Heavy-duty PU Sandwich Panel Production Line For Industrial Building Panels

The polyurethane sandwich panel is an important building material in the field of contemporary industrial architecture. It is composed of two layers of high-strength metal panels (usually aluminum zinc plated steel plate or stainless steel plate) and the middle polyurethane rigid foam core material through a special process. This sandwich structure material has excellent thermal insulation performance, high strength to weight ratio, and excellent fire resistance, and is widely used in large industrial plants, logistics warehouses, cold storage and other places that require high-strength enclosure structures.

sandwich panel line

Compared with traditional building materials, the products produced by heavy-duty pu sandwich panel production lines have the following advantages:

• The compressive strength can reach over 150kPa
  

• Thermal conductivity as low as 0.022W/(m · K)
  

• The fire rating can reach B1 level or higher
  

• The service life can reach more than 25 years
  

• Installation efficiency increased by 60% compared to traditional building materials

The heavy-duty polyurethane sandwich panel production line is a highly automated integrated system, which mainly includes the following key equipment:

• Automatic feeding system:
  Double station steel plate unwinding machine
  Automatic correction device
  Board cleaning unit
  Pre treatment spraying system

• Forming unit:
  Multi roll continuous cold bending forming machine (12-24 sets of rollers)
  Online size detector
  Automatic cutting device
  Waste recycling system

• Polyurethane foaming system:
  High pressure foaming machine (working pressure 150-250bar)
  Accurate temperature control system (± 0.5 ℃)
  Polyol and isocyanate storage tanks
  Automatic mixing head and cleaning device

• Composite curing section:
  Double layer crawler press
  Infrared preheating device
  Temperature controlled solidification tunnel (length 30-60 meters)
  cooling system

• Post processing and packaging:
  Automatic trimming machine
  Finished cutting saw
  Packaging automation system
  Stacking robot

The production of polyurethane sandwich panels is a precision controlled continuous process:

• Panel preprocessing:
  After being uncoiled and leveled, the steel plate enters the cleaning section to remove surface oil stains
  Apply anti-corrosion primer by roller coating or spray coating
  Complete coating curing in the drying oven (temperature 180-220 ℃)
  

• Panel Forming:
  The preprocessed panel enters the continuous cold bending forming machine
  Gradually form the required plate shape through multiple sets of precision rollers
  Real time monitoring of molding accuracy using online laser rangefinder
  

• Polyurethane foam:
  High pressure foaming machine mixes polyols and isocyanates in precise proportions
  The mixture is transported to the composite section through a temperature controlled pipeline
  Inject foam material between the upper and lower formed panels
  

• Composite curing:
  The slab enters the double-layer track press to control the foam thickness and density
  Fully cure polyurethane through temperature controlled tunnel
  The cooling section reduces the plate temperature to below 40 ℃
  

• Fixed length cutting:
  Automatically measure and cut according to order requirements
  The adjustable range of oblique angle is 30 ° -60 °
  Cutting accuracy controlled within ± 1mm
  

• Quality inspection and packaging:
  Automatically detect board thickness, flatness, and appearance
  Automated stacking by robotic arm
  Wrapped packaging or customized wooden crate packaging

The pu sandwich panel line products are mainly used for:

• Large industrial plant walls and roofs
  

• Cold Chain Logistics Center
  

• Aerospace facilities
  

• clean room
  

• Modular architecture