Patent ID: 7442033

Claim:
An injection mold comprising: a first mold; a second mold together with the first mold cooperatively defining a cavity therebetween for forming a molded article, the second mold comprising a runner defined therein for melted resin running therethrough, the runner comprising a nozzle communicating with the cavity, a through hole defined in the second mold and having an end disposed at a connection between the nozzle and the cavity; and a trimming member slidably received in the through hole of the second mold and being movable between a first position where the trimming member is removed from the nozzle to allow the melted resin flowing into the cavity and a second position where the trimming member closes the nozzle to prevent the melted resin flowing into the cavity, wherein the through hole comprises a rounded portion communicating with the nozzle of the runner, and a rectangular portion connecting with the rounded portion, the trimming member comprises a rounded portion, and a rectangular portion, corresponding to the rounded portion and the rectangular portion of the through hole of the second mold respectively.