Sieving machines are devices used to separate materials based on their size. They work by passing a mixture through a screen or mesh, allowing smaller particles to fall through while larger ones remain on top. This process is commonly used in industries like construction, food processing, and pharmaceuticals to ensure product quality and consistency. These machines come in various types, including vibrating sieves, rotary sieves, and static sieves. Each type is designed for specific applications and can handle different materials, such as powders, grains, or aggregates. By efficiently sorting materials, sieving machines help improve production processes and reduce waste.