High frequency preheating machine is widely used in the molding industry, such as semiconductor discrete electronic components, integrated circuits, motor commutator, and melamine imitation porcelain tableware, plastic electric appliance, etc.

Advantages: The heating by High Frequency Preheater can increase the strong liquidity, shorten the casting time, eliminate stress in materials, eliminating water lines and improve the finished products’ bright and clean degree, save material dosage, extend the die life.

Today Shunhao Factory will share with you the common problems and troubleshooting you may meet in operation.

• The cover doesn’t open

1.The panel power light does not light up, and the fan does not work

Inspection scope: fan and fan capacitor, isolation transformer, 3A fuse and power supply.

2. The panel power light is off and the fan is working

Inspection scope: wind pressure switch, control transformer, and whether the power supply lacks phase.

3. The panel power light is on and there is no reminder to open the cover

Inspection scope: WR main control relay, MSI AC contactor.

4. The panel power light is on and there is a reminder to open the cover.

Inspection scope: motor and motor capacitor.

• The cover doesn’t close

Inspection scope: 2TR time relay, shutdown button, ZR anti-extrusion relay and its wiring, OCR anti-overcurrent relay and its wiring, MR reset relay and its wiring, WR main control relay and its wiring, start button, 4TR time relay, The motor and its motor capacitance.

• Automatic cover opening after high frequency is turned on

1. Disconnect the wire from the silicon stack to the electron tube, if the test machine jumps out

Inspection scope: silicon stack, high voltage transformer.

2. Disconnect the wire from the silicon stack to the electron tube, if the test machine does not jump out to open

Inspection scope: in the oscillation chamber (500pF capacitor, 300pF capacitor, electronic tube, 4kΩ resistor).

• The alarm will automatically open the cover after the high frequency is turned on

Inspection scope: ignition on the work surface, ignition in the oscillation chamber, OCR overcurrent protection circuit and the scope of items A and B mentioned in the previous article.

Suggestions for Choosing Preheating Machine

▲150 tons-250 tons melamine molding machine: 5KW/7KW preheating machine

▲Machines above 300 tons level: 10KW preheating machine

★ Canon tube is the main part of the preheater machine, which is originally imported from Japan.

Top quality of the melamine preheaters machines. Welcome to buy from Shunhao Company!