Multi-Layer Cardboard Production Line

Automatic Multi-Layer Cardboard Production Line
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The production of multi-layer cardboard involves a series of processes that transform raw materials into durable and high-quality packaging solutions. This particular 4-ply cardboard production line is designed to produce cardboard suitable for luxury packaging such as for tobacco, alcohol, and high-end gift boxes, as well as industrial composite boards. Our multi-layer cardboard production line can handle widths ranging from 1200 to 3000 mm, accommodating a variety of production needs.

The 4 ply cardboard production line includes various components such as a paper roll stand for securely holding large rolls of paper, an overhead bridge for smooth transport, an edge alignment machine to maintain precise alignment, a pre-heater to prepare the paper, a glue application machine for even adhesive application, a compression unit to press the layers together, a drying section to set the glue, a cooling section to stabilize the structure, a slitting machine for cutting widths, a cross-cutting machine for cutting lengths, and a stacking unit for easy handling and transport.

Specifications
  • Sheet width: 1200-3000mm
  • Design speed: 80m/min
  • Working speed: 40-60m/min
  • Working width: 1600mm
  • Cutting length: 500-9999mm
  • Feeding precision: ±1mm
  • Cardboard thickness: 3-4mm
  • Productivity: 3-4t/h
  • Production line length: 36m (customizable)
  • Motor: 380V, 50Hz, 3phase
  • Total power: approximately 120kW (actual power use 40-80kW)
  • Glue usage: 15-30g/m² per layer
Main Components
Component Quantity Configuration
Hydraulic Mill Roll Stand 4 sets Equipped with Ø300 mm tapered chucks and two-point pneumatic brakes; includes six trolley assemblies
Overhead Bridge 1 set Heavy-duty bridge with protective guardrails
4-Ply Edge Alignment Unit 1 set Chongqing Dongdeng ultrasonic web-guiding system for sensitive and accurate edge alignment
4-Ply Preheater 1 set Electrically heated, with a Ø320 mm heating roller
Coating Unit 1 set Fitted with a Ø215 mm roller, independent drive, and variable-frequency speed control
Pasting Unit 1 set Features a precision-ground, hard-chrome-plated Ø400 mm roller and a multi-start guide roller for balanced paper entry into the bonding section
Pressing and Forming Unit 1 set Six groups of electrically heated Ø156 mm pressing rollers with pneumatic pressure adjustment
Pulling and Slitting Unit 1 set Uses a Ø320 mm rubber pull roller and three groups of slitting knives, with manual correction for cutting-position deviations
NC Cut-Off Unit 1 set Spiral-knife cutting system with a Ø240 mm knife cylinder, servo and computer control, and automatic order changeover; cut length range: 500–9,999 mm
Stacking Unit 1 set Low-speed stacking with motorized lateral discharge, variable-frequency synchronized control, and automatic counting
Glue Preparation System 1 set Electrically prepares and recirculates adhesive