Spraying Technology of High Manganese Steel Frog Casting Cavity Paint

Abstract

The invention discloses a coating spraying process for a high manganese steel frog casting mold cavity. The coating spraying process comprises the following steps that a, spraying is conducted, specifically, coating is adopted to uniformly spray the whole mold cavity; b, brushing is conducted, specifically, the 50 mm section from a toe end ramp to a point rail of a rim slot is brushed uniformly by hand; and c, surface treatment is conducted, specifically, the rib slot is slightly brushed through a brush dipped in alcohol. The coating adopted in the process is alcohol-based magnesite quick drying coating. The process has the beneficial effects that firstly, the casting detects of double skins, cold laps and the like leading to generating of rejects in high manganese steel frog castings can be eradicated, 15 pieces of the rejects can be decreased each month, and eighty thousand yuan of economic value is created; secondly, defective products of the castings can be controlled, the sand bonding defect of an upper jaw part and a lower jaw part of a fishtail of the frog and a process pressing platform part can be well controlled through the process, and the surface quality of the casting is improved greatly; and thirdly, the labor intensity of workers is reduced greatly, the overall surface quality of the castings produced by the spraying process is quite good, and a large amount of manual polishing is not needed.

Description

Technical field [0001] The invention relates to a spraying process, in particular to a high-manganese steel frog casting cavity paint spraying process. Background technique [0002] The workshop mainly produces high manganese steel frogs, using VRH production line, forsterite as raw sand, with an annual output of 15,000. The high manganese steel frog has a slender and long rod structure with a complex structure. Many casting defects such as heavy skin, cold insulation, sand sticking, and sand inclusion are likely to occur during the filling process of molten steel. [0003] The existing casting coating spraying process: the alcohol-based magnesia quick-drying coating is used to evenly spray all parts of the full casting mold. This process is prone to the following quality problems: [0004] 1. Rail waist part of the frog heel end: This part is at the pouring end of the frog. During the filling process of molten steel, the coating layer is prone to stratification and the defect of h...

AI Technical Summary

Problems solved by technology

[0006] 3. Frog toe end rail waist and climbing part: this part is far away from the pouring end, but because of the inverted pouring, the liquid steel pressure at this part is the highest, and sand casting defects are prone to occur

[0007] 4. The upper and lower jaws of the frogfish tail: The structure of this part is limited, and it is difficult to spray the paint in place. In addition, during the molten steel filling of this part, three sides are wrapped by molten steel, which is very easy to form sand sticking defects

Frog process pressure table part: This part has a concave structure, it is difficult to spray the paint in place, and it is easy to form sticky sand defects

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