Heavy-Duty Four-Axis Robotic Palletizer (180kg Payload)

Product Description

The SunAura heavy-duty four-axis robotic palletizer is engineered for the loads and environments that defeat standard robots: 25–50kg cement, mortar, fertilizer, flour and chemical bags, stacked to multi-layer pallets in dusty, abrasive, occasionally wet production halls. This is not a general-purpose arm pressed into heavy service — it is a purpose-built 4-axis palletizing robot with a reinforced wrist, over-sized bearings, and IP65 protection so dust and water spray cannot get into the drives.

Its 180kg payload and 2600mm reach let it pick a heavy bag (or two lighter bags together) and place it across a full standard pallet at up to 12 cycles per minute. Repeatability is ±0.8mm — looser than the lighter 120kg model, but more than enough for coarse bag patterns where bags are deliberately laid in overlapping rows. A heavy-duty mechanical gripper EOAT cradles the bag body and folds the corners under as needed to build a stable brick pattern. The arm is bolted to a reinforced pedestal foundation, and the cell includes interlocked safety fencing for continuous unattended operation.

Powered by 380V 3-phase, the cell is designed for multi-shift, high-duty-cycle operation in cement, fertilizer, chemical, building-material and mineral processing. Every unit undergoes a 48-hour continuous run test before shipment and ships CE certified. Send us your bag samples, pallet size and hourly output — our engineers will specify the gripper and test the bag pattern before you order.

Technical Specifications

Key Features & Benefits

• 180kg heavy-duty payload: Handles 25–50kg cement, fertilizer and chemical bags with ease, and can pick two lighter bags together for higher effective throughput.
• Reinforced wrist and over-sized bearings: The wrist and joint bearings are upsized for repeated heavy lifts and the side loads of gripping soft bags — longer service life in abrasive duty.
• IP65 dust-tight protection: Drives and arm are sealed against cement dust and water spray, so the robot keeps running in the dusty, washdown-prone environments that would disable a standard IP54 arm.
• Heavy-duty bag gripper EOAT: A reinforced mechanical gripper holds the bag body and can fold bag corners to form tight, stable brick patterns that do not collapse under their own weight.
• 2600mm reach for tall, wide loads: Reaches the far edges of a full standard pallet and builds tall multi-layer bag stacks without needing a track or second cell.
• High-duty-cycle construction: Designed for multi-shift, near-continuous operation in cement, fertilizer and mineral plants where the machine runs when the line runs.
• Recipe-driven bag patterns: Store bag dimensions and stacking patterns by product on the HMI. Operators select by name for quick changeover between bag types.

Application Industries

Load compatibility: Heavy woven and paper bags, sacks and rigid bulk containers up to 180kg per pick. For lighter carton-only lines, the 120kg model offers better cycle economy.

How the Heavy-Duty Bag Palletizer Works

Bag palletizing differs from carton stacking because soft bags deform and must be laid in an overlapping brick pattern to stay stable. The cycle runs as follows:

1. Bags arrive on the infeed conveyor. Filled bags come off the bagging machine and are separated and stopped at the pick station, often flattened by a pre-conditioning conveyor.
2. Heavy-duty gripper picks the bag. The reinforced mechanical jaws close around the bag body; corner folders (if fitted) tuck the bag ends for a tighter, more stable placement. A grip sensor confirms the hold.
3. Arm carries the heavy bag to the pallet. The 180kg arm swings the bag across the work envelope, keeping it level so powder or granules do not shift inside the bag.
4. Bag laid in the overlapping brick pattern. The arm places each bag to overlap the row below, building a self-supporting wall. The HMI advances the pattern and counts rows and layers.
5. Layer complete — pallet grows. The arm descends to the new layer height and continues. Slip sheets may be inserted between layers on request. When the pallet reaches its programmed height, the cell signals for a forklift to remove the loaded pallet.

Is This the Right Palletizer for You?

This 180kg heavy-duty robot is the right fit if your operation matches all four of the following. If you fall outside any of them, our team can recommend a different SunAura model:

1. Heavy bags or bulk loads up to 180kg: This arm is sized for 25–50kg (and up to 180kg) heavy bags, drums and bulk containers. If you palletize light cartons under 50kg, the 120kg or dual-station robot gives you faster cycles at lower cost.
2. Dusty, abrasive or washdown-prone environment: IP65 protection and a sealed arm are essential in cement, fertilizer and mineral plants. For a clean, dry room running cartons, IP54 is overkill — the 120kg model suffices.
3. Throughput around 10–12 bag cycles/min: The heavy arm is durable but not as fast as lighter robots because of the mass it accelerates. For the absolute highest bag throughput in a steady product, a dedicated automatic bag palletizer or gantry system may be faster.
4. Multi-shift, near-continuous duty: The reinforced construction is built for when the machine runs most of the week. If you run light, intermittent shifts, a smaller robot is more economical to buy and run.

Troubleshooting Guide — Common Issues & Solutions

Heavy-duty bag palletizers run in some of the toughest factory conditions, so dust, wear and bag deformation are the recurring themes. Below are the most common problems we diagnose remotely. Always lock out and tag out energy before entering the fenced cell.

If the issue persists after trying these steps, email photos and a short 10-second video to [email protected] — our engineers usually diagnose the root cause within one business day.

Frequently Asked Questions

Related Palletizers

Four-Axis Robotic Palletizer (120kg)

Automatic Bag Palletizer

Gantry Palletizer System

Dual-Station Robotic Palletizer

Browse the full range on the palletizers landing page. Also explore our induction sealers and filling machines to build a complete packaging line.