Hydrocarbon cleaning method and device for preventing copper oxidization

Abstract

The invention relates to a hydrocarbon cleaning method and device for preventing copper oxidization. According to the hydrocarbon cleaning method for preventing copper oxidization, a cleaning way that a three-layer square basket is compatible with a three-layer rotary drum is adopted, and degassed hydrocarbon ultrasonic cleaning A, degassed hydrocarbon ultrasonic cleaning B, vacuum hydrocarbon ultrasonic cleaning, copper tarnish prevention treatment, vacuum vapor treatment and vacuum drying are sequentially conducted on a copper-containing workpiece. The hydrocarbon cleaning device comprises a degassed ultrasonic cleaning tank A, a degassed ultrasonic cleaning tank B, a vacuum ultrasonic cleaning tank, a protective agent tank, a vacuum vapor cleaning and drying tank, the three-layer square basket and the three-layer rotary drum. By adoption of the hydrocarbon cleaning method for preventing copper oxidization, blanking oil stains on the surface of a part can be effectively removed, and yellow points/yellow spots are avoided after cleaning; and meanwhile, the requirement for cleaning and protecting flat sheet type parts and angled parts can be met, and the one-time checked qualification rate of the cleaned parts is 97%-98%.

Description

technical field [0001] The invention relates to an industrial cleaning method for copper-containing workpieces, in particular to a method and equipment for preventing copper oxidation and hydrocarbon cleaning. Background technique [0002] The 141B organic solvent cleaning process of the touch cover cleaning machine is used for copper and copper alloy parts. The specific process is: loading → 141B rough cleaning → 141B cleaning → 141B fine cleaning → suction drying → unloading. Among them, 141B organic solvent is HCFC-141B cleaning agent. [0003] There are following problems in above technology: [0004] ①Environmental issues: [0005] The "Agreement on the Phasing Out of ODS in China's Cleaning Industry" stipulates that the use of ODS cleaning agents cannot be increased from 2013, and its use will be banned by 2030. The HCFC-141B used in the touch cover cleaning machine is a transitional cleaning agent, which can damage the atmospheric ozone layer to a certain extent, a...

AI Technical Summary

Problems solved by technology

[0007] The copper and copper alloy parts cleaned by the touch cover cleaning machine only remove the oil and foreign matter on the surface of the parts. Since there is no anti-copper discoloration treatment, the parts are prone to oxidative discoloration during storage, especially during the rainy season or Parts are more prone to oxidative discoloration when the ambient humidity is high

[0008] ③The original 141B cleaning process cannot meet the quality requirements of various parts:

[0009] The original 141B organic solvent cleaning process cannot meet the cleaning of tin-plated parts such as coil soldering pieces, the solderability requirements of mass production turnover and parts after inventory, and cannot meet the cleaning quality requirements of various parts

[0010] Generally speaking, the 141B organic cleaning agent cleaning process of the touch cover cleaning machine has problems such as not meeting the future environmental protection requirements, and failing to meet the cleaning protection performance and solderability requirements of various parts and components.

[0011] Chinese invention patent application CN105642608A discloses a cleaning process for copper parts, including degassing hydrocarbon ultrasonic cleaning, vacuum hydrocarbon ultrasonic cleaning, vacuum bath washing and drying treatment. After cleaning by this process, parts are easily oxidized again and affect subsequent welding. And the cleaning effect on non-flat workpieces is poor, and it cannot meet the cleaning quality requirements of various parts