摘要：The importance of extrusion die with multi-cavities was elaborated. Through an actual case. A new structure for the semi-hollow Al-profiles was introduced. The structure named substituted type to solve the cantilever strength was presented. And the selection and the optimization of structure parameters were described in detail. Including the determination of extrusion machine ability, the layout for the die holes, the use of computer simulation software for analysis and comparison to determine the arrangement of portholes, the structure of chamber in female die, the selection of bearing etc. It was shown that the structure with twin cavities for semi-hollow profiles is effective, the structure can greatly improve the production efficiency and reduce the cost. It is worth promoting. The purpose is to provide reliable data and reference for the further research and development of this technology on the extrusion die with multi-cavities in a die.
