The machine of work institutions is by upper and lower two group turntable institutions composition, work shí from feeding mouth entered of not regeneration resin sand in gravity role xià whereabouts, dang landing throwing sand disc turned lock formed of vortex spin-like regional shí, and throwing sand disc within of high-speed turned of sand occurred impact, and friction, and impact hòu of most sand left in throwing sand disc within, and fixed disc and the disc within of sand occurred impact, and friction, and makes resin film off, last from fixed disc of end Department throwing to fixed disc shàng of high manganese steel leaves, kinetic energy high of sand bean and Not stripping, and leaves of large grains of sand were bounced back to sanding disc, is accelerated again until the sanding disc and gaps between fixed disc goes down. Was thrown out and the whereabouts of the sand funnel opening into the secondary dial structure and regeneration of the sand has been further.