With the accelerated growth of the polymer powder 3D printing market (especially in 2021, the global market size will exceed that of photopolymer 3D printing for the first time), it has become the most widely used method of manufacturing end products among various 3D printing technologies. . Among them, SLS laser sintering, as the earliest and most mature polymer powder molding technology, has also been widely used. The market demand has put forward higher requirements for the two key indicators of industrial-grade SLS 3D printing equipment, such as molding volume and printing efficiency. Require.