Automatic Paper Bag Making Machine

Automatic Paper Bag Making Machines convert paper rolls or sheets into finished square-bottom or V-bottom bags in a continuous inline workflow.
Engineered for mid-to-large scale packaging converters, this machinery integrates unwinding, web tension control, tube forming, cut-off, bottom creasing, bottom pasting, and final collection. It eliminates manual folding bottlenecks, delivering stable output speeds for retail, food service, and industrial packaging applications. Built on a rigid steel chassis with closed-loop servo control, the system minimizes waste ratios during size changeovers and maintains dimension tolerances within +/-0.5 mm at operational speeds up to 200 bags/min. 

Closed-Loop Tension Control: Pneumatic brake systems paired with ultrasonic edge-position sensors (EPC) maintain constant web tension, preventing web wandering and wrinkles at high operational speeds.

Inline Servo Bottom Pasting: Independent servo-driven application units apply cold glue or hot melt precisely to the bottom patch, avoiding glue overflow and weak seals under load.

Touchscreen HMI & PLC Control: Mitsubishi/Siemens PLC architectures coordinate multi-axis motion control. Operators store up to 50 production recipes for rapid metric recall.

Pneumatic Lift Roll Loading: Hydraulic or pneumatic shaftless reel stands allow single-operator loading of heavy paper rolls weighing up to 1,500 kg.

Automatic Fault Diagnostics: Real-time sensor monitoring tracks paper jams, low glue levels, and web breaks, triggering instant emergency stops to protect cutting dies and forming drums.

Retail & Apparel: SOS flat-bottom bags and handled luxury shopping bags for clothing, cosmetics, and department stores.

Food & Beverage: SOS grocery bags, bakery bags, and take-out bags compliant with food-contact paper standards.

Industrial & E-Commerce: Padded or reinforced mailer bags and courier paper envelopes utilizing high-GSM kraft paper.

Manufacturing operations require machine adaptation to specific regional raw materials and bag specifications. Available engineering modifications include:

Handle Integration Modules: Inline twisted or flat handle pasting units for luxury retail configurations.

Flexographic Printing Units: 2-to-4 color inline water-based flexo printing stations prior to tube forming.

Window Patching Attachment: Transparent OPP/CPP film application for visual product display windows.

Electrical Compliance: Customized control cabinet wiring matching UL/CSA standards or CE safety interlocks.

Production takes place in a 25,000 m² heavy-machining facility utilizing CNC gantry milling centers for frame face-milling, ensuring bed parallelism within 0.02 mm.

Component Machining: Main wall panels are annealed to relieve internal stress prior to precision boring, preventing thermal deformation during continuous factory operation.

Dimensional Inspection: Gearboxes and drive shafts undergo three-coordinate measuring machine (CMM) checks to maintain zero backlash in high-speed cam drives.

Factory Acceptance Testing (FAT): Every machine undergoes a 72-hour continuous dry-run test followed by a 4-hour live trial using client-supplied paper stock and glue samples before crating.

Traceability: Critical electrical actuators, bearings, and servo drives carry serial numbers logged into our internal quality management records.

Commissioning: On-site installation and calibration performed by factory-certified mechanical and electrical engineers within 7 to 14 working days of machine arrival.

Operator Training: Structured 5-day training program covering mechanical adjustments, recipe programming, preventative maintenance, and troubleshooting.

Spare Parts Inventory: Core wear parts-including rubber rollers, cutting blades, pneumatic valves, and photoelectric sensors-are stocked in regional distribution hubs for 48-hour dispatch.

Remote Support: Secure VPN-enabled diagnostic gateways allow our engineering team to inspect PLC parameters and resolve software faults remotely.

Anti-Corrosion Treatment: Internal machined surfaces are coated with anti-rust oil and wrapped in VCI (Volatile Corrosion Inhibiting) moisture barrier film.

Securing & Crating: Machines are bolted to fumigated heavy-timber skids, anchored with steel wire ropes, and enclosed in sealed plywood export crates.

Logistics Coordination: FOB, CIF, or DDP shipping terms coordinated via standard 40-foot High Cube (40'HQ) open-top containers or flat-rack vessels depending on machine configuration.

To evaluate machine compatibility with your production requirements, submit the following technical parameters:

• Target bag dimensions (Width x Length x Gusset)
• Paper type and GSM range (60 to 180 g/m²)
• Handle type requirement (Flat, twisted, punch-out, or none)
• Estimated monthly output volume
• Destination port

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