The working principle of thermoforming machine for food packaging
is that after the lower film is stretch-molded, the packaging material is filled into the lower mold cavity, and then returned to the sealing area for vacuum and vacuum inflation. Finally, the upper film and the lower film are heat sealed Then, the package is divided by cross-cutting and longitudinal-cutting. The packaged finished product will be transported to the next process, and the remaining waste film material will be recovered by the waste film winding system.
There are two main types of thermoforming machine for food packaging, vacuum packaging and modified atmosphere packaging.
Modified atmosphere packaging uses specific fresh-keeping gas such as N2, CO2, etc., and then uses the gas replacement technology to replace the air in the package, so as to achieve the requirements of product freshness. This kind of packaging has certain appearance sales advantages. It can also make different packaging boxes through the mold for packaging, which can attract buyers' attention.
Vacuum packaging is a direct vacuum for packaging. Compared with semi-automatic vacuum packaging equipment, it has a good vacuum effect.