| Download | - View accepted manuscript: Real-Time Monitoring of Injection Moulding for Microfluidic Devices using Ultrasound (PDF, 670 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1002/pen.20310 |
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| Author | Search for: Ono, Y.1; Search for: Jen, C. -K.1; Search for: Cheng, C. C.; Search for: Kobayashi, M. |
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| Affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
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| Format | Text, Article |
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| Abstract | Real-time process monitoring of the fabrication process of microfluidic devices using a polymer injection molding machine was carried out using miniature ultrasonic probes. A thick piezoelectric lead-zirconate-titanate film as an ultrasonic transducer (UT) was fabricated onto one end of a 4-mm diameter and 12-mm long steel buffer rods using a sol gel spray technique. The center frequency and 6 dB bandwidth of this UT were 17 MHz and 14 MHz, respectively. A signal-to-noise ratio of more than 30 dB for ultrasonic signals reflected at the probing end was achieved. The probe can operate continuously at 200°C without ultrasonic couplant and cooling. Clear ultrasonic signals were obtained during injection molding of a 1-mm-thick part having test patterns on its surface. Shrinkage of the molded part and part detachment from the mold were successfully monitored. Surface imperfections of the molded parts due to a lack of the sufficient holding pressure is discussed with regard to the ultrasonic velocity obtained. The presented ultrasonic probes and technique enable on-line quality control of the molded part by optimizing the holding pressure and improvement of process efficiency by reducing the cycle time. |
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| Publication date | 2005-04-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 47567 |
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| NPARC number | 15955054 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9b4cd1ef-5f26-4e84-965d-95370b88ecc5 |
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| Record created | 2010-08-17 |
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| Record modified | 2020-04-07 |
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