Six, rapid prototyping manufacturing (RPM) technology has been better developed: rapid prototyping manufacturing (RPM) technology was first introduced in the United States. It is produced along with the development of computer technology, laser forming technology and new material technology. It is a brand-new manufacturing technology, based on the novel discrete/stacking (ie material accumulation) forming idea, according to the part CAD model, fast and automatic Complete the manufacturing of complex three-dimensional entities (prototypes). RPM technology is a high-tech technology that integrates the latest developments in precision machinery manufacturing, computers, NC technology, laser forming technology and material science. It is recognized as a technological revolution after NC technology.