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Product Overview

The Automatic Roll-Fed Kraft Paper Bag Machine integrates unwinding, web guiding, side-gluing, tube forming, cutting, and bottom pasting into a continuous inline workflow. Engineered for industrial packaging converters and high-volume print shops, it combines multi-axis servo motion control with robust mechanical architecture to maintain dimensional stability at production speeds up to 250 bags/min. Designed for unprinted and pre-printed kraft paper webs ranging from 50 to 180 GSM, the system utilizes modular forming plates to minimize format changeover downtime for automated retail and food-service packaging lines.

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.
Square Bottom Paper Bag Making Machine
The industrial square-bottom paper bag making machine forms paper bags continuously from roll stock. It integrates reel unwinding, web tension control, tube forming, bottom cutting, gluing, bottom
Twisted Handle Paper Bag Making Machine
The Twisted Handle Paper Bag Making Machine is an automated inline conversion system engineered to produce square-bottom paper bags with integrated twisted paper handles from roll stock.
Flat Handle Paper Bag Making Machine
The Flat Handle Paper Bag Making Machine is engineered for inline roll-fed production of square-bottom paper bags with attached flat paper handles.
High-Speed Paper Bag Making Machine
The high-speed paper bag making machine forms, glues, and bottoms paper rolls or sheets into finished packaging at speeds up to 300 bags/min.
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.

Technical Specifications

Performance Parameter	Machine Specification
Bag Width Range	80 - 540 mm
Bag Length Range	190 - 700 mm
Gusset Depth	20 - 200 mm
Paper Thickness (GSM)	50 - 180 GSM
Max. Production Speed	Up to 250 bags/min (format and GSM dependent)
Max. Unwind Reel Diameter	1400 mm
Total Connected Power	18 - 35 kW (3-Phase, 380V, 50/60Hz)
Compressed Air Requirement	0.6 MPa, 150 L/min
Machine Weight	8,500 - 14,000 kg
Overall Dimensions (L x W x H)	11,500 x 3,200 x 2,400 mm

Key Features

Closed-Loop Tension Control: Unwind stand features integrated pneumatic brakes and load cell feedback to stabilize web tension, eliminating wrinkle formation and edge wandering during high-speed runs.

Precision Rotary Cutting Cylinder: Hardened alloy steel cutter assembly engineered for burr-free, clean edge shearing across varying paper grammages without rapid blade wear.

Dual Gluing System Integration: Accommodates Nordson hot-melt adhesive applicators for instant bottom bonding alongside cold-glue wheel setups for reliable side-seam application.

Multi-Axis Motion Platform: Mitsubishi/Siemens PLC and servo architecture govern batch counting, speed regulation, real-time error diagnostics, and 100+ recipe memory presets.

High-Accuracy Print Registration: SICK color mark sensor tracks pre-printed web graphics, maintaining cut-to-print synchronization within +/- 0.5 mm at peak output.

Applications

Retail & Fashion Boutiques

Structural square-bottom carrier bags equipped with twisted or flat glued-on paper handles.

Food Service & Takeaway

SOS (Self-Opening Square) bags and satchels utilized by bakeries, quick-service restaurants, and grocery delivery chains.

E-Commerce Fulfillment

Durable paper mailer bags featuring integrated peel-and-seal tape strips and side gussets for parcel logistics.

Customization Options

Inline Handle Unit

Optional modules for automated twisted-handle or flat-handle patch application prior to tube formation.

Inline Flexographic Printing

2-to-4 color flexo printing stations allowing single-pass brand printing prior to bag fabrication.

Window Patching Attachment

Integrated BOPP film applicator for transparent product visibility windows in food packaging.

Electrical Compliance

Control panels configured to UL/CSA standards for North America or CE safety directives for Europe, matching regional voltage requirements (220V, 380V, 480V).

Manufacturing & Quality Control

01/

In-House CNC Machining: Structural frames, side walls, and heavy-duty roller assemblies are machined on large-scale CNC floor boring centers to guarantee parallel alignment under heavy operational stress.

02/

Precision Thermal Treatment: Drive shafts, cams, and cutter blades undergo vacuum quenching and high-frequency induction hardening to achieve wear resistance of HRC 58-62.

03/

Dynamic Balancing: All high-speed rotating cylinders and rollers are individually balanced on ISO 1940-compliant rigs to suppress mechanical vibration at maximum operational RPM.

04/

Factory Acceptance Testing (FAT): Every unit undergoes an 8-hour continuous dry run followed by a live test using client-supplied paper stock to verify speed stability, adhesive placement, and electrical integrity prior to crating.

Installation & After-Sales Support

On-Site Commissioning: Mechanical leveling, electrical hookup, and operator training performed by factory-certified field service engineers.

Remote Diagnostic Gateway: Embedded secure Ethernet module within the PLC architecture enables remote software updates and real-time troubleshooting by technical support specialists.

Regional Spare Parts Inventory: Critical wear components (drive belts, cutter blades, dispensing nozzles, sensors) stocked in regional hubs for guaranteed dispatch within 48 hours.

Packaging & Delivery

Export-Grade Preservation

Machine surfaces coated with anti-corrosion VCI film, hermetically sealed inside vacuum barrier bags, and packed into ISPM 15-compliant fumigated wooden crates.

Container Loading Strategy

Engineered for secure 40-foot High Cube (40'HC) open-top or flat-rack container transport, stabilized via heavy-duty steel wire internal bracing.

FAQ

Q: What is the average format changeover time between different bag sizes?

A: Format changeovers take 30 to 60 minutes, utilizing tool-less modular forming plates and instant digital recipe recall via the touchscreen HMI terminal.

Q: What adhesive types are required for the dispensing units?

A: The machine supports standard water-based cold PVA adhesives for side seams and EVA-based hot melt pellets or blocks for high-speed bottom pasting.

Q: What are the fundamental facility requirements for installation?

A: A stable 3-phase electrical drop, a compressed air source supplying 0.6 MPa at 150 L/min, and a reinforced concrete factory floor with a minimum thickness of 150 mm to dampen operational harmonics.

Q: What is the standard warranty coverage?

A: A comprehensive 12-month mechanical and electrical warranty covers all non-consumable structural and motion components against manufacturing defects.

Request a Technical Quote

To evaluate machine compatibility and receive a formal quotation, please provide your production parameters to our application engineering team:
Target bag configurations (Flat, Satchel, Handle type)
Dimensional specs (Width, Length, Gusset depth)
Paper GSM range and anticipated monthly output volume
[Submit Technical RFQ / Contact Application Engineer]

As one of the leading paper bag making machine manufacturers and suppliers in China, we warmly welcome you to buy bulk high quality paper bag making machine in stock here and get free sample from our factory. All customized machines are with high quality and competitive price.

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