一、引言导柱、导套是塑料模具中的主要部件。除成形平板型塑料件的模具以外,其他模具都要使甩由导柱、导套组成的导向装置来保证动模与定模的对合问题。由于动模与定模之间不断作相对活动,所以导柱与导套必须有一定的间隙。但在塑料模具的实际应用中,尤其是在卧式注塑机上应用的模具,由于动模的自重作用,使导柱、导套作单面摩擦的相对运动。即一边间隙等于零,另一边间隙是导套孔径D减去导柱轴径d的值。显然,这种相对运动对模具有 I. Introduction Pillar, the guide sleeve is the main part of the plastic mold. In addition to shaping the flat plastic parts of the mold, the other molds should be thrown by the guide column, guide composed of guide to ensure that the dynamic mode and fixed mode of the problem. As the moving mold and die constant relative to the ongoing activities, so the guide column and guide sleeve must have a certain gap. However, in the practical application of plastic mold, especially in the horizontal injection molding machine mold, due to the role of the dynamic mode of self-weight, so that the guide column, guide sleeve for the relative movement of single-sided friction. That side of the gap is equal to zero, the other side of the gap is the guide hole diameter D minus the guide shaft diameter d value. Obviously, this relative movement of the mold