PU sandwich panel production line

     

Outline drawing of the line:

Technical parameters of the line:

Roll forming (profiling) line Main points : This line consists of roll car, unwinder and upper/lower roll forming equipment. The most important features in this line are roll quality and electrical synchronization, including a dual belt conveyor. The coils must go through several heat treatment and precision machining processes, and then the hard chrome plating process guarantees more than 10 years of service. If this is not the case, the rolls will wear out easily and the service life will be much shorter, resulting in a lower quality of the panel. The hard chrome coating provides a high level of durability and protects the colored coil (steel layer) paint from peeling during roll forming. Electric synchronization is designed to ensure the same speed in steel sheet opening, roll forming and double transport. In addition, the rotation speed of the upper and lower rollers should be the same. Otherwise, the panel production will not be completed successfully and the production facilities themselves may be damaged. This is a package designed to transport and deliver a bundle of coiled steel sheets (coils) to the quenching device. Lifting up and down is done by 4 wheels on the rail and a hydraulic cylinder that moves right and left supported by 4 wheels. Two units are required to operate the upper coil and lower coil.

Technical data: Roll spreader, 2 sets The steel sheet (slat) is installed on the opener by the roller carriage, in which 4 pins are expanded, then 4 wedges are expanded, fixed by hydraulic power, and then driven by a motor. A rubber roller is mounted on the opener to prevent the reel (steel plate) from twisting suddenly and over-twisting in motion. Cutting device It consists of a blade driven by a compressed air cylinder, which is designed to set the M/C cutting pattern that initially forms the roll, and then cuts the steel sheets to the same panel length. It is also designed for cutting without interrupting the production line. This machine is designed to protect the panel skin by sticking the protective film while controlling the tension of the protective film, 1 roll must be installed and each one is connected without stopping the line.   Top steel plate corona device for bottom component ● High frequency corona device   Top Roll Forming Machine - Fixed Width Type (1000mm) The upper roll forming machine is primarily responsible for forming the shapes of both sides of the lower coil (steel plates) to use the joining parts of the roof and wall (including interior) panels. It has an easy-to-change setting in case different panel shapes are required for production. The stationary reduction device is conveniently located on the undercarriage frame, which allows quick replacement of roll forming units. Bottom Steel Roll Forming Blocks, Roof 4 Compartment and Boltless, SS (Cold Room) Panel Installation type - moving rail type

Roller Conveyor --- 3 sets (roller-ø60mm×1,200mm(L) Electric control system This device is installed separately on the upper and lower forming line. The main control panel next to the PU foam block controls the speed (whole line when in manual mode) The roll former has a small manual control panel to test the roll former unit. --- Main: 2 sets / operation panel: 2 sets Electricity 380v or 440v × 50Hz Preheating system with electric heater This device is used for moderate heating of upper and lower steel plates temperature after the roll forming process. Since polyurethane undergoes a chemical reaction at moderate heat, the process of heating steel the sheet activates the PUR and forms an adhesive bond between the steel sheet polyurethane foam flooring is stronger. The heating mechanism is a flow of air heated by a gas or electric heater and directed to it upper and lower steel plates. The temperature sensor is mounted on the upper and lower brackets, which make the installation the actual temperature can be adjusted to any desired temperature. The housing is tunnel type and heated air to prevent heat loss supplied directly to the tunnel. The temperature of the steel plates after preheating is on average 40 ~ 60 ° C. Higher temperature can cause the PUR to react earlier and produce a lower quality panel. Temper. Circulation air: Max. 90 ° C, adjustable Steel plate temperature: 40°C ~ 60°C Type of temperature control: Automatic. management Warming room size: About 4 m (L) × 3 m (W) × 3.5 m (H) Heating capacity: 40 kW Heating method: Electric heater Chiller (30RT) The distribution pressure is maximum 200 bar/min Production volume for each pump - Max. 32l/min at 50 Hz Required viscosity level-Max. 2,000 mPas     The sleeper system through the steel panels for the bottom roll forming machine:       Hardware function:   The oscillating action of the stirring part is important for optimal results It is applied to the bottom coating layer of the PUR-compound. This equipment is driven by an AC servo motor and its toothed belt, providing free programmable oscillating motion across the entire width of the panel. There is almost no noise during the operation of this part, which greatly affects the stable operation of the equipment. When moving, the speed, width and level of the vibrating movement can be adjusted. You can also select a separate speed for each type of panel to be produced when displaying the speed status graphically on the monitor. This system ensures that the production of each panel type has a constant quantity and quality after the optimal vibration characteristic has been determined. In particular, for roofing panels with deep compartments, the vibration speed can be selected, the speed of the stirring part decreases as it moves through the deep compartments. In this case, more foam is applied (poured) to the deep sections to prevent differences in density, as well as to prevent the panel from sticking together. Double belt conveyor system --- 24m: The PU component mixture applied to the bottom coating layer is transferred inward and synchronized with the facing layer across the double-sided panel for activation. This device is the most basic part and plays a key role in ensuring that the sandwich panel meets the highest standards. plays This equipment is mainly composed of a driving motor, upper and lower slats, a hydraulic cylinder containing increased pressure, and a side panel and side block to prevent PUR. The most important parts of this device are the lamellas, which require precise metal processing requires the most precise degree of equality and change of process and units. Lateral sealing chains on both sides seal the foam and contain the lateral pressure of the foam. Because PU foaming pressure is very high, multiple hydraulic cylinders are needed to control the foam. The hydraulic cylinder is designed to move the upper belt conveyor up and down for the desired panel thickness. Heating system for two-belt conveyor:   The PU adhesive spread between the upper and lower panels has excellent chemical reaction and has the ability to process at a constant temperature. This device is designed to maintain a constant temperature and provide heated air during such a process. An electric heater is the ideal power for a heater that needs to supply heated air to the upper and lower conveyors separately. There is also an automatic temperature control unit with an overheat protection device for a safe and quality panel An insulated panel is required for enclosures to maintain the overall temperature.     The side guide device is installed on the left and right side, which prevents the PU component with strong uplift pressure from being pushed out of the panel by the side blocks. When adjusting the width of the panel, it is necessary to fasten one of the two side guide devices, then the other side guide device. The two belts are transferred to the inner side of the conveyor. Side welding part: This device is designed to prevent the PU component from flowing through the stack from the side of the panel, and when the double-belt conveyor presses the PU foam and conveys the PU panel, the plastic blocks carry out this process. An automatic temperature controller with an overheat protection device should also be included. The control device for the stack of plastic blocks is synchronized with the two-belt conveyor, so they move at the same speed. Tape and saw cutting equipment for PU sandwich panels for roof:   The cutting speed must be synchronized with the panel transport. This cutting device can be controlled manually or with automatic control. The gantry is installed at the rear, and the sawing unit is located on the right side of the production line. In this case, it can also be a band saw blade. The cross cutter is designed so that the saw band can be changed, and the production stops at this time, because the change only takes 1~2 minutes. The two band line transmits the sandwich panel at a preset speed. An incremental encoder is installed on the turning shaft of the two-band conveyor. Impulses are transferred to the microprocessor control of the saw. The cut-off saw waits for a start signal based on the length of the panel and then accelerates the X-axis to maximum speed. After both speed and offset controls are synchronized, the clamps are pneumatically actuated to clamp the front and back of the panel, and then the bandsaw makes the first cut from left to right on the front. The saw blade is turned at an angle of +90. The saw unit is in motion until the second blade part is also out of the cut. The cut panel lies on an unguided roller conveyor and is pushed by the panel coming from the saw's work area. The cutting saw returns to the starting position at maximum speed and rotates approximately 180 degrees. In this case, the cutting saw waits for the next start signal (depending on the length of the sandwich panel) and the procedure described above starts again. Now the cutting direction changes from right to left. The control panel is equipped outside the housing and provides automatic cutting, the length and quantity of the panel are set by the workers. Cutting device for roof panel:    

Safety control panel and sensor                           Gas absorption system

 

Panel template for a cold room:

Panel Template for Walls--- SS Type:

Pentane storage tank system: