Improving Profits And Part Quality Through The Use Of New Plastics Flow Analysis (PFA) Software

摘要

This article will illustrate how the use of new, easy-to-use plastics filling analysis (PFA) software was used to assist in finding solutions to two troubled precision injection molded parts with similar problems related to unacceptable flatness of key features. With each of these projects, flow analysis was not implemented until late in the project after the tool construction was completed and many trial-and -error attempts were made in attempts to correct the problems. When flow analysis was implemented, the source of the problem was quickly identified and improvements to the design were made. In both cases, the parts were then accepted on the first molding trials.The first part was a pen barrel, molded in ABS, which had a problem related to the proper formation of a critical internal thread feature on a inner wall of a thick section (see fig 1.). The second part, a component of a clear disposable medical device, molded in PMMA, contained a unacceptable distorted wall at a optical inspection site (see fig. 6 and fig. 7).