三棱柱全啮型挤出机混合元件几何学研究

Geometric Study on Fully Wiped Triangular Prism Mixing Components for TwinScrew Equipment

探讨了一种用以解决新型玻璃纤维增强材料的加工问题的双螺杆挤出机用三棱柱全啮合混合元件,阐释了元件全啮合原理,提出了一种偏心设计方法,使元件能获得更好的混合效果以及更好的互换性,且明确了偏心距与螺筒半径的取值范围为0~0.423。再根据几何学原理详细分析了此种元件的几何性质,推导了设计参数与混合腔体积的表达式,并用数值拟合的方法简化了表达式以应用于实际设计,最后通过对混合曲面法线分析,得出了输送能力与元件螺旋参数的关系,发现当螺旋参数在2~8之间取值时能既能保持良好的混合效果又能有较好的输送能力,为此元件的设计制造及混合实验提供了必要的理论准备。

This paper explores a full-mesh triangular prism mixing element for twin-screw extruders to solve the production process problem of new glass fiber reinforced materials,explains its full meshing design theory,and proposed an eccentric design method which makes the component have better mixing effect and better interchangeability,and it is clear that the range of eccentricity and screw radius is 0~0.423.Then the geometric properties of the components are analyzed in detail according to the geometric principle.The expressions of the design parameters and the volume of the mixing cavity are derived.The numerical fitting method is used to simplify the expression to be applied to the actual design.Finally,the analysis of mixed surface normal shows the relationship between the conveying capacity and the component spiral parameters,and gives that the reasonable range of parameter selection is 2~8 which can not only maintain good mixing effect,but also have better conveying capacity.The necessary theoretical preparations are provided for the design and manufacture of the component and the hybrid experiment.