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Wyszukujesz frazę "core blowing" wg kryterium: Temat


Wyświetlanie 1-9 z 9
Tytuł:
Examinations of parameters influencing the outflow of two phase air-sand stream from machine chamber and core box filling in shooting process
Badania parametrów wpływających na wypływ dwufazowego strumienia piaskowo-powietrznego z komory nabojowej i wypełnienie rdzennicy w procesie dmuchowym
Autorzy:
Fedoryszyn, A.
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/356971.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core production
core shooting
core blowing
rdzennice
strzelarka
nadmuchiwarka
Opis:
The study investigates the key aspects involved in the flow of the air-sand stream from the machine chamber and in the core box filling in the core shooting and core blowing processes. The prevailing tendency to manufacture thin-walled castings with intricate channel structures has become the major determinant of castings quality and production rates. An important parameter of most core sand used in the shooting processes is the ability to eject from the machine chamber and the core-box filling capability. These properties are the key factors determining the feasibility of manufacturing intricate cores and the process efficiency. The research work outlined in this study focuses on establishing the performance criteria of core sand ejection from the machine chamber and of core box filling and sand compaction. The results given below were obtained for several new-generation core sand types, containing organic and inorganic binders, and designed to be used in hot-box, warm box and warm air processes.
W publikacji przedstawiono zagadnienia związane z wypływem strumienia piaskowo-powietrznego z komory nabojowej i zapełnianiem rdzennicy metodami dmuchowymi z wykorzystaniem strzelarek i nadmuchiwarek. Tendencja do konstrukcji odlewów o coraz cieńszych ściankach i skomplikowanych kanałach, sprawia, że produkcja wysokiej jakości rdzeni jest nadal czynnikiem determinujacym jakość oraz wydajność produkcji odlewów. Ważnymi właściwościami ogółu mas rdzeniowych stosowanych w procesach dmuchowych jest ewakuacja masy z komory nabojowej maszyny dmuchowej oraz zdolność do zapełniania i zagęszczania masy w rdzennicy. Właściwości te, decydują często o możliwosci wykonania skomplikowanych rdzeni oraz o efektywności procesu technologicznego. Przedstawione badania dotyczą ustalenia kryteriów oceny ewakuacji masy z komory nabojowej oraz zdolność do wypełniania rdzennicy i zagęszczania kilku nowoczesnych mas formierskich, zarówno organicznych jak i nieorganicznych, pochodzących technologii hot box, warm box, warm air.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 3; 903-906
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method
Autorzy:
Dańko, R.
Jamrozowicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/106993.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
core shooting
core blowing
molding sand
resin migration
Opis:
Resin migration in a core can occur during the core production process performed by blowing methods in which the core sand is transported into the core box as a two-phase sand-air flux characterized by various working parameters (working pressure, shooting time, volumetric concentration). This migration is the result of the resin being blown off from the matrix grain surfaces by compressed air. The methodology of the investigation of this effect developed at AGH University of Science and Technology is presented in this paper. The results of the resin migration tests obtained for cores made with cold-box technology at various working parameters of the shooting process are also shown.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 3; 70-73
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristic of core manufacturing process with use of sand, bonded by ecological friendly nonorganic binders
Autorzy:
Fedoryszyn, A.
Dańko, J.
Dańko, R.
Asłanowicz, M.
Fulko, T.
Ościłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/947570.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanization of foundry proces
automation of foundry proces
core blowing machine
casting core
inorganic binder
mechanizacja procesu odlewniczego
automatyzacja procesu odlewniczego
maszyna odlewnicza
rdzeń odlewniczy
spoiwo nieorganiczne
Opis:
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.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3; 19-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of the Influence of the Number and Distribution of Vents on the Production Process of Cores by the Blowing Method
Autorzy:
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/352765.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core shooter
core sands
blowing method
Opis:
The results of studies of the cores production by blowing methods with utilising the modified experimental shooting machine SR-3D, are provided in the hereby paper. The core sands from the Cordis technology were applied in the presented investigations. The influence of the number and distribution of vents on the shaped core box filling, filmed by a digital camera, was determined. Investigations were performed for the shooting pressures of 0.4, 0.5 and 0.6 MPa and for three surfaces of the shooting hole, at various numbers and distribution ways of vents in the experimental core box. The selected results of the model investigations were compared with the results of simulations performed previously in the PROCAST programme. The intensity of the core sand outflow from the shooting chamber into the core box of the experimental shooting machine was measured. Technological effects were assessed on the basis of the core sand apparent density in individual parts of the core, in dependence on the character of the pressure increase in the shooting chamber and the pressure value obtained in the core box.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 105-111
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
Aspects of Quality Assurance in Mechanization of Core Making Process
Autorzy:
Asłanowicz, M.
Fedoryszyn, A.
Fulko, T.
Ościłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/380486.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanization of casting processes
automation of casting processes
sand technologies
core shooting
blowing machines
core making process
mechanizacja procesów odlewniczych
automatyzacja procesów odlewniczych
rdzeń wstrzeliwany
wdmuchiwanie
Opis:
The article presents conclusions drawn from analysis and research conducted in domestic foundries concerning currently used core shop equipment as well as determination of their needs within this area. Works within mechanization of core making process, conducted together by Ferro-Masz company, Łódź and Faculty of Foundry Engineering of AGH, Kraków, included analysis of available technologies, applied materials and requirements for mechanization of core making process with the use of blowing methods. Commercial offers from manufacturers of core making systems has been discussed together with presentation of own solution of universal core shooting/blowing machine, ensuring production of high-quality cores.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 43-46
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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