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Title: Laser Sintering of Silica Sand - Mechanism and Application to Sand Casting Mould
Authors: Wang, X.H. 
Fuh, J.Y.H. 
Wong, Y.S. 
Tang, Y.X. 
Keywords: Laser sintering
Rapid prototyping
Sand casting
Silica sand
Issue Date: 2003
Citation: Wang, X.H., Fuh, J.Y.H., Wong, Y.S., Tang, Y.X. (2003). Laser Sintering of Silica Sand - Mechanism and Application to Sand Casting Mould. International Journal of Advanced Manufacturing Technology 21 (12) : 1015-1020. ScholarBank@NUS Repository.
Abstract: Silica sand is commonly used in the foundry industry. With a high melting point of 1600°C, the silica sand is normally sintered in a high-temperature furnace. However, silica with contents of calcium, aluminium, magnesium, and chlorine, etc. can form low-melting point eutectics. Therefore, a relatively low-power laser can be used to sinter the silica sand directly. The investigation of the mechanism and process for direct laser sintering of the silica sand, without any binder, is presented in this paper. Combined with rapid prototyping (RP) technology, the laser sintering of the silica sand can be used to directly fabricate a sand casting mould, called a rapid sand casting mould. By avoiding the time-consuming process of fabricating a pattern, the rapid sand casting mould process has the potential of further reducing the lead time for producing a casting product. Some important issues, such as the lead time of producing a sand mould, its accuracy, and surface finish, etc., are discussed.
Source Title: International Journal of Advanced Manufacturing Technology
ISSN: 02683768
DOI: 10.1007/s00170-002-1424-x
Appears in Collections:Staff Publications

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