Recent progress in on-line ultrasonic process monitoring

被引：8
|
作者：
Wen, SSL [1 ]
Chen, TF [1 ]
Franca, DR [1 ]
Nguyen, KT [1 ]
Jen, CK [1 ]
Ihara, I [1 ]
Derdouri, A [1 ]
Garcia-Rejon, A [1 ]
机构：
[1] McGill Univ, Dept Elect Engn, Montreal, PQ H3A 2A7, Canada
来源：
PROCESS CONTROL AND SENSORS FOR MANUFACTURING | 1998年 / 3399卷
关键词：
D O I：
10.1117/12.302544
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
On-line ultrasonic monitoring of polymer co-extrusion and gas-assisted injection molding are presented. During the coextrusion of high density polyethylene (HDPE) 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 thermocouples. 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.
引用
收藏
页码：122 / 130
页数：9
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