Cordis - The Inorganic Binder System
Constantly rising demands on quality and environmental compatibility confront foundries and their suppliers with an ever increasing array of new challenges. In addition to increasing productivity, meeting environmental and industrial safety regulations represents one of the factors of success for foundries, a challenge that requires constant supervision and ongoing development of existing processes and operations.
For both ecological and economic reasons, the emissions and associated unpleasant odours liberated during coremaking and when the sand cores contact the melt must be eliminated to the extent possible by means of process-integrated primary measures.
In the course of the last GIFA in 2003, the use of new inorganic core binders was a much-discussed topic. Great hopes and expectations were placed on these new materials. They were said to markedly decrease or eliminate many disadvantages of organic binders, such as emissions during coremaking, gas defects, formation of condensate and liberation of odours during the casting process.
Over the past four years, in teamwork with a strong partner in the foundry industry, Hüttenes-Albertus has been successful in establishing both a high-volume coremaking line (intake manifold cores) and a highly diversified production line (cylinder head cores). In addition to designing a separate production line, we also gained experience in corebox design and dimensioning, as well as insights on the coremaking operation extending to the supply of sand and binder.
Thanks to the inorganic nature of the Cordis binder, no residues in the form of condensate develop during the casting operation, ensuring increased productivity. Permanent moulds, for example, need not be cleaned several times per shift, as is otherwise customary. Similarly, inorganic binders afford a considerable decrease in casting porosity due to gasses liberated from the cores.
There is no smoke or odour development during the casting operation.
| Technical lecture: Cordis - The Inorganic Binder SystemProperties and Experiences - Inorganic Binder Cordis from Hüttenes-Albertus Foundries are constantly presented with new challenges in terms of design requirements and in connection with the increasingly stringent environmental and safety regulations. So the demand for alternative binder systems has increased during the least few years, with especially inorganic binders moving into the centre of attention. >>> more |
