Zhoushan Nanhaiya Plastic Machinery Co., Ltd is a professional manufacturer specialized in screw and barrel for several decades. NHY has rich experience in processing and designing, providing customers with nitriding, chrome plating, stainless steel, bimetallic surfacing, tungsten carbide surface spraying and other products to meet the needs of different applications. The products including screw and barrel of plastic injection molding machine, screw and barrel of rubber extruder, segment screw and barrel, single screw and barrel of extruder, conical twin screw and barrel of extruder, parallel twin screw and barrel of extruder, nitriding screw and barrel, bimetallic screw and barrel,etc. 

With the abundant technical strength, advanced technology and processes, NHY use hard alloy spraying the whole circle around the easy-damage part of the barrel inside, let the barrel’s inside hardness reach to 62HRC. Compared to other manufacturer, their hardness only 58HRC. The depth of the alloy layer is 2.5-3mm, adding Tungsten alloy besides the normal alloy, thus it can largely improve the wear resistance and use life...