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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. Coates, Philip D.
Mulvaney-Johnson, Leigh
Cheng, C-C.
Ono, Y.
Jen, C.K.
Coates, Philip D.
Publication Date
2007
End of Embargo
Supervisor
Rights
© 2007 Institute of Materials, Minerals and Mining and Maney Publishing. Reproduced in accordance with the publisher's self-archiving policy.
Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
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Department
Awarded
Embargo end date
Additional title
Abstract
An ultrasound sensor system has been applied to the mould of both the water and gas assisted
injection moulding processes. The mould has a cavity wall mounted pressure sensor and instrumentation to
monitor the injection moulding machine. Two ultrasound sensors are used to monitor the arrival of the fluid
(gas or water) bubble tip through the detection of reflected ultrasound energy from the fluid polymer
boundary and the fluid bubble tip velocity through the polymer melt is estimated. The polymer contact with
the cavity wall is observed through the reflected ultrasound energy from that boundary. A theoretically
based estimation of the residual wall thickness is made using the ultrasound reflection from the fluid (gas or
water) polymer boundary whilst the samples are still inside the mould and a good correlation with a physical
measurement is observed.
Version
Accepted manuscript
Citation
Mulvaney-Johnson, L. et al. (2007). Real-time diagnostics of gas/water assisted injection moulding using integrated ultrasonic sensors. Plastics, Rubber and Composites: Macromolecular Engineering. Vol. 36, No. 6, pp. 111-121(11).
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Article