Flame Retardant PU Sandwich Panel Line

The flame retardant pu sandwich panel production line is a highly automated industrial equipment designed specifically for producing polyurethane sandwich panels with excellent fire resistance performance.

sandwich panel line

The flame retardant pu sandwich panel line combines polyurethane foam material with metal or non-metal surface layers to form building panels that are both insulated, fire-resistant, lightweight, and high-strength. They are widely used in industrial plants, cold storage, purification engineering, and other fields.

Equipment Composition

• Open book and pre-processing system
  Uncoiler: used for unfolding metal coils (such as color steel plates, aluminum foils) or soft substrates (such as non-woven fabrics, cement-based coils), equipped with tension control and correction devices to ensure smooth material transportation.
  Preheating device: Preheating the substrate through electric heating or hot air circulation to optimize the polyurethane foam bonding effect.
  Compression molding machine: laminating ribs or forming on metal surfaces to enhance the structural strength of the sheet and meet different building appearance requirements.

• Foam and Composite System
  High pressure foaming machine: The core equipment mixes polyurethane black and white materials (A/B components) in proportion, adds flame retardants, and achieves uniform foaming through high-pressure spraying.
  Double track laminating machine: The length is usually 24-40 meters, and the distance between the upper and lower tracks can be adjusted. The polyurethane is cured and formed between the surface layers through heating and pressure, ensuring uniform density of the board.
  Rock wool/glass wool conveying system (optional): used for producing polyurethane edge sealed rock wool composite panels, improving fire resistance level through automatic cutting and filling technology.

• Post processing and automation control
  Edge trimming machine: Cut off the burrs on both sides of the board with an accuracy of ± 1mm.
  Fixed length cutting machine: using a follow-up saw or circular saw to achieve length customization, equipped with a vacuum cleaner to reduce pollution.
  Stacking and packaging system: automatic stacking and laminating to improve production efficiency.
  PLC control system: realizes precise control of temperature, speed, pressure and other parameters, supports fault alarm and remote monitoring.

Production Process Flow

• Substrate preparation: Metal coil is unrolled, pressed, or soft substrate is transported to the production line through vacuum suction cups.
  

• Foaming infusion: Polyurethane raw materials are sprayed onto the lower substrate through a high-pressure mixing head, and the upper substrate is synchronously covered before entering the double track machine for foaming and curing.
  

• Forming and cutting: The foamed board is cooled and shaped, and then cut to a fixed length through photoelectric length measurement or marking recognition.
  

• Quality inspection: Check the flatness, flame retardant performance, and core material density of the board.

Application Field

• Construction industry: wall panels and roof panels for steel structure factories, sports halls, and airport terminals.
  

• Cold chain logistics: Insulation board for cold storage with low thermal conductivity.
  

• Special environment: places with strict fire prevention requirements such as purification workshops and fire partitions.

The flame retardant pu sandwich panel line continuously improves product performance and production efficiency through technological innovation, becoming an important support for modern building energy conservation and safety.