两极控制图在注塑瓶盖壁厚控制中的应用  

Application of Control Chart in Wall Thickness Control of Injection Molded Caps

作　　者：张玲利[1] 吴大鸣[1] 张丽蕾[1] 

机构地区：[1]北京化工大学塑料机械及塑料工程研究所,北京100029

出　　处：《塑料》2005年第4期85-89,共5页Plastics

摘　　要：针对注塑瓶盖壁厚控制的特点,介绍了统计过程控制(SPC)中的均值-极差(x-R)控制图在塑料瓶盖壁厚控制中的局限性,将两极(L-s)控制图与均值-极差控制图进行了比较,阐述了两极控制图在塑料瓶盖壁厚控制中的优越性,论述了两极控制图的构造原理和控制限计算方法,提出了两极控制图在注塑瓶盖壁厚控制中的应用,并在对两极控制图分析的基础上,对注塑成型的过程能力进行分析和改善。Based on the characteristics of wall thickness of injection molded caps, the application of L-s control chart in wall thickness of injection molded caps is discussed. The limitation of ^-x-R control chart for application in wall thickness of injection molded caps is described when it compares with the L-s control chart. Moreover,it illustrates in detail how the L-s control chart can be performed in the wall thickness of injection molded caps and the merits of the L-s control chart in wall thickness of injection molded caps. On the basis of the L-s control chart,the capability of the injection process is analysed and some good suggestions for the improvement of the capability of the injection process are provided.

关 键 词：统计过程控制(SPC) 两极控制图(L-s控制图) 均值-极差控制图(^-x-R控制图) 注塑成型 瓶盖壁厚 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]