Temat: pressing - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The effect of construction and technological parameters on the efficiency of apple juice pressing
Wpływ parametrów konstrukcyjnych i technologicznych na efektywność tłoczenia soku jabłkowego
Autorzy:: Wilczyński, K.
Kobus, Z.
Nadulski, R.
Tematy:: pressing efficiency
apple juice
pressure of pressing
wydajność tłoczenia
sok jabłkowy
ciśnienie tłoczenia; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Powiązania:: https://bibliotekanauki.pl/articles/337434.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the results of the research concerning the efficiency of apple juice processing. In the tests apples of variety Idared were used. Two types of laboratory basket presses were applied. The first one was with perforated cylinder and solid bottom and the second one with perforated bottom and solid cylinder. Pressing was carried out in two modes, continuous and periodic. The yield of juice pressing and moisture content in pomace was determined. The yield of extraction was ranged from 52% to 60.7%. There was significant effect of the load mode on the yield of juice pressing. The yield of extraction in periodic mode was higher than in continuous mode for both of investigated presses. The relationship between the yield of extraction and the pressure of pressing was described by the power law equation. There was no influence of press construction on the pressing yield of apple juice.
W pracy przedstawiono wyniki badań nad efektywnością procesu tłoczenia soku jabłkowego. Do analiz użyto jabłek odmiany Idared. Wykorzystano dwa rodzaje pras, prasa pierwsza posiadała perforowany cylinder i pełne dno, zaś prasa druga perforowane dno i pełny cylinder. Proces tłoczenia przeprowadzono w dwóch trybach: okresowym i ciągłym. Określono wydajność tłoczenia i zawartość wody w wytłokach z jabłek. Wydajność tłoczenia zmieniała się w zakresie od 52% do 60,7%. Stwierdzono wyraźny wpływ trybu obciążania materiału na wydajność tłoczenia. Wydajność tłoczenia w trybie okresowym była wyższa w porównaniu z trybem ciągłym dla obu badanych pras. Zależność pomiędzy wydajnością soku a ciśnieniem tłoczenia opisano za pomocą równania potęgowego. Nie stwierdzono wpływu konstrukcji prasy na wydajność tłoczenia.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evaluation of internal quality at manufactural corporation
Autorzy:: Halenár, M.
Jánošová, M.
Hujo, L.
Tematy:: pressing
internal quality
Quality Alert; Pokaż więcej
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Powiązania:: https://bibliotekanauki.pl/articles/95556.pdf Link otwiera się w nowym oknie
Opis:: This work is focused on evaluation of internal quality in manufactural corporation. Huhn PressTech Ltd. is a company producing metal products as results of pressing process, construction units and other components used in automotive industry. The aim of the article is to review the process of internal quality evaluation method on daily basis. Constantly growing demand on metal chipless machining replaces the older chip`s technology. This paper aimed to clarify, how the company performs fault evaluation and what is done for their correction. To explain the procedure of evaluation in detail and demonstrate the solution, there were artificially made parts 3333 and 5555 in the company. The result is called Quality Alert.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 3.

Tytuł:: LMO Ceramics Microstructure
Autorzy:: Bruś, B.
Zarycka, A.
Tematy:: LMO
microstructure
hot pressing
free sintering; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/350959.pdf Link otwiera się w nowym oknie
Opis:: The aim of this work was to characterize the microstructure of LMO type ceramics. The ceramics obtained by the free sintering at two temperatures 1473 K and 1573 K and two sintering times 6 and 12 h was the test material. One series was also obtained by the hot pressing method for a comparison. In all the cases the material synthesis was conducted by the solid-state reaction method at 1173 for 24 h. Photographs of the specimen fractures were taken by a scanning electron microscope to characterize the microstructure of the ceramics obtained in a more detailed way. The VISILOG 4 system, enabling to calculate a lot of parameters characterizing the material microstructure, such as e.g.: a number of grains on the unit area, an average grain size, shape indexes of the grains in question, was used as well. It allows determining a grain size distribution, and a frequency of presence of grains with the specific shape index. By analyzing a set of the parameters obtained an influence of the technological conditions on the microstructure of the material in question, and on its properties and applicability at the same time can be determined.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 4.

Tytuł:: Characterisation of Selected Apple Cultivars in the Aspect of Juice Production in the Condition of a Farm
Autorzy:: Nadulski, Rafał
Ahmed, Zeyad
Kobus, Zbigniew
Guz, Tomasz
Wilczyński, Kamil
Wydawca:: Dept. of Mach. Exploit. and Management of Prod. Processes, ULS in Lublin, Poland
Cytata wydawnicza:: Nadulski R., Kobus Z., Wilczyński K., Ahmed Z. 2017. Characterisation of Selected Apple Cultivars in the Aspect of Juice Production in the Condition of a Farm. [in:] Lorencowicz E. (ed.), Uziak J. (ed.), Huyghebaert B. (ed.). Farm Machinery and Processes Management in Sustainable Agriculture, 9th Int. Scient. Symp. ULS Lublin, p.255-259
Opis:: Pressing is the most common method of fruit juice acquisition. Not all apple cultivars are suitable for juice pressing. The use of suitable fruit cultivars for juice pressing may reduce the cost of pressing and at the same time guarantee high quality of the juice produced. The scope of the study comprised the determination of pressing efficiency and of the quality parameters of apple juice obtained, such as acidity and the content of extract. The results of the study indicate that the efficiency of pressing and the quality of the juice obtained are significantly affected by the varietal traits of the apples. The choice of suitable cultivars allows to achieve a high pressing efficiency and to obtain juice characterised by a high content of extract and high acidity.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

Inne

Książka

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Skocz do pozycji: 5.

Tytuł:: Processing and Characterization of Fe-Cu-Ni Sinters Prepared by Ball Milling and Hot Pressing
Autorzy:: Borowiecka-Jamrozek, J.
Tematy:: matrix
diamond
hot pressing
diamond tools; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/354394.pdf Link otwiera się w nowym oknie
Opis:: The main objective of the present work was to determine the effect of powder composition on microstructure and properties of iron-base materials used as matrices in diamond impregnated tools. The Fe-Cu-Ni powders premixed and ball-milled for 30 hours, were used for the experiments. The influence of manufacturing process parameters on microstructure and mechanical properties of produced sinters was investigated. Sintering was done by hot-pressing technique in graphite mould. The powders were consolidated to a virtually pore-free condition during 3 minutes hold at 35 MPa and 900°C. Investigations of the sintered materials included: density, hardness, static tensile test and X-ray diffraction (XRD) analysis. Microstructural and fractographic observations were also made with a scanning electron microscope (SEM). The obtained results indicate that the sintered parts have a high density, close to the theoretical value, good plasticity, relatively high hardness and yield strength, and are characterized by a coarse-grained microstructure.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 6.

Tytuł:: Dense Alumina Ceramics Obtained by Gelcasting and Cold Isostatic Pressing with the Use of 2-Carboxyethyl Acrylate
Autorzy:: Pietrzak, E.
Sakka, Y.
Nakamura, J.
Wiecinska, P.
Szafran, M.
Tematy:: gelcasting
cold isostatic pressing
alumina
mercury porosimetry; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/354388.pdf Link otwiera się w nowym oknie
Opis:: In ceramic forming techniques high particles packing can provide better properties of the final ceramic products. The high quality of the material coupled with the shape complexity of the ceramic product is still challenging. The aim of this work was the optimization and preparation of the ceramic samples based on two alumina powders of different particle size (AA05: 0.5 μm and TM-DAR: 0.15 μm). Firstly, ceramic suspensions of 50 vol.% solid loading and the volumetric ratio of AA05 to TM-DAR 1:1, 2:1, 3:1, 4:1, respectively have been prepared. The 2-carboxyethyl acrylate was applied as the new monomer limiting the negative effect of oxygen inhibition. Additionally, the cold isostatic pressing (CIP) was used in order to increase relative density of green bodies. The results of presented research have shown that samples with the ratio of AA05 to TM-DAR 2:1 were characterized by the highest green density (62%). Moreover, CIP process proved to be effective and increased the density of green bodies from 62% to 67%. The pore size distribution of the green bodies has been measured. Samples were sintered at different conditions (1400°C, 1450°C and 1500°C for 1h and 1300°C, 1400°C, 1450°C and 1500°C for 5h).
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 7.

Tytuł:: Quantitative Evaluation of Porosity in Turbine Blades Made of IN713C Superalloy After Hot Isostatic Pressing
Autorzy:: Roskosz, S.
Tematy:: superalloys
turbine blades
hot isostatic pressing
porosity; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/355974.pdf Link otwiera się w nowym oknie
Opis:: The aim of this paper is an assessment of the influence of hot isostatic pressing treatment on porosity of cast samples - turbine blades and vane clusters made of the IN713C superalloy. Two variants of HIP treatments, differing in pressure from each other, have been used. The quantitative evaluation of the porosity was performed using light microscopy and quantitative metallography methods. The use of the hot isostatic pressing significantly decreased the volume fraction and size of pores in the test blades, the remaining pores after the HIP process being characterized by a round shape. The increased pressure has caused significant reductions in the area fraction and size of the pores.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 8.

Tytuł:: FEM and experimental based analysis of the stamping process of aluminum alloy
Autorzy:: Różyło, P.
Wójcik, Ł.
Tematy:: pressing
experimental study
numerical analysis
finite element method; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/102747.pdf Link otwiera się w nowym oknie
Opis:: The subject of the study was aluminum samples of varying thickness. The aim of the study was to perform the experimental stamping process of the samples on a universal testing machine and a numerical analysis on two independent computer systems Abaqus® and Deform-3D. As part of the numerical analysis, bilinear material model was included, taking into account elastic and plastic characteristics. The study was conducted in a dynamic environment with geometric nonlinearity. The results obtained from experimental research were confronted with those obtained by FEM computer simulation. During the research, numerical model of the stamping process has been developed, which was validated with the results of experimental research.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 9.

Tytuł:: Wpływ procesu Hot Isostatic Pressing (HIP) na wybrane właściwości ceramiki z tlenku glinu
Influence of Hot Isostatic Pressing (HIP) process on select properties of alumina ceramic
Autorzy:: Perkowski, K.
Osuchowski, M.
Witosławska, I.
Witek, A.
Tematy:: ceramika z tlenku glinu
spiek korundowy
Hot Isostatic Pressing
właściwości fizyczne
alumina ceramic
sintered corundum
Hot Isostatic Pressing process
physical properties; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Powiązania:: https://bibliotekanauki.pl/articles/391890.pdf Link otwiera się w nowym oknie
Opis:: Przedstawiono wstępne prace mające na celu określenie wpływu procesu Hot Isostatic Pressing (HIP) na wybrane właściwości ceramiki z tlenku glinu. Próbki spieczonego swobodnie tlenku glinu o znanych parametrach gęstości pozornej i wytrzymałości mechanicznej poddano procesowi hipowania, czyli powtórnego wypalenia w warunkach wysokiego ciśnienia izostatycznego działającego bezpośrednio na próbki. Proces prowadzono w temperaturze 1600°C przy ciśnieniu izostatycznym argonu równym 300 MPa. W wyniku przeprowadzonego eksperymentu uzyskano gęstą ceramikę korundową, o gęstości bliskiej 100% wartości gęstości teoretycznej. Wartości wytrzymałości mechanicznej na zginanie próbek poddanych procesowi HIP uległy nieznacznie pogorszeniu w stosunku do próbek, które były tylko spiekane swobodnie.
We presence introductions works which main target is term Hot Isostatic Pressing (HIP) process on select properties alumina ceramic. Freely sintered alumina samples about known parameter such as apparently density and mechanical durability submit (HIP) process the other hand samples submit again sinter in other condition such as temperature 1600°C and isostatic argon pressure equally 300 MPa. In our experiment we obtain very density alumina ceramic. Density obtained ceramic was relative 100% theoretical density. Values mechanical durability on bend samples after HIP process were a bit worse than samples which were sinter freely.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 10.

Tytuł:: Challenges of Using Elemental Nickel and Titanium Powders for the Fabrication of Monolithic NiTi Parts
Autorzy:: Farvizi, M.
Tematy:: hot isostatic pressing
NiTi
mechanical alloying
microstructure
mechanical properties; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/958198.pdf Link otwiera się w nowym oknie
Opis:: Due to its interesting properties and wide applications in different industries, fabrication of monolithic NiTi with cost-effective methods is an important and attractive issue. One of the economic ways to fabricate NiTi is employing elemental nickel and titanium powders. In this study, effects of using elemental powders as a precursor on the microstructure and mechanical properties of HIP-consolidated NiTi samples will be explored. The result of XRD analysis showed that after HIP process an interwoven structure which consists of NiTi₂, Ni₃Ti and B2-B19′ NiTi evolves. The formation of NiTi₂/Ni₃Ti intermetallics is thermodynamically favored which affects different aspects of this alloy: (i) it alters martensitic transformation temperatures; (ii) restricts essential properties of this alloy such as PE and SME, (iii) increases hardness, and (iv) yields to premature fracture at small strains during tensile tests.
Dostawca treści:: Biblioteka Nauki

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