Hot Rolled Steel Coil Metal Slitting Machine Color Strips Slitting

TECHNOLOGY FROM SELF PRODUCTION SINCE 1994

Machine basic information

Product Overview

The Hot Rolled Steel Coil Metal Slitting Machine is designed to slit wide steel coils into narrow strips with accurate width, stable edge quality and reliable recoiling performance.

This slitting line is suitable for hot rolled steel, cold rolled steel, galvanized steel strips, color coated steel strips, stainless steel coils and aluminum coils. It is widely used before ERW tube mill production, roll forming production, steel service center processing and metal strip supply.

The standard machine configuration can process coil thickness from 3 mm to 12 mm, coil width from 300 mm to 2100 mm, coil inside diameter of 508 mm, coil outside diameter below 1800 mm, and coil weight up to 35 tons.

For customers producing construction tubes, precision tubes, automobile tubes, fence tubes, heat exchanger tubes, furniture tubes, API pipe or gas transportation pipe, a stable slitting line is the first step to control strip width and final pipe quality.

Problem

Many steel tube and metal processing factories face the same problem: the raw coil is too wide for downstream production.

If the coil is not slit accurately, the following tube mill or roll forming line will suffer from unstable strip feeding, poor forming, edge wave, inaccurate tube size and higher rejection rate.

For color coated strips and galvanized strips, another problem is surface protection. If the slitting process is not stable, the coating surface may be scratched, the edge may have burrs, and the final product quality will be affected.

A buyer does not only need a slitting machine. The buyer needs a complete coil processing solution that can control width accuracy, edge quality, coil tension, recoiling tightness and production efficiency.

Cause

The main cause is that coil slitting is not just cutting. It is a continuous process involving coil loading, decoiling, leveling, guiding, slitting, looping, tension control and recoiling.

For thick coils from 3 mm to 12 mm, the line needs strong mechanical structure, reliable hydraulic system, suitable disc shear design and stable tension control.

If the decoiler, side guide, disc shear and recoiler are not matched correctly, the strip may run off center. This can cause uneven slitting width, poor coil edge and unstable recoiling.

For color coated steel strips, the machine also needs smoother strip handling. Poor guide design or unstable tension may damage the surface coating.

That is why the slitting line should be selected according to coil thickness, coil width, coil weight, raw material type, strip quantity and final application.

Solution

This slitting machine line provides a complete solution from wide coil loading to narrow strip recoiling.

The standard production process includes:

Hydraulic System → Carrying Coil Car → Hydraulic Single Arm Decoiler → Feeding Guide Plate → Pinching Machine → Coil Shearing → Front Looping Table → Side Guiding Device → Disc Shear → Curling Machine → Back Looping Table → Tension Table → Recoiler → Discharging Car → Hydraulic Control → Electric Control

For different customer requirements, the process can also be configured as:

Carrying Coil Car → 3-Step Decoiler → Feeding Guide Plate → Pair Pinching Roller → Five-Roller Leveling → Coil Shearing → Transition Table → Side Guiding → Disc Shear → Curling Machine → Looping Table → Pre-Feeding Coil → Tension Table → Recoiler → Discharging Car → Hydraulic Control → Electric Control

The key value of this solution is process stability. The decoiler controls coil opening, the leveling and guiding system prepares the strip, the disc shear controls cutting quality, and the tension table helps the recoiler form tight and neat slit coils.

For tube mill users, accurate slitting width helps improve forming stability and welding quality. For steel service centers, accurate slitting and neat recoiling help improve delivery quality and reduce customer complaints.

Specifications

Main Technical Data

Slitting Machine Line Model Range

The above models are standard reference models. Final machine design can be customized according to coil width, thickness, material strength, coil weight, strip number, cutting width tolerance and production capacity.

Application

Tube Mill Strip Preparation

The slitting line is widely used before ERW tube mill production. It slits wide steel coils into narrow strips according to the required tube size.

Accurate strip width is important for tube forming, welding seam position and final pipe dimension control.

Color Coated Steel Strip Slitting

For color coated strips, the line can be used to cut wide painted coils into narrow strips for roofing sheet, wall panel, profile forming and decorative metal products.

The machine design should reduce surface scratches and keep stable strip tension during slitting and recoiling.

Galvanized Steel Strip Processing

Galvanized steel strips are often used for construction tubes, greenhouse tubes, fence tubes and light structural products.

A suitable slitting line helps protect the zinc layer and control edge quality.

Steel Service Center Processing

Steel service centers use slitting lines to process hot rolled, cold rolled, galvanized, stainless and aluminum coils for different customers.

The main value is flexible coil processing, accurate strip width and neat recoiled strips ready for delivery.

Automotive and Precision Tube Production

Precision tube production needs more stable strip width and cleaner edges.

The slitting line helps prepare strips for automotive tubes, furniture tubes, heat exchanger tubes and other products requiring higher dimensional stability.

API Pipe and Gas Transportation Pipe Supporting Process

For API pipe and gas transportation pipe production, the slitting process supports the preparation of suitable steel strip before ERW pipe forming.

Stable strip quality can reduce forming deviation and improve the consistency of downstream welding.

How It Works

1. Coil Loading

The carrying coil car transfers the steel coil to the decoiler position.

For heavy coils up to 35 tons, stable coil loading is important for safety and production efficiency.

2. Decoiling

The hydraulic single arm decoiler or 3-step decoiler opens the coil and feeds the strip into the line.

A reliable decoiler helps maintain stable strip tension and prevents sudden coil movement.

3. Pinching and Leveling

The pinching roller pulls the strip forward. The leveling section improves strip flatness before slitting.

Better flatness helps the strip enter the disc shear smoothly and reduces cutting deviation.

4. Coil Shearing

The coil head is cut before continuous feeding.

This step prepares the strip for stable operation and helps reduce irregular feeding at the beginning of production.

5. Side Guiding

The side guiding device keeps the strip centered before slitting.

Accurate guiding is important because even small strip deviation may cause inaccurate slitting width.

6. Disc Shear Slitting

The disc shear cuts the wide coil into several narrow strips.

The blade clearance, blade material, cutting layout and strip thickness must be matched correctly to reduce burrs and improve edge quality.

7. Looping and Tension Control

The looping table stores strip length and balances speed differences between sections.

The tension table controls recoiling tension to keep the slit coils tight and neat.

8. Recoiling and Discharging

The recoiler winds the narrow strips into coils. The discharging car removes the finished slit coils from the line.

Good recoiling quality makes the finished coils easier to transport, store and use in downstream equipment.

How To Choose

Choose by Coil Thickness

If your main coil thickness is 3 mm to 12 mm, the ZJY3.0-12.0 series is a suitable reference model.

If your material is thinner than 3 mm, a high-speed light gauge slitting line may be more suitable. If your material is thicker than 12 mm, a heavy-duty slitting line should be considered.

Choose by Coil Width

The standard machine information supports coil width from 300 mm to 2100 mm.

For steel service centers or customers processing many coil sizes, a wider machine range gives more flexibility.

Choose by Coil Weight

This machine can support coil weight up to 35 tons.

Heavy coil processing requires stronger decoiler structure, coil car, hydraulic system and recoiler design.

Choose by Material Type

Hot rolled steel needs strong mechanical structure and cutting force. Cold rolled steel requires better edge quality. Galvanized and color coated strips require better surface protection.

Stainless steel and aluminum coils may need different blade material and slitting clearance.

Choose by Final Strip Use

For ERW tube mill feeding, strip width accuracy is very important.

For color strip products, surface protection is more important. For steel service centers, model flexibility and fast adjustment are usually the key points.

Choose by Slitting Speed

The speed should not be selected only by the highest number.

For thick coil slitting such as 3 mm to 12 mm, stable cutting quality, safe operation and recoiling tightness are more important than extremely high speed.

Choose by Supplier Experience

Slitting production requires both qualified equipment and experienced technology.

Zhongyue Metallurgy Equipment Technology has developed metal processing and tube mill related equipment for many years. Our experience comes from machine manufacturing and practical production understanding, helping customers select a line that matches real factory operation.

FAQ

1. What materials can this slitting machine process?

This machine can process hot rolled steel, cold rolled steel and galvanized steel strips.

It can also be configured for color coated steel strips, stainless steel coils and aluminum coils according to customer requirements.

2. What is the suitable thickness range for this machine?

The basic machine information supports coil thickness from 3 mm to 12 mm.

For other thickness ranges, models such as 0.2–2 mm, 0.5–3 mm, 1–6 mm, 2–10 mm or 4–16 mm can be selected according to the actual material.

3. Can this line be used before an ERW tube mill?

Yes. This slitting line is widely used before ERW tube mill production.

It slits wide steel coils into narrow strips required by tube forming, helping improve forming stability, welding position and final pipe size control.

4. How to reduce burrs during slitting?

Burr control depends on blade clearance, blade quality, material thickness, strip strength, cutting speed and machine alignment.

Before production, the slitting knife arrangement should be set according to the material and target strip width.

5. Can the machine slit color coated steel strips?

Yes, the line can be configured for color coated steel strips.

For this application, the machine should pay more attention to surface protection, smooth guiding, stable tension and proper recoiling to reduce coating scratches.

6. What information is needed before quotation?

The buyer should provide coil material, coil thickness, coil width, coil inside diameter, coil outside diameter, coil weight, final strip width, number of strips, required speed and final application.

If the line is used for color coated strips, galvanized strips or stainless steel, the surface quality requirement should also be confirmed.