Why And How To Eliminate The General Failure Of Plastic Welding Machine?

1、 Press the welding button and the machine will not operate.

1. The switch of welding machine is not turned on.

2. The power supply of the welding machine is not turned on.

3. The air source of the welding machine is abnormal.

4. The travel switch of the welding machine is not in place.

5. The solenoid valve is broken.

6. The signal line of the welding machine is not in good contact. ① Turn on the welding machine switch. ② Turn on the welding machine. ③ Check and adjust the air source. ④ Adjust the travel switch. ⑤ Replace the solenoid valve. ⑥ Check the wiring connection.

2、 The welding machine does not come down.

1. The manual and automatic switch of the welding machine is in the manual position.

2. Poor contact of time digital switch.

3. The air pressure is too low.

4. Control board fault ① turn the switch to the automatic position. ② Check the time digital switch. ③ Adjust the air pressure. ④ Overhaul control circuit

3、 Machine vibration

1. Welding time: poor contact

2. Vibration generating plate and optocoupler failure

3. Time control board failure: ① switch the welding time switch and replace it; ② replace the photocouple and overhaul the vibration generating plate; ③ overhaul the time control board

4、 Excessive no-load current and overload (above 1a)

1. Welding head is not locked

2. Poor sound wave adjustment.

3. Mold mismatch or mold crack.

4. If there is no welding head and the current is large, the transducer has cracks

5. The characteristics of the power tube are changed or burned

6. There is a fault in the power amplification circuit ① lock the welding head ② press the sound wave inspection button and adjust the sound wave adjustment screw to minimize the current indication. (please refer to other relevant contents) ③ replace the mold. ④ Replace relevant parts. ⑤ Overhaul the power tube. ⑥ Overhaul power amplifier circuit

5、 When welding, the current is too large and overload (above 7a) 1. The air pressure is too high. 2. The output gear is too large and the impact current is large. 3. Buffer is too small

4. High trigger pressure and long delay time ① reduce the air pressure. ② Lower the gear. ③ Increase the buffer. ④ Reduce delay time

6、 No welding, no vibration (normal power supply)

1. The crystal plate (tube) is broken.

2. The vibrating plate is broken.

3. Welding overload protection.

4. The output fuse is broken.

5. The gear switch is at position 0 or the contact is poor.

6. The output line is not connected properly. ① Replace the crystal plate (tube). (attachment: maintenance method of crystal plate (tube) ② Replace the vibrating plate. ③ Adjust the sound wave, gear and pressure. ④ Replace the fuse. ⑤ Adjust the gear switch.