High Efficiency PU Sandwich Panel Machine On Sales

The polyurethane sandwich panel produced by the high efficiency pu sandwich panel machine is widely used in the construction industry as a high-performance composite building material due to its excellent insulation, fire resistance, flame retardancy, and lightweight and high-strength characteristics.

sandwich panel machine

Polyurethane sandwich panel machine refers to a specialized machinery that foams polyurethane raw materials through chemical reactions and combines them with two layers of metal or non-metal panels to form a sandwich structure. After years of development, this type of equipment has evolved from early manual operations to highly automated and intelligent continuous sandwich panel production lines.

Contemporary efficient pu sandwich panel machines typically have the following characteristics:

• Fast production speed: Modern sandwich panel lines can reach speeds of 3-6 meters per minute, with a daily output of over 1000 square meters
  

• High degree of automation: adopting PLC control system to achieve automatic feeding, precise proportioning, constant temperature control, and finished product cutting
  

• Flexible product specifications: can produce various specifications of boards with a width of 400-1200mm and a thickness of 20-100mm
  

• Energy saving and environmental protection: The new equipment adopts a heat recovery system to reduce energy consumption and exhaust emissions

From the perspective of equipment types, they are mainly divided into two categories: continuous pu sandwich panel production lines and intermittent production lines. Continuous sandwich panel lines are suitable for large-scale standardized production, while intermittent equipment is more suitable for customized production of small batches and multiple varieties.

A complete pu sandwich panel line consists of multiple functional modules, each of which is related to the quality and production efficiency of the final product.

• Raw material processing system
  Raw material storage tank: usually equipped with two storage tanks for material A (polyether/polyester polyol) and material B (isocyanate), with capacities ranging from 1100L to 5000L, equipped with stirring and temperature control devices
  Measurement pump set: high-precision gear pump or plunger pump, measurement accuracy can reach ± 1%, frequency conversion speed control flow rate
  Mixing head: High speed stirring type mixing head, with a speed of up to 4500-6000r/min, ensuring thorough mixing of raw materials

• Molding system
  Double track laminating machine: usually 24 meters in length, using hydraulic lifting to adjust thickness, with heating temperature maintained at around 60 ℃
  Chain plate unit: made of aluminum alloy or stainless steel, with special surface treatment to ensure flatness and demolding properties
  Temperature control system: electric heating or fuel hot air stove heating, zone temperature control, temperature difference controlled within ± 2 ℃

• Auxiliary system
  Uncoiler: Dual station design with automatic correction and tension control, suitable for coil width of 1200-1500mm
  Preheating device: infrared or hot air heating, preheating the substrate to 40-50 ℃ to improve foaming effect
  Edge trimming device: high-speed rotating cutting tool, accurately trimming both sides of the board, equipped with a vacuum cleaner

At present, mainstream equipment adopts high-pressure foaming technology, which has the advantages of more uniform mixing, finer foam pores, and lower raw material loss compared to traditional low-pressure foaming.

The production of polyurethane sandwich panels is a continuous chemical reaction process, and each link requires precise control. The standard production process is as follows:

• Substrate preparation:
  The upper and lower panels (color steel plates, aluminum plates, etc.) are unfolded by an uncoiler
  Cleaning and preheating through pre-processing equipment
  Accurately align and enter the forming area

• Polyurethane foam:
  A. B raw materials are transported to the mixing head by a metering pump according to the set proportion
  After high-pressure impact mixing, evenly pour it onto the lower panel
  The upper panel is synchronously covered to form a "sandwich" structure

• Molding and solidification:
  Enter the double track laminating machine and foam and solidify at the set temperature and pressure
  The foaming time is about 5-8 minutes, depending on the thickness of the board
  Temperature control is crucial as it directly affects the foaming rate and closed cell rate

• Post processing:
  Edge trimming machine to remove overflow material on both sides
  Automatic tracking cutting machine cuts according to the set length
  Palletizing packaging or directly entering the maintenance area