Square Paper Bucket Making Machine

The Square Paper Bucket Making Machine is an automated forming system designed to convert pre-printed and die-cut paper blanks into leak-proof square and rectangular paper containers. Utilizing an indexing turret mechanism combined with precision heating and ultrasonic welding, the machine automates bottom feeding, side-seam sealing, bottom knurling, and top rim-curling in a continuous cycle. It targets packaging plants producing takeaway containers for hot soup, fried chicken, salads, and fast food. 

Dual Heating & Ultrasonic System: Combines Swiss Leister hot-air welding for side seams with ultrasonic generators for heavy-weight PE/PLA bottom paper, ensuring zero leakage at high speeds.

PLC Motion Control: Driven by an industrial PLC and servo-controlled bottom paper feeding system, preventing material waste and ensuring precise blank registration.

Closed-Loop Lubrication: Automated oil-circulating lubrication system delivers continuous oil supply to main mechanical gears and cams, reducing wear and extending operational lifespan.

Quick-Change Tooling: Modular mold design allows operators to switch between different bucket sizes within 45 minutes using standard alignment pins.

Vision Inspection Integration: Optional CCD camera integration detects misaligned seams, unbonded bottoms, or deformed rims before packaging discharge.

Takeout Food Packaging: Production of square soup buckets, noodle boxes, and rice containers.

Fast Food & Snack Packaging: Manufacturing grease-resistant buckets for fried chicken, French fries, and popcorn.

Ready-to-Eat & Retail: Forming stackable paper bowls for supermarket deli sections and frozen meal preps.

Mold Dimensions: Custom-engineered square, rectangular, or octagonal forming molds based on specific top/bottom dimensions and wall angles.

Coating Compatibility: Configurable sealing temperatures and pressure profiles optimized for water-based barrier coatings, PLA, or traditional PE liners.

Integration Options: Modular inline options for automatic counting stackers, silicone oil spraying units, and shrink-wrapping conveyors.

Built in our 15,000-square-meter machining facility utilizing high-precision CNC vertical machining centers to maintain frame tolerance within 0.02 mm.

Machining & Assembly: Main chassis plates are annealed to eliminate residual stress, preventing structural warping during continuous multi-shift operation. Drive cams are induction-hardened to HRC 55-58.

Quality Verification: Every machine undergoes a 72-hour continuous dry-run test followed by a 12-hour live production test using client-supplied paper stock.

Inspection Standards: Electrical components comply with CE standards (Schneider, Siemens, Omron). Leakage tests are performed on sampled buckets using dye-penetrant testing under 24-hour water-fill conditions.

Documentation: Comprehensive English technical manuals, electrical schematics, PLC source code backup, and hydraulic/pneumatic diagrams provided upon delivery.

Commissioning: Remote video technical support included standard. On-site engineer dispatch available for installation, mechanical calibration, and operator training.

Spare Parts Availability: Critical wear parts (heating elements, ultrasonic horns, forming knives, proximity sensors) stocked in standard inventories for dispatch within 48 hours.

Export Packaging: Wrapped in moisture-resistant PE stretch film, secured inside fumigation-free wooden crates with desiccants to prevent sea-corrosion during transit.

Shipping Terms: FOB, CIF, or EXW from major export ports (Shanghai/Ningbo). Standard production lead time: 30 to 45 days from receipt of deposit.

To receive a detailed quotation including freight estimates, production output analysis, and custom mold feasibility reports, please provide your target bucket specifications (top dimensions, bottom dimensions, height, and paper GSM) via our inquiry form below.