SIVEX FC - a 'Filter' with a ceramic foam structure especially for aluminium repetition castings

摘要

Diverse filter materials, with distinct differences in structure and properties are employed today in the aluminium foundry industry. Materials with a foamed structure are very frequently employed mainly to control the rate of mould filling in the production of high quality castings with the most demanding mechanical properties. In discussions, standard filters based on Al_2O_3 - or SiC have created a certain amount of skepticism with regard to their suitability for re-melting and ceramic composition. SIVEX FC filters, developed specially for aluminium castings combine the advantages of the foamed structure with those of a machinable and relatively light filter material. The machinability of these filters was compared with standard filters in a comprehensive project with Fraunhofer IPT Aachen. The result from Fraunhofer IPT are reproduced in figure 8.