PCB (printed circuit board) self circulation re-washing cylinder

Abstract

The invention discloses a PCB (printed circuit board) self circulation re-washing cylinder, which comprises a cylinder body, a heating device, an ultrasonic wave device, a swinging device, a filtering device and a pump, wherein the cylinder body is used for containing a PCB and medicine liquid taking reaction with ink, the heating device is built in the cylinder body and is used for heating the medicine liquid, the ultrasonic wave device is built in the cylinder body and is used for giving out ultrasonic waves for enabling the PCB to vibrate so that the ink in a PCB hole can be removed, the swinging device is built in the cylinder body and is used for driving the medicine liquid to oscillate and swing in the cylinder body, the filtering device is used for filtering the medicine liquid after the reaction with the ink, the pump is used for pressurizing the medicine liquid for flushing the PCB, and the bottom of the cylinder body is sequentially connected with the filtering device and the pump by pipelines and is then connected into the top of the cylinder body. The PCB self circulation re-washing cylinder has the advantages that the PCB can be circularly cleaned, and the ink in the PCB, particularly in the hole can be effectively removed.

Description

technical field [0001] The invention relates to the field of PCB board manufacturing, in particular to a PCB board self-circulation backwashing tank. Background technique [0002] The solder mask process is a basic process in the manufacture of PCB boards (printed circuit boards). It is mainly to prevent the oxidation of the copper surface by silk-screening a layer of ink on the copper plate of the PCB board. The effect of short circuit. [0003] However, in the process of silk screen printing, due to uneven application of solder resist ink or wrong color of ink, a considerable number of boards will need to be reworked and cleaned. The usual cleaning method is to directly place the bad boards to be reworked in the liquid medicine tank to soak, and then rinse the residual ink with clean water to remove the ink that has been screen printed, and then reprint to save costs. Since the potion used for backwashing and soaking is alkaline sodium hydroxide, the alkaline potion has ...

AI Technical Summary

Problems solved by technology

Since the potion used for backwashing and soaking is alkaline sodium hydroxide, the alkaline potion has higher temperature requirements, especially in winter, the cold water temperature will cause the alkaline potion to be inert, so that the potion cannot fully react and it is difficult to clean. Ink; in addition, because the holes on the PCB board are small, the holes of the mechanical drilling machine are 0.2mm, and the holes of the laser drilling machine are only 0.075mm, so the traditional method cannot guarantee that the ink blocked in the hole is completely removed, and the PCB after rework Board quality hidden danger is bigger

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