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The entire automobile exhaust gas purifier is mainly composed of four parts: carrier, coating, vibration damping pad and shell. The carrier is a porous, heat-resistant solid material that carries the active ingredient. At present, honeycomb monolithic ceramic carriers are generally used. Such carriers are formed by cordierite extrusion. Its advantages are good thermal stability, strong resistance to cold and heat shocks, and low thermal expansion coefficient. The shape of the carrier generally includes a circle, an oval, a racetrack, and a circular-like irregular pattern.
The coating is to disperse the catalytic material on the carrier, including rare earth and noble metals platinum, palladium, rhodium, ruthenium and other substances. The cushion is located between the shell and the carrier. Its function is to prevent vibration and reduce stress and protect the carrier. It is designed based on pressure.
The purifier housing is the main part of the structural design. Its material and shape are important factors that affect the conversion efficiency and service life of the purifier. Because the purifier is installed under the chassis of the car, it is connected to the exhaust pipe of the engine. Because the exhaust gas contains water vapor, it is susceptible to corrosion. In order to avoid being corroded, at present the outer shell material mostly uses the stainless steel that contains Ni, Cr or cold-rolled board to immerse aluminum surface. The design of the shape of the shell requires that the turbulence and airflow separation of the airflow through the purifier be reduced as much as possible to prevent the increase of airflow resistance. Pay special attention to the shape design of the intake front cone to ensure the uniformity of the intake flow to increase the conversion efficiency and service life. In order to enhance the strength of the shell and prevent deformation, it is considered to provide concave and convex ribs on the shell.
cheap plastic injection molds and mould manufacturer 1-Start from part design analysis 2-Mold design drawing and DFM report available so you can see how is the mold going to be before mold making 3-If product is complex,moldflow report will be present as well 4-In house mold making shop ensure you mold quality under well control. 5-Normally it takes 20-40 days to make mold,precise time depends on part design
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