Product outer packaging bag sealing machine

The utility model discloses a product outer packaging bag sealing machine which comprises a box body, a PLC is fixedly installed on the surface of the box body, a supporting plate is fixedly connected to the top of the box body, a frame is fixedly connected to the top of the supporting plate, and a lifting assembly is connected to the top of the frame in a penetrating mode. The bottom of the lifting assembly is movably connected with a mounting assembly. The limiting assembly is movably installed at the bottom of the installation assembly, the output ends of the two motors can be used for driving the two second fluted discs to rotate at the same time, and the second fluted discs rotate to drive the first threaded sleeve to rotate through the first fluted disc; the first threaded sleeve rotates to drive the two sets of transmission screws to move in the direction close to or away from each other, the transmission screws move to drive the connecting blocks to move through the limiting plates, the connecting blo