APPARATUS AND METHOD FOR MANUFACTURING A SPIGOT END OF A PIPE PART PROVIDED WITH A SEALING RING

摘要

Apparatus for manufacturing a spigot end (12) which is provided with a sealing ring (9). The apparatus comprises an outer mould (1) for forming the outer contour of the sealing ring (9) and for forming the outer side of the spigot end (12), and a core for forming the inner side of the spigot end (12) and the sealing ring (9). The core comprises a first core part (7a), a sleeve-like core part (7) which can be displaced on the first core part (7a), for forming a front for the sealing ring (9), a core part (8) which adjoins the first core part (7a) and can be contracted in the radial direction, for forming the inner contour of the sealing ring (9), and a second core part (6), which adjoins the contractable core part (8), for forming the inner side of the pipe part. The contracatable core part (8) has a radially innermost position with an external diameter which is smaller than the internal diameter of the sleeve-like core part (7).