High frequency, high frequency heat sealing machine, why does the high frequency machine catch fire?

First. The principle of high frequency and high frequency heat sealing machine and the cause of ignition

High-frequency machines and high-frequency heat-sealing machines emit electromagnetic waves greater than 100KHz when they are in use. Under certain temperature and pressure conditions, they bond plastics through high-frequency oscillations generated by high-frequency tubes and high-frequency molds to achieve the purpose of packaging products. But It is very easy to catch fire during the plastic bonding process using a high-frequency machine, causing the plastic box to burn, the surrounding knife of the upper mold and the insulating plate of the lower mold to be damaged. The ignition of the high-frequency machine is caused by the high-frequency vibration of the mold and other substances (including It is a kind of discharge phenomenon caused by friction between dust and impurities in PVC plastics. Its harmfulness is a difficult problem that equipment manufacturers and users have been improving and overcoming. At present, there is no effective solution for the packaging industry.

1. The level adjustment of the mold is not enough. It is easy to cause ignition and damage to the mold.

2. If the high-frequency current is adjusted too high during the heat-sealing process, it is easy to cause the mold to catch fire.

3. The dust and black spots left by high-frequency mold flashover are not treated properly after the mold is fired.

4. The high-frequency upper mold starts to emit high-frequency machine current before it is completely in contact with the lower mold.

5. The bonding material on the surface of the high-frequency mold has not been properly treated

Second. High-frequency plastic heat-sealing machine, high-frequency heat-sealing machine, high-frequency capacitor chip sparking phenomenon

1. The adjustment of the high-frequency capacitor is too narrow, and the adjustment of the positive and negative capacitors is too close.

2. The adjustment of the three capacitors on the shock barrel is too narrow.

Third. High-frequency plastic heat-sealing machines, high-frequency heat-sealing machines need to know how to deal with various ignition phenomena that occur during production.

1. The level adjustment of high-frequency mold must be adjusted.

2. When the high-frequency mold is on fire, you must use a clean rag and add alcohol, gasoline, toluene, etc. to deal with the corresponding dust.

3. Every time a new mold is debugged, the current should be adjusted to 0.2A. Then use the coordinator to slowly adjust the current to a suitable current heat seal.

4. A certain bonding material must be used under the high-frequency mold. Soldering products required to effectively prevent high frequency re-breakdown.

5. The capacitor should not be adjusted too violently during the adjustment process, and the corresponding range should be adjusted slowly. If the edge of the capacitor is sparked during the production process, it may be that the edge of the capacitor is not cleaned and the aluminum plate is burred. Needs to be sanded smooth.

6. The sparking phenomenon in the production process of the oscillating barrel mainly includes flashover of capacitor plates and high-voltage tube sockets. The processing method is the same as that of the capacitor adjustment sheet.

Fourth. High-frequency plastic heat-sealing machine, how can high-frequency heat-sealing machine prevent ignition during production?

1. The ignition phenomenon of the high-frequency machine cannot be avoided, because it uses the principle of electromagnetic waves. It can only be said that the frequency of ignition is reduced to the lowest point, which is mainly related to the material. The material of the material is not easy to cause ignition. Phenomenon.

2. During the production process of the high-frequency machine, the oscillating barrel needs to be cleaned frequently, and it only needs to be blown by an air compressor.

3. The high-frequency machine selects the corresponding bonding material according to the characteristics of the material for the mold. Common insulating materials in the market include: insulating paper, PTFE, epoxy board, high temperature cloth, high temperature tape, silica gel, kraft paper, yellow wax paper and other bonding materials.

4. The stability of the high-frequency current is very important in the application process of the high-frequency machine, and the high-frequency machine with unstable current will frequently spark during the production process.

5. The high-frequency machine equipment should preferably be installed with the American 5557 spark tube protection. It is extremely sensitive and can instantly cut off the sparking phenomenon caused by the excessive current of the high-frequency machine.

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