| 摘要 |
<p>The invention relates to a piston ( 1 ), which is comprised of an approximately circular cylindrical upper area ( 5 ) and of a lower area ( 6 ), having two hubs ( 7 ), which are set back toward the piston central axis ( 8 ) so that, in the upper area ( 5 ), recesses ( 12, 12' ) can be made, which are open toward the lower area ( 6 ), in the vicinity of the hubs ( 7 ). In order to make relief cuts ( 13, 13' ) in the area between the hubs ( 7 ) and the upper area ( 5 ), a salt mold part ( 15 ) is placed on the respective window insert ( 14 ). The salt mold part ( 15 ) serves to produce the recesses ( 12, 12' ) as well as the relief cuts ( 13, 13' ) when casting the piston ( 1 ) and is washed out after the piston ( 1 ) has been cast.</p> |
