High quality casting coating should sand adhesion resistant ability, coating does not peel off, can obtain a smooth surface of casting. Thin type, core coating capable of forming a layer having the physical strength of the hard shell, can independently withstand high temperature impact, isolation and barrier function.
Furan resin sand molding characteristics, the casting thin sections use a water-based graphite coating, in casting thick parts, guiding parts of alcohol-based zircon powder coating.
Resin sand modeling has its advantages, but also has its weaknesses, namely the poor thermal stability, high strength, resistance to high temperature low flushing time is short, especially the gating system position, was a long time high temperature erosion is easy to fall off, causing the casting defects such as voids and sand.
The high temperature resistant material S.X as the basic material, with several refractoriness high powder ( powder quartz,zircon powder, high bauxite powder) as aggregate, L.X as binder, using chemical reaction from the hard, form a desired shape and size, with enough strength and rigidity of the gating system.
The gating system of high temperature resistant, can bear high temperature erosion, work up to a temperature of 1400DEG C, especially for major pieces of resin sand casting system; have sufficient strength and rigidity, in molding and core making process does not change the shape size, in operation is not easy to be damaged, do not need to be inserted nails, paint brush, simple operation; simplify the gating system design process, without the gate core, can save the outer core head and a core box; easy to control the internal dimension, inner surface smooth, do not hinder the rapid flow of after pouring molten iron; leave no residue, easy sand reclamation.
Furan resin sand molding production casting shape from simple to complex cylinder flange, castings from a few kilograms to more than 80tons of machine work, more than 130 tons of steel ingot mould, moulding method with samples of moulding, also has a core assembly molding. Furan resin sand molding production out of high precision casting size, outline clear,the inherent quality to meet the design requirements.
Because of the worldwide range of environmental crisis, the energy crisis and increasingly fierce competition in the market,forcing the foundry industry is constantly seeking to environmental protection and energy saving, high efficiency green casting. Furan resin sand properties make it applied widely more and more, has been worldwide accepted by most foundry enterprises.
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