PU Sandwich Panel Production Line With Rock Wool-PU Composite Core

The rock wool polyurethane composite core sandwich panel production line is an advanced equipment for the production of modern building enclosure system materials. It combines the excellent fire resistance of rock wool and the excellent insulation properties of polyurethane, and produces sandwich panels that are widely used in industrial plants, cold storage, purification workshops and other construction fields.

sandwich panel line

The production line for rock wool polyurethane composite core sandwich panels adopts a continuous production method with high automation. The annual production capacity can reach 800000 to 1.5 million square meters, depending on equipment configuration and production speed. The overall length of the line is usually between 80-120 meters, requiring approximately 2000-3000 square meters of factory space.

The main equipment components of the pu sandwich panel production line with rock wool-pu composite core

• Loading system
  Metal plate uncoiler: dual station design, capable of loading two rolls of color steel plates simultaneously, automatically switching to uninterrupted feeding
  Leveling machine: 7-9 roller structure, eliminates steel plate curling stress, ensures flat surface
  Shear welding machine: automatically cuts the head and tail of the plate and performs laser welding to achieve continuous production
  Storage rack: Buffer storage to ensure that coil replacement does not affect subsequent processes

• Forming system
  Compression molding machine: Multi pass progressive molding, equipped with precision guiding devices, capable of producing various types of upper and lower panels
  Rock wool conveying device: automatic weighing and measuring, precise control of rock wool thickness and density
  Polyurethane foaming system:
  High pressure foaming machine: measurement accuracy ± 1.5%, automatic cleaning of mixing head
  Temperature control system: The raw material temperature is controlled within a range of ± 1 ℃
  Adhesive injection platform: double-sided adhesive injection to ensure sufficient bonding between polyurethane and rock wool

• Composite curing system
  Double track laminating machine: adjustable pressure (0.1-0.3MPa), segmented heating (40-60 ℃), promotes polyurethane curing
  Hot air circulation system: temperature uniformity ± 2 ℃, accelerating the curing process
  Cooling section: forced air cooling to ensure the shaping of the board

• Cutting and stacking system
  Flying saw cutting machine: servo control, cutting accuracy ± 1mm, diagonal error ≤ 2mm
  Automatic stacker crane: pneumatic suction cup or robotic arm grabbing, automatically stacking according to the set quantity
  Waste recycling device: collects scraps and automatically crushes and recycles them

Production process flow of pu sandwich panel line with rock wool-pu composite core

• Pre treatment of metal panels: uncoiling → leveling → cleaning → preheating (50-60 ℃)

• Molding process:
  Upper panel molding → spray glue (PUR hot melt adhesive)
  Rock wool automatic paving (density 120-150kg/m ³)
  Lower panel molding → double-sided injection of polyurethane (density 40-45kg/m ³)

• Composite curing:
  Preliminary compression (pressure 0.15-0.2MPa)
  Heat curing (temperature 50-55 ℃, time 3-5 minutes)
  Cooling and shaping

• Post processing:
  Cut to length
  Edge trimming
  Quality inspection (thickness, flatness, bonding strength)
  Automatic stacking packaging

Advantages of rock wool pu composite core sandwich panel production line

• Energy conservation and environmental protection:
  The utilization rate of thermal energy recovery is over 65%
  VOC emissions comply with GB16297 standard
  Waste recycling rate>95%

• High degree of intelligence:
  PLC fully automatic control, formula can store more than 100 sets
  Remote monitoring and diagnostic function
  Automatic recording and analysis of production data

• Superior product performance:
  Composite structure solves the fire resistance problem of traditional polyurethane board
  Increase compressive strength by more than 30%
  Extended service life to 25-30 years

Maintenance Specification for Rock Wool Polyurethane Composite Core Sandwich Panel Manufacturing Line

• Daily maintenance:
  Clean the foam mixing head to prevent blockage
  Check the oil level and pressure of the hydraulic system
  Lubricate all transmission components

• Monthly maintenance:
  Calibration and measurement system accuracy
  Check the efficiency of the heating element
  Testing the reliability of safety devices

• Annual major overhaul:
  Replace worn forming rollers
  Thoroughly inspect the electrical system
  Equipment accuracy restoration adjustment