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2024
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09
What is the effect of ultrasonic wave on ultrasonic welding machine?
The intensity is not up to the desired standard. Of course, we must understand that the strength of ultrasonic welding machine operation can never reach the strength of integrated molding, can only be said to be close to the strength of integrated molding, and its welding strength requirements must depend on a number of cooperation, what are these cooperation?
The intensity is not up to the desired standard. Of course, we must understand that the strength of ultrasonic welding machine operation can never reach the strength of integrated molding, can only be said to be close to the strength of integrated molding, and its welding strength requirements must depend on a number of cooperation, what are these cooperation?
Plastic material: the result of mutual welding of ABS and ABS is definitely stronger than that of mutual welding of ABS and PC, because the melting points of the two different materials are not the same, and of course the welding strength cannot be the same, although we discuss whether the two materials of ABS and PC can be welded to each other? Our answer is that it is absolutely possible to weld, but is the strength after welding what we want? Well, not necessarily! On the other hand, what if ABS melts with Nelong, PP and PE? If the ultrasonic HORN instantly emits 150 degrees of heat energy, although the ABS material has been melted, the Nelong, PVC, PP and PE are only softened. We continue to heat up to above 270 degrees. At this time, Nelong, PVC, PP and PE have reached the ultrasonic welding temperature, but ABS material has been analyzed into another molecular structure!
The conclusion can be summarized from the above discussion:
The same melting point of the plastic material welding strength is stronger.
The greater the gap between the melting points of plastic materials, the smaller the welding strength.
The higher the density of the plastic material (hard), the higher the welding strength than the lower the density (high toughness).
The surface of the article is scratched or cracked. In ultrasonic welding operations, it is common for the surface of the product to produce scars, fractures or cracks at the joint.
Because there are two situations in ultrasound operations:
High thermal energy directly contact the surface of plastic products
Vibration conduction.
Therefore, when ultrasonic vibration is used in plastic products, the surface of the products is prone to burns, and plastic columns or holes with thin meat thickness within 1 m/m are also prone to rupture, which is a prerequisite for ultrasonic operation and is inevitable. On the other hand, due to the lack of ultrasonic output energy (extension station and HORN upper mold), it takes a long time to weld when vibration friction energy is converted into heat energy, so as to accumulate heat energy to make up for the lack of output power. This kind of welding method is not the vibration friction heat energy reached in an instant, but needs to accumulate heat energy by welding time, so that the melting point of plastic products reaches the welding effect, which 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 scald, shock or rupture of the product. At this time, it is necessary to consider the power output (number of segments), welding time, dynamic pressure and other coordination factors to overcome this lack of operation.
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