A film blowing machine is a machine used to manufacture […]
A film blowing machine is a machine used to manufacture plastic films. It can be used to produce films for different purposes such as packaging, food and beverage packaging, liquid beverage packaging and medical supplies. Many different types of plastic are used in the production process. A film can be made from low-density polyethylene (LDPE), linear polyethylene (LDPE) or high-pressure polyethylene (HPPE). It can also be produced from various materials, such as nylon, acrylic, and ethylene vinyl acetate (EVA).
Blown films have good mechanical properties and are widely used in the packaging industry. They are also treated to remove static electricity. However, the performance of the blown film is closely related to the production process parameters. If the parameters are not controlled properly, alternate problems could occur. Therefore, it is important to maintain a uniform temperature and to make sure that the film forming performance is optimal.
In order to produce a good blown film, you need to make sure that the correct plastic particles are selected. In addition, you need to make sure that the extruder's temperature is controlled correctly. If the temperature is too low, poor plasticization can take place, resulting in a poor stretch. The tensile strength of the film can also be affected.
A film blowing machine has a number of components that include the die, the barrel, the nip rollers, the screw and the winding unit. It can also be equipped with an electrical control system. This helps in maintaining proper temperature at the die and in the film tube. The nip rolls help in transporting the film to the in-line slitters. A cooling fan or surface cooler can also be included in the system.
The blown film machine can be equipped with a hydraulic automatic screen exchanger. This allows the operator to exchange filter screens at one port while the other port is working. This process is fast and smooth. The manual screen exchange is also possible. But, it is recommended to stop the machine before replacing the filter. This can increase production costs and waste time.