Patent ID: 8262951

Claim:
A method of forming a mold provided by winding a tape around peripheral surfaces of a first molding die and a second molding die, the mold having an injection port for injecting resin material into an inside of the mold, the injection port including an injection port main body and a tab for sealing the injection port main body, the method comprising: forming the tab by cutting out part of the tape non-circularly; and winding the tape around the peripheral surfaces of the first molding die and the second molding die, wherein the tab forming comprises: providing the tab by a part of the tape integrated with the rest of the tape, the tab and the rest of the tape being connected in a bendable manner, and forming the tab in advance and superimposing a tape-like injection port forming portion having the injection port main body formed in advance onto the tab, the tape superimposing comprises positioning the injection port main body formed to have an area smaller than the area of the tab so that the injection port main body is positioned over the tab; and the tape winding comprises winding the tape around the peripheral surfaces of the first molding die and the second molding die so that both end portions of the tape are superimposed on each other and the tab is exposed.