Why can't the ultrasonic welding machine weld firm

1. The air pressure in the workshop is unstable
After sales, many ultrasonic welding machine manufacturers caused improper welding due to the unstable air pressure in the customer's workshop. The instability of gas pressure is also an important factor leading to the failure of ultrasonic welding. first. Before leaving the factory, the new machine should undergo strict internal test to ensure that there is no problem before normal delivery. However, when the customer uses this machine. Various welding problems will occur because before purchasing the machine, samples are usually taken to test the machine to ensure that there are no problems in the machine proofing test before shipment. So, when we contact customers, why do we have the problem of poor welding? The ultrasonic generator has been tested and debugged repeatedly, and no problems have been found. So what is the problem?
After a long time of observation, it is found that the unstable air pressure in the customer's workshop is the cause of the instability of the air pressure. Only when the machine is used normally at the end of work can improper welding not occur. During normal working hours, the problem reappears. Therefore, we believe that the unstable air pressure affects the normal welding of the ultrasonic welding machine. Because many equipment that need to use natural gas will work at the same time, the pressure will decrease when the gas is too far away. The solution is to replace the larger cylinder with a smaller one, or add an independent air compressor to provide air for the ultrasonic plastic welding machine.
2. The frame fabrication is not accurate enough
Ultrasonic welding machine seems to be a kind of equipment without any difficulty except ultrasonic system. In fact, this is a wrong view. Although the ultrasonic generator is the core component of the ultrasonic welding machine, the frame of the plastic welding machine also has problems in addition to the ultrasonic generator components. If the design of the frame is unreasonable and the processing is not accurate enough, it is very likely to be in use. It directly affects the welding pass rate of your product. If the machine design is unreasonable, the welding fastness of the product will also be affected. In addition, if the processing is not accurate and rough, the balance position of the mold cannot be found when replacing the mold, which may also lead to the inability of welding the welded products. The solution is to directly replace a better rack, try to do a good job in the procurement before purchasing the machine, and understand the relevant information of the equipment.
3. Insufficient ultrasonic power
Inadequate power of ultrasonic generator (i.e. transducer) is also a factor leading to poor welding. Considering that many customers will choose to purchase cheaper machines, but ignore the transducer! When using ultrasonic welding products in the later stage, if the ultrasonic power is not large enough, the range of welding products in the welding field will also lead to poor welding! Our solution is to purchase high-power plastic welding machines as much as possible to ensure the subsequent use.
4. Problems of plastic materials
There are many plastic materials that can be welded by ultrasonic. If other materials are added to the material of ultrasonic welding machine, the welding fastness will also be affected. For example, adding glass fiber into PC will affect the whole welding fastness!