| 摘要 |
<p>A mould for casting ceramic slip material comprises a portion 15, 16, 17, which is adapted for casting a hollow region in the article, such as a box flush-water rim 31 of a water closet bowl, having projections 30 made of non-casting material the free ends of which project into the mould cavity where the hollow cast region will be formed, the projections being removable after casting to leave precise, clean holes or slots in the wall of the hollow region. The projections which may be located in core pieces 15, 16, 17, for forming the bowl of a w.c., may be made of resilient material so that they flex during removal to avoid damaging the soft cast material. <IMAGE></p> |
