Features: 1. The whole machine adopts touch screen computer control, servo feeding, servo winding and accurate feeding, so as to achieve the effect of stable and non-stretching of high and low pressure film hot mouth; 2. Arbitrarily fixed length, automatic counting and configurable counting alarm. 3, automatic constant temperature makes the bag mouth seal firmly and smoothly. 5, hot mouth cooling adopts air cooling. 6. The ironing knife adopts mechanical movable ironing knife, and the heavy pressure knife rest ensures that the seal is firm and beautiful. 7. Manual tension is used for discharging, and frequency conversion automatic speed regulation is used for pneumatic feeding, so that the traction speed is uniform and stable.