On-line injection device for melt direct spinning and chip spinning

The utility model discloses an on-line injection device for melt direct spinning and chip spinning, which comprises a master batch drying system, a screw rod extruding machine, a metering injection pump device, a master batch pipeline, a polyester pipeline, a metering pump, a temperature-adjustable liquid phase hot oil guide pipeline, a three-way valve, a static mixer and a dynamic mixer, wherein an outlet of the metering pump is a spinning component connecting port, an outlet of the master batch drying system is connected with the screw rod extruding machine, the screw rod extruding machine is connected with the master batch pipeline, the metering injection pump device, the temperature-adjustable liquid phase hot oil guide pipeline and the three-way valve are sequentially arranged on the master batch pipeline, and the master batch pipeline is connected with an inlet of the metering pump through the static mixer and the dynamic mixer after being communicated with the polyester pipeline. The on-line injection device has the advantages of being short in master batch melt stop time, controllable in temperature, good in mixing effect, suitable for various small-scale differentiated fiber spinning tests and the like.