When packing food in a vacuum packaging machine, the problem we are most afraid of is inadequate packaging, which in turn causes gas to enter and cause food to become damp or moldy. When the vacuum packaging machine is sealing, there are many factors that can lead to improper sealing treatment, such as the vacuum time adjustment is too short, the seals are not effectively bonded together; the heat-sealed air chamber is broken; the temperature time adjustment is too low or too short. For these problems that occur in vacuum packaging machines, basically all can be improved by adjusting the relevant equipment of the equipment. In addition to the reasons just mentioned, the vacuum packaging machine's bad sealing phenomenon is also reflected in three aspects: the sealing of the packaging bag can not be sealed; under the action of the sealing knife pressure, although the bag is sealed, but slightly hard Squeezing or peeling, the seal will crack again; when the peeling test is performed on the seal, half of the seal is strong and half is separated. The quality of the seal of such a packaging bag is still unqualified because the contents are squeezed during storage and transportation. Pressure can easily be missed.
Vacuum packaging machines are used a lot, and the chance of encountering a failure is relatively large. If you want to choose a good vacuum packaging machine, you must not only understand its working principle and technology, but also understand its wearing parts and the role of various accessories in order to master its correct operation and maintenance methods. The heating belt plays an important role in the sealing of the packaging machine. It is one of the wearing parts of the equipment. It often burns out. what is the reason?
1. The vacuum packing machine with copper stigma is okay at the beginning, but it will be oxidized to black over time, so the heating belt is prone to burn out.
2. Programming issues. The correct heating step is to press the heating bar onto the sealed tube before it starts working. However, many manufacturers have been pursuing work efficiency and heating it before pressing, which causes the heating belt to dry out and be damaged.
3, heating belt material problems. Nickel chromium or iron chromium are commonly used today. Nickel-chromium is good quality and durable, but the price is much higher than iron chromium. The other is a stainless steel belt heater, which is poor in quality and easy to burn.
4. The transformer power is too small. If the vacuum time adjusted by the packaging machine is too short, excess air remaining in the room may also cause premature oxidation of the heating zone.