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Real-time diagnostics of gas/water assisted injection moulding using integrated ultrasonic sensors
Mulvaney-Johnson, Leigh Cheng, C-C. Ono, Y. Jen, C.K.
Mulvaney-Johnson, Leigh
Cheng, C-C.
Ono, Y.
Jen, C.K.
Publication Date
2007
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© 2007 Institute of Materials, Minerals and Mining and Maney Publishing. Reproduced in accordance with the publisher's self-archiving policy.
Peer-Reviewed
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openAccess
Accepted for publication
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Abstract
An ultrasound sensor system has been integrated into the mould for both water‑ and gas‑assisted injection moulding processes. The mould incorporates a cavity‑wall‑mounted pressure sensor and instrumentation for monitoring the injection moulding machine. Two ultrasound sensors detect the arrival of the advancing fluid (gas or water) bubble tip by measuring reflected ultrasound energy from the fluid–polymer boundary, enabling estimation of the bubble‑tip velocity through the polymer melt. Polymer contact with the cavity wall is similarly monitored via reflections from that boundary. A theoretically based estimation of the residual wall thickness is obtained from ultrasound reflections at the fluid–polymer interface while the samples remain inside the mould, and this estimation shows good correlation with physical measurements.
Version
Accepted manuscript
Citation
Mulvaney-Johnson L, Cheng CC, Ono Y et al (2007) Real-time diagnostics of gas/water assisted injection moulding using integrated ultrasonic sensors. Plastics, Rubber and Composites: Macromolecular Engineering. 36(6): 111-121(11)
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Article