Temat: hardener - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: New look at the process of reclamation of moulding sands
Autorzy:: Dobosz, S. M.
Major-Gabryś, K.
Hosadyna, M.
Powiązania:: https://bibliotekanauki.pl/articles/380262.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
masa formierska
innovative foundry materials
innovative foundry technologies
moulding sand
reclaim
ester hardener
Opis:: This paper presents a new perspective on the issue of reclamation of moulding and core sands. Taking as a premise that the reclamation process must remain on the surface of grains some not separated binding materials rests, it should be chosen the proper moulding sand's composition that will be least harmful for the reclaim quality. There are two different moulding and core sands taken into examinations. The researches prove that a small correction of their compositions (hardener type) improves the quality of the received reclaims. Carried out in this article studies have shown that such an approach to the problem of reclamation of the moulding and core sands is needed and reasonable.
Źródło:: Archives of Foundry Engineering; 2012, 12, 3; 19-24
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Organic Moulding Sands for Production of Large-Size Castings
Autorzy:: Major-Gabryś, K.
Hosadyna-Kondracka, M.
Powiązania:: https://bibliotekanauki.pl/articles/382360.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative foundry technologies
innovative materials
moulding sand
organic binder
furfuryl resin
hardener
alkyd resin
alphaset process
innowacyjne technologie odlewnicze
materiały innowacyjne
piasek formierski
spoiwo organiczne
żywica furfurylowa
utwardzacz
żywica alkidowa
Opis:: Recently, some major changes have occurred in the structure of the European foundry industry, such as a rapid development in the production of castings from compacted graphite iron and light alloys at the expense of limiting the production of steel castings. This created a significant gap in the production of heavy steel castings (exceeding the weight of 30 Mg) for the metallurgical, cement and energy industries. The problem is proper moulding technology for such heavy castings, whose solidification and cooling time may take even several days, exposing the moulding material to a long-term thermal and mechanical load. Owing to their technological properties, sands with organic binders (synthetic resins) are the compositions used most often in industrial practice. Their main advantages include high strength, good collapsibility and knocking out properties, as well as easy mechanical reclamation. The main disadvantage of these sands is their harmful effect on the environment, manifesting itself at various stages of the casting process, especially during mould pouring. This is why new solutions are sought for sands based on organic binders to ensure their high technological properties but at the same time less harmfulness for the environment. This paper discusses the possibility of reducing the harmful effect of sands with furfuryl binders owing to the use of resins with reduced content of free furfuryl alcohol and hardeners with reduced sulphur content. The use of alkyd binder as an alternative to furfuryl binder has also been proposed and possible application of phenol-formaldehyde resins was considered.
Źródło:: Archives of Foundry Engineering; 2019, 3; 99-105
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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