Patent ID: 6884381

Claim:
A method of injection molding in which a pre-pressurized molten resin is injected from a nozzle of annular shape having an outer peripheral surface into an interior portion of a cavity of a mold via a gate, and the molten resin injected into the cavity is cooled and solidified whereby a molded product of synthetic resin is obtained, the method comprising the steps of: providing molten resin supplying means radially outside of the annular shape of the nozzle, and providing a plurality of resin injection holes along the outer peripheral surface of the nozzle in an equal interval; and guiding the molten resin from the molten resin supplying means to the plurality of the resin injection holes by using a runner having minimum distances of communication between the molten resin supplying means and each of the resin injection holes that are equal to each other.