| 摘要 |
<p>The invention provides mould apparatus (1), comprising an outer part (3) and a core (4), the core (4) defining in a moulding (2) a bore (5) including an undercut (6), characterised in that the core (4) comprises a first surface (18b), disposed on a first portion (7) of the core (4) a second surface (12a), and a third surface (13a) both disposed on a second portion (8) of the core (4) which together define the bore (5) and the undercut (6), the first surface (18b) further defining in use a gap in the undercut (6) through which the first surface (18b) and the second surface (12a) can be withdrawn. <IMAGE></p> |
