Nickel plating non-grinding process for production of printing roller

Abstract

The invention relates to a nickel plating non-grinding process for production of a printing roller. The process specifically includes the following steps that (1) the printing roller to be plated with nickel is grinded, and the surface roughness of the printing roller is controlled to be smaller than or equal to Rz 0.3; (2) a nickel salt solution is prepared, half of the grinded printing roller is soaked in the nickel salt solution, a metal nickel block serves as a positive pole, the printing roller soaked in the nickel salt solution serves as a negative pole, the nickel salt solution is purified firstly, then nickel plating is conducted, and the nickel plating time is controlled to range from 250 seconds to 280 seconds; and (3) the printing roller with the surface plated with a nickel layer is placed in a nickel grinding groove, rotated, washed for 30-45 seconds with high-pressure water and then transferred to a copper tank rapidly, and then later copper-plating operations can be conducted. Compared with the prior art, the nickel plating non-grinding process has the advantages that the steps are simple, conditions are easy to control, washing is achieved through high-pressure water, grinding is avoided, and automatic control is realized; besides, the economic cost is low, copper-plating points can be effectively reduced, the quality stability of the obtained nickel-plated printing roller is good, and the process has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of plate roller processing, and relates to a nickel-plating free-grinding process for printing plate roller production. Background technique [0002] During the production and processing of printing plate rollers, a nickel plating process is required, and the main purpose of nickel plating is to enhance the bonding force of the copper plating layer. After nickel plating, the process of nickel polishing must be carried out before copper plating. There are two main reasons: 1) Nickel plating is relatively thick, and it takes about 400-450 seconds to plate (if nickel plating is too thin, sandpaper polishing is very difficult). It is easy to polish off), which will cause some nickel tumors and nickel slag on the surface of the nickel layer to stick to the surface of the nickel layer during the electroplating process. If it is not polished, it will cause quality problems such as pinholes and burrs after copper pl...

AI Technical Summary

Problems solved by technology

After nickel plating, the process of nickel polishing must be carried out before copper plating. There are two main reasons: 1) Nickel plating is relatively thick, and it takes about 400-450 seconds to plate (if nickel plating is too thin, sandpaper polishing is very difficult). It is easy to polish off), which will cause some nickel tumors and nickel slag on the surface of the nickel layer to stick to the surface of the nickel layer during the electroplating process. If it is not polished, it will cause quality problems such as pinholes and burrs after copper plating; 2) To prevent the passivation of the nickel layer, that is, to prevent the passivation of the nickel layer, grinding must be carried out as soon as possible

[0003] However, the above-mentioned nickel-plating grinding process can meet the normal production requirements at present, but there are also the following technical defects: 1) nickel grinding technicians need to use sandpaper to polish the nickel layer, and the skill of the technicians directly determines the quality of the plate roll. The effect of copper plating, for example, if the grinding force is too large, it will cause burrs on the copper plating, and if the walking speed is too fast, the grinding will be uneven, and if it is too slow, it will cause the oxidation of the nickel layer and affect the bonding force of the copper plating; 2) due to the After the roll reaches the grinding tank, technicians need to manually polish the plate roll at the first time, which will undoubtedly increase the labor intensity of the staff, low production efficiency and high economic cost