Gießkerne

Gießkerne, also known as cores in English casting terminology, are essential components used in the sand casting process to create internal cavities or hollow spaces within a cast part. They are typically made from a sand mixture, similar to the molding sand, but with added binders that allow them to withstand the high temperatures and pressures of molten metal during the casting pour. The core is placed within the mold cavity before the metal is introduced. When the metal solidifies, the core remains embedded within the casting. After the casting has cooled sufficiently, the core material is removed, typically by vibration, hammering, or by dissolving certain types of binders, leaving the desired internal void.

The design and composition of a Gießkern are critical for the success of the casting. Factors such as the shape of the cavity, the type of metal being cast, and the required surface finish of the internal surfaces all influence the core's design and the materials used. Gießkerne can be simple cylindrical shapes or complex geometries to form intricate internal passages. They play a vital role in producing lightweight components, channels for fluids or gases, and other functional internal features that cannot be achieved through simple mold shaping alone. The effective removal of the Gießkern is also a crucial step in the post-casting process to ensure the integrity and functionality of the final product.