1, cavity wax injection
into the cavity wax injection is an amount of liquid wax underbody four cavity, through a particular process so that the left inside the body cavity wax wax to form a uniform protective film, so that no gap can drop into, the vehicle to ensure a good corrosion resistance.
after auto body made out in, to be subjected to five to ten years or even longer test, during which the environment may be very bad. Rust (oxidized) is a basic chemical properties of many metals, will occur slowly at room temperature, in particular a steel material commonly used in automotive, once rust, iron oxide resulting adsorbed water molecules in the air, causing more serious rust. From the material sense, as long as the steel, we would not be able to avoid rusting. Galvanized steel can not completely prevent rust.
car rust treatment focused on the vehicle body. Body in the manufacturing process is referred to as “body in white.” BIW in the manufacturing process, the use of “cathodic electrodeposition coating” rust treatment performed, but this does not prevent corrosion of the lumen.
Many of the vehicle body cavities which is important for increasing the strength and reducing the body weight of the vehicle body, in the conventional anti-rust coating process, these cavities are unable to process. To prevent such galvanic corrosion occurs from the interior cavity, the art technique invented cavity wax injection.
In the manufacture of components having a cavity generally has to stay well in advance wax injection hole. Wax injection orifice is generally small. In this part of the stringer, there is no specific openings, but rather injection at the top stringer. BIW elapsed after welding, after performing the basic anti-rust treatment, the process proceeds to the injection of wax. A wax injection process is started by blowing hot air, typically at a temperature at this time is about 85 degrees higher than the temperature at which hot wash. After the completion of the whole body is heated, the wax is dedicated lumen rust heated to 115 degrees, with a special wax injection pump to the injection hole has been left previously melted wax, and to maintain a certain period of time to allow excess liquid wax flows out automatically. The final thickness of the wax film is about several hundred micrometers. And then into the cooling zone with cold wind to room temperature. Finally, all wax injection hole sealed all.
cavity wax injection development in China
Volkswagen is the first company to introduce the airCar manufacturers cavity wax injection technology. Injecting the body cavity with wax 120 kg, after a certain time, the last remaining one kilogram of wax in the vehicle to form a uniform protective film on the cavity surface.
At present the domestic brands, Chery also introduced a cavity wax injection technology, its new A3 model that is using this technology to produce the body, we won a lot of word of mouth in the domestic brands.