What is the function of a chaplet in sand casting?

The function of a chaplet in sand casting is to support the core within the mold. When creating intricate cast parts, a core might be used to form internal cavities or shapes. Because these cores can be relatively lightweight compared to the surrounding sand or the molten metal being poured, chaplets are specifically designed to provide stability, ensuring that the core remains in the correct position during the pouring and solidification of the metal. This positioning is crucial because it impacts the final geometry of the cast object and the overall quality of the product.

In contrast, other functions described in the choices do not accurately represent the specific use of chaplets. For instance, holding the mold together during pouring is typically accomplished by the mold's structure or other mechanisms rather than chaplets. Aiding in the cooling process of the metal is typically handled by the material properties of the mold or the design of the casting itself, rather than chaplets. While creating intricate designs could involve various mold or core making techniques, chaplets themselves are not utilized for this purpose. Thus, supporting the core is the targeted and correct function of chaplets in the sand casting process.