Increasing die land length can also help because it reduces swell.
增加口模流动长度也有帮助，因为它减少了出口膨胀。
The effect of major parameters of die structure on metal flow velocity is integrated and the mathematical model of design and calculation of aluminum profile extrusion die land length is derived.
并综合主要模具结构参数对金属流动速度的影响，建立了铝型材挤压模模孔工作带设计计算的数学模型。
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