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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
Tytuł:
Dielectric Properties of High-Silica Sand at 2.45 GHz
Autorzy:
Opyd, B
Nowak, D.
Granat, K.
Powiązania:
https://bibliotekanauki.pl/articles/382869.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
microwaves
moulding sand
high-silica sand
innowacyjne technologie odlewnicze
mikrofale
masa formierska
piasek kwarcowy
Opis:
In the paper, presented are measurements of permittivity (εr) and dielectric loss factor (tgδ) of high-silica moulding sand, determined at 2.45 GHz by perturbation method on a stand of waveguide resonance cavity. Determined were electrical properties of the main component of moulding sands, i.e. high-silica base, critical for their heating kinetics. The measurements were carried-out for six kinds of high-silica sand with diverse grain size distribution. Analysis of the results indicates that both permittivity and loss tangent values are similar for all kinds of high-silica moulding sand. Irrespective of their grain size analysis, neither of the examined sandmixes shows susceptibility to action of 2.45 GHz microwave field. The presented results make a ground for developing a mathematical model of microwave heating of technological systems composed of moulding sand and foundry tooling.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 136-139
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innovative microwave hardening of water-glass containing sandmixes in technical-economic approach
Autorzy:
Małachowska, A.
Stachowicz, M.
Granat, K.
Powiązania:
https://bibliotekanauki.pl/articles/382448.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
mikrofale
szkło wodne
masa formierska
masa rdzeniowa
innovative foundry technologies
microwave hardening
water glass
moulding sand
core sand
Opis:
In recent years, observed is increasing interest in sandmixes containing inorganic binders. These binders, including also water-glass, are harmless for the environment, neutral for humans and relatively cheap. In spite of numerous advantages, their wide application is restricted by poor knock-out properties and problems related to rebonding. Therefore, numerous researches aimed at eliminating disadvantages of water-glass binder are directed, among others, to modifying structure of hydrated sodium silicate or to applying new hardening techniques. The innovative method of rapid hardening by microwave heating, that permits restricting quantity of used binder and thus improving knock-out properties, meets expectations of present-day foundries. In this paper, compiled is available information on microwave hardening of water-glass containing sandmixes, as well as costs of practical application of this technology are evaluated on the ground of own research.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 75-80
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of microwaves for binder content assessment in moulding sands
Autorzy:
Nowak, D.
Powiązania:
https://bibliotekanauki.pl/articles/380212.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
masa formierska
spoiwo
mikrofale
innovative foundry technologies
moulding sand
binder
microwaves
Opis:
The paper presents results of preliminary examinations on possibility of determining binder content in traditional moulding sands with the microwave method. The presented measurements were carried-out using a special stand, the so-called slot line. Binder content in the sandmix was determined by measurements of absorption damping Ad and insertion losses IL of electromagnetic wave. One of main advantages of the suggested new method of binder content measurement is short measuring time.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 83-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody poprawy jakości ekologicznych mas formierskich ze szkłem wodnym
Methods of Quality Improvements of Ecological Moulding Sands with Water Glass
Autorzy:
Kmita, A.
Hutera, B.
Powiązania:
https://bibliotekanauki.pl/articles/381917.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne materiały
ekologia
nowoczesne technologie
nanocząstki
masa formierska
innovative materials
ecology
modern technologies
nanoparticles
molding sand
Opis:
Masy formierskie ze szkłem wodnym mają szereg charakterystycznych cech, wynikających bezpośrednio z właściwości szkła wodnego. Niewątpliwą zaletą tych mas jest fakt, iż są one ekologiczne, a spoiwo jest tanie i łatwo dostępne. Natomiast w świetle właściwości technologicznych wykazują pewne wady, które ograniczają ich szerokie wykorzystanie w odlewnictwie. Ich ujemną cechą jest mała wytrzymałość w pierwszej fazie utwardzania; proces utwardzania nie przebiega „do końca” i jest ponowie uaktywniany po zalaniu formy ciekłym stopem. Efektem tego jest zwiększenie wytrzymałości masy co jest przyczyną złej wybijalności mas z tym spoiwem. Wykazują one również małą podatność do regeneracji. Dlatego też poszukuje się sposobów wyeliminowania lub ograniczenia tych wad. W artykule przedstawiono metody poprawy jakości mas formierskich ze szkłem wodnym. Procesy te, w uproszczeniu, mogą przebiegać na drodze: modyfikacji składu osnowy masy formierskiej, sposobu jej utwardzania lub modyfikacji samego spoiwa. W metodach tych wykorzystywane są często najnowsze techniki oraz materiały nowej generacji.
Moulding sands with water glass have several characteristic properties, resulting directly from the water glass properties. An undoubted good point of these moulding sands is the fact, that they are ecological and their binder is cheap and easily obtainable. However their technological properties indicate certain failures, which limit their wider application in foundry engineering. Their negative property is low strength in the first phase of hardening; their hardening process is not ‘fully finished’ and is reactivated after the mould pouring with liquid alloy. In effect the increased moulding sand strength is the reason of bad knocking out of moulding sands with this binder. They are also not easily susceptible to the reclamation treatment. Therefore, ways of eliminating or limiting of these faults are looked for. Some methods of improving the quality of moulding sands with water glass are presented in the paper. These processes, in simplification, can concern: modifications of moulding sand matrices, methods of their hardening or modifications of a binder itself. The most modern techniques and materials of the new generation are often applied in these methods.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2 spec.; 45-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New look at the process of reclamation of moulding sands
Autorzy:
Dobosz, S. M.
Major-Gabryś, K.
Hosadyna, M.
Powiązania:
https://bibliotekanauki.pl/articles/380262.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
masa formierska
innovative foundry materials
innovative foundry technologies
moulding sand
reclaim
ester hardener
Opis:
This paper presents a new perspective on the issue of reclamation of moulding and core sands. Taking as a premise that the reclamation process must remain on the surface of grains some not separated binding materials rests, it should be chosen the proper moulding sand's composition that will be least harmful for the reclaim quality. There are two different moulding and core sands taken into examinations. The researches prove that a small correction of their compositions (hardener type) improves the quality of the received reclaims. Carried out in this article studies have shown that such an approach to the problem of reclamation of the moulding and core sands is needed and reasonable.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 19-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Microwave Drying Parameters on the Properties of Synthetic Moulding Sands
Autorzy:
Nowak, D.
Gal, B.
Włodarska, A.
Granat, K.
Powiązania:
https://bibliotekanauki.pl/articles/381434.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
drying
moulding sand
strength properties
permeability
innowacyjne technologie odlewnicze
suszenie mikrofalowe
piasek formierski
właściwości wytrzymałościowe
przepuszczalność
Opis:
In this work, the influence of microwave drying parameters such as irradiation time and microwave power level on the properties of synthetic moulding sands is presented. Determination of compressive strength Rcs, shear strength Rts and permeability Ps of synthetic moulding sands with the addition of two different bentonites, after drying process with variable microwave parameters were made. The research works were carried out using the microwave oven with regulated power range of the electromagnetic field. From the results obtained, the significant influence of both drying time and microwave power level on the selected properties of moulding sands was observed. In comparison to the conventional drying method, microwave drying allows to obtain higher compressive strength of the synthetic moulding sand. The influence of application microwave irradiation on permeability was not observed. Higher strength characteristics and shorter drying time are major advantages of application of the electromagnetic irradiation for drying of the synthetic moulding sand with regard to conventional drying method.
Źródło:
Archives of Foundry Engineering; 2019, 4; 51-54
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Sand Fluidization on Structure and Properties of Aluminum Lost Foam Casting
Autorzy:
Kaliuzhnyi, P.
Powiązania:
https://bibliotekanauki.pl/articles/380477.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
lost foam casting
aluminum alloy
sand fluidization
innowacyjne technologie odlewnicze
metoda traconej piany
stop aluminium
fluidyzacja
Opis:
The article presents investigation results of the effect of sand fluidization on the structure and mechanical properties of AlSi9 aluminum alloy. Castings were made by lost foam casting process with sand fluidization in mold at the stages of their solidification and cooling. Sand fluidization was achieved by blowing sand bed with compressed air in a foundry container. The metallographic study was carrying out on samples cut from different sections of the castings. Mechanical properties were determined on specimens made from cast samples. Microstructural analysis showed that sand fluidization increases the cooling rate, as a result, the main microstructural components of the alloy – SDAS, eutectic silicon and needles of the rich-iron phase – decrease. Moreover, in different sections of the casting structure is more uniform. With an increasing the air flow rate, a greater refinement of the structure is observed. Through the use of sand fluidization, the mechanical properties of LFC aluminum alloys increase to the level of gravity die castings.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 122-126
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Tendency of Moulding Sands to Generate Core Cracks
Autorzy:
Grabarczyk, A.
Dobosz, S. M.
Kusiński, J.
Major-Gabryś, K.
Powiązania:
https://bibliotekanauki.pl/articles/380432.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
moulding sand
binder
elasticity
cracking
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
masa formierska
spoiwo
Opis:
The constant growth of foundry modernization, mechanization and automation is followed with growing requirements for the quality and parameters of both moulding and core sands. Due to this changes it is necessary to widen the requirements for the parameters used for their quality evaluation by widening the testing of the moulding and core sands with the measurement of their resistance to mechanical deformation (further called elasticity). Following article covers measurements of this parameter in chosen moulding and core sands with different types of binders. It focuses on the differences in elasticity, bending strength and type of bond destruction (adhesive/cohesive) between different mixtures, and its connection to the applied bonding agent. Moulding and cores sands on which the most focus is placed on are primarily the self-hardening moulding sands with organic and inorganic binders, belonging to the group of universal applications (used as both moulding and core sands) and mixtures used in cold-box technology.
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 157-161
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elasticity of Moulding Sands – a Method of Reducing Core Cracking
Autorzy:
Dobosz, S. M.
Grabarczyk, A.
Major-Gabryś, K.
Powiązania:
https://bibliotekanauki.pl/articles/380966.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
moulding sand
binder
elasticity
cracking
innowacyjne technologie odlewnicze
innowacyjne materiały
piasek formierski
spoiwo
elastyczność
Opis:
This paper focuses on mechanical properties of self hardening moulding sands with furfuryl and alkyd binders. Elasticity as a new parameter of moulding sands is investigated. With the use of presented testing equipment it is possible to determine force kinetics and deformation of moulding sand in real time. The need for this kind of study comes from the modern casting industry. New foundries can be characterized with high intensity of production which is correlated with high level of mechanization and automatization of foundry processes. The increasingly common use of manipulators in production of moulds and cores can lead to generation of new types of flaws, caused by breakage in moulds and cores which could occur during mould assembly. Hence it is required that moulds and cores have high resistance to those kinds of factors, attributing it with the phenomenon of elasticity. The article describes the theoretical basis of this property, presents methods of measuring and continues earlier research.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 31-36
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Silica Sand on Surface Casting Quality
Autorzy:
Beňo, J.
Adamusová, K.
Merta, V.
Bajer, T.
Powiązania:
https://bibliotekanauki.pl/articles/383370.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative materials
castings defects
silica sand
veining
COLD-BOX amine
innowacyjne technologie odlewnicze
materiały innowacyjne
wady odlewów
piasek kwarcowy
Opis:
The current casting production of castings brings increased demands for surface and internal quality of the castings. Important factors, that influence the quality of casted components, are the materials used for the manufacture of moulds and cores. For the preparation and production of moulds and cores, in order to achieve a low level of casting defects, then it used a high quality input materials, including various types of sands, modified binders, additives, etc. However, even the most expensive raw materials are not a guarantee to achieve the quality of production. It is always necessary to choose the appropriate combination of input material together with an appropriate proposal for the way of the production, the metallurgical treatment of cast alloy, etc. The aim of this paper is to establish the basic principles for the selection of the base core mixtures components – sands to eliminate defects from the tension, specifically veining. Various silica sand, which are commonly used in foundries of Middle Europe region, were selected and tested.
Źródło:
Archives of Foundry Engineering; 2019, 2; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on Assessment of the Applicability of Malted Barley Binder in Moulding Sand Technology
Autorzy:
Samociuk, B.
Gal, B.
Nowak, D.
Powiązania:
https://bibliotekanauki.pl/articles/2079587.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative materials
mechanical properties
moulding sand
organic binder
innowacyjne technologie odlewnicze
innowacyjne materiały
właściwości mechaniczne
masa formierska
spoiwo organiczne
Opis:
The foundry industry is looking for solutions that improve the quality of the finished product and solutions that reduce the negative impact of the industry on the natural environment [26]. This process leads to work on the use of new or previously unused materials for binders. Organic and inorganic foundry binders are replaced by renewable materials of plant origin to meet the requirements of both the foundry customers and the environmental and health and safety regulations. The aim of this work was to identify the applicability of renewable and organic malted barley binder in moulding sand technology. The influence of the malt binder content on dry tensile strength, dry bending strength, dry permeability, dry wear resistance and flowability were evaluated. The results show that the malted barley binder can be self contained material binding the high-silica sand grains. Selected mechanical properties of moulding sands were found to increase with an increase in binder content. It was observed that malted barley binder creates smooth bonding bridges between high-silica sand grains.
Źródło:
Archives of Foundry Engineering; 2021, 21, 1; 74-80
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the renewability of polymeric binders for foundry
Autorzy:
Grabowska, B.
Kaczmarska, K.
Bobrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/380277.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
masa formierska
spoiwo polimerowe
sieciowanie
innovative foundry materials
innovative foundry technologies
moulding sand
polymeric binders
crosslinking
renewability
Opis:
In this paper the results of studies of polymeric binders on the example of the new BioCo2 binder, including the problem of its renewability, are presented. The results of structural studies (FT-IR) for the BioCo2 binder before and after crosslinking, and bending strength tests Rgu fresh and renewed cured molding sands with BioCo2 binder are discussed. The cross-linking binder and curring of moulding sand was carried out by physical agents (microwave radiation, temperature). On the basis of obtained results was shown that it is possible to restore the initial properties of the adhesive of BioCo2 binder. The initial properties of moulding sand can be achieved, after the cross-linking binders and after curing in the moulding sands with bioCo2 binder , by supplementing the moulding sand composition by the appropriate amount of water.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 37-42
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie PLA jako spoiwa w masach formierskich i rdzeniowych
Application of PLA as a Binder in Molding and Core Sands
Autorzy:
Kozłowski, J.
Kochański, A.
Perzyk, M.
Tryznowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/381798.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
materiały innowacyjne
innowacyjne technologie odlewnicze
biopolimery
spoiwa
piasek otaczany
metoda HOT-BOX
innovative materials
innovative foundry technologies
polymers
binder
sand surrounded
HOT-BOX method
Opis:
Rosnąca popularność polimerów biodegradowalnych, możliwości ich wytwarzania, przetwarzania i wykorzystania, stwarzają szansę opracowania nowych materiałów wiążących, do zastosowania w przemyśle odlewniczym. Nowe spoiwa biopolimerowe, spełniające wymagania z zakresu ochrony środowiska, mogą stanowić alternatywę dla dotychczas stosowanych spoiw do mas formierskich i rdzeniowych, w przypadku uzyskania wymaganych właściwości wytrzymałościowych i technologicznych. Prezentowane rozwiązanie, alternatywne do dotychczas opisywanych w literaturze, obejmujące badania mas otrzymywanych z piasków otaczanych spoiwem biodegradowanlym PLA, dotyczy optymalizacji właściwości wytrzymałościowych, w odniesieniu do procentowej zawartości biopolimeru, temperatury i czasu wytwarzania form i rdzeni metodą HOT-BOX. Uzyskane wyniki pozwalają sądzić, że biopolimery mogą być skutecznym zamiennikiem dotychczas stosowanych spoiw mas formierskich i rdzeniowych, a metoda wytwarzania z użyciem piasków otaczanych, może być równie skuteczna jak metody alternatywne.
Currently moulding sand with biopolymers as a binding agent appears to be probably the most interesting achievement in the mould production from ecology point of view. New biopolymer materials offer the parameters comparable to those which have been in use up to now. Moulding sands with a biopolymer binder were produced. The moulding process of 2% PLA sandmix involving different fusion temperatures and times was studied and the results presented. The results of observations and ultimate tensile strength tests were offered. The obtained results point to the fact that the new sandmix moulding method offered similar results that obtained in the literature. The issue is viewed as requiring further research.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2 spec.; 51-54
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Various Matrixes on the Strength Properties of Moulding Sands with Thermally Hardened Hydrated Sodium Silicate for the Ablation Casting Process
Autorzy:
Major-Gabryś, Katarzyna
Puzio, Sabina
Bryłka, Agata
Kamińska, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/2056023.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
innovative foundry technologies and materials
moulding sand
ablation casting
water glass
thermal curing
innowacyjne technologie
materiały odlewnicze
piasek formierski
odlewanie ablacyjne
szkło wodne
utwardzanie termiczne
Opis:
The essence of ablation casting technology consists in pouring castings into single-use moulds made from the mixture of sand and a water-soluble binder. After pouring the mould with liquid metal yet while the casting is still solidifying, the mould destruction (washing out, erosion) takes place using a stream of cooling medium, which in this case is water. This paper focuses on the selection of moulding sands with hydrated sodium silicate for moulds used in ablation casting. The research is based on the use of water glass 145 and 150 as binders. As part of the research, loose moulding mixtures based on two silica sands from different sand mines with different content of binders were prepared. The review of literature data and the results of own studies have shown that moulding sand with hydrated sodium silicate hardened by dehydration is characterized by sufficient strength properties to be used in the ablation casting process. Our own research also confirmed the possibility of using these sand mixtures in terms of both casting surface quality and sand reclamation. The results presented in this paper prove that both sand grains and types of binder tested may be used as components in moulding sands devoted to ablation casting.
Źródło:
Journal of Casting & Materials Engineering; 2021, 5, 2; 31--35
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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