| 摘要 |
An extrusion die assembly having a composite extruding bore comprising a flared entrance section with a radius of curvature of approximately 0.2 times the diameter of the extrusion bore, a first conical extruding section which wall forms an angle about the axis of preferably 12 DEG , a second conical extruding section with its wall forming an angle of preferably 6 DEG about the axis, a third cylindrical extruding section with its wall forming an angle of 0 DEG about the axis, an expanded section of a diameter substantially larger than the extruded diameter of the connector member, and a cylindrical guiding outlet section having a diameter slightly larger than the diameter of said cylindrical extruding section.
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