How does the HP Jet Melting process work?

At the heart of the HP printer are two modules on the workbench: the “Powder Module” and the “Hot Sprinkler Module”. The “Powder Module” is used to lay powder materials on the printing table. The "hot nozzle module" is used to spray two kinds of chemical reagents, "melt agent" and "refiner". This module is the biggest highlight of HP's printer. It can be used at 30 million drops per inch per second. The two reagents are sprayed in quantities.