Automatic C/Z Purlin Roll Forming Machine 3.0mm CZ Interchangeable Line 15–18 m/min (up to 30 m/min without punching)

The SX20 Automatic C/Z Purlin Roll Forming Machine is designed for manufacturers who need a flexible solution for producing different sizes of C and Z steel purlins from a single production line. Compared with conventional purlin machines, the SX20 combines automatic size adjustment, pre-punching, pre-cutting, and interchangeable C/Z forming to improve production efficiency and reduce unnecessary material consumption.

C and Z purlins are widely used in modern steel construction because they provide a strong and lightweight structural solution. They can be used for roof and wall framing, steel building structures, solar mounting systems, warehouses, workshops, and other applications requiring reliable cold-formed steel sections.

Flexible C and Z Purlin Production

A major advantage of the SX20 C/Z purlin machine is its ability to manufacture different C and Z profiles without replacing the complete set of forming rollers.

The adjustable profile range includes:

Profile	Width	Height	Lip
C Purlin	80–300 mm	30–80 mm	10–20 mm
Z Purlin	120–300 mm	30–80 mm	10–20 mm

The forming system can also produce 90° and 135° configurations, allowing manufacturers to adapt the finished profile to different structural requirements.

This interchangeable design is particularly useful for steel fabrication companies producing multiple purlin specifications. Instead of installing separate machines for every profile size, operators can adjust the required dimensions through the control system.

Pre-Punching and Pre-Cutting for Efficient Production

The SX20 uses a production sequence of:

Decoiling → Leveling → Pre-Punching → Pre-Cutting → Roll Forming → Post-Cutting → Product Support

The pre-punching system creates holes before the steel strip enters the roll forming section. This arrangement helps maintain accurate hole positions while allowing the forming process to remain continuous and stable.

The integrated pre-cutting system also provides greater flexibility when producing different lengths and batches. It can help reduce unnecessary material consumption compared with conventional production arrangements.

For manufacturers handling multiple orders, the PLC system can store production parameters and control different profile lengths automatically. This makes it easier to switch between production batches while reducing manual adjustment.

Automatic C/Z Profile Size Adjustment

The SX20 is equipped with an intelligent PLC control system that manages the main production operations.

Operators can enter production parameters through the control panel, including:

• Purlin profile dimensions

• Hole positions

• Hole spacing

• Cutting length

• Production quantity

• Different production batches

Once the parameters are set, the machine coordinates the punching, forming, and cutting processes automatically.

The automatic size adjustment system also allows C and Z purlin specifications to be changed more conveniently. This is especially valuable for manufacturers producing customized steel structures where profile dimensions may vary from order to order.

Strong Roll Forming Structure for 1.0–3.0 mm Steel

The SX20 is designed to process 1.0–3.0 mm steel, including cold rolled steel, galvanized steel, and hot rolled steel.

Compatible materials include:

• Q195

• Q235B

• ST52

• Galvanized steel

• Cold rolled steel

• Hot rolled steel

The forming section uses approximately 18–20 roller stations, depending on the machine configuration. The forming rollers can be manufactured from Cr12 material, providing good wear resistance for long-term production.

The machine can achieve a standard forming speed of approximately 15–18 m/min with punching, while the speed can reach up to 30 m/min without punching, depending on the production configuration and profile specification.

Servo Drive and PLC Control

A 22 kW servo motor provides the main forming power, supporting stable material feeding and accurate profile production. The servo-driven system works together with the PLC control system to improve length accuracy and production consistency.

The hydraulic system is equipped with an 11 kW hydraulic station, which supplies power for the punching and cutting operations.

The standard machine configuration includes:

• 22 kW servo motor

• 11 kW hydraulic station

• PLC control system

• Chain and gear transmission

• 75 mm / 90 mm shaft

• Cr12 forming rollers

• Hydraulic punching and cutting system

The control system can also automatically count finished pieces, making production management easier for operators.

SX20 C/Z Purlin Machine Technical Specifications

Item	Specification
Machine Model	SX20
Product Type	C/Z Steel Purlin
Material	Cold Rolled Steel, Galvanized Steel, Hot Rolled Steel
Material Thickness	1.0–3.0 mm
Material Grade	Q195, Q235B, ST52
C Purlin Width	80–300 mm
C Purlin Height	30–80 mm
C Purlin Lip	10–20 mm
Z Purlin Width	120–300 mm
Z Purlin Height	30–80 mm
Z Purlin Lip	10–20 mm
Forming Speed	15–18 m/min with punching
Maximum Speed	Up to 30 m/min without punching
Roller Stations	18–20
Shaft Diameter	75 / 90 mm
Main Motor	22 kW Servo Motor
Hydraulic Power	11 kW
Transmission	Chain & Gear
Voltage	380V / 50Hz / 3 Phase
Standard Decoiler	5T
Optional Decoiler	10T Hydraulic Decoiler

Actual specifications may be adjusted according to the required profile, material, punching pattern, and production speed.

Applications of C and Z Steel Purlins

C and Z purlins manufactured by this machine are commonly used as secondary structural members in steel construction.

Typical applications include:

Steel Structure Buildings:
C/Z purlins are frequently used for roof and wall framing in workshops, warehouses, factories, and agricultural buildings.

Solar Mounting Structures:
Smaller C or Z sections can be manufactured for photovoltaic support structures and related steel frameworks.

Prefabricated Buildings:
The lightweight characteristics of cold-formed purlins make them suitable for modular and prefabricated construction.

Roofing Systems:
Purlins provide support for roof panels and help transfer structural loads to the main steel frame.

Infrastructure and Storage:
C/Z sections can also be used in storage systems, structural frameworks, and selected infrastructure applications

Why Choose an Interchangeable C/Z Purlin Machine?

For manufacturers producing several purlin specifications, an interchangeable machine can simplify the production process.

The SX20 C/Z interchangeable roll forming machine combines several functions in one line:

• One machine for both C and Z profiles

• Adjustable profile dimensions

• Pre-punching before roll forming

• Pre-cutting for flexible production

• Automatic PLC control

• Servo-driven forming

• 1.0–3.0 mm material thickness capability

• Production speeds up to 30 m/min without punching

• 5T standard decoiler with 10T hydraulic option

• Automatic production counting and parameter storage

This configuration makes the SX20 suitable for manufacturers that need to balance profile flexibility, production efficiency, and equipment investment.

Reliable Solution for Customized Purlin Production

The SX20 Automatic C/Z Purlin Roll Forming Machine provides an integrated solution for producing structural steel purlins in multiple sizes and configurations. Its combination of pre-punching, pre-cutting, servo drive, PLC automation, and adjustable C/Z forming allows manufacturers to handle a wider variety of orders with one production line.

For steel structure manufacturers, roofing component suppliers, and solar structure producers, the machine can be configured according to the required purlin dimensions, steel thickness, punching pattern, cutting length, and production capacity.

With the right configuration, the SX20 provides a practical production solution for businesses looking to manufacture high-quality C and Z purlins with flexible sizing and automated processing.