

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Product Details

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Specification

What is a Cage Loop?

A Cage Loop is a material storage system used in an ERW tube mill line. Its main job is to temporarily store steel strip so that the production line can keep running continuously—even when changing coils.

Think of it as a buffer zone between processes. When the upstream section stops (like during coil change or welding), the cage loop feeds stored material to the forming section, preventing downtime.

Why is Cage Loop Important?

Without a cage loop, every coil change would require stopping the entire tube mill. This leads to:

Production interruptions
Lower efficiency
More material waste

With a cage loop, you get:

✅ Continuous production
✅ Higher efficiency
✅ Reduced downtime
✅ Stable forming process

How Does a Cage Loop Work?

The steel strip enters the cage loop and is stored in a vertical spiral or “cage-like” structure.

When upstream is running → strip is stored
When upstream stops → stored strip is released
Downstream forming section → keeps running without interruption

This ensures a smooth and stable material flow into the tube forming section.

Position in ERW Tube Mill Line

The cage loop is typically installed between:

👉 Slitting Line / Uncoiler & Shear-Welder
👉 Forming Section (Roll Forming Mill)

Process Flow Example:

Uncoiler → Shear & Welder → Cage Loop → Forming → Welding → Sizing → Cutting

Key Functions of Cage Loop

Store strip material temporarily
Synchronize speed between upstream and downstream
Prevent line stoppage during coil change
Improve overall production efficiency
Protect strip from tension fluctuation

Technical Parameters (Typical Range)

Item	Specification
Strip Width	100 – 800 mm
Strip Thickness	0.5 – 6.0 mm
Accumulation Capacity	100 – 400 meters
Line Speed	Up to 120 m/min (depending on design)
Loop Type	Vertical cage structure
Control System	Automatic speed synchronization
Material Type	Carbon steel, stainless steel

(Parameters can be customized based on your project requirements.)

Cage Loop vs Horizontal Spiral Accumulator

Both systems are used for material storage, but they have different structures and applications.

Feature	Cage Loop (Vertical)	Horizontal Spiral Accumulator
Structure	Vertical cage	Horizontal spiral
Space Requirement	Smaller footprint	Larger floor space
Accumulation Capacity	Medium	Large
Strip Thickness	Suitable for thicker materials	Better for thin strip
Stability	High stability for medium/heavy strip	Very stable for high-speed thin strip
Maintenance	Easier access	More complex
Investment Cost	Lower	Higher
Application	Standard ERW tube mill	High-speed precision lines

How to Choose the Right Accumulator?

Choose Cage Loop if:

You have limited workshop space
Your material is medium or thick
You want a cost-effective solution

Choose Horizontal Spiral Accumulator if:

You run high-speed production
Your material is thin strip
You need larger storage capacity

FAQ

Q: Can cage loop handle stainless steel?
A: Yes, it can handle both carbon steel and stainless steel.

Q: Is it suitable for high-speed production?
A: Yes, but for very high-speed and thin strip, a horizontal accumulator may be better.

Q: Can it be customized?
A: Absolutely. We design based on your strip size, speed, and plant layout.

Q: Will the strip surface be scratched inside the cage loop?
A: No. A well-designed cage loop uses smooth guiding systems and controlled tension to protect the strip surface, even for stainless steel.

Q: Is automatic control necessary for a cage loop?
A: Yes. Automatic speed synchronization ensures stable strip flow between upstream and downstream, preventing tension issues and improving efficiency.

RELATION EQUIPMENT

We provides all equipment to tube mill entry section:

Coil Car

Single And Double Heads Un-coiler & Hydraulic And Pneumatic Un-coiler

Peeler and hold down roll arm

Flattening Machine

Automatic and Semi Auto Shearer & Butt Welder

Vertical Cage Accumulator & Horizontal Loop Accumulator & Landing Horizontal Spiral Loop Accumulator

disc accumulator to storage strip

erw tube mill feeding section

OUR SERVICE

Why Choose Us?

Leading Technology, Reliable Quality, Excellent Service!

Optimized Design, High quality material select!

Heat treatment process guarantee!

Spiral bevel gear, drum gear coupling and carburization.

Gear teeth quenching.

Driven system stable, efficient and wearable with lower noise.

High precision wear resisting and Long life of rollers.

All the machine Lathes, Key Grooves are positioned and Milled by CNC.

ais machinery exhibition attend

After-sales service

1.We will delivery the machine and provide the documents on time to make sure you can get the machine quickly

2.When you finish the Preparation conditions, Our fast and professional aftersales service engineer team will go to your factory to install the machine, give you the operating manual, And train your employee until they can operate the machine well.

3.We provide one year warranty and life-long technical support.

4.Well-trained & experienced staff are to answer all your inquiries in English and Chinese

5 .24 hours for engineer response.

6.Your business relationship with us will be confidential to any third party.

Quality Control

We have the single quality department, that make sure the material of the raw materials is good, and ensure the machine running smoothly.

ais machinery after service and quality control

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Cage Loop Accumulator FAQ

Can cage loop handle stainless steel?

Yes, it can handle both carbon steel and stainless steel.

Is it suitable for high-speed production?

Yes, but for very high-speed and thin strip, a horizontal accumulator may be better.

Can it be customized?

Absolutely. We design based on your strip size, speed, and plant layout.

Will the strip surface be scratched inside the cage loop?

No. A well-designed cage loop uses smooth guiding systems and controlled tension to protect the strip surface, even for stainless steel.

Is automatic control necessary for a cage loop?

Yes. Automatic speed synchronization ensures stable strip flow between upstream and downstream, preventing tension issues and improving efficiency.

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