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What's the principle of Ultrasonic plastic welding?
When ultrasonic act on the thermoplastic plastic contact surface, high-frequency vibrations of tens of thousands of times per second. This high-frequency vibration reaches a certain amplitude, and the ultrasonic energy is transmitted to the weld zone through the upper weldment, because the weld zone have a large acoustic resistance, so local high temperatures are generated. Moreover, due to the poor thermal conductivity of the plastic, it can not be dissipated in time and gather in the weld zone, so that the contact faces of the two plastics melt rapidly, and after a certain pressure, they are integrated into one. When the ultrasonic wave stops, let the pressure last for a few seconds to solidify it, thus forming a strong molecular chain for welding purposes, the welding strength can be close to the strength of the raw material.
The quality of ultrasonic plastic welding depends on the amplitude of the transducer welding head, the applied pressure and the welding time. The welding time and the welding head pressure can be adjusted. The amplitude is determined by the transducer and the horn. These three quantities have a suitable value for each other. When the energy exceeds the appropriate value, the melting amount of the plastic is large, and the welding material is easily deformed; if the energy is small, the welding is difficult, and the applied pressure cannot be increased. This optimum pressure is the product of the length of the side of the welded portion and the optimum pressure per 1 mm of the edge.
Ultrasonic welding is a high-tech technology for welding thermoplastic technology. Various thermoplastic rubber parts can be processed by ultrasonic welding without adding solvent, adhesive or other auxiliary products. The advantage is to increase productivity and reduce cost. improve product quality.
Ultrasonic plastic welding principle: The generator generates 20KHZ, (or 15KHZ) high-voltage, high-frequency signal, through the conversion system, converts the signal into high-frequency mechanical vibration, which is applied to the workpiece of plastic products, through the working surface and the intrinsic intermolecular The friction causes the temperature to be transmitted to the interface to rise. When the temperature reaches the melting point of the workpiece itself, the workpiece welding port is rapidly melted, and then filled in the gap between the interfaces. When the vibration stops, the workpiece is simultaneously cooled and fixed under a certain pressure. , to achieve the perfect welding.
Ultrasonic spot welding machine can be used for thermoplastics welding by converting 50/60 Hz current to 15, 20, 30, or 40 kHz power through the ultrasonic generator. The converted high-frequency electrical energy is again converted into mechanical motion of the same frequency through the ultrasonic transducer, and the mechanical motion is then transmitted to the welding head through a set of amplitude modulator devices(booster) that can change the amplitude. The vibration energy received by the welding head is transferred to the joint of the workpiece to be welded. In this area, the vibration energy is converted into heat energy by means of friction to melt the plastic. After the vibration stops, the transient pressure maintained on the workpiece causes the two weldments to solidified into one body in the form of molecular linkage. Generally, the welding time is less than 1 second, and the welding strength obtained can be comparable to the body.
Features:
* Good quality famous brand components are used to realize the strong power and stable performance.
* Compact design with small size, saving space.
* Low noise, low power consumption, environment friendly
* High efficiency with strong welding results.
| Apparel | Clothing fabric, underwear spot welding, etc. |
| Label | Logo, woven labels, marks welding or spot welding, etc. |
| Shoe material | TPU vamp positioning spot welding, smoothen shoe head wrinkles, etc. |
| Poultry | Chicken manure belt, egg conveyor belt welding, etc. |
| Automobile | Automotive trim wrapping, trim riveting, steering wheel dustproof sleeve welding, etc. |
| Electronic | Plastic parts, rubber column riveting, soundbox covering cloth welding, etc. |
| Packaging | PVC spot welding, plastic box sealing welding, etc. |
| Non-woven | Face mask, non-woven bag welding, etc. |
| Ribbon | Ribbon, elastic belt welding |
| Filter net or bag | Velcro welding, film welding, etc. |
| Item | Parameter | Advantage: | Application |
| 28Khz ultrasonic hand welder Straight type |
▪ 28Khz 800W ▪ Digital generator ▪ Horn customized ▪ Aluminum alloy&Steel & Titanium alloy ▪ Power Supply: 220v 50/60HZ |
1. light generator ,light hand welder.The generator 120*120*380, whole weight5KG, with generator 4kg, and the 28Khz hand welder 1kg, 35Khz hand welder 0.8kg. Suit for hand operate. 2. Special alloy metal housing, the housing of the hand-welder is light but firm, not easy to be deformed, longer it'd using life. 3. Digital generator, it can tracking the frequency itself, easy for operate. Output /welding time adjustable, suit for both hand operate and machine operate. |
PP PVC Fabric woven PE ABS PS Nylon PU PET All Thermoplastic material, the thickness 8mm in max. Straight type suit for both hand /machine operate. Gun type suit for hand operate. |
| 28Khz ultrasonic hand welder Gun type |
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| 35Khz ultrasonic hand welder Straight type |
▪ 35Khz 500W ▪ Digital generator ▪ Horn customized ▪ Aluminum alloy&Steel & Titanium alloy ▪ Power Supply: 220v 50/60HZ |
PP PVC Fabric woven PE ABS PS Nylon PU PET All Thermoplastic material, the thickness 5mm in max. Straight type suit for both hand /machine operate. Gun type suit for hand operate. |
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| 35Khz ultrasonic hand welder Gun type |
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| For better application , it is better share all the material information with me, the material, thickness, operate way, speed requirements before order . We also supply 20Khz 40Khz ultrasonic hand-weld welder. |
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