What is the first step in the sand casting process?

The first step in the sand casting process is to make a pattern. A pattern is a replica of the object to be cast and is usually made from materials such as wood, metal, or plastic. It serves as a template for creating the mould into which the molten metal will be poured. The accuracy and quality of the pattern directly influence the final product, making it essential to ensure that it reflects the correct dimensions and surface finish required for the finished casting.

Creating the pattern is crucial because once it's made, it will be used to shape the sand into the two halves of the mould. Each subsequent step, including fitting the mould halves together or pouring molten metal, cannot proceed until the pattern is properly prepared. Thus, the making of the pattern is foundational in laying the groundwork for the sand casting process and ensuring the accuracy of the final product.