There is a large number of materials that can be used for FDM additive manufacturing technology. These have different strength properties, they are designed purposes. They highly strong or flexible, abrasion-resistant, example environments with higher thermal loads. However recently new innovative and progressive come to the practice, which include nano-composite particles, bringing added value. One such material Conductive PLA material, capable conducting electric current. The aim this...

In this paper the study of recycling technology for production refuse derived fuel (RDF) is described. Various types wastes (wood, carton, paper, plastic and textile) were pro- cessed by two-shaft single-shaft shredders to obtain output product (1-2 mm), which suitable briquetting process. For samples manufacturing equipment developed at Slovak University Technology in Bratislava was used. Technological test showed that municipal waste higher pressing temperature compacting pressure should...

In solid biofuel manufacture technological and material variables influence the densification process thus also final briquette quality. The impact of these variables, especially compression pressure temperature, parameters (particle size moisture content) can generally be observed during biomass in quality indicators, where abovementioned have a significant influence, on mechanical indicators (briquette density, durability, etc.). This paper presents results experimental research dealing...

Production of technical parts for Mechanical Engineering field is very important. There are many conditions which the produced have to satisfy. Very important functional accuracy final parts. This could be evaluated in different ways. For example it can shape or dimensional accuracy. paper focused Fused Deposition Modelling (FDM) technology used Additive Manufacturing process. The additive manufacturing directly from virtual model and digital file obtained by direct modelling with CAD...

Agricultural materials (LF products) can be considered biologically living organisms due to their structure and the composition of colloidal capillary-porous substances in them. They contain a large number microscopic pores, microcapillaries macrocapillaries, which water is able pass from inner parts surface grain, vice versa. Thus, it concluded that drying an important demanding aspect agricultural production. To determine optimal process for cereals nutritional, energy, economic...

Abstract One of the directions for increasing efficiency turning is use special toolholders with elastic elements. Installation cutter guides or joints provides following additional possibilities during processing on lathes: micro-positioning cutter; oscillating movements chip crushing ultrasonic processing; vibration resistance cutting process by changing position main axes flexibility relative to direction force.

Laminated glass is ever more frequently used nowadays. This applies to the automobile industry and construction industry. In cars, this refers mostly front rear windows, whereas in construction, technical safety for railings window glass. The task of type provide sufficient resistance against mechanical impact unpleasant weather conditions. At same time, if it damaged, has break into smallest possible pieces, or, wherever possible, should remain intact on interlayer film prevent shards from...

The article deals with the effective design of vibro-diagnostics sources caused by self-excited vibrations a high-speed spinning headstock bearing generated residual unbalance, quality production and assembly components. It also analyses dynamic load from external vibration sources, primarily guide pressure pulleys drive belt, as well effect Eigen frequencies modes test equipment. suggests possibilities analysing bearings using diagnostic sensors it indicates calculation sound power level...

The research, of which this article is a part, deals with the design, implementation and verification methodology measuring transmission vibro-sound energy from contact tread profile rail through primary suspension blocks, side bearers, bogie pivot brake system to tank shell generation sound by wagon bogie. It analyses frequency distribution individual blocks (components) intensity vibration these until mounting shell. Using spectra, loss at maximum speed 120 km/h displayed. measurement...

The issue of functional cycle paths is a long-term pressing problem in Slovakia. Cycling combines many benefits that are related to healthy lifestyle, an environmental approach transport and, last but not least, the development given region. Construction modular on unused railway tracks one possible and modern approaches. total length Slovakia approximately 180-220 kilometers. This offers several benefits, such as meaningful use tracks, addressing legal aspects land use, recycling unusable...

Rapid Prototyping technologies are the fastest growing in manufacturing of components and parts. There many techniques which can be used with different materials purposes produced part. Gradually, systems have grown into Additive Manufacturing, because technology expansion brings faster production, improved manufactured components, expanded palette materials. So now this also for regular production special parts, where is usual change part design, necessary to produce variety designs shapes....

Purpose: This paper aims to present the results of study focused on assessment Industry 4.0 (I4.0) maturity level and adoption Quality (Q4.0) intelligent technologies in organisations operating automotive industry Slovakia (OEMs, Tier 1 2 suppliers). The serves as inputs for identification learning development needs.Methodology/Approach: background was a literature review quantitative research. I4.0 model published by PwC (2016) used study, while dimension elements were adjusted specifics...

The moisture content of densified biomass is a limit parameter influencing the quality solid biofuel. It influences its calorific value, density, mechanical strength and dimensional stability as well production process this paper deals with experimental research effect material on final biofuel in form logs. Experiments based single-axis densification spruce sawdust were realized by hydraulic piston press, where logs produced under room temperature. properties logs, including change...

Influence of wastes generated during juice production: apple, carrot and red beet, added to barley straw, on density pellet mass, hardness, ash content calorific value was assessed. Dry mass additives in the substrate production was: 0, 10, 20 30% mixture weight. The relative humidity raw material 17.0, 19.5 22%. Higher percentages higher moisture materials increased hardness pellet. contents natural polymers such as lignin, hemicellulose cellulose were determined primary used prepare...

Abstract The essence of the research is search for geometric, material and technological limits new concept spinning spindles. Considering trend introducing generation electric drives into segment high-speed spindles (over 120,000 rpm), it necessary to map describe basic physical connections, find dependencies correlations individual design parameters their a Due limitations original years-used spindle drive with belt requirement production development spun fibers, expand knowledge concept,...

Abstract High-chromium cast irons are used as abrasion resistant materials. Their wear resistance depends on quantity of carbides and the matrix supporting these carbides. The paper presents results chemical composition (in wt. %) 19–22 Cr 2–4.5 C alloyed by 1.7 Mo + 5 Ni 2 Mn to improve their toughness, which were tested in working conditions ferroalloys crushing. Tests showed that as-cast chromium with mostly austenitic achieved hardness 38-45 HRC, but relative Ψ ranged from 1.3 4.6, was...

Zemková, E, Cepková, A, Uvaček, M, and Šooš, L. A novel method for assessing muscle power during the standing cable wood chop exercise. J Strength Cond Res 31(8): 2246-2254, 2017-The study estimates repeatability sensitivity of a (a) maximal exercise with different weights (b) endurance core muscles. group 23 fit men performed effort single repetitions increasing stepwise up to 1 repetition maximum (1RM) set 20 at previously established weight which was achieved. Results showed that mean is...

Abstract The paper proposes two methods for determining the quality of industrially manufactured bearings, where vibro-acoustic energy is expressed by measuring vibration acceleration. determined criteria were verified and 100 % agreement was reached in required bearings. Unwanted bearing noise emissions its faults can be monitored over maximum acceleration value from time history, frequency distribution r.m.s. range.