Motor block as well as casting mold and casting method for the manufacture thereof
AssigneeVAW alucast GmbH
InventorsHerbert Smetan, Klaus Lellig
Life of this patent
Estimating the term…
Abstract
In an engine block having cylinder cavities arranged close together, a cooling duct is produced in an intermediate wall between the cylinders by pouring the casting material around a mold core made preferably from a material that is soluble in a liquid, combustible and/or brittle, so that the mold core can easily be removed from the duct once the casting has solidified. In the casting mold, the duct mold core is secured solely at its ends so that a cooling duct is formed that is bordered exclusively by a skin of casting material.
Claims9
An engine block comprising cylinders, an intermediate wall between the cylinders and at least one cooling duct extending in the intermediate wall, the intermediate wall having a minimum casting material thickness of less than 5 mm, the cylinders having cylinder axes and the cooling duct having a cross-sectional axis perpendicularly intersecting the cylinder axes, wherein the cooling duct is bordered exclusively by a skin of casting material, and wherein the cooling duct has a minimum width in a direction of the cross-sectional axis of between 0.5 mm and 1.0 mm.
A casting mold for producing an engine block comprising a cooling duct extending between cylinder cavities of a row of cylinders, a wall of casting material having a minimum thickness of less than 5 mm being located between the cylinder cavities, and a duct mold core of glass secured only at ends thereof being arranged in the casting mold between cores forming the cylinder cavities.
A method of manufacturing an engine block having at least one cooling duct located in an intermediate wall between adjacent cylinder cavities, wherein the wall formed by casting material has a thickness of less than 5 mm, the method comprising arranging a duct mold core of glass in casting mold between cores forming the cylinder cavities, and attaching the duct mold core only at ends thereof.
Dependencies are inferred from the claim text.