Principle and flow of stretch film vacuum packing machine

Principle and flow of stretch film vacuum packing machine

The working principle of stretch film vacuum packing machine is relatively simple, that is, the stretch film vacuum sealing machine needs to use the molding mold, the film must be heated to a certain extent, and then the molding mold is used to fill the shape of the container, and then the product needs to be loaded into the molding of the lower mold cavity, and then vacuum packaging.

Stretch film vacuum packing machine mainly has four workflow, vacuum, heat sealing, air return and circulation. The following is a detailed introduction:

1.Vacuum: The vacuum chamber of the stretch-film vacuum packing machine is closed. The vacuum chamber starts to vacuum when the vacuum pump starts to work. At the same time, the vacuum in the packing bag is vacuum. At the same time of vacuum operation, the two-position three-way solenoid valve IDT works, the vacuum of the heat-sealed gas chamber is kept, and the hot-pressed frame is kept in place.

2. Heat sealing: IDT is broken, and the outside atmosphere enters the heat sealing chamber through the upper air inlet. The heat sealing chamber is inflated by the pressure difference between the vacuum chamber and the heat sealing chamber of the stretch film vacuum packing machine, so that the upper heat pressing frame moves down and the bag mouth is pressed. At the same time the heat sealing transformer work, start sealing; At the same time, the time relay 2SJ operates and after a few seconds, the heat seal ends.

3. return air: two two solenoid valve 2DT, the atmosphere into the vacuum chamber, stretch film vacuum packaging machine vacuum table pointer to zero, hot pressing frame rely on the reset spring reset, vacuum chamber open cover.

4. circulation: the vacuum chamber of the stretch film vacuum packing machine is moved to another vacuum chamber, that is, into the next working process, the left and right chambers work alternately, and the cycle repeats.