scholarly journals Friction and Wear between Polymer and Metal in the Mixing Process

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4029
Author(s):  
Yiren Pan ◽  
Lin Zhu ◽  
Huaqiao Liu ◽  
Meng Zhang ◽  
Wenwen Han ◽  
...  
Keyword(s):  
Service Life ◽  
Physical Properties ◽  
Friction And Wear ◽  
Alloy Coating ◽  
Mixing Process ◽  
Dispersion Process ◽  
Test Part ◽  
Mixing Chamber ◽  
Long Time

In order to obtain a longer mixing chamber life, a layer of hard alloy coating is generally welded on the surface. However, when the mixing chamber is used for a long time, the surface will be worn due to friction with small fillers and rubber. As a result, there will be a large gap between the mixing chamber and the rotor, which will further affect the quality of the mixed rubber. In this paper, the dispersion process of the reinforcing system is simulated at first, and the mixed rubber samples are obtained from different dispersion stages in preparation for experiments with the chamber material. On this basis, the friction experiment is carried out with the same material as the mixing chamber on the friction experiment machine employed in the improved test part. The experiment shows that the friction and wear between the mixture and metal produced in each mixing stage are different. The wear in the stage with high friction is not necessarily large. The wear will be intensified in the middle and later mixing periods, while the friction will tend to be stable. In this paper, besides the exploration on the friction of fillers and rubber on the mixing chamber in different mixing stages, the most important thing is to change the mixing process of rubber formula, so as to extend the service life of the mixing chamber without changing the comprehensive physical properties of the mixing rubber.

scholarly journals Effect of Adding MoDTC on the Properties of Carbon Black Rubber and the Friction and Wear of Metal during Mixing Process

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1071
Author(s):  
Yiren Pan ◽  
Deshang Han ◽  
Lin Zhu ◽  
Meng Zhang ◽  
Huiguang Bian ◽  
...  
Keyword(s):  
Carbon Black ◽  
Friction And Wear ◽  
Mixing Process ◽  
Rubber Compounds ◽  
Metal Wear ◽  
Mixing Chamber ◽  
Long Time ◽  
Filler Dispersion ◽  
Rubber Product

The gap between the rotor and the mixer chamber wall is an important factor in determining filler dispersion in rubber compounds. The inner wall of a mixer will wear after working for a long time, which will cause poor filler dispersion and affect the quality of rubber products. In this study, MoDTC was added to carbon black as a kind of filler, and the effect on filler dispersion, the properties of the rubber product, and the friction and wear of rubber and metal in the mixing process were examined. Experimental data showed that after adding 3 phr of MoDTC, carbon black dispersion was greatly improved, the curing time was shortened, and the performance remained stable. It was also found that the Mo element of the compound with 3 phr MoDTC dispersed better than that of the other compounds. Most importantly, adding 3 phr of MoDTC greatly reduced the amount of wear on the metal during the mixing process. However, the opposite effect occurred when the MoDTC content was high. The method proposed in this study can not only improve filler dispersion in rubber but also reduce metal wear to prolong the service life of the mixing chamber when applied to an actual mixing process.

scholarly journals Effect of the dough mixing process on the quality of wheat and buckwheat proteins

2017 ◽  
Vol 35 (No. 6) ◽  
pp. 522-531 ◽  
Author(s):  
Sluková Marcela ◽  
Levková Julie ◽  
Michalcová Alena ◽  
Horáčková Šárka ◽  
Skřivan Pavel
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Physical Properties ◽  
Mixing Time ◽  
Gluten Free ◽  
Mixing Process ◽  
Gluten Proteins ◽  
Buckwheat Flour ◽  
Scanning Electron

The changes in the structure of cereal proteins during the mixing of flour into dough was described and evaluated. Wheat gliadins and glutenins (gluten proteins) have unique physical properties and play an important role in breadmaking. The effect of mixing time on the formation and the structure of the gluten network was determined using scanning electron microscopy (SEM). Buckwheat flour (gluten-free) was used to compare the development of structure during the mixing process.

scholarly journals PENGARUH WAKTU PENGANGKUTAN ADUKAN BETON KE TEMPAT PENGECORAN TERHADAP KEKUATAN TEKAN

2019 ◽  
Vol 1 (2) ◽  
pp. 155-162
Author(s):  
Helwiyah Zain
Keyword(s):  
Compressive Strength ◽  
Time Delay ◽  
Casting Process ◽  
Mixing Process ◽  
Normal Concrete ◽  
Cement Ratio ◽  
Group I ◽  
Concrete Quality ◽  
Long Time

There is still a lot of casting concrete implementation which is mixing location was far with the casting location, because the situation in the field there are many obstacles to implement it.  As a result, from the mixing place to a casting place take a long time, so long as transportation there is a process of hydration in the concrete, which can cause a decrease in the quality of the concrete. To determine the decreasing of concrete quality, the research conducted is to determine the effect of time between when the mixing process of the concrete to casting process. This study used 48 specimens were divided into two groups, namely 24 specimens using the time difference without rotation and 24 pieces again with rotation. Each specimen using the same water cement ratio (fas), namely 0.45. Each group was subdivided in 6 variations in the time between mixing and casting namely :. 0 minutes, 12 minutes, 24 minutes, 36 minutes, 48 minutes and 60 minutes witch each variation using 4 specimens. The result of compressive strength each specimen group, for group I (without rotation) is 348 kg / cm2 for 0 minutes, 342 kg / cm2 for 12 minutes, 333 kg / cm2 for 24 minutes, 322 kg / cm2 for 36 minutes, 310 kg / cm2 for 48 minutes, and 294 kg / cm2 for 60 minutes. For group II (with rotation) is: 338 kg / cm2 for 0 minutes, 336 kg / cm2 for 12 minutes, 333 kg / cm2 for 24 minutes, 329 kg / cm2 for 36 minutes, 324 kg / cm2 for 48 minutes , and 318 kg / cm2 for 60 minutes. The results showed that, for the concrete without rotation: compressive strength at 60-minute time delay decreased by 15.52% of normal concrete (0 minute delay), and to the mixing concrete with rotation, compressive strength on delay of 60 minutes decreased by 5.92 % of normal concrete (0 minute delay). These results indicate that the delay time without rotation the greater the loss quality of concrete.

Tingkat Pemahaman Kompetensi Guru Pada Mahasiswa Pendidikan Geografi Sebagai Calon Guru Geografi

2020 ◽  
Vol 21 (1) ◽  
pp. 102-117
Author(s):  
Novia Zalmita ◽  
Muhajirah Muhajirah ◽  
Abdul Wahab Abdi
Keyword(s):  
Prospective Teachers ◽  
Prospective Teacher ◽  
Quantitative Description ◽  
Population Data ◽  
Geography Education ◽  
Teacher Competence ◽  
Education Department ◽  
Long Time

One that influences human resource indicators is education. The teacher is a profession as a job of academic specialization in a relatively long time in college. Understanding related to teacher competence is very important to have by a prospective teacher because it can affect the quality of performance as a professional teacher. The teacher's competence is known as pedagogic, professional, social and personality competencies. The issue in this study is how the competency of the teacher of the Department of Geography Education FKIP Unsyiah as a prospective teacher of geography? The purpose of this study was to determine the competence of teachers in the Department of Geography Education FKIP Unsyiah as prospective geography teachers. Quantitative description approach is used in this study to find answers to the issue. The population in this study were students of the Department of Geography Education FKIP Unsyiah class of 2015 and 2016 who had been declared to have passed the Micro Teaching and Magang Kependidikan 3 course totaling 50 people. Because the population is small and can be reached, the determination of the sample using total sampling techniques so that the sample in this study is the whole population. Data collection is done by distributing test questions to respondents. The data was analyzed using the descriptive statistics percentage formula. The results of the study indicate that the level of teacher competence of Geography Education Department students as prospective teachers is in the moderate category, namely as many as 22 respondents (44%). A total of 12 respondents (24%) were in the high category, 15 respondents (30%) were in the low category and 1 respondent (2%) were in the very low category.

Electrical Damage Due to Low Energy Plasma Processing of GaAs Structures

1991 ◽  
Vol 223 ◽  
Author(s):  
Hans P. Zappe ◽  
Gudrun Kaufel
Keyword(s):  
Chemical Processes ◽  
Low Energy ◽  
Electrical Behavior ◽  
Rapid Thermal Anneal ◽  
High Temperature Anneal ◽  
Significant Damage ◽  
Low Energies ◽  
Long Time ◽  
Physical Plasma

ABSTRACTThe effect of numerous plasma reative ion etch and physical milling processes on the electrical behavior of GaAs bulk substrates has been investigated by means of electric microwave absorption. It was seen that plasma treatments at quite low energies may significantly affect the electrical quality of the etched semiconductor. Predominantly physical plasma etchants (Ar) were seen to create significant damage at very low energies. Chemical processes (involving Cl or F), while somewhat less pernicious, also gave rise to electrical substrate damage, the effect greater for hydrogenic ambients. Whereas rapid thermal anneal treatments tend to worsen the electrical integrity, some substrates respond positively to long-time high temperature anneal steps.

PEMBENAHAN TERHADAP LEMBAGA PEMASYARAKATAN DAPAT MENIADAKAN OPSI HUKUMAN MATI BAGI NARAPIDANA DI INDONESIA (THE IMPROVEMENT OF QUALITY OF PENITENTIARY CAN ELIMINATE THE DEATH PENALTY OPTIONS OF CONVICTED CRIMINALS IN INDONESIA)

2020 ◽  
Vol 10 (2) ◽  
pp. 175
Author(s):  
Nomensen Freddy Siahaan
Keyword(s):  
Death Penalty ◽  
Deterrent Effect ◽  
Criminal Cases ◽  
Psychological Burden ◽  
The Real ◽  
The Public ◽  
Good Citizen ◽  
The People ◽  
Long Time

After a long time was not heard to the public area, lately death penalty toward the criminal cases that classified as extraordinary crime are appear. The author discovers electronic article about the execution of the death penalty which is the prosecutor prepares to execute death penalty toward the drugs dealer. The president of Republic of Indonesia stated that it is necessary to give a deterrent effect to the convicted  criminal and keep the morality of Indonesian teenagers. According to my opinion, the author argues that it will be better and wiser if we discuss about renovating all of the Penitentiary in Indonesia than debating whether death penalty could be done in Indonesia or not, because it will be displeasure many parties, death penalty infringed the human rights of the convicted criminals and cause psychological burden to them, families, the executor of the death penalty, and other parties. Because if we have to improve the quality of the Penitentiary, if the function of Penitentiary for fostering moralily has been optimal or properly enough to the convicted criminals, Indonesia will be no longer need the death penalty option as sanction to the convicted crimanals including for the extraordinary crime (especially for drugs trafficking in our country). Penitentiary is one of the public services which aims for fostering the people that initially have bad habits (commited to the crime), so that they will have the awareness to change their bad attitude into the be better ones, will not harm others, and positively contributed to the society. Already Penitentiary’s conditions should be designed in such a way and as good as possible, so that the inmates feels like at their own home (like having a second home after his own home), and feel humaner to spend their days in the Penitentiary. The author believes that if the Penitentiary has been improved and optimized its function well, then the real purpose of Penitentiary will definitely achieved. As stated in Law Number 12 Year 1995 regarding to Penitentiary Article 2 which states "sanction system are organized in order to fostering the convicted criminals in order to be the real man, aware of their fault, improve themselves, and not to repeat the criminal act so that they can be friendly received by the community, can actively participated in the development of our country, and can socialize themselves as good citizen."Article 3 on this regulation also intensifies the function of Penitentiary "the function of Penitentiary is to prepare convicted criminals to be able to properly integrated to the society, so they can be accepted again as members of the public who are free and responsible ones." 

Pengaruh Penambahan Air pada Pengolahan Susu Kedelai

2015 ◽  
Vol 4 (1) ◽  
pp. 8-13
Author(s):  
Priscillia Picauly ◽  
Josefina Talahatu ◽  
Meitycorfrida Mailoa
Keyword(s):  
Glycine Max ◽  
Physical Properties ◽  
Sweet Taste ◽  
Soya Milk ◽  
Randomized Design ◽  
Soybean Extract ◽  
Glycine Max L ◽  
Completely Randomized Design ◽  
Water Ratio

Soybean (Glycine max (L) Merr) is needed as an alternative diversification in order to increase protein consumption. Soybean can be processed into variety of foods and drinks. The most popular drink from soybean is soya milk which is made from soybean extract yielded from the addition of water. The amount of water added determine the quality of soya milk due to its effect on the chemical and physical properties of soya milk. This research was intended to find out the proper ratio of soybean and water in the processing of soya milk to yield the best quality. A completely randomized design was used with eight treatments of soybean and water ratio as follows, ratio of 1 : 6, ratio of 1 : 8, ratio of 1 : 10, ratio of 1 : 12, ratio of 1 : 14, ratio of 1 : 16, ratio of 1 : 18 and ratio of 1 : 20. Result showed the soybean and water ratio 1 : 10 in the processing of soya milk yielded milk having good quality according to its chemical with protein content of 2.53%, fat of 1.20%, sugar total of 1.60%, pH of 7.1, and organoleptic characteristies of both somewhat sweet taste and viscous texture.

BRUSH PHOSPHOR BRONZE

Alloy Digest ◽  
1986 ◽  
Vol 35 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Thermally Treated

Abstract BRUSH PHOSPHOR BRONZE is precision rolled and thermally treated to produce a material with consistent formability and properties. The product offers design advantages, improved service life and reduced fabrication problems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: Cu-516. Producer or source: Brush Wellman Inc..

OS CAMINHOS DAS ÁGUAS NO MUNICÍPIO DE CARIRÉ, CEARÁ, BRASIL

2019 ◽  
Vol 21 (2) ◽  
pp. 564-580
Author(s):  
Eloiza Rocha Queiroz ◽  
José Falcão Sobrinho
Keyword(s):  
Water Resources ◽  
Potable Water ◽  
Field Trips ◽  
Central Theme ◽  
Northeast Region ◽  
Brazilian Semiarid ◽  
Long Time ◽  
Short Rains ◽  
Two Stages

A região Nordeste do Brasil vem sendo alvo de medidas do Estado a mais de um século, na tentativa de solucionar o problema da falta de água em época de secas. O Estado do Ceará, por sua vez, apresenta boa parte de seu território inserido no semiárido brasileiro, uma região caracterizada pelo clima seco, com poucas chuvas e elevada evapotranspiração. A problemática da água existe há bastante tempo, principalmente o acesso em quantidade e qualidade suficientes para atender a população. O presente trabalho tem como tema central a questão dos recursos hídricos, com enfoque no abastecimento humano do município de Cariré, localizado na região noroeste do Ceará. Nosso objetivo consiste em apresentar um panorama de como atualmente a população carireense tem acesso à água potável. A metodologia adotada constitui-se em duas etapas: na primeira, realizamos levantamento de material bibliográfico e a segunda diz respeito a parte prática realizada em saídas a campo. Segundo a ONU, a água é um bem comum e que deve ser de acesso a todos, é um direito humano. Nesta perspectiva, o gerenciamento adequado dos recursos hídricos é essencial para a manutenção da qualidade de vida. Palavras-chave: Recursos Hídricos; Abastecimento Humano; Cariré-Ce. ABSTRACTThe pnortheast region from Brazil has been subject of measures for more than a century in attempts to solve the problems lack of water in dry season. The state of Ceará has a good part of its territorial inserted in Brazilian semiarid, a region characterized by dry climate, short rains and high evapotranspiration. The water issue has existed for a long time, mainly in a sufficient access of quantity and quality to serve the population. Then, this article has as a central theme the water resources focusing on water supply of the Cariré localized at Northeast region from Ceará. Therefore the purpose of the paper is to present a study about how the Carire’s population has had access to potable water currently. The methodology adopted to this research consists of two stages: Firstly it was carried out a survey of bibliographical material and secondly it concerned the practical part carried out in the field trips. In accordance to United nations, water is a commom good and it has to be available to everyone, it is a human rights. In that sense, the proper management of water resources is essential to keep the quality of life.Key-words: Human supply; Water resources; Cariré – Ce. RÉSUMÉLa région du nord-est du Brésil est la cible de mesures prises par l’État depuis plus d’un siècle pour tenter de résoudre le problème de la pénurie d’eau en saison sèche. L’État du Ceará, en revanche, présente une bonne partie de son territoire inséré dans le semi-aride brésilien, région caractérisée par un climat sec, avec peu de pluies et une forte évapotranspiration. Le problème de l'eau existe depuis longtemps, principalement l'accès en quantité et qualité suffisantes pour satisfaire la population. Le travail actuel a pour thème central la question des ressources en eau, en mettant l'accent sur l'approvisionnement humain de la municipalité de Cariré, située dans la région nord-ouest du Ceará. Notre objectif est de présenter un aperçu de la façon dont la population carioca a actuellement accès à l’eau potable. La méthodologie adoptée comporte deux étapes: dans le premier, nous procédons à une enquête sur le matériel bibliographique et le second à la partie pratique réalisée lors des visites sur le terrain. Selon l'ONU, l'eau est un bien commun et doit être accessible à tous, c'est un droit humain. Dans cette perspective, la gestion adéquate des ressources en eau est essentielle au maintien de la qualité de la vie.Mots-clés: Ressources en eau; Approvisionnement humain; Cariré-Ce.

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