SHAFT SPRING FOR RAILROAD VEHICLE AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a shaft spring for railroad vehicle, which is improved to attain a stable quality as product in addition to reduction in level of defectiveness by avoiding a trouble such that vulcanization of unvulcanized rubber is started within an injection pot in molding as much as possible so that the vulcanization is started after it is charged in a mold. SOLUTION: The shaft spring for railroad vehicle includes an elastic portion 3 interposed between a main shaft 1 and an outer cylinder 2 having a shaft center P perfectly or substantially the same as that of the main shaft, the elastic portion 3 having a laminated rubber structure in which a plurality of rubber layers 4 and one or more hard partition walls 5 are laminated alternately in a radially internal and external direction so as to be perfectly or substantially concentric to the shaft center P. The rubber used for the rubber layers 4 contains a vulcanization accelerator having a critical temperature higher than the temperature of the injection pot in molding thereof. COPYRIGHT: (C)2011,JPO&INPIT