Reinforcer for stripping and shelling anti-sand-sticking coating in sheet form for casting and preparation and application methods thereof

Abstract

The invention discloses a reinforcer for stripping and shelling an anti-sand-sticking coating in a sheet form for casting and preparation and application methods thereof. The reinforcer comprises the following components in percentage by weight: 35% of andalusite, 35% of mica, 7% of activated calcium carbonate, 7% of pyrophyllite, 3% of magnesium chloride, 3% of ferric oxide and 10% of Guilin No. 5 additive. The reinforcer has the advantages that the raw materials are rich in resources, cheap and easily available; the reinforcer is neutral and slightly alkaline, is clean and non-toxic and does not need to be added with any preservative; the casting coating added with the reinforcer can improve the labor conditions and working environment of casting cleaning and achieve less dust pollution; the casting cleaning efficiency is improved and the casting cleaning cost is reduced; the reinforcer has the production universality of cast iron and cast steel and simplifies the management of coating matching; and the high-temperature thermosetting shrinkage rate is equivalent to 5-7 times of the shrinkage rate of cast steel and 10-12 times of the shrinkage rate of cast iron, so that the coating in a sheet form, which is not stuck with sand, is forced to be automatically shelled and stripped without dust.

Description

technical field [0001] The invention relates to the field of anti-sand-sticking and peeling-off shelling agents for foundry coatings, in particular to an anti-sand-sticking and peeling-off shelling agent for foundry coatings and a preparation and use method thereof. Background technique [0002] Foundry production is inseparable from anti-sand sticking coatings. Since the history of casting, people have paid great attention to the exploration of the anti-sand sticking and peeling properties of casting coatings. Traditional or current casting coatings at home and abroad are mainly divided into two categories: cast iron and cast steel. Most of the cast iron coatings are reduced type. This type of reduced type coating cannot form flakes from the surface of the casting even if the graphite with high sand resistance is high. However, it is cleaned by shot blasting or wire brush in powder form, so the dust is dispersed, the pollution is serious, the cost is very high and the work ...

AI Technical Summary

Problems solved by technology

Traditional or current casting coatings at home and abroad are mainly divided into two categories: cast iron and cast steel. Most of the cast iron coatings are reduced type. This type of reduced type coating cannot form flakes from the surface of the casting even if the graphite with high sand resistance is high. However, it is cleaned by shot blasting or wire brush in powder form, so the dust is dispersed, the pollution is serious, the cost is very high and the work efficiency is very low; the coating of steel castings is mostly sintered, and the principle and prerequisite of sintering are A sufficient amount of iron oxide film layer is produced on the surface of molten steel, which is difficult to achieve for thin-walled or small steel castings, but the coating of large steel castings is not good due to the poor anti-adhesion and anti-sand infiltration of the coating layer, even if the coating The layer has been transformed into a sintered layer, which may not be able to be shelled and cleaned easily