Abstract: A gravity poured foundry mold having a gating system and at least one complete mold casting cavity, the gating system allowing castings to be made in more compact molds, using less metal at lower temperature, obtaining less solidification strained castings, and requiring less fettling work and less pattern work. The gating system combines the use of a strainer such as a skin-strainer with any of several fluid restraining devices including but not limited to skin-strainer covers, restraining floating pieces, non-floating restraining pieces and blind floating pieces. Also disclosed are applications in which a skin-strainer is omitted. There is disclosed apparatus which may be standardized, thereby greatly increasing the ease, accuracy and confidence with which the gating system may be used in foundries which would have available to them sets of different sizes of standardized, interchangeable and prefabricated elements as disclosed herein.

Abstract: A gravity poured foundry mold having a gating system and at least one complete mold casting cavity, the gating system allowing castings to be made in more compact molds, using less metal at lower temperature, obtaining less solidification strained castings, and requiring less fettling work and less pattern work. The gating system combines the use of a strainer such as a skin-strainer with any of several fluid restraining devices including but not limited to skin-strainer covers, restraining floating pieces, non-floating restraining pieces and blind floating pieces. Also disclosed are applications in which a skin-strainer is omitted. There is disclosed apparatus which may be standardized, thereby greatly increasing the ease, accuracy and confidence with which the gating system may be used in foundries which would have available to them sets of different sizes of standardized, interchangeable and prefabricated elements as disclosed herein.

Abstract: A gating system of general application for pouring foundry molds by gravity, based on a distinct prefabricated casting skin-strainer, located along and following the casting surface, structurally constructed and mold supported to withstand the impact of falling molten metal and the consequent metalistatic pressure, all while the cavity is filled through a skin-strainer aperture and with the skin-strainer retaining its original position and shape. The skin-strainer is able, when necessary, to allow the feeding of the casting once the mold is full and before it is solidified. Depending on the casting to be poured the system may include an overhead melt distributor, and techniques for mold casting cavity venting and sprue-feeder extraction.