New Furan no-bake binders to reduce the formaldehyde emission levels in the processes

The emissions of hazardous substances generated by the use of chemical binders represent today one of the most urgent challenges that the foundry industry has to solve. A considerable threat to the environment and to the human health due to their high toxicity, carcinogenicity and mutagenicity (new and more strict regulations along with the re-classification of certain products are being set in place).

While the furan binders are beneficial for foundries to produce quality castings at low cost, they can produce considerable amounts of hazardous air pollutants, when they are thermally decomposed during metal casting processes. Several chemical binder systems are currently used in the casting industry for the agglomeration of sand molds and for the fabrication of sand cores, according to the own production process requirements and the final product to be manufactured: Furan-Acid, Phenolic-Acid, Phenolic-Alkali, Phenolic-Urethane and Silicate-Ester.

Nuevas resinas para sistemas de moldeo furánicos, orientadas a la reducción de emisiones de formaldehido en planta

Las emisiones de sustancias químicas nocivas generadas por el uso de aglomerantes químicos, representan hoy en día uno de los retos más urgentes a los que se enfrenta el sector de fundición en materia de prevención de riesgos laborales, teniendo a su vez en cuenta las nuevas reclasificaciones de peligrosidad realizadas para determinados productos.

Son varios los sistemas químicos que se utilizan actualmente en fundición para la aglomeración de la arena de los moldes, en función del propio proceso productivo y del producto final a fabricar: Furánico-Ácido, Fenólico-Ácido, Fenólico-Alcalino, Fenólico-Uretano y Silicato-Éster.