[China Aluminum Network] We all know that extrusion dies work under very harsh conditions. High temperature, high pressure, and high-strength friction cause the life of extrusion dies to be relatively short. The main failure mode of the extrusion die is wear failure. During the extrusion process, the aluminum profile is brought into contact with the working belt through high temperature and high pressure, resulting in a strong frictional force that causes the surface of the extrusion die cavity and the working belt surface to wear out and fail. And mold cracking failure. In the aluminum production process, after a certain period of time, the extrusion die will produce fine cracks at weaker places, and will gradually expand to depth as production continues, and cracking or fracture will occur when it reaches a certain level. Deformation failure, generally occurs in the use of the mold cantilever eccentricity, sagging situation. It may be due to its lack of strength or other reasons. In view of the above problems affecting the life of the mold, attention should be paid to the following aspects in the design, manufacture, and use and maintenance of the porous mold: The design of the porous mold must pay attention to the placement of the shunt hole. Since there are many bridge locations, it is necessary to rationally layout the perfect pressure relief. During the manufacturing process, special attention should be paid to the weak areas and places where stress is concentrated.
The maintenance of the porous extrusion die must first solve the problem of the length of the material to be discharged, and try not to move the belt or weld during the repair of the die. It is better to adjust the flow of the deflector or the welding chamber to achieve the repair of the die. Maintain the stability of the extrusion die. It is necessary to clean the porous moulds. Many corners and subtle areas where there are many difficult to polish and polished by hand are generally used to polish the surface with a sandblasting machine.
The nitriding treatment should be carried out immediately after the extrusion die is passed, so that the surface of the extrusion die can be strengthened to better cope with aluminum production. In the production of aluminum profiles, it is necessary to avoid frequent up and down movements of the mold and to reduce the overall performance of the mold as much as possible due to quenching and heating. Extruding the mold is also very important for maintenance. It must be cleaned and sprayed with anti-rust agent before entering the mold.
From the above, it is an integrated system project to properly increase the life of a porous mold. It is necessary to implement a comprehensive mold tracking control system to achieve this.
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