Large Size PU Sandwich Panel Machine

Large size polyurethane sandwich panel is a kind of energy-saving building panel, which is composed of two layers of metal panels (usually color steel plate, stainless steel plate or aluminum plate), which are filled with polyurethane rigid foam as the core material, and compounded at one time through a continuous polyurethane sandwich panel production line. This type of board has the characteristics of light weight, high strength, excellent thermal and sound insulation performance, fire and moisture resistance, and easy installation. It is widely used in construction fields such as industrial plants, cold storage, purification workshops, and prefabricated houses.

sandwich panel machine

The width of standard large-sized polyurethane sandwich panels is usually between 1000-1200mm, and the length can be customized according to needs, with a maximum length of 16 meters and a thickness range from 40mm to 200mm. In recent years, with the development of construction industrialization, the market demand for larger and higher performance sandwich panels has been increasing.

Composition of large-sized pu sandwich panel machine

The modern large-scale pu sandwich panel production machine is a highly automated and intelligent production system, mainly composed of the following key components:

• Open book system
  Dual station automatic unwinding machine, capable of non-stop roll changing
  Automatic correction device to ensure the centering accuracy of the board
  Preprocessing unit (cleaning, passivation, etc.)
  Initial forming device (pre folding processing)

• Polyurethane foaming system
  High pressure foaming machine (working pressure usually 150-250bar)
  Accurate measurement system (error controlled within ± 1%)
  Temperature control system (raw material temperature controlled at 20 ± 2 ℃)
  Mixing head (self-cleaning, mixing efficiency ≥ 98%)

• Composite molding system
  Double belt continuous laminating machine (length 30-60 meters)
  Temperature zoning control system (5-8 temperature zones)
  Pressure regulating device (adjustable from 0.1-0.5MPa)
  Synchronous traction system (speed matching accuracy ± 0.5%)

• Cutting system
  High speed hydraulic shear (cutting accuracy ± 1mm)
  Automatic fixed length measuring device
  Waste recycling system

• Post processing system
  Automatic stacker crane (with a carrying capacity of ≥ 2 tons)
  Packaging production line (automatic laminating, bundling)
  Finished product conveying system

Technological innovation

The modern large-scale polyurethane sandwich panel production line integrates multiple advanced technologies:

• Intelligent control system: adopting PLC+industrial computer architecture, realizing full process digital monitoring, and can store more than 1000 sets of process parameter formulas.

• Adaptive temperature control technology: automatically adjusts the foaming temperature curve based on environmental temperature and raw material characteristics to ensure stable quality throughout the year.

• Online quality inspection: integrating real-time monitoring methods such as infrared temperature measurement, ultrasonic thickness measurement, and X-ray density detection.

• Energy saving technology: The waste heat recovery system can save energy by more than 15%, and the efficiency of foam exhaust gas treatment can reach 95%.

• Modular design: easy to expand and upgrade production lines, compatible with the production of different types of sandwich panels such as rock wool and glass wool.

Equipment selection considerations:

• Product positioning (ordinary board/high-end board)

• Expected production capacity (annual output)

• Factory conditions (length, height, load-bearing capacity)

• Energy supply situation

• Automation level requirements

Daily maintenance focus:

• Regular inspection of foam sealing components (every 500 hours)

• Clean the mixing head (per shift)

• Calibration measurement system (weekly)

• Check the heating system (monthly)

• Lubricate transmission components (quarterly)

With the continuous improvement of building energy efficiency requirements and the rapid development of prefabricated buildings, large-sized pu sandwich panel manufacturing lines are evolving towards higher efficiency, intelligence, and environmental protection, providing higher quality enclosure structure solutions for modern buildings.