| Téléchargement | - Voir le manuscrit accepté : Real-Time Monitoring of Injection Moulding for Microfluidic Devices using Ultrasound (PDF, 670 Kio)
|
|---|
| DOI | Trouver le DOI : https://doi.org/10.1002/pen.20310 |
|---|
| Auteur | Rechercher : Ono, Y.1; Rechercher : Jen, C. -K.1; Rechercher : Cheng, C. C.; Rechercher : Kobayashi, M. |
|---|
| Affiliation | - Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Résumé | 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. |
|---|
| Date de publication | 2005-04-01 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro du CNRC | NRCC 47567 |
|---|
| Numéro NPARC | 15955054 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 9b4cd1ef-5f26-4e84-965d-95370b88ecc5 |
|---|
| Enregistrement créé | 2010-08-17 |
|---|
| Enregistrement modifié | 2020-04-07 |
|---|
