Archives

Drying of casting coating

Drying is the process of removing the carrier from the coating. The sand core should be dried in time after coating. Otherwise, the water (carrier) will react with the cold core resin group, which will reduce the coating strength of the sand core surface and cause quality problems in...

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Suspension control of casting coatings

Suspensibility refers to the ability of coating to resist stratification and precipitation of solid refractory powder. On the premise of ensuring other properties, the higher the suspensibility, the better. Good suspension, uniform coating, no flow, simple operation, easy drying, high strength and no cracking after drying. There are many...

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Application and control of casting coating density

Uniform and stable coating composition is the basis to ensure the coating process performance, which belongs to static control for the user, and the stability of incoming materials is guaranteed by the coating supplier. However, due to the change of water evaporation, refractory powder segregation, viscosity and density, it...

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Casting flow coating and its equipment

1. Refractory powder Commonly used refractory powders include zircon powder, brown steel jade powder, bauxite powder, quartz powder, mullite powder, chromite powder, magnesia powder, etc. zircon powder is an excellent refractory powder for cast steel. Zircon powder, namely zirconium decanoate powder, becomes zro267.2%, sio232.8%, melting point 2430 ± 20...

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Basic properties and test methods of flow coating

1.Properties of flow coating (1) The rheological properties meet the requirements of flow coating process. (2) Suitable coating thickness. Generally, the coating thickness difference should be ≤ 0.2mm. (3) With appropriate permeability. The diameter of sand particles with a surface depth of 1.5-2 times. Some of the following performance...

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