Principle of Color Steel PU Sandwich Panel Machine

The color steel pu sandwich panel machine, also known as the polyurethane color steel sandwich panel production line, mainly involves the steps of mixing raw materials, foaming, forming, and subsequent cutting and finishing.

sandwich panel machine

Raw material preparation and mixing

The production line first needs to mix the polyurethane raw material (usually composed of polyols and diisocyanates or polyisocyanates) in a certain proportion. This step is usually completed in a high-pressure foaming system to ensure that the raw materials can be evenly mixed, laying the foundation for the subsequent foaming process.

Foaming and Forming

• Foaming: The mixed polyurethane solution is uniformly poured onto the bottom color steel plate after being rolled and formed by a lower press molding machine. At this time, the polyurethane stock solution begins to foam under the action of the catalyst, forming a polyurethane foam layer with excellent heat insulation and heat preservation properties.
  

• Forming: At the same time, the upper color steel plate is also rolled and formed by a molding machine, and sent together with the foamed bottom color steel plate to the double coated belt host. The polyurethane foam is further solidified and formed between the upper and lower chain plates of the double clad host, and closely combined with the upper and lower color steel plates to form a composite sandwich panel.

Cutting and organizing

• Tracking cutting: The cured composite board is automatically tracked and cut into predetermined lengths by a band saw machine on the production line to meet the needs of different customers.
  

• Sorting and stacking: The cut color steel polyurethane sandwich panels are cooled by a mobile air cooling mechanism, and then neatly stacked by a stacking mechanism for subsequent transportation and use.

Key equipment and components

• Uncoiler: used for fixing and unwinding color steel coils, providing raw materials for subsequent molding.
  

• Pressure molding machine: According to the plate shape diagram, the color steel roll molding is carried out to form the required shapes of wall panels, roof panels, inner layer panels, etc.
  

• PU foaming machine: responsible for mixing and evenly pouring polyurethane solution onto color steel plates, it is a key equipment for achieving foaming molding.
  

• Double track host: used for foaming and curing the core material in sandwich panels, as well as curing and shaping the sandwich panels in a laminated state.
  

• Tracking cutting machine: automatically cuts composite boards according to preset lengths to improve production efficiency.

Performance characteristics

• Efficient automation: The entire color steel pu sandwich panel production line adopts computer automation control to achieve automated production of raw material mixing, foaming, molding, cutting and other processes, greatly improving production efficiency.
  

• Excellent performance: Color steel polyurethane sandwich panels have excellent thermal insulation, heat preservation, fire resistance, wind pressure resistance and other properties, and are widely used in high-end building roofs, wall panels, decorative panels and other fields.
  

• Energy saving and environmental protection: The color steel pu sandwich panel machinery uses environmentally friendly polyurethane raw materials, with no harmful substance emissions during the foaming process, and the product has good insulation performance, which helps reduce building energy consumption.

The color steel PU sandwich panel machine achieves efficient automation production of polyurethane sandwich panels through a series of precision processes and equipment components, and has broad application prospects and market value.