How to properly protect the sealing performance during car repair

How to properly protect the sealing performance when repairing the car. When repairing the car circuit, the sealing rings of all the body holes and holes should be installed in place, because these sealing rings not only play a sealing role, but also protect the mechanical seal of the wiring harness pump. . If the sealing ring is damaged or the wiring harness can rotate or move in the sealing ring, replace the sealing ring and assemble it firmly with the holes and holes of the vehicle body to stabilize the wiring harness. After the window glass is damaged, use glass with the same curvature as the original window glass, and check the glass guide groove and sealing strip for damage. Since car windows often fail to return to their original shape after being repaired, in addition to ensuring that the car window glass can be easily pulled or raised, it is also necessary to pay attention to the sealing around the car window glass after the car window is closed. When repairing a car door with a sealing flange, attention should be paid to repairing the damaged sealing flange and accurately restoring the shape of the original flange. After repairing the door, check the seal. The inspection method is: put a piece of hard paper on the sealing position, close the door, and then pull the paper to judge whether the seal is good or not according to the magnitude of the pulling force. If the force required to pull the paper sheet is too large, it means that the seal is too tight, which will affect the normal closing of the door, and it will also cause the seal to lose its sealing performance quickly due to excessive deformation; if the force required to pull the paper sheet If it is too small, it means that the seal is not good, and the door will often block the wind but not the rain. When replacing the door of the mechanical shaft seal, be sure to apply hemming glue at the flanging occlusion of the inner and outer panels of the new door, and block some small process holes left during the stamping with the base tape. When changing the roof, apply a layer of conductive sealant on the periphery of the roof, and then apply hemming glue all over the water tank and at the joints after welding. This will not only help seal the body, but also It can also prevent the body from being rusted early due to the accumulation of water at the flanging weld. When assembling the car door, paste a whole sealing isolation film on the inner door panel below the window. If there is no formed sealing isolation film, it can be replaced by ordinary plastic paper, then the sealing isolation film is pasted and compacted, and finally Production and assembly of interior trim panels. When replacing the entire car body, in addition to completing the above items, a layer of sealant should be applied to the overlapped part of the weld and the welding manifold mechanical seal. The thickness of the glue layer should be about 1mm, and the glue The layer must not have defects such as virtual stickiness and air bubbles; special hemming glue should be applied to the fold; the lower surface of the entire floor and the lower surface of the front wheel cover should be coated with 3mm-4mm elastic coating and anti-corrosion coating; on the floor The upper surface and the inner surface of the front vertical board should be pasted with sound insulation, heat insulation, vibration reduction and damping film, and then covered with insulation felt, and finally covered with carpet or decorated floor. These measures can not only greatly enhance the airtightness of the vehicle and slow down the corrosion rate of the car body, but also greatly improve the ride comfort.