Recent progress in online ultrasonic process monitoring

Szu-Sheng L. Wen; Tzu-Fang Chen; Demartonne Ramos-Franca; Ky T. Nguyen; Cheng-Kuei Jen; Ikuo Ihara; A. Derdouri; Andres Garcia-Rejon

doi:10.1117/12.302544

15 March 1998 Recent progress in online ultrasonic process monitoring

Szu-Sheng L. Wen, Tzu-Fang Chen, Demartonne Ramos-Franca, Ky T. Nguyen, Cheng-Kuei Jen, Ikuo Ihara, A. Derdouri, Andres Garcia-Rejon

Author Affiliations +

Proceedings Volume 3399, Process Control and Sensors for Manufacturing; (1998) https://doi.org/10.1117/12.302544
Event: Non-Destructive Evaluation Techniques for Aging Infrastructure and Manufacturing, 1998, San Antonio, TX, United States

Abstract

On-line ultrasonic monitoring of polymer co-extrusion and gas-assisted injection molding are presented. During the co- extrusion of high density polyethylene and Santoprene ultrasonic sensors consisting of piezoelectric transducers and clad ultrasonic buffer rods are used to detect the interface between these two polymers and the stability of the extrusion. The same ultrasonic sensor also measures the surface temperature of the extruded polymer. The results indicate that temperature measurements using ultrasound have a faster response time than those obtained by conventional thermocouple. In gas-assisted injection molding the polymer and gas flow front positions are monitored simultaneously. This information may be used to control the plunger movement.

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Szu-Sheng L. Wen, Tzu-Fang Chen, Demartonne Ramos-Franca, Ky T. Nguyen, Cheng-Kuei Jen, Ikuo Ihara, A. Derdouri, and Andres Garcia-Rejon "Recent progress in online ultrasonic process monitoring", Proc. SPIE 3399, Process Control and Sensors for Manufacturing, (15 March 1998); https://doi.org/10.1117/12.302544

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