Coating, coating method and device for welding rod identification

Abstract

The invention discloses paint for welding rod identification and a coating method and device. The paint consists of powder and a binder; the binder is sodium silicate and consists of the following components in percentage by mass: 10-15 percent of marble and 10-15 percent of wollastonite; when the paint is white, the powder also comprises 40-50 percent of titanium dioxide and the balance of iron powder; when the paint is black, the powder also comprises 40-50 percent of graphite and the balance of iron powder; when the paint is yellow, the powder also comprises 30-40 percent of bismuth oxide, 15-25 percent of magnesia and the balance of iron powder. The paint disclosed by the invention has the characteristics of high temperature resistance, good electric conductivity and high binding performance, and can meet the requirement that a welding rod can be still subjected to color code identification after being dried at high temperature. The coating device is simple, and the coating method is convenient, so that the coating process is efficient and rapid.

Description

technical field [0001] The invention relates to a coating, a coating method and a device for identification of welding rods. Background technique [0002] With the development of welding technology, welding rods have also been widely used in shipbuilding, bridges, railway locomotives, marine engineering and construction machinery, and there are more and more varieties. For basic electrodes, in order to prevent pores from welding and reduce the content of diffusible hydrogen, high-temperature baking at 380°C to 450°C is required before use. After the electrode is unpacked, the marking can only be seen on the printed part of the electrode coating. If multiple electrodes are placed in the drying furnace at the same time, it is not easy to identify clearly. Therefore, for different kinds of welding rods, it is particularly necessary to apply coatings of different colors on the ends to quickly identify the kind of welding rods. Ordinary paint, because it cannot withstand high t...

AI Technical Summary

Problems solved by technology

Ordinary paint, because it cannot withstand high temperature, when it is dried at high temperature, the paint will burn off, so it cannot be used for color identification of welding rods

Ordinary ink, although it can withstand high temperature, has insufficient adhesion. Since the end surface of the solder core is relatively smooth, if the adhesion is not high, the ink will fall off after drying with a slight collision, and the purpose of resolution cannot be achieved.

And because the welding core also plays a conductive role in the arc striking process, if the coating is not conductive or can not conduct electricity, it will be more difficult or impossible to start the arc.

Neither paint nor ink can conduct electricity, so it cannot be used as a coating for electrode color identification

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