Corrugated cardboard production line is the industrial system used to manufacture corrugated cardboard—the fundamental material for the global packaging industry. Its primary purpose is to continuously produce flat, rigid flute cardboard from paper rolls, which is then converted into packaging solutions.
Main Applications:
1. Shipping & Transport Packaging
The primary use is producing corrugated shipping cartons (regular slotted containers, RSCs). These are the "brown boxes" used globally for e-commerce, logistics, and industrial shipping, valued for their strength, lightweight nature, and stackability.
2. Consumer Goods Packaging
The line produces high-quality printed boxes for retail packaging, including:
· Food & beverage cartons (pizza boxes, cereal boxes, beverage trays)
· Electronics packaging
· Household product boxes
· Cosmetic and luxury goods packaging
3. Protective Packaging
Corrugated cardboard is converted into:
· Die-cut inserts and dividers for product separation
· Edge protectors and corner posts for palletized goods
· Cushioning materials as a sustainable alternative to foam
4. Display & Point-of-Sale (POS) Materials
The line manufactures corrugated displays used in retail environments, including:
· Floor-standing product displays
· Countertop units
· Shelf-ready packaging (SRP) that converts into a display
5. Industrial & Heavy-Duty Applications
By producing double-wall (two flutes) or triple-wall cardboard, the line serves:
· Heavy machinery packaging
· Automotive parts shipping
· Furniture packaging
· Export crates requiring high stacking strength
6. Specialized & Sustainable Products
Modern corrugators produce:
· Water-resistant board for cold chain logistics
· Flame-retardant board for specific industries
· Molded fiber alternatives using recycled content
· E-commerce mailers with self-locking features
Key Advantage:
The corrugated cardboard production line enables mass production with customizable specifications—flute types (A, B, C, E, F), paper grades, and cardboard constructions—allowing manufacturers to produce packaging tailored to specific weight, protection, and printing requirements.
Corrugated cardboard production lines are primarily classified based on their degree of automation and production speed; they consist of two main sections: the "wet part" and the "dry part."
I. Classification
Based on design speed and automation level, they are typically categorized into three types:
· Low-Speed / Simple Lines: Speeds of ≤100 meters/minute. These typically feature a single-facer unit paired with manual paper splicing. They require low capital investment and are suitable for small-batch production and lightweight paper grades, though they are heavily reliant on manual labor.
· Medium-Speed / Economic Lines: Speeds ranging from 100 to 200 meters/minute. These are equipped with automatic paper splicers and PLC control systems. Offering excellent cost-effectiveness, this is currently the most widely adopted type of production line in the domestic market.
· High-Speed / Fully Automated Lines: Speeds of ≥200 meters/minute, potentially reaching over 400 meters/minute. These systems feature full computer control integrated with a production management system. Boasting an extremely high degree of automation, they are ideal for high-volume, high-quality production, though they require a significantly larger capital investment.
II. Components
One complete corrugated cardboard production line consists of the "wet part" (covering the process from raw paper feeding to bonding and forming) and the "dry part" (covering the process from setting/curing to cutting and stacking).
1. The wet part: Responsible for the forming and bonding of the corrugated cardboard.
· Mill Roll Hold Stand: Supports the paper rolls and controls web tension; high-end models feature automatic splicing capabilities, allowing for roll changes without stopping the production line.
· Pre-heater/Pre-conditioner: Regulates the temperature, moisture content, and tension of the raw paper web, thereby controlling the flatness of the finished cardboard.
· Single-Facer: The core component of the production line; it bonds the fluting paper (medium) to the liner paper to create "single-face corrugated cardboard."
· Bridge Conveyor: Stores the single-face corrugated board and, through tension control, ensures stable alignment as the board enters the dry end.
· Glue Machine: Applies adhesive to the flute tips of the single-face board to facilitate its lamination with the outer liner (face paper).
· Double-Facer (Hot Plate/Drying Section): The critical section for heating and setting the board structure. It utilizes steam-heated hot plates to cure the adhesive, resulting in a flat, finished corrugated cardboard sheet.
2. The dry part: Responsible for the precise cutting and stacking of the cardboard.
· Slitter-Scorer machine: Performs longitudinal trimming and slitting of the cardboard according to order specifications, while simultaneously creating the score lines required for subsequent folding.
· Cut-off NC cutter: Precisely cuts the continuous cardboard web into individual sheets of the specified length. High-speed lines are typically equipped with helical knives, offering high precision and low noise levels.
· Automatic Stacker: Automatically counts, stacks, and discharges the cut cardboard. High-end models feature an offset stacking function, facilitating subsequent packaging.
Old corrugated cardboard carton box recycling machine
