针织物冷轧堆染色收卷张力设计

为解决冷轧堆染色收卷过程中因缝头而导致的染色色差问题，以针织物为研究对象，分析缝头印产生机制，利用厚壁筒原理和数值迭代计算方式，对针织物的收卷过程进行力学分析，建立针织物收卷张力数学模型。分析等张力收卷和锥度收卷下，剩余缠绕张力值和径向压力值的变化曲线，以控制缝头印为目标，兼顾针织物的卷形，建立幂函数收卷张力模型。研究表明：幂函数收卷方式下的径向压力值远小于等张力收卷和锥度收卷，且幂函数的指数越小，剩余缠绕张力分布越均匀，径向压力值越小，有利于控制缝头印的产生，获得高质量染色织物，为针织物冷轧堆染色机的张力设计提供参考。

Knitted fabric winding tension of cold pad batch dyeing

In order to solve the problem of dyeing color difference due to seam allowance during cold pad batch dyeing,focused on knitted fabric,the paper analyzed the reasons for the formation of seam allowance imprint,used the theory of thick wall tube and iteration law to analyze the force of knitted fabric in the process of winding,and established a mathematical model for the winding of knitting fabric.The paper analyzed the values of residual tension and radial pressure under constant winding tension and taper winding tension,and established the model under power function winding tension taking the control of seam allowance imprint as the goal and accounting for the roll shape of knitted fabric.It is concluded that the radial pressure under power function winding is much smaller than the constant tension and taper winding,and the smaller exponent of the power function,the more uniform distribution of the residual tension,the smaller radial pressure,which is conductive to the control of seam allowance imprint to obtain high quality dyed fabric,providing the reference in the design of winding tension for cold pad batch dyeing of knitted fabric.