Common faults and maintenance of vacuum packaging machine

In recent years, the application of vacuum packaging machines in the market has reached a white-hot level. There are also various types of vacuum packaging machines on the market, such as internal vacuuming machines, external vacuuming machines, portable vacuuming machines, and desktop vacuuming machines. machine, double-chamber vacuuming machine, electric external pumping vacuum packaging machine, single-chamber vacuum packaging machine, external pumping vertical vacuum packaging machine, oil-cooled vacuuming machine, water-cooled vacuuming machine, floor-standing vacuuming machine, etc. However, a vacuum packaging machine with good quality and stable performance will have many equipment failures. We have classified the daily failures and troubleshooting methods as follows: 1. The whole machine does not operate with power supply, and the cause 1 , The voltage is too low, the fuse is blown, or the air switch is tripped; 2. The pump is stuck, or the pump motor is difficult to start (the temperature is too low, the pump oil is too thick): 3. When the power indicator light is on, the travel switch is misplaced or The emergency stop switch is in the emergency stop state; 4. The time delay of the vacuum time delay device is not enough. Elimination methods: 1. Especially when the 220V AC (single-phase) machine is used. Be sure to solve the problem of using low voltage and low voltage, generally not lower than 190V under load; 2. Check whether the pump is mechanically stuck, and at the same time pay attention to check whether the oil is blocked due to too low temperature or the motor wiring is reliable. 3. Find out the possibility of failure of each part, and eliminate or replace it. It is strictly forbidden to disassemble it. Second, it cannot reach the specified limit vacuum degree (the vacuum degree is not good) (from the vacuum table, the vacuum 1. The vacuum pump oil is too little or polluted; 2. The vacuum main pipeline pump emits smoke or air leaks, and the gas path is not tightly closed; 3. The vacuum time is too short; 4. The vacuum chamber The distance between the heating row and the two planes of the silicone strip (the gap between the upper and lower heating rows) is too small, which causes the bag mouth to be clamped or partially squeezed during vacuuming, which inhibits the air degassing in the bag. Removal method 1. Check the pump 2. When the machine is pumped to the highest vacuum pressure, turn off the main power supply, check for leaks by ear listening, hand touch, etc., and deal with it in time; 3. Adjust the vacuum delayer to prolong the vacuum 4. Replace the sealing strip of the chamber cover; 5. Properly adjust the pressure plate springs at both ends of the air bag assembly, or check whether the air bag (heat sealing) solenoid valve is working properly 3. Reasons for poor sealing quality 1. The cooling time is too short 2. The temperature is too high or too low; 3. The position of the upper and lower heating rows does not match; 4. The air bag is leaking and the pressure of the bag is not enough; , the surface has scars or burns. Remedy 1. Adjust the cooling delay device to extend the time; 2. Adjust the sealing time and voltage, generally according to the heat sealing performance of the composite bag, pay attention to the consistency of the pressure and time: 3. Adjust the position of the heating rubber strip: 4 , Replace the airbag; 5. Replace the high temperature cloth, heating sheet and install it reliably 4. The automatic program of the whole machine cannot run completely, and the program does not turn down. Reasons 1. Vacuum delay → sealing delay → cooling delay, these three delays If one of the timers is damaged, the program will not be transferred. 2. A certain delayer is loosely connected to the socket or a certain part is in poor contact. Elimination methods 1. According to the principle working sequence of the vacuum packaging machine, in which step the program does not turn or stops, that is, the delayer is replaced; 2. Eliminate looseness and poor contact. After the machine is debugged normally, for each type of machine, it must be ensured that as long as the machine (sound) or the vacuum pump is started, the vacuum chamber cover must be sucked into the lower chamber or the flat plate immediately, otherwise there will be 'no load'. heating' phenomenon. 3. If it is found that the chamber cover cannot be sucked into the lower chamber by the pressing force, press the emergency stop button immediately to check the reason, whether KT1 has no delay time, or KT3 does not release after delay.

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