Although I don't know what kind of packaging machine you are, the products we produce also have such problems, but every operator can solve them. But I think the principle of problems is the same. 1. You need to check whether your former and sealing pliers are aligned. 2. Whether the sealing pliers act normally. 3. Whether the mechanism pulling the packaging material pulls down the films on both sides. 4. Is there an exhaust mechanism? If there is an exhaust device under the sealing pliers, please check the position of the exhaust device. 5. The last two points of the position of the blanking slide plate need to be adjusted by experience. I hope it helps you.