Discontinuous PU Sandwich Panel Machine

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Continuous production line of rigid polyfoam PU color-steel-sided sandwich panels 1.Purpose of the line The line is used to continuously make PU-cored sandwich panels with the facing layers of steel or aluminum sheet or PU-cored sandwich panels with one side of color steel and the other side of flexible sheet. It is also able to make panels of different profiles if the roll-forming machine is changed. 2. Main technical parameters Specification of the panel 700~1000mm (width) 30~150mm (thickness) Length to be custom-made Production speed 3~8m/min Length of belt laminator 24m Max temperature of hot-air circulation 70 Dimensions of the line about 86,000×7,000×3,800mm(L×W×H) Total electrical capacity about 207kw Power of hot-air furnace 200000 kcal. 3. Constituents of the line The line is consisted of two decoilers, two hydraulic clipping machines, two forming machines, two film-covering installations, one PU foaming machine unit, one mobile injector, one pre-heating installation, one double-belt laminator, one set of plastic blocks supporting corrugation skin, one hot-air circulator, one set of side chemical stopper, one automatic cutting machine, roller conveyor, steel platform, powered roller conveyor and auto control etc.. 4. Functions of each equipment and its main parameters (1) Decoiler It is mainly consisted of decoiling mechanism, coil-loading trolley, hydraulic system, infrared measuring device and so on, which is to fix and decoil colored steel coil. The decoiling mechanism include the steel frame, spindle rotator and coil expander, etc.. Frame with plate welding structure is mainly used for supporting and installing other parts on the decoiler. Spindle is to hydraulically draw and expand steel blades so as to fix a steel coil. Spindle rotator is equipped with driving system for coil rotation. Coil-loading trolley aims to hydraulically raise a steel coil to a certain height and then move it to spindle's blades along with rails. When the coil is in position, steel blades on the spindle will be expanded to tighten it. Linear rotation speed of the spindle is usually slightly higher than panel production speed, which can be automatically controlled in real time by way of using an infrared sensor. Main technical parameters: Inner diameter of steel coil 508mm Max. coil weight 9000kg Max. Coil width 1250mm Power 4.8kw (2) Hydraulic clipping machine and film-covering installation This part easily operated is a kind of machine tool hydraulically and pneumatically to shear and cover film to steel sheet. It uses the same hydraulic station for decoiler. The clipping machine can use hydraulic force to shear colored steel sheet, which is basically made up of hydraulic cylinders, levers, upper and lower cutting blades as well as steel frame. Film-covering installation including pneumatic cylinders, gripping rubber rollers and steel supporters adopts pneumatic force to grip steel sheet and covered film lead forward by forming machine. Two such installations usable according to requirement are given, one for the top steel sheet of sandwich panel, the other for the bottom one. Main technical parameters: Max. shearing thickness 1.0mm Max. shearing width 1280mm Max.film covering width 1250mm Inner diameter of film coil 72-80mm (3) Forming machine This machine is configured in accordance with panel form drawing given (refer to the drawing). The same is used to form color-steel facings with platelike structure, welded frame and gear-chain transmission. Specification of color-steel facings for wall panels and inside roof panels: 1,000mm in width and 0.4~0.7mm in thickness. Specification of color-steel facings for outside roof panels: 1,200mm in width and 0.4~0.7mm in thickness. The unit includes: i. One set machine for top sheet forming It is put on a high platform, which is used to press and form inside roof skins and wall skins. The machine, which is infinitely speed-variable by way of changing frequency, shall be with 11 forming rollers of 75mm in diameter and with the power of 4kw and maximum forming speed 8m/min. ii. One set machine for bottom sheet forming It is installed on the ground, which is used to press and form corrugating roof skins and wall skins. As to outside roof skins, the machine shall be with 21 forming rollers of 75mm in diameter and maximum forming speed 8m/min. For wall skins, the infinitely speed-variable machine shall be with 11 forming rollers of 75mm in diameter and with the power of 7.5kw and maximum forming speed 8m/min. (4) Hi-pressure PU foaming machine unit and material-supplementing installation (not applicable for explosive or flammable foaming agent such as pentane)

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China Sanxing Machinery Manufacture and Project Co

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