Vestnik of Vitebsk State Technological University

7-11

Authors: Bashmetau Valery

The subject of research is the process of paying off the warp threads from the beam and ensuring the tension stability on the looms by means of friction warp regulators. The characteristics of the parameters that change during the paying off the warp threads from the beam and affect the static tension of the warp threads are shown in the paper. The purpose of work is the analysis of the effect of parameters changing on the changing of the thread tension during the paying off the whole warp from the beam. The calculations of the static tension of the warp threads by the different parameters in the conditions of fabric production with different density in weft allow to estimate the influence of the parameters on the stability of yarn tension. Results of work can be used to determine the optimal adjustment parameters for each specific configuration of the loom in order to reduce unevenness of the warp threads tension, increase productivity and improve the quality of the fabric.

21-26

Authors: Matveev Anton, Petjul' Irina, Medvedskaja Ekaterina

his article describes the design of the device for controlling the color fastness of leather to friction. The device is designed for inspection of color fastness on the finished shoes and leather products. The analysis of methods and devices for controlling of color fastness of leather to friction was conducted. The influence of the main metrological parameters of known devices was studied. The actuality of the problem of the leather color fastness control on the finished shoes and leather products is shown. The intensity of staining of adjacent textile materials was investigated. The parameters of the technical specifications for the design of the new device were defined. A new design of the device and method of testing were developed.

34-39

Authors: Naumenko Alexander, Sheremet Elena, Kozlovskaja Lyudmila

The influence of exploitation and technological factors on deformation state of sewing threads is investigated in this article. The following characteristics are used as the factors: work of thread extension during footwear lasting, time and speed of loading. Residual deformation is used as a measure of correlation between strain and deformation which first occurs in the thread during stitch lasting and during product exploitation further on. This measure is also used to estimate the deformation and strain state of sewing threads. On the base of the research results the simulation test of residual cyclic deformation with the use of dimension theory was fulfilled. The model of dependence of residual cyclic deformation on exploitation and technological factors is developed. This model can be used in the problems of footwear durability prediction made with the use of sewing thread junction.

49-53

Authors: Popok Nikolai, Maharinsky Yury, Latushkin Dmitry

Mathematical models have been analytically obtained to define the boundary algorithm parameters of duty cycle control of the flat plunge grinding. A large number of research works on various issues of the grinding process management are characterized by the absence of a single system approach to the problem, discord and the incompatibility of results. The real impact of these research works on the efficiency on the grinding process in a production environment is clearly not enough. The pilot and theoretical knowledge has not been streamlined yet. It has not been summarized by means of a pragmatic engineering theory that could make it possible to choose the reasonable control algorithm of the process and its parameters in each specific context. This especially refers to the flat plunge grinding process. The outstanding aspects of the flat plunge grinding process problem are the following: 1) the systematization and partial development of mathematical models of performance limitations; 2) the development of an analytical method of evaluating the boundary algorithm parameters of duty cycle control. For greater versatility studies were carried out in the dimensionless variables.

62-73

Authors: Vitiaz Petr, Senjut' Vladimir, Zhornik Viktor, Parnickij Aleksandr, Gamzeleva Tat'jana

The article presents the results of studies of the surface structure of diamond powders of different origin (ultrafine powders of diamond, micron powders of diamond of static synthesis, and powders of impact diamonds of Popigai crater) after prior modification by the sintering activators (silicon, titanium, tungsten). As a result of the thermal treatment in a protective atmosphere composite powders such as diamondtitanium (silicon, tungsten) are produced. The surface morphology of modified diamond powders is studied. The research results can be used for the further technology development of the composite and polycrystalline diamond materials.

82-89

Authors: Matveiko Nikolay, Braikova Alla, Busilo Ksenia, Sadovski Viktor

By stripping voltammetry determine the content of Zn, Pb, Cd, Cu and Hg in samples of medicinal plant raw drug and alcohol tinctures. Found that in all investigated samples of medicinal herbs and alcoholic liquors based on it most of all contains Zn. Cadmium in small quantities contained in samples of Valerian root, herb St. John's wort, grass motherwort and hawthorn fruit. In all samples studied medicinal herbs and alcoholic liquors in small quantities contains Pb, Cu and Hg. The content of Cd, Pb and Hg in all studied samples as a medicinal plant and their alcoholic liquors below the values specified by technical regulations of the customs Union 021/2011 for tea and by General Pharmacopeia article of the Russian Federation for medicinal raw materials.

99-104

Authors: Sakevich Valerij, Poskannaja Ekaterina

Work is devoted to industrial tests of a fat-free emulsol on samples of artificial knitted fur of Zhlobinsky JSC «Belfa». As a result of the conducted researches are received quality indicators on which impact exerts oiling of fibers namely: surface density of pile cover, surface density of jersey fabric, the mass of weakly-fixed fibers, surface resistivity, pile's resistance to fulling. Measurement results were com-pared with normative values of the indicators of quality, regulated GOST 28367-94. Designed in VSTU - at the department of physics and technical mechanics fat-free emulsol for sizing fibers in the manufacture of artificial fur in all indicators meet the regulatory indicators fur quality and fat-free emulsol can be recommended for use in the manufacture of artificial fur.

117-129

Authors: Vailunova Yulia

The analysis of foreign and domestic experience in the creation of integration structures, which allows to identify the patterns of development, is carried out in the article. Identification of the causes and factors contributing to the integration of the textile and clothing industry of the Vitebsk region has allowed to carry out the analysis of the institutional environment. Methods of networking in key areas of formation of competitiveness - education, innovation and marketing - are developed and validated.

140-151

Authors: Kvasnikova Vera, Yarmolenka Vasili

Method for evaluation of the efficiency of export business in organizations manufacturing cabling and wiring products was based on an analysis of existing approaches. the methodology is based on indicators characterizing the efficiency of export potential and reflecting the attractiveness of foreign markets. According to the proposed methodology efficiency of export business of «PO «Energokomplekt» in four foreign markets was evaluated.

165-172

Authors: Miniukovich Katsiaryna, Zhalezka Boris, Siniauskaya Volha

The retrospective analysis of formation of economic informatics as science and the directions of the higher education is carried out in the article. Classification of resources and services of international academic and scientific community in the economic informatics is presented. The emphasis is made to the analysis of foreign and national experience of education development in the field of economic informatics. Experience of higher education establishments of Russian Federation, Ukraine, Poland, Republic of Belarus is considered. As the result of the carried-out analysis, need of creation in Republic of Belarus of the academic community on economic informatics is proved, directions for cooperation of the Belarusian higher education establishments with foreign ones in the sphere of economic informatics are offered.

188-208

Authors: Yashava Halina, Kostuchenko Elena

The article gives a substantiation of application of the cluster approach as the factor of innovative development of national economy and increase of competitiveness. Problems of innovative development and competitiveness of the Belarusian economy are identified, d the essence of cluster is defined, the types of clusters in the economy are analyzed, the role of clusters in innovative development of the national economy is justified. As part of the identification of clusters in the Vitebsk region, the coefficients of localization of production in the region, per capita production and regional specialization are calculated and analyzed in the context of types of economic activities. Petrochemical, textile, leather and footwear potential clusters are identified. Basing on research findings, the main directions of organization of innovation and industrial clusters in the economy of The Republic of Belarus, including measures of state support of clustering and measures to ensure the cluster initiatives and cooperation are defined.