التفاصيل البيبلوغرافية
| العنوان: |
Factors influencing microinjection molding replication quality. |
| المؤلفون: |
Julie Vera, Anne-Catherine Brulez, Elise Contraires, Mathieu Larochette, Nathalie Trannoy-Orban, Maxime Pignon, Cyril Mauclair, Stéphane Valette, Stéphane Benayoun |
| المصدر: |
Journal of Micromechanics & Microengineering; Jan2018, Vol. 28 Issue 1, p1-1, 1p |
| مصطلحات موضوعية: |
MICROINJECTIONS, INJECTION molding, OPTICAL gratings, PARAMETERS (Statistics), VISCOSITY |
| مستخلص: |
In recent years, there has been increased interest in producing and providing high-precision plastic parts that can be manufactured by microinjection molding: gears, pumps, optical grating elements, and so on. For all of these applications, the replication quality is essential. This study has two goals: (1) fabrication of high-precision parts using the conventional injection molding machine; (2) identification of robust parameters that ensure production quality. Thus, different technological solutions have been used: cavity vacuuming and the use of a mold coated with DLC or CrN deposits. AFM and SEM analyses were carried out to characterize the replication profile. The replication quality was studied in terms of the process parameters, coated and uncoated molds and crystallinity of the polymer. Specific studies were processed to quantify the replicability of injection molded parts (ABS, PC and PP). Analysis of the Taguchi experimental designs permits prioritization of the impact of each parameter on the replication quality. A discussion taking into account these new parameters and the thermal and spreading properties on the coatings is proposed. It appeared that, in general, increasing the mold temperature improves the molten polymer fill in submicron features except for the steel insert (for which the presence of a vacuum is the most important factor). Moreover, the DLC coating was the best coating to increase the quality of the replication. This result could be explained by the lower thermal diffusivity of this coating. We noted that the viscosity of the polymers is not a primordial factor of the replication quality. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |