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How to solve the problem of spill cape or fur edge after ultrasonic welding?

Views:91     Author:Site Editor     Publish Time: 2019-08-09      Origin:Site

How to solve the problem of spill cape or fur edge after ultrasonic welding?




The causes of product spills or edges after ultrasonic welding are as follows:

1) The ultrasonic power is too strong.

2. The ultrasonic welding time is too long.

3. The air pressure (dynamic) is too large.

4. The pressure under the upper die (static) is too large.

5. The energy expansion ratio of the upper mode (horn) is too large.

6. Plastic product fuse wire is too outside or too high or too thick.


     The six factors mentioned above are the causes of overflow edge after ultrasonic welding operation. However, the most critical one is the opening of the sixth ultrasonic fuse line. Generally, in ultrasonic welding operation, the air pressure is in the range of 2-4 kg. According to the empirical value, the best supersonic waveguide fuse line is in the bottom of 0.4-0.6 m/times. If the height is 0.3-0.4m/m, such as Delta, the sharp angle is about 60 degrees, which will lead to the increase of ultrasonic welding time, pressure, power of machine or upper horn, thus forming the causes of spills and edges mentioned above 1-6 items.


Solutions:

1. Reduce pressure and time of ultrasonic welding (reduce strength standard).

2. Reduce the number of power segments or low-power machines.

3. Reduce the amplification ratio of the ultrasonic mould.

4. Fine-tuning positioning and fixing with ultrasonic machine.

5. Modify the ultrasonic fuse guide.


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