Station 1 - Bag loading and picking: the manipulator automatically picks up pre-made bags and clamps them into position; workers only need to load the hopper in batches.
Station 2 - Coding / zipper opening: optional inkjet / thermal printing of production date, and pre-opening of stand-up bag zippers.
Station 3 - Vacuum bag opening: upper and lower suction cups open the bag; empty / damaged bag detection → empty bags skip filling to prevent spillage.
Station 4 - Quantitative granule filling: matched with a multi-head combination weigher / volumetric metering discharge (dedicated for granules).
Station 5 - Secondary shaking and compacting (optional): shakes and compacts the material, reducing gaps in the bag and facilitating sealing.
Station 6 - Pre-sealing: heats and flattens the bag opening.
Station 7 - Main heat sealing: constant-temperature double-lane sealing, firm seal without material leakage.
Station 8 - Finished product discharge: cooling and unloading, discharge via conveyor belt; defective products can be optionally rejected.

Core Advantages

Compatible with pre-made finished bags: universal for stand-up bags, zipper bags, three-side seal, four-side seal, aluminum foil laminated bags, and handle bags — no film making needed, and the finished packaging bags look attractive.
Eight-station synchronized rotation, high efficiency: single-machine capacity of 35-60 packs/min, far higher than 4/6-station models, suitable for mass production workshops.
Precise granule metering: matched with a multi-head electronic combination weigher, metering accuracy ±0.5%-±1%, suitable for mixed grains, nuts, granular seasonings, and feed granules.
Whole machine in 304 stainless steel, food-grade material-contact parts, easy to clean, compliant with food GMP standards.
PLC touchscreen control: multi-specification bag type parameters storable, one-key bag width adjustment, changeover completed in 10 minutes; automatic alarm and shutdown for missing bags, material shortage, or overheating.
Modular options: can be fitted with vacuum device (moisture-proof vacuum packaging for dried goods), dust extraction, feeding elevator, and metal detector.

Applicable Granule Categories

Food: sunflower seeds, peanuts, green peas, beans and mixed grains, rock sugar, puffed granules, chicken essence / MSG, seeds, nuts and dried fruits.
Industrial / agricultural: feed granules, chemical granules, veterinary medicine granules, fertilizer granules.

Main machine + vertical feeding elevator + multi-head combination weigher = a complete automatic granule packaging line; it can connect upstream to an aluminum foil sealing machine and a bread bagging machine to form a full production line.