In the cold winter, the owner will notice that the cold flow is directly immersed in the car, occasionally accompanied by wind noise, and it feels like the door is not tight. Then at this time you have to check the seal. The sealing strip improves air tightness and prevents wind and rain from entering the compartment. Once the weathering of the sealing strip breaks, it will cause the cabin to leak, increase the driving wind noise of the car, and the rain will easily corrode the body. It is not difficult to see that for the car, the sealing strip is an important part, and it must be regularly maintained and inspected. Nowadays, there are many shops for professional vehicle sealing, which are tailor-made for different models, accurately matching the slope of the original car curve and the curvature of the curve, ensuring the continuity between the various parts of the body, avoiding the separation of the airflow at the joint, and easily dissolving the periodic tail. The flow can reduce the wind noise at high speed and enhance the air tightness and dustproof ability of the original car.
Seal several key positions
Before installing the glass, the doors and windows of the vehicle should carefully remove the debris in the slot, such as mortar, brick scraps, wooden blocks, etc. When the glass is placed, it should be carefully centered to ensure uniform clearance on both sides, and it is fixed in time to prevent collision and displacement. Deviate from the center of the slot. The rubber sealing strip cannot be pulled too tightly, and the length of the blanking is 20-30 mm longer than the assembly length. It should be set in place during installation, the surface is straight, and it is in close contact with the glass and glass slot, so that the surrounding force of the glass is evenly distributed. At the corner, the rubber strip should be beveled off and glued firmly at the break. When sealing the glass with sealant, the glass should be squeezed with rubber strips or rubber blocks to leave a gap of glue injection. The depth of glue injection should be no less than 5mm. Before the glue is cured, the glass should be kept from vibration.
Front sealing, trailing edge and side edge sealing of the vehicle: The hood is supported, and the front edge, the trailing edge and the side edge of the hood are pasted to the anastomosis part of the vehicle body, so as to effectively seal the gap between the hood and the vehicle body. During the running of the vehicle, the passage of air from the intake grille can be accelerated to improve the heat dissipation performance. At the same time, the friction between the hood and the front part, the left and right front fenders can be reduced, and the noise caused by bumps and friction can be reduced. If the gap is large, you can paste two layers.
By sealing the gap between the four doors and the vehicle body, the sealing performance of the vehicle can be effectively improved and the wind noise can be reduced. The improvement of sealing performance can also prevent dust and rain from entering the cockpit and improve the air conditioning refrigeration efficiency. Carefully apply special glue to the inside of the door, apply special glue to one side of the cut seal, and then stick the seal on the inside of the door.
Pasting around the skylight can effectively improve the sealing performance, dustproof and waterproof; wrapping the air conditioning and refrigeration pipeline can improve the cooling efficiency. There is a gap between the interior panel and the door. There are often frictions between the instrument panel, the storage box and other interior parts in the car due to assembly and machining accuracy. The vehicle will resonate at different speeds during driving. , producing annoying noise, which is generally difficult to find. In fact, we know the reason, just fill and paste these gaps with a sealing strip.
When repairing a door with a sealing flange, care should be taken to repair the damaged sealing flange and accurately restore the shape of the original flange. Sealing inspection should be carried out after repairing the door. The inspection method is: put a piece of cardboard on the sealing position, close the door, and then pull the paper to judge whether the sealing is good according to the magnitude of the pulling force. If the force required to pull the paper is too large, the seal is too tight, which will affect the normal closing of the door, and will also cause the seal to lose its sealing performance due to the deformation of the oversized surface; if the force required to pull the paper has passed Small, indicating poor sealing, there is often a phenomenon that the door does not block the wind. When replacing the door, be sure to pay the edge glue at the inner and outer plate flanges of the new door, and block some of the holes left in the stamping with the base tape.
Pay attention to several places of sealing when repairing a car
After the window glass is damaged, replace the glass with the same curvature as the original window glass, and check the glass guide groove and the sealing strip for damage. Since the window often fails to return to its original shape after being repaired, in addition to ensuring that the window glass can be easily pulled or lifted, attention should be paid to the sealing around the window glass after the window is closed. If the gap between the glass and the glass slot is not uniform, the rubber strip is in poor contact with the glass and the glass groove, and the glass slot is protruded, and the sealing strip can be easily pulled off by hand.
When changing the roof, first apply a layer of conductive sealant at the press-fit around the roof. After welding, apply the folded edge glue in the flow tank and at the joint. This will not only help the body seal. It also prevents the car from causing early rust due to water accumulation at the flange weld.
When replacing the entire body, in addition to the above items, a layer of sealant should be applied to the lap joints and welds of the weld. The thickness of the layer should be about 1 mm, and the glue layer should not be viscous. Defects such as bubbles; special folding edges should be applied at the hem; 3mm-4mm elastic coating and anti-corrosion coating should be applied on the lower surface of the floor and the lower surface of the front wheel cover; these measures can not only greatly enhance the whole The car's tightness and slow down the body's rust rate, but also greatly improve ride comfort.
Daily maintenance needs to be in place
The first is to check the seal for large cracks and cracks. If the seal is broken or has large cracks, it can be repaired with an adhesive. In particular, it is easy to fill a large crack strip by using a special adhesive for the seal. Of course, if the seal is seriously damaged or has a large degree of aging, it is best to replace it with a new one. Sealing strip replacement is not difficult, but if you want to do better, it is best to ask a professional.
The daily maintenance work of the sealing strip mainly includes the following items. The first is to use a car detergent to clean, after cleaning, a layer of high permeability protective agent is applied to prevent the seal from aging. In addition to this, the gap between the seal strips is easily filled with dust and rust. To this end, the dust should be removed with a brush.
The sealing strip is an important part in the door and window. It is a powerful measure to ensure the airtightness, watertightness and sound insulation of the door and window. At the same time, it is a reliable guarantee for the safety of the glass in the door and window after being subjected to external force. Since the sealing strip is affected by the weather and sunlight, it will shrink, age and deform. Therefore, the sealing strip is not allowed to work under tension and should be kept free. In order to tightly clamp the glass, the sealing strip is often pulled too tight during the installation process, and the free state is not ensured, so that it is in a state of tensile deformation. Practice has proved that due to the installation of the sealing strip in the state of tensile deformation, the sealing strip has been detached, broken, cracked and the like. For this reason, at the time of installation, the length of the sealing strip is longer than the fitting side of the door and window. The bevel is broken at the corner, and it is firmly adhered with the adhesive, leaving sufficient expansion allowance.
