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FP5

CATIPRO Résumé de rapport

Project ID: G5ST-CT-2001-50140
Financé au titre de: FP5-GROWTH
Pays: Greece

The casting parameters were optimised and the defects origin identified during casting. Based on these results, suggestions for limiting the problems were made

Concerning the Ti castings preparation procedure for the application of the dental porcelain it was shown that the surface roughness is significantly depended on grain size and applied pressure during sandblasting but remains unaffected of incident angle. The surface roughness of cp Ti casting is increased by: a) increasing the mean size of alumina grains and b) increasing the applied pressure (and thus the velocity of particles) of sandblasting machine when 100 and 250µm powders are used
A study was also undertaken to optimise the casting parameters and to identify the defects origin during casting. Based on these results, suggestions for limiting the problems were suggested.

In more detail with an indication of the key experimental results, the conclusions are:
The defects such as lack of filling and dimensional errors are caused mainly by a bad design of the feeding. In general, we have been able to observe that it is more critical in the Ciclarc II machine from Morita, whose process of filling and solidification is by differential pressure) than in the Easyti machine from Manfredi, in which the process of filling and solidification is by centrifugation, making easy the filling of the titanium melted).

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George VOULDIS, (DIRECTOR)
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