If the extrusion temperature is too high, the fluidity of the molten resin is too large, the viscosity is too small, and it is easy to fluctuate; adjust the extrusion temperature; if the extrusion temperature is too low, the discharge volume is small; adjust the extrusion temperature. The air volume of the cooling air ring is unstable, and the cooling of the film bubble is uneven; check the cooling air ring to ensure that the air supply volume around is uniform;
It is disturbed and affected by strong external airflow. Prevent and reduce the interference of external airflow. The film blowing machine for fine printing will be more complicated, and the PE film blowing machine for unprinted inner film bag will be simpler. Both models should pay attention to one point, which is the output and thickness uniformity. The first one should determine the size of the die lip according to the usual thickness of the film produced, and it is generally equipped with a rotary die head.
The price of the film blowing machine ranges from tens of thousands to millions. It mainly depends on the purpose of your product and how large the film is needed. The wider the film, the higher the price. Different uses require different configurations, such as supermarket shopping bags, agricultural mulch films, vegetable market bags, etc.
Basically, they will first ask you what products you mainly make, and then recommend a suitable machine for you. Do not lift the membrane when opening it, remove the air ring, put the level ruler on the membrane head, open the rotating membrane head, and observe the level ruler scale. If there is a significant change, the rotating head is not installed properly, or there is a problem with it. If there is no significant change, the problem must be with the air ring, and the air volume is uneven. Or there is a problem with the membrane head flow channel.