| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology which suppresses the lowering of the dimension accuracy of a rotating body at resin molding, in the resin-made rotating body which is used in a pump.SOLUTION: An impeller is a resin-made rotating body which is accommodated in a casing of a fuel pump, absorbs fuel into the casing, and sends out the fuel to the outside of the casing. The impeller comprises an insertion hole into which a shaft is inserted, and a communication hole which is positioned in the vicinity of the insertion hole, and penetrates the impeller in the rotation axial direction. The resin flow direction of resin positioned at the surroundings of the insertion hole and the communication hole is extended to at least the rotation axial direction. |
