Loading station with piece selection via vibrating belt, piece picking with anthropomorphic robot and deposit on backlit belt for piece integrity check and subsequent loading on double piece-holding components. Double dosing stations and visual control in case of need to increase production. XY axes Cartesian system for dosing and Teflon application on the piece. Teflon application in rotation according to the set quota. Camera with intelligent control to check the correct dosage. Waste piece evacuation in case of incorrect dosing. Good piece unloading by scara robot on controlled temperature drying oven. Dry piece unloading in box.