Vacuum packaging machines are often used in the food industry because after vacuum packaging, foods are resistant to oxidation for long-term storage. First, the vacuum packaging machine bag can not be sealed, the possible reasons are as follows:
1. The heat sealing switch of the vacuum packaging machine control panel is not selected, or the heating power is not turned on.
2. The heating element of the packaging machine is damaged, or the power supply connection of the heating element is broken.
3. There is a problem with the panel setting and the heating time is set to 0.
4. The control component has a problem and the heating time relay is damaged.
5, solenoid valve failure: the sealing solenoid valve does not move, the airbag does not bulge (or the airbag is damaged)
Second, the sealing of the packaging bag is uneven, there are air bubbles in the sealing line, and the sealing is not firm. The possible reasons are as follows:
1. Rolling vacuum packaging machine, vacuum chamber sealing strip is not clean enough, there are dirty things or other foreign objects.
2. The set heating time or temperature is too low to seal well.
3. The airbag of the vacuum machine is not strong enough to cause the sealing line to be pressed tightly.
4. The cooling time set by the control panel is not enough, causing the sealing line to shrink and have bubbles.
5. The heating strip is damaged and the surface is not flat enough.