| 摘要 |
<p>A nozzle (14) has a valve pin (30) for controlling flow of molding material through a nozzle melt passage. An actuator (38) has a stationary part (98) and a movable part (99). The actuator (38) further has an extending rod (90) connected to the movable part (99) thereof and a block (92) connected to the rod (90), the block (92) being movable with the moveable part (99) of the actuator (38). A pivoting linkage element (36) is rotatably connected to the block (92) of the actuator and is connected to the valve pin of the nozzle. The pivoting linkage (36) element moves the valve pin in response to movement of the movable part of the actuator. A bracket (202) is connected to the stationary part (98) of the actuator (38). Two sensors (206,208) are connected to the bracket (202) for detecting different positions of the block (92). The sensors may be air proximity sensors.</p> |
