Using CMM data to quantify sink marks

摘要

For years decisions have been made about the acceptability of a molded part based upon subjective assessment of attributes such as sink marks. The mechanisms that cause sink are well documented. Yet sink marks continue to be a leading cause of rejected products. This research focused on developing a repeatable measurement technique for objectively quantifying the depth of sink marks. Following preliminary investigation, a coordinate measuring machine (CMM) was employed.