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 language | English (US) |
|---|---|
| Pages (from-to) | 6/135-6/146 |
| Journal | Advances in Powder Metallurgy and Particulate Materials |
| Volume | 2 |
| State | Published - 1995 |
| Event | Proceedings of the 1995 International Conference & Exhibition on Powder Metallurgy & Partuculate Materials. Part 1 (of 3) - Seattle, WA, USA Duration: May 14 1995 → May 17 1995 |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Metals and Alloys