34f08f34_rials_patent_application_class__Description
20130139994 06-06-2013 [Description] 
METHOD FOR PRODUCING A METAL PART - 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.
Utilizing particular mold materials patent application class