The vacuum chamber is closed, the vacuum pump is working, the vacuum chamber starts to vacuumize, the packaging bag is vacuumized at the same time, the pointer of the vacuum gauge rises to the rated vacuum degree (controlled by the time relay ISJ), the vacuum pump stops working, and the vacuum stops. At the same time of vacuum operation, the two position three-way solenoid valve IDT works, the heat sealing chamber is vacuum, and the hot pressing frame remains in place.
The IDT is cut off, and the outside atmosphere enters the heat seal chamber through the upper air inlet. The pressure difference between the vacuum chamber and the heat seal chamber is used to inflate and expand the heat seal chamber, so that the upper heat pressure frame moves down and presses the bag mouth; at the same time, the heat seal transformer works and starts to seal; at the same time, the time, the time relay 2sj works, acts after a few seconds, and the heat seal ends.
The two position two-way solenoid valve 2DT is connected, the atmosphere enters the vacuum chamber, the pointer of the vacuum gauge returns to zero, the hot pressing frame relies on the return spring to return, and the vacuum chamber is opened.
Move the upper vacuum chamber to another vacuum chamber, that is to say, enter the next working process, and the left and right chambers work alternately and circularly.
Jiaozuo Fonfar Packing Machine
