Extrusion Profile Geometry Measurement Methods and Case Studies

This paper introduces new technology for on-line dimensional measurement of profile extrusions using sheet-of-light laser triangulation methods. The technology is described and contrasted with prior technologies. Case studies are presented that demonstrate the ability of the technology to detect problems normally encountered in profile extrusion such as dimensional changes due to batch change, feeder interruption, irregular upsets, and periodicity. Startup behavior is also explored. The paper concludes that many dimensional problems in profile extrusion can be easily recognized with on-line monitoring.