| 摘要 |
A method of moulding a generally cylindrical plastic piece (20) with external relief elements (21, 22) made of a different material than the base cylindrical section uses a mould with a first chamber (10) with outer cylindrical shape and /-1 other cavity (11, 12) outside it. A sliding skirt (15) inside the outer cylindrical wall of the mould closes the outer cavities when in its raised position but leaves them completely free in its lower position. The moulding comprises (i) injecting, with the skirt in the raised position, a first material into the outer cavities (11, 12); and (ii) lowering the skirt and injecting a second material in the first cavity (10). Also claimed are parts so obtained.
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