High-Precision Unwinding & Rewinding: The Foundation of Seamless Conversion
High-Performance Web Handling: Engineered for heavy-duty stability during demanding industrial unwinding and rewinding operations.
Advanced Tension & Alignment Control: Delivers perfect tension management and flawless web alignment across all material gauges and thicknesses.
Zero Material Distortion: Guarantees high-speed processing precision while preventing material stretching or deformation to preserve substrate integrity.
Flexible Configuration Options: Available as standalone units or seamlessly integrated modules tailored to fit your specific conversion line layout.
UR Series - Unwinder-Rewinders from Spark Machinery
Spark Machinery delivers advanced unwinding and rewinding solutions engineered for uncompromising precision across films, paper, and textiles. Our systems integrate intelligent tension and edge control technologies to ensure consistent quality and performance at every stage of production. With fully customizable configurations tailored to the needs of packaging, automotive, insulation, and medical sectors, we provide robust, application-ready equipment that elevates process efficiency and reliability.
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How do unwinder rewinder machines work?
Unwinders and Rewinders by Spark Machinery
At Spark Machinery, our unwinders and rewinders are engineered to work seamlessly with our perforation systems, ensuring precise, reliable material handling from start to finish. Our unwinders feed the rolls into downstream processes with consistent tension and alignment, supporting smooth, defect-free perforation. After processing, our rewinders take the material and produce clean, uniform rolls tailored to your production needs.
The Role of TNT Control
Effective tension, nip, and torque (TNT) control is critical to high-quality unwinding and rewinding. Proper tension prevents stretching or wrinkling, nip control ensures smooth material flow without slippage, and accurate torque delivers consistent, tightly wound rolls. Together, these controls guarantee efficient operation and superior roll quality, making Spark Machinery solutions ideal for films, paper, and textiles in demanding production environments.
Main features of our unwinder rewinder machines
Versatility & materials
Spark Machinery’s unwinders and rewinders deliver unmatched flexibility for modern production lines. They handle a wide spectrum of materials, from plastics and films like LDPE, LLDPE, HDPE, PP, PVC, BOPP, CPP and PET, stretch, cling films, paper, aluminium foil, laminates, non-wovens, and specialty textiles. Even challenging substrates like foam, Tyvek, and raffia are managed with precision. Designed to integrate seamlessly with our perforation systems, these machines ensure consistent tension, alignment, and roll quality across packaging, medical, industrial, and specialty applications—so you can process any material with confidence and efficiency.
Multi-Rolls Capability for Macro Perforation
In macro perforation processes, the system can be configured to unwind and rewind up to four rolls simultaneously, ensuring high productivity while maintaining precise tension control and alignment across all webs.
Tension and Edge Control
Spark Machinery's Winder-Rewinder is engineered for maximum precision, ensuring flawless material handling through advanced tension and edge control systems adaptable to a wide range of materials and processes.
Precision Tension Management
The system integrates flexible mechanical and electronic solutions to guarantee stable and accurate web control throughout the entire process:
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At the unwinder level, web tension can be managed either by a braking system or by an actively controlled motor, depending on the application requirements and material characteristics.
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Tension is continuously monitored and regulated using either load cell rollers or a controlled dancer system.
Load Cell Rollers measure real-time web tension by mounting the roller on precision load cells.
Dancer System features controlled weight and adjustable position, ensuring smooth tension compensation for sensitive or elastic materials.
The selected solution is determined according to the type, thickness, and behavior of the processed material.
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When motor-driven, the unwinder motor manages both startup and dynamic braking, actively contributing to maintaining constant and stable web tension during acceleration, deceleration, and steady-state operation.
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Where the process demands additional traction or precise speed definition, a traction calender is included. This assembly consists of a motorized, chromed pulling roller operating in conjunction with an idle rubber roller with adjustable manual pressure, ensuring controlled web transport and accurate line speed regulation.
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The final rewinding can be configured as either center-driven or peripheral-driven, depending on material properties and winding requirements, ensuring optimal roll quality and tension consistency.
Flawless Edge Alignment
Material alignment is guaranteed by an automatic centering system designed to adapt to different material types and process configurations:
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Depending on the material characteristics, edge detection is performed using either photocell or infrared sensors. These sensors continuously monitor the material edge to ensure accurate alignment.
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The edge guiding sensors can be installed at various points along the line, such as directly at the unwinder exit or downstream after the material processing stage, according to process requirements and layout constraints.
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Sensor feedback is transmitted to the centering device on which the expansion shaft is mounted, enabling continuous and precise re-centering of the coil throughout operation.
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Operators can easily fine-tune the centering behavior via a compact control panel positioned at the beginning of the line for quick and intuitive access.
Integrated Safety Systems
The winder-rewinder machine features a robust array of integrated safety systems designed for operator protection and process integrity.
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The system includes multiple latching Emergency Stop Switches positioned on both the unwinder (rear) and rewinder (front), specifically intended for use during hot perforation operations to immediately stop production in the event of material defects or irregularities such as tears, burn marks, or other processing faults. All belt-driven transmission components are protected by Fixed Covers to prevent entanglement. The film's processing path is routed internally and beneath the operator platform, ensuring safe access.
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The unwinder utilizes Safety Door Interlocks on the roller extraction panels that prevent machine startup if they are open. Rear access panels are secured with screws.
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Specific safeguards are implemented at the rewinder:
A Protective Guard is placed over the blade block to prevent cutting hazards.
Side covers protect against crushing injuries during the descent of the bobbin compaction press roller.
An Anti-Drag Sheet is positioned on the upper roller to limit pinch points.
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The electrical control cabinet is secured with Dual Key Locks and a Lockable Power Selector (LOTO) to prevent unexpected power supply during maintenance. Software access requires a Password for sensitive and advanced parameter input. A Timed Auto-Logoff automatically reverts the touch screen to the simple operator mode for unauthorized user protection.
Areas of Application
Serving Multiple Industries
Spark Machinery’s unwinders and rewinders are designed to meet the diverse needs of multiple sectors, delivering precision, efficiency, and high-quality rolls for every application:
Food Packaging – Handle films, foils, and laminates for pouches, wrappers, and barrier packaging.
Automotive Components – Process technical textiles, films, and laminates used in interiors, insulation, and protective layers.
Insulation Materials – Manage foils, papers, and flexible composites for thermal and acoustic insulation.
Flexible Packaging – Support a variety of films, laminates, and non-wovens for bags, sachets, and shrink-wrap.
Textiles – Convert technical fabrics and non-wovens for industrial and consumer textile applications.
Medical Products – Handle delicate non-wovens, films, and laminates for hygiene, medical, and healthcare products.
These systems ensure consistent tension, alignment, and roll quality, making them adaptable across industries where precision and reliability are essential.
Frequently Asked Questions about our unwinder rewinder machines
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A winder creates large master rolls of material, such as films, paper, or textiles. An unwinder feeds these master rolls into downstream equipment, ensuring smooth and consistent material flow. A rewinder takes processed material and rewinds it into smaller, uniform rolls ready for packaging or further use.
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Spark Machinery’s machines are highly versatile and can handle a wide range of materials, including:
Plastics and films: LDPE, HDPE, PP, PVC, BOPP, CPP, PET
Paper and aluminium foil
Non-wovens and specialty textiles
Flexible laminates, foam, Tyvek, raffia, and other flexible substrates
This flexibility allows our systems to serve industries such as packaging, medical, automotive, insulation, and textiles, ensuring consistent tension, alignment, and roll quality across all materials.
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Tension control ensures that the material moves smoothly through the machine without stretching, wrinkling, or misalignment. Spark Machinery systems use a combination of mechanical and electronic tension control to maintain consistent web tension throughout unwinding and rewinding. Optional automatic tension control systems adjust the tension in real time, while nip rollers and edge guiding keep the material aligned. Together, these features ensure uniform, high-quality rolls and reliable downstream processing.
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Yes. Spark Machinery’s systems are designed for seamless integration with your production line. In many cases, we provide perforators, embossers, or other converting machines that come already equipped with unwinders and rewinders, ensuring smooth, coordinated operation. Our machines can also be customized to match your line speed, material width, and process requirements, maintaining precise tension, alignment, and roll quality without disrupting your workflow.
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Yes. Spark Machinery provides full installation and commissioning services for all unwinders, rewinders, and converting systems. We also offer operator training and technical support to ensure your team can run the equipment safely and efficiently, optimize performance, and maintain consistent material quality. Our goal is to make integration into your production line seamless and hassle-free.
Why choose Spark Machinery?
Uncompromising Quality, Reliability & Performance
Spark Machinery designs and builds high-performance systems known for their precision, durability, and consistent output. Our machines operate reliably even under high-speed, high-demand production conditions, delivering top-tier results with minimal downtime.Tailor-Made Solutions for Every Customer
We don’t believe in one-size-fits-all. Every system is engineered based on the specific needs of our customers—whether it’s material type, production speed, perforation pattern, or integration with existing lines. This ensures optimal efficiency and seamless operation from day one.End-to-End Support
Our commitment goes beyond machine delivery. We offer expert guidance during project planning, hands-on support during installation and training, and responsive service throughout the machine’s operational life. We're your partner before, during, and after purchase.Driven by Research & Innovation
At Spark Machinery, continuous improvement is part of our DNA. We invest heavily in R&D and testing to develop cutting-edge perforation technologies, improve system capabilities, and stay ahead of evolving market demands. Innovation is what keeps our customers competitive—and we deliver it with every machine.
Get expert advice for your Converting Needs
Spark Machinery’s unwinders and rewinders deliver smooth, accurate material handling for films, paper, foil, non-wovens, and specialty substrates. Designed to integrate with perforators, embossers, or other converting systems, our machines ensure consistent tension, alignment, and roll quality—boosting efficiency and reliability across your production line. Contact us today to explore the right solution for your process.
PERSONAL CONTACT
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Discover how tailored airflow, moisture control, and material efficiency can elevate your logistics and product protection.
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FEDERICA CANTAGALLI
Commercial Export Office
