Copper bar electrotinning bath

Abstract

The invention relates to the field of electroplating, and particularly relates to a copper bar electrotinning bath which comprises an inner bath and an outer bath. A cavity is formed between the outer surface of the inner bath and the inner surface of the outer bath, air pumps are installed on the bath walls on the two sides of the outer bath and penetrate through the bath walls of the outer bath, and the input ends, penetrating through the bath walls, of the air pumps are connected with air suction heads; and a copper bar hanging tool is arranged on the side, away from each air pump, of the air suction head and connected with a hydraulic cylinder through an iron chain, and the hydraulic cylinder is fixed to the rack. Through cooperation of the inner bath and the outer bath and use of the heat exchanger and the filter layer, the electroplating liquid is cooled while the inner bath continuously shakes, a gas is filtered in the gas utilization process, the distribution uniformity of tin particles in the electroplating liquid is improved, then the electroplating effect is improved, and emission of the harmful gas is reduced.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to an electroplating tin bath for copper bars. Background technique [0002] Electroplating technology is widely used in production and life. Electroplating is the process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis, so as to prevent metal oxidation, improve wear resistance, conductivity, Reflective, anti-corrosion and beauty-enhancing effects. Copper bars are a high-current conductive product, and they also need to be electroplated before use. [0003] At present, the traditional tinning method of copper bars is the rack plating method. The rack plating method is to use a rack to place the copper bars in the tin plating bath for tin plating. Because the liquid in the tin plating bath does not flow, it is used for a period of time. After that, it will lead to uneven distribution of the electroplating solution,...

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Problems solved by technology

[0003] At present, the traditional tinning method of copper bars is the rack plating method. The rack plating method is to place the copper bars in the tin plating bath with a rack for tin plating. Because the liquid in the tin plating bath does not flow, it is used for a period of time. After that, it will lead to uneven distribution of the electroplating solution, which will affect the electroplating effect; and the conductive point is fixed, so the temperature of the contact point will gradually increase with the extension of the electroplating time, so that the electroplating efficiency will gradually decrease; all tanks in this process are open state, the generated acid and alkali mist cannot be sealed and collected, seriously affecting the environment

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