Hole slag cleaning device for PCB (printed circuit board)

Abstract

The invention discloses a hole slag cleaning device for a PCB (printed circuit board), which comprises an air chamber, a transmission device and a dedusting device, wherein the dedusting device comprises a fan, an air outlet pipeline and an air inlet pipeline, the input end of the fan is connected with the air inlet pipeline, the air inlet pipeline is provided with an air filtering device, the output end of the fan is connected with the air outlet pipeline, an air nozzle is arranged at an air outlet of the air outlet pipeline, and the air nozzle is dead against the PCB; the air chamber is surrounded by airtight partition boards and provided with a PCB inlet and a PCB outlet, the air chamber is divided into a front chamber and a rear chamber by the plane where the PCB is located, and the air nozzle is positioned in the front chamber; the transmission device comprises a transmission roller for supporting the lower surface of the PCB and a pressure roller pressed on the upper surface of the PCB; and an air inlet of the air inlet pipeline is arranged in the rear chamber, and a dust recovering device is arranged in the rear chamber. Air pressure in the rear chamber is negative pressurerelative to an external environment, and dust is less prone to outward leakage; furthermore, the negative pressure environment in the rear chamber can enable the air pressure difference between the upper surface and the lower surface of the PCB to be greater, thereby being conductive to improving the airflow blow washing efficiency.

Description

technical field [0001] The invention relates to production equipment in the PCB industry, in particular to a cleaning equipment for cleaning residues in holes after drilling holes on PCB boards. Background technique [0002] PCB (Printed Circuit Board), the Chinese name is printed circuit board, also known as printed circuit board, printed circuit board, is an important electronic component, a support for electronic components, and a provider of electrical connections for electronic components. [0003] In the PCB production process, it needs to be drilled. Some of the drilled holes are used to make via holes for copper plating of various layers of circuits, and some are used to make positioning holes. [0004] After the PCB board 1 is mechanically drilled, some copper wire and PP dust will accumulate in the hole 6 when the PCB board is formed, forming hole slag. The hole slag is mainly copper foil, copper wire, glass fiber and PP powder. Dust 8 (see figure 2 ), which leav...

AI Technical Summary

Problems solved by technology

[0007] Although this equipment uses high-pressure air to blow the holes on the PCB board, it only uses the positive pressure of the air outlet for blowing, which is not efficient, and although a dust collection device is installed, the airflow generated by the device is filtered by the dust collection device. discharge, so that the entire air chamber in the entire equipment is in a positive air pressure environment, which may easily lead to dust leakage, pollute the environment, and is not easy to recycle

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