Blow molded film process flow

The three-layer co extrusion blown film machine can continuously blow various LDPE, HDPE, LLDPE, MLLDPE, and Pa packaging films with a folding width of 800/1500 millimeters and a thickness of 0.08 millimeters using the flat extrusion blowing method. This film can be widely used in light and heavy packaging, such as various fresh fruits, meat foods, Pickled vegetables, fresh milk, liquid drinks, etc., due to its good shade resistance, moisture retention, moisture resistance, rain resistance, wind resistance, frost resistance, oxygen isolation, and oil resistance.

Blow molded film process flow:

1. Start the main motor and operate at low speed to extrude the molten material. After the material is extruded, connect the air pump to inflate and form a film bubble. Then immediately turn on the fan. (Adjust the air volume appropriately according to the frost line of the film bubble. If the air volume is too large, the film bubble will float upwards, and if the air volume is too small, the film cooling will not be good and the stiffness will not be good.).

2. Send the bubble tube into the traction spoke and follow the guide spoke until it is wound.

3. After completion, quickly observe whether the film bubble is deformed. If there is any deformation, adjust it in a timely manner. First, check whether the gap between the mold mouth is adjustable, whether the foam stabilizing plate is against the film bubble, and if there are no problems, check whether there are open doors and windows. If any problems are found, handle them promptly. Observe whether the membrane bubble is tilted, and if it is tilted, immediately block it with a baffle.

Some precautions to be taken when operating a professional three-layer or multi-layer co extrusion film blowing machine: It is important that the operator should not stand directly in front of the machine during operation to avoid accidents and damage to the operator. And during feeding, it is strictly prohibited to transfer metal impurities and other hard objects that may damage the machine into the machine barrel. When operating a rotating machine, it is prohibited to wear gloves to prevent injury from being caught up in the machine.

At present, PVC blow molding machines are considered the main production equipment for plastic packaging bags in cities, and they supply most of the plastic packaging bags in the city. The demand in our country is still very large. China's film blowing machines have a history of more than 20 years from research and development, application to development. It is based on the introduction of Japanese equipment, and through digestion and absorption, it can only produce film blowing machine equipment with a width of 400 millimeters in the initial stage and a speed of only 20 meters per minute. Currently, it can produce equipment with a speed of 150 meters per minute Blowing film machines with a width of less than 1000 millimeters and various types of blow film machines with over 100 segments per minute. In recent years, with the growth of demand, many blown film machines still need to be imported from abroad, indicating a significant gap between China and advanced foreign countries. Therefore, the film blowing machine still needs continuous innovation and development to produce more excellent products.