Face Mask Welding Machine

The ultrasonic face mask welding machine uses high-frequency vibration waves to be transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects are rubbed against each other to form a fusion between the molecular layers.

Some indentations can be seen everywhere on the mask, such as the edges, ear straps, and exhalation valve are all ultrasonically welded. As shown in the figure above, in the production process of masks, we can intuitively understand the welding of an all-plastic nose bridge, welding after hemming, breathing valve welding, multi-layer seam, and ear band welding. These are actually made by ultrasonic welding Finished.

When the ultrasonic wave acts on the thermoplastic plastic contact surface, it will generate tens of thousands of high-frequency vibrations per second. This kind of high-frequency vibration with a certain amplitude will transmit the ultrasonic energy to the welding area through the upper weldment. Because the welding area is two, The acoustic resistance at the welding interface is large so that the local high temperature will be generatAlsotion; due to the poor thermal conductivity of the plastic, it cannot be distributed in time for a while, and it gathers in the welding area, causing the contact surface of the two plastics to melt rap. Afterfter a certain pressure is applied, they are fused into one.

How ultrasonic welding machine works

When the ultrasonic stops, let the pressure continue for a few seconds to solidify and shape, thus forming a strong molecular chain, achieving the purpose of welding, and the welding strength can be close to the strength of the raw material. According to different welding methods, ultrasonic welding can be divided into embedded welding, riveting welding, spot welding, and forming.

Ultrasonic welding uses 15 kHz-50kHz high-frequency vibration to melt and weld plastics.  The upper and lower parts are compressed. The ultrasonic vibration is transmitted to the joints of the upper and lower parts, causing alternating stress at the welding ribs, heating and melting the plastic through the friction between the molecules. The ultrasound stops, and the upper and lower parts continue to be pressed tightly until they are bonded together.

Composition of ultrasonic face mask welding machine

An ultrasonic generator (power supply)

The ultrasonic generator converts the 110VAC or 220VAC electrical supply current into a high frequency, high voltage electrical signal.

Ultrasonic power is divided into two kinds of simulation and numerical control; HCSONIC adopts numerical control power as more advantages.

  • Track the primary resonance
    During ultrasound operation, as the temperature, power, and load change, the frequency of resonance may shift, and the ultrasound generator can automatically follow this frequency shift.
  • Lock onto the primary resonance
    All ultrasonic systems have a primary resonance. Also, there will be secondary (spurious) resonances. When the power supply starts, it must lock onto the immediate resonance and ignore the secondary resonances.
  • Auto-adjust amplitude
    Most applications can be best controlled by controlling the output amplitude rather than the power. Amplitude should be regarded as the independent (input controlled) variable, and power should generally be considered the dependent (output resultant) variable.

An ultrasonic converter (transducer)

The ultrasonic transducer uses the high-frequency electrical signal from the ultrasonic generator and converts it into linear mechanical motion. This conversion is performed by using piezoelectric ceramic disks, which expand when a voltage is applied. The transducer used for ultrasonic rubber cutting is specially designed, and air can be introduced and discharged for cooling.

 

An ultrasonic booster

The ultrasonic booster is a tuned component that mechanically adjusts the amount of linear vibratory movement from the converter to the required level for the specific application to produce optimal welding performance. The booster also provides a safe, non-vibrating location to clamp onto the welding tools.

An ultrasonic welding tool (horn/sonotrode)

The ultrasonic welding horn is a custom-made tool engineered to vibrate at a specific frequency. These tools are painstakingly designed using computer modeling technology for optimum performance and longevity. Ultrasonic tools must be tuned to match the frequency of the system. This tuning procedure requires consideration of the horn’s mass, length, and geometry. HCSONIC provides various configurations; each configuration is designed for specific applications, strictly to ensure long-term good performance.

Ultrasonic face mask welding machine (20K) power: 2000W

Ultrasonic face mask welding machine (15K) power: 2600W

Ultrasonic face mask ear loops welding machine (35K)

Ultrasonic transducer customization

Simultaneously, we can also customize various ultrasonic transducers according to customer needs to meet the needs of production. For more information on the customization of ultrasonic transducers, please see.

Hangzhou Jiazhen Ultrasonic Technology focuses on developing, designing, and customizing power ultrasonic transducers and related materials. The company has experienced ultrasonic transducer design engineers and many years of experience in new product development and design and has passed the depth of research Institut. Ions The cooperation has formed a systematic and standardized technical system to ensure the quality of ultrasonic transducers/ultrasound probes in the development, testing, performance calibration and stability, and stability.

 

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