Fanfold Pre-opened Poly Bag Making Machine with Zig-zag Folding
The PRE-600 converts a reel of single-layer poly film into fanfold pre-opened bags on a roll with zig-zag point connections. The machine produces bags that are ready for automatic feeding into autobaggers, reducing manual labour and improving throughput. The process includes unwinding, forming the zig-zag fold, heat sealing, cutting, and rewinding in one continuous line. This allows packaging producers to supply pre-opened bags directly to e-commerce fulfilment lines or 3PL operations without relying on third-party suppliers.
- Replaces manual bagging with pre-opened bags that feed automatically into autobaggers
- Zig-zag point connection allows consistent unfolding and reliable feeding on automated lines
- Production speed ranges from 30 to 150 bags per minute, matching downstream line speeds
- Automatic counting and high-limit stopping prevent overruns and reduce waste
- Single-layer poly film processing keeps material costs low compared to laminated films
Why Buyers Choose It
- Manual bagging is slow and inconsistent, especially during peak order volumes
- Pre-opened bags from external suppliers carry a markup and may have long replenishment lead times
- Inconsistent bag size or fold quality causes jams or misfeeds on automated bagging lines
- Lack of on-site bag production capacity forces reliance on third-party suppliers
Who Runs This Machine
- Poly bag makers producing pre-opened bags on a roll for automated packaging lines
- Fulfilment centres that run autobaggers and need a reliable source of pre-opened bags
- Packaging converters adding fanfold bag capacity to their existing poly film converting lines
- Manufacturers of consumer goods or pet products that require consistent, automated bagging
Where This Machine Is Used
- E-commerce fulfilment centres running high-speed autobag lines that require consistent pre-opened bags
- 3PL operators converting poly film reels into pre-opened bags on site to reduce dependency on external suppliers
- Poly bag makers expanding capacity to supply pre-opened bags on a roll to automated packers
- Packers using pre-opened bags for consumer goods, pet products, or household items that need fast, reliable packaging
Features And Specifications
Technical features
- Unwinds film from a 3 inch (76 mm) core with maximum diameter of 600 mm
- Forms zig-zag point connections between bags on one side while leaving the other side open
- Uses photoelectric automatic tracking for precise web alignment during forming
- Microcomputer length setting allows accurate bag length control
- Automatic counting and high-limit stopping prevent overproduction and roll waste
- High compensation accuracy ensures consistent bag formation and minimal error
- Heat sealing unit creates strong, reliable seals on single-layer poly film
- Pneumatic cutting system ensures clean, consistent bag separation
Specifications
| Machine model | PRE-600 |
|---|---|
| Max bag width | 550 mm |
| Max bag length | 1000 mm |
| Max unwinding diameter | 600 mm (can be special design) |
| Max rewinding diameter | 400 mm (can be special design) |
| Max production speed | 30-150 pcs/min |
| Unwinding core size | 3 inch (76 mm) |
| Rewinding core size | 3 inch (76 mm) |
| Film thickness | 0.008-0.15 mm (single layer) |
| Electric power | 12 kW |
| Overall dimensions | 5800 x 1200 x 1600 mm (L x W x H) |
| Machine weight | 2000 kg |
How The Machine Runs
Materials
- Single-layer poly film from 0.008 to 0.15 mm thickness
- Film reels with 3 inch (76 mm) cores
- Optional film with anti-static or print layers (not specified in facts)
Quality Control
- Photoelectric tracking system maintains web alignment to prevent misfeeds
- Automatic counting and high-limit stopping ensure consistent roll lengths
- Heat seal strength is verified during test runs with customer film
- Machine is tested with customer film before shipment to confirm bag formation
Customisation
- Unwinding and rewinding diameters can be specially designed for larger reels
- Core size can be adjusted from 3 inch to other sizes on request
- Film thickness range can be adapted for different material types
- Control system can be modified for different length settings or counting logic
Certifications
- ISO9001:2000 certificate obtained in 2005
- CE certificate obtained in 2006
How It Compares
| Buying pre-opened bags from a third-party supplier | Converting in house removes the supplier margin but requires inventory of poly film and machine investment |
|---|---|
| Manual bagging with a handheld cutter | Automated production is faster and more consistent, reducing operator fatigue and errors |
| A machine that makes pre-opened bags with full side seals | Zig-zag folding allows easier unfolding and better feeding on autobaggers, though it may require more precise film tension control |
Running It On Your Floor
- Ensure the poly film reel is loaded onto the 3 inch core and secured on the unwinding stand
- Set the desired bag length on the microcomputer control panel before starting
- Start at the lowest speed and gradually increase while monitoring the web tracking
- Check the first few bags for correct zig-zag formation and seal integrity
- Clean the forming die and heat seal bars regularly to prevent film residue buildup
Fanfold Pre-opened Poly Bag Making Machine with Zig-zag Folding FAQ
What film thickness can the machine handle
It processes single-layer poly film from 0.008 to 0.15 mm thickness.
How fast does the machine run
Production speed is adjustable from 30 to 150 bags per minute depending on film type and length.
What core size does it use for unwinding and rewinding
Standard is 3 inch (76 mm) for both unwinding and rewinding; other sizes can be designed.
Can it make bags longer than 1000 mm
Maximum bag length is 1000 mm; longer lengths require a custom machine design.
What power supply does it require
The machine requires 12 kW of electric power; voltage and frequency can be built to customer specification.
Is the machine tested before shipping
Yes, the machine is test run with customer film before shipment to verify bag formation and control functions.
Do you hold quality certificates
Wenzhou Snda Machinery holds an ISO9001:2000 certificate obtained in 2005 and a CE certificate obtained in 2006.
Machines Often Bought With It
2 Lines Pre-opened Bag On-a-roll Making Machine
The PRE-600 converts a single wide roll of poly film into two parallel rolls of pre-opened bags in a continuous process.
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Model 450 Packing Machine
The Model 450 Packing Machine automatically feeds pre-opened PE bags from a roll, sets the bag, and seals it in one cont.
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Model 550 Packing Machine with computer and printer
The Model 550 Packing Machine converts pre-opened PE bags on a roll into sealed, labelled bags at speeds up to 1800 bags.
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Multi-Lane Pre-opened Bag Making Machine
The PRE-600 converts a single wide roll of poly film into 1 to 4 finished pre-opened bags on a roll in one process.
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Guides On This Material
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