| 摘要 |
<p>Closure assembly (10), of the type with a multi-rod drive, for the injection moulding of plastic material (MP), comprising: a plurality of closing rods (12-1, 12-2) each associated with a respective nozzle or injection unit (11-1, 11-2) for the injection of the plastic material (MP) into a mould (20), and a driving plate (13), common to the plurality of closing rods, wherein the driving plate (13) is adapted to move between an open position (P1) and a closed position (P2), between a bottom plate (14) and the mould (20), to contemporarily drive the plurality of closing rods (12-1, 12-2) between a corresponding open (?1') and closed (?2') position respectively to open and to close an injection hole (18) of the injection unit (11-1, 11-2), and wherein there are provided disconnecting and fixing means (40, 41 ) associated with each closing rod (12-2, 12-2) for disconnecting it from the driving plate (13), independently from the other closing rods, and to firmly fix it, once disconnected, on a side (20a) of the mould (20). Advantageously, the closure assembly allows an easy disconnection of a closing rod (12-1 ), for instance because defective or following a failure of it, from the driving plate (13), and at the same time allows that the other closing rods (12-2), that remain connected to the driving plate (13), can continue to be used to inject, through the respective injection unit (11-2), the plastic material (MP) into the mould (20).</p> |
