Automatic PU Sandwich Panel Machine

The automatic pu sandwich panel machine is an intelligent production equipment that integrates mechanical, electronic, and chemical technologies, specifically designed for continuous production of polyurethane (PU) sandwich panels. This equipment combines the metal panel (usually color steel plate or stainless steel) with polyurethane foam core through highly automated process to form building panels with excellent thermal insulation performance.

sandwich panel machine

Compared with traditional manual production methods, fully automated pu sandwich panel production lines have significant advantages such as high production efficiency, stable product quality, low labor intensity, and high utilization of raw materials. A standard production line can produce 150-300 square meters of sandwich panels per hour, which is 10-15 times higher than manual production, and the product quality is uniform and consistent, fully meeting the strict requirements of modern construction industry for material performance.

The main components of an automatic pu sandwich panel machine

• Open book system
  The unwinding system is the starting point of the polyurethane sandwich panel production line, usually including:
  Dual station unwinding machine: capable of non-stop roll changing and improving production efficiency
  Automatic correction device: Ensure that the centering accuracy of the metal coil is within ± 1mm
  Preprocessing unit: including cleaning, passivation and other processing techniques to enhance the bonding strength between the panel and the core material

• Forming system
  The forming system is responsible for processing flat metal coils into the required plate shape:
  Multi roll continuous forming machine: using 16-24 composition roller wheel progressive forming
  Hydraulic servo system: precise control of forming pressure and speed
  Quick mold changing device: capable of switching between different plate types within 30 minutes

• Bubbler System
  The core foaming system consists of the following units:
  High pressure foaming machine: The working pressure is usually in the range of 120-200 bar
  Temperature control unit: Accurately control the temperature of raw materials within ± 0.5 ℃ range
  Mixing head: Adopting a self-cleaning design, the mixing efficiency reaches over 98%
  Measurement system: Flow accuracy can reach ± 1.5%

• Composite system
  The composite system achieves the perfect combination of panel and core material:
  Double track press: pressure evenly adjustable (0.1-0.3MPa)
  Temperature control platform: maintain the optimal foaming temperature environment
  Online thickness gauge: Real time monitoring of sheet thickness (accuracy ± 0.2mm)

• Cutting system
  The fully automatic cutting system includes:
  Flying saw cutting unit: cutting accuracy ± 1mm
  Automatic stacker crane: maximum stacking height can reach 2 meters
  Waste recycling device: realizing automatic recycling and utilization of scrap materials

• Control system
  The intelligent control system is the brain of the polyurethane sandwich panel production line:
  PLC+Industrial PC Dual Control System
  Human Machine Interface (HMI) Operating Platform
  Remote monitoring and fault diagnosis function
  Production Data Automatic Collection and Analysis System

Core technical parameters of automatic pu sandwich panel machine

• Production line speed: 3-12 meters/minute (adjustable)
  

• Product width: 800-1200mm (standard), special specifications can be customized
  

• Board thickness: 30-200mm
  

• Panel thickness: 0.3-0.8mm
  

• Density range: 35-60kg/m ³
  

• Thermal conductivity: 0.018-0.024W/(m · K)
  

• Compressive strength: ≥ 150kPa
  

• Fire rating: up to B1 level (adjusted according to formula)

Production process flow of automatic pu sandwich panel machine

• Panel pretreatment: uncoiling → cleaning → passivation → drying
  

• Forming processing: forming the required plate shape through multiple roller presses
  

• Injection foaming: precise measurement and injection of polyurethane mixture
  

• Composite curing: foaming and bonding process completed under controlled environment
  

• Fixed length cutting: automatically cut according to the set length
  

• Finished product stacking: automatic stacking and packaging

Technical advantages and innovation points of automatic pu sandwich panel machine

• Energy saving and environmentally friendly design:
  Thermal energy recovery system can save 15-20% energy
  Closed loop foaming process reduces VOC emissions
  The waste recycling rate is over 95%

• Intelligent control system:
  Adaptive PID Temperature Control Algorithm
  Quality Inspection System Based on Machine Vision
  Big data analysis optimizes production processes

• Modular design:
  Quick replacement mold system
  Scalable production line configuration
  Easy to maintain structural design

• Advanced foaming technology:
  High voltage impact mixing technology
  Nano modified polyurethane formula
  Low temperature foaming process

The products produced by automatic pu sandwich panel machines are widely used in:

• Industrial plants and storage facilities
  

• Cold storage and cold chain logistics center
  

• Cleanrooms and pharmaceutical factories
  

• Commercial buildings and mobile homes
  

• Agricultural greenhouse and special buildings

Suggestions for the selection and maintenance of automatic pu sandwich panel machines

• Selection considerations:
  Capacity demand and product specifications
  Equipment energy consumption and environmental indicators
  Supplier's technical support capability
  Equipment upgrade and expansion possibilities

• Daily maintenance points:
  Regularly inspect the hydraulic and pneumatic systems
  The foaming system is thoroughly cleaned every week
  Quarterly electrical system testing
  Annual comprehensive maintenance and calibration

• Operator training:
  Equipment operation specifications
  Safety protection knowledge
  Emergency handling of faults
  Optimization of process parameters

With the continuous improvement of building energy-saving requirements and the rapid development of intelligent manufacturing technology, automatic pu sandwich panel machines are evolving towards higher efficiency, intelligence, and environmental friendliness, providing high-quality insulation solutions for the modern construction industry. Choosing appropriate production line equipment and mastering scientific operating methods will significantly enhance the market competitiveness and economic benefits of enterprises.