Polyurethane Sandwich Panel Foam Production Line

The polyurethane sandwich panel foam production line is the core equipment for modern building insulation material production, widely used in the manufacturing of insulation panels in cold storage, factory buildings, purification workshops and other places. This type of production line uses automation technology to foam and composite polyurethane raw materials between two layers of metal or non-metal plates, forming sandwich structural panels with excellent insulation performance.

sandwich panel line

The polyurethane sandwich panel foaming production line integrates multiple fields of technology such as mechanical engineering, chemical foaming, and automation control, with the core being high-pressure foaming system and continuous molding process. High pressure foaming technology is a key link in the production line. By precisely controlling the mixing ratio and reaction conditions of polyols and isocyanates, the raw materials are foamed and cured in the mold. Modern equipment often uses cyclopentane foaming system, which has superior environmental performance and can be flexibly adjusted according to product needs.

The continuous sandwich panel production line has achieved full process automation from coil unwinding, surface treatment, foam filling to finished product cutting. The operating speed of the production line can reach 5-8 meters per minute, with a daily output of over 2000 square meters. Some high-end equipment is equipped with a dual track laminating system, which ensures the flatness and bonding strength of the sheet metal through precise temperature control and pressure regulation.

The temperature control system is crucial for product quality. Modern production lines often use PID intelligent control oil temperature machines or electric heating systems, with temperature control accuracy up to ± 1 ℃. The temperature in the foaming zone is usually maintained at 40-50 ℃ to ensure the optimal reaction conditions for polyurethane raw materials. Some devices are also equipped with infrared or hot air circulation systems to achieve rapid initial curing of the board.

A complete polyurethane sandwich panel foam production line consists of multiple functional modules, which work together to achieve efficient production.

• The unwinding and leveling system is the starting section of the production line, usually equipped with dual unwinding machines to achieve automatic coil changing, and can handle metal coils with a maximum thickness of 2mm and a width of 1500mm. The leveling machine adopts a 7-11 roller structure to eliminate internal stress in the material and ensure that the flatness error of the board is less than 1mm/m. Some high-end equipment also integrates cleaning and drying devices to improve the bonding performance of surface materials and foam.
  

• The foam infusion system is the core part, including high-pressure foam machine, mixing head, pouring platform, etc. The working pressure of modern high-pressure foaming machines can reach 10-20MPa, with a flow control accuracy of ± 1%. They are equipped with self-cleaning mixing heads to reduce raw material waste.
  

• The double track laminating machine forms the forming area, usually between 12-24 meters in length, and a closed cavity is formed by the upper and lower tracks. The surface of the track is often coated with PTFE or mirror stainless steel material, which is both anti stick and easy to clean. The pressure regulation system can be controlled in zones to meet the production needs of different thickness plates.
  

• The cutting and stacking system completes the final process, using flying saws or servo cutting machines with a cutting accuracy of ± 0.5mm. The fully automatic palletizing machine achieves neat stacking of finished boards through vacuum suction cups or mechanical arms, with a maximum stacking height of up to 2 meters, greatly reducing manual intervention.
  

• The auxiliary system includes a raw material constant temperature system, a waste gas treatment device, and a central control system (PLC+human-machine interface) to jointly ensure the stable operation of the production line.

The products manufactured by the polyurethane sandwich panel foam production line have been widely used in multiple fields due to their excellent performance.

• Cold storage construction is the main application field, and professional production lines can produce suitable ultra-low temperature storage panels by adjusting the foaming formula.
  

• Industrial plant applications focus on the strength and fire resistance of the boards. By adjusting the production line process, reinforced sheets with a surface thickness of 0.5-1.2mm and a bending strength of ≥ 120kPa can be produced. Some devices can also be reinforced with aluminum foil or fiberglass cloth to improve product durability.
  

• Purification engineering has special requirements for the board, such as antibacterial coating, anti-static treatment, etc. The dedicated production line can integrate surface coating technology to directly produce clean room panels, reducing secondary processing.
  

• The mobile housing industry is growing rapidly, requiring lightweight and easy to install panels. Modern production lines have reduced the weight of boards by more than 20% by optimizing foaming parameters and using high-strength thin surface materials.

It is worth noting that different application fields have special requirements for production line configuration. The production of cold storage panels requires strengthened moisture-proof layer treatment; Purification board production requires a clean room environment; The exterior wall panels of buildings need to consider weather resistance testing, etc. When selecting equipment, full consideration should be given to the target market demand.