Case Study: Automatic Granule Bagging Line for Wood Pellets Delivers 700 Bags per Hour

Customer profile: a growing wood pellet fuel producer packing premium heating pellets for the domestic and export market. The project shows how the right packing machine configuration removes manual bottlenecks.

The Challenge

Manual bagging of wood pellets was slow, dusty and inaccurate. Two operators per shift filled 25 kg bags by hand, with bag weights varying by more than 0.5 kg and output capped at roughly 150 bags per hour. Labor costs were climbing, and inconsistent bag weight created complaints from retailers.

The Solution

Link Machinery supplied a complete automatic granule bagging line: an in-feed hopper with vibratory feeder, a precision electronic weigher and a vertical bagging machine with heat sealing and date coding. The line runs 25 kg and 50 kg wood pellet bags with fully automatic filling, sealing and counting.

Key Equipment Delivered

• Automatic granule metering and bagging machine with touchscreen PLC control
• High-accuracy electronic weighing system
• Automatic bag forming, filling and sealing
• Batch counting and production reporting

The Results

• Output: up to 700 bags per hour (25 kg), more than 4× the previous manual rate
• Accuracy: consistent bag weight within ±0.1 kg, eliminating complaints
• Labor: one operator supervises the whole line instead of two manual workers
• Reliability: stainless steel contact parts and 72-hour factory test before delivery

Customer Feedback

“We doubled our production capacity without adding staff. The weighing accuracy is excellent, and the machine is simple to operate,” said the plant manager. The line paid for itself within the first season of operation.

Link Machinery provides complete granule and pellet bagging solutions with engineering support from design to commissioning.