Zig-zag Folding Pre-opened Bag Making Machine
The PRE-600 converts a reel of poly film into pre-opened bags on a roll using a zig-zag folding method. The machine handles bag widths up to 550 mm and lengths up to 1000 mm, producing 30 to 150 bags per minute. It features two perforation lines—one for pre-opening and one for easy opening after sealing—allowing the bag to be opened without tearing. This enables e-commerce and fulfilment operations to feed bags directly into an autobagger without manual intervention.
- Replaces manual bagging with pre-opened bags fed directly to an autobagger, reducing labour and increasing throughput
- Two perforation lines allow for pre-opening and easy opening after sealing, improving packing speed and user experience
- Adjustable pre-cut perforation width (50%–80% open) maintains seal integrity while enabling easy opening
- Automatic counting and length setting ensure consistent bag length and reduce waste
- Single-pass conversion of poly film into finished bags on a roll eliminates the need to buy pre-opened bags from third parties
Why Buyers Choose It
- Manual bagging is slow and inconsistent compared to automated feeding of pre-opened bags
- Pre-opened bags from external suppliers carry a markup and may have variable lead times
- Bags that do not open easily after sealing cause delays and operator frustration
- Inconsistent bag length leads to misfeeds in autobaggers and machine downtime
- Lack of control over perforation design limits flexibility in bag opening performance
Who Runs This Machine
- E-commerce fulfilment and 3PL operators running autobag lines that require pre-opened bags
- Poly bag makers supplying pre-opened bags on a roll to automated packaging systems
- Packagers in the pet, consumer goods, and retail sectors switching from manual to automated bagging
- Converters adding value to poly film by turning it into pre-opened bags on a roll
Where This Machine Is Used
- E-commerce fulfilment centres automating bagging lines with pre-opened bags on a roll
- 3PL operators integrating the PRE-600 into an autobag system for high-volume order processing
- Poly bag makers expanding their product range to include pre-opened bags for roll-fed packaging
- Consumer goods packers replacing plastic bags with paper or film bags that open easily after sealing
- Packaging converters adding pre-opened bag capacity to their existing film converting line
Features And Specifications
Technical features
- Zig-zag folding mechanism forms pre-opened bags with consistent geometry
- Two perforation lines: one for pre-opening and one for easy opening after sealing
- Adjustable pre-cut perforation width (50%–80% open) to balance seal strength and ease of opening
- Photoelectric automatic tracking with microcomputer length setting for accurate bag length
- Automatic counting and high-limit stopping when the set value is reached
- High compensation accuracy ensures minimal error in bag length and positioning
- Magnetic powder brake and clutch maintain consistent web tension during forming
- Pneumatic cylinder controls the folding and sealing units for reliable operation
Specifications
| Machine model | PRE-600 |
|---|---|
| Max bag width | 550 mm |
| Max bag length | 1000 mm |
| Max unwinding diameter | 600 mm (special design available) |
| Max rewinding diameter | 400 mm (special design available) |
| Max bag making speed | 30–150 pcs/min |
| Unwinding paper core | 3 inch (76 mm) |
| Rewinding paper core | 3 inch (76 mm) |
| Film thickness (single layer) | 0.008–0.15 mm |
| 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
- Poly film reels from 0.008 to 0.15 mm thickness
- Single layer film suitable for packaging consumer goods, pet products, and retail items
- Optional film with heat seal properties for consistent sealing performance
Quality Control
- Photoelectric sensor ensures consistent bag length and alignment across the web
- Automatic counting verifies the number of bags produced per roll
- Magnetic powder brake maintains stable tension to prevent wrinkling or misalignment
- Perforation blade adjustment is checked for consistency before shipment
- Machine is test run with customer film before delivery to verify performance
Customisation
- Perforation blade width can be adjusted to produce 50%–80% open pre-cut lines
- Special designs available for unwinding and rewinding diameters beyond standard limits
- Power supply can be built to match the voltage and frequency of the destination country
- Folding pattern and bag size can be adjusted within the machine's rated capacity
- Additional sealing or perforation lines can be added based on specific bag design needs
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 film and machine investment |
|---|---|
| Manual bagging with standard bags | Pre-opened bags on a roll feed directly into an autobagger, reducing labour and increasing speed |
| Single perforation line machines | This machine includes two lines—one for pre-opening and one for easy opening—improving usability after sealing |
Running It On Your Floor
- Load a poly film reel up to 600 mm diameter onto the 3 inch air shaft before starting
- Set the target bag length and count on the microcomputer control panel
- Start at the lowest speed and gradually increase while monitoring the folding and sealing
- Check the first few bags for correct perforation and sealing quality before full production
- Keep the perforation blades clean and free of film residue to maintain consistent cutting
Zig-zag Folding Pre-opened Bag Making Machine FAQ
What film thickness can the machine handle
It is designed for single layer poly film from 0.008 to 0.15 mm thick.
How fast does the machine produce bags
The maximum speed is 30 to 150 bags per minute, depending on film thickness and bag size.
Can the pre-cut perforation be adjusted
Yes, the pre-cut line can be set to 50%–80% open width to balance seal strength and ease of opening.
What power supply do you build it for
Standard is 12 kW, and we can build to the voltage and frequency of your country on request.
What is the footprint and weight for installation
The machine is 5800 x 1200 x 1600 mm and weighs 2000 kg, so plan for a level floor and forklift access.
Can it make bags with only one perforation line
Yes, the second perforation line can be disabled if only pre-opening is required.
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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The PRE-600 converts a reel of single-layer poly film into fanfold pre-opened bags on a roll with zig-zag point connecti.
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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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Guides On This Material
Quote The Zig-zag Folding Pre-opened Bag Making Machine
Send your paper or film specification and target output. We will confirm the model, the lead position and the price.