Open-Mouth Bagging & Sewing Machine
Behpoo open-mouth bagging machines fill pre-made sacks from 5 to 50 kg and close them by sewing or heat sealing. Four automation classes cover 150 to 2,500 sacks per hour.
An open-mouth bagging machine fills sacks that arrive ready-made. The sack is placed on a filling spout and clamped, the weighed dose is discharged, the sack is released onto a conveyor and its mouth is closed by a sewing head or sealer.
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Behpoo supplies the full automation range, from manual stations where the operator places each sack, up to carousel machines with several filling spouts running in parallel.
One characteristic distinguishes this machine from FFS: throughput is far less dependent on bag weight. Sewing time does not change with how heavy the sack is, so a 50 kg line can run at nearly the same rate as a 25 kg line. That makes open-mouth bagging the usual choice at the heavy end.
The counterpart is the consumable. A pre-made sewn sack costs more per unit than film from a roll, so the machine is typically cheaper to buy and more expensive to run. Where the sack itself is part of the product presentation, that trade is worth making.
Benefits & Features
- Sack weights 5 – 50 kg
- Throughput 150 – 2,500 sacks/hour by class
- Throughput largely independent of sack weight
- Sewing, heat sealing and folded-and-sewn closing
- Net weighing with coarse and fine feed
- Automatic bag magazine on automatic classes
- Handles woven PP, paper multi-wall and lined sacks
Product Range
| Type | What it is | Typical use |
|---|---|---|
| Manual | Operator places the sack on the spout and guides it to the sewing head | Low tonnage, frequent product changes, wide sack variety |
| Semi-Automatic | Operator only places the sack; clamping, filling, release and sewing are automatic | The most common industrial choice — best cost-to-output balance |
| Automatic Single-Spout | Bag magazine and automatic placing arm; no operator in the cycle | Continuous high tonnage on a stable product |
| Automatic Carousel | Several filling spouts in parallel on a rotating carousel | Highest throughput, single-product lines |
Available Options
| Option | Choices |
|---|---|
| Automation | Manual · Semi-automatic · Automatic single-spout · Carousel |
| Closing | Sewing head · Heat seal · Fold-over and sew · Tape-over stitch |
| Weighing | Net weigh hopper · Gross weighing on the spout |
| Feed | Gravity · Screw · Air-assisted |
| Sack type | Woven PP · Paper multi-wall · Laminated · Lined |
| De-aeration | None · Vibrating deck · Vacuum de-aeration |
| Safety | Standard · ATEX |
Technical Specification
| Parameter | Unit | Range |
|---|---|---|
| Sack weight | kg | 5 – 50 |
| Throughput — manual | sacks/h | 150 – 400 |
| Throughput — semi-automatic | sacks/h | 400 – 700 |
| Throughput — automatic single-spout | sacks/h | 600 – 1,200 |
| Throughput — carousel | sacks/h | 1,200 – 2,500 |
| Operators required | — | 0 – 2 |
| Weighing accuracy | % of target | ±0.1 – ±0.5 |
| Compressed air pressure | barg | 6 – 7 |
| Installed power | kW | 4 – 18 |
| Footprint L×W×H | m | 2.5×2×3.5 to 6×5×5 |
Areas & Application
Cement & Gypsum
25 and 50 kg sacks on high-tonnage lines, where sack weight would cap an FFS line but barely affects sewing rate.
Fertilizer & Agriculture
Granular fertilizer and seed in woven PP sacks, often with printed sacks forming part of the brand presentation.
Animal Feed & Aquaculture
Pellets and meal in paper and woven sacks, with lined sacks where moisture protection is required.
Grains & Flour
Rice, flour and sugar in food-grade sacks, in stainless steel execution.
Polymers & Chemicals
Granules and powders in lined sacks, in ATEX execution where dust is combustible.
Options & Compliance
- MaterialsPainted carbon steel · SS304 · SS316 for product-contact parts
- Hazardous areaATEX execution for Zone 20 / 21 / 22
- EnclosureIP55 standard · IP65 washdown
- Control interfaceProfinet · Modbus TCP · EtherNet/IP with recipe management
- StandardsOIML R61 accuracy classes · OIML R87 prepackage content · FDA CFR 21 and EU 1935 for food contact · ISO 12100
Tell us your tonnage, sack weight and sack type — we will confirm the automation class and closing method.