High-frequency preheating machine plays a vital role in the production of melamine tableware. The melamine powder preheating by HF preheater can enhance the fluidity of the powder, shorten the die-casting time of the melamine molding machine, improve the smoothness of the finished product, save the amount of melamine powder, and extend the life of the melamine compression mold.

In order to ensure normal production, Shunhao Factory has sorted out the situations and solutions that may be encountered during the use of the HF preheater. There are 8 situations as follow.

1. The power light is off or flickering, and the control transformer is broken. Replace the control transformer.

2. The high pressure is turned on, the air switch is protected (tripped), and the electronic tube is broken. Replace the electronic tube.

3. The power light is off, the fan works normally, but the wind pressure switch fails to close, the anode heat sink of the electron tube is blocked by dust, and the wind blown by the fan fails to blow the wind pressure switch. Use the air gun to blow away the dust.

4. Turning on the high frequency will interfere with the temperature control. Adjust the position of the inductance, and the degree of tightness.

5. When the anode current is too large when working. Adjust the air capacitance distance of the oscillation chamber. The closer the current is, the larger the current, and the farther the smaller, which is basically maintained at about 21 mm.

6. When the machine sparks in the heating chamber, the upper cover will automatically open and the buzzer will alarm. First use an air gun to remove the metal impurities in the heating chamber, and clean the ignition area with alcohol.

7. The heating frequency is low. Adjust the pole rate, and adjust the hole position of the large inductance.

8. The anode current gradually increases, and the electron tube is damaged. Replace the electron tube.

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