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Browsing by Author "Grabowska, Beata"

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    Item type:Article, Access status: Open Access ,
    An assessment of the effectiveness of physical curing methods of molding sand bonded by binders based on starch and aluminosilicates
    (2015) Kaczmarska, Karolina; Grabowska, Beata; Drożyński, Dariusz; Kurleto, Żaneta; Szymański, Łukasz
    In this study, the effectiveness of curing methods by conventional heating and innovative microwave curing were compared, based on the results of determining molding sand selected properties such as permeability, tensile strength, and wear resistance. The tested molding sand used for our research was a composition of silica sand with a commercial binder in the form of Albertine F/1 (Hüttenes Albertus). This binder is a mixture of water-swellable starch derivatives and aluminosilicates. Binding in the molding sand occurred via solvent evaporation from the samples (water).The obtained results showed a dependence of molding sand properties and selected methods of physical cure, especially after one and four hours of cured-sample storage. However, after 24 hours of sample storage (as apparent from the analysis of the obtained results), both curing methods used were almost equally effective, and marked differences in the molding sand properties were located in the range of measurement uncertainty. Using electromagnetic waves in the microwave range made it possible to significantly reduce the time of curing as well as the energy consumption of the drying process.
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    Item type:Thesis, Access status: Restricted ,
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analysis of selected technological properties of green sands with starch-based additives
    (2015) Drożyński, Dariusz; Kurleto, Żaneta; Kaczmarska, Karolina; Grabowska, Beata
    This paper presents the results of determining the effect of the addition of native starch and mineral-starch mixes on selected technological properties of sands. The study was carried out on the permeability, compressive strength, and wear resistance of molding. Green sand with bentonite and silica sand was compared to green sand with the addition of Superior Standard native starch or the addition of a mineral-starch composition in the form of binder Albertine F/1. The main difference in applied starch materials is the characteristic property of native starch which is insoluble in cold water. Therefore, it was difficult to bond water added to molding sand during mixing of the ingredients in this case. However, the Albertine F/1 starch-based binder is a mixture of starch and aluminosilicates, whereas the bonding of water added into molding sand during ingredient mixing is more efficient.
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    Item type:Thesis, Access status: Restricted ,
    Badania fizykochemiczne polilaktydu (PLA) stosowanego w technologii druku 3D
    (Data obrony: 2018-01-24) Mączka, Elżbieta
    Wydział Odlewnictwa
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    Item type:Thesis, Access status: Restricted ,
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    Item type:Thesis, Access status: Restricted ,
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    Item type:Thesis, Access status: Restricted ,
    Badania wybranych właściwości masy formierskiej wiązanej spoiwem BioCo2 z dodatkiem węglowym
    (Data obrony: 2017-09-28) Gawluk, Bartosz Marcin
    Wydział Odlewnictwa
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    Item type:Thesis, Access status: Restricted ,
    Badania wybranych właściwości spoiwa polimerowego z grupy BioCo i masy formierskiej z jego udziałem
    (Data obrony: 2017-07-27) Gąsior, Paweł
    Wydział Odlewnictwa
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    Item type:Thesis, Access status: Restricted ,
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    Item type:Thesis, Access status: Restricted ,
    Badanie biodegradacji odlewniczych spoiw polimerowych w środowisku wodnym na przykładzie spoiwa $BioCo_{3}$
    (Data obrony: 2011-07-15) Witowska, Dorota Halina
    Wydział Odlewnictwa
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    Item type:Thesis, Access status: Restricted ,
    Badanie właściwości powłoki ochronnej ISOMOL 0267
    (Data obrony: 2020-01-31) Nowak, Mateusz
    Wydział Odlewnictwa
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    Item type:Thesis, Access status: Restricted ,
    Badanie właściwości powloki ochronnej MAGNESITSCHLICHTE 5848
    (Data obrony: 2020-01-31) Pajda, Marcin
    Wydział Odlewnictwa
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    Item type:Thesis, Access status: Restricted ,
    Badanie wpływu rodzaju osnowy na właściwości mechaniczne mas w technologii Alphaset
    (Data obrony: 2017-02-08) Ditrich, Damian
    Wydział Odlewnictwa
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Biodegradation of a new polymer binder based on modified starch in a water environment
    (2014) Kaczmarska, Karolina; Grabowska, Beata
    In this study, the results of biodegradability of a new polymeric binder consisting of modified starch – Polvitex Z (by Xenon) in a water solution are presented. Biodegradation tests were conducted in accordance with the Zahn–Wellens method, which is intended to denote the susceptibility to biodegradation by microorganisms (in high concentrations during the static test) of the non-volatile, watersoluble organic compounds. Observations of the decomposition process were carried out through regular, daily or at certain time intervals by measurement the Chemical Oxygen Demand (COD) and level of biodegradability (RT) in the prepared samples during the test. The study showed that the starch binder is fully biodegradable material in an aqueous medium.
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    Item type:Article, Access status: Open Access ,
    BTEX emissions from BioCo2 bonded moulding sands
    (2013) Loch, Joanna; Grabowska, Beata; Kaczmarska, Karolina
    The aim of the research was to determine the volume of BTEX emission (benzene, toluene, ethylbenzene and xylenes) from BioCo2 bonded moulding sands. BioCo2, a new polymer binder, is a water solution of two - component polymer composition (polyacrylic acid and dextrin). Research on gas emissions were performed according to the method developed at Faculty of Foundry Engineering, AGH University of Science and Technology. The measurement of BTEX samples adsorbed on activated carbon was made with the use of gas chromatography (GC-FID) and was followed by a qualitative and quantitative analysis. The research showed that the volume of BTEX emissions was lower in BioCo2 bonded moulding sand than in resin-bonded sand Kaltharz U404.
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    Item type:Thesis, Access status: Restricted ,
    Deformacja termiczna mas ze spoiwami nieorganicznymi
    (Data obrony: 2019-09-26) Hypsior, Jakub
    Wydział Odlewnictwa
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    Item type:Article, Access status: Open Access ,
    Detection of nitrates(V) and sulfates(VI) by UV-Vis spectrophotometry method in used green sand bonded by bentonite with modified starch addition
    (Wydawnictwa AGH, 2016) Grabowska, Beata; Kurleto-Kozioł, Żaneta; Szymański, Łukasz; Kaczmarska, Karolina; Bobrowski, Artur
    The research results (SEM, UV-Vis) that contain a part of the work connected with determining the influence of a modified starch addition on the physical and chemical property changes of green sands (including the emission levels of harmful substances from the used molding sands formed as a result of the liquid metal pouring of molds) are presented in this paper. A surface analysis (SEM) was performed for the fresh molding sands and used molding sands with and without modified starch samples. On the bases of the received microscopic images, the impact of the temperature factor on the morphology of the molding sand samples after the liquid metal pour- ing process are assessed. In the second part of the performed work on the UV-Vis research, eluates from two used molding sands (green sand [sand number 1] and green sand with the addition of a modified starch [sand number 2]) were tested for nitrate and sulfate content. In order to deter- mine whether the level of nitrate and sulfate elusion from the used molding sands is permissible, the received results were compared with the Minister of Environment’s regulations concerning the requirements of surface waters used for supplying the population with potable water.
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    Item type:Article, Access status: Open Access ,
    FT-IR studies of the polymeric binder BioCo1 with modified biopolymer. Part 1
    (2014) Grabowska, Beata; Kaczmarska, Karolina
    The paper presents structural studies of polymeric water soluble compositions consisting of acrylic derivatives/modified biopolymer. The research FT-IR was focused on novel polymer composition poly(acrylic acid)/modified starch (PAA/CMS) designed for application in the foundry industry - a novel group of polymeric BioCo binders. It was found, that the structure changes occur within groups: carboxyl present in poly(acrylic acid) and carboxyl and hydroxyl groups contained in carboxymethyl starch (vibrations: $ν_{s}$-C=O, $ν_{s}$-$COO^{-}$ and δ-C-O-H).
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    Item type:Article, Access status: Open Access ,
    FTIR method in studies of the resol-type phenol resin structure in the air atmosphere over certain time intervals
    (2015) Bobrowski, Artur; Grabowska, Beata
    This paper presents the results of structural-type studies of resol phenolic resin used for the preparation of molding and core sands exposed to air. The FTIR study was carried out using a transmittance technique. Recorded changes in the IR spectra of resin can indicate a progressive polycondensation process, the consequences of which being changes in the aromatic rings of methylene bridges (among others).
  • thumbnail.journal.alt
    Item type:Interactive Resource, Access status: Metadata only ,
    Inżynieria materiałowa: wybrane metody i procesy
    (2020) Grabowska, Beata; Kaczmarska, Karolina; Bobrowski, Artur
    Wydział Odlewnictwa; Centrum e-Learningu i Innowacyjnej Dydaktyki
    Kurs zawiera podstawowe informacje związane z wybranymi metodami i procesami stosowanymi w inżynierii materiałowej. Kurs składa się z sześciu modułów. Każdy z nich zawiera część teoretyczną (wprowadzenie do zagadnienia podsumowane testem) oraz praktyczną – zadanie czy problem do rozwiązania w oparciu o filmowy instruktaż i instrukcję.