This rotary multi-station packaging machine is specially developed for ultra-fine powder materials and powders with poor flowability. It is a fully automatic rotary bag-given packaging unit, widely used in grain & oil starch, fine chemical and feed raw material industries. It enables unmanned operation of the entire production line and serves as a mainstream high-end model for flour and starch production lines.
1. Working Process
Cyclic operation of multiple stations
- Automatic bag feeding: The bag bin automatically picks up prefabricated woven bags / composite film bags.
- Bag opening & inspection: Negative pressure bag opening. If no bag is detected or the bag fails to open, the station will be skipped automatically without material feeding.
- Filling station: Bottom-mounted weighing system with two-stage feeding (coarse feeding + fine feeding).
- In-bag vibration compaction: Vibration and air exhaust during material filling to solve problems of fluffy powder and bulging bags.
- Negative pressure dust removal: Closed dust collection to suppress dust generation during feeding.
- Bag mouth shaping: Flatten the bag mouth to prepare for subsequent sewing or heat sealing.
- Sealing & conveying: Deliver bags to sewing machines or heat sealing equipment.
- Empty standby station: Fault-tolerant buffer to ensure continuous operation.
Core structural advantage: Bottom weighing design (the weighing unit is installed under the bag). Compared with top-weighing models, it reduces impact from falling ultra-fine powder and delivers higher metering stability, making it highly suitable for high-air-content powders such as starch and protein powder.
2. Basic Technical Parameters
| Элемент | Параметр |
|---|---|
| Packing weight range | 2.5～25kg (standard 10kg / 25kg); customized 50kg specification available |
| Production capacity | Max. 600 bags/hour for 25kg bags |
| Weighing accuracy | ±0.1%～±0.2% under stable working conditions |
| Applicable bags | Woven bags, PE composite bags, coated film bags (prefabricated open-mouth bags) |
| Power supply | AC380V 50Hz; customizable 415V 60Hz for export |
| Total installed power | 25kW; stable operating power approx. 15kW |
| Air source requirement | Compressed air ≥0.6MPa, air consumption ≥27m³/h |
| Overall machine weight | Approx. 6,200kg |
3. Core Advantages
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8-station rotary parallel operation for continuous high-speed production The rotary table rotates intermittently with 8 stations working simultaneously, greatly boosting output compared with single-station packaging machines. The whole process runs fully automatically; workers only need to replenish bags regularly, drastically cutting labor demand on site.
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Specialized air exhaust and dust removal system for powder materials Equipped with built-in bottom bag vibration compactor and fully enclosed negative pressure dust removal pipelines. It quickly exhausts air inside bags for ultra-fine powders like wheat flour and starch, preventing bulging bags and damage during stacking, while improving dust control in workshops.
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Stable weighing performance for high-air-content powders The bottom dynamic weighing structure effectively buffers impact from falling powder. PLC dynamic compensation algorithm automatically adjusts feeding volume when material density fluctuates.
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High operational stability Patented bag picking and opening mechanisms achieve an automatic bag feeding success rate ≥99.8%. Complete fault alarm and interlock shutdown protection for issues such as missing bags, material blockages and out-of-tolerance weight.
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Intelligent control system Adopts Siemens PLC and touch screen operation panel. Weight parameters, turntable speed and station speed can be adjusted with one click. It supports connection to factory DCS upper computer systems and can be integrated with robot palletizers to form a full automatic production line.
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Easy maintenance Modular design allows quick disassembly and replacement of wearing parts. We maintain multiple regional service centers nationwide and provide after-sales guidance for overseas equipment. The machine meets export assembly standards and CE documentation can be provided.
4. Applicable Industries & Materials
- Grain & Food: Wheat flour, corn starch, cassava starch, rice flour, wheat bran
- Feed Industry: Soybean meal, premix feed, protein feed powder
- Fine Chemicals: Various powdered chemical raw materials, bentonite, non-metallic mineral powder
5. Optional Supporting & Upgrading Configurations
Rear-end matching equipment
Automatic sewing machine, belt conveyor, bag shaping & flattening machine, robot palletizer unit
Optional upgrades
Heat sealing device, automatic inkjet printing for bag surface, pre-vacuum air exhaust module, explosion-proof electric control system (for chemical powder scenarios)
