ã€China Aluminum Networkã€‘1The surface of metal doors and windows is clean, smooth and smooth without burrs. The steel doors and windows are free of welding slag, welding burrs, and hammer marks; the coating, coloring, galvanized layer or anti-rust paint is uniform, non-corrosive, and large There should be no scratches or bumps; products with defects such as distortion, loose joints, surface damage, and attachment defects should be excluded. The outer surface of metal and plastic door and window frames is covered with a protective film to protect the surface layer.
2 The thickness of the material used for metal doors, windows, extensions, handles and other accessories shall meet the standards to ensure the rigidity requirements; the size of the fan is exactly the same, and the overlap between the fan and the frame is not less than 2mm; the position of the hinge should be accurate Consistently, the upper and lower hinge axes are on a vertical line, the gap on one side of the hinge is 0.6-lmm, and the gap on one side of the hinge is not larger than 2?; the underside of the window frame is full of welds on both sides; The iron foot holes shall not use long-round, round iron foot holes; each window shall be provided with a drainage hole at the lower frame; at the upper end, there shall be a water-drawing board at the waist-window; .
The cross-section of the aluminum alloy profile for windows and doors shall meet the design requirements. In general, the wall thickness shall not be less than 1.4mm. The aluminum profile wall thickness of aluminum alloy doors shall not be less than 2.0mm to ensure the required rigidity; the hardware and other components of the aluminum alloy doors and windows shall be used. Accessories must comply with the relevant specifications and design requirements, generally should be used stainless steel, light metal or other surface treated materials; aluminum alloy oxide film should meet the requirements of AAl0 level above, the film layer is firmly bonded.
Silicon Carbide (SiC) is used Quartz Sand, petroleum coke (or coal), wood chips as raw material through high temperature resistance furnace smelting made.Silicon carbide is also called moissanite. Silicon carbide is most widely used in the modern C, N, B, and other non oxide high technical refractory raw materials.Silicon carbide hardness is very high, Black silicon carbide containing SiC about 95%, its toughness is higher than green silicon carbide, most of the material used for processing low tensile strength of materials, such as glass, ceramics, stone, refractory, cast iron and non-ferrous metals, etc.
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