Manufacturing method of screen printing steel knife and steel screen

Abstract

The invention discloses a manufacturing method of a screen printing steel knife and a steel screen. The manufacturing method comprises following steps: step 1, a steel knife to be treated or a steel screen processed via laser etching is successively subjected to degreasing, washing, activating, and electrolytic polishing; wherein in the electrolytic polishing process, the steel knife or the steel screen is taken as an anode, a conductive material with electrolyte corrosion resistance is taken as a cathode, and the anode and the cathode are immersed in an electrolyte, and are charged with electricity continuously; step 2, the steel knife or the steel screen processed via electrolytic polishing is successively subjected to washing, film removing, anode electrolysis, neutralizing, nickel preplating, and then nickel plating, wherein in the nickel plating process, nickel is taken as an anode, the steel knife or the steel screen is taken as a cathode, and the anode and the cathode are immersed in an electrolyte containing nickel ions, and are charged with electricity continuously; and step 3, the steel knife or the steel screen processed via nickel plating is coated with a polytetrafluoroethylene layer via plating, and then is subjected to washing and drying successively. The steel knife and the steel screen obtained via the manufacturing method are flat and smooth, and possess wear resistance; and yield of accepted goods and efficiency of printing engineering are increased.

Description

technical field [0001] The invention relates to a method for making a screen printing steel knife and a steel mesh, in particular to a method for making a steel knife and a steel mesh for an SMT printing machine, and belongs to the field of solder paste printing. Background technique [0002] With the rapid development of high technology, electronic products have entered the era of miniaturization and high functionality. High precision, and surface mount technology (SMT, Surface Mounted Technology) is becoming mainstream. [0003] Printing engineering is the basis and root of SMT engineering. As one of the factors of printing engineering, steel knife and steel mesh also have a great influence on SMT, so the requirements for the design and production of steel knife and steel mesh are getting higher and higher. Whether the printing process is good or not depends on whether the blade of the steel knife and the surface of the stencil are smooth and wear-resistant. Therefore, th...

AI Technical Summary

Problems solved by technology

[0004] The front end of the existing printing project is to cut the pre-cut steel sheet, and engrave the preset electronic circuit with laser (called laser engraving or laser engraving in the industry) to form a screen printing stencil; and the screen printing steel knife is also used in advance Cut it according to the required size; then manually grind the two to make it smooth and smooth for printing; because it is manually ground, the blade of the screen printing steel knife and the surface of the screen printing stencil, the screen The inner surface of the hole is uneven, rough, and has radium-engraved burrs. Therefore, during the printing process, the blade of the steel knife and the surface of the stencil are easy to wear, and the solder paste is not easy to roll and accumulate in the mesh of the stencil. In the pits on the inner surface of the mesh, it needs to be cleaned before the next use, which wastes manpower and time and reduces work efficiency; in addition, because the solder paste is attached to the rough mesh, it is not easy to clean, so each cleaning is not thorough , During the long-term use of the stencil, the solder paste accumulates more and more, which reduces the effective printing area, thus affecting the quality of printing and product quality

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