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Casting Process

    Silica Sol Casting

    Silica Sol Investment Casting is a form of investment casting. The process is very similar except that the investment mould is made from silica sol zircon sand mixed with refractory powder. Silica sol zircon sand is exceptionally fine-grained (10-20 Microns) and can be mixed to a slurry with very low viscosity when creating the mould. The result is a casting method that delivers dimensionally accurate castings with excellent as-cast surface finishes. Crucially, the silica sol zircon mould can withstand temperatures up to 2000°C, making them very useful when casting high temperature alloy steels and stainless steels.

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    Process

    Silica sol Casting (Green Wax)

    Mold

    General Aluminum Mold & Steel Mold

    Mold Material

    Middle Temperature Wax

    Mold Shell

    Silica sol, Mullite Sand, Zircon Sand

    Technology Characteristics

    Suitable for producing small parts. Better precision. Better surface

    roughness. Can large extent reduce machining.

    Tolerance Range

    CT5 to CT6

    Single Weight

    0.01kgs to 30kgs

    Surface Roughness

    RA6.3

    Casting Material Type

    Carbon Steel, Alloy Steel, Stainless Steel, Ductile Iron.

    Common Material Specification

    GB, ASTM,SAE,AISI,DIN,BS,JIS,NF,EN,AAR,ISO

    Product application field

    Automobile, Engineering Machinery, Railway, Marine, Agricultural

    Machinery, Mining and other industrial fields

    Advantages& disadvantages

    Environmental protection, surface roughness is better than RA6.3,

    but the price is 1.0-2.0 yuan /KG higher than sodium silicate

    Lost Foam Casting

    Lost foam casting is a type of evaporative pattern casting. This method is quite similar to investment casting which uses wax instead of foam in the pattern making process. The foam pattern was first used in metalworking in 1958. Although this mold casting technique is not as popular as other methods such as sand mold casting or permanent casting, it maintains outstanding advantages, especially in casting complicated and precise molds.

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    Process

    Lost Foam Casting

    Pattern

    General Aluminum mould & Steel mold

    Mould Material

    STMMA Copolymer Resin

    Mould Shell

    Fireproof Coating

    Technology Characteristics

    Instead of the traditional sand Mold casting. Without the core-making

    process. Better dimensional accuracy.

    Tolerance Range

    CT8 to CT9

    Single Weight

    0.2kgs to 200kgs

    Surface Roughness

    RA12.5

    Casting Material Type

    Grey Iron and Ductile Iron, Alloy Steel

    Common Material Specification

    GB, ASTM,SAE,AISI,DIN,BS,JIS,NF,EN,AAR,ISO

    Product application field

    Automobile, Engineering Machinery, Railway, Marine, Agricultural

    Machinery, Mining and other industrial fields

    Water Glass Casting

    Water glass Investment casting is very similar to investment casting (i.e. the lost wax method), but is particularly suited to larger castings and is cheaper to produce. The process provides a far superior surface finish and dimensional precision to that achieved through sand casting, and more complex shapes can be achieved. In addition to steels, it is possible to cast alternative materials such as iron and SG iron using this method.

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    Process

    Water glass Casting

    Mold

    General Aluminum Mold & Steel Mold

    Mold Material

    Low Temperature Wax

    Mold Shell

    Sodium Silicate, Quartz Sand

    Technology Characteristics

    Suitable for complicated structures. Reduced machining allowance. Decrease production cost.

    Tolerance Range

    CT7 to CT9

    Single Weight

    0.5kgs to 200kgs

    Surface Roughness

    RA12.5

    Casting Material Type

    Carbon Steel, Alloy Steel, Grey Iron and Ductile Iron

    Common Material Specification

    GB, ASTM,SAE,AISI,DIN,BS,JIS,NF,EN,AAR,ISO

    Product application field

    Automobile, Engineering Machinery, Railway, Marine,

    Agricultural Machinery, Mining and other industrial fields

    Lost Wax Investment Casting

    Lost wax casting builds a mold around a sacrificial wax model. After the mold investment is set, the wax is melted out and forms a cavity where the metal or glass flows in. Using this method of casting captures fine details in both metal and glass. This ancient method has been used since 3000 B.C. to visually capture the stories of ancient cultures and religions throughout history.

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    Process

    Lost wax investment casting

    Pattern

    General Aluminum mould & Steel mold

    Mould Material

    Low Temperature Wax

    Mould Shell

    (the first two layers)Silica sol+Zircon Sand,(other layers )Sodium Silicate

    Technology Characteristics

    Suitable for small products with high surface quality requirements

    Tolerance Range

    CT5-CT7

    Single Weight

    Below 2KGS

    Surface Roughness

    RA6.3

    Casting Material Type

    Carbon Steel, Alloy Steel, Grey Iron and Ductile Iron

    Common Material Specification

    GB, ASTM,SAE,AISI,DIN,BS,JIS,NF,EN,AAR,ISO

    Product application field

    automobile, Engineering Machinery, Railway, Marine, Agricultural

    Machinery, Mining and other industrial fields

    Advantages& disadvantages

    Environmental protection, surface roughness is better than RA6.3,

    but the price is 1.0-2.0 yuan /KG higher than sodium silicate

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