Autor: Dańko, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Badania jakości regeneratu ze zużytych mas ze spoiwem organicznym
Investigations of the matrix quality in the circulation process of moulding sands with an organic binder
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/382161.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: jakość regeneratu
masa formierska
gazotwórczość
matrix quality
moulding sand
gas evolution
Opis:: W publikacji przedstawiono uzupełniające metody badań oraz aparaturę do oceny jakości regeneratu i tych właściwości mas formierskich ze spoiwami utwardzanymi chemicznie, przygotowywanych z regeneratem, które są istotne dla kompleksowej oceny procesu recyklingu osnowy. Nowoczesne systemy oceny mas formierskich wymagają bardziej wnikliwego podejścia do czynników decydujących zarówno o ich przydatności technologicznej jak również o wpływie na otaczające środowisko naturalne. W tym kontekście pełna ocena jakości zregenerowanej osnowy wykracza poza zwyczajowo stosowane metody instrumentalne i wymaga ich uzupełnienia o bardziej zaawansowane aparaturowo metody badawcze. Pozwala to szerzej spojrzeć na ocenę zregenerowanej osnowy, zarówno w aspekcie jej użycia do sporządzania mas formierskich, jako substytutu świeżego piasku, ale także pod kątem ochrony środowiska. Do takich nowoczesnych metod można zaliczyć między innymi analizę ziarnową regeneratu za pomocą dyfrakcji laserowej, a także ocenę gazotwórczości masy formierskiej oraz identyfikację rodzaju emitowanych gazów i zawartości w nich gazów z grupy BTEX, które są szczególnie niebezpieczne z punktu widzenia BHP.
Modern investigation methods and equipment for the quality estimation of the moulding sands matrices with organic binders, in their circulation process, are presented in the paper. These methods, utilising the special equipment combined with the authors investigation methods developed in the Faculty of Foundry Engineering, AGH the University of Science and Technology, allow for the better estimation of the matrix quality. Moulding sands systems with organic binders require an in-depth approach to factors deciding on the matrix technological suitability as well as on their environmental impact. Into modern methods allowing for the better assessment of the matrix quality belongs the grain size analysis of the reclaimed material performed by means of the laser diffraction and also the estimation of the moulding sand gas evolution rate and identification of the emitted gases and their BTEX group gases content, since they are specially hazardous from the point of view of the Occupational Safety and Health.
Źródło:: Archives of Foundry Engineering; 2012, 12, 1s; 21-26
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Validation of the Theoretical Model of Determining the Strength of Cores Made by the Blowing Method
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/380304.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moulding sand
core sand
blowing method
core properties
masa formierska
masa rdzeniowa
metoda wdmuchiwania
właściwości rdzenia
Opis:: Core sands for blowing processes, belong to these sands in which small amount of the applied binding material has the ability of covering the sand matrix surface in a way which - at relatively small coating thickness - allows to achieve the high strength. Although the deciding factor constitute, in this aspect, strength properties of a binder, its viscosity and ability to moisten the matrix surface, the essential meaning for the strength properties of the prepared moulding sand and the mould has the packing method of differing in sizes sand grains with the coating of the binding material deposited on their surfaces. The knowledge of the influence of the compaction degree of grains forming the core on the total contact surface area can be the essential information concerning the core strength. Forecasting the strength properties of core sands, at known properties of the applied chemically hardened binder and the quartz matrix, requires certain modifications of the existing theoretical models. They should be made more realistic with regard to assumptions concerning grain sizes composition of quartz sands and the packing structure deciding on the active surface area of the contacts between grains of various sizes and - in consequence - on the final strength of cores.
Źródło:: Archives of Foundry Engineering; 2017, 17, 3; 27-30
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Assessment method of overheating degree of a spent moulding sand with organic binder, after the casting process
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/381504.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moulding sand
thermal degradation
organic binder
simulation calculations
masa formierska
degradacja termiczna
spoiwo organiczne
obliczenia symulacyjne
Opis:: A proper management of sand grains of moulding sands requires knowing basic properties of the spent matrix after casting knocking out. This information is essential from the point of view of the proper performing the matrix recycling process and preparing moulding sands with reclaimed materials. The most important parameter informing on the matrix quality – in case of moulding sands with organic binders after casting knocking out – is their ignition loss. The methodology of estimating ignition loss of spent moulding sands with organic binder – after casting knocking out - developed in AGH, is presented in the paper. This method applies the simulation MAGMA software, allowing to determine this moulding sand parameter already at the stage of the production preparation.
Źródło:: Archives of Foundry Engineering; 2013, 13, 2; 11-16
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Assessment of Core Sands Properties in Blowing Process
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/381670.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: foundry
core
blowing process
core sand
odlewnictwo
rdzeń odlewniczy
masa rdzeniowa
Opis:: The effects of filling the core box cavity and sand compaction in processes of core production by blowing methods (blowing, shooting) depend on several main factors. The most important are: geometrical parameters of cavity and complexity of its shape, number, distribution and shape of blowing holes feeding sands as well as the venting of a technological cavity. Values of individual parameters are selected according to various criteria, but mostly they should be adjusted to properties of the applied core sand. Various methods developed by several researchers, including the authors own attempts, allow to assess core sands properties on the basis of special technological tests projecting the process into a laboratory scale. The developed criteria defining a degree or a filling ability factor provide a better possibility of assessing the core sand behaviour during flowing and core box filling, which indicate the value and structure of the obtained compacting decisive – after hardening – for strength and permeability. The mentioned above aspects are analysed – on the basis of authors’ own examinations - in the hereby paper.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2 spec.; 13-16
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 the Matrix Grain Size on the Apparent Density and Bending Strength of Sand Cores
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/383095.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moulding sand
core sand
blowing method
inorganic binder
bending strength
piasek formierski
piasek rdzeniowy
spoiwo nieorganiczne
wytrzymałość na zginanie
Opis:: The results of investigations of the influence of the matrix grain sizes on properties of cores made by the blowing method are presented in the hereby paper. Five kinds of matrices, differing in grain size compositions, determined by the laser diffraction method in the Analysette 22NanoTec device, were applied in investigations. Individual kinds of matrices were used for making core sands in the Cordis technology. From these sands the shaped elements, for determining the apparent density of compacted sands and their bending strength, were made by the blowing method. The shaped elements (cores) were made at shooting pressures being 3, 4 and 5 atn. The bending strength of samples were determined directly after their preparation and after the storing time of 1 hour.
Źródło:: Archives of Foundry Engineering; 2017, 17, 1; 27-30
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigations of the Mechanism of the Sand Shooting into the Core Box
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/379842.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: core
core box
sand shooting
deaerating
rdzeń
rdzenie skrzynkowe
piaskowanie
odpowietrzanie
Opis:: The results of investigations of sand shooting into the core box are presented in the hereby paper. The investigations concern the formation of the diphase sand-air flux, its motion, flowing and compaction in the cavity during the core forming. Conditions deciding on the course of individual phases of the process are discussed with taking into consideration the influence of such factors as: the shot pressure, shooting hole diameter, number and distribution of deaerating vents in experimental core boxes (of a single cavity and of multi cavities) on the core sand compaction state. Investigations were performed by means of the modernised experimental shooting machine SR-3D, of the shooting chamber volume of 3.3 dm3, connected with the system of pneumatic supply ensuring the stable pressure supply of values: 0.4 MPa, 0.5 MPa and 0.6 MPa. Two diameters of the shooting hole, equal 10 mm and 20 mm, were applied for filling three experimental core boxes differing in dimensions of cavities and in number and distribution of deaerating vents. The filling process of core boxes was recorded by means of the digital camera PHANTOM V210 with the filming rate of 3000 pictures in second. Simultaneously, during the shot, other values allowing to determine the intensity of the core sand outflow from the shooting chamber to the core box, were tested. The presented in this publication results constitute the important element of the experimental verification of the blowing process simulation calculations which will be performed.
Źródło:: Archives of Foundry Engineering; 2018, 18, 3; 113-119
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Compaction of Cores Made by Blowing Methods – Model Investigations
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/380080.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: core shooting
blowing process
core sand
core box
rdzeń wstrzeliwany
masa rdzeniowa
rdzeń odlewniczy
Opis:: The results of model investigations of the influence of the blowing process selected parameters on the distribution of the compaction of the core made by the blowing method, are presented in the hereby paper. These parameters were: shooting pressure, shooting hole diameter, amount and distribution of deaerating holes. Investigations were performed using the horizontal core box of the cuboidal cavity and the same core box into which inner inserts were introduced. These inserts were dividing the primary volume into three sectors differing in their direction, introduction conditions and the character of the core sand flow. As the compaction measure the apparent sand density was assumed. The density was determined in five measuring points in case of uniform cores, and in three measuring points in case of cores obtained in the core box with three separated sectors. The apparent density of the compacted core sand in the core box cavity was determined on the basis of the measurements of masses and volumes of samples cut-out from the determined core places by means of the measuring probe. Investigations were performed at three values of the working pressure equal 0.4, 0.5 and 0.6MPa for two diameters of the shooting hole: 10 and 20 mm. During tests the core box deaeration, controlled by an activisation of the determined number of deaerating vents placed in the core box, was also subjected to changes.
Źródło:: Archives of Foundry Engineering; 2018, 18, 2; 191-197
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Investigations of the quality of the reclaim of spent moulding sands with organic binders
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/380260.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: regeneracja
masa formierska
powstawanie gazu
reclamation
moulding sand
moulding sand examinations
gas formation
Opis:: Modern investigation methods and equipment for the quality estimation of the moulding sands matrices with organic binders, in their circulation process, are presented in the paper. These methods, utilising the special equipment combined with the authors investigation methods developed in the Faculty of Foundry Engineering, AGH the University of Science and Technology, allow for the better estimation of the matrix quality. Moulding sands systems with organic binders require an in-depth approach to factors deciding on the matrix technological suitability as well as on their environmental impact. Into modern methods allowing for the better assessment of the matrix quality belongs the grain size analysis of the reclaimed material performed by means of the laser diffraction and also the estimation of the moulding sand gas evolution rate and identification of the emitted gases and their BTEX group gases content, since they are specially hazardous from the point of view of the Occupational Safety and Health.
Źródło:: Archives of Foundry Engineering; 2012, 12, 3; 13-18
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Idea of the Integrated Recycling System of Used Moulding Sands with Organic Resins
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/381404.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moulding sand
self-setting sand
recycling
reclamation
masa formierska
masa samoutwardzalna
recykling
regeneracja
Opis:: The paper presents the idea of the integrated recycling system of used moulding sands with organic resins. A combination of the method of forecasting averaged ignition loss values treatments in order to obtain its full recycling constitutes the basics of this process. The results of own investigations, allowing to combine ignition loss values of spent moulding sands after casting knocking out with amounts of dusts generated during the mechanical reclamation treatment of such sands, were utilized in the system.
Źródło:: Archives of Foundry Engineering; 2014, 14, 4; 21-26
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Integrated recycling process of matrices of organic moulding sands
Zintegrowany proces recyklingu osnowy organicznych mas formierskich
Autorzy:: Dańko, R.
Powiązania:: https://bibliotekanauki.pl/articles/353661.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: moulding sand
self-setting sand
recycling system
reclamation
masa formierska
masa samoutwardzalna
recykling
regeneracja
Opis:: The idea and experimental verification of assumptions of the integrated recycling process of matrices of uniform self-hardening moulding sands with synthetic resins, leading to obtaining moulding sands matrix of expected quality - is presented in the hereby paper. The basis of the presented process constitutes a combination of the method of forecasting averaged ignition losses of moulding sands after casting and defining the range of necessary matrix reclamation treatments in order to obtain its full recycling. Simultaneously, the empirically determined dependence of dusts amounts emitted during the reclamation process of the matrix from the given spent sand on the ignition loss values (which is the most proper assessment index of the obtained reclaimed material quality) was taken into account. The special experimental stand for investigations of the matrix recycling process was one of the elements of the conceptual approach and verification of its assumptions. The stand was equipped with the system of current on-line control of the purification degree of matrix grains from organic binder remains. The results of own investigations, allowing to combine ignition loss values of spent moulding sands after casting knocking out with amounts of dusts generated during the mechanical reclamation treatment of such sands, were utilized in the system.
W publikacji przedstawiono koncepcję oraz weryfikację doświadczalną założeń zintegrowanego procesu recyklingu osnowy jednolitych samoutwardzalnych mas formierskich z żywicami syntetycznymi, zapewniającego uzyskanie osnowy mas formierskich o oczekiwanej jakości. Podstawę przedstawionego procesu stanowi skojarzenie metody prognozowania autogennych, wywołanych wysoką temperaturą, uśrednionych strat prażenia masy po procesie wykonania odlewu i zdefiniowaniu zakresu dalszej niezbędnej obróbki regeneracyjnej osnowy w celu pełnego jej recyklingu. Równocześnie została uwzględniona empirycznie wyznaczona zalezność ilości pyłów emitowanych w czasie procesu odzysku osnowy z danej masy zużytej od wartości strat prażenia, bądącego najbardziej właściwym wskaznikiem oceny jakości uzyskanego regeneratu. Elementem koncepcji i weryfikacji jej założeń jest realizacja stanowiska doświadczalnego do badań procesu recyklingu osnowy. Stanowisko zostało wyposażonego w system bieżącej kontroli on-line stopnia oczyszczenia ziaren osnowy z pozostałości organicznego spoiwa. W systemie wykorzystano wyniki badań własnych pozwalających na powiązanie wartości strat prażenia w masie zużytej po wybiciu odlewu z ilością generowanych pyłów podczas mechanicznej obróbki regeneracyjnej tej masy.
Źródło:: Archives of Metallurgy and Materials; 2013, 58, 3; 809-812
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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