| 摘要 |
PURPOSE:To simply produce a grinding wheel with a coupling by a method wherein a square pillar rises on a mold while a coupling ring is fitted into the opening rim of a recess in the mold to cast a grinding wheel material into the recess thereof when a grinding wheel for polishing is mainly formed on the surface of stone material. CONSTITUTION:The recess 10 of a mold 9 made of a foamed synthetic resin is formed into the shape of a grinding wheel 13 to be molded. A square pillar 11 rises at the center on the bottom of the recess 10 and a coupling 1 which has a tappet on the inner surface of a ring and wedge teeth 3 on the outer surface thereof is securely fitted into a step 12 formed at the opening of the recess. Then, a grinding wheel material is casted into the mold through the opening of the recess 10 until it is flush with the surface of material 1. The top surface thereof is finished to be a smooth level surface and solidified to mold a specified grinding wheel 13. Thereafter, in the use of the grinding wheel 13, the mold 9 is broken with hands and the grinding wheel 13 is taken out. The tooth 3 of the coupling 1 protruded on the peripheral rim of the upper end thereof is retained on a socket section of a rotating shaft to mount the grinding wheel 13 thereon. |
