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1

The destructive effect of fine fractions of soybean meal in transport processes

Drzewieniecka Beata

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

393--398

EN

Soybean meal is one of the most popular components of compound feed. The rise of its demand in the world causes a constant interest in this cargo and to conduct research in different directions. This is related to its inherent properties, and to the continuous changes that occur in it. Soybean meal is a solid bulk cargo. Loose soybean meal, apart from larger particles, also contains fine and dusty/ powdery fractions, which create the risk of explosion and environmental pollution. The problem of protecting the environment against dusting of fine fractions of soybean meal is very important in the cargo handling processes. An additional aspect is the destructive effect of powdery fractions during these processes. The results of the research on the degrading effect of fine fractions of soybean meal and its compounds on the means of transshipments were presented. Due to the interaction of esters and other compounds contained in the soybean meal, the research has the implications for the changes in the properties of the rubber elements of the elevator conveyor. The effect of these changes may be the reduced durability of the conveyor belts and the associated risks such as operational failures.

2

A characteristic of selected properties of vulcanised rubber elements used on the “Izabel” inland vessel

Pawłowska P., Matuszak Z., Sosik K., Chovancová M.

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

675-679

EN

Vulcanised rubber as a complex system is made from the basic component being virgin rubber and various components amounting to 10-15 per cent or even more. The material gains its most valuable properties in the final phase of processing i.e. vulcanisation. In mechanical as well as automotive engineering it is important for vulcanised rubber to be resistant to grease, oil and fuel in high operating temperatures. Being one of the very valuable isolation materials, vulcanised rubber is also characterized by dielectric and elastic properties as well as distinguished resistance to operating conditions (high/low temperature, weather conditions). All the above mentioned applications of vulcanised rubbers are also found in the shipyard industry. Their use is also very much predicated on the properties such as: ability to attenuate mechanical vibrations, high elasticity, considerable elastic deformability under static and dynamic loads, low permeability of water and gas, resistance to various chemicals, and other. The purpose of this article was to determine the hardness of vulcanised rubber samples obtained from various places on the “Izabel” inland barge. The scope of the study covered sampling and preparing the samples for testing (i.e. cleaning and degreasing the samples). Then, the hardness of the samples was measured using the Shore hardness test. The first part of the article presents the general concept of vulcanised rubber, its main components, properties, applications, and ageing. The second part focuses on the research scope and measuring the hardness of vulcanised rubber samples obtained from the “Izabel” inland barge. vulcanised rubber, hardness, ageing, wear and tear wulkanizowanej gumy, twardość, starzenie się, zużycie

3

The importance of experimental parameters when testing the hardness of rubber

Hodson R., Lackovic S.

Elastomery

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2002

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T. 6, nr 3

17-24

EN

Hardness is one of the most widely measured properties used to characterise rubber as it is a practical way of determining the degree of vulcanization of a sample. Two scales are in general use throughout the world - the IRHD (International Rubber Hardness Degree) scale and the Shore scale. The two test methods use totally different indenture geometries, applied forces, test times and procedures. This paper looks at the instruments in question, studies the differences between the tests and their relationship between scales where possible. It also highlights the merits of each instrument and test type.

PL

Twardość jest najczęściej mierzoną właściwością charakteryzującą gumę i stanowi praktyczny sposób oznaczenia stopnia zwulkanizowania próbki. Ogólnie na świecie używane są dwie skale: IRHD (International Rubber Hardness Degree) i Shore'a. Te dwie metody badania całkowicie różnią się pod względem geometrii czujnika, przyłożonej siły, czasu pomiaru i procedur. W artykule przedstawiono różnice między tymi badaniami i możliwe relacje między skalami (twardości). Wyjaśniono także zasadę działania każdego z aparatów i typ pomiaru.