1、 Faults during welding
Solution to the cause of the phenomenon
Excessive fusion
Input plastic parts
Too much energy
1. Reduce air pressure
2. Reduce welding time
3. Reduce the number of amplitude segments
4. Replace the low multiple secondary pole
Insufficient fusion
Input plastic parts
Too little energy
1. Increase the air pressure
2. Longer welding time
3. Increase the number of amplitude segments
4. Replace the high multiple secondary pole
5. Use larger power models
Inconsistent welding effect
1. Injection mold
2. Material and proportion
1. Injection mold change
2. Use water pipe material or secondary material
3. Change of filling proportion
Non fusion surface damage
1. The welding head does not match with the plastic contact surface
2. Ultrasonic concentration
damage
1. Repair the welding head and bottom mold to make it match with the plastic parts
2. Repair the welding head and keep away from the air at relevant positions
Plastic parts cracked and broken
1. Ultrasonic amplitude
Too large;
2. Strength of plastic parts
Not enough
1. Select low multiple secondary bar
2. Reduce the output amplitude
3. Reinforcement or thickening of plastics
Plastic part surface perforation
1. The ultrasonic amplitude is not enough, which is caused by ultra long time welding;
2. Concentrated ultrasonic damage
1. Increase the output amplitude and reduce the welding time. If necessary, replace the machine with higher power
2. Avoid empty position of welding head
3. Thickness or reinforcement of plastic parts
2、 Machine failure
Solution to phenomenon causes
No display when power is turned on
Fuse blown
1. Check the power tube
Whether there is short circuit;
2. Replace the fuse
There is no current display in ultrasonic testing
1. Power tube burned
2. High voltage capacitor burn out
3. Part of the relay control circuit is faulty
Replace relevant burned parts
Ultrasonic testing current is too large and overload
1. The welding head is not locked or cracked;
2. If there is no welding head and the current is large, this energy exchange
Aging or cracking of the device or secondary rod;
3. The characteristics of the power tube are changed or burned out;
4. Part of the power amplifier circuit is faulty
Replace relevant parts
Excessive current and overload during welding
1. The air pressure is on the high side;
2. If the welding head is too large, the impact current is large;
3. High trigger pressure and long delay time;
4. High secondary pole ratio
1. Lower the air pressure;
2. Use higher power model;
3. Reduce the trigger pressure and delay time;
4. Change to low multiple secondary pole
Trigger switch welding head does not fall
1. The emergency stop switch is not reset;
2. The trigger switch cannot be triggered at the same time or one of them has poor contact;
3. There is something wrong with the program control board
1. Reset the emergency stop switch;
2. Detection enables two trigger switches to trigger simultaneously;
3. Check the program board for troubleshooting, generally IC problem
After the switch is triggered, the ultrasonic time is very long
When welding time or pressure holding time band switch is off, adjust band switch contact to make it contact well
What is ultrasonic welding?
Ultrasonic welding is to transfer high frequency vibration wave to the surfaces of two objects to be welded. Under pressure, the surfaces of two objects rub against each other to form the fusion between molecular layers.
Advantages of ultrasonic welding:
High welding speed, high welding strength and good sealing performance;
Instead of the traditional welding / bonding process, it has the advantages of low cost, clean, pollution-free and no damage to the workpiece
The welding process is stable, all welding parameters can be tracked and monitored through the software system, once the fault is found, it is easy to remove and maintain.