Essentials Of Ultrasonic Plastic Welder

Note that the welding head cannot be modified arbitrarily, otherwise it will change its resonance frequency and mechanical strength, which will easily cause damage to the transducer or electrical parts.

Essentials of Ultrasonic Welder Machine Operation:

The working principle of the ultrasonic plastic welder:

The 220V/50HZ power supply is converted into 20KHz or 15KHz high-voltage electric energy, and the transducer is converted into mechanical energy. The mechanical vibration is amplified by the secondary rod and transmitted to the workpiece through the welding head. The air pressure is used to generate the contact surface of the workpiece. The effect of pressure friction welding.

Installation procedure:

A: Connect the three cables on the rack to the sockets of the base and generator respectively, and tighten them.

B: Install the transducer system and tighten the fixing screws.

C: Adjust the height of the frame and tighten the body fixing handle.

D: Observe whether the emergency stop switch on the base is reset, if not, please reset it.

E: Connect the air source and power source, and connect the ground wire.

F: Wipe clean the contact surface between the welding head and the secondary rod, apply a small amount of silicone oil or butter on the two end surfaces, screw the screw into the welding head and tighten it, and then connect the welding head with the secondary rod, which is the slaughter screw. , And lock it with a wrench.

G: Before operation, be sure to do ultrasonic testing to make sure that the generator frequency is consistent with the mechanical resonance frequency of the transducer system. Especially after changing the welding head or changing the output amplitude, it should not be neglected.

Ultrasonic testing:

In order to achieve the best use effect and maintain the performance of the machine, it is very important to adjust the resonance of the generator and transducer system.

A: Before tuning, make sure that the welding head and the secondary rod must be locked tightly. When tuning, do not touch other objects with the welding head.

B: Turn on the power switch, and the power indicator light is on.

C: Press the ultrasonic test switch, and look at the load meter, (if the ammeter pointer exceeds 30% or exceeds 2A, the time to press the ultrasonic test switch is very short), adjust the tuning inductance, and rotate left and right until the load meter is in the minimum position , Usually between 5%-15% or 300MA-900MA.

D: Because the ultrasonic plastic welder is equipped with a card slot, the adjustment range of the tuning inductance is only 360 degrees. If the frequency of the welding head is far from 20KHZ or 15KHZ, you need to open the cover and remove the fixed position for adjustment.

Notice

(1): When adjusting the tuning inductance, the current change of the load meter does not indicate the power output, but only the resonance degree of the ultrasonic welding generator and ultrasound welding transducer system. (The smaller the current, the greater the resonance.

good). If you need a larger amplitude output, you can change the type of secondary rod. (15KHz ultrasonic plastic welder can also adjust the amplitude adjustment switch, but it is not allowed to adjust the amplitude adjustment switch when there is ultrasound, so as to prevent

High voltage shock. )

(2): When the load meter is no-load, it indicates the degree of resonance; when it is loaded, it indicates the output energy.

(3): During tuning, if the overload indicator is on, immediately release the test switch. After 5 seconds, adjust the tuning inductance and perform ultrasonic testing again.

(4): Correct tuning is very important. If the normal condition cannot be reached, please refer to the fault detection table. Do not use it reluctantly to avoid damage to the ultrasonic welder machine.

School model:

In order to achieve high production efficiency, the distance between the welding head and the plastic parts should be shortened as much as possible, but sufficient space is still required to facilitate the access to the plastic parts.

1 Put the plastic part in the base to adjust the air pressure to about 2Kg, and use the welding head lift switch to align the upper and lower touches.

2 Choose a suitable distance between the welding head and the plastic part to lock the frame fixing handle.

3 Adjust the limit bolts so that the ultrasonic welding head is lowered and there is still about 0.2mm space after pressing the plastic parts. (For plastic parts that require high welding depth, this space is increased accordingly).

4 Adjust welding, holding pressure time, air pressure, and test welding samples.

5 Observe the sample. If you find that the welding is not uniform, you need to fine-tune the balance of the base. The general principle is that the more the welded part is welded, it should be lowered. Put a piece of paper on the opposite position of the base to raise the corresponding position of the base to make the plastic part It is in good agreement with the welding head.