本发明公开了用于塑料挤出系统熔体净化的啮合传动式过滤器,包括有进料端机体和出料端机体,过滤网板通过旋转中心轴设置在进料端机体和出料端机体之间,过滤网板圆周边缘设置有齿牙,传动齿轮与过滤网板的齿牙啮合,传动齿轮通过传动齿轮轴与单向传动装置连接,单向传动装置通过转动摇臂与气动驱动装置连接,气动驱动装置包括有驱动气缸,驱动气缸带动转动摇臂绕一铰轴点往复运动,在转动摇 The invention discloses an engagement transmission type filter used for melt purification of a plastic extrusion system, which comprises a feed end body and a discharge end body, wherein the filter screen plate is arranged on the feed end body and the discharge end body through a rotation central axis The gear wheel is meshed with the teeth of the filter board, the transmission gear is connected with the one-way transmission device through the transmission gear shaft, and the one-way transmission device is connected with the pneumatic drive device by rotating the rocker arm. , The pneumatic drive device includes a driving cylinder, the driving cylinder drives the rotating rocker to reciprocate around a hinge point,