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Tytuł:
Influence of Microwave Heating on the Molding Mass with Gypsum Binder Structure and Strength
Autorzy:
Paduchowicz, P. J.
Granat, K.
Biały, P.
Powiązania:
https://bibliotekanauki.pl/articles/1837825.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
foundry materials
foundry technologies
plaster gypsum
moulding and core sands
strength of masses
odlewnia
materiały odlewnicze
technologie odlewnicze
gips
masy formierskie
wytrzymałość mas formierskich
Opis:
The paper presents results of influence microwave drying on strength and technological properties of molding sand with gypsum binder researches, which, immediately after making and after the natural initial setting in air for 1, 2 or 5 hours, was heated with 250 W microwave power for 3, 6, 9 and 12 min time periods. The test was carried out on a mass containing (% -wt.): 88% Grudzeń-Las quartz sand, 12% "Dolina Nidy" plaster gypsum and 6% water. The loss of moisture content during natural drying and then microwave drying was determined, significant from the point of view of using the mass with gypsum binder in the production of products, using an environmentally friendly technology without casting incompatibilities. Additionally, the compressive strength of the mass was measured. The influence of both drying methods on the binder crystallization process and the associated mass strength was demonstrated, especially in terms of the possibility of selecting parameters and / or intensifying a specific drying method for use in the technology of manufacturing molds and foundry cores.
Źródło:
Archives of Foundry Engineering; 2021, 21, 1; 113-118
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of flowability of the green sand mould by remote control of portable flowability sensor
Autorzy:
Abdulamer, D.
Powiązania:
https://bibliotekanauki.pl/articles/2175737.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
flowability
moulding process
foundry
wireless system
green sand mould
płynność
proces formowania
odlewnia
system bezprzewodowy
Opis:
Purpose: The useful data and information during the sand compaction process steps should be collected. Direct measurement methods of the sand mould properties during the actual moulding process are not adopted yet. Design/methodology/approach: In this work, a remote control system [1] have been integrated into a new flowability sensor [2]. Findings: To overcome the complexity of the tools and equipment that existed in laboratory, and in foundry. Research limitations/implications: In order to investigate, and control behavior of the moulding process of bentonite-bonded green sand process, the sensors have been equipped with the Bluetooth technology for a wireless transmission of the measured data to computers. Originality/value: This technique contributes to improve of the compaction process based on the non-destructive tests, enhances prediction of the optimum parameter conditions, and reduced the energy, and the compaction time consumed for the green sand moulding process.
Źródło:
Archives of Materials Science and Engineering; 2021, 112, 2; 70--76
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on Selected Types of Lustrous Carbon Carriers After the High - Temperature Pyrolysis
Autorzy:
Kamińska, Jadwiga
Stachowicz, M.
Kubecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1837781.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
green moulding sand
lustrous carbon
pyrolysis
core shooting
odlewnia
piasek formierski
węgiel błyszczący
piroliza
Opis:
For research purposes and to demonstrate the differences between materials obtained from the carbonaceous additives to classic green moulding sands, five lustrous carbon carriers available on the market were selected. The following carbonaceous additives were tested: two coal dusts (CD1 and CD2), two hydrocarbon resins (HR1 and HR2) and amorphous graphite (AG1). The studies of products and material effects resulting from the high-temperature pyrolysis of lustrous carbon carriers were focused on determining the tendency to gas evolution, including harmful compounds from the BTEX group (benzene, toluene, ethylbenzene and xylene). Moreover, the content of lustrous carbon (LC), the content of volatile matter and loss on ignition (LOI) of the carbonaceous additives were tested. The solid products formed during high-temperature pyrolysis were used for the quantitative and qualitative evaluation of elemental composition after the exposure to temperatures of 875oC in a protective atmosphere and 950oC in an oxidizing atmosphere. The conducted studies have indicated the necessity to examine the additives to classic green moulding sands, which is of particular importance for the processing, rebonding and storage of waste sand. The studies have also revealed some differences in the quantitative and qualitative composition of elements introduced to classic moulding sands together with the carbonaceous additives that are lustrous carbon carriers. It was also considered necessary to conduct a research on lustrous carbon carriers for their proper and environmentally friendly use in the widely propagated technology of classic green sand system.
Źródło:
Archives of Foundry Engineering; 2021, 21, 1; 56-62
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Hardening Methods on the Moulding Sand’s Properties with Gypsum Binder
Autorzy:
Granat, K.
Paduchowicz, P.
Dziedzic, A.
Jamka, M.
Biały, P.
Powiązania:
https://bibliotekanauki.pl/articles/1840922.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
gypsum binder
foundry masses
core mass
masses properties
odlewnia
spoiwo gipsowe
masy odlewnicze
masa rdzeniowa
właściwości masy
Opis:
The research paper presents the results of testing the strength and technological properties of molding sand with gypsum binder, the bonding process proceeded: naturally or conventionally. The tests included mass containing (parts by weight): 78 pbw. Grudzeń-Las quartz sand, 22 pbw. plaster gypsum "Dolina Nidy” and 9 pbw. water. Measurements of compressive strength, shear, tensile and bending as well as permeability and looseness were carried out on standard cylindrical samples kept in the air for 1-96 hours or dried at 110oC for 1-8 hours. The results of the analysis were analyzed in connection with the mass structure and construction binding bridges warp grains observed with a scanning microscope (SEM). The influence of drying intensity on the bonding process and related mass properties has been demonstrated, especially from the point of view of the possibility of selection and / or intensification of a specific curing method for use in the production of gypsum binger molds and cores.
Źródło:
Archives of Foundry Engineering; 2020, 20, 4; 13-17
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of Poly(Acrylic Acid-co-Maleic Acid) Sodium Salt Intercalated Montmorillonite
Autorzy:
Grabowska, B.
Cukrowicz, S.
Kurleto-Kozioł, Ż.
Kaczmarska, K.
Drożyński, D.
Sitarz, M.
Bobrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/382199.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
hybrid materials
montmorillonite
lustrous carbon
intercalation
odlewnia
materiały hybrydowe
montmorylonit
węgiel
Opis:
The intercalation into interlayer spaces of montmorillonite (MMT), obtained from natural calcium bentonite, was investigated. Modification of MMT was performed by the poly(acrylic acid-co-maleic acid) sodium salt (co-MA/AA). Efficiency of modification of MMT by sodium salt co-MA/AA was assessed by the infrared spectroscopic methods (FTIR), X-ray diffraction method (XRD) and spectrophotometry UV-Vis. It was found, that MMT can be relatively simply modified with omitting the preliminary organofilisation – by introducing hydrogel chains of maleic acid-acrylic acid copolymer in a form of sodium salt into interlayer galleries. A successful intercalation by sodium salt of the above mentioned copolymer was confirmed by the powder X-ray diffraction (shifting the reflex (001) originated from the montmorillonite phase indicating an increase of interlayer distances) as well as by the infrared spectroscopy (occurring of vibrations characteristic for the introduced organic macromolecules). The performed modification causes an increase of the ion exchange ability which allows to assume that the developed hybrid composite: MMT-/maleic acid-acrylic acid copolymer (MMT-co- MA/AA) can find the application as a binding material in the moulding sands technology. In addition, modified montmorillonites indicate an increased ability for ion exchanges at higher temperatures (TG-DTG, UV-Vis). MMT modified by sodium salt of maleic acid-acrylic acid copolymer indicates a significant shifting of the loss of the ion exchange ability in the direction of the higher temperature range (500–700°C).
Źródło:
Archives of Foundry Engineering; 2019, 4; 67-75
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of IT tools in the accident investigation and analysis process based on the example of foundries
Wykorzystanie narzędzi informatycznych w procesie badania i analizy wypadkowości na przykładzie odlewni
Autorzy:
Racek, Elżbieta
Gruszka, Józef
Powiązania:
https://bibliotekanauki.pl/articles/431978.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
accidents at work
industrial foundry
safety
hazards
wypadki przy pracy
odlewnia przemysłowa
bezpieczeństwo
zagrożenia
Opis:
Accidents at work sooner or later affect every enterprise. It is the employer’s responsibility to ensure safe working conditions by determining occupational risk at all workplaces, combating sources of danger, and providing employees with relevant information and instructions. This is one of the effective ways to reduce the number of accidents at work. The purpose of the article is to analyze accidents at work in the period 2014-2018 in a selected foundry enterprise in Wielkopolska. The scope of the article includes a summary of the data from the Central Statistical Office, the characteristics of the enterprise, and the hazards occurring in the foundry process. An analysis and assessment of accident rates at the foundry in the same period were also presented. The assessment was based on accident rates, on the basis of which the work station most vulnerable to accidents was determined.
Wypadki przy pracy prędzej czy później mogą dotknąć każde przedsiębiorstwo. Obowiązkiem pracodawcy jest zapewnienie bezpiecznych warunków pracy przez określenie ryzyka zawodowego na wszystkich stanowiskach pracy, zwalczanie źródeł zagrożeń oraz udzielanie pracownikom odpowiednich informacji i instrukcji. Jest to jeden ze skutecznych sposobów zmniejszenia liczby wypadków przy pracy. Celem poniższego artykułu jest analiza wypadków przy pracy w latach 2014-2018 w wybranym przedsiębiorstwie odlewniczym na terenie Wielkopolski. Zakres artykułu obejmuje podsumowanie danych GUS, charakterystykę przedsiębiorstwa, zagrożenia występujące w procesie odlewniczym. Przedstawiona została również analiza i ocena wskaźników wypadków w odlewni w latach 2014-2018. Oceny dokonano, opierając się na wskaźnikach wypadków. Na tej podstawie określono miejsce pracy, gdzie istnieje największe ryzyko wypadków.
Źródło:
Informatyka Ekonomiczna; 2019, 3 (53); 72-73
1507-3858
Pojawia się w:
Informatyka Ekonomiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Material balance of the technological process in the new foundry of new ferronikel in DRENAS 2017
Autorzy:
Bajraktari-Gashi, Zarife
Halilaj, Behram
Powiązania:
https://bibliotekanauki.pl/articles/101800.pdf
Data publikacji:
2018
Wydawca:
Politechnika Lubelska. Polskie Towarzystwo Promocji Wiedzy
Tematy:
foundry
ore
fuel
calcine
silicate
oxide
odlewnia
ruda
paliwo
prażenie
krzemian
tlenek
Opis:
Experimental and industrial research of the technological process during the year 2017, including planning, is presented in this paper. That research was conducted in the new Foundry of new Ferronickel in Drenas, which is in the village of Cikatove, Drenas, the Republic of Kosovo. According to initial calculations, an amount of ore which would enter the process was determined, however the anticipated amount was different from the one used during the process. The same applies to fuel. Difference between the planned and the actual amount of ore used during the year 2017 resulted from the percentage of Ni in the amount of ore used in the foundry, demand for an Fe-Ni ferroalloy etc. The technological process in the foundry serves the purpose of processing ore of ironnickel with a high percentage of Ni in its composition. The material balance of the technological process in the new Foundry of new Ferronickel in Drenas, presented in this paper, is based on experimental and industrial data of the technological process acquired in the foundry. The material balance includes the technological process starting from calculation of the amount of ore and fuel, both making up the load for the rotary kiln. Additional contributors to the material balance are calculation of the amount of: fuel, which impacts the increase of temperature in rotary kilns, charge for the electric furnaces, metal and slags from the electric furnaces, metal and slags from the refining process (convertors) and mathematical calculation of the final product which is the ferroalloy of Fe-Ni. While preparing the material balance we have noticed greater acquisition of Ni than planned. The greater amount of Ni was produced by a smaller amount of ore than originally planned.
Źródło:
Journal of Technology and Exploitation in Mechanical Engineering; 2018, 4, 1; 29-35
2451-148X
Pojawia się w:
Journal of Technology and Exploitation in Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long-term Effects of Relative Humidity on Properties of Microwave Hardened Moulding Sand with Sodium Silicate
Autorzy:
Stachowicz, M.
Granat, K.
Powiązania:
https://bibliotekanauki.pl/articles/379875.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
sodium silicate
humidity
microwaves
high-silica sand
odlewnia
krzemian sodu
wilgotność
mikrofale
piasek kwarcowy
Opis:
Moulding sands containing sodium silicate (water-glass) belong to the group of porous mixture with low resistance to increased humidity. Thanks to hydrophilic properties of hardened or even overheated binder, possible is application of effective methods of hydrous reclamation consisting in its secondary hydration. For the same reason (hydrophilia of the binder), moulds and foundry cores made of high-silica moulding sands with sodium silicate are susceptible to the action of components of atmospheric air, including the contained steam. This paper presents results of a research on the effect of (relative) humidity on mechanical and technological properties of microwave-hardened moulding mixtures. Specimens of the moulding sand containing 1.5 wt% of sodium water-glass with module 2.5 were subjected, in a laboratory climatic chamber, to long-term action of steam contained in the chamber atmosphere. Concentration of water in atmospheric air was stabilized for 28 days (672 h) according to the relative humidity parameter that was ca. 40%, 60% and 80% at constant temperature 20 °C. In three cycles of the examinations, the specimens were taken out from the chamber every 7 days (168 h) and their mechanical and technological parameters were determined. It was found on the grounds of laboratory measurements that moulds and cores hardened with microwaves are susceptible to action of atmospheric air and presence of water (as steam) intensifies action of the air components on glassy film of sodium silicate. Microwave-hardened moulding sands containing sodium silicate may be stored on a long-term basis in strictly determined atmospheric conditions only, at reduced humidity. In spite of a negative effect of steam contained in the air, the examined moulding mixtures maintain a part of their mechanical and technological properties, so the moulds and foundry cores stored in specified, controlled conditions could be still used in manufacture.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 127-132
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of ALSV(FD) logic and XTT knowledge representation in the range of ADI properties
Autorzy:
Regulski, K.
Wilk-Kołodziejczyk, D.
Rojek, B.
Kluska-Nawarecka, S.
Adrian, W. T.
Powiązania:
https://bibliotekanauki.pl/articles/380492.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry production
computer aided foundry
application of information technologies
ADI
ALSV
rule based XTT format
odlewnia
odlewy
komputerowe wspomaganie odlewni
zastosowanie technologii informatycznych
Opis:
The objective of studies presented in this publication was structuring of research knowledge about the ADI functional properties and changes in these properties due to material treatment. The results obtained were an outcome of research on the selection of a format of knowledge representation that would be useful in further work aiming at the design, application and implementation of an effective system supporting the decisions of a technologist concerning the choice of a suitable material (ADI in this case) and appropriate treatment process (if necessary). ALSV(FD) logic allows easy modelling of knowledge, which should let addressees of the target system carry out knowledge modelling by themselves. The expressiveness of ALSV (FD) logic allows recording the values of attributes from the scope of the modelled domain regarding ADI, which is undoubtedly an advantage in the context of further use of the logic. Yet, although the logic by itself does not allow creating the rules of knowledge, it may form a basis for the XTT format that is rule-based notation. The difficulty in the use of XTT format for knowledge modelling is acceptable, but formalism is not suitable for the discovery of rules, and therefore the knowledge of technologist is required to determine the impact of process parameters on values that are functional properties of ADI. The characteristics of ALSV(FD) logic and XTT formalism, described in this article, cover the most important aspects of a broadly discussed, full evaluation of the applicability of these solutions in the construction of a system supporting the decisions of a technologist.
Źródło:
Archives of Foundry Engineering; 2016, 16, 2; 75-78
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cr and W on the Crystallization Process, the Microstructure and Properties of Hypoeutectic Silumin to Pressure Die Casting
Autorzy:
Szymczak, T.
Gumienny, G.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/381777.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
innovative foundry
innovative foundry materials
pressure die casting
multicomponent silumin
DTA method
teoria krystalizacji
innowacyjna odlewnia
innowacyjne materiały odlewnicze
odlewnictwo ciśnieniowe
siluminy
metoda DTA
Opis:
This article presents the results of studies in the hypoeutectic silumin destined for pressure die casting with the simultaneous addition of chromium and tungsten. The study involved the derivative and thermal analysis of the crystallization process, metallographic analysis and mechanical properties testing. Silumin 226 grade was destined for studies. It is a typical silumin to pressure die casting. AlCr15 and AlW8 preliminary alloys were added to silumin. Its quantity allowed to obtain 0.1, 0.2, 0.3 and 0.4% of Cr and W in the tested alloy. Studies of the crystallization process as well as the microstructure of the silumin poured into DTA sampler allowed to state the presence of additional phase containing 0.2% or more Cr and W. It has not occurred in silumin without the addition of above mentioned elements. It is probably the intermetallic phase containing Cr and W. DTA studies have shown this phase crystallizes at a higher temperature range than α (Al) solid solution. In the microstructure of each pressure die casting containing Cr and W the new phases formed. Mechanical properties tests have shown Cr and W additives in silumin in an appropriate amount may increase its tensile strength Rm (about 11%), the yield strength Rp0.2 (about 21%) and to a small extent elongation A.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 109-114
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Sand Base Grade and Density of Moulding Sands with Sodium Silicate on Effectiveness of Absorbing Microwaves
Autorzy:
Stachowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/381758.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
microwaves
sodium silicate
high-silica sand
lossiness measurements
odlewnia
mikrofale
krzemian sodowy
piasek kwarcowy
Opis:
In the paper, presented is a research on effectiveness of absorbing electromagnetic waves at frequency 2.45 GHz by unhardened moulding sands prepared of three kinds of high-silica base and a selected grade of sodium silicate. Measurements of power loss of microwave radiation (Pin) expressed by a total of absorbed power (Pabs), output power (Pout) and reflected power (Pref) were carried-out on a stand of semiautomatic microwave slot line. Values of microwave power loss in the rectangular waveguide filled with unhardened moulding sands served for determining effectiveness of microwave heating. Balance of microwave power loss is of technological and economical importance for manufacture of high-quality casting moulds and cores of various shapes and sizes. It was found that relative density influences parameters of power output and power reflected from samples of moulding sand placed in a waveguide. Absorption expressed by the parameter Pabs is not related to granularity of high-silica base: fine, medium and coarse. It was found that the semiautomatic microwave slot line supports evaluation of effectiveness of microwave absorption on the grounds of power loss measurements and enables statistic description of influence of relative density of the sandmix on penetration of electromagnetic waves in unhardened moulding sands.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 103-108
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality and Safety Assurance of Iron Casts and Manufacturing Processes
Autorzy:
Kukla, S.
Powiązania:
https://bibliotekanauki.pl/articles/381237.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
automation in foundry
robotics in foundry
transport systems
quality management
workplace organization
ergonomics of work
odlewnia
automatyzacja w odlewni
robotyka w odlewni
systemy transportowe
zarządzanie jakością
organizacja pracy
ergonomia pracy
Opis:
The scope of this work focuses on the aspects of quality and safety assurance of the iron cast manufacturing processes. Special attention was given to the processes of quality control and after-machining of iron casts manufactured on automatic foundry lines. Due to low level of automation and huge work intensity at this stage of the process, a model area was established which underwent reorganization in accordance with the assumptions of the World Class Manufacturing (WCM). An analysis of work intensity was carried out and the costs were divided in order to identify operations with no value added, particularly at individual manufacturing departments. Also an analysis of ergonomics at work stations was carried out to eliminate activities that are uncomfortable and dangerous to the workers' health. Several solutions were proposed in terms of rationalization of work organization at iron cast after-machining work stations. The proposed solutions were assessed with the use of multi-criteria assessment tools and then the best variant was selected based on the assumed optimization criteria. The summary of the obtained results reflects benefits from implementation of the proposed solutions.
Źródło:
Archives of Foundry Engineering; 2016, 16, 2; 17-20
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Manufacturing Process of Metal Layers in Ceramic Molds of the Burnt-out Models
Autorzy:
Jesiotr, M.
Myszka, D.
Wierzchoń, T.
Powiązania:
https://bibliotekanauki.pl/articles/947455.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
investment casting
polymer patterns
metallic surface layer
odlewnia
formy polimerowe
warstwa powierzchniowa metaliczna
Opis:
This paper presents an innovative casting method that allows manufacturing the layers on the cast by applying the metallic coating inside the mold. In order to define the possibilities of formation of the metal layers on the castings attempts were made to modify the mold and the cast for models created of two selected plastic materials. The main issue was the choice of a suitable coating material and a casting alloy. The procedure was projected in a manner that would enable the model polymer coating to get into reaction with the cast liquid metal after the burn away. The adjustment of the casting cavity was obtained by the nickel coating. The pit was then filled with the aluminum alloy, when studying the aspects of diffusion and adhesion between the two metals (Ni and Al). On the assumption that nickel coating will generate a diffusion connection with the cast material, it is potential to create intermetallic phases of the system of Ni- Al that will modify the surface attributes of the molding surface. Such designed is to obtain, in a single operation, a ready casting part with a diffusion layer surface.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 73-76
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Possibility of Using Dynamic Methods for Assessment of Investment Projects in the Domestic Foundry Industry
Autorzy:
Szymszal, J.
Lis, T.
Gajdzik, B.
Kliś, J.
Powiązania:
https://bibliotekanauki.pl/articles/380393.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computer-aided foundry production
dynamic methods for assessment
investment projects
efficiency calculus
odlewnia
komputerowe wspomaganie produkcji
projekty inwestycyjne
rachunek efektywności
Opis:
A comparative analysis involving the evaluation of the effectiveness of investment projects can be based on various rules indicating selection of the most favorable decisions. The dynamic methods for assessment of investment projects discussed in this article, which consider the possibility of modifying the predetermined investment options, are quite complex and difficult to implement. They are used both in the construction phase of the new company, as well as in its subsequent modernization. The assessments should be characterized by a high coefficient of the economic efficiency. The, observed in practice, high dynamic variability of both the external and internal conditions under which the company operates is the reason why in the process of calculating the economic efficiency of investment projects, there is a significant number of random parameters affected by high uncertainty and risk. Investments in the metallurgical industry are characterized by a relatively long cycle of implementation and operation. These are capital-intensive projects and often mistakenly taken investment decisions end in failure of the investment project and, consequently, in the collapse of the company. In addition, the applied methods of risk assessment of investment projects, especially the dynamic ones, should be fully understood by managerial staff and constitute an easy to use, yet accurate tool for improving the efficiency of the company.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 103-106
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Quality of Investment Castings Produced Based on the Rapid Prototyping Techniques with Products of Powder Sintering
Autorzy:
Karwiński, A.
Haratym, A.
Soroczyński, A.
Kowalski, P.
Powiązania:
https://bibliotekanauki.pl/articles/382602.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
investment casting
powder sintering
casting quality
odlewnia
spiekanie proszku
jakość odlewu
Opis:
The proposed research work will be related to the comparison of the dimensional accuracy and surface roughness of elements produced by two different methods. Castings are made using modern rapid prototyping techniques and investment casting. For selected parts there will be presented an assessment in terms of manufacturability, design manufacturing costs, operating parameters and energy consumption of production. The analysis of used methods allow for the evaluation of their suitability as alternative manufacturing techniques.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3 spec.; 31-34
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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