Product Overview
Duplex Precision Slitting Equipment converts wide parent rolls into multiple finished rolls through controlled unwinding, web guiding, longitudinal slitting and duplex rewinding. Two rewind positions allow several slit rolls to be produced from one parent roll within a continuous converting process.
The machine configuration is selected according to material thickness, parent-roll width and diameter, finished-roll width and diameter, core size, slit layout and required operating speed.
Duplex Rewinding Configuration
Two Rewind Positions
The duplex arrangement provides two winding positions for multiple finished rolls. Roll layout is set according to finished width, core size and required roll diameter.
Differential Winding
Individual rolls can require different winding conditions as their diameters increase. Differential winding control helps accommodate these changes across multiple rewind positions.
Precision Slitting System
Slit Width
Knife positioning determines the finished web width and slit layout. Configurations can support slit widths from 20 mm upward, depending on material and machine setup.
Knife Selection
Razor and shear slitting methods can be selected according to substrate structure. The cutting method, knife condition and positioning affect edge quality and dimensional consistency.
Web Tension and Guiding
Tension Control
Unwind and rewind tension is adjusted according to material thickness, elasticity and winding diameter. Stable tension helps maintain web tracking and finished-roll formation.
Web Guiding
The web-guiding system maintains lateral position before and after slitting. Accurate tracking is important when several narrow rolls are produced from the same parent web.
Material Compatibility
Plastic Films
The machine can process common flexible films within the specified thickness and winding range. Material stiffness, surface condition and elongation determine the required process settings.
Paper and Labelstock
Paper and labelstock require suitable knife geometry and tension settings to maintain slit edges and roll alignment.
Laminates and Foil
Laminated structures, metallized films and foil-based webs require controlled tension and appropriate slitting conditions. Final configuration depends on material construction and gauge.
Key Equipment Features
Duplex Winding
Two rewind stations provide a practical configuration for producing multiple finished rolls from one parent roll.
Adjustable Slitting
Knife positioning can be arranged for different finished-width combinations within the available working width.
Tension Regulation
Controlled unwind and rewind tension supports consistent web transport as the roll diameter changes during production.
Roll Formation
Core dimensions, winding pressure, tension and lay-on conditions are coordinated to achieve the specified roll diameter, edge position and winding density.
Technical Parameters
|
Parameter |
Typical Specification |
|
Machine Type |
Duplex Slitter Rewinder |
|
Working Width |
1,050–1,850 mm |
|
Material Thickness |
12–300 μm |
|
Parent Roll Diameter |
1,000–1,200 mm |
|
Finished Roll Diameter |
600–800 mm |
|
Minimum Slit Width |
20 mm |
|
Unwind Core ID |
76 / 152 mm |
|
Rewind Core ID |
70 / 76 / 152 mm |
|
Maximum Machine Speed |
Up to 800 m/min |
|
Rewind Stations |
2 |
|
Slitting Methods |
Razor / Shear |
|
Control System |
PLC-based |
|
Material Form |
Roll-to-roll |
Application Areas
Flexible Packaging Materials
Suitable for converting film and laminated webs into narrower rolls for subsequent packaging operations.
Label and Release Materials
The duplex configuration supports narrow-width production where slit position, edge alignment and finished-roll dimensions must remain consistent.
Industrial Roll Materials
Paper, metallized film, foil-based webs and other technical materials can be processed when their mechanical and winding characteristics match the selected configuration.
Selection Criteria
Confirm substrate type, thickness, width, structure and surface characteristics. These values determine the applicable slitting method and tension range.
Parent-roll diameter, finished-roll diameter, core dimensions and finished widths establish the unwind and rewind configuration.
The number of finished rolls, individual slit widths and edge trim determine knife quantity, spacing and usable machine width.
Target running speed should be considered together with material gauge, roll weight, winding quality and required production stability.
Quality and Production Considerations
Slit Edge
Edge condition is influenced by knife type, knife alignment, material structure and operating settings. The selected cutting method should match the substrate.
Roll Alignment
Web position and rewind alignment directly affect finished-roll edges. Stable guiding and controlled winding pressure help maintain consistent roll geometry.
Roll Hardness
Finished-roll hardness is affected by tension, core condition, contact pressure and material properties. The required winding profile should be defined according to the downstream process.
FAQ
Q: What materials can this machine process?
A: The machine can be configured for plastic films, paper, labelstock, laminates, metallized films and foil-based materials within the applicable thickness and winding range.
Q: What determines the working width?
A: Parent-roll width, finished-roll widths, slit quantity and edge trim determine the required working width.
Q: What is the minimum slit width?
A: A typical configuration supports slit widths from 20 mm upward. The practical range depends on material, knife system and finished-roll requirements.
Q: What information is needed for machine selection?
A: Material type and thickness, parent-roll width and diameter, finished-roll widths and diameters, core size, slit layout and target speed are required for technical configuration.
Q: Why use duplex rewinding?
A: Two rewind positions allow multiple finished rolls to be produced from one parent roll and provide a suitable configuration for continuous roll converting.
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