| 摘要 |
<p>There is provided at the mouth of a sand-supplying hopper (8) and under a hatch (6) metering supply of such sand, a motor (9) mounted on a support (10) and with a plate (15) to protect it from sand discharges, driving a series of lower vanes (12) that spread out and level the sand within the compacting chamber (4). The discharge valve is placed annularly outside the hopper and is assisted by an annular stopper (26), that has a dihedral front for closing the likewise annular aperture (18) and that plays within a housing (25) of a support ring (22).</p> |
