Patent ID: 7229276

Claim:
An apparatus for manufacturing an outer tube of an injector, comprising: an injection means for injecting a molten resin into a cavity defined by a metal mold comprising: a fixed mold having a hole portion having a shape along an outer shape of the injector outer tube consisting of a barrel portion, a taper portion arranged at a front end of the barrel where an injection needle is mounted, and a flange portion arranged at a rear end of the barrel, the fixed mold being provided vertical to a parting line defined by a rear end of the flange portion forming portion; a movable mold for closing the hole portion along the parting line; and a core piercing the movable mold and inserted into the hole portion; wherein the fixed mold includes a sprue for guiding the molten resin and a runner branching from the sprue; the movable mold includes a cylindrical vacant portion arranged vertical to the parting line and communicating with a portion where the flange portion is formed, and a submarine gate communicating with the runner and connected to an intermediate portion of the cylindrical vacant portion; the injection means injects the molten resin from the sprue via the runner and the submarine gate into the cylindrical vacant portion; and the apparatus comprising: an introduction means for introducing the molten resin from the cylindrical vacant portion via the cylindrical vacant portion into the cavity.