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1
Projektowanie zabezpieczania zabytkowych wyrobisk chodnikowych na przykładzie wyrobisk, zlokalizowanych na poziomie I Kopalni Soli „Wieliczka”
Bodlak M., Gradecki D., Kucharz J., Malik J.
Cuprum : czasopismo naukowo-techniczne górnictwa rud
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2018
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nr 2
15--39
PL
W związku z postępującym poszerzaniem się zakresu udostępnienia podziemnych, zabytkowych wyrobisk, w tym najstarszych z początku istnienia kopalni, zlokalizowanych na poziomie I Kopalni Soli „Wieliczka”, pojawia się potrzeba rewitalizacji głównych wyrobisk korytarzowych. Zabiegi te są konieczne z uwagi na zapewnienie bezpiecznej komunikacji, udostępnienia i przewietrzania zabytkowych komór, zlokalizowanych w ich otoczeniu. Wobec powyższego zarząd kopalni podjął stosowne działania, zlecając opracowanie dokumentacji technicznych przebudowy najistotniejszych wyrobisk korytarzowych na poziomie I kopalni. W artykule zawarto analizę uwarunkowań geologiczno-górniczych, krótką kwerendę historyczną, opis walorów historyczno-górniczych oraz procesu projektowania przebudowy wybranych wyrobisk na poziomie I Kopalni Soli „Wieliczka” S.A., wpisanych na listę wyrobisk zabytkowych, w aspekcie konserwatorskim.
EN
In terms of the progressive expansion of the scope of access to underground, historic excavations, including the oldest excavations from the beginning of the mine, located at the first level of the Wieliczka Salt Mine, there is a need to revitalise the maindrifts. These procedures are necessary in order to ensure safe communication, access and ventilation of historic chambers located in their surroundings. In view of the above, the mine management has taken appropriate actions consisting of order the preparation technical documentation of the reconstruction of the most important drifts at the first level of the mine.
2
Content available Increasing of Utility Properties of Grey Cast Iron Castings with Heat Treatment
Eperješi Š., Malik J., Vasková I., Fecko D.
Archives of Foundry Engineering
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2015
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Vol. 15, iss. 2
13--16
EN
Grey cast iron belongs to materials for casting production, which have wide application for different industry branches. Wide spectrum of properties of these materials is given by the structure of base metal matrix, which can be influenced with heat treatment. Processes of annealing can be applied for grey cast iron without problems. During heat treatment processes, where higher cooling rates are used, the thermal and structural strains become important. Usage and conditions of such heat treatment for grey cast iron castings of common production are the subject of evaluation of this article.
3
Content available Influence of Technological Parameters of Furane Mixtures on Shrinkage Creation in Ductile Cast Iron Castings
Vasková I., Hrubovčáková M., Eperješi Š., Malik J.
Archives of Metallurgy and Materials
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2014
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Vol. 59, iss. 3
1037--1040
EN
Ductile cast iron (GS) has noticed great development in last decades and its boom has no analogue in history humankind. Ductile iron has broaden the use of castings from cast iron into areas, which where exclusively domains for steel castings. Mainly by castings, which weight is very high, is the propensity to shrinkage creation even higher. Shrinkage creation influences mainly material, construction of casting, gating system and mould. Therefore, the main realized experiment was to ascertain the influence of technological parameters of furane mixture on shrinkage creation in castings from ductile iron. Together was poured 12 testing items in 3 moulds forto determine and compare the impact of various technological parameters forms the propensity for shrinkage in the casting of LGG.
PL
W ostatnich latach obserwuje sie intensywny wzrost produkcji odlewów z żeliwa sferoidalnego. Dotyczy to także zastępowania tym tworzywem odlewów staliwnych. W przypadku masywnych odlewów szczególnie duże znaczenie odgrywa przebieg skurczu tworzywa. Powstawanie skurczu wiąże się z materiałem odlewu, jego konstrukcja, układem wlewowym oraz materiałem formy. Celem badan zaprezentowanych w artykule jest ocena wpływu właściwości technologicznych formy na podstawie skurczu. Odlano 12 kształtek w 3 formach, aby ocenić wpływ jakości formy na skurcz odlewów z żeliwa sferoidalnego.
4
Content available The dependence of castings quality produced in clay moulding mixtures from the properties of binder based on a montmorillonite
Vasková I., Fecko D., Malik J.
Archives of Foundry Engineering
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2012
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Vol. 12, iss. 3
123-128
EN
Casting quality depends on many factors including the quality of the input materials, technology, material securing and last but not least, the mould into which the casting is casted. By pouring into a single-shot mould, based mainly on 1st generation binders, is is a very important factor. Basically, a bentonite mixture represents either a three- or four-component system, but each component of the system is a heterogeneous substance. This heterogeneity punctuates mainly a non-stationary heat field, presented throughout the whole process of the casting production. The most important component is a binder and in the case of first generation binders mostly bentonites are used - clays that contain minimum of 80% of montmorillonite.
5
Content available Homogenity of die casting and returning material
Malik J., Vasková I., Fecko D., Futáš P.
Archives of Foundry Engineering
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2012
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Vol. 12, iss. 2
61-64
EN
Homogeneity of die castings is influenced by wide range of technological parameters as piston velocity in filling chamber of die casting machine, filling time of mould cavity, temperature of cast alloy, temperature of the mould, temperature of filling chamber, surface pressure on alloy during mould filling, final pressure and others. Based on stated parameters it is clear, that main parameters of die casting are filling time of die mould cavity and velocity of the melt in the ingates. Filling time must ensure the complete filling of the mould cavity before solidification process can negatively influence it. Among technological parameters also belong the returning material, which ratio in charge must be constrained according to requirement on final homogeneity of die castings. With the ratio of returning material influenced are the mechanical properties of castings, innerhomogeneity and chemical composition.
6
Content available remote The influence of the tablet height and final pressure on the final quality of the casting
Malik J., Eperješi Ľ., Fecko D., Gašpar Š.
Archives of Foundry Engineering
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2011
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Vol. 11, iss. 1s
37-40
EN
The technology of die casting is in the connection of final quality of produced castings influenced by a lot of technological factors. These factors influence each other. This represents the complex reciprocal connections between the character of alloy, mould cavity filling time, construction of a mould and the efficiency of die cast machine. Between technological factors influencing the quality of casting belong the final pressure and the height of the tablet in the filling chamber. The final pressure should replace the gravity feeding of the molten metal into empty spaces of the casting and inhibit the clustering of bubbles, the tablet height eliminates the air amount enclosed in casting after pressing.
7
Content available remote Comparison of achieved parameters results of high-strength ductile cast iron by different way of heat treatment
Eperješi Š., Malik J., Vasková I., Eperješi Ľ., Fecko D.
Archives of Foundry Engineering
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2011
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Vol. 11, iss. 1s
55-57
EN
Because of assecuration of requirements for commercial production of ductile cast iron castings were provided the tests of heat treatment of these castings for achieving the desired strength, hardness and ductility. High-strength cast iron can be assured by heat treatment - isothermal refinement or hardening with tempering. Achieved results shown the way of realization this kind of heat treatment and its utilization in practical conditions.
8
Content available remote Physical and chemical clay binder characteristics from various locality and their influence on some technological properties of bentonite mouling mixtures
Vasková I., Fecko D., Malik J., Futáš P.
Archives of Foundry Engineering
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2010
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Vol. 10, iss. 1 spec.
211--216
EN
The aim of this paper is to explore the complex physical – chemical characteristics of bentonite of slovak provenance and to compare with non-slovak, which is considered as European highest quality standard in foundry and to compare from the point of foundry application. These characteristics of raw material have direct relationship with technological properties of bentonite sand mixtures and mainly with the quality of castings poured into these mixtures. To compare technological properties of bentonite forming mixtures with use of various clay types point of view application in foundry industry.
9
Content available remote Tests of moulding mixture by using various clay binder granularity
Vasková I., Malik J., Futáš P.
Archives of Foundry Engineering
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2009
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Vol. 9, iss. 1
29-32
EN
Bentonite as foundry binder has dominant and important significance in Slovak and Czech foundries. Present - day wide world produce of casts is estimated to 80 mil ton. There are about 60-70% casts into bentonite moulding mixtures. We say about mixture of first binder generation where join is results of capillary pressure force and Van der Waals force (forming mixture on the base of bentonite binder). European initions of this technology be included in thirties last century. This technology will have dominant position in spite of formation and development of new manufacturing processes in future. There are these advantages of using moulding mixture on the bentonite base: high value of compression strength and plasticity of this binder is achieved at low content of surface moisture - this fact makes it possible to pour by technology of raw clay, relatively low costs by up to raw material, Cca 95 - 98% repeated usage of moulding mixture, high productivity of used production engineering, high quality of casts (quality surface, uniform accurance, casts without defects) is assured by modern way of ramming, hygienic and ecological advantage.
10
Content available remote Kanały blokowe Krakowa w ujęciu historycznym i obecnie
Czapliński T., Malik J., Dąbrowski W.
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
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2008
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nr 6 wyd. spec.
film5
11
Content available remote Experience in forming and core mixtures by AlpHhaset technology
Vasková I., Smolková M., Malik J., Eperješi Š.
Archives of Foundry Engineering
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2008
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Vol. 8, iss. 2
141-144
EN
Chemically bound mixtures have had the evolution effect upon the economical and quality aspects of the foundry operations since they presentation at the market. The higher output and significantly increased production efficiency of moulds and cores has lead to the material increase in the quality and profit of the foundries. It can be seen that in last several years the knowledge of bounds based on the organic resins has made enormous advances. The higher strength, improved properties under elevated temperatures, the reduction of the environmental impacts of the organic bounds and at the same their highly improved regenerationability ensure that these systems will be still more significant binding system. The organic binding systems are predominantly being developed recemtly. The technology AlpHaset is ranked among the alkali binding systems. This technology has certain disadvantages - lower strength, speed of hardening- which have been gradually eliminated.
12
Content available Kanały blokowe Krakowa w ujęciu historycznym i obecnie
Czapliński T., Malik J., Dąbrowski W.
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
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2007
|
T. 3 spec. ed.
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