| Titre : |
In-process monitoring of micromoulding – assessment of process variation |
| Type de document : |
texte imprimé |
| Auteurs : |
B. R. Whiteside, Auteur ; P. D. Coates, Auteur ; Mike T. Martyn, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 162-169 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Advances in micromoulding technology are leading to complex, net-shape products having sub-milligramme masses with micro-scale surface features in a range of polymer and nanocomposite materials. For such small components subjected to the extreme stress, strain-rate and temperature gradients encountered in the micromoulding process, detailed process monitoring is desirable to highlight variations in moulding conditions and assist in creating a viable manufacturing process with acceptable quality products. This paper covers the implementation of a suite of sensors on a commercial micromoulding machine and detailed computer monitoring during processing of a polyacetal component over a range of processing conditions. The results determined that cavity pressure curve integral data provides the most sensitive factor for characterisation of a moulding process of a 0.34mm3 (0.49mg) product. The repeatability of the process is directly compared with that of a 15.6mm3 (22.2mg) product and shown to be inferior. DSC measurements of the whole products indicated little variation in average crystallinity of the products manufactured over a mould temperature range of 30 to 130°C. |
| DOI : |
10.3139/217.1876 |
| En ligne : |
https://drive.google.com/file/d/1GBlj5iRVKeyUDCaJsfWi3Nv8-j-bJaL7/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3076 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XX, N° 2 (06/2005) . - p. 162-169
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