When ultrasonic welding plastic products, uneven welding, burns, fractures, etc. often occur.

When ultrasonic welding heats up instantaneously, when the high heat energy of the plastic product directly contacts the surface of the plastic product, the surface of the product is prone to burns, and the thinner plastic posts or holes within 1mm are also prone to cracking.

When the ultrasonic output energy is converted into heat energy, it takes a long time for welding to accumulate heat energy to make up for the lack of output power. This kind of welding method does not achieve vibration and frictional heat energy instantaneously, but needs to accumulate heat energy by welding time, so that the plastic product can achieve a welding effect. This will cause the heat energy to stay on the surface of the product for too long, and the accumulated temperature and pressure will also cause The product is burned, shattered or broken.
We can overcome it in the following ways:
1. Reduce stress;
2. Reduce the delay time (early vibrate);
3. Reduce welding time;
4. Reference media coverage;
5. Surface hardening treatment of mold jig;
6. Reduce the number of machine stages or reduce the enlargement ratio of the upper die;
7. Add R angle to the right angle of the product that is easy to break.