Green part characterization and in situ monitoring of powder injection molding using ultrasonic sensors

Suresh M. Menon, Randall M. German, Joseph L. Rose, Karl F. Hens

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

This paper reports an advanced system to monitor injection molding of powders in situ and post factum. The in situ inspection involves an ultrasonic transducer mounted in the mold that can be used to excite a variety of different guided waves into the shaped feedstock. Energy leakage into the mold is detected by a receiving ultrasonic sensor mounted at a strategic location inside the mold. Parts with internal porosity and surface cracks have been detected using guided wave mode control and signal processing. Post factum inspection is also carried out using guided waves to determine the viscoelastic constants of the material. This eventually helps in interpreting the in situ signals and allows determination of the integrity with respect to internal porosity and surface cracks.

Original languageEnglish (US)
Pages (from-to)6/135-6/146
JournalAdvances in Powder Metallurgy and Particulate Materials
Volume2
StatePublished - Dec 1 1995
EventProceedings of the 1995 International Conference & Exhibition on Powder Metallurgy & Partuculate Materials. Part 1 (of 3) - Seattle, WA, USA
Duration: May 14 1995May 17 1995

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Metals and Alloys

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