| 摘要 |
PURPOSE:To facilitate setting of an inter ring in a mold and effectively prevent the deformation owing to a contraction work by a method wherein three or more notches or oblong holes axially extended at equal intervals in the same direction in positions facing to each other are formed at respective ends of both cylindrical end parts of a cylindrical intermediate plate. CONSTITUTION:Four axially extending notches 5a are formed at equal intervals both cylindrical end parts of an inter ring 4. Thus, the directional properties of an elastic modulus are effectively improved. In this case, the notches 5a formed in each cylindrical end part may be at least three in a number. As a result, since the elastic modulus has no directional properties, deformation during a squeezing work is effectively prevented from occurring. Setting of the inter ring in a mold during molding is facilitated in such a way that the notch 5a formed in the cylindrical end part on the one side if formed alternately in the end part on the other side. |
