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Proceedings Paper

Recent progress in online ultrasonic process monitoring
Author(s): Szu-Sheng L. Wen; Tzu-Fang Chen; Demartonne Ramos-Franca; Ky T. Nguyen; Cheng-Kuei Jen; Ikuo Ihara; A. Derdouri; Andres Garcia-Rejon
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Paper 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.

Paper Details

Date Published: 15 March 1998
PDF: 9 pages
Proc. SPIE 3399, Process Control and Sensors for Manufacturing, (15 March 1998); doi: 10.1117/12.302544
Show Author Affiliations
Szu-Sheng L. Wen, McGill Univ. (Canada)
Tzu-Fang Chen, McGill Univ. (Canada)
Demartonne Ramos-Franca, McGill Univ. (Canada)
Ky T. Nguyen, National Research Council Canada (Canada)
Cheng-Kuei Jen, National Research Council Canada (Canada)
Ikuo Ihara, National Research Council Canada (Canada)
A. Derdouri, National Research Council Canada (Canada)
Andres Garcia-Rejon, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 3399:
Process Control and Sensors for Manufacturing
Richard H. Bossi; David M. Pepper, Editor(s)

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