A new die structure for the semi-hollow Al-profiles was presented. Through a practical example, the die structure named protection type of flow-guided die was introduced. The composition of the structure and the selection of structure parameters were analyzed in detail. And the method of checking the die strength was introduced. The characteristics of the new structure were simple and easy to process. The practical application shows that the die structure can enhance the strength and prolong the life of the die. It is worth promoting. The purpose is to extend the experience and the new die structure, Provide reliable and valid reference data to the designers.
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