| 摘要 |
A method of forming the bell end of a bell and spigot joint connecting two pipes together is disclosed herein and utilizes an elongated mandrel having a circumferential recess and a circumferential ramped surface extending from the recess. A sealing gasket is positioned around the mandrel and within the recess, whereupon a heat deformable pipe, heated to its deformable state, is contoured around the gasket supporting mandrel. In this manner, an inner circumferential groove is formed in the pipe and about the gasket so that the latter is disposed within the groove. After the pipe has cooled, the mandrel is withdrawn therefrom, leaving the gasket disposed within the formed groove. During this withdrawal process at least a portion of the gasket is initially outwardly deformed so that it may be easily removed from the recess formed in the mandrel. |
