🤖 No more back pain: Why robotic palletizing is smarter than manual folding

Introduction: The hardest work at the end of the line

Every production process ends with the same task: someone has to stack the finished product, packed in a box or bag, onto a pallet. In practice, this means that the operator spends the entire shift in monotonous lifting and carrying of loads. The result? Back pain, high morbidity, fatigue, stacking errors and, last but not least, it is a bottleneck for the entire production.

Automated palletizing using robots was previously the domain of giant corporations with high-speed lines. Thanks to modern collaborative robots, it is now an affordable, flexible and cost-effective solution for small and medium-sized businesses.

Main part: Handwork vs. Robot

The Reality of Hand Folding: Hard Work That Doesn't Pay Off

Let's face it: manual palletizing is one of the least popular jobs in manufacturing.

• Physical strain: Lifting a 10kg box once a minute means moving 4,800kg per shift. This is an enormous strain on the back and joints, leading to incapacity for work and violation of hygiene limits for handling loads.
• Error rate: Fatigue leads to errors. A poorly stacked pallet is unstable and can collapse during transport, destroying the goods.
• Inconsistent pace: A human is not a machine. His pace fluctuates, he needs breaks. A robot works at the same pace 24 hours a day, 7 days a week.

How does robotic palletizing work?

The principle is simple: A robotic arm is placed at the end of a conveyor that brings in finished products (e.g. boxes).

• Gripping: The robot uses a special gripper to grab the product. For boxes, a vacuum suction cup or a collet gripper is often used.
• Transfer: The arm transfers the product to a precisely defined position on the pallet.
• Pattern: The robot stacks products according to a preset pattern (so-called palletizing scheme) to make the pallet as stable and efficient as possible.
• Padding: If necessary, the robot can itself remove and insert cardboard pads between individual layers to increase stability.

Once the pallet is full, the robot signals the operator (or AGV) to remove it and starts stacking on a new, empty pallet.

Collaborative robot (Cobot) changes the rules of the game

Previously, palletizing required large, fast industrial robots enclosed in a safety cage. This was expensive and took up a lot of space. Today, collaborative robots (cobots) are the hit.

Why are they so popular for palletizing?

• Safety: Cobots are designed to work with humans. After careful risk analysis, they often do not need massive fencing. A human can safely enter the space, replace a pallet, and the robot can continue working (e.g. at reduced speed).
• Flexibility: Need to change the folding pattern or box size? With a cobot, it's a matter of minutes in a simple graphical interface.
• Rapid deployment: Installing a palletizing cell with a cobot takes days, not weeks.

Recommended solutions for palletizing

For palletizing, you need robots with a higher payload and sufficient reach to cover the entire surface of a Euro pallet (1200 x 800 mm).

• Universal Robots UR16e: With a 16kg load capacity and a 900mm reach, it's a great choice for handling most boxes and smaller bags. Its bigger brother, the UR20, can handle even heavier loads.
• Dobot CR16: A very powerful cobot with a payload of 16 kg and a reach of 1000 mm at an attractive price. Ideal for companies that want a robust solution with a quick return on investment.
• Palletizing grippers (Grippers): The key to success is the right gripper. Vacuum grippers such as the OnRobot VGP20 are great for palletizing, as they can hold up to 20 kg and can even suck up porous cardboard.

Frequently Asked Questions about Robotic Palletizing (FAQ)

1. What is the return on investment (ROI) for a palletizing robot? Very fast. If the robot replaces one shift of manual labor, the return on investment is typically between 12 and 24 months. If the robot runs for two or three shifts, the return on investment is often under 10 months.

2. Does a palletizing cobot really need a safety cage? It depends on the risk analysis. If the cobot is handling light boxes and running in collaborative (slower) mode, a safety scanner that slows or stops the robot when a person approaches is often enough. For heavy loads or at high speed, fencing is still a must.

3. Is it difficult to program a new folding pattern? It's not. Most robot manufacturers (like Universal Robots) offer so-called "palletizing wizards" - simple software add-ons where you literally "click" the pattern on a tablet without having to write a single line of code.

Conclusion: Investing in health and efficiency

Robotic palletizing is not just about increasing speed. It is about removing the most physically demanding and unsafe work from your production. You give people the opportunity to do more skilled work (quality control, set-up) while gaining a stable, predictable and non-stop running process at the end of the line.

Stop breaking your employees' backs and gain a competitive advantage. Visit svet-robotu.cz and find a palletizing solution that's worth it for you.