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Working principle and design process of dry powder pressing fuse mold

Mar 11, 2019

Working principle and design process of dry powder pressing fuse mold

The dry powder pressing fuse mold is to put the powder mixture into a steel stamper, pressurize the powder by die punching, and after the pressure is released, the compact is taken out from the female mold to complete the molding process. Give full play to the process characteristics of powder metallurgy, no cutting and near forming, to ensure the blank meets three basic requirements of geometry, size, precision, surface roughness, density and distribution, whether it is pressing die or finishing die. This is required for composite molds and forging dies.


Among them, especially the density and distribution of pressed blanks and forged blanks are the main technical indicators in the mold design; reasonable design of dry powder pressed fuse mold structure and selection of mold materials, so that the mold parts have high enough strength, stiffness and hardness It has high wear resistance and service life to meet the requirements of safe, reliable and easy operation of high-pressure working containers. At the same time, attention should be paid to the machinability and interchangeability of mold structure and mold parts, and reduce the manufacturing cost of molds.


When designing dry powder pressing fuse molds, first understand and master the relevant design materials as an important basis for mold design; secondly, material design and process design according to product requirements, compact design or preform design according to product drawings, and Select the press and pressing method to design a sketch of the mold structure.


Based on the size of the blank, taking into account the dimensional changes in the process, calculate the size of the main mold parts, generally calculate the size directly related to the cavity, and then calculate the dimensions of other mold parts according to the mold assembly relationship; Assembly drawings and parts drawings, according to the different working requirements of various types of molds, dimension deviation and shape tolerance, and select mold materials and technical requirements.