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A new infrared pyrometer for polymer temperature measurement during extrusion moulding

Authors
Journal
Infrared Physics & Technology
1350-4495
Publisher
Elsevier
Publication Date
Volume
46
Identifiers
DOI: 10.1016/j.infrared.2004.03.002
Keywords
  • Plastics Processing
  • Instrumentation
  • Optical Sensing
Disciplines
  • Physics

Abstract

Abstract We describe a novel two-wavelength infrared system that we have developed for the on-line measurement of the temperature profiles of extruded polyethylene terephthalate (PET) microfibres. The key feature of the developed system is the use of two specific wavelengths that correspond to fundamental absorption bands of PET. The two wavelengths are located in the far infrared region, which allows accurate measurements even in the low-temperature range. Moreover, they are quite spaced out apart, which allows the achievement of a very good temperature resolution. A particular characteristic of the new infrared device is the use of mirror reflectors as collection optics to overcome problems of optical chromatic aberrations. On-line experimental data obtained from trials carried out on an industrial-scale extrusion die are presented and discussed

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