Patent ID: 7883328

Claim:
An extrusion device for making a spiral stripping electrical wire, comprising: a fixed mold member, said fixed mold member comprising a main flow path and a supplementary flow path for the passing of a first insulative material and a second insulative material respectively, said main flow path and said supplementary flow path each having an inlet and an outlet; and a rotating mold member rotatably supported on a front end of said fixed mold member, said rotating mold member having a mold hole in communication and axial alignment with the outlet of said main flow path and at least one flow path, the at least one flow path of said rotating mold member each having an outlet in communication with said mold hole and an annular inlet disposed on a rear end of said rotating mold member in communication with the outlet of said supplementary flow path; wherein said fixed mold member is comprised of an inner mold element and an outer mold element, said inner mold element having an outer surface, said outer mold element having an inner surface, the inner surface of said outer mold element and the outer surface of said inner mold element defining said main flow path; and wherein said rotating mold member has an annular protrusion protruded from a rear end thereof and defining a circular recess; said outer mold element of said fixed mold has an annular protrusion protruded from a front end thereof and inserted into the circular recess of said rotating mold member and an annular groove, which receives the annular protrusion of said rotating mold member.