Three-dimensional Material Warehouse & Automatic Loading and Unloading Robot

The interface between storage and production has always been a bottleneck. Sheets arrive from the warehouse, but getting them onto the machine table often requires manual lifting, positioning, and clamping—steps that introduce variability, risk injury, and consume productive labor hours. Herochu solves this with a fully integrated system combining a Three-Dimensional Material Warehouse with an Automatic Loading and Unloading Robot. This pairing creates a seamless material flow from vertical storage to machine bed and back again, with no human hands touching the sheet between incoming inspection and finished part removal.

The three-dimensional material warehouse forms the backbone. Available in Mono Tower, Double Tower, or full Multi-Tower configurations, these vertical storage units hold board materials in individual trays or cassettes. Each tray is accessed by a servo-driven lift that travels vertically along the tower’s full height, stopping at precise positions to retrieve or store loads. The Mono Tower serves as the basic building block—a single column with one lift, ideal for machine-side staging or point-of-use storage. For example, positioning a Mono Tower next to a laser cutter allows the machine to pull raw sheets on demand and return skeletons or finished parts to open storage positions, creating a closed-loop work cell with minimal operator involvement.

The Double Tower configuration adds capacity without duplicating the most expensive component—the lift mechanism. Two parallel towers share one centrally located lift, which uses a transfer trolley to move horizontally between columns. This arrangement effectively doubles storage positions while keeping equipment costs significantly lower than two independent Mono Towers. The Double Tower excels at applications requiring both raw material input and finished part output at a single workstation, or when a production line needs immediate access to two different material grades or thicknesses.

Where the system truly distinguishes itself is the automatic loading and unloading robot. This is not a generic industrial arm bolted onto a warehouse—it is a purpose-built manipulator engineered specifically for flat sheet handling. The robot’s main body is fabricated from high-strength steel pipe and premium steel plate, welded as a complete structure and then subjected to vibration stress relief treatment. This process eliminates internal stresses that could cause distortion over time. After stress relief, the entire frame is machined on a large-scale CNC gantry milling machine, ensuring all mounting surfaces, guide rails, and actuator interfaces are flat, square, and parallel to tolerances below 0.1mm. The result is a rigid, stable platform capable of positioning sheets with repeatable accuracy shift after shift.

The fork mechanism—the part that physically contacts the sheet—deserves special attention. Forks are made from heat-treated high-strength steel, then hard-chromium plated and polished to a mirror finish. This combination of treatments produces a surface that is exceptionally hard, wear-resistant, and smooth. The low coefficient of friction allows sheets to slide onto the fork without scratching, even when handling pre-coated or mirror-finish materials. The fork’s contact area with the plate is deliberately minimized through optimized tine geometry, further reducing the risk of surface marks. For manufacturers processing painted, anodized, or vinyl-laminated sheets, this scratch-free performance is non-negotiable.

Loading cycles operate on a typical timeline of under 180 seconds from command to delivery. The sequence begins when the production machine sends a material request—either through direct I/O or via the central WMS. The warehouse lift moves to the position containing the requested sheet, retrieves the tray, and lowers it to the discharge height. The automatic loading robot extends its forks, picks the sheet from the tray, and transfers it to the machine’s loading table or directly into the work area. For unloading finished parts or skeletons, the reverse sequence occurs: the robot retrieves items from the machine and returns them to an open storage position in the warehouse. Throughout this process, the system logs every transfer for inventory tracking and quality assurance.

Operational parameters support heavy industrial use. The material trolley—which moves trays between the lift and the robot transfer station—carries up to 3000kg at a running speed of 10m/min. Supply pressure of 0.6-0.7Mpa powers pneumatic clamping or auxiliary functions, while the main drives run on 380V/80A electrical supply. The lifting operating speed of ≤12m/min balances throughput with gentle material handling, avoiding the sudden starts and stops that can shift loads or damage edges.

Safety features are comprehensive. Full perimeter guardrails prevent unauthorized access to moving parts. Light curtains or laser scanners can be added to create safety zones around the robot’s working envelope. Servo drives include torque monitoring that detects obstructions and stops motion within milliseconds, preventing damage to the machine, the material, or any person who might inadvertently enter the area. Emergency stop buttons are positioned at every operator station and at key points around the equipment.

The intelligent automatic start/stop system brings energy efficiency to the integration. When the production machine is idle—during shift changes, lunch breaks, or maintenance periods—the warehouse and robot automatically power down non-essential systems. Lifts enter a low-power holding mode, conveyors stop, and the robot’s servos disengage. As soon as a new material request arrives, the system wakes up and resumes operation within seconds. This feature reduces electricity consumption, lowers cooling loads on factory HVAC systems, and extends the service life of mechanical components by reducing cumulative run time.

For manufacturers evaluating automation, the Herochu Three-Dimensional Material Warehouse with Automatic Loading and Unloading Robot offers a clear upgrade path. Start with a single Mono Tower feeding one machine. Add a second tower when volume grows. Integrate the robot to multiple discharge stations as your production line expands. The modular design ensures that today’s investment remains fully compatible with tomorrow’s needs.