Patent ID: 7387154
Filing Date: 2008-06-17
Classification: B22D

Abstract:
1. A metallic-molding-material runner system for distributing a molding material into a mold cavity of a mold, the molding material including a metallic component, the metallic-molding-material runner system comprising: a conduit assembly defining an input configured to receive the molding material, the conduit assembly being configured to convey the molding material from the input over to exit positions, the exit positions leading into the mold cavity of the mold, the conduit assembly including a collection of branches leading into the mold cavity being defined by the mold; a flow reducer being coupled to a branch of the collection of branches, the flow reducer being positioned: (i) between an exit position of the branch and the input of the conduit assembly, and (ii) away from the exit position, the flow reducer being configured to selectively reduce a flow of the molding material through the branch and into the mold prior to the mold becoming filled with the molding material, the flow reducer including: wherein; as a result of pressurizing the molding material, the molding material is subjected to a blow-out pressure of sufficient strength so that the molding material pushes the respective plugs out from the exit positions and the molding material flows into the mold cavity of the mold, before the molding material is subjected to the blow-out pressure, the flow reducer is actuated to form the solidified patch, the solidified patch reduces the flow of the molding material through the branch at a place where the flow reducer is coupled to the branch after the molding material is made to flow through the exit positions, so that an amount of flow of the molding material though another branch of the collection of branches will be greater than the amount of flow of the molding material through the branch at a place where the flow reducer is coupled to the branch such that the mold may become filled more quickly through a part of the mold cavity being located proximate to the another branch in comparison to another part of the mold cavity being located proximate to the branch.