| 摘要 |
The invention pertains to a casting with an opening which at its ends provides a plain bearing to hold an axle or shaft. If the axle or shaft has a constant cross section, this means that the bearings also have a uniform inside diameter. The core piece (10, 11), which keeps the opening free of material during casting, must have a constant cross section over the full length of the opening so that it can be removed after the casting. However, such a core piece is very hard to remove due to the substantial frictional forces between the wall of the core piece and the inside wall of the casting during removal of said core. The invention therefore proposes a two-part core piece (10, 11) and bearings (3, 4) that are discontinuous in the casting (1). This design enables the region (8) between the bearings (4, 5) to run conically in sections, so that the corresponding pieces of the core can be removed through the gaps between the sliders of the discontinuous bearing (4, 5). |
