ã€China Aluminum Industry Network】Construction process of double-sided aluminum foil composite air duct insulation material 1. Plate blanking, forming (1), aluminum foil composite heat insulation air duct four wall panels can be cut by a whole board 3 90 ° gap, 2 The 45° edge is made by folding and gluing. It can also be made of two pieces of whole plate, four pieces of whole plate cut, and cut edges.
(2) Plate thickness 20mm, plate width 1200mm, length 4000mm; when the length of the long side of the air duct is less than or equal to 1160mm or the sum of the sides of the air duct is less than or equal to 1120mm, or the sum of three sides (four sides length) is less than or equal to l080mm (1040M) At the time, the air duct can be made of 4m per section according to the length of the board to reduce the pipe section interface.
(3), duct sheet can be spliced. When the length of the long side of the air duct is less than or equal to 1600mm, it can be directly bonded at an angle of 45°. After bonding, double-sided aluminum foil tape will be applied at the seam; when the length of the long side of the air duct is greater than 1600mm, the panel must be "H "Special-purpose connector bonding, to enhance the strength of the splicing.
(4) The three-way and four-way ducts of the air duct should be separated or bifurcated; the elbows or tees of the elbow, the three-way, the four-way, and the round or polygonal line of the head should be equally symmetrically scribed. Each pipe section of a composite duct (including pipe fittings such as tee, elbow, etc.) should be parallel at both ends and perpendicular to the pipe centerline.
(5) Mechanically bending and forming the arc surface of the air pipe elbow. When the radius of the inner arc is less than 150mm, the rolling distance should be 20-35mm; when the inner radius of the arc is 150-300mm, the 4L pressure spacing should be Between 35~50mm, when the internal arc radius is greater than 300mm, the rolling distance should be between 50 and 70mm. Rolling depth should not exceed 5mm.
(6) The distance bend pipe shall adopt inner and outer concentric arcs or inner and outer concentric fold lines. The radius of curvature shall be one plane side length; when other types of bend pipes (inside and outside right angles, inside oblique lines outside right angles) shall be adopted, the length of the plane side When more than 500mm, bent composite air duct deflector should be installed. The number of baffles is determined by the length of the side of the plane; when the looomm>5>500mm, one is set and set at b/3 from the inner side. Two pieces are set when 1500mm5> 1000mm; 3 pieces are set when 6 is larger than 1500mm, and the position of the guide plate is set: the first piece is B/2, the second piece is b/4, and the third piece is b/8 Department.
(7) The guide vane can be made of Pvc shaped products, or it can be bent into circular arcs by galvanized plates, with both ends flanging, riveted to two parallel upper and lower connecting plates (the connecting plate can also be cut from galvanized plates) ) Make up the deflector group. The installation position line is drawn on the well-formed elbow plane board. When the elbow is combined, the deflector group is glued together with the adhesive. The height of the deflector group should be 2 mm for the large dry elbow to make it more tightly connected.
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