Bag opening vacuum sealing and cutting mechanism of vertical packaging machine

The utility model provides a vacuum sealing and cutting mechanism for a bag opening of a vertical packaging machine. The method is characterized in that the method is characterized by comprising the following steps; each of the two sealing and cutting mechanisms is provided with a fixed plate and a vacuum chamber pressing plate; the vacuum chamber pressing plate cylinder is fixedly arranged on thefixed plate; a cylinder rod of the vacuum chamber pressing plate cylinder is connected with and drives the vacuum chamber pressing plate; a closed-loop-shaped silica gel sealing strip is arranged onthe vacuum chamber pressing plate, the area in the silica gel sealing strip is a vacuum chamber area, a sealing plate is arranged in the vacuum chamber area and divided into an upper layer and a lowerlayer, a middle sealing plate interlayer is an open groove, a knife rest is fixedly connected to the vacuum chamber pressing plate, and a sealing plate air cylinder fixedly arranged on the knife restis connected with and drive