scholarly journals Study of thermal resistance of cold mixtures with clay addition

2021 ◽  
Vol 316 (1) ◽  
pp. 91-97
Author(s):  
A. A. Alina ◽  
◽  
V. Y. Kulikov ◽  
P. V. Kovalev ◽  
A. M. Dostayeva ◽  
...  
Keyword(s):  
Technological Parameters ◽  
High Quality ◽  
Curing Conditions ◽  
Gaseous Products ◽  
Dispersed Medium ◽  
Experimental Laboratory ◽  
Steel Castings ◽  
Series Of Experiments ◽  
Kinetics Of

The article analyzes the results of heat resistance of cold-harmful mixtures with the addition of clay. The article presents the results of an experimental laboratory study of the properties of samples from CTS, obtained by various methods. The scientific novelty of the technology lies in the fact that the technology of casting in cold-rolled steel ensures high quality of the casting surface, the absence of gas defects and blockages in the casting. The selection of the composition and technological parameters for the manufacture of the mold, contributing to the production of high-quality defect-free castings, will significantly reduce their cost, which will have a positive effect on the economy of our country. The study of the change in density over time depending on the applied load was studied in a series of experiments. The density of the mixture was determined every thirty seconds during the entire time of the formation of the dispersed medium. These experiments showed that at the beginning of the formation of the shell, its density increases significantly. In works on the thermal stability of polymers, the general laws of thermal decomposition and carbonization of cyclic, spatially crosslinked hot curing polymers were investigated and it was shown that the kinetics of destruction, the composition of gaseous products, the amount of coke formed and its properties depend on the properties of the initial polymers - the degree of crosslinking of molecular chains, chemical structure, the presence of impurities of catalysts and other curing conditions, as well as the heating conditions - speed and temperature. The article summarizes some of the results of the study, which is most appropriate for thin-walled steel castings to use the following mixture composition: filler - quartz sand; binder - clay of the Kazakhstani deposit, epoxy resin, hardener.

scholarly journals Optimization of the design and technological parameters of an active ripper of a combined working body

2021 ◽  
Vol 37 ◽  
pp. 00068
Author(s):  
S. A. Ivanaisky ◽  
M. A. Kanaev ◽  
Y. A. Kirov ◽  
M. S. Ivanaisky ◽  
S. V. Denisov
Keyword(s):  
Soil Layer ◽  
Winter Period ◽  
Technological Parameters ◽  
High Quality ◽  
Quality Performance ◽  
Soil Cultivation ◽  
Surface Moisture ◽  
Tillage Operation ◽  
Working Bodies

The research objective is to improve the quality of soil loosening using combined working bodies for surface moisture-retaining soil cultivation. The efficiency of accumulation and conservation of precipitation in the autumn-winter period depends on the method of post-harvest soil cultivation. One of them is the autumn surface water-retaining treatment, which makes it possible to increase the efficiency of the processes of accumulation and conservation of moisture due to the deeper loosening of the cultivated soil layer. During loosening and mulching, the top layer of the soil contributes to the accumulation and preservation of moisture not only in the upper but also in deeper soil horizons. However, the used tillage tools do not fully solve the problem of the high-quality performance of surface moisture-retaining soil cultivation. The article presents the results of studies of the degree of influence of geometric and technological parameters of the additional active cultivator on the quality of surface tillage. Based on the results of the research carried out, the technological process of performing the surface tillage operation has been improved and combined working bodies have been developed for its implementation.

Nano-Precision Finishing Technology Based on Magnetorheological Finishing

2009 ◽  
Vol 416 ◽  
pp. 118-122 ◽  
Author(s):  
Yao Ming Li ◽  
Xing Quan Shen ◽  
Ai Ling Wang
Keyword(s):  
Surface Roughness ◽  
Advanced Technology ◽  
Technological Parameters ◽  
Magnetorheological Finishing ◽  
Shape Precision ◽  
Surface Destruction ◽  
Series Of Experiments ◽  
Precision Finishing ◽  
Better Than

Surface roughness is normally regarded as an important criterion for assessing the quality of optic elements; surface roughness of a high-quality optic element is required to be less than RMS1nm. In this paper, a series of experiments has been conducted on the sample magnetorheological finishing machine by using self-prepared magnetorheological liquid as finishing liquid, to assess the removing efficiency of magnetorheological finishing. Optimization of technological parameters enables the authors to obtain a glass-ware with an ideal surface roughness of RMS0.56nm. Magnetorheological finishing (MRF) is an advanced technology for processing optic elements that has been developed in recent years. The technology polishes optic elements by using viscoplastic soft media produced by the MRF liquid under the variation of gradient magnetic field. Better than traditional polishing method in shape precision, surface roughness and inner surface destruction, MRF is an ideal technology for obtaining super-precision optic surface.

The Research on Electroplating Technology Used for RF Micro Inductor Coil

2015 ◽  
Vol 645-646 ◽  
pp. 783-789
Author(s):  
Rui Ke Bi ◽  
Xiu Yan Wei ◽  
Jing Lin Wu ◽  
Hang Guo
Keyword(s):  
Ph Value ◽  
Coating Layer ◽  
Linear Sweep Voltammetry ◽  
Linear Sweep ◽  
Technological Parameters ◽  
High Quality ◽  
Pulse Electroplating ◽  
Inductor Coil ◽  
Plating Layer

In this paper, we focus on the electroplating technology used for RF micro inductor coil. The technological parameters in DC electroplating are determined by SEM, linear sweep voltammetry and so on. It turns out that a high quality of plating layer is obtained when the PH value of electrochemical solution is 9, temperature is 45°C,current density is 1 A/dm2, additive is added and stirred slowly. Then the research on pulse electroplating is conducted on the basis of DC electroplating, and the result indicates that the pulse plating layer is of better quality compared with DC plating layer. Afterwards, surface structure and resistance of the copper layer are analyzed, demonstrating the obtained coating layer is good enough to be the main structure of micro inductor coil. In the end, this electroplating technology is applied to micro inductor coil. The simulation, fabrication, package and test of micro inductor coil are introduced briefly.

scholarly journals IINFLUENCE OF MAIN TECHNOLOGICAL PARAMETERS OF DRYING ON QUALITY OF BAGASSE FROM CARROT AND BEET

2018 ◽  
Vol 5 ◽  
pp. 62-70
Author(s):  
Aziz Sardarov ◽  
Olga Mayak ◽  
Andrey Shevchenko ◽  
Svitlana Prasol ◽  
Gennadiy Shershnev
Keyword(s):  
Wide Spectrum ◽  
Chemical Properties ◽  
Quality Parameters ◽  
Drying Process ◽  
Technological Parameters ◽  
Process Duration ◽  
Healthy Nutrition ◽  
Kinetics Of ◽  
Food Value

The work studies the drying process of vegetable bagasse, namely of carrot and beet. There is studied the moisture content kinetics of vegetable bagasse and determined the dependence of the process duration on main technological parameters in the work of a vibration vacuum dryer, namely, an amplitude and frequency. There were studied quality parameters of obtained concentrated products, namely the colorimetric estimation of dried bagasse of carrot and beet. Based on obtained results of the study, it was established, that the use of vibration in the process of drying bagasse favors conservation and formation of colorimetric characteristics of a dried product. Determined color characteristics gave a possibility to establish, that at thermal processing it is very important to decrease the drying process duration and temperature. Research data proved prospects of producing concentrated products, namely, dried bagasse of carrot and beet by the offered method. It allows to regulate quality parameters of a ready product: color, brightness, consistence, viscosity and physical-chemical properties. Obtained concentrated products are characterized with high organoleptic indices, food value. This product may be used in the wide spectrum of food industry, such as, for example: juice supplement, stuff for confectionary mass, filling for confectionary products, as biological supplement for healthy nutrition.

scholarly journals The Influence of Sand Grains Properties on Electrical Properties of Moulding Sand with Inorganic Binder

2015 ◽  
Vol 15 (3) ◽  
pp. 43-46 ◽  
Author(s):  
B. Opyd ◽  
K. Granat
Keyword(s):  
Electrical Properties ◽  
Loss Factor ◽  
Water Glass ◽  
Basic Research ◽  
Technological Parameters ◽  
Effectiveness And Efficiency ◽  
Main Component ◽  
The Impact ◽  
Kinetics Of

Abstract The paper presents the results of basic research on the influence of the properties of sand grains on electrical properties of water glass moulding sands. It shows electrical properties of the main component – sand grains, crucial to the kinetics of moulding sands heating, such as permittivity εr and loss factor tgδ. Measurements were carried out with the use of the perturbation method for silica, chromite and olivine sands of different mineral, chemical composition and particle size distribution, as well as for moulding sands with water glass grade 145. Analysis of the results of measurements of electrical properties shows that all moulding sands are characterized by a similar permittivity εr and loss factor tgδ. It was found that the electrical properties and the quantity and quality of other components may have a decisive influence on the effectiveness and efficiency of the microwave heating of moulding sands with sand grains. In determining the ability to efficiently absorb the microwave radiation for mixtures which moulding sands are, the impact of all components influencing their individual technological parameters should be taken into account.

scholarly journals Investigation of the Process of Purification of Wet-Process Phosphoric Acid and Production of Concentrated Phosphoric Fertilizers Based on it

2021 ◽  
pp. 1-10
Author(s):  
Gulnoza Kodirova ◽  
Israiljon Shamshidinov ◽  
Boxodir Sultonov ◽  
Rikxsitilla Najmiddinov ◽  
Bakhodir Mamurov
Keyword(s):  
Calcium Carbonate ◽  
Phosphoric Acid ◽  
Technological Parameters ◽  
Phosphate Fertilizers ◽  
High Quality ◽  
Wet Process ◽  
Phosphorus Containing ◽  
Calcium Magnesium ◽  
First Time

Fluoride compounds have the most harmful effects on the environment. The main source of fluoride in the soil is phosphorus-containing fertilizers. Purification of wet-process phosphoric acid (WPPA) from fluorine will significantly reduce its content in phosphorous-containing fertilizers and improve the quality of the resulting products. The aim of the study is to reduce the content of fluorine and sulfates in the wet-process phosphoric acid by introducing calcium carbonate, dolomite or phosphorite into the finished extraction pulp before filtration and obtaining high-quality calcium and magnesium-containing phosphate fertilizers based on it. Phosphates were determined by differential photometric, fluorine – ionometric, calcium, magnesium, aluminum, and iron-complexometric, and sulfates-by weight methods. For the first time, scientifically-based data were obtained on the simultaneous reduction of the content of fluorine and sulfates in WPPA from phosphorites of Central Kyzylkum and the production of calcium-magnesium phosphate fertilizers based on it. Optimal technological parameters of the process of simultaneous defluorination and desulfatation of  WPPA from Central Kyzylkum phosphorites with calcium carbonate, dolomite and washed burnt phosphoconcentrate (WСPC) were found by introducing them into the second section of the extractor, into the finished extraction pulp in the amount of 100% for sulfate binding and 100-150% for fluorine binding, as well as obtaining high-quality products based on purified WPPA. The degree of transition of fluorine to the gas phase and phosphogypsum at a rate of 100-150% of calcium oxide for fluorine binding is 86.2-89.4% and its content in the wet-process phosphoric acid decreases from 1.18% to 0.22-0.29%. At the same time, the SO3 content in the acid decreases from 1.21% to 0.24-0.26%. The filtration rate of the sulfate-phosphate pulp varies slightly and is 807.6-812.6 kg/m2·h by dry residue.

A Fuzzy Self-Learning Control Method with Application to Hydroforming Processes

1995 ◽  
Vol 117 (3) ◽  
pp. 297-303 ◽  
Author(s):  
H. J. Park ◽  
H. S. Cho
Keyword(s):  
Tracking Control ◽  
Control Method ◽  
Learning Control ◽  
Design Parameters ◽  
High Quality ◽  
Control Scheme ◽  
Series Of Experiments ◽  
Quality Of Products ◽  
Self Learning

In this paper, a tracking control of hydroforming pressure which is used for precision forming of sheet metals, is considered. In this process, forming pressure of the process needs to be strictly controlled to ensure high quality of the forming products. However, conventional control method alone makes it difficult to achieve satisfactory control performance due to complexities and uncertainties of the process. To overcome this problem, a fuzzy self-learning control scheme is proposed. In the proposed scheme, a series of experiments were performed to show the effectiveness of the proposed control scheme and to investigate influence of the design parameters of the proposed algorithm. The experimental results show that the proposed fuzzy self-learning controller can guarantee good tracking performance and thus, high quality of products even when knowledge of the process is vague, imprecise and fragmentary.

scholarly journals The Effect of Growth Regulator Substance in Cultural Media PHM on Protein Content of Chlorella sp.

2007 ◽  
Vol 6 (1) ◽  
pp. 37
Author(s):  
M.W. Lewaru
Keyword(s):  
Life Cycle ◽  
Protein Content ◽  
Growth Regulator ◽  
High Quality ◽  
Chlorella Sp ◽  
A Value ◽  
Experimental Laboratory ◽  
The Media ◽  
Natural Foods

<p>In developing fish cultivation, it is better to make an effort to support a sustainable larva availability with the high quality and quantity. This is due that the larva stadium is a susceptible phase and the most critical condition in a whole fish life cycle. Hence, in obtaining a life cycle sequence and high quality of the fish, the most important thing to do is providing natural foods of the fish. One of them is <em>Chlorella</em> sp, this species has the size which is suitable to the orifice of the larva and it contains high nutrient such as protein. This research aims to investigate the effect of adding a growth regulator substance in cultural PHM media on the protein content of <em>Chlorella</em> sp.  The method used in this research was experimental laboratory using a completely random design which comprised of five treatments with triplicates per treatment. Treatments A (PHM + PSB 0.005 mL/L), B (PHM + PSB 0.01 mL/L), C (PHM + PSB 0.015 mL/L), D (PHM + PSB 0.02 mL/L), and K (PHM without PSB). Parameters observed and analysed were growth and protein content of <em>Chlorella</em> sp. During the study, parameters of the water quality measured were temperature (<sup>0</sup>C), pH, ammoniak, nitrit, and nitrat. The results of the study showed that adding a growth regulator Penshibao (PSB) in the media with various doses gave significant effects (P<0.01) on the protein content and growth of <em>Chlorella</em> sp. The appropriate dose for the highest protein content was found on treatment D (PHM + PSB 0.02 mL/L) with a value of 47.24%. While the best growth performance was shown by the treatment C (PHM + PSB 0.015 mL/L) with the top of population 7.46 log sel/mL and final density 6.87 log sel/mL.</p> <p>Keywords:  Growth regulator substance, media PHM, the growth of <em>Chlorella</em> sp, protein content.</p> <p> </p> <p>ABSTRAK</p> <p>Dalam pengembangan budidaya ikan, perlu dilakukan kegiatan yang mendukung adanya ketersediaan larva yang terus menerus baik dari segi kualitas maupun kuantitasnya. Hal ini disebabkan larva ikan merupakan masa yang paling kritis dalam rangkaian siklus hidup ikan dan sangat rawan terhadap kematian. Untuk itu dalam upaya mendapatkan kualitas dan tingkat hidup yang tinggi dari larva, maka salah satu faktor yang perlu diperhatikan adalah penyediaan pakan alami yang sesuai dengan ukuran bukaan mulut larva. Salah satu jenisnya adalah <em>Chlorella sp</em> yang mempunyai<em> </em>kandungan protein tinggi. Untuk itu dalam usaha budidayanya, perlu kiranya dilakukan pengkayaan media hidupnya yang sesuai agar pertumbuhannya optimal. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian zat pengatur tumbuh pada media kultur PHM terhadap kandungan protein <em>Chlorella sp</em>.  Metode yang digunakan dalam penelitian ini adalah eksperimental laboratoris dengan rancangan acak lengkap (RAL) yang terdiri dari 5 perlakuan dan 3 kali ulangan. Perlakuan A (PHM + PSB 0,005 mL/L), B (PHM + PSB 0,01 mL/L), C (PHM + PSB 0,015 mL/L), D (PHM + PSB 0,02 mL/L), dan K (PHM yang tidak diperkaya dengan PSB). Untuk parameter yang dianalisis meliputi pola pertumbuhan dan kandungan protein <em>Chlorella sp</em>. Kemudian sebagai parameter penunjang adalah kualitas air media kultur, yaitu : suhu (<sup>0</sup>C), pH, ammoniak, nitrit, dan nitrat.  Hasil penelitian menunjukkan bahwa pemberian zat pengatur tumbuh Penshibao (PSB) dengan dosis yang berbeda memberikan pengaruh yang sangat nyata (<em>P<0,01</em>) terhadap pertumbuhan dan kandungan protein <em>Chlorella </em>sp. Dosis yang terbaik untuk kandungan protein diperoleh pada perlakuan D (PHM + PSB 0,02 mL/L), yaitu 47,42% sedangkan pertumbuhan pada perlakuan C (PHM + PSB 0,015 mL/L), yaitu dengan puncak populasi 7,46 log sel/mL; dan fase kematian <em>Chlorella </em>sp pada hari ke-14 sebesar 6,87 log sel/mL.</p> Kata kunci:  Zat pengatur tumbuh, media kultur <em>Chlorella </em>sp.

scholarly journals Creation of an automated system for measuring technological parameters in the rubber production line

2019 ◽  
Vol 81 (3) ◽  
pp. 225-230
Author(s):  
V. S. Zhirkova ◽  
N. L. Kleymenova ◽  
O. P. Dvoryaninova ◽  
L. I. Nazina ◽  
S. V. Ershov
Keyword(s):  
Production Process ◽  
Technological Process ◽  
Production Line ◽  
High Performance ◽  
Automated System ◽  
Automation System ◽  
Rubber Compound ◽  
Technological Parameters ◽  
High Quality

The introduction of an automated control system on the production line of the rubber compound will reduce the influence of the human factor on the quality of rubber products, which will lead to a significant improvement in the operational and physico-mechanical characteristics of the final product. Also, the development of this system will create a centralized data collection system for creating reports on technological operations of the production process. To obtain high-quality products, it is necessary to control and maintain all technological parameters during equipment operation at the same level, modern means of registration and parameter management. In the production of rubber compounds, it is necessary to ensure a high degree of automation of the main technological equipment, which will make it possible to more accurately dose the ingredients, including dusting ones, to conduct the process in a given temperature regime for the time required to obtain high-quality products. The implementation of automatic control during the use of high-performance equipment is not possible without the use of measuring and control equipment. The article is devoted to the problem of automation of a system for measuring technological parameters on a rubber compound production line in order to improve the quality of manufactured products. The analysis of the technological process is carried out, the controlled parameters of not only the modes of the technological process, but also of raw materials, semi-finished products and finished products are selected. The choice of instruments and local automation equipment is presented, as well as the choice of an industrial microcontroller with which control is carried out at the lower level of an integrated automation system. A functional diagram of the automation of the rubber compound production process is proposed, which will allow to obtain a product with quality indicators corresponding to the regulated level.

scholarly journals High-Quality Gluten-Free Sponge Cakes without Sucrose: Inulin-Type Fructans as Sugar Alternatives

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1735
Author(s):  
Urszula Krupa-Kozak ◽  
Natalia Drabińska ◽  
Cristina M. Rosell ◽  
Beata Piłat ◽  
Małgorzata Starowicz ◽  
...  
Keyword(s):  
Sensory Quality ◽  
Control Sample ◽  
Total Sugar ◽  
Gluten Free ◽  
Technological Parameters ◽  
High Quality ◽  
Confectionery Products ◽  
Similar Appearance ◽  
Long Chain

Due to its structural and organoleptic functions, sucrose is one of the primary ingredients of many baked confectionery products. In turn, the growing awareness of the association between sugar overconsumption and the development of chronic diseases has prompted the urgent need to reduce the amount of refined sugar in foods. This study aimed to evaluate the effect of complete sucrose replacement with inulin-type fructans (ITFs), namely fructooligosaccharide (FOS), inulin (INU) or oligofructose-enriched inulin (SYN), with different degrees of polymerization on the technological parameters and sensory quality of gluten-free sponge cakes (GFSs). The use of ITFs as the sole sweetening ingredient resulted in the similar appearance of the experimental GFSs to that of the control sample. In addition, all GFSs containing ITFs had similar height, while their baking weight loss was significantly (p < 0.05) lower compared to the control products. The total sugar exchange for long-chain INU increased the crumb hardness, while the crumb of the GFS with FOS was as soft as of the control products. The sensory analysis showed that the GFS containing FOS obtained the highest scores for the overall quality assessment, similar to the sugar-containing control sponge cake. The results obtained prove that sucrose is not necessary to produce GFSs with appropriate technological parameters and a high sensory quality. Thus, it can be concluded that sucrose can be successfully replaced with ITF, especially with FOS, in this type of baked confectionery product.

Sign in / Sign up

Export Citation Format

Share Document