PU Sandwich Panel Production Line For Prefab House Factories

The polyurethane sandwich panel production line is an efficient production system tailored for the prefabricated housing manufacturing industry, specifically designed for the continuous production of composite panels with excellent insulation performance. This production line combines metal panels (steel plates or aluminum plates) and polyurethane foam core materials through automatic process to form lightweight and high-strength building panels, which are widely used in prefabricated buildings, temporary houses, refrigerators, clean plants and other fields.

sandwich panel line

The continuous pu sandwich panel line adopts modular design, integrating material conveying, forming, foaming, curing, cutting, and stacking processes, realizing a fully automated production process from raw materials to finished products, greatly improving production efficiency and product quality stability.

The main components of the pu sandwich panel production line

• Loading system
  Metal panel unwinding machine: equipped with a dual station design, it can achieve non-stop roll changing and ensure production continuity. Adopting hydraulic tensioning device, suitable for steel coils with different inner diameters.
  Panel pre-processing unit: including automatic cleaning device (to remove surface oil stains), drying system, and electrostatic precipitator equipment to ensure the cleanliness of the bonding surface.
  Panel Forming Machine: A multi pass roll forming system that processes flat metal into the desired waveform or planar shape, with a forming accuracy of up to ± 0.1mm.

• Polyurethane foaming system
  High pressure foaming machine: adopting the latest generation of high-pressure mixing head technology, the mixing pressure can reach 120-200 bar, ensuring sufficient mixing of polyurethane raw materials. Equipped with precise temperature control system (± 1 ℃) and metering system (accuracy ± 0.5%).
  Raw material storage tank system: including isocyanate (MDI) and polyol storage tanks, with constant temperature control (25 ± 2 ℃) and nitrogen protection function to prevent raw material deterioration.
  Automatic ingredient system: Automatically adjust the dosage of foaming agents, catalysts, and other additives according to the formula ratio, supporting the storage and retrieval of multiple formulas.

• Core equipment of composite production line
  Continuous laminating machine: Adopting a double track design, the pressure is uniformly adjustable (0.1-0.5MPa), the length is usually 20-40 meters, and equipped with segmented temperature control (40-80 ℃) to optimize the curing process.
  Synchronous conveying system: high-precision servo control ensures precise alignment between the upper and lower metal panels and the foam layer, with a speed matching error of less than 0.5%.
  Online curing area: a constant temperature curing channel (45-60 ℃) with a length of 15-25 meters to ensure complete curing of polyurethane and improve the performance of the final product.

• Post processing system
  Automatic trimming device: High speed circular saw or flying knife system, accurately cutting excess material on the edge of the board, with a cutting accuracy of ± 1mm.
  Automatic fixed length cutting: servo controlled cross cutting saw, programmable cutting length (usually 2-12 meters), cutting accuracy ± 1mm, supports oblique cutting function.
  Finished stacker crane: automatic sorting and stacking system, with a maximum stacking height of up to 2 meters, equipped with air cushion auxiliary device to prevent board scratches.

Performance characteristics of pu sandwich panel

• Excellent insulation performance: thermal conductivity as low as 0.018-0.024W/(m · K), far superior to traditional building materials
  

• High strength to weight ratio: The bending strength can reach over 200kPa, and the self weight is only 1/10-1/5 of traditional building materials
  

• Excellent fire resistance: up to B1 level flame retardant standard (adjusted according to formula)
  

• Good sound insulation effect: Air sound insulation level ≥ 25dB
  

• Durability: Strong weather resistance, with a service life of over 25 years
  

• Environmental protection features: Some products are recyclable, and environmentally friendly foaming agents can be used in the production process

The polyurethane sandwich panel production line is equipped with advanced intelligent control system:

• Central control room: Integrated PLC+industrial computer control to achieve full line automation operation
  

• Human computer interface: 10-15 inch touch screen, visual operation, supporting parameter preset and process storage
  

• Online monitoring system: including thickness detection, density detection, and defect recognition
  

• Remote diagnosis: supports equipment manufacturers to remotely diagnose faults and upgrade systems

When choosing a polyurethane sandwich panel line, the following factors should be considered:

• Product positioning: Determine board specifications and performance requirements based on target market demand
  

• Capacity planning: selecting production lines with appropriate capacity based on investment budget
  

• Automation level: Balancing initial investment and long-term labor costs
  

• Scalability: Consider the space for future product upgrades and technological transformations
  

• Supplier qualification: Priority should be given to equipment manufacturers with rich experience and technical strength

Application of pu sandwich panel manufacturing line:

• Residential buildings: used for rapid construction of affordable housing, vacation homes, etc
  

• Commercial buildings: mall partitions, office partitions, etc
  

• Industrial buildings: clean rooms, logistics warehouses, etc
  

• Special applications: mobile homes, temporary disaster relief housing, refrigerated truck containers, etc