Talk:Molding sand

Merger with Green sand

I think the two article should be merged, they cover, more or less, the same topic. I don't think I've heard sand called molding sand but I have heard casting sand. Iepeulas 13:01, 5 August 2007 (UTC)[reply]

I have merged the Green Sand into the molding sand category as green sand is a type of molding sand and there isn't enough info to justify two articles.Iepeulas (talk) 00:47, 21 January 2008 (UTC)[reply]

See also the parallel discussions at Talk:Green sand (casting). The merged content history is now in the page history of Green sand (casting). – wbm1058 (talk) 14:38, 26 March 2023 (UTC)[reply]

Different pages for each sand type

I think each type of sand should be listed as a different article and in the molding sand page there may be a little bit info in general about molding sand basics and links to various types of it. Pushkraj.janwadkar (talk) 10:17, 16 June 2009 (UTC)[reply]

Right now there just isn't enough information to warrant separate articles. That's why green sand was merged into this article awhile ago (as you can see in the section above). If, at some point there is enough info to warrant separate articles, it can then be split off. In the mean time I suggest you just create individual sections for each type within this article. Wizard191 (talk) 16:35, 16 June 2009 (UTC)[reply]

Green sand is an aggregate of sand, bentonite clay, pulverized coal and water. Its principal use is in making molds for metal casting. The largest portion of the aggregate is a sand, usually silica or sometimes olivine.[1] There are many recipes for the proportion of clay, but they all strike different balances between moldability, surface finish, and ability of the hot molten metal to degas. The coal, typically referred to in as sea-coal, which is present at a ratio of less than 5%, partially combusts in the surface of the molten metal, leading to the offgassing of organic vapors. Sand casting is one of the earliest forms of casting practiced due to the simplicity of materials involved. It still remains one of the cheapest ways to cast metal because of that same simplicity. Other methods of casting, such as those using shell molds, boast higher quality of surface finish but have a higher cost. Green sand (like other casting sands) is usually housed in what foundry workers refer to as "flask", which are nothing other than boxes without a bottom or lid. The box is split into two halves which are stacked together in use. The halves are referred to as the cope and drag flask respectively.

Green sand is an aggregate of sand, bentonite clay, pulverized coal and water. Its principal use is in making molds for metal casting. The largest portion of the aggregate is a sand, usually silica or sometimes olivine. There are many recipes for the proportion of clay, but they all strike different balances between moldability, surface finish, and ability of the hot molten metal to degas. The coal, typically referred to in as sea-coal, which is present at a ratio of less than 5%, partially combusts in the surface of the molten metal, leading to the offgassing of organic vapors.

Sand casting is one of the earliest forms of casting practiced due to the simplicity of materials involved. It still remains one of the cheapest ways to cast metal because of that same simplicity. Other methods of casting, such as those using shell molds, boast higher quality of surface finish but have a higher cost.

Green sand (like other casting sands) is usually housed in what foundry workers refer to as "flask", which are nothing other than boxes without a bottom or lid. The box is split into two halves which are stacked together in use. The halves are referred to as the cope and drag flask respectively. 2409:408D:29F:5731:0:0:1CB5:88AC (talk) 02:44, 6 November 2024 (UTC)[reply]