Automatic Screw Nut and Bolt Weighing Packing Machine with Multihead Weigher
-
-
-
-
-
Application
This screw packing machine is designed for weight-based packaging of bolts, nuts, screws, washers, nails, furniture fittings and other small hardware components. A multihead weighing system portions the hardware before the VFFS unit packs it into sealed bags.
Package Type
Designed for roll-film packaging with pillow and back seal bag formats. A gusset-forming configuration can also produce larger hardware packs where extra bag volume is required.
Workflow
1. Product Feeding, 2. Combination Weighing, 3. Roll Film Unwinding, 4. Pouch Forming, 5. Fastener Dosing, 6. Back Sealing, 7. End Sealing, 8. Cutting, 9. Pack Discharge, 10. Features
Features
1. Uses multihead combination weighing for weight-based packing of hardware components.
2. Packs screws, nuts, bolts, washers, nails and similar small metal or plastic fittings.
3. VFFS structure converts roll film into finished hardware bags during production.
4. Multihead weighing suits products with different shapes and individual piece weights.
5. Packaging settings can match different target weights and bag dimensions.
6. Roll-film packing supports common hardware bag formats without using premade pouches.
7. The machine combines weighing, filling, sealing and cutting in one packing process.
Technical Parameters
| Model | BP-320A | BP-380A | BP-420A | BP-520A | BP-720A |
| Packing size | W:50-150mm | W:70-200mm | W:80-200mm | W:90-250mm | W:110-350mm |
| L:50-200mm | L:50-300mm | L:50-300mm | L:80-350mm | L:100-420mm | |
| Packing speed | 20-60 bag/min | 10-60 bag/min | 15-80 bag/min | 30-80 bag/min | 10-60 bag/min |
| Range of measuring | 700ml | 150-1500ml | 150-1500ml | Max 1500ml | Max 4000ml |
| The max width of packing film | 320mm | 420mm | 420mm | 520mm | 720mm |
| Air consumption | 200L/min 0.6MPa | 200L/min 0.6MPa | 200L/min 0.6MPa | 200L/min 0.6MPa | 300L/min 0.8MPa |
| Main power/voltage | 2.7KW/220V 50-60Hz | 2.5KW/220V 50-60Hz | 2.2KW/220V 50-60Hz | 2.2KW/220V 50-60Hz | 4.0KW/220V 50-60Hz |
| Main power/voltage | 350KG | 450KG | 450KG | 450KG | 800KG |
| Dimension | (L)1100* (W)800*(H)1940mm | (L)1400*(W)970*(H)1700mm | (L)1400*(W)970*(H)1700mm | (L)1480* (W)1200*(H)1700mm | (L)1780*(W)1350*(H)2000mm |
| Film thickness | 0.04-0.10mm | ||||
| Bag making mode | Pillow-type bag, Standing bag, punching device, Link-bag device | ||||
| Bag making mode | POPP/CPP,POPP/VMCPP,BOBB/PE,PET/VMPET/PE,PET/AL/PE,NY/PE,PET/PET | ||||
FAQ
Does this machine count screws or weigh them?
This configuration uses a multihead weigher and packs hardware by target weight rather than by fixed piece quantity.
What hardware products can it pack?
It can handle screws, nuts, bolts, washers, nails, anchors and other loose hardware parts suitable for multihead weighing.
When should I choose weighing instead of counting?
Weight-based packing suits products sold by pack weight or applications where exact piece quantity is not required. Piece-count packaging should use a dedicated counting system.
Can I change the target weight for different products?
Yes. Operators can set different target weights within the configured weighing range.
What bag formats can the machine produce?
The VFFS packing unit produces pillow bags and center back seal bags directly from roll film.
Can it pack different screw and bolt sizes?
Yes, provided the hardware dimensions and weight suit the configured multihead weigher, feeding system and bag size.
What affects the actual packing speed?
Target weight, hardware size, weighing combination time, bag dimensions and film settings all affect output. The confirmed maximum is up to 60 bags/min under suitable settings.
