1C31234G01

1C31234G01
1C31234G01
1C31234G01
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故障分析：现场观察注塑机在变频下的工作状态，发现变频器在注塑机开模动作时运行频率在40hz以上，到托模时就只有几赫兹运行，故障应该就出在这里。经过与注塑机维修人员的技术交流，从他口中得知：“做这个旋盖制品的模具是带有螺纹的，这要用到注塑机上的绞牙功能如下图3所示，要想取出制品必须通过绞牙旋转的方式，在整个注塑成型工序中绞牙的动作和顶针动作发生的时间点差不多；而绞牙功能是通过一个独立的电磁阀控制，而这个电磁阀是不受注塑机主信号的控制。”分析到这里应该明白故障的原因了。

　　（4）故障排除：在故障分析里面我们提到绞牙功能的动作是由一个独立的电磁阀（dc24v）控制，我们只要在这个电磁阀上并一个直流继电器，然后从直流继电器上取一个常开信号到变频器多功能输入端子做一个多段速控制，由于绞牙功能用到的压力很大，现场尝试把变频器多段速频率设定为45hz都不能成功，设定为50hz频率后，才能保证注塑机正常生产。

　　3.6 案例六——故障信息：射胶动作时螺杆振动

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