Method for producing worm wheel, and worm wheel

A method for manufacturing a worm wheel including an inner wheel element including a side plate portion having a hollow circular plate shape and a tubular eave portion extending from a radially outer end portion of the side plate portion toward one axial side, and an outer wheel element made of a synthetic resin, including a wheel tooth portion on an outer circumferential surface thereof, and coupled and fixed to the inner wheel element in a manner of covering a radially outer portion of the side plate portion and the eave portion, the method comprising:

• molding the outer wheel element by disposing a mold around a radially outer portion of the inner wheel element, and feeding, at an angle, the molten synthetic resin from an annular or arc-shaped injection gate toward a pocket portion that is continuous over an entire circumference of a cavity present between an inner surface of the mold and a surface of the inner wheel element and that is present on a radially inner side of the eave portion, wherein the angle is an acute angle between a runner portion of the injection gate and the side plate portion, the molten synthetic resin being fed to the injection gate through the runner portion.