Pre-opened Bag On Roll Making Machine
The PRE-600 converts a reel of poly film into pre-opened bags on a roll in a single continuous process. The machine produces bags with a zigzag perforation on one side and a sealed bottom, allowing them to be fed automatically into an autobagger. This replaces manual bagging or the use of standard poly bags, reducing labour and improving throughput for high-volume packaging lines.
- Produces pre-opened bags on a roll that are compatible with autobaggers, titans, and sharp packing machines
- Reduces labour costs by eliminating manual bagging and hand feeding
- Adjustable speed from 30 to 150 pieces per minute allows matching to downstream line capacity
- Automatic photoelectric tracking and microcomputer length setting ensure consistent bag alignment
- Automatic counting and high-limit stopping prevent overproduction and reduce material waste
Why Buyers Choose It
- Manual bagging is slow and inconsistent compared to automated feeding of pre-opened bags
- Standard poly bags require manual opening and placement, increasing cycle time and labour cost
- Using off-the-shelf pre-opened bags from suppliers adds a margin and long lead times
- Inconsistent bag alignment causes jams and downtime in autobaggers
- Lack of pre-opened bags on a roll prevents integration with high-speed automated packaging lines
Who Runs This Machine
- E-commerce fulfilment and 3PL operators running autobag lines
- Poly bag makers supplying pre-opened bags on a roll to automated packaging systems
- Consumer goods and pet product packers using roll-fed bagging for consistent output
- Paper converters and slitting houses adding pre-opened bag capacity to their line
Where This Machine Is Used
- E-commerce fulfilment centres automating bagging for thousands of daily orders
- 3PL operators upgrading from manual bagging to roll-fed pre-opened bags
- Poly bag makers supplying pre-opened bags on a roll to autobagging lines
- Packers using pre-opened bags for consumer goods, pet products, and household items
- Manufacturers replacing standard poly bags with pre-opened versions for faster machine feeding
Features And Specifications
Technical features
- Single-sided pre-opened bag structure with zigzag perforation on one side and sealed bottom
- Photoelectric automatic tracking system ensures precise bag positioning
- Microcomputer length setting allows accurate control of bag size and spacing
- Automatic counting and high-limit stopping stop the machine at the set number of bags
- Automatic alarm triggers when the set count is reached
- Adjustable speed from 30 to 150 pcs/min for matching downstream line speed
- Pneumatic or mechanical tension control maintains film stability during processing
- Zigzag perforation pattern allows clean separation of individual bags
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 machine speed | 30-150 pcs/min |
| Unwinding core size | 3 inch (76 mm) |
| Rewinding core size | 3 inch (76 mm) |
| Film thickness range | 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
- Poly film reels with thickness from 0.008 to 0.15 mm
- Single-layer polyethylene or similar film suitable for heat sealing
- Optional film with printed or coloured layers for branding or identification
Quality Control
- Photoelectric sensor verifies bag position and triggers alignment correction
- Automatic counting ensures consistent roll lengths and prevents overproduction
- Heat seal strength tested during setup to ensure bag integrity
- Machine is test run with customer film before shipment to verify performance
Customisation
- Unwinding and rewinding core sizes can be customised beyond 3 inch (76 mm)
- Bag width and length can be adjusted within the machine's maximum limits
- Zigzag perforation pattern can be modified for different tear strength or separation ease
- Power supply can be built to match the voltage and frequency of the destination country
- Optional roll-to-sheet cutting unit can be added for downstream processing
Certifications
- ISO9001:2000 certificate obtained in 2005
- CE certificate obtained in 2006
How It Compares
| Buying pre-opened bags on a roll from a supplier | Converting in house removes the supplier margin and allows custom bag sizes, but requires inventory of film and machine investment |
|---|---|
| Manual bagging with standard poly bags | Automated pre-opened bag production reduces labour and increases speed, though it requires a machine and film input |
| Standard bag making machine without pre-opening | This machine produces bags with a pre-opened feature for automatic feeding; standard machines produce sealed bags that must be opened manually |
Running It On Your Floor
- Load the poly film reel onto the 3 inch inflatable air shaft with the correct direction
- Set the desired bag width and length using the microcomputer control panel
- Start at the lowest speed and gradually increase while monitoring the photoelectric tracking
- Check the first few bags for correct perforation and seal quality before full production
- Use the automatic count function to stop the machine at the required roll length
Pre-opened Bag On Roll 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.
How fast does it produce bags
The machine runs at 30 to 150 pieces per minute, depending on film type and settings.
Can the core size be changed
Standard core is 3 inch (76 mm), but custom sizes can be designed for unwinding and rewinding.
What power supply do you provide
Standard is 12 kW, and we can build to the voltage and frequency of your country on request.
What is the machine footprint and weight
The machine is 5800 x 1200 x 1600 mm and weighs 2000 kg, so plan for a level floor and forklift access.
Does it produce bags with a pre-opened feature
Yes, the machine produces single-sided pre-opened bags with zigzag perforation and sealed bottom for automatic feeding.
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
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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 Pre-opened Bag On Roll Making Machine
Send your paper or film specification and target output. We will confirm the model, the lead position and the price.