| 摘要 |
<p>A nozzle (10) has, inside a nozzle body (20), at least one flow channel (30) for an injection molding compound to be processed. At the bottom end, the channel (30) is flow-connected via a nozzle mouthpiece (40) and via an insert (50) to a mold cavity of an injection molding tool, said mold cavity being formed by at least one mold insert (12, 13). The manufactured insert (50) is placed in the nozzle mouthpiece (40) while being able to be longitudinally displaced in a limited manner in the bottom end of the flow channel (30). In a needle shut-off nozzle (10), a moving shut-off needle (60) passes through the melt channel (30) and the insert (50), which forms a centering body inside of which an inlet cone (54) centers the actual shut-off part (65) of the needle (60). The nozzle mouthpiece (40), which surrounds the upper part (53) of the insert (50), can be screwed from underneath into the nozzle body (20). Or the nozzle mouthpiece (40) and the insert (50) are formed as a single piece and both are placed together inside the nozzle body (20) in a manner that enables them to longitudinally displaced. In order for the nozzle mouthpiece (40) and/or the insert (50) to find a fixed hold, the insert or centering body (50) has a supporting flange (52).</p> |
