Application of ultrasonic measurement technology in polymer precision injection molding processing

This thesis introduces quality control factors on polymer precision injection molding, discusses the control principle of precise injection molding machine and proposes an approach of using ultrasonic wave to conduct real time on-line measurement of melt density and applying the density to feedback control the injection weight. This approach can significantly improve the repeated precision of the injection weight of the injection molding machine. It also explores the feasibility and approach of using the ultrasonic measuring technology to conduct on-line measurement of melt density with reference to the characteristics of ultrasonic measuring technology.