Without mold forming, rapid prototyping refers to the process of manufacturing a complete product in the shortest possible time based on product design documents, using a series of equipment and techniques. In the new product development phase, rapid prototyping is a crucial step, allowing samples of the product design to be produced quickly. It is typically used to evaluate the appearance, functionality, assembly, and post-production processes of a new product, as well as to verify the feasibility of the product design.  There are various methods of prototyping, including CNC machining, 3D printing rapid prototyping, vacuum casting, and sheet metal prototype processing, among others.