Industrial Manipulators for Loading Film Rolls in Confectionery Manufacturing

The confectionery manufacturing industry currently faces a dual pressure: continuously increasing productivity to meet market demands while adhering to increasingly strict occupational safety standards. Within the production line, the packaging stage typically operates at the highest speed, with modern machinery capable of processing from 200 to over 1000 products per minute.

However, a paradox exists in many factories: the material feeding process, specifically the task of replacing heavy packaging film rolls weighing from 15 kg to over 150 kg, is still performed entirely manually. The disparity between machine speed and human handling capabilities inadvertently creates bottlenecks, not only reducing Overall Equipment Effectiveness (OEE) but also posing severe risks of occupational accidents. To eliminate this bottleneck, the application of Industrial Manipulators is becoming the solution of choice for many business owners, helping factories comprehensively solve three core problems: Productivity, Quality, and Safety.

The Current State of Film Roll Feeding in Confectionery Factories

The Nature of Heavy and Continuous Labour

To optimise machine runtime and minimise line stoppages, current confectionery factories tend to use jumbo packaging film rolls (Jumbo rolls). Consequently, the weight of a standard industrial film roll today varies significantly, from 15 kg up to more than 150 kg, with diameters reaching 600 mm to 800 mm.

Besides the massive weight, these film rolls typically have a low friction coefficient, making them slippery, and their cylindrical shape makes them extremely difficult to grip. In actual operations, workers frequently have to repeat the task of lifting these heavy loads from pallets (usually only 10-20 cm off the floor) and loading them onto the packaging machine's spindle (which can be chest-high or even overhead). The frequency of roll changes can be continuous, averaging every 15-30 minutes per machine.

Potential Risks of Maintaining Manual Lifting

Using human strength to handle this massive workload directly causes 3 core risks for businesses:

1. Worker Health (Ergonomic Risks):

• Manual lifting poses severe risks to the workers' musculoskeletal system. When bending over to lift a heavy film roll, the intervertebral discs in the lumbar spine (especially L5/S1) must withstand an enormous compressive force from the combined weight of the load and the upper body. The continuous repetition, combined with heavy loads and awkward postures (such as reaching over the machine frame or twisting the body), creates a risk triangle leading to Musculoskeletal Disorders (MSDs).
• It should be noted that the recommended weight limit of the NIOSH lifting equation for ideal conditions is only 23 kg, and this number drops below 10 kg under actual factory floor conditions.

2. Product and Material Quality:

• Packaging film is highly sensitive to mechanical impacts. During manual carrying, even a slight collision is enough to dent the roll's edges (telescoping phenomenon) or deform the inner paper core. As a result, the film roll cannot fit onto the machine spindle, or more seriously, it causes the film to tear when the packaging machine runs at high speed, leading to the waste of expensive raw materials.

3. Overall Equipment Effectiveness (OEE):

• The massive disparity between the operating speed of machinery and human manual handling capabilities not only reduces the Overall Equipment Effectiveness (OEE) but also causes bottlenecks in the production line. A slow feeding process prolongs machine downtime, disrupts the assembly line, and directly impacts output yield.

The Industrial Manipulator Solution for the Feeding Problem

To comprehensively resolve the difficulties in the material feeding stage, industrial manipulators introduce an entirely new method of operation, making massive loads feel virtually weightless.

The "Zero Gravity" Mechanism

At its core, an industrial manipulator is a mechanical system designed to balance the weight of the load. This equipment allows the operator to move objects in three-dimensional space with minimal applied force, close to zero (zero gravity).

Currently, two main control technologies are being developed in the market:

1. Pneumatic Technology: Utilises a cylinder system and logic valves to balance pressure, ensuring the lifting force completely neutralises the load's gravity. This technology is exceptionally safe for explosion prevention, making it highly suitable for areas with combustible food dust in confectionery factories.
2. Electronic Technology (Intelligent Assist Devices - IADs): Utilises load cells and Servo motors to continuously measure the load weight and the user's applied force. The microprocessor calculates in real-time, allowing the system to automatically recognise and balance the weight of any film roll instantly without prior configuration. This creates instantaneous feedback and provides a smooth, absolutely precise lifting experience.

Specialised Gripper Design: Absolute Material Protection

In the confectionery packaging manufacturing industry, keeping materials intact during transport plays a crucial role. To achieve this, the design of the end-effector that comes into direct contact with the film roll is the deciding factor. Currently, the core gripping method (Expanding Mandrel or Core Gripper) is evaluated by experts as the most optimal solution.

Regarding the operating mechanism, the procedure is very simple: the operator just inserts a metal shaft into the paper core of the film roll. As soon as the system is activated, the mechanical jaws or integrated rubber strips on the shaft automatically expand, pressing tightly against the inner wall of the core.

The greatest advantage of this method is ensuring that the lifting equipment makes absolutely no contact with the surface of the wrapping film. Thanks to this smart mechanism, businesses can thoroughly eliminate 100% of the risk of tearing, denting, or soiling the outermost packaging layer. Simultaneously, the internal core clamping mechanism helps secure the film roll firmly, effectively preventing the "telescoping" phenomenon—where film layers slide outward, damaging the roll's structure.

Flexible Rotation and Tilting in Narrow Spaces

In actual production, the transport and feeding process often requires flexible changes in the approach angle. Specifically, film rolls are usually stored and transported on pallets in a vertical position, with the roll's axis perpendicular to the floor. However, when introduced to the feeding line, the packaging machine's spindle is typically positioned horizontally.

To solve this posture conversion problem, the industrial manipulator is equipped with an automatic tilting mechanism—usually operated via a pneumatic cylinder system—helping to perform a 90-degree rotation and tilting operation easily and precisely.

The core of this design lies in the system being meticulously mechanically calculated to maintain the Center of Gravity of the load throughout the entire operation. As a result, the equipment eliminates shaking or imbalance. This not only allows the roll-tilting operation to proceed smoothly and quietly in tight spaces but also ensures absolute safety for the direct operator.

Outstanding Benefits of Applying Industrial Manipulators

The decision to invest in an industrial manipulator system is not merely about liberating human labour; it is essentially an economic move that yields a highly attractive Return on Investment (ROI), comprehensively impacting the factory's productivity, quality, and safety.

Breakthrough Productivity Increases and OEE Optimisation

Delays in manual film roll replacement are the very bottlenecks that reduce the OEE of the packaging line.

• Manipulators significantly minimise film roll replacement time, for example, shortening it from 15 minutes to just 5 minutes per changeover.
• For a production line running 2 shifts, saving 10 minutes per replacement (4 times/shift) frees up 80 minutes of production time each day.
• This surplus time allows a packaging machine operating at 100 packages/minute to produce up to an additional 8,000 products/day, bringing in massive marginal profits (estimated at up to 1.2 billion VND/year).
• In terms of personnel, instead of requiring 2 people coordinating to carry a 60 kg film roll, applying a manipulator allows just 1 person to handle it effortlessly, helping optimise payroll and save on labour costs.

Ensuring Absolute Safety and Protecting Worker Health

Besides optimising operating procedures, protecting worker health is an intangible benefit that brings the most long-term sustainable value to any manufacturing business.

By applying modern lifting equipment, workers are liberated from heavy manual carrying tasks, thereby completely eliminating the risk of spinal injuries, back pain, or herniated discs. Furthermore, proactively preventing workplace accidents at the root helps businesses avoid unnecessary legal risks and expensive compensation costs, which can amount to hundreds of millions of VND per incident.

From a human resources perspective, a safe working environment that minimises physical labour is the key to retaining a skilled workforce, enhancing employee engagement, and directly reducing the turnover rate at the factory.

Protecting Raw Materials, Reducing Waste

In a production environment, manual loading and transporting of film rolls always carries many uncontrollable risks. Inaccurate carrying, rolling, or lifting and pushing movements can easily cause impacts, dent the roll core, scratch the surface, or even result in drops that ruin the entire wrapping film.

However, when applying an industrial manipulator equipped with a specialised clamping mechanism, businesses can eliminate these unfortunate damage risks. By gripping and handling smoothly and accurately, the equipment helps protect the expensive packaging rolls throughout the transport and feeding process. This not only directly reduces the rate of raw material waste due to operational errors but also yields extremely significant annual savings on material costs for the factory.

Ultra-Fast Return on Investment (ROI) and Elevating Corporate Image

When compounding all the values derived from increased output, reduced labour, and minimised waste, the Payback Period for a manipulator system is incredibly impressive, potentially taking only about 4 months.

Even if the economic equation only accounts for savings from personnel costs while ignoring productivity gain benefits, the project could still break even in just over 2 years.

Finally, outfitting with modern manipulators also helps elevate the corporate image in the eyes of partners, perfectly fulfilling strict criteria when audited by international clients or regulatory agencies to achieve SA8000 or ISO 45001 standards.

Vietmani - The Genuine Manufacturer of Industrial Manipulators

Vietmani understands that investing in an industrial manipulator system is a strategic decision for a business, requiring the companionship of a partner with sufficient technical capacity and reputation. Proudly positioned as a genuine manufacturer of industrial manipulators in Vietnam, Vietmani delivers the most optimal solution to the feeding problem in confectionery factories:

• International Standard Quality (ISO 9001:2015): All equipment manufactured by Vietmani adheres to a strict quality management system, ensuring the highest durability and stability when operating continuously in the food industry environment.
• Outstanding Power from the HAS-Series: Vietmani's HAS-Series manipulators (Fixed column type) are specially designed to handle heavy loads. With flexible load capacities ranging from 40 kg to 140 kg, the equipment easily conquers all sizes of packaging film rolls. A wide working radius of up to 4000 mm alongside a vertical lifting stroke of 1800 mm helps cover the entire space from the pallet to the packaging machine spindle.
• "Zero KG Balancer" Technology & Absolute Safety: Utilising a pneumatic system (operating pressure of 0.7 - 0.8 MPa), Vietmani manipulators completely neutralise the weight of the film roll, delivering an effortless lifting sensation. Notably, the design incorporates a 360-degree rotary joint and a pneumatic brake system, ensuring absolute safety and preventing drops even in the event of a sudden loss of pressure.
• The Advantage of a Domestic Manufacturer: Instead of waiting for expensive and time-consuming imports of fully assembled equipment, Vietmani offers 100% customization capabilities for the clamping mechanism according to the exact film roll dimensions of each factory. Additionally, installation, warranty, and lifetime maintenance services are executed quickly right here in Vietnam.

Conclusion

In the race to optimise the confectionery production process, eliminating heavy manual film roll loading tasks is not merely a question of automation, but also the business's commitment to worker safety. Applying industrial manipulators is the key to helping factories break bottlenecks, liberate human labour, protect materials, and achieve breakthrough productivity with an exceptionally impressive Return on Investment (ROI).

Don't let heavy film rolls drag down the performance of your entire production line!

Is your business looking for a safe, optimal, and cost-effective feeding solution for your confectionery manufacturing plant? Contact Vietmani's engineering team today for in-depth consultation, on-site surveys, and completely free lifting solution design drawings.

Hotline: 0931.782.489