Thermal Insulation Polyurethane Sandwich Panel Production Line

The insulation polyurethane sandwich panel production line is an automated system used in the modern construction industry to produce high-efficiency and energy-saving building panels. This production line can continuously produce polyurethane sandwich panels with excellent thermal insulation performance, which are widely used in industrial plants, cold storage, commercial buildings and other fields.

sandwich panel line

A complete polyurethane sandwich panel production line typically consists of the following main components: uncoiling system, surface pretreatment system, forming system, foaming system, composite system, cutting system, stacking system, and automation control system. The entire production line can reach a length of 80-150 meters, and depending on the configuration, the production speed can reach 5-15 meters per minute.

Main equipment composition of insulation polyurethane sandwich panel production line

• Open book system
  The uncoiling system is the starting part of the production line, mainly including:
  Metal coil unwinding machine (usually equipped with 2 units, used for upper and lower panels)
  Automatic tape receiving device (realizing non-stop roll changing)
  Tension control system (to maintain smooth material transportation)
  Correction device (ensuring material alignment)

• Surface pretreatment system
  To improve coating adhesion, metal panels need to undergo pre-treatment:
  Cleaning device (removing surface oil stains)
  Chemical treatment (phosphating or chromizing treatment)
  Drying system (removing surface moisture)
  Bottom coating device (optional)

• Molding system
  The forming system processes flat metal into the desired plate shape:
  Multi pass roll forming unit (usually 12-24 passes)
  Hydraulic or servo drive system
  Quick mold changing device (suitable for different plate types)
  Online board type detection device

• Polyurethane foaming system
  The core foaming system includes:
  High pressure foaming machine (working pressure usually 120-200 bar)
  Raw material storage tanks (polyols and isocyanates)
  Temperature control system (to maintain stable raw material temperature)
  Measurement system (precise control of mixing ratio)
  Mixing head (high-pressure impact mixing)
  Cleaning system (to prevent clogging of the mixing head)

• Composite system
  Composite foam polyurethane with metal panel:
  Double track press (controlling plate thickness and flatness)
  Temperature control system (optimizing foaming process)
  Pressure regulation system (ensuring uniform composite)
  Maturation zone (let foam fully react)

• Cutting system
  Cut the continuous sheet into the required length:
  Flying saw or flying shear device (non-stop cutting)
  Length measurement system (precise control of cutting length)
  Waste recycling system (processing scraps)

• Stacking system
  Collection and stacking of finished boards:
  Automatic stacker crane
  counting system
  Packaging device (optional)

• Control system
  Fully automated control system:
  PLC control system
  Human Machine Interface (HMI)
  data acquisition system
  Fault diagnosis system

Production process flow

• Preparation of metal panels: The metal coil is unrolled, leveled, cleaned, and pre treated before entering the forming system.
  

• Plate forming: Metal panels are formed into the desired plate shape (such as concealed, exposed nail, etc.) through multiple passes of roller pressing.
  

• Polyurethane foaming: The high-pressure foaming machine precisely mixes polyols and isocyanates and injects them between two layers of panels.
  

• Composite curing: In a double track press, polyurethane foam expands and firmly adheres to the metal panel, while controlling the thickness of the board.
  

• Fixed length cutting: Continuous boards are precisely cut by flying saws or flying shears according to preset lengths.
  

• Finished product stacking: The cut finished boards are neatly stacked by an automatic stacker crane and prepared for transportation.

Insulated polyurethane sandwich panels are widely used in the following fields due to their excellent insulation performance and convenient construction:

• Industrial buildings (factories, warehouses)
  

• Cold chain logistics (cold storage, refrigerated trucks)
  

• Commercial buildings (supermarkets, exhibition halls)
  

• Clean engineering (pharmaceutical, electronic factory)

The production line of insulated polyurethane sandwich panels is an important component of modern building industrialization, and its technological level and product quality directly affect the performance of the final building. With the increasing demand for energy conservation and the development of building industrialization, such production lines will continue to move towards higher efficiency, intelligence, and environmental friendliness.