Patent ID: 8557161

Claim:
A method of manufacturing a ribbed in-mold label container, comprising: preparing an injection molding die for molding a container body having a plurality of projection-type ribs on an outer periphery of a lateral surface thereof; disposing a label at such a position within the injection molding die so that the label serves as the outer periphery of the lateral surface of the container body; and injecting a resin into the injection molding die to integrally mold the container body and the label, wherein: by injecting the resin into the injection molding die, on which the label is disposed, the resin is caused to flow to both sides of the label and form the ribs and the container body on an outer peripheral side and an inner peripheral side of the label respectively; the label is pressed toward an outer peripheral surface of a core of the injection molding die or an inner peripheral surface provided on a cavity side due to a shearing speed and/or a shearing pressure of the injected resin and then destroyed, whereby the resin is caused to flow to both sides of the label: the ribs are formed from the resin that partly destroys the label so that resin penetrates the label and flows along an outside of the label at a time of injection molding; the ribs are separated from the container body except for at least one end; and the label is sandwiched between the container body and the ribs.