Abstract: The present invention belongs to the field of the additives for molding sands used in the manufacture of casting molds and cores. More specifically, the present invention relates to an additive to prevent veining in the manufacture of metal parts, to a molding sand comprising said additive, to a core or mold prepared from said molding sand and to a metal part prepared by means of using one of said cores or molds.
Type:
Application
Filed:
December 30, 2010
Publication date:
October 10, 2013
Applicant:
ASK CHEMICALS ESPANA S.A.
Inventors:
Santiago Prat Urreiztieta, Marco Antonio Mendizábal Castellanos, Maria José Puertollano Abascal, Jesús Reina Rivero
Abstract: The invention relates to methods of casting metal parts in sand molds, with the particularity that it is not necessary to use sleeves surrounding the feed risers which are arranged outside the part to offset the shrinkage occurring during the solidification of the molten metals. The operations of placing the sleeves which must be arranged around the risers are eliminated with the method object of the invention, the actual sleeves being made when the sand mold is produced.