| 摘要 |
<p>In moulding a sealing assembly which is to be placed inside a socket end of a pipe joint and which comprises a sealing ring made of an elastomeric material and a retaining ring (5) made of relatively stiff thermoplastic material, the retaining ring (5) is first moulded in a first mould cavity of a mould. The sealing ring (4) is then moulded in a second mould cavity (10) which is partly bounded by a portion of the retaining ring (5). In this connection, the second mould cavity (10) is sealed at the position of the junction between the retaining ring (5) and the other inside wall parts of the second mould cavity (10) as a result of the retaining ring (5) being clamped on the inside onto a core part (12) of the mould, which core part (12) projects into the retaining ring (5) and moulds the inside of the sealing ring (4), and of an outer part (13) of the mould, which outer part (13) forms the outside of the sealing ring (4), being clamped against the outside of the retaining ring (5).</p> |
