1:with advanced double-taper positioning technology,each core is independently locked and adjusted so that low eccentricity of product can be guaranteed. 2:injection cavity,core and neckings are made form imported high quality mold steel with their surface nitriding treated to reach high strength for prolonging the mould's working life. 3:no cutting of gate is needed.the labor intensity is reduced. 4:high efficiency is attained with water-cooling at normal temperature.full-automatic production.