| 摘要 |
PURPOSE:To mold easily a core in the stage of molding a core for forming a pipe socket to be used in centrifugal casting of a pipe by centering a core mold, imposing the same in a rotary table, injecting sand while rotating the core mold together with the table and molding the same with a strike-off plate. CONSTITUTION:A rotary table 5 which is rotated around a vertical axial center by a driving device 7 is provided and a core mold 14 consisting of a ring 15 and a molding flask 16 is imposed on the inside thereof. The mold 14 is correctly centered on the table 5 by a centering device 19, and is fixed to the inside on the table 5 by a locking device 32. A strike-off plate 50 is opposed to the core molding surface 18 of the mold 14 and is then approached thereto so as to be positioned on the molding surface. The mold 14 is rotated together with the table 5 in this state and sand for core is projected from a sand projection nozzle 51 to the surface 18 whereby a core 64 is molded on the surface 18. Cores having plural sizes are easily molded with a uniform wall thickness according to such method. |
