Sprue bushes are made from NR-85 calcium silicate boards materials, it is high-density calcium silicate board, which are used in aluminum casting and foundry industries due to their heat resistance and non-wetting properties with molten aluminum.
Non-Wetting: These materials are not wetted by liquid non-ferrous metals, preventing them from sticking or reacting with the molten metal.
Machinability: High-density calcium silicate board is easily machinable, allowing for the creation of complex shapes like spouts, floats, and hot top ring headers.
Asbestos-Free: Calcium silicate materials, NR-85 & NR-110, etc, are asbestos-free, making them a safe and environmentally friendly option.
Reliable Performance: The heat resistance and non-wetting properties of calcium silicate ensure reliable performance in high-temperature applications.
Durability: The material's strength and dimensional stability contribute to its durability.
Versatility: Calcium silicate can be used in various casting applications, including aluminum and other non-ferrous metals.
Sprue Bushes: Calcium silicate sprue bushes are used to guide and control the flow of molten aluminum into molds.
Other Components: Besides sprue bushes, calcium silicate is also used for spouts, tubes, nozzles, and feeder box liners in aluminum casting.
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