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The continuous PU/PIR Sandwich Panel Production Line is a fully automatic continuous production line with the technology of mechanical, electric, liquid and polyurethane (chemical) polymerization and composed of several machines. The production line adopts international and domestic advanced roll forming technology and polyurethane (chemical) foaming technology, composite transfer technology, CNC servo control technology、variable frequency vector technology and hydraulic control technology,automatic stacking technology. Only 6-8 operators are required to run the whole line.
| Item | Parameter | |
| Suitable raw material | Type | Color steel sheet/Stainless steel sheet/ Aluminum sheet |
| Thickness (mm) | 0.4-0.8(steel sheet) 0.35-0.7(Stainless steel sheet) | |
| Width (mm) | ≤1250 | |
| Weight(T) | 6T/10T | |
| Core materials | PU、PIR | |
| Product Specification | Panel Length(mm) | 2000-18000 |
| Panel Width(mm) | 600-1200 | |
| Panel Thickness(mm) | 30-200/250 Cold Storage Panel | |
| Production Speed(m/min) | 3-10 Adjustable | |
| Effective Length of Double belt (mm) | 12000-42000 | |
| Working Pressure of Pouring Foam (Bar) | 150-200 | |
| Total Power (KW) | About 200 Excluding the Heating Power | |
| Total size (Length x Width x Height (M) | (90-200)x (16-30)x6 | |
The uncoiling system is responsible for smoothly uncoiling the coiled steel plates, processing them through guiding and leveling devices, and then conveying them to the next process, so as to provide continuous and flat plate raw materials for the production line.
The film covering and cutting system of the polyurethane sandwich panel production line is used to accurately cover the protective film on the surface of the formed panels and automatically cut the film according to the required length of the panels, so as to protect the panel surface from damage and facilitate subsequent processing.
The forming system processes pre-treated steel plates and core materials (such as rock wool, polyurethane, etc.) into sandwich panels with specific cross-sectional shapes through processes like roller pressing and lamination, and it is a key link that determines the structure and shape of the panels.
The entire rock wool system consists of a hoist, a slitting machine, a 90° flipping and aligning device, an edge trimming and grooving device, a dust removal device, etc.
The heating of steel plates is achieved through electric heating via heating tubes. This design features a simple structure and allows for constant temperature control.
Foaming refers to delivering two types of polyurethane to the gun head via metering pumps. The polyurethanes are atomized and mixed through the static mixing tank in the gun head, and then the mixed polyurethane is accurately and evenly poured onto the specified left and right positions of the steel plate through the mixing head for foaming.
The double belt mainly consists of the following parts:
Upper and lower belts, left and right side belts, fixed upper and lower belt frames, nylon modules, transmission mechanisms, etc
The main function of the upper and lower belts is to compress the steel plate and composite material, and determine the thickness of the composite plate and the speed of the production line.
The main function of the band saw machine is to automatically measure the continuous finished boards via a length-measuring encoder according to the required board length parameters, and automatically cut them without stopping the production line. Meanwhile, it absorbs the dust generated during cutting.
The drying system is used for statically drying the composite-formed sandwich panels, allowing the adhesives and polyurethane in the panels to fully cure and set, ensuring the panel structure is stable and performance meets standards, and providing qualified semi-finished products for subsequent processing.
The high-speed roller table enables the composite boards cut by the band saw machine to quickly separate from the boards before cutting and transports the boards to the designated position.
After the stacked plates are conveyed to the packing machine via the roller table, they are wrapped with film from head to tail. During packaging, the number of reinforcing wrapping turns at the head and tail is controlled manually.
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