| 摘要 |
An adjustable sizing sleeve for pipe extrusion is provided. The sizing sleeve is a hollow, cylindrical body with a helical gap formed in the body. The helical gap allows the sleeve to be twisted by rotating opposing ends in opposite directions and resulting in a contraction of the inner diameter of the sleeve In another embodiment, a high intensity cooling feature of a calibrator assembly for extrusion is provided. The cooling feature is designed to provide a high Reynolds number and high pressure of cooling fluid flowing to a sizing sleeve (or other calibrator) of an extrusion assembly to provide sufficient cooling of the front-most portion of the sleeve to maximize heat transfer between the outer surface of the material being extruded and the inner surface of the front-most portion of the sleeve to fully solidify the entire surface of the material being extruded |
