Preliminary Tests of Innovative Eco-Friendly Furfuryl Resins and Foundry Sand Mixtures Based on These Resins
| Autor: | Anna Łoś, Sabina Puzio, Mateusz Stachowicz, J. Kamińska, M. Angrecki |
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| Rok vydání: | 2019 |
| Předmět: |
lcsh:GE1-350
Materials science Waste management casting surface quality Environmentally friendly lcsh:TD1-1066 loose self-hardening sands mechanical tests furfuryl resin lcsh:Environmental technology. Sanitary engineering Foundry environmental protection lcsh:Environmental sciences Ecology Evolution Behavior and Systematics General Environmental Science |
| Zdroj: | Journal of Ecological Engineering, Vol 20, Iss 9, Pp 285-292 (2019) |
| ISSN: | 2299-8993 |
| DOI: | 10.12911/22998993/112510 |
| Popis: | The foundry industry in Poland and EU member states is growing steadily. Currently, foundries are facing the problem of increasing requirements, which enforce the production of castings characterized by high dimensional accuracy and surface smoothness with parallel elimination of casting defects. Castings are mostly made in moulding sand mixtures, which are also subject to more and more stringent requirements to meet the above-mentioned casting acceptance conditions. Additionally, moulding sands should ensure adequate mould stiffness to avoid the risk of dimensional deformations during pouring of this mould with liquid metal and casting solidification. For these reasons, the production of this type of castings has been dominated by loose self-hardening sands with furfuryl resin, commonly called furan sands. In the group of self-hardening sands with synthetic resins, loose self-hardening sands with furfuryl resin enjoy the greatest popularity. What accounts for this fact is the high level of the reclamability of these sands, the possibility of obtaining castings with high dimensional accuracy, the ability to make intricate moulds and cores, the binding process taking place at ambient temperature, and low content of binder. Unfortunately, this technology also has some disadvantages, which include short lifetime of the sand mixture, harmful gases evolving from the sand, and currently also high cost of the sand mixture. The anticipated tightening of environmental protection regulations in EU countries, including limiting the content of free furfuryl alcohol in resins ( |
| Databáze: | OpenAIRE |
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