Problem
A poorly supported coil wobbles, feeds strip with edge damage and inconsistent tension, and forces the line to stop too often for coil changes, cutting output and producing edge-related weld defects.
Cause
Single-mandrel uncoilers hold the coil only partially, so strip pay-off tension fluctuates and the strip edge can be scored or deformed before it ever reaches the forming section, seeding downstream defects.
Solution
The ZY16 double-mandrel pneumatic uncoiler expands to grip the coil inner diameter firmly and feeds strip with controlled back tension. Paired with the 200m/min accumulator, it lets the line keep producing while the next 1.5-ton coil is prepared, so pay-off stays smooth and strip edges arrive undamaged.
Key Engineering Data
- Double-mandrel grip supports the coil ID on both sides.
- Pneumatic expansion holds the coil firmly without manual clamping.
- Controlled back tension protects thin strip edges during pay-off.
- Works with the accumulator for non-stop coil changeover.
| Parameter | Specification |
|---|
| Mill Model | ZY16 |
| Tube OD Range | Φ8-18 mm |
| Wall Thickness | 0.4-1.0 mm |
| Strip Width Range | 25-57 mm |
| Max Line Speed | 90 m/min |
| HF Welder Power | 100 kW Solid-State High Frequency |
| Strip Material | Hot Rolled / Cold Rolled / Galvanized Steel |
| Uncoiler | Double-Mandrel Pneumatic, 1.5-Ton Coil Capacity |
| Accumulator | 200 m/min High-Speed Cage |
| Strip Leveling | Seven-Roller Leveling Unit |
| Forming Stands | 5-Stand Rough + 3-Stand Precision |
| Roller Geometry | Double-Radius Forming Rollers |
| Roller Shafts | 42CrMo High-Strength Alloy Steel |
| Safety | Forming Stand Overload Protection |
Performance & Quality
The double-mandrel pneumatic uncoiler holds the coil ID firmly and feeds with controlled back tension, so thin strip pays off without edge damage. Combined with the accumulator, coil changeovers become non-stop, protecting edge quality and keeping the Φ8-18mm line productive.
Application
For continuous Φ8-18mm tube production where smooth strip pay-off and fast coil changeover keep the line productive and protect thin strip edges.
Selection Guide
Choose this uncoiler when you run 1.5-ton coils and need smooth, damage-free pay-off. Confirm your coil ID and OD so the mandrel expansion range matches your coil stock.
Application Scenarios
High-volume runs with frequent coil changes, thin-wall strip that must not be edge-damaged, and lines producing tube directly from 1.5-ton master coils.
FAQ
Q1. Why use a double-mandrel design?
It grips the coil ID on both sides for stable pay-off, reducing edge damage and tension fluctuation versus single-mandrel units that hold the coil only partially.
Q2. What coil weight does it accept?
Up to 1.5 tons per coil, matching the ZY16 uncoiler capacity, so you run longer between coil changes.
Q3. Does it stop the line for coil changes?
No, the accumulator stores strip so the forming line keeps running while the next coil is loaded and joined.
Q4. Is the pneumatic clamp adjustable?
Yes, the mandrel expands to grip the coil ID, and it is sized to your coil ID and OD at configuration.
Q5. Does the uncoiler mark thin strip?
No, the pneumatic mandrel and controlled back tension feed the strip smoothly, avoiding the edge scoring common with poorly supported coils.
Q6. Can the uncoiler be automated?
The pneumatic double-mandrel grip is already powered, and it can be integrated with the accumulator for semi-automatic coil changeover.
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