PCB Ultrasonic Cleaning Machine - Jiayuanda Technology

PCB circuit board cleaning, mainly with ultrasonic cleaning machine for cleaning, but there are components on the circuit board, such as crystal oscillator, metal shell, after cleaning, it is difficult to dry the moisture inside the components. Using ultrasonic cleaning principle: flux residue cleaning, mainly through the dissolution of the completion. Whether rosin or organic acids and their tin or lead salts are soluble in the cleaner, the removal of residues is accomplished by transferring the circuit board from the cleaner to the cleaner

The safer method is to use ultrasonic cleaning

Residue classification, the residue of printed circuit board after welding can be roughly divided into three categories:

1, particulate pollutants - dust, lint and solder ball. Solder ball is a welding defect. If the vibration of the equipment causes a large number of small solder ball to gather in one part, it may cause an electrical short circuit. Solder balls can be removed by cleaning.

2. Non-polar contaminants -- rosin resin, paraffin wax and anti-oxidant oils used in wave soldering, as well as cosmetics or hand sanitizers left behind by operators.

3, polar dirt - halides, acids and salts. Circuit board contamination hazards: particulate pollutants -- electrical short circuit polarity contamination -- dielectric breakdown, leakage, component/circuit corrosion non-polar contamination affects the appearance, white powder point, adhesion dust, electrical contact bad PCB, circuit board,

The cleaning method of the circuit board is as follows: (1) Common cleaning mainly uses a single cleaning tank, and the PCB to be cleaned is soaked in the cleaning agent liquid. The temperature of the cleaning agent in the ultrasonic cleaning machine is generally set to 35 degree -85 degree , and the cleaning time is 3-5 minutes.