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1
Content available Mineralogy, chemical composition and leachability of ash from biomass combustion and biomass–coal co-combustion
Wilczyńska-Michalik W., Gasek R., Michalik M., Dańko J., Plaskota T.
Mineralogia
|
2018
|
Vol. 49, iss. 1/4
67--97
EN
Ash samples from biomass combustion or co-combustion with coal were analysed. The aim of this study of ash was to determine its mineral and chemical composition, and the chemical composition of solutions obtained during one-step water extraction. Besides the chemical analysis, X-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectrometry (SEM-EDS) were applied. The mineral and chemical composition of ash samples differ strongly. The content of heavy metals in the ash is generally low, but in some samples the limits of the content of some elements determined for fertilizers or soil amendments are exceeded. The relatively poor correlation between the concentration in leachate and bulk content in ash indicates that numerous elements are present in different forms in the studied samples. The results indicate that the potential use of biomass ash, or ash from biomass–coal co-combustion, requires complex studies that explore ash and leachates.
2
Content available Thermal Utilization of the Post Reclamation Dust from Molding Sand with Furan Resin in Test Unit
Holtzer M., Dańko R., Dańko J.
Archives of Foundry Engineering
|
2018
|
Vol. 18, iss. 4
15--18
EN
Mechanical reclamation process of spent moulding sands generate large amounts dusts containing mainly rubbed spent binding agents and quartz dust. The amounts of post-reclamation dusts, depending of the reclamation system efficiency and reclaim dedusting system, can reach 5-10% in relation to the total reclaimed moulding sand. This dust due to the high content of the organic substances is a threat to the environment and therefore requires the storage on landfills specially adapted for this type of waste. On the other hand, the presence of organic substances causes that these dusts have relatively high energy values that could be used. However, at present there is no coherent, environmentally friendly concept for the management of this type of dust. The paper presents the results of tests of thermal utilization the dusts (as a source of energy) were carried out at AGH University of Science and Technology. Thermal utilization of dusts was carried out in the co-burning with carbon carriers process or in individual burning (Patent PL 227878 B1 and patent application PL - 411 902).
3
Content available Assessment of the Possibility of Using Reclaimed Materials for Making Cores by the Blowing Method
Dańko R., Dańko J., Skrzyński M.
Archives of Foundry Engineering
|
2017
|
Vol. 17, iss. 1
21--26
EN
The cumulative results of investigations of the possibility of using the reclaimed materials after the mechanical, thermal or mechanical-thermal reclamation for making cores by means of the blowing method in the alkaline CO2 technology, are presented in the paper. Three kinds of spent sands: with furfuryl resin, bentonite and alkaline phenolic resin, obtained from the foundry, were subjected to three kinds of reclamation: mechanical, thermal and combined mechanical-thermal, applying for this aim adequate experimental devices. The obtained reclaims were assessed with regard to the degree of the matrix liberation from the determined binding material. Reclaims of moulding sands with binders of the form of resin were assessed with regard to ignition loss values and pH reaction, while reclaims of moulding sands with bentonite with regard to the residual clay content and pH value. In all cases the results of the performed sieve analyses were estimated and the average characteristic diameter dl was determined. The reclaimed matrix was applied as a full substitute of the fresh high-silica sand in typical procedures of preparing core sands used for making shaped samples for bending strength investigations, Rgu.
4
Content available Problematyka badawcza maszyn i wyposażenia do technologii odlewniczych
Dańko J.
Prace Instytutu Odlewnictwa
|
2016
|
Vol. 56, no. 3
157--173
PL
Artykuł dotyczy problematyki badawczej maszyn i wyposażenia do technologii odlewniczych z uwzględnieniem tematyki badań prowadzonych w Polsce w drugiej połowie ubiegłego wieku w głównych ośrodkach uniwersyteckich kraju oraz w Instytucie Odlewnictwa. Dokonano charakterystyki ogólnej tematyki badań, ze wskazaniem efektów, które stymulowały intensywny wówczas rozwój polskiego odlewnictwa, którego wyposażenie stanowiły maszyny odlewnicze i wyposażenie technologiczne produkowane w kraju. Poddano analizie niektóre aspekty stanu polskiego odlewnictwa ze wskazaniem czynników ograniczających rozwój i produktywność małych oraz średnich przedsiębiorstw odlewniczych, dominujących w krajowym odlewnictwie. Na tle syntezy wcześniejszych badań krajowych oraz stopnia zaawansowania badań oraz wdrożeń technologii odlewniczych do przemysłu w przodujących krajach zachodnich, wskazano na potrzebę rozwoju produkcji nowych generacji maszyn i wyposażenia w celu pewnego uniezależnienia krajowych przedsiębiorstw w dostępie do wiedzy służącej zwiększeniu wydajności i poprawie jakości produkcji odlewniczej. Przedstawiono przykładowe badania w zakresie naukowego wspomagania modernizacji maszynowego wyposażenia odlewni prowadzone na Wydziale Odlewnictwa w Akademii Górniczo-Hutniczej.
EN
The article discusses the research problematics of machines and equipment for casting technologies, with the consideration of the scope of research performed in Poland in the second half of the twentieth century at main domestic university facilities as well as at the Foundry Research Institute in Kraków. General characteristics of the research were performed, with the determination of the effects stimulating the, then, intensive development of the Polish foundry, whose equipment was constituted by domestically produced casting machines and technological apparatus. An analysis was conducted of selected aspects of the condition of the Polish foundry, with the indication of the factors limiting the development and productivity of small and medium casting enterprises, which dominate in the domestic foundry industry. Against the background synthesis of earlier domestic research and the advancement of investigations and technological implementations into the industry in leading Western countries, the need for developing the production of new generation machines and equipment was pointed out, with the purpose to autonomize the domestic enterprises in respect of access to the knowledge aimed at improving efficiency and quality of the casting production. Exemplary investigations were presented, in the scope of a scientific aid in modernizing the foundry machine equipment, conducted at the Faculty of Foundry Engineering of AGH University of Science and Technology in Kraków.
5
Content available Determination of the Surface and Volume Porosity, on the Basis of the Main Fraction of the Polifractional Matrix of Moulding and Core Sands
Dańko R., Dańko J.
Archives of Foundry Engineering
|
2016
|
Vol. 16, iss. 4
191--195
EN
The aim of the hereby paper is to present the developed model of determining the volume and surface porosity based on the main fraction of polifractional materials, its experimental verification and utilisation for the interpretation of effects accompanying the formation of a moulding sand apparent density, porosity and permeability in the blowing processes of the core and moulds technology.
6
Content available Investigations of Physicochemical Properties and Thermal Utilisation of Dusts Generated in the Mechanical Reclamation Process of Spent Moulding Sands
Dańko R., Holtzer M., Dańko J.
Archives of Metallurgy and Materials
|
2015
|
Vol. 60, iss. 1
313--318
EN
The after reclamation dusts originated from various foundry plants, applying moulding sands with organic binding agents, mostly resins, are characterised by different properties in dependence of the used binders, reclamation systems, spent sands overheating degree and the efficiency of the system dedusting the reclaimed material operating in individual foundry plants. In the article the results of investigations of physicochemical properties and thermal utilisation possibility referring to six kinds of after reclamation dusts generated in the mechanical reclamation process of spent moulding sands with furfuryl resins and six other kinds of after reclamation dusts obtained from reclamation process of spent moulding sands with alkaline resins have been presented. All tested dusts originated from various Polish foundry plants of cast iron and cast steel applying the mechanical reclamation process of moulding sands with resins, obtained from different producers.
PL
W artykule przedstawiono charakterystykę pyłów powstających w procesie regeneracji mechanicznej mas zużytych ze spoiwami organicznymi, głównie żywicami. W badaniach uwzględniono rodzaj użytego spoiwa, system regeneracji, stopień przepalenia masy formierskiej oraz skuteczność systemu odpylania systemu regeneracji zainstalowanego w instalacjach przemysłowych. Badaniu poddano właściwości fizykochemiczne oraz możliwości utylizacji termicznej sześciu rodzajów pyłów poregene-racyjnych powstających w procesie regeneracji mechanicznej mas zużytych z żywicą furfurylową oraz sześciu rodzajów pyłów powstających w procesie regeneracji mechanicznej mas zużytych z żywicą alkaliczną. Wszystkie pyły poddane badaniom pochodziły z krajowych odlewni żeliwa i staliwa stosujących technologię mas samoutwardzalnych z żywicami pochodzącymi od różnych producentów, w których stosowana jest mechaniczna regeneracja mas zużytych.
7
Content available Utilisation of Products of the Thermal Reclamation of Post Reclamation Dusts in the Production Technology of Ceramic Building Materials
Holtzer M., Dańko R., Dańko J., Pytel Z.
Archives of Foundry Engineering
|
2015
|
Vol. 15, iss. 4
33--36
EN
The problem related to the management of post reclamation dusts generated in the reclamation process of waste moulding sands with organic binders is presented in the hereby paper. Waste materials generated in this process are products hazardous for the environment and should be utilised. The prototype stand for the utilisation of this dangerous material in its co-burning with coal was developed and patented in AGH in Krakow. The stand was installed in one of the domestic casting houses. As the utilisation result the transformed waste product is obtained and its management in the production of ceramic materials constitutes the subject of the presented publication.
8
Content available Used Furan Sand Reclamation in REGMAS Vibratory Unit
Dańko J., Dańko R., Skrzyński M.
Archives of Foundry Engineering
|
2015
|
Vol. 15, iss. 3
25--28
EN
The paper, especially dealt with problems of reclamation of used furan sand, carried out in new, vibratory sand reclamation unit REGMAS developed by researches from AGH-University of Science and Technology, Faculty of Foundry Engineering in Cracow (Poland). Functional characteristics of reclamation unit as well as the results of reclamation of used sand with furfuryl resin are discussed in the paper. The quality of reclaim was tested by means of the LOI and pH value, dust content in the reclaim and at least by the the quality of the castings produced in moulds prepared with the use of reclaimed matrix.
9
Content available Experiments on the Model Testing of the 2nd Phase of Die Casting Process Compared with the Results of Numerical Simulation
Dańko R., Dańko J., Stojek J.
Archives of Foundry Engineering
|
2015
|
Vol. 15, iss. 4
21--24
EN
Experiments of filling the model moulds cavity of various inner shapes inserted in rectangular cavity of the casting die (dimensions: 280 mm (height) x 190 mm (width) x 10 mm (depth) by applying model liquids of various density and viscosity are presented in the paper. Influence of die venting as well as inlet system area and inlet velocity on the volumetric rate of filling of the model liquid – achieved by means of filming the process in the system of a cold-chamber casting die was tested. Experiments compared with the results of simulation performed by means of the calculation module Novacast (Novaflow&Solid) for the selected various casting conditions – are also presented in the paper.
10
Content available Badania regeneracji termiczno-mechanicznej mieszaniny mas zużytych typu organicznego i nieorganicznego
Dańko R., Łucarz M., Dańko J.
Archives of Foundry Engineering
|
2015
|
Vol. 15, iss. 4 spec.
15--18
PL
Celem przeprowadzonych badań było określenie możliwości regeneracji mieszaniny zużytych mas rdzeniowych pochodzących z procesów warm-box i technologii piasków otaczanych (Croninga), z dodatkiem zużytej masy klasycznej z bentonitem. Ze względu na rodzaj badanych mas zużytych poddano je regeneracji kombinowanej termiczno-mechanicznej, z wykorzystaniem stanowisk doświadczalnych zainstalowanych w Hali Maszyn Odlewniczych Wydziału Odlewnictwa AGH. Efekt regeneracji określany był poprzez badanie straty prażenia uzyskanego regeneratu, morfologii powierzchni ziaren oraz wytrzymałości na zginanie próbek mas formierskich, wykonanych z masy na osnowie regeneratu zagęszczanej metodą nadmuchiwania na stanowisku doświadczalnym PS-1 w technologii warm-box, po czasie odstawania próbek wynoszącym 1h.
EN
The aim of the study was to determine the possibility of reclamation of used core sands mixtures originated from the processes of warm-box and croning with the addition of the classical sand with bentonite. Due to the nature of studied sands combined thermal and mechanical regeneration was performed, with the use of experimental stands installed at the Foundry Engineering Faculty of AGH University of Science and Technology. The effects of reclamatiom process were determined by studying the loss on ignition of the reclaim, as well as the particle surface morphology and a bending strength of samples prepared according to warm-box core molding sands technology, performed using the laboratory PS-1 blower.
11
Content available Regeneracja mechaniczna i mechaniczno-termiczna zużytej masy rdzeniowej z procesu cold-box
Dańko R., Łucarz M., Dańko J.
Archives of Foundry Engineering
|
2014
|
Vol. 14, iss. 4 spec.
21--24
PL
W artykule przedstawiono wyniki badań regeneracji zużytej masy rdzeniowej pochodzącej z procesu cold-box. Badaniom poddano masy zużyte składające się głównie z niedopuszczonych do produkcji uszkodzonych rdzeni. Rdzenie te, nie podlegały destrukcji termicznej w formie, stąd ich dalsza obróbka mająca na celu odzyskanie osnowy kwarcowej wymagała zastosowania specjalnych technik pozwalających na efektywne oczyszczenie ziaren piasku z otoczki zużytego materiału wiążącego. W tym celu stosowano kombinację regeneracji mechanicznej o narastającym czasie obróbki w połączeniu z regeneracją termiczną. Odzyskane regeneraty były następnie poddane badaniom mającym na celu określenie ich stopnia oczyszczenia. Spośród znanych metod oceny instrumentalnej regeneratu w badaniach określano wartości: straty prażenia, odczynu pH, składu ziarnowego (analiza sitowa). Jako sprawdzian jakości regeneratu zastosowano badanie wytrzymałości na zginanie mas rdzeniowych sporządzonych na zregenerowanej osnowie.
EN
The paper presents the results of the regeneration of the spent core sand from cold-box process. The study concerned the reclamation treatment of foundry cores which was not allowed to production process due to their not permissible defects. These cores as a compacted core sand which not been subjected to thermal destruction in the mould had fully preserved their previous characteristic eg. strength, shape and volume hardening. In this case regeneration aimed at recovering the quartz matrix requires the use of special techniques to clean the grains of sand from the used binding material. To solve this problem the special preparing of used cores were applied ensuring the proper grain size composition subjected to dedusting prior to reclamation treatment. Both the mechanical and mechanical-thermal methods of regeneration were tested during research. The recovered the quartz matrix was evalutated by following of well known instrumental tests: loss on ignition, pH value, sieve analysis, dust content. Furthermore reclaim was used to prepare core sand and to perform test bending strength tests.
12
Content available Reclamation of the Inorganic Spent Sand from the Warm-Box Technology in the REGMAS Reclaimer
Dańko R., Dańko J., Skrzyński M.
Archives of Foundry Engineering
|
2014
|
Vol. 14, iss. 1 spec.
23--26
EN
The results of investigations of the reclamation of spent inorganic moulding sands from the warm-box technology are presented in the paper. The reclamation was performed in the prototype vibratory reclaimer: REGMAS. Water-glass with some organic additions influencing its knocking out properties was the binder of this spent sand. The following indices were applied for the reclaimability assessment: ignition loss, Na2O content, dusts amounts generated in the reclamation process, pH value of the reclaim as well as strength of moulding sands prepared with the reclaimed material, with the fresh sand and with the mixture: fresh sand-reclaim.
13
Content available Influence of the Reclaim from the Cordis Technology on the Core Sand Strength
Dańko J., Dańko R., Skrzyński M., Dereń M., Zygmunt Ł
Archives of Foundry Engineering
|
2014
|
Vol. 14, iss. 4
17--20
EN
The investigation results of the mechanical reclamation of spent moulding sands from the Cordis technology are presented in the paper. The quality assessment of the obtained reclaim and the influence of the reclaim fraction in a matrix on the core sand strength is given. The reclaim quality assessment was performed on the basis of the determination of losses on ignition, Na2O content on reclaim grains and pH values. The reclaim constituted 100%, 75% and 50% of the core sand matrix, for which the bending strength was determined. The matrix reclamation treatment was performed in the experimental rotor reclaimer RD-6. Spent sands were applied in as-delivered condition and after the heating to a temperature of 140 oC. Shaped samples for strength tests were made by shooting and hardening of sands in the warmbox technology.
14
Content available Core Blowing Process - Assessment of Core Sands Properties and Preliminary Model Testing
Dańko R., Dańko J., Burbelko A., Skrzyński M.
Archives of Foundry Engineering
|
2014
|
Vol. 14, iss. 1
25--28
EN
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.
15
Regeneracja masy zużytej w regeneratorze wibracyjnym REGMAS 1,5
Dańko R., Dańko J., Holtzer M., Skrzyński M.
Przegląd Odlewnictwa
|
2013
|
Vol. 63, nr 1-2
36-40
PL
W artykule przedstawiono zagadnienia związane z pracami naukowych i badawczymi związanymi z rezultatami procesu regeneracji masy zużytej z żywicą organiczną, prowadzonego w nowym regeneratorze wibracyjnym REGMAS 1,5 opracowanym przez pracowników naukowych Wydziału Odlewnictwa AGH w ramach projektu POIG pt." Wykorzystanie nowoczesnych technologii regeneracji zużytych mas formierskich do opracowania koncepcji i wykonania innowacyjnego regeneratora wibracyjnego" [1]. Charakterystyka projektu oraz urządzenia została przedstawiona w Przeglądzie Odlewnictwa [2] oraz w materiałach konferencyjnych [3-5], jak również urządzenie było prezentowane podczas XVIII Międzynarodowych Targów Technologii dla Odlewnictwa METAL, gdzie zostało nagrodzone medalem. Rozwiązanie prezentowanego regeneratora wibracyjnego jest chronione zgłoszeniem patentowym [6]. Regenerator REGMAS 1.5 jest propozycją Wydziału Odlewnictwa AGH dla małych i średnich odlewni poszukujących właściwego dla ich zakładu urządzenia do regeneracji.
EN
Problems related to scientific and research works concerning the results of reclamation of spent moulding sand with organic binders carried out in the new vibratory reclaimer REGMAS 1,5 developed by the scientists of the Faculty of Foundry Engineering AGH University of Science and Technology, are presented in the paper. This reclaimer was developed within the project: POIG entitled: 'Utilisation of modern technologies of the reclamation of spent moulding sands for the development of the concept and preparation of the innovatory vibratory reclaimer' [1]. The project and device characteristics was presented in the Foundry Journal [2] and in Conference Proceedings [3-5]. The device was also presented during the XVIII International Fairs of Technology for Foundry Practice METAL, where it was awarded the medal. The solution of the presented vibratory reclaimer is protected by the patent application [6]. The reclaimer REGMAS 1.5 is the proposition of the Faculty for Foundry Engineering, AGH, for small and medium foundry plants which are looking for the proper reclaiming device.
16
Content available Reclamation of spent moulding sands with inorganic binders in the vibratory reclaimer REGMAS
Dańko J., Kamińska J., Skrzyński M.
Archives of Metallurgy and Materials
|
2013
|
Vol. 58, iss. 3
993--996
EN
The results of the reclamation of spent moulding sands with inorganic binder in the prototype vibratory reclaimer REGMAS - are presented in the paper. Spent moulding sands with modified water-glass, burned as well as not burned, present in a form of agglomerates (lumps), were subjected to the reclamation processes. During individual reclamation cycles the reclaimer efficiency and vibrations amplitudes were determined and physicalchemical and strength investigations were performed for the obtained reclaim materials. The obtained reclaim was used as a component of the matrix of moulding sands with water-glass in the Floster S technology, in which the reclaim constituted 100%, 80% and 50% of the sand matrix - respectively.
PL
W artykule przedstawiono wyniki regeneracji zużytej masy formierskiej ze spoiwem nieorganicznym w prototypowym regeneratorze wibracyjnym REGMAS. Procesowi regeneracji poddano zarówno masę zużytą ze szkłem wodnym modyfikowanym przepaloną oraz nieprzepaloną masę zużytą występującą w postaci brył. W trakcie realizacji poszczególnych cykli regeneracji określano wydajność regeneratora oraz amplitudę wibracji, dla których przeprowadzono badania fizykochemiczne oraz wytrzymałościowe otrzymanych regeneratów. Wykonano następujące badania: zawartość pyłów w regeneracie UK , analizę sitową osnowy oraz laserową analizę granulometryczną oddzielonych pyłów, odczyn pH, stratę prażenia oraz zawartość Na2O regeneratu. Uzyskany regenerat użyto jako składnik osnowy mas formierskich ze szkłem wodnym w technologii floster S, w których stanowił odpowiednio 100%, 80% oraz 50% osnowy piaskowej.
17
Content available Quantitative and qualitative methods for evaluation of measurement signals on the example of vibration signals analysis from the corps of prototype reclaimer regmas
Kowal J., Dańko J., Stojek J.
Archives of Metallurgy and Materials
|
2013
|
Vol. 58, iss. 3
827--831
EN
The article presents examples of vibration signals analysis derived from the research of prototype reclaimer REGMAS. After the division of the time-frequency analysis methods of measuring signals, their non-parametric and parametric models were estimated. At the end of the article the summary and conclusions were set.
PL
W artykule zaprezentowano przykłady analizy sygnałów wibracji uzyskanych z badań prototypowego regeneratora mas formierskich REGMAS. Po dokonaniu podziału czasowo-częstotliwościowych metod analizy sygnałów pomiarowych, wyznaczono ich modele parametryczne i nieparametryczne. Na końcu zawarto podsumowanie oraz wnioski końcowe dotyczące przedstawionych analiz.
18
Content available Granulation of after reclamation dusts from the mixed sands technology: water glass – resolit
Kamińska J., Dańko J.
Archives of Foundry Engineering
|
2013
|
Vol. 13, iss. 2
65--70
EN
A technology of sands with water glass hardened by liquid esters is a cheap and ecologic method of producing moulding sands. Due to these advantages, this technology is still very important in several foundry plants for production of heavy iron and steel castings. Reclamation of the mixed moulding and core sands generates significant amounts of dusts, which require further treatments for their reuse. The results of investigations of a pressureless granulation of dusts generated in the dry mechanical reclamation process of the mixture consisting in app. 90% of moulding sands from the Floster S technology and in 10% of core sands with phenolic resin resol type, are presented in the hereby paper. Investigations were aimed at obtaining granulates of the determined dimensional and strength parameters. Granules were formed from the mixture of dusts consisting of 75 mass% of dusts after the reclamation of sands mixture and of 25 mass% of dusts from bentonite sands processing plant. Wetted dusts from bentonite sands were used as a binding agent allowing the granulation of after reclamation dusts originated from the mixed sands technology.
PL
Technologia mas ze szkłem wodnym utwardzanym ciekłymi estrami jest tanią i bardzo ekologiczną metoda wytwarzania mas formierskich. Z uwagi na te zalety technologia ta ma nadal duże znaczenie w wielu odlewniach do wykonywania form dla produkcji ciężkich odlewów żeliwnych i staliwnych. Regeneracja mieszaniny masy formierskiej oraz mas rdzeniowych tworzy znaczne ilości pyłów poregeneracyjnych, które wymagają dalszej obróbki w celu ponownego ich zagospodarowania. W pracy przedstawiono wyniki badań procesu bezciśnieniowej granulacji pyłów generowanych w procesie suchej regeneracji mechanicznej mieszaniny mas zużytych składających się w około 90% z masy formierskiej z technologii Floster S oraz 10% z masy rdzeniowej z żywicą fenolową typu rezolowego. Badania miały na celu wytworzenie granulatu o określonych parametrach wymiarowych i wytrzymałościowych. Granule tworzono z mieszaniny pyłów składającej się w 75% mas. z pyłów uzyskanych po regeneracji mieszaniny mas oraz w 25% mas. z pyłów z masy z bentonitem. Nawilżony pył z masy bentonitowej został użyty jako spoiwo umożliwiające granulowanie się pyłów poregeneracyjnych z technologii mas mieszanych.
19
Content available Conceptual Design of a Core Making System
Asłanowicz M., Dańko J., Dańko R., Fedoryszyn A., Fulko T.
Archives of Foundry Engineering
|
2013
|
Vol. 13, iss. 1 spec.
13--16
EN
The paper presents the topics related with the production of small and medium-sized cores by means of blowing methods. The basic information concerning the manufacturers of the blowing machines and the general characteristics of machines offered by them are presented. The basic design of blowing machines are presented with discussions of the theoretical works of Boenisch, Axionov and J. Dańko determining important from the technology point of view sand and air flow parameters including different methods of core box filling factors and the factor eV representing the sand ability to evacuate from the shooting chamber.
20
Content available Characteristic of core manufacturing process with use of sand, bonded by ecological friendly nonorganic binders
Fedoryszyn A., Dańko J., Dańko R., Asłanowicz M., Fulko T., Ościłowski A.
Archives of Foundry Engineering
|
2013
|
Vol. 13, iss. 3
19--24
EN
Mechanization of the process of core making with the use of inorganic and organic binders is based, almost solely, on core blowing machines. Presently the core blowing machines are equipped with tools and devices that allow for application of different technologies of core making. Cold-box, hot-box and warm-air technologies require that core blowing machines shall be additionally equipped with either core-box pre-heating system or gas purging and neutralization system, or hot air purging systems. Considering the possibility of using varied, the most advantageous technologies of core making, the production of universal core blowing machines equipped with replaceable devices has been undertaken in Poland. The universal core blowing systems allow for mechanization of core making process also with the use of sand, bonded by modern, eco-friendly binder systems. The paper presents selected results-based evaluation of core blowing process showing the scope of conducted design and implementation works.
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