Extrusion mold classification
According to billet temperature, there are three kinds of extrusion: hot extrusion, cold extrusion and warm extrusion.The extrusion when the metal blank is above the recrystallization temperature (see plastic deformation) is hot extrusion.The extrusion at room temperature is cold extrusion.The extrusion above the normal temperature but not exceeding the recrystallization temperature is a warm extrusion.According to the plastic flow direction of the blank, extrusion can be divided into: positive extrusion in the same flow direction as the pressure direction, negative extrusion in the opposite flow direction as the pressure direction, and compound extrusion in both positive and negative flow directions of the blank.
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