Raw Material Rolls & Paper Rolls

In the paper, packaging, printing, film, or textile industries, lifting and handling material rolls directly affects productivity, product quality, and occupational safety. However, traditional lifting methods such as forklifts, hoists, or manual labor often struggle to meet the accuracy requirements when lifting, rotating, and positioning material rolls.

Vietmani's lift assist arm solution applies Zero Gravity technology, helping operators handle material rolls gently, accurately, and safely, while reducing material damage, shortening roll change times, and optimizing production efficiency. In this article, let's explore the challenges in handling material rolls and the solution that Vietmani provides.

Why is handling material rolls a challenge?

In many industries, material rolls not only have a large mass but also require high precision throughout the lifting and installation process. Depending on the material such as paper, film, fabric, aluminum, or steel, each roll can weigh from a few tens to thousands of kilograms. However, what makes handling complex is not the load capacity, but the ability to control movement and protect the material during every operation.

Roll shape causes difficulties during lifting

Unlike pallets or cartons with flat surfaces and stable centers of gravity, material rolls are cylindrical, making them prone to rolling, rotating, or losing balance when lifted. If the clamping point or lifting angle is inaccurate, the roll can become eccentric, slip out of position, or collide with surrounding equipment.

In addition, many types of rolls such as paper, film, or fabric have easily scratched surfaces and paper cores that can easily deform if subjected to improper clamping force.

The roll change process requires many precise operations

In actual production, operators not only lift the roll but also have to simultaneously perform multiple operations such as:

• Moving the roll to the production machine's location.
• Rotating or flipping the roll in the correct feeding direction.
• Aligning the roll center with the machine shaft.
• Positioning accurately before installation.

If any of these operations lack accuracy, businesses may face core distortion, eccentricity, vibration during operation, or have to stop the machine for adjustments.

Traditional lifting methods still have many limitations

Many factories still use forklifts, hoists, or manual labor to handle material rolls. These methods can meet load lifting requirements but face many difficulties when needing to rotate, flip, or position the roll with high precision.

In addition to increasing the risk of material damage, relying on manual operations makes the roll change process time-consuming, affecting productivity and posing potential safety risks for operators.

Therefore, businesses today are gradually switching to specialized lift assist arms to control the entire process of lifting, rotating, flipping, and positioning material rolls more safely, accurately, and efficiently.

Risks when using traditional lifting methods

In many factories, material rolls are still handled using forklifts, hoists, overhead cranes, or manual operations. Although they can meet lifting needs, these methods are not designed to handle operations requiring high precision such as rotating, flipping, and positioning material rolls. This leads to many risks during operation.

Easy to damage material rolls

When using forklift forks, wire ropes, or crane hooks, the impact force is often not evenly distributed on the material roll. If the operation is not technically correct, the roll may encounter conditions such as:

• Distortion or deformation of paper and plastic cores.
• Scratches and dents on the roll surface.
• Peeling edges or shifting of material layers.
• Reduced material quality before being put into production.

For paper, film, or high-value materials, even minor damage can increase the scrap rate and incur significant costs.

Difficulty in precise positioning onto production machines

Placing the material roll into the correct position on the machine shaft requires high precision. However, forklifts or hoists are often difficult to control millimeter by millimeter, especially in tight spaces.

When the roll is eccentric or installed incorrectly, businesses may have to stop the machine to readjust, increasing roll change time and affecting production schedules.

Potential occupational safety risks

Material rolls have a large mass and high inertia. When lifted by traditional equipment, the roll easily vibrates or rotates unintentionally during movement.

To maintain balance or adjust the roll direction, operators often have to use direct physical force, increasing the risk of:

• Hand pinching or impact when the roll rotates.
• Musculoskeletal injuries due to frequent lifting and supporting.
• Occupational accidents occurring if the roll slips or falls from the lifting position.

Decreased productivity and increased operating costs

Traditional lifting methods often require multiple personnel coordinating to hold, rotate, and align the material roll. Prolonged roll change time not only reduces equipment efficiency but also increases downtime, directly affecting the productivity of the entire line.

Besides, incurred costs due to damaged materials, machine waiting time, and occupational safety risks also increase the total operating costs of the business.

The above limitations show that traditional lifting equipment only meets the load lifting requirement, while modern production demands the ability to precisely control the entire process of lifting, rotating, flipping, and positioning material rolls. This is also the reason why more and more businesses are choosing lift assist arms as an optimal solution for modern production lines.

What is the Vietmani lift assist arm?

The Vietmani lift assist arm is an industrial lifting solution applying Zero Gravity technology, helping operators lift, rotate, flip, and position material rolls gently, accurately, and safely. The pneumatic load balancing system significantly reduces physical labor and improves material roll handling efficiency.

Designed according to specific practical applications, the Vietmani lift assist arm can integrate various specialized end effectors to handle paper, film, fabric, aluminum, steel rolls, and many other industrial rolls. The solution helps protect materials, shorten roll change times, and optimize productivity for production lines.

How does Zero Gravity technology work?

Zero Gravity technology (Load balancing) is the core foundation that makes the difference for the Vietmani lift assist arm. Instead of letting operators use physical strength to lift the entire load, the system uses compressed air to create a force that balances the weight of the material roll.

When the operator grips the material roll, the system will automatically adjust the pneumatic pressure to balance the load. As a result, the material roll is maintained in an almost "weightless" state, making lifting gentle and stable.

Operators do not need to use much force to lift or hold the load; they only need to exert a small force to control the movement direction. Operations such as lifting, lowering, rotating, flipping, and positioning material rolls are performed smoothly, accurately, and are easier to control compared to traditional lifting methods.

In addition to reducing physical labor, Zero Gravity technology also helps minimize vibration and impact during movement. This contributes to protecting the material roll's surface, reducing the risk of core distortion and scratches, and improving accuracy during installation onto production machines.

Thanks to its effective motion control capabilities, Zero Gravity technology not only improves work productivity but also enhances safety levels, reduces pressure on operators, and optimizes the operational efficiency of the entire production line.

Types of material roll handling end effectors

The End Effector is the component that comes into direct contact with the material roll, determining the capability for safe lifting and precision during operation. Depending on the size, load, and characteristics of each type of roll, Vietmani designs suitable end effectors to ensure handling efficiency and material protection.

Expanding Mandrel

The expanding mandrel works by gripping from inside the roll core, suitable for paper, film, or materials with standard cores. This solution securely holds the roll without impacting the outer surface, minimizing scratches and deformation during lifting.

O.D (Outside Diameter) Gripper

The O.D gripper uses specialized clamping pads to hold the roll from the outside. The gripping surface is designed to match each type of material to distribute the force evenly, reducing the risk of dents or damage to the material roll.

Custom end effectors for specific applications

For rolls with special sizes, shapes, or handling requirements, Vietmani designs end effectors according to the actual needs of each production line. The system can integrate functions such as 360° rotation, 90° flip, safety locks, or precise positioning, meeting diverse applications in the paper, packaging, printing, film, textile, and metal industries.

Choosing the right type of end effector not only helps lift material rolls safely but also protects material quality, shortens roll change times, and improves the operational efficiency of the entire production line.

Applications in various industries

Thanks to the ability to precisely lift, rotate, flip, and position material rolls, Vietmani lift assist arms are widely applied in many manufacturing industries, helping to optimize productivity, reduce physical labor, and protect material quality.

• Paper industry: Lifting, rotating, and changing paper rolls on paper machines, cutters, printers, and slitter rewinders, helping to reduce paper edge damage and shorten roll change times.
• Packaging and printing industry: Handling corrugated carton rolls, kraft paper, and printing material rolls with high precision, minimizing machine downtime and enhancing productivity.
• Film and plastic industry: Lifting PE, PP, PET, PVC, and film rolls, protecting the material surface, and avoiding scratches or deformation during transport.
• Textile industry: Supporting the handling of fabric rolls, non-woven fabrics, and technical textiles, reducing labor and optimizing the feeding process.
• Metal industry: Lifting steel rolls, aluminum rolls, stainless steel rolls, and other coiled materials with high safety and stability.
• Other manufacturing industries: End effectors and arm configurations can be customized to meet various material roll handling applications according to the requirements of each production line.

Conclusion

In modern manufacturing industries, handling material rolls is not just a lifting step but also directly affects productivity, product quality, and occupational safety. Using traditional lifting methods can increase the risk of material damage, prolong roll change times, and incur numerous operating costs.

With Zero Gravity technology, specialized end effector systems, and the ability to design for specific practical applications, the Vietmani lift assist arm helps businesses lift, rotate, flip, and position material rolls gently, accurately, and safely. This solution not only protects materials and reduces downtime but also contributes to optimizing production processes and enhancing long-term investment efficiency.

If your business is looking for a suitable material roll lifting solution, please contact Vietmani to have our team of engineers conduct a practical site survey, provide consultation, and design an optimal system for each production line.

Contact us now for a free Site Survey & Solution Consultation: 0931 782 489