Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder
Moulding sands with an inorganic binder are mainly used in non-ferrous metal casting employed in the automotive industry. The disqualifying factor for their use in iron alloy casting is their high final strength, associated with further solidification of the water glass as the temperature rises. The...
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Polish Academy of Sciences
2025-06-01
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| Series: | Archives of Foundry Engineering |
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| Online Access: | https://journals.pan.pl/Content/135490/AFE%202_2025_12-Final.pdf |
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| author | J. Jakubski D. Halejcio |
| author_facet | J. Jakubski D. Halejcio |
| author_sort | J. Jakubski |
| collection | DOAJ |
| description | Moulding sands with an inorganic binder are mainly used in non-ferrous metal casting employed in the automotive industry. The disqualifying factor for their use in iron alloy casting is their high final strength, associated with further solidification of the water glass as the temperature rises. The subject addressed in this study aims to improve the knockout properties of moulding sands with water glass. In this case, a foundry sand additive of geological origin was used. This additive is a reclaimed waste from the construction industry. The moulding sand was made with a binder, which was water glass R145 (3.5 parts by weight), and as a hardener, Flodur 1 was used in a ratio of 5% to the binder and additionally, 2 and 3 parts by weight of an additive with grain sizes of 0.2mm, 0.16mm, and 0.10mm were used. Research was conducted on the impact of strength on bending and stretching, as well as permeability. Subsequently, a test was carried out in accordance with the Polish standard PN-85/H11005 by pouring the mould with liquid metal. It was demonstrated that the investigated additive does not have a negative impact on bending strength and permeability values and reduces the amount of work required to remove the core from the cast iron casting. |
| format | Article |
| id | doaj-art-605bc6dca79249e49f1c7445967a9e79 |
| institution | Kabale University |
| issn | 2299-2944 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Foundry Engineering |
| spelling | doaj-art-605bc6dca79249e49f1c7445967a9e792025-08-20T03:32:27ZengPolish Academy of SciencesArchives of Foundry Engineering2299-29442025-06-01vol. 25No 28993https://doi.org/10.24425/afe.2025.153800Improving the Knock-Out Properties of Moulding Sands with an Inorganic BinderJ. Jakubski0https://orcid.org/0000-0001-8767-2907D. Halejcio1https://orcid.org/0009-0004-0189-2992AGH University of Krakow, PolandAGH University of Krakow, PolandMoulding sands with an inorganic binder are mainly used in non-ferrous metal casting employed in the automotive industry. The disqualifying factor for their use in iron alloy casting is their high final strength, associated with further solidification of the water glass as the temperature rises. The subject addressed in this study aims to improve the knockout properties of moulding sands with water glass. In this case, a foundry sand additive of geological origin was used. This additive is a reclaimed waste from the construction industry. The moulding sand was made with a binder, which was water glass R145 (3.5 parts by weight), and as a hardener, Flodur 1 was used in a ratio of 5% to the binder and additionally, 2 and 3 parts by weight of an additive with grain sizes of 0.2mm, 0.16mm, and 0.10mm were used. Research was conducted on the impact of strength on bending and stretching, as well as permeability. Subsequently, a test was carried out in accordance with the Polish standard PN-85/H11005 by pouring the mould with liquid metal. It was demonstrated that the investigated additive does not have a negative impact on bending strength and permeability values and reduces the amount of work required to remove the core from the cast iron casting.https://journals.pan.pl/Content/135490/AFE%202_2025_12-Final.pdfknock-out propertiesinorganic bindermoulding sandsgeological additivesand matrix modification |
| spellingShingle | J. Jakubski D. Halejcio Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder Archives of Foundry Engineering knock-out properties inorganic binder moulding sands geological additive sand matrix modification |
| title | Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder |
| title_full | Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder |
| title_fullStr | Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder |
| title_full_unstemmed | Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder |
| title_short | Improving the Knock-Out Properties of Moulding Sands with an Inorganic Binder |
| title_sort | improving the knock out properties of moulding sands with an inorganic binder |
| topic | knock-out properties inorganic binder moulding sands geological additive sand matrix modification |
| url | https://journals.pan.pl/Content/135490/AFE%202_2025_12-Final.pdf |
| work_keys_str_mv | AT jjakubski improvingtheknockoutpropertiesofmouldingsandswithaninorganicbinder AT dhalejcio improvingtheknockoutpropertiesofmouldingsandswithaninorganicbinder |