the extruded aluminum bar is more and more uniform with the increase of the extrusion rate. However, when it is increased to 40 mm / s, the influence on the temperature field in the longitudinal direction will be more It can be said that there is a critical value of squeezing speed on the temperature field of spray cooling of flat aluminum extrusion profiles. The critical value is 40 mm / s at this time. If the squeezing speed is less than the critical value, The influence of the field is larger, but if the squeezing speed is greater than the critical value, its influence on the temperature field is getting smaller and smaller.
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