Automated Case Picking: The Role of Coordinated Conveyor Systems

As e-commerce and grocery sectors in the Benelux continue to demand faster, more accurate order fulfillment, warehouses are shifting from manual, labour-intensive processes to automated case picking. This evolution is not just about adding a robot; it's about creating a cohesive, fully integrated system where intelligently coordinated conveyors are the vital arteries, ensuring a smooth, continuous flow of goods from storage to dispatch. This article explores the central role of these conveyor systems in modern case picking operations within the Netherlands, Belgium, and Luxembourg.

Definition

Automated case picking is a warehouse process where full cases of products are automatically retrieved from storage, transported, and sequenced to build mixed-case pallets or roll cages for specific customer orders, with minimal human intervention. This process relies on a combination of robotics, software, and conveyor systems to achieve high throughput and accuracy.

Key Numbers

The Anatomy of an Automated Case Picking System

A typical automated case picking solution isn't a single machine but a symphony of integrated technologies. The process generally follows a logical, automated sequence orchestrated by a Warehouse Execution System (WES), which manages the real-time flow of tasks and equipment.

Step 1: Robotic Depalletizing

The process begins with full, single-SKU pallets being brought to a robotic depalletizing station, often from an AS/RS (Automated Storage and Retrieval System). A robot, equipped with advanced vision systems and specialized grippers, identifies and picks individual cases from the pallet. These cases are then placed onto a takeaway conveyor, officially inducting them into the automated workflow.

Step 2: Conveyor Transportation and Buffering

This is where the conveyor network takes center stage. A system of roller conveyors and belt conveyors transports cases from the depalletizing cell. A crucial component here is an accumulation conveyor, which uses zero-pressure accumulation (ZPA) technology. This allows cases to buffer without contact, creating a steady, queued flow of products ready for picking and preventing bottlenecks. The WES directs each case along the optimal path.

Step 3: Sequencing and Order Assembly

The conveyor system routes cases to a central robotic picking cell. Here, one or more robots pick the required cases from the buffer lanes and place them onto an order pallet or roll cage. The WES provides the robot with the exact sequence to ensure pallet stability, placing heavier items at the bottom and lighter or fragile items on top. This intelligent sequencing is a key advantage of automated systems.

Step 4: Automated Palletizing and Dispatch

Once the mixed-case pallet is complete, it is automatically conveyed away from the picking cell. It may be stretch-wrapped, automatically labeled (a process known as SLAM or Scan, Label, Apply, Manifest), and then transported to the outbound shipping docks, often via a pallet conveyor system. The entire journey, from storage to a fully-loaded, ready-to-ship pallet, happens seamlessly.

Why Coordinated Conveyors Are the Linchpin

While robots get most of the attention, the conveyor system is the unsung hero. Without intelligent coordination, the system would grind to a halt. The WES acts as the brain, but the conveyors are the nervous system, executing commands precisely.

• Decoupling Processes: Conveyors with accumulation zones decouple the depalletizing and palletizing steps. This means the depalletizing robot can work at its maximum speed without being limited by the palletizing robot's pace, and vice-versa.
• Creating a "Goods-to-Robot" Flow: In essence, this setup transforms a complex task into a goods-to-robot principle. Instead of a robot moving to thousands of pallet locations, the required goods (cases) are brought directly to it in a predictable, sequenced manner.
• Flexibility and Scalability: Modern modular conveyor systems allow for future expansion. As a business grows, new conveyor lines, buffering zones, and robotic cells can be added to the existing network. As we often see, companies grow, but their processes don't always keep up, making modularity a key design principle.

Technology Comparison: Key Conveyor Types

Different types of conveyors play specific roles within an automated case picking system. The selection depends on the specific function, such as transportation, accumulation, or sorting.

The Software Layer: WMS, WCS, and WES

Intelligent coordination is impossible without the right software. A Warehouse Management System (WMS) manages the overall inventory and order pool. It sends order requirements to the Warehouse Execution System (WES). The WES is the real-time brain, directing the robots and conveyors (via the Warehouse Control System or WCS functionality) to execute the tasks in the most efficient sequence. It optimizes the flow of cases, manages the buffers, and ensures the robots are working in harmony.

The Business Case in the Benelux

For logistics operations in the Netherlands and Belgium, which serve as primary gateways to Europe, the drivers for automating case picking are particularly strong:

1. High Labour Costs & Scarcity: The region faces a persistent shortage of warehouse labour. Automation provides a reliable, 24/7 operational capacity that is less dependent on the fluctuating labour market.
2. Demand for Accuracy & Speed: Retailers and e-commerce giants demand near-perfect orders (OTIF > 99%) and next-day or even same-day delivery. Manual picking struggles to consistently meet these KPIs at scale.
3. Space Optimization: With high industrial real estate costs (e.g., around the ports of Antwerp and Rotterdam), automated systems that use vertical space and dense layouts are financially attractive.

Easy Systems: Your Partner for Integrated Conveyor Solutions

At Easy Systems, we understand that automated case picking is an integrated process, not just a collection of machines. As a leading Benelux provider of modular conveyor systems, we specialize in designing and delivering the intelligent transport infrastructure that forms the core of these solutions. Our expertise lies in creating robust, scalable, and efficient roller, belt, and pallet conveyor networks that seamlessly integrate with robotics and WES software. We partner with system integrators and end-users to engineer the physical flow that unlocks the full potential of your automation investment, ensuring your warehouse is ready for the demands of tomorrow.