| 摘要 |
<p>The method wherein a) a pressure is injected into the supply (2) in the funnel-shaped inlet (4) for initiating the filling and fluidization of the mould material, b) a pressure is established above the supply for insertion of mould material through the inlet, and c) the fluidization pressure and the insertion pressure are controlled independently, is achieved by means of an apparatus comprising a mould chamber (8) with pressure plates (11, 12) movable towards each other, to which plates mould plates (9,10) are fastened, and in which the mould chamber (8) can be connected through one or more passage apertures (14, 18) partly with a supply of mould material (2) being under pressure, partly with a vacuum source (16) and a pressure source (17) respectively.</p> |
