Patent ID: 8052410

Claim:
A plastic injection mold for molding a plastic article, comprising: an upper insert; and a lower insert matching with the upper insert to define an annular mold cavity in between, an annular gate communicating with the mold cavity for molten plastic material to flow into the mold cavity to mold the article, and an annular runner connecting with the annular gate for injecting the molten plastic material to the annular gate; wherein the upper insert has a first mold core inserted therein with a lower end protruded into the lower insert, the upper insert and the lower insert are matched with each other to form the annular mold cavity located at an outer side of the lower end of the first mold core, the annular gate under an outer side of a bottom of the first mold core and connecting with a lower portion of an inner side of the mold cavity, and the annular runner connected with an inner side of the annular gate.