Cage Loop Accumulator

The cage accumulator is a commonly used material storage device in ERW tube mill production lines. It serves as a buffer between the uncoiler, shear and butt welder, and the forming mill, ensuring continuous production without interruption and improving the overall line efficiency.
The steel strip is stored helically around a vertical cage frame, maintaining stable strip tension and allowing quick feeding.

It is suitable for the production of carbon steel, stainless steel, and alloy steel pipes, especially for medium to high-capacity requirements.

Product Details

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Product Details

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Specification

It is suitable for the production of carbon steel, stainless steel, and alloy steel pipes, especially for medium to high-capacity requirements.

1. Application Solutions

Standard Solution:
Uncoiler → Shear & Butt Welder → Cage Accumulator → Forming Mill → Welding/Sizing → Flying Saw → Stacking.
High-Speed Upgrade:
Integrates with automatic uncoiler, double-head shear and butt welder, and PLC-based speed control for fully automated production lines.
Heavy-Duty Solution:
Reinforced cage frame with servo-controlled tension system, suitable for producing high-strength steel strips of thickness 3.0–4.5mm and above.

2. Technical Requirements

The cage frame must adopt high-strength welded structure, with shot blasting and anti-corrosion treatment.
Key rotating parts shall be equipped with imported bearings to ensure stable and vibration-free operation.
Tension control system must respond quickly to avoid strip slack or breakage.
Anti-strip-jumping devices must be installed for high-speed running safety.
Emergency stop system and protective fencing must meet CE or local safety standards.
Maintenance access doors must be provided for easy servicing.

3. Technical Specifications (Customizable)

Item	Parameter
Applicable Strip Width	60mm–600mm (customizable)
Applicable Strip Thickness	0.5mm–4.5mm
Storage Capacity	100m–250m (customizable)
Floor Space Required	Approx. L5m × W1m × H4m
Max. Strip Speed	80–120m/min (depends on line design)
Cage Frame Material	High-strength alloy steel
Tension Adjustment	Electric/Pneumatic control
Safety Features	Limit switches, anti-strip-jumping fence, emergency braking

4. Key Advantages of Cage Accumulator

Simple structure, cost-effective: About 20% lower cost compared to disk accumulators.
Easy maintenance: Mostly mechanical parts, simple and low-cost servicing.
Stable operation: Natural helical storage ensures uniform strip tension, reducing forming defects.
Strong adaptability: Suitable for various materials and strip thicknesses.
Moderate footprint: Saves about 30% of space compared to traditional horizontal accumulators.

5. Comparison Between Cage Accumulator and Disk Accumulator

Item	Cage Accumulator	Disk Accumulator
Investment Cost	Lower	Higher (requires heavy-duty drive systems)
Applicable Speed	Medium to high speed (up to 120m/min)	Ultra-high speed (up to 200m/min or more)
Footprint	Moderate	Larger
Storage Capacity	Large	Very large
Safety	High (with safety devices)	High
Maintenance Complexity	Low (mainly mechanical)	High (servo systems require maintenance)
Typical Applications	Standard ERW tube mills	Ultra-high speed, mass production lines

Summary:
If ultra-high speed (150m/min and above) is required, a disk accumulator is preferred.
For standard medium-high speed tube mills, a cage accumulator is the optimal choice considering cost and reliability.

6. Cage Accumulator Selection Guide

Production Line Parameters	Recommended Configuration	Notes
Strip Width ≤ 200mm	Small-size Cage Accumulator (Light Duty)	Storage capacity 100–150 meters
Strip Width 200–400mm	Standard Cage Accumulator (Medium Duty)	Storage capacity 150–200 meters
Strip Width ≥ 400mm	Large-size Cage Accumulator (Heavy Duty)	Storage capacity 200+ meters, reinforced structure
Strip Thickness ≤ 2.0mm	Standard Tension Control	Conventional motor or pneumatic control
Strip Thickness 2.0–4.5mm	Reinforced Tension Control	Requires high-response tension system
Line Speed ≤ 80m/min	Standard Mechanical Safety Devices	Regular emergency stop protection
Line Speed 80–120m/min	Enhanced Tension & Anti-Strip-Jumping System	Recommended to add emergency braking and reinforced guardrails
High Surface Protection Requirement	Non-contact Strip Guiding System	Prevents surface scratching, ideal for stainless steel strips
Limited Space (Low Factory Height)	Low-profile Cage Accumulator (Custom)	Custom design to reduce footprint
Continuous Production (High Automation)	Integrate with Shear & Butt Welder + PLC control	Recommended for automatic speed synchronization

【Notes on Selection】

Strip width and thickness are the basic criteria for selecting the cage accumulator model.
Line speed determines whether enhanced tension control and safety features are needed.
Factory layout restrictions and surface protection needs should be communicated early for tailored designs.
For cost-performance balance, the standard medium-duty cage accumulator is recommended for most ERW production lines.

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

What strip dimensions are suitable for the cage accumulator?

Generally suitable for strip widths of 60–600mm and thicknesses of 0.8–4.5mm. Special sizes can be customized.

Will the strip get tangled or jump off at high speeds?

No. Proper cage design, dynamic tension control, and anti-jumping mechanisms effectively prevent tangling and strip loss.

Is installation complicated?

No. The mechanical structure is relatively simple, and installation and commissioning can usually be completed within two days.

Why choose a cage accumulator instead of a disk accumulator?

The cage accumulator is ideal for medium to high-speed tube lines, offering large storage capacity, moderate footprint, lower cost, and easier maintenance.

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