MOLD FOR CASTING WITH CENTRIFUGAL FORCE OF CAST IRON PIPE WITH POURING CUP PART

摘要

PURPOSE:To form the sound inner face of a pouring cup part having no blow with maintaining the fineness of a casting surface by molding the core mold for forming the inner face of a pouring cup part equipped at the end part of the pouring cup part of a rotary metal frame by the casting sand of specified grain size. CONSTITUTION:The core mold 2 for forming the pouring cup inner face equipped at the and part of the pouring cup part 3 of the rotary metal frame 1 for centrifugal casting is molded by the casting sand of 7-26 A.F.S. grain size coefft. A silica sand is mainly used from the casting sand and a water glass, etc., are used for the coking material. The sound pouring cup part inner face with less generation of blow holes can be thus formed by the excelled permeability with maintaining the fineness of the casting surface.