Wszystkie pola: Grabarczyk, M - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Measurement of Molding Sand Elasticity
Autorzy:: Major-Gabryś, K.
Grabarczyk, A.
Dobosz, S.M.
Jakubski, J.
Morek, J.
Beňo, J.
Powiązania:: https://bibliotekanauki.pl/articles/106977.pdf
Data publikacji:: 2018
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: molding sands
mechanical deformation
elasticity
hot-distortion
Opis:: The progressive mechanization and automation of industrial equipment is the driving force of progress, not only in the field of production but also in the measuring and control equipment. In mold production, the automation of processes such as forming molds and cores along with their assembly has led to increases in serial production, reductions in defects, and the shortening of molding times, among others. Thanks to automation in mold and core departments and the use of all sorts of manipulators, mold production in foundries has gained momentum. Unfortunately, in addition to the mentioned advantages, there are also new challenges as to the quality and properties of the molding and core sands used in highly automated foundries.This article presents recent research on molding sand elasticity. The topic was introduced as an attempt to answer the new needs of highly mechanized foundries. The article discusses a new method of measuring the resistance of molding materials to undergoing mechanical deformation (molding sand elasticity), with an additional analysis of the bending strengths of the tested samples. Precise measurements, test sample preparation, and interpretation of the received results are presented in the article.
Źródło:: Journal of Casting & Materials Engineering; 2018, 2, 2; 38-44
2543-9901
Pojawia się w:: Journal of Casting & Materials Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Influence of Moulding Sand Type on Mechanical and Thermal Deformation
Autorzy:: Grabarczyk, A.
Major-Gabryś, K.
Dobosz, S. M.
Jakubski, J.
Bolibruchová, D.
Brůna, M.
Pastirčák, R.
Powiązania:: https://bibliotekanauki.pl/articles/353843.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: foundry engineering
moulding sand
core sand
organic binder
inorganic binder
mechanical deformation
thermal deformation
Opis:: Casting industry has been enriched with the processes of mechanization and automation in production. They offer both better working standards, faster and more accurate production, but also have begun to generate new opportunities for new foundry defects. This work discusses the disadvantages of processes that can occur, to a limited extend, in the technologies associated with mould assembly and during the initial stages of pouring. These defects will be described in detail in the further part of the paper and are mainly related to the quality of foundry cores, therefore the discussion of these issues will mainly concern core moulding sands. Four different types of moulding mixtures were used in the research, representing the most popular chemically bonded moulding sands used in foundry practise. The main focus of this article is the analysis of the influence of the binder type on mechanical and thermal deformation in moulding sands.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 1; 347-351
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Mechanical and Thermal Deformation of Hot-box Moulding Sands
Autorzy:: Grabarczyk, A.
Major-Gabryś, K.
Dobosz, S. M.
Jakubski, J.
Powiązania:: https://bibliotekanauki.pl/articles/381390.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative foundry material
innovative foundry technology
mechanical properties
moulding sand deformation
hot distortion
innowacyjny materiał odlewniczy
innowacyjna technologia odlewnicza
właściwości mechaniczne
odkształcenie masy formierskiej
deformacja cieplna
Opis:: The constantly developing and the broadly understood automation of production processes in foundry industry, creates both new working conditions - better working standards, faster and more accurate production - and new demands for previously used materials as well as opportunities to generate new foundry defects. Those high requirements create the need to develop further the existing elements of the casting production process. This work focuses on mechanical and thermal deformation of moulding sands prepared in hot-box technology. Moulding sands hardened in different time periods were tested immediately after hardening and after cooling. The obtained results showed that hardening time period in the range 30-120 sec does not influence the mechanical deformation of tested moulding sands significantly. Hot distortion tests proved that moulding sands prepared in hot-box technology can be characterized with stable thermal deformation up to the temperature of circa 320 °C.
Źródło:: Archives of Foundry Engineering; 2018, 18, 4; 55-58
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Elastyczność – nowe kryterium oceny jakości mas formierskich
Elasticity - a New Quality Assessment Criterion for Moulding Sands
Autorzy:: Grabarczyk, A.
Dobosz, S. M.
Major-Gabryś, K.
Jakubski, J.
Morek, J.
Powiązania:: https://bibliotekanauki.pl/articles/380078.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: masa formierska
masa samoutwardzalna
masa sypka
elastyczność
deformacja cieplna
moulding sand
self hardening moulding sand
elasticity
hot distortion
Opis:: Współczesne odlewnictwo cechuje wysoki stopień automatyzacji w procesach produkcji masowej. Wspomaganie procesów zakładania rdzeni i składania form odlewniczych przez wszelkiego rodzaju manipulatory oraz roboty przyczynia się do pękania form oraz rdzeni podczas montażu. Często występujące uszkodzenia rdzeni są wynikiem niskiej elastyczności mas formierskich, nawet przy wysokiej wytrzymałości rdzeni. W celu zbadania tego zjawiska opracowany został specjalny moduł pomiarowy połączony z klasycznym pomiarem skłonności mas do odkształceń w wysokich temperaturach – hot distortion. W ramach niniejszej pracy przedstawiona zostanie szczegółowo metodyka pomiaru oraz wstępne badania elastyczności i deformacji cieplnej dla sypkich mas samoutwardzalnych ze spoiwem furfurylowym oraz alkidowym o określonych składach.
Modern casting is characterized by a high degree of automation in the processes of mass production. Supporting the processes of inserting cores and composing the moulds with all kinds of manipulators and robots leads to breakage of both cores and moulds during installation. Common core damages are the result of low elasticity of the moulding sands, despite high strength resistance of the cores. In order to investigate this phenomenon a special measuring module, connected with a classical measurement of the tendency of moulding sands to deform in high temperatures-hot distortion, has been developed. Within the framework of this paper the methods of measurement and preliminary research of elasticity and thermal deformation of self-hardening moulding sands with furfuryl and alkyd binders will be presented.
Źródło:: Archives of Foundry Engineering; 2015, 15, 4 spec.; 39-42
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Influence of Quartz Sand Quality on Bending Strength and Thermal Deformation of Moulding Sands with Synthetic Binders
Autorzy:: Dobosz, S. M.
Grabarczyk, A.
Major-Gabryś, K.
Jakubski, J.
Powiązania:: https://bibliotekanauki.pl/articles/380092.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative foundry technology
innovative foundry material
quartz sand
moulding sand
synthetic resin
hot distortion
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
piasek kwarcowy
masa formierska
żywica syntetyczna
Opis:: Modern techniques of castings production, including moulding sands production, require a strict technological regime and high quality materials. In the case of self-hardening moulding sands with synthetic binders those requirements apply mainly to sand, which adds to more than 98% of the whole moulding sand mixture. The factors that affect the quality of the moulding sands are both chemical (SiO₂, Fe₂O₃ and carbonates content) and physical. Among these factors somewhat less attention is paid to the granulometric composition of the sands. As a part of this study, the effect of sand quality on bending strength Rg^u and thermal deformation of self-hardening moulding sands with furfural and alkyd resin was assessed. Moulding sands with furfural resin are known [1] to be the most susceptible to the sand quality. A negative effect on its properties has, among others, high content of clay binder and so-called subgrains (fraction smaller than 0,1mm), which can lead to neutralization of acidic hardeners (in the case of moulding sands with furfuryl resin) and also increase the specific surface, what forces greater amount of binding agents. The research used 5 different quartz sands originating from different sources and characterized with different grain composition and different clay binder content.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2; 9-12
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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