Automatic Bag Palletizer

Product Description

The SunAura SNA-ABP800 is a fully automatic bag palletizer purpose-built for open-mouth sack handling in heavy-duty industrial environments. Woven PP sacks, paper valve bags, and PE bags weighing 10–50 kg are picked from the infeed conveyor by a programmable gripper head and placed onto the pallet in a staggered interlocking pattern. The machine is fully enclosed with dust-tight panels — critical for cement, fly ash, chemical powder, and animal feed operations where airborne dust is both a safety hazard and a maintenance burden.

Two gripper configurations are available: a mechanical clamp for rigid paper and valve bags, and a vacuum cup array for soft woven PP and PE bags. The gripper rotates 90° between rows so bags lay flat and interlock on the pallet, producing a stack that wraps cleanly and survives forklift transport. Up to 20 pallet patterns are stored in the PLC, and changeover between bag types takes place from the touchscreen HMI without mechanical adjustment for standard sizes.

The SNA-ABP800 handles stacks up to 1800 mm high on standard 1200×1000 mm pallets. The frame is welded heavy-gauge steel with dust-resistant bearing seals and sealed linear guides. Every unit undergoes a full load test with customer-supplied bags before shipment. CE-compliant guarding and interlocked access doors come standard.

Technical Specifications

Key Features & Benefits

• Handles 10–50 kg bags across all sack types: Woven PP, paper, and PE bags are all within the gripper’s reach — no separate machine for different bag materials.
• Dust-proof enclosed design: Sealed panels, dust-tight bearings, and covered linear guides keep cement, powder, and chemical dust out of the drive train — essential for long service life in dusty environments.
• Mechanical clamp or vacuum gripper: Choose the gripper best matched to your bag type. Clamp grips rigid paper and valve bags; vacuum handles soft woven PP without tearing.
• 20 programmable pallet patterns: Staggered, interlocking, and brick patterns stored as recipes. Rotate 90° between rows for maximum stack stability on uneven loads.
• Up to 800 bags/hour: Matches the discharge rate of most bagging machines — no upstream bottleneck when bags are automatically palletized.
• Heavy-duty welded frame: Built for 24/7 operation in cement, fertilizer, and grain facilities. Welded steel construction resists vibration and impact over millions of cycles.
• Automatic bag singulation: Separates bags from the infeed conveyor at a controlled pitch so the gripper always picks one bag cleanly.
• CE-compliant enclosed guarding: Interlocked access doors and safety switches prevent operator entry during operation — meets European machinery safety standards for dusty industrial environments.

Application Industries

Load compatibility: Open-mouth and valve bags weighing 10–50 kg in woven PP, paper, or PE. For rigid cases or cartons, see our High-Level or Low-Level Case Palletizer. For very heavy bags over 50 kg, see our Heavy-Duty Robotic Palletizer 180kg.

How Automatic Bag Palletizing Works

Bag palletizing uses a pick-and-place gripper that lifts each sack from the infeed conveyor and lays it onto the pallet in a programmed pattern. On the SNA-ABP800, the cycle runs automatically as bags arrive from the bagging machine:

1. Bags arrive on the infeed conveyor. The upstream bagging machine fills, seals, and drops bags onto the inclined infeed conveyor, which feeds them into the singulation station.
2. Bag singulation. A timing screw or lug separator spaces bags at a controlled pitch so the gripper always picks one bag at a time without collision.
3. Gripper picks the bag. The mechanical clamp closes on the bag’s top edge, or the vacuum array seals to the bag surface. Sensors confirm a secure grip before lifting.
4. Bag rotates and places on pallet. The gripper rotates 90° (per recipe) and lowers the bag onto the pallet in the programmed position. Bags are placed flat, not on edge, for stack stability.
5. Layer builds and repeat. Bags are placed row by row across the pallet. When the layer is complete, the lift descends by one bag thickness and the next layer begins. The cycle repeats to 1800 mm stack height.

Is This the Right Bag Palletizer for You?

The SNA-ABP800 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. Bags, not cases or cartons: This machine handles open-mouth and valve sacks. If your product ships in corrugated cases, see our Case Palletizers instead.
2. Throughput under 800 bags/hour: At 800 bags/hour, this matches most single-bagging-machine lines. If you run two bagging machines in parallel, consider our Heavy-Duty Robotic Palletizer for dual-line feeding.
3. Dusty or powdery product: The dust-proof enclosure is designed for cement, powder, and granular products. If your product is dry and clean (e.g., dry grain), the dust protection is still beneficial for machine longevity.
4. Bag weights 10–50 kg: The gripper and frame are rated for this range. Bags over 50 kg (e.g., bulk sacks) require a robotic palletizer with higher payload.

Troubleshooting Guide — Common Issues & Solutions

Bag palletizers in dusty industrial environments face unique challenges — dust ingress, bag slippage, and pattern misplacement are the most common. Below are the issues our service team diagnoses most often. Always lock out energy sources before servicing the gripper or infeed.

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

Frequently Asked Questions

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Browse the full range on the palletizers landing page. Also explore our high-level layer palletizers and low-level case palletizers to build a complete end-of-line solution.