The tube blank is designed in computeraided manner to increase the yield. The cors and cavity of mold are made of quality steel preheattreatedat the original plant in Swede. The threaded opening is made of imported nitrated steel that is of highhardness and extended lifetime. In accordance with international standard. The advanced hot runner design allows uniform heating,resulting in the increase of plastic productsquality. The no cutting gate mold allows reduction of labor intensity. The room-temperature water-cooling system enables high-efficiency andfullyautomatic production.