ZHOUSHAN OSD MACHINERY IS MAINLY MAKING SCREW AND BARREL FOR OVER 20 YEARS, WITH LOTS OF EXPERIENCE FOR SCREW AND BARRELS FOR INJECTION AND EXTRUDER MACHINE. WE ALSO MAKE LOW TEMPERATURE GRANULATOR,USING AIR COOLING, NO WATER, NO SMOKE, NO DUST, ENVIRONMENTAL AND ECONOMIC, USED FOR MANY PLASTIC MATERIALS