There are many factors affecting the quality of precision mold parts, such as the type and quality of die casting machine, the rationality of the geometry and technical requirements of the die casting, the structure of the mold and the technical level of the operators. If you are sure, you can leave less cutting allowance to extend the life of high-quality precision mold parts. Here are some detailed factors that affect the quality of precision mold parts?
1, the rationality of the design of the accessories
Designers should first fully understand the user's use requirements and working conditions, die casting force, and then select the appropriate materials according to the use requirements and working environment to understand the material die casting performance. In the design of precision mold parts, special attention should be paid to the premise of meeting the requirements of use, and the die-casting structure should be as simple as possible. The wall thickness is properly uniform and leaves the necessary mold slope, which may cause defects such as pits, pores, shrinkage, under-pressure, tensile marks, cracks, deformation, etc. on the casting. The requirements for dimensional accuracy of castings should be reasonable, otherwise it will bring unnecessary troubles to mold design, mold processing, process condition formulation and management, and will cause a large number of unqualified products.
2, mold structure, processing accuracy and mold material selection
Die casting is closely related to the quality of products such as die casting, mold design, processing, and mold material selection. The mold structure is unreasonable, and it is difficult to make the product qualified if the precision mold parts are taken from the process. In addition, mold materials, mold processing precision, surface roughness, processing marks, heat treatment cracks, nitride layer thickness and mold assembly of heat-resistant and wear-resistant precision mold parts all affect product quality and mold life.
3, the shrinkage rate of the accessories material
The shrinkage of the cast material, generally in the form of an average percentage or a percentage of a certain change, usually selects the average shrinkage of the material. For high-precision die-casting parts and mold design of precision mold parts, special attention should be paid to the selection of material shrinkage. If necessary, the mold can be tested first, the required data can be obtained in the test mold, and then the large mold can be designed and manufactured. Production quantity.
All in all, the development and implementation of the die-casting process for precision mold parts is related to the quality of the molds, die-casting equipment, and the technical level of the operators. Under the existing conditions of domestic die-casting equipment, it is difficult to achieve stable, reliable and precise control of the precision mold parts process parameters. Achieving a basic control process is the process of combining and applying elements such as equipment, materials, and molds.
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