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Introduction of ultrasonic principle

Release time: 2021-02-23

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Introduction of ultrasonic principle

The mask machine is a new type of equipment developed for the production of masks for customers; it uses 1~4 layers of PP spunbond non-woven fabric, activated carbon and filtering materials as the feeding material (according to the filtering performance of the raw materials used, it can reach KN95, FFP2 Different standards). 


The mask is made by ultrasonic technology, the mask is clearly embossed, the welding is fast, and the speed is fast, which meets the requirements of product performance, and the design of the mask strictly meets the European and American testing standards, all of which are fully automated to control the production of masks. Important, high-tech assistance should not be underestimated, every detail must be professional and rigorous, and the quality of the mask machine parts is excellent.

 

Production equipment


1. Overview of Ultrasonic Principle

The principle of multi-layer fusion of non-woven chemical fiber fabrics is to use high-frequency friction between the contact surfaces to rapidly generate heat between molecules. Under a certain pressure, it can weld multi-woven fabrics or fabrics or PVC films. The frequency usually used for non-woven fabric welding processing is 20KHz and 15KHz. Ultrasonic energy penetrates the material to fuse it together. 


Generally, it is necessary to make tooth-like, net-like, and strip-like patterns on the welding head, form patterns on the surface of the fused product, and fuse multiple layers of fabric. Disposable flat masks and N95 masks are manufactured in this way, and the mask ear straps are also spot welded by ultrasonic.

 

2. System combination

Ultrasonic welding system-generally used in automatic equipment, with automatic equipment to complete continuous welding or reciprocating welding. Ultrasonic welding systems generally include: ultrasonic generators, ultrasonic transducers, ultrasonic welding molds (welding heads), and related accessories, such as flanges for fixed support of the transducer, connecting cables, etc.

 

Production equipment


Ultrasonic generator, also known as ultrasonic power supply, ultrasonic electric box, is a kind of electronic circuit device that can provide high-frequency current, and it can generate ultrasonic vibration energy with ultrasonic transducer. The principle of the ultrasonic transducer is to use the inverse effect of piezoelectric ceramics and add appropriate high-frequency current to the transducer to produce mechanical vibrations of the same frequency. 


Ultrasonic generator, ultrasonic transducer, and ultrasonic welding head constitute a complete set of ultrasonic vibration device. The three components of the ultrasonic vibration device must reach resonance to be able to work normally. Improper installation and connection, improper resonance frequency, and improper adjustment will cause system abnormalities and damage the system in serious cases.


Production equipment


Zhongshan Saifute has three clean and tidy workshops and advanced equipment with a team of advanced professional management and technical staffs. The company's own brand "Laianzhi" is a famous brand in the industrial respirator industry at home and abroad. The masks manufactured by the company are made of high-quality filter materials of European. 

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