| 摘要 |
<p>Making a centring sleeve for a ring-shaped element. The installation according to the invention comprises, firstly, a moulding device consisting of a mould core and a mould body surrounding the mould core at a distance in order to define a ring-shaped space, and, secondly, a mould cover (5) capable of rotation about its main axis and intended to be positioned on the concrete cast in the ring-shaped space, the said cover being mounted on a piston head (1) which is able to ascend and descend and is capable of forming a centring sleeve in the frontal region of the ring-shaped element, characterised in that the mould cover (5) is connected to the piston head (1) by a temporary coupling device which, by opening and closing, effects the gripping or the release of the mould cover (5). Application to installations and processes for making ring-shaped elements from concrete. <IMAGE></p> |
