Nickel bath water drainage system structure for PCB (printed circuit board) electroless nickel immersion gold line

Abstract

The invention discloses a nickel bath water drainage system structure for a PCB (printed circuit board) electroless nickel immersion gold line. A circulation pipeline starts from a liquid outlet of a secondary slot and extends into a primary slot; a secondary slot liquid-discharge tube is a hose; one end of the secondary slot liquid-discharge tube is detachably connected to the circulation pipeline, and the other end of the secondary slot liquid-discharge tube is connected to a primary slot liquid-discharge tube; the tail end of the primary slot liquid-discharge tube is divided into a first branch tube and a second branch tube; the first branch tube is connected to a high-concentration wastewater discharge tube; and the second branch tube is connected to a washing water discharge tube. In the nickel bath water drainage system structure for the PCB electroless nickel immersion gold line, the primary slot liquid-discharge of the primary slot and the circulation pipeline are separated, and are independently connected to the high-concentration wastewater discharge tube and the washing water discharge tube; the secondary slot liquid-discharge tube is the hose and can be manually dismounted, so that the circulation pipeline is completely isolated from the primary slot liquid-discharge tube and the secondary slot liquid-discharge tube, thereby effectively avoiding bath solution and product scrapping due to the fact that the high-concentration waste liquid enters the nickel bath primary slot, reducing generation of waste liquid and maintaining the environment better.

Description

technical field [0001] The invention belongs to the field of printed circuit board manufacturing, and in particular relates to a nickel groove drainage system structure for electroplating gold wires. Background technique [0002] The PCB gold wire process can also be called immersion gold, or chemical immersion nickel gold. When the PCB product is melted into gold, it needs to be carried out in a nickel tank. The existing nickel tank drainage system is as follows: the nickel tank main tank drain pipe, auxiliary tank drain pipe, high-concentration waste liquid drain pipe and washing waste liquid pipe are all connected together. Such a nickel tank drainage system has the following defects: once the high-concentration waste liquid discharge valve is damaged, the circulation pump will pump the nitric acid or other debris in the high-concentration waste liquid pipe through the circulation pipe due to its strong suction. into the nitric acid tank, resulting in the scrapping of n...

AI Technical Summary

Problems solved by technology

Such a nickel tank drainage system has the following defects: once the high-concentration waste liquid discharge valve is damaged, the circulation pump will pump the nitric acid or other debris in the high-concentration waste liquid pipe through the circulation pipe due to its strong suction. into the nitric acid tank, resulting in the scrapping of nickel tank mother liquor and products, increasing the cost of sewage treatment

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