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Base sands for manufacture of foundry moulds and cores
Sedláčková, Petra ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
This bachelor thesis describes a summary of sands which are used for foundry molding materials, and includes fields of their utilization. Surface structures of grains as well as their typical chemical and physical parameters are introduced. Czech quartz sands Provodín and Střeleč are described, further also the Slovak sand Šajdíkove Humence, Polish sands Szczakowa a Grudzeń Las, German sands Frechen and Haltern, and the American sand GBM. Out of non-quartz sands, there are listed: chamotte, Molochit, LK Sand from the Sand Team company, ceramic sands CKL and CKI from the Giba company, olivine, dunit (Magnolit), zircon, chromite, magnesite and chrom-magnesite, salt (salt cores). In the summary, there are also listed special sands of the German Hüttenes-Albertus company which are described in detail in Appendix 1. Sands are compared in graphs and tables according to these requirements: thermal expansion, a grain shape and medium grain size, a volume of elutriated parts smaller than 0.9 mm, refractoriness and a point of sintering.
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