Food Paper Bag Making Machine

The industrial food paper bag making machine converts pre-printed or plain paper rolls into finished flat or square-bottom bags in a single inline pass. Engineered for packaging plants supplying bakeries, quick-service restaurants (QSR), and retail grocery sectors, the system integrates unwinding, tension control, tube forming, bottom tucking, pasting, and counting.

Built on a heavy-gauge steel frame to eliminate vibration at operating speeds up to 300 bags per minute, the machine accommodates food-grade kraft paper ranging from 45 to 150 GSM. Modular design configurations allow integration with inline flexographic printing units and twisted/flat handle-making modules.

Constant Tension Web Control: Closed-loop tension system utilizes pneumatic brake feedback and an ultrasonic sensor to maintain stable web feed, preventing wrinkle formation on thin kraft paper (45 GSM).

Servo-Driven Bottom Formation: Precision electronic cam profiles synchronize cylinder movement, bottom plate insertion, and cross-cutting to eliminate misaligned bottom tucks during high-speed acceleration.

Intelligent PLC & HMI Interface: Touchscreen terminal stores up to 50 job recipes, reducing mechanical size-changeover time to under 35 minutes. Real-time diagnostics monitor servo tracking and photoelectric eye registration.

Food-Grade Material Handling: Product-contact zones utilize SUS304 stainless steel and food-grade non-stick coatings, meeting FDA and EU food contact compliance standards for paper converting equipment.

Pneumatic Rejection Gate: Integrated optical sensors detect unglued seams, double sheets, or missing bottoms, automatically diverting defective bags without halting production lines.

Bakery & Confectionery: Grease-resistant kraft bags for artisan bread, pastries, and loose confectionery items.

Quick-Service Restaurants (QSR): Block-bottom takeaway bags with side gussets for meal boxes, burgers, and fried food delivery.

Retail & Grocery: Standard flat and satchel bags for pharmacies, bulk foods, and dry goods packaging.

Industrial & Agricultural: Multi-wall or heavy-duty paper sacks for flour, seeds, and charcoal packaging.

Inline Handle Unit: Integrates flat or twisted paper handle pasting modules prior to tube formation for retail carrier bag production.

Flexo Printing Integration: 2-to-6 color water-based flexographic printing stations mounted upstream for synchronized inline printing and cutting.

Perforation Station: Rotary mechanical or thermal perforation wheels added for easy-tear open features on food delivery bags.

Electrical Compliance: Control cabinets built to CE, UL, or CSA standards utilizing Schneider, Siemens, and SMC industrial automation components.

Machining Precision: Main frames and wall panels are machined on floor-type CNC boring and milling centers in a single setup to maintain parallelism within 0.02 mm, minimizing mechanical wear and noise at top operating speeds.

Component Traceability: Critical drive shafts utilize 40Cr alloy steel, subjected to high-frequency quenching and precision grinding. Gearboxes are hobbed internally and verified via coordinate measuring machines (CMM).

Factory Acceptance Testing (FAT): Every machine undergoes a mandatory 72-hour continuous dry run and a 12-hour live material test using client-specified paper rolls to verify speed stability, gluing uniformity, and dimensional tolerance before crating.

Surface Treatment: Structural steel components undergo shot-blasting, anti-rust epoxy primer application, and dual polyurethane baking enamel to resist corrosion in high-humidity packaging plants.

Documentation Package: Supplied with complete mechanical assembly drawings, electrical schematics (EPLAN format), PLC source code lists, and wear-part identification catalogs.

Commissioning Services: On-site installation, mechanical leveling, and operator training conducted by factory-certified service engineers. Remote virtual commissioning support is available upon request.

Spare Parts Inventory: Standard replacement components-including gripper fingers, cutting knives, glue nozzles, and proximity sensors-are stocked in regional distribution hubs for 48-hour dispatch.

Export Preparation: Machines are wrapped in VCI (Volatile Corrosion Inhibitor) film, sealed in vacuum-packed moisture-barrier bags, and secured with desiccant packs inside ISPM 15 compliant heat-treated wooden crates.

Container Loading: Engineered for 40-foot High Cube (40'HC) open-top or flat-rack container transport, with structural lifting points and center-of-gravity markings clearly stamped on external panels.

To receive a detailed quotation tailored to your production requirements, please provide the following technical parameters:

• Target bag style (Flat bottom, square bottom, with or without handles)
• Finished bag dimensions (Width, Length, Gusset)
• Paper weight range (GSM) and stock type (Kraft, greaseproof, recycled)
• Required production output or shift volume
• Destination port for shipping calculation

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