Model Ø150×400/Ø380×400 Four-High Uni-Directional Cold Rolling Mill
Designed for precision cold rolling of annealed, unpickled black strips with:
Ideal for efficient secondary rolling, this robust four-high mill ensures consistent thickness control and superior surface quality. Perfect for narrow-strip applications requiring reliable performance.
- Key Features & Technical Highlights
1. High-Efficiency Rolling Performance
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Model: Ø150×400/Ø380×400 Four-High Uni-Directional Cold Rolling Mill
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Material Compatibility: Processes annealed, unpickled black strips (≤300mm width, ≤3.0mm thickness) in 2 passes with ≤50% total reduction.
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Output: Achieves 0.9–1.5mm thickness from 1.8–3.0mm feedstock (yield strength ≤260 MPa).
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Speed: Max rolling speed 180 m/min; max coiling speed 200 m/min.
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2. Robust Core Components
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Work Rolls: 9Cr2Mo alloy, HS90–92 hardness (Ø140–150mm × 400mm).
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Backup Rolls: 9Cr2Mo alloy, HS70–75 hardness (Ø350–380mm × 400mm).
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Rolling Force: Max 4,500 kN (design capacity).
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Tension Control: Coiling tension up to 30 kN (hydraulic expansion Ø490–508mm).
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3. Automated Production Line
4. Power & Control Systems
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Main Motors: 2× 280 kW DC motors (750–1,600 rpm) + 1× 144 kW coiler motor.
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Drive System: Siemens 6RA70 digital DC drives for precision speed/tension control.
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Hydraulic/Lubrication:
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Hydraulic station (10 MPa, 60 L/min, NAS9 cleanliness).
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Oil lubrication (0.63 MPa, VG220 oil).
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5. Turnkey Supply & Support
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Delivery: 120 days post-order.
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Scope: Includes mechanical, hydraulic, and electrical systems (excludes pickling line, some sensors, and installation materials).
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After-Sales: 1-year warranty, on-site commissioning support, and fault response within 7–10 days.
| Model No. | 400mm 4-Hi 2-Tandem CRM |
| Material | Annealed non-pickling black strips |
| Material thickness (mm) | 1.8-3.0 |
| Material width (mm) | 200-300 |
| Output thickness (mm) | 0.9-1.5 |
| Rolling pressure (KN) | 4500 |
| Backup roller size (mm) | Φ350×400 |
| Work roller (mm) | Φ140×400 |
| Mill stand | 2 stands |
| Drive mode | By work roller |
| Main motor | DC motor |
| Reducer | Combined gearbox |
| Decoiler (option) | Φ610×650 |
| Recoiler (option) | Φ508×750 |
| Rolling speed (m/min.) | Max. 180 |
| Accumulator | Disc type |
| Recoiler tension (KN) | 30 |
| Screw-down mode | Mechanical or Hydraulic AGC (as required) |
| DC speed regulation | Simens |
| Electrical control | Simens |
Note: The above specifications are for reference only. Customized cold rolling mill as per customer's requirements and demands would be available.
The 400mm 4-High 2-Tandem Continuous Cold Rolling Mill is suitable for processing a wide range of materials, including steel, aluminum, copper and copper alloys, nickel and nickel alloys, titanium, and other non-ferrous metals. These materials are used in various industries such as automotive, aerospace, construction, electronics, and manufacturing.
Packaging:
All parts of the 400mm Four-High Two-Tandem Cold Rolling Mill are fixed inside container by steel wires and special PET straps, in order to make sure all parts will not move during transportation and avoid any kinds of damage of machine and container.
Shipping:
Sea Freight: The 400mm 4-High 2-Tandem Continuous Cold Rolling Mill is often shipped via ocean freight, especially for international transportation. The equipment is securely loaded into shipping containers or flat racks, which are then loaded onto cargo vessels. This mode is suitable for long-distance shipping and can accommodate larger and heavier continuous rolling mill.
Air Freight: When there is a need for fast delivery or for shipping smaller or lighter cold rolling mill, air freight can be used. The equipment is packed and loaded onto aircraft for transportation. Air freight is typically more expensive than ocean freight but offers quicker transit times.
Q1. What is a continuous rolling mill?
A continuous rolling mill is a type of metal rolling mill that is designed for high-volume production and continuous processing of metal strips or coils.
Q2. What materials can be processed on a continuous rolling mill?
Continuous rolling mills can process a wide range of materials, including steel, aluminum, copper, nickel, titanium, and other non-ferrous metals.
Q3. How does a continuous rolling mill work?
Continuous rolling mills consist of multiple stands arranged in a tandem configuration. Metal strips or coils are fed into the first stand, and as they pass through each stand, the rolls progressively reduce the thickness and increase the length of the metal.
Q4. What control systems are used in continuous rolling mills?
Continuous rolling mills are equipped with advanced automation and control systems that monitor and adjust parameters such as roll gap, rolling speed, temperature, and tension, ensuring precise rolling specifications and maintaining product quality.
Q5. Can continuous rolling mills produce different sizes and shapes?
Yes, continuous rolling mills can be adjusted to produce different thicknesses, widths, and shapes of metal strips or coils by changing the rolling parameters and adjusting the mill configuration.
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400 MM Four Roll Two Tandem Unidirectional Cold Rolling Mill For 3mm Thickness Carbon Steel Strips Images
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