PU Sandwich Panel Line
The PU Sandwich Panel Line is an efficient, stable, and reliable production equipment that can meet the large demand of users for polyurethane sandwich panels. When choosing and using, users should fully understand its working principle, equipment composition, product characteristics, and market price information in order to make informed decisions.
PU sandwich panel is a composite board with bimetallic, single metal, and non-metal surfaces using polyurethane rigid foam as the insulation layer. It is commonly used in industrial plants, logistics and warehousing, wall and roof enclosure systems of integrated houses, as well as external wall insulation and central air conditioning supply ducts. The PU Sandwich Panel Line is a special equipment for the production of phenolic (polyurethane) foam sandwich panels in soft surface substrates such as cement cloth, aluminum foil, non-woven fabric and paper.
The working principle of the PU Sandwich Panel Line mainly involves steps such as raw material mixing, pouring, foaming and curing, and cutting.
Raw material mixing: two components of hard foam raw materials (i.e. polyurethane stock solution) are sent to the mixing head by the metering pump of the high-pressure foaming machine at a certain ratio for mixing.
Pouring: The uniformly mixed polyurethane raw materials are evenly distributed on the bottom layer surface of the sandwich panel and transported to the laminating machine together with the upper layer surface material.
Foam curing: Polyurethane raw materials are foamed and cured between the upper and lower chain plates of the laminating machine.
Cutting: After the cured sandwich panel is trimmed on both sides of the production line, it is automatically tracked and cut into the required length by a cutting machine.
The main equipment of the PU Sandwich Panel Line includes unwinding system, steel plate feeding system, steel plate automatic docking system, reinforcement unit, forming machine system, high-strength bonding system between steel plate and polyurethane, corona system, steel plate preheating, double track machine and heating system, rock wool automatic slitting and conveying system, n-pentane foaming system, cutting saw, etc. These devices work together to complete the entire process from raw material mixing to finished product cutting.
Characteristics of PU Sandwich Panels
Efficient insulation: Polyurethane sandwich panels have excellent insulation performance, with a thermal conductivity much lower than that of air, and their closed cell and high resistance to gas diffusion make them have long-term insulation properties.
Strong corrosion resistance: Polyurethane sandwich panels have superior air and moisture resistance, and are easy to assemble without the need for additional insulation layers to prevent moisture.
Wide, light and thin wall: polyurethane rigid foam acts as structural material at the same time, making the overall structure have the advantages of light weight, large span and high load. Thinner polyurethane sandwich panels can meet the relevant regulations on building energy consumption limits and save building space.
Stable quality and high production efficiency: The factory production line of polyurethane sandwich panels facilitates quality control, improves production efficiency and economy.
Good weather resistance and easy installation: Polyurethane sandwich panels can be directly used for building installation after being prefabricated in the factory, with fast construction and no need to consider weather changes.