PCB News - Share the working principle of PCBA cleaning machine

Share the working principle of PCBA cleaning machine
To understand the working principle of the PCBA cleaning machine, let us first understand that the PCBA boardneeds to use solder paste and flux for soldering during the production process, and the flux will produce residues, which will contain organic acids. And the residue of decomposable electric ions, among which organic acid can cause corrosion of PCBA board. The residue of the ion can cause a short circuit of the PCBA board during the power-on process, and cause the PCBA board to be unusable. Therefore, the PCBA board must be cleaned before the formal use, and the solder joints of the secret hemp, it is difficult to clean it by manual methods. It is very easy to do this with an ultrasonic cleaning machine, and the cleaning is very clean.

The PCBA cleaning machine uses an ultrasonic generator to generate a high-frequency current, which is converted into a mechanical wave of the same frequency through the piezoelectric effect of the ultrasonic transducer, and is densely transmitted into the cleaning liquid along the axis of the transducer in the form of ultrasonic waves, and Tens of thousands of tiny bubbles are generated in the cleaning solution. These bubble nuclei form and grow in the negative pressure zone where the ultrasonic wave propagates in the longitudinal direction, and quickly burst in the positive pressure zone. The process of the formation, growth and rapid collapse of such tiny bubbles is called the "cavitation effect". When cavitation occurs, the tiny bubbles form an instantaneous high pressure of more than 1000 atmospheres from the moment of generation, growth and rapid rupture. The continuous instantaneous high pressure is like a series of small bombs that constantly bombard the surface of the cleaning object, causing the surface of the object and the gap. And the attachment and dirt in the blind hole quickly peel off. The role of this cavitation erosion effect is the basic principle of ultrasonic cleaning. With a suitable cleaning agent, the effect of rapid cleaning can be achieved.

The ultrasonic generator is used to generate a high-frequency current, which is converted into a mechanical wave of the same frequency through the piezoelectric effect of the ultrasonic transducer, and is densely transmitted into the cleaning liquid along the axis of the transducer in the form of ultrasonic waves, and is generated in the cleaning liquid Tens of thousands of tiny bubbles, these bubble nuclei form and grow in the negative pressure zone where the ultrasonic wave propagates in the longitudinal direction, and quickly burst in the positive pressure zone. The process of the formation, growth and rapid collapse of such tiny bubbles is called the "cavitation effect". When cavitation occurs, the tiny bubbles form an instantaneous high pressure of more than 1000 atmospheres from the moment of generation, growth and rapid rupture. The continuous instantaneous high pressure is like a series of small bombs. The washing machine is a fully automatic process. PLC control, 6 sections of feeding section, ultrasonic cleaning chamber, medium pressure spray cleaning chamber, medium pressure spray rinsing chamber, water suction chamber, air knife cutting water chamber, discharge section and A continuous working cleaning device composed of Teflon mesh belt flat conveying system.

The customer's feeding device feeds the workpiece onto the mesh belt in the feeding section, and the mesh belt plane conveying system sends the workpiece to each station in turn to clean, rinse, and dehydrate the workpiece. The cleaning, rinsing, and dehydration of the whole device is a fully enclosed structure, with a removable observation window, a removable movable inspection door and a good exhaust system. Pay attention to product innovation in terms of energy saving and emission reduction. PCB factoriesmust learn to attach importance to Internet technology and realize the practical application of automated monitoring and intelligent management in production through the integration of overall industry knowledge.