Bottom seal shearing mechanism for yeast packaging machine

The utility model relates to the technical field of packaging devices, and discloses a bottom seal shearing mechanism for a yeast packaging machine, which comprises a conveying component, and the middle upper parts of the left and right sides of the conveying component are fixedly connected to the bottom ends of the left and right sides in a fixed seat respectively. According to the packaging bag sealing device, the first air cylinder drives the sealing electric heating block on the first mounting plate to seal a packaging bag, the packaging bag is conveyed to the lower end of the second mounting plate after being sealed, then the second air cylinder drives the cutting knife to move to cut the sealing joint of the packaging bag, the working efficiency is high, and the operation stability is good; meanwhile, a fan is drawn through an output pipe, harmful gas generated by thermal shrinkage enters an air collecting box through a through hole, then particulate matter in the harmful gas is adsorbed and filtered th