此剪切訴率的計算公式可以下式來表示: SR = (D x N) / h, 式中 SR = 剪切速率(Shear Rate) D =螺桿φ(screw diameter) N = 螺桿轉速(rate of screw rotation) h = 螺桿溝槽深度(depth of channel)一般塑料的平均剪切速率(shearrate)值約為150ft/min (ab.760mm/s),但是每種塑料都有一個特定的最大剪
Gordon G, Kazmer DO, Tang X, Fan Z, Gao RX (2015) Quality control using a multivariate injection molding sensor. Int. J. Adv. Manuf. Technol., 78:1381–1391.