Industrial Casting & Casting Parts

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Carbon Dioxide Casting

The sand mixture used in this process is pure silica and sodium silicate. The molding mixture thus obtained is rammed around the pattern and gassed with carbon dioxide (CO2). The molding mixture gets hardened due to the formation of silica gel. After passing CO2, the pattern is removed and the mold cavity is ready for pouring. Properties of silicates vary according to the silica (SiO2)-soda (NaO) ratio of the sodium silicate base that is used to formulate the binder. Considerable care must be used when gassing with CO2 since overgassing and undergassing adversely affect the properties of the cured binding system. The amount of silicate binder used for cores and molds varies from 3% to 6% depending on the type of sand, grain fineness, and degree of sand contaminants.

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Permanent Mold Casting

The casting profile is machined into a specialty mould material (two or more depending on the complexity of the part), along with the gating system. The machined molds are then assembled along with required cores into a die assembly. The metal is poured into a die which then flows under gravity while being skillfully tilted to fill the mould appropriately. manufacture permanent mold castings ranging from a few grams to up to about 20 kilograms. While the smaller sizes are manufactured by manual process, the bigger sizes are manufactured on machine with automated PLC controlled tilting and mold coating facility.

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Shell Moulding Casting

Shell mold casting process is a technique in which liquid metal is poured into a cavity formed from a sand mixture. Shell molding process offers better surface finish, better dimensional tolerances, and higher throughput due to reduced cycle times and the fact that the process can be automated. These qualities of precision can be obtained in a wider range of alloys and with greater flexibility in design than die-casting and at a lower cost than investment casting.

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