Continuous Sandwich Panel Line: Producing Insulation-Effective Panels

Composition of Continuous Sandwich Panel Line

The continuous sandwich panel line mainly includes a roll forming machine, a foaming machine, and a laminating machine. During production, steel coils are uncoiled and cut after being roll-formed. The bottom plate, top plate, and four sides are manually placed to create an enclosed structure, which is then compressed by the roof mechanism. Subsequently, the PU foaming machine injects foam to form the panel. While the foam is being injected and cured for two panels, loading and unloading process occurs for the other two panels, ensuring a continuous in-and-out workflow.

The laminating machine includes a hydraulic control system for the double belt machine and a roof team. Each panel type is equipped with four sets of aluminum edge sealing blocks (to create a sealed space with the upper and lower wall panels, tailored based on different panel types). The hot air temperature system can accelerate the curing and maturation time of PU foam, resulting in better molding effects. The standard length of the continuous polyurethane sandwich panel laminator is 6 meters, with the longest being up to 12 meters. The daily production (8 hours) is approximately 300 square meters. The steel plate width ranges from 800-1200mm, and the composite panel thickness ranges from 50 to 250mm. The total power is about 220 kW.

Characteristics of Continuous Sandwich Panel Line Equipment

The characteristics of the continuous sandwich panel line include a smaller equipment size compared to other sandwich panel production lines, economical price, flexible panel dimensions, suitability for producing specially designed panels and low production requirements, making it ideal for constructing polyurethane color steel sandwich panels for cold storage type buildings. The continuous rigid foam plastic sandwich panel production line produces panels with the upper and lower layers as embossed aluminum foil and the middle layer as flame-retardant polyurethane or polyisocyanurate. The specifications of the sandwich panels are thickness 20-150 mm, width 1200 mm, and length customizable. The products are mainly used for external wall insulation.

This continuous sandwich panel line can also produce other soft-faced insulating sandwich panels. Its working principle is as follows: the raw liquid of the rigid foam plastic is metered by the dispensing pump of the pouring machine and sent to the mixing head in a specific ratio for mixing, then uniformly poured onto the bottom surface material of the sandwich panel. Along with the top surface material, it is conveyed into the laminating conveyor, where it is foamed and cured between the upper and lower conveyor belts. After curing, the sandwich panels are trimmed on both sides and cut to the required length by the automatic tracking cutting machine on the continuous sandwich panel line. This continuous sandwich panel line consists of an embossing unit, two sets of unwinding devices, an aluminum foil preheating device, a foaming machine, a mobile pouring machine, an edge paper attaching device, a laminating conveyor, a hot air circulation device, a trimming device, an automatic tracking cutting machine, and roller frames. The continuous sandwich panel line equipment is used for producing PU insulation panels and has been recognized by users. It is widely used in steel structure factories, residential buildings, supermarkets, and public places.

The production processes of PU insulation panels and phenolic insulation panels are similar, but they differ in the foaming methods and material composition, leading to differences in their application ranges within external wall insulation systems.