As we all know, extrusion dies work under extremely harsh working conditions. High temperature, high pressure and high-strength friction make the die life shorter. The main failure mode is wear failure, the profile is in direct contact with the working belt through high temperature and high pressure during the extrusion process, thereby generating a strong friction force, so that the surface of the cavity and the surface of the working belt are worn and fail. Cracking fails. In the actual production process, after a certain period of service, the mold will produce small cracks in some weaker places, and gradually expand to the depth as the production continues. When it reaches a certain level, it will crack or break. . Deformation failure is generally caused by the eccentricity and sag of the cantilever during use.

may be caused by insufficient strength or other reasons. In view of the above-mentioned problems that affect the life of the mold, the following aspects should be noted in the design, manufacture, use and maintenance of the porous mold: the design of the porous mold must pay attention to the placement of the shunt holes, because there are many bridges, it is necessary to rationally arrange the perfect pressure relief. Special attention should be paid to the weak parts and the places where stress is concentrated during the manufacturing process.

In the maintenance of porous molds, the first problem to be solved is the length of the discharge material. In the repair process, try not to move the work belt or welding. It is best to adjust the flow of the deflector or the welding chamber to achieve a good repair. This can better maintain the stability of the mold. It is quite necessary for the efficient cleaning of porous molds. There are many corners and subtle places that are difficult to polish and polish by hand. To this end, our company uses a polishing sandblasting machine to clean its surface.

Nitride treatment is carried out as soon as the mold is qualified, so that the surface is strengthened to better cope with production. In the production process, try to avoid the frequent loading and unloading of the mold, as much as possible to reduce the overall performance of the mold due to the sudden cooling and sudden heat. The later maintenance of the mold is also very important. Before entering the warehouse, it must be clean and sprayed with rust inhibitor. From the above point of view, it is a comprehensive system engineering to properly increase the service life of the porous mold, and it must be implemented to implement a comprehensive mold tracking tube control degree.

In short, the ultimate success of the porous mold relies on a set of links. Any negligence in any link cannot maximize the effectiveness of the porous mold. At this point, we must strengthen the perfect connection between processes. At the same time, we should continue to develop more, newer and better measures to improve the life and efficiency of porous extrusion molds based on our existing experience.