Divided by production materials:
Plastic bag making machine: mainly processing plastic films such as polyethylene (PE) and polypropylene (PP), producing food bags, garbage bags, etc. The sealing and cutting method is mostly heat sealing.
Non woven bag making machine: specialized in processing non-woven materials, using ultrasonic welding technology instead of needle and thread stitching, commonly used for making environmentally friendly shopping bags and handbags.
Paper bag machine: used for producing paper packaging bags such as kraft paper and white cardboard, such as clothing bags and food paper bags. Some high-end models support automatic gluing and bottom pasting.

Divided by bag shape:
Common types include flat pockets, vest bags (vest bags), three-dimensional bags (square bottom bags), zipper bags, and tote bags with ropes. Different bag types require corresponding molds and sealing mechanisms.

Classified by degree of automation:
Divided into single machine and automatic production lines, fully automatic models are usually equipped with touch screens, photoelectric tracking, and automatic counting functions, requiring only 1 to 2 people to operate. ‌‌
How does the machine work

Basic process:
The machine first unfolds the rolled material (such as film or non-woven fabric) through the unwinding rack, and then introduces it into the forming machine through the guide roller to fold it into a cylindrical shape or a specific shape.
Subsequently, the side overlap sealing is completed through a longitudinal sealer. If the material needs to be filled, it is measured and filled at this time. Finally, the transverse sealer is used for heat sealing or ultrasonic welding and cutting to form independent bags.
The finished product is sent out by a conveyor belt, and the waste part can be automatically recycled. The entire process is controlled by a computer or PLC system for length and positioning.

Key technical details:
Hot pressing and anti sticking: A new patented technology adds a thermal insulation layer between the hot sealing mechanism and the film material to prevent direct adhesion between the hot knife and the film material, ensuring the bagging effect.

Feed control: Some square bottom bag making machines use hydraulic rods and grippers to achieve fast and stable automatic feeding, reducing manual intervention.
Tension adjustment: By using magnetic powder brakes, swing rollers, and sensors, the tension of the material is maintained stable during transportation, preventing wrinkles or strains. ‌‌‌
What should beginners pay attention to when operating

Parameter settings:
Temperature control: Preheat the barrel and mold before starting up, and keep them warm for more than 20 minutes after reaching the process temperature to ensure uniform temperature. Different materials require different sealing and cutting temperatures.

Length adjustment: Set the bag making length by adjusting the position of the connecting rod sleeve on the eccentric drag plate or servo system parameters. After six months of continuous production, check whether the overrunning clutch is worn.

Safety and Maintenance:
Safety door: The safety door must be used during operation. If the travel switch fails, it is strictly prohibited to turn on the machine. During maintenance, the power must be cut off and the danger zone must be avoided.

Tool adjustment: The tightness of the cutting tool can be adjusted by adjusting the screw to eliminate difficult cutting phenomena, and the distance between the welding line and the cutting line is generally maintained at 5-10mm.

Exception handling: If any abnormal noise, odor or oil leakage is found during operation, the machine should be stopped immediately for inspection. It is not allowed to directly touch high-temperature parts with hands when cleaning the mold. ‌‌