Double head decoiler | dual spindle uncoiler
Double Head Decoiler Machine for Press Feeding Lines
Henli double head decoiler machinesโalso called dual-spindle or double-spindle uncoilersโsupport steel coil and metal strip stamping lines that need two-coil loading, quicker coil changeover, and stable strip unwinding. The series covers MTD-A non-motorized pull-off models, MTD-B motorized active-uncoiling models, and custom high-speed loop-control versions for demanding automated lines.
Quick selection
Which Double Head Decoiler Should You Choose?
MTD-A Non-Motorized
Choose this pull-off type when the downstream S-loop straightener, leveler, or feeder has enough traction force and the stamping line needs fast response.
- Listed table speed: 60 m/min; verify the approved coil, brake and downstream traction
- Best for short-pitch high-speed stamping
- Brake handwheel and pneumatic positioning lock
- Common for motor stators, rotors, EI laminations, and silicon steel stamping
MTD-B Motorized
Choose this active driven type when the coil is heavier, the material is thicker or more sensitive, or the line benefits from a motor-driven coil release.
- Typical speed: 20 m/min
- Motorized drive and controlled unwinding
- Custom 5T and 10T single-side configurations are available from HENLI
- Reduces pulling load on downstream equipment
High-Speed Custom Version
Choose this when the motorized decoiler must follow the changing speed of a high-speed automated line through laser or ultrasonic loop sensing.
- 35 m/min smart variable-speed solution
- 60 m/min ultra-high-speed solution
- Laser or ultrasonic material loop control
- Used for EV motor core and high-speed precision stamping lines
MTD-A series
Machine Info: Non-Motorized Double Head Decoiler
The non-motorized double head decoiler is used for uncoiling material in press feeding lines and can load two coils at the same time. It is especially suitable for high-speed stamping lines where the downstream leveler or feeder pulls the strip directly.
MTD-A features
Fast Changeover Structure and Pull-Off Control
Efficiency revolution: The double-spindle structure lets operators load a new coil on the idle spindle while the active spindle is still feeding production. When one coil finishes, the turret head rotates 180 degrees to switch, reducing coil changeover time and supporting continuous output.
Zero-downtime changeover boundary: HENLI can engineer a confirmed double-head setup for zero-downtime coil changeover and up to 90% reduction in coil-change downtime. These are project outcomes, not universal machine ratings. They require offline preparation of the idle spindle, an approved joining or changeover method, adequate buffer and controls, a defined operator sequence, and a witnessed acceptance baseline.
Optimized for high-speed precision: The non-motorized pull-off version is a strong partner for high-speed stamping lines, typically paired with S-type loop levelers and gear feeders.
- Non-motorized pull-off design: The unwinding action is driven by the pulling force from downstream equipment such as an S-loop straightener.
- Brake handwheel: The mechanical brake handwheel adjusts resisting torque. It is not a measured-tension controller, and the setting must be verified for the approved coil and downstream pull.
- Space and energy saving: The compact structure requires no motor and no large buffer loop, saving floor space and energy.
- Dual-spindle structure: The double-drum design supports offline loading and rapid 180-degree turret switching.
- Pneumatic positioning lock: A pneumatic pin locks the turret after rotation, helping keep material tracking stable into the feeder.
The Principle of the Brake Device
The brake applies resisting torque to limit coil overrun as downstream pull changes or stops. Required brake torque and stop behavior must be verified for the approved coil and line; the brake is not a closed-loop tension controller.
MTD-A data table
Non-Motorized Double Head Decoiler Data Table
Switch units for width, thickness, coil diameter, speed, and load reference.
| Model | MTD-200A | MTD-300A | MTD-400A |
|---|---|---|---|
| Material width (mm) | 200 | 300 | 400 |
| Material thickness (mm) | 0-2.0 | 0-3.0 | 0-3.0 |
| Material inner diameter (mm) | 450-530 | 450-530 | 450-530 |
| Material outer diameter (mm) | 1200 | 1200 | 1200 |
| Uncoiling speed (m/min) | 60 | 60 | 60 |
| Coil weight (kg) | 500 x 2 | 800 x 2 | 1200 x 2 |
| Model | MTD-200A | MTD-300A | MTD-400A |
|---|---|---|---|
| Material width (in) | 7.87 | 11.81 | 15.75 |
| Material thickness (in) | 0-0.079 | 0-0.118 | 0-0.118 |
| Material inner diameter (in) | 17.72-20.87 | 17.72-20.87 | 17.72-20.87 |
| Material outer diameter (in) | 47.24 | 47.24 | 47.24 |
| Uncoiling speed (ft/min) | 197 | 197 | 197 |
| Coil weight (lb) | 1,102 x 2 | 1,764 x 2 | 2,646 x 2 |
Note: Imperial values are rounded for selection reference. Henli can customize the inner diameter, outer diameter, and maximum load weight according to the buyer's coil data and production layout.
High Speed Lamination Stamping Line
Used for punching motor stator and rotor, EI sheet, and related high-speed lamination applications.
MTD-B series
Machine Info: Motorized Double Head Decoiler
The motorized double head decoiler is used when the production line needs active uncoiling, heavier coil handling, smoother material release, or reduced pulling load on downstream equipment. It can load two coils at the same time and supports motorized switching and feeding control.
MTD-B features
Key Features of the Motorized Type
Motorized Dual-Spindle Design
Two expansion mandrels are mounted 180 degrees apart on a central turret. While one mandrel is actively uncoiling, the other is available for offline loading by forklift or crane.
Powerful Motorized Drive
The unit is driven by a geared motor through a chain and sprocket system, supporting motor-driven buffer supply with response verified against the approved line.
Robust Compact Architecture
The wide support base and compact chassis support heavy loads with stable operation while keeping the machine practical for production floor layouts.
High-Efficiency Double-Head Decoiling System (5T Capacity)
Engineered for high-speed production lines, this electric dual-head uncoiler features a robust cantilever design with a 5-ton single-side loading capacity. The dual-spindle configuration supports smoother coil switching and provides stable motorized decoiling for light to medium-duty metal processing.
Heavy-Duty Electric Dual-Head Uncoiler (10T per Side)
HENLI can engineer and manufacture this heavy-duty configuration with a 10-ton single-side loading capacity, providing up to 20 tons total across both sides. The frame, shaft, bearings, drive, support and foundation arrangement are matched to the customer's actual coil and line data.
MTD-B data table
Motorized Double Head Decoiler Data Table
Switch units for model comparison before sending coil and line-speed data.
| Model | MTD-200B | MTD-300B | MTD-400B |
|---|---|---|---|
| Material width (mm) | 200 | 300 | 400 |
| Material thickness (mm) | 0-2.0 | 0-3.0 | 0-3.0 |
| Material inner diameter (mm) | 450-530 | 450-530 | 450-530 |
| Material outer diameter (mm) | 1200 | 1200 | 1200 |
| Uncoiling speed (m/min) | 20 | 20 | 20 |
| Coil weight (kg) | 500 x 2 | 800 x 2 | 1200 x 2 |
| Motor (HP) | 1/2 x 2 | 1 x 2 | 2 x 2 |
| Model | MTD-200B | MTD-300B | MTD-400B |
|---|---|---|---|
| Material width (in) | 7.87 | 11.81 | 15.75 |
| Material thickness (in) | 0-0.079 | 0-0.118 | 0-0.118 |
| Material inner diameter (in) | 17.72-20.87 | 17.72-20.87 | 17.72-20.87 |
| Material outer diameter (in) | 47.24 | 47.24 | 47.24 |
| Uncoiling speed (ft/min) | 66 | 66 | 66 |
| Coil weight (lb) | 1,102 x 2 | 1,764 x 2 | 2,646 x 2 |
| Motor (HP) | 1/2 x 2 | 1 x 2 | 2 x 2 |
Note: Imperial values are rounded for model comparison. The tables above show standard reference configurations, not HENLI's manufacturing capability ceiling. HENLI can custom-build 5T and 10T single-side motorized versions, with up to 20 tons total dual-side capacity; the final structure is configured from the actual coil and line data.
Configuration comparison
Motorized vs. Non-Motorized Dual-Head Uncoilers
Non-Motorized (Passive)
- Working principle: Pulled directly by the straightener or servo feeder.
- Response: Driven by downstream traction; start/stop behavior must be verified with the approved coil, brake and pulling machine.
- Best application: High-speed, short-pitch precision stamping such as motor rotors and terminals.
- Braking system: Pneumatic disc brake option for controlled overrun and stopping; settings and performance require project verification.
- Maintenance: Simple mechanical structure and low maintenance cost.
Motorized (Active Driven)
- Working principle: Driven by an independent motor with sensor loop control.
- Response speed: Controlled acceleration and deceleration by frequency inverter.
- Best application: Heavy coils, thick materials, or long-pitch feeding setups.
- Braking system: Drive deceleration and braking behavior must be verified for the approved heavy-duty configuration.
- Advantage: Helps protect the material surface and reduces the pulling load on the straightener.
High speed
Motorized Double-Head Decoiler: High-Speed Customized Solutions
To meet the increasing demands of automated production lines for speed, precision, and integration, Henli can upgrade the motorized double-head decoiler with variable-speed control. Building upon the standard speed of 20 m/min, custom speed targets such as 35 or 60 m/min can be evaluated only after the motor, reducer, coil inertia, sensing, buffer and downstream line are confirmed. These are not standard series ratings.
All high-speed solutions integrate a high-precision laser distance sensor or ultrasonic sensor for intelligent material loop control. The system monitors loop height and changes decoiler output in response to buffer demand. This does not by itself prove matched line speed or constant strip tension.
Solution 1
35 m/min High-Speed Smart Variable Speed Solution
Core features: A 35 m/min target may be evaluated for a documented custom line using non-contact loop sensing. Final capability depends on the approved coil, drive, buffer, controls and downstream cycle.
Loop-Demand Speed Response
When the loop becomes smaller, the decoiler accelerates to release more material.
Loop-Demand Deceleration
When the loop becomes larger, the decoiler can slow in response to the loop signal. Strip contact, buffer geometry and surface protection still require line-specific validation.
Loop Condition
Progressive payoff helps maintain a usable buffer loop before the next process; it does not measure or guarantee constant strip tension.
Line Integration
Suitable for automated production lines with changing press speed.
This video demonstrates manual jog functions and auto mode. In auto mode, the laser sensor monitors material loop height and adjusts motor speed to match line speeds up to 45 m/min.
Solution 2
60 m/min Ultra-High-Speed Precision Control Solution
Core features: A 60 m/min target is project-specific and requires documented drive, transmission, inertia, sensor, buffer, electrical and acceptance data. It is not a standard MTD-B rating.
Ultimate Responsiveness
Wider detection range and faster loop response at high speed.
Peak Production
Built for lines with demanding capacity and speed requirements.
Superior Reliability
Optimized for long-term high-speed production loads.
Suitable For
NEV, power battery, motor core lamination, and large automated stamping centers.
35-60 m/min High-Speed Solution (EV Motor Core Line)
Primarily designed for the New Energy Vehicle industry and high-speed motor core lamination. A dedicated line may be engineered around a 60 m/min target only after the complete coil path and downstream equipment are confirmed; the number is not a general series capability.
The optional functions and upgrades for the double-head decoiler are similar to the standard single-head decoiler. For more option details, see the Decoiler Product Page.
Related technical guides
Learn More About Double Head Decoiler Setup
These guides are useful when you need to compare standard dual-head decoiling, heavy-duty motorized layouts, high-speed loop control, or motor-core stamping line integration before requesting a quote.
Customer solution
Project and Workshop References
Project photos help confirm the dual-spindle layout, loading clearance, machine structure, and connection with downstream feeding equipment. Use them as visual references when planning floor space, coil loading method, and material flow direction.
Quote requirements
Information Needed Before Selection
Coil data
Material type, width, thickness, coil weight, coil inner diameter, and coil outer diameter.
Line speed
Standard speed, target high speed, feeding pitch, and whether the downstream machine speed changes frequently.
Downstream machine
S-loop straightener, servo feeder, gear feeder, press model, lamination press, or other connected equipment.
Layout and loading
Available floor space, forklift or crane loading method, coil direction, and automation needs.
FAQ
Frequently Asked Questions (Motorized Double Head Series)
What is the maximum speed of this Motorized Double Head Decoiler?
The standard model operates at 20 m/min. For high-speed applications such as EV motor core lamination, Henli may evaluate custom targets such as 35 or 60 m/min after confirming the coil envelope, inertia, drive, buffer, controls and downstream cycle; these are not standard series ratings.
How does the machine control the material loop at high speeds?
For speeds above 30 m/min, Henli can use laser or ultrasonic sensors instead of traditional touch rods. The non-contact sensing system monitors loop height and adjusts decoiler output in response to buffer demand; it does not measure strip tension or by itself prove synchronization with the press or feeder.
Can I load the next coil while the machine is running?
Yes. The dual-spindle design allows offline loading on the idle spindle while the active spindle feeds the line. When the coil runs out, the turret rotates 180 degrees to switch to the prepared coil.
Is this machine suitable for delicate or thin materials?
The motorized version actively drives the material and can reduce tensile stress on the strip, making it useful for thin silicon steel or delicate laminations that cannot withstand high pulling force.
What safety feature is included for turret rotation?
The turret rotation is secured by a pneumatic positioning locking pin. This mechanically locks the head in the alignment position before feeding starts.
Final CTA
Need a Double Head Decoiler for Your Stamping Line?
Send your material width, thickness, coil weight, coil ID/OD, target speed, and downstream machine type. Henli can help select the MTD-A non-motorized type, MTD-B motorized type, or a customized high-speed double head decoiler.
