| 摘要 |
The vent nozzle for foundry moulds and injection die-casting dies is to be inserted into the walls of the mould or die, the nozzle body having a top plate arranged on the moulding-material side (2) and being provided with openings. The nozzle body (4, 4a) has at least one head piece (5, 5a, b, c) of solid construction with recesses (6, 6a, 18, 19) arranged on the circumference and an annular constriction (7) adjoining the recesses on the gas outlet side. <IMAGE>
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