Customizable PU Sandwich Panel Production Line For Cold Storage Panels

The customizable pu sandwich panel production line for cold storage panels is a modern insulation board production system designed for low-temperature environments such as cold chain logistics, food processing, and pharmaceutical storage. This production line adopts a continuous production process, which combines high-strength metal panels with polyurethane (PU) insulation core materials through automated equipment to form sandwich panels with excellent insulation performance.

sandwich panel line

Compared with traditional production lines, cold storage panel production lines have the following significant characteristics:

• Adopting high-density polyurethane formula to ensure insulation performance in low-temperature environments

• Equipped with a precision temperature control system to ensure the stability of the foaming process

• Enhanced design meets the high-strength requirements of refrigerated environments

• Special anti condensation treatment process

The main components of the polyurethane sandwich panel production line for cold storage panels

• Loading system
  Metal panel processing unit:
  Double metal coil unwinding machine (capable of simultaneously processing inner and outer panels)
  Automatic correction device (accuracy ± 0.5mm)
  Pre treatment cleaning system (degreasing, chemical conversion treatment)
  Drying equipment (temperature controllable range 50-120 ℃)
  Polyurethane raw material system:
  Thermostatic storage tank (separate storage of isocyanates and polyols)
  Raw material measurement system (measurement accuracy ± 0.5%)
  High pressure foaming machine (working pressure 150-250bar)

• Core production system
  Composite foaming area:
  Double track continuous foaming machine (length 30-60 meters)
  Partition temperature control system (5-8 temperature zones)
  Foam thickness adjustment device (adjustable from 50-200mm)
  Online density monitoring device
  Maturation area:
  Segmented maturation channel
  Temperature uniformity control system (± 2 ℃)
  Exhaust gas collection and treatment device

• Forming processing system
  Sheet metal forming unit:
  Automatic fixed length cutting (accuracy ± 1mm)
  Edge processing equipment (milling, edge sealing)
  Surface protective film laminating machine
  Automatic stacking system (with a carrying capacity of ≥ 5 tons)
  Quality inspection system:
  Infrared thickness detection
  Online testing of thermal conductivity coefficient
  Adhesive strength sampling device
  Visual inspection of surface quality

Production process flow

• Panel pretreatment: metal coil unwinding → cleaning → drying → preheating (40-60 ℃)

• Preparation for foaming: preheating of raw materials → precise measurement → high-pressure mixing (mixing head speed ≥ 6000rpm)

• Continuous foaming: double-sided panel positioning → polyurethane injection → track pressure molding (pressure 0.5-2 bar)

• Maturation and shaping: gradient cooling (60 ℃ → room temperature) → molecular structure stabilization

• Post processing: fixed length cutting → edge sealing → surface protection → quality inspection → automatic stacking

Expansion of application areas

In addition to traditional refrigeration applications, modern polyurethane sandwich panel production lines can also produce materials for:

• Medical cold chain transportation vehicle box

• Partition of frozen food processing workshop

• Construction of laboratory constant temperature environment

• Special refrigerated container

• Cleanroom insulation enclosure

The specialized pu sandwich panel line for cold storage panels is developing towards high efficiency, intelligence, and environmental friendliness, providing better insulation solutions for the cold chain logistics industry. With technological advancements, future production lines will achieve higher levels of automation and more precise process control to meet the growing demand of the cold chain market.