What are the reasons for the weak welding of the ultrasonic welding machine?
When using an ultrasonic welding machine, the quality of the welding product is often unstable. The welding of the product changes from time to time, which makes the product defective rate very high. The main reasons for this phenomenon are the following points. The most important thing is the machine. The output power is unstable, resulting in the inability to generate stable frictional heat. So how to ensure that the output power of the ultrasonic welding machine can reach a stable level?
1. The actual available output power of the machine = the HorN expansion ratio of the machine output power. According to the formula, it can be known that to maintain a stable ultrasonic power output is to ensure that the machine's output power and the HorN expansion ratio are constant. The technology of the sonic generator is critical, so we recommend choosing a trusted ultrasonic welding machine company with a well-known brand to be more secure.
2. Product design skills, product shape, material, positioning, etc., need to cooperate well with the existing ultrasonic wave pen, which is also an important factor affecting the stability of ultrasonic product quality.
3. During our company's long-term use of the ultrasonic welding machine, we found a problem that was not noticed. When the quality standard was not met within the normal working hours, the voltage and air pressure were not shared by most people when they were off work. In the case of, the quality can meet the standard. It can be seen that the voltage and air pressure also have a very important influence on the stability of the final product quality of the ultrasonic welding machine. Therefore, the stability of the voltage and air pressure needs to be ensured. If it is a large machine welding smaller products, you can try to replace a smaller cylinder, or add an independent air compressor to supply air to the ultrasonic plastic welding machine.
Fourth, the frame is not precise enough
The ultrasonic welding machine seems to be a device with no difficulty except the ultrasonic system. In fact, this is a wrong view. Although the ultrasonic generator is the core part of the ultrasonic welding machine, in addition to the generator part, there is also plastic The problem of the welding machine frame, if a set of frame design is not reasonable enough and the processing is not precise enough, it is likely to directly affect the welding pass rate of your product during use. If the machine design is unreasonable, it will also cause the machine to recline. What affects the welding fastness of the product is that if the processing is not precise and rough, it is impossible to find the best balance position of the mold when changing the mold, so it may also cause the welding of the welded product to fail. The solution is to directly replace a better rack, try to do a good job before purchasing the machine, and understand the relevant information of the equipment.
Five, the ultrasound power is not enough
Insufficient ultrasonic generator power is also a factor that leads to weak welding. Considering that many factories will choose cheap machines when purchasing machines, but one thing that is ignored is the processing and use of other products in the later stage of the machine. The ultrasonic power is not large enough to weld products. If the area exceeds the welding range, the welding will be weak. The solution is to buy a plastic welding machine with high power as much as possible to ensure subsequent use.
Six, the problem of the plastic material itself
There are many plastic materials that can be welded by ultrasonic welding. If other materials are added to the material that can be welded by ultrasonic welding machine, it will also affect the welding fastness. For example, adding glass fiber to PC will affect the whole welding fastness. Solution: Use a single thermoplastic material.