Zinc chloride influence on the resins furan polymerization to foundry moulds

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Characterization of Minerals, Metals, and Materials 2016
Citações (Scopus)
de Miranda L.F.
Vale M.
Munhoz A.H.
Masson T.J.
de Andrade e Silva L.G.
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© 2016 by The Minerals, Metals & Materials Society.The resins used in foundry molds developed for the automotive market has led to major changes in the manufacturing method of foundry molds. The polymerization of these resins and a subsequent curing are used to connect to the foundry sand in a rigid structure capable of receiving and holding liquid metal. It is essential to know the process of polymerization of these resins and their impact on the final properties of the obtained molds, especially in the mechanical characteristics. In this work it was studied the influence of the addition of zinc chloride (in solution) in the sand-furan resin mixture, with the aim of reducing the relation between the extraction time intervals and time bench life. The results showed that addition of percentages of the order of 5.0wt% to 7.5wt% zinc chloride solution reduces this ratio between 10% and 17%; this means that the casting model may be extracted from the sand mass in a smaller time interval increasing the productivity of manufacturing molds. It was also observed that there was also an increase of 9% to 18% in bench life intervals.
Assuntos Scopus
Automotive markets , Chloride solutions , Extraction time , Manufacturing methods , Mechanical characteristics , Resin mixtures , Time interval
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