Flow Length Measurement of Injection Molded Spirals Using a Flatbed Scanner

  • Martin P. Jones (Missouri State University)
  • Richard N. Callahan (Missouri State University)
  • Richard D. Bruce (Missouri State University)


This paper describes the potential of using flatbed scanners for a wide variety of dimensional measurements critical in the manufacturing of parts. A detailed example is presented on the measurement of thermoplastic spiral specimens. Some researchers use a spiral mold as a benchmark to assess the flow optimization of injection-molded thermoplastics. The spiral’s length is critical in determining optimization algorithms that control the temperature, pressure, and speed of injection. This paper de- scribes a new method developed for the precise measurement of these molded spiral lengths using a common flatbed scanner and AutoCAD software. The researchers compared measurements taken with a flatbed scanner to that of a profile projector through a gage repeatability and reproducibility (GR&R) study. Results of the study showed that flatbed scanners can be used to measure objects to an acceptable level of repeatability and reproducibility.

Keywords: manufacturing, metrology, plastics/polymers, quality control

How to Cite:

Jones, M. P. & Callahan, R. N. & Bruce, R. D., (2011) “Flow Length Measurement of Injection Molded Spirals Using a Flatbed Scanner”, Journal of Industrial Technology 27(1).

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Published on
31 Dec 2010