Multi-type random-length automatic heat-sealing packaging machine

The utility model discloses a multi-type random-length automatic heat-seal packaging machine in the field of heat-seal packaging machines, which comprises two support frame plates, the bottoms of the two support frame plates are fixedly connected with support legs, and a roller conveyor is fixedly connected between the support frame plates. The servo motor can drive the lead screw to rotate, the sliding seat can be driven to reciprocate under threaded transmission, the position of the shear knife can be adjusted, packaging bags of different types and random lengths can be adjusted in real time according to actual requirements for thermoplastic blanking and cutting operation, adjustment is convenient and fast, the application range is wide, and practicability is high. And meanwhile, according to the thickness of a heat-shrinkable packaging bag, the lifting push rod can be used for pushing the heat-shrinkable air blower on the top to do lifting motion, heat-shrinkable operation on packaging bags with different