Patent ID: 8079403
Filing Date: 2011-12-20
Classification: B22C,F02F

Abstract:
1. A soluble casting core, in the form of an open ring having a first end and a second end, the first end being open and the second end being closed, for forming a cooling channel in a piston produced using casting technology, the piston having two pin bosses that are formed onto the piston crown by way of a pin boss support, wherein the first end of the casting core forms a core bend in the shape of a quarter circle, into a fourth formed-on part disposed at least approximately parallel to an axis of symmetry of the casting core, said fourth formed on part forming an oil supply opening of the cooling channel and being disposed in a region of a pin boss support of one of the two pin bosses when the piston is cast around the core, wherein the casting core has a first formed-on part near the second end of the casting core, said first formed-on part is open and pointing in a direction parallel to a pointing direction of the forth formed-on part, for forming a first oil drain opening opposite to the oil supply opening, and said first formed-on part extends perpendicular to a bottom surface of the ring, wherein both the oil supply opening and the first oil drain opening are disposed either on a major thrust side or on a minor thrust side of the piston when the piston is cast around the core, and wherein a third formed-on part, which lies in the circumferential direction and is oblong in shape, is disposed between the first formed-on part and the second end of the casting core, for forming a continuation of the cooling channel between the first oil drain opening and the closed end of the cooling channel.