scholarly journals Analysis of flow coefficient in chair manufacture

2005 ◽  
pp. 43-53
Author(s):  
Dragoljub Ivkovic ◽  
Slaven Zivkovic
Keyword(s):  
Manufacturing Process ◽  
Scientific Basis ◽  
Flow Coefficient ◽  
Basic Material ◽  
Production Cycle ◽  
Parallel Method ◽  
Process Duration ◽  
Complex Construction ◽  
Sawn Timber ◽  
Method Of Production

The delivery on time is not possible without the good-quality planning of deadlines, i.e. planning of the manufacturing process duration. The study of flow coefficient enables the realistic forecasting of the manufacturing process duration. This paper points to the significance of the study of flow coefficient on scientific basis so as to determine the terms of the end of the manufacture of chairs made of sawn timber. Chairs are the products of complex construction, often almost completely made of sawn timber as the basic material. They belong to the group of export products, so it is especially significant to analyze the duration of the production cycle, and the type and the degree of stoppages in this type of production. Parallel method of production is applied in chair manufacture. The study shows that the value of flow coefficient is close to one or higher, in most cases. The results indicate that the percentage of interoperational stoppage is unjustifiably high, so it is proposed how to decrease the percentage of stoppages in the manufacturing process.

scholarly journals (MOLDING DESIGN OF PADANG STATE POLYTECHNIC LOGO SOUVENIR MOLDING ON PRESSED PLASTIC INJECTION MOLDING MACHINE 1,960 KG / CM²)

2021 ◽  
Vol 16 (2) ◽  
pp. 93
Author(s):  
Alfian Alfian
Keyword(s):  
Injection Molding ◽  
Manufacturing Process ◽  
Plastic Injection Molding ◽  
Basic Material ◽  
Control Panel ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Plastic Molding ◽  
Injection Unit ◽  
Plastic Injection

ABSTRACT Padang State Polytechnic has been established since 1987 under the name Polytechnic Engineering and then changed its name several times to the management policy by Andalas University then, until now it is independent until now with the name Padang State Polytechnic. The 33-year-old polytechnic of the Padang State Polytechnic establishment must have an icon, symbol and trinkets that have PNP characteristics so that they are easy to recognize and remember. Souvenirs are a form of applying media for promotion and souvenirs for people who already know and come to Padang State Polytechnic. Plastic injection molding machine is a machine used to mold plastics with a basic material in the form of plastic pellets. Plastic injection molding machine is the process of processing plastic material in the form of seeds which are heated until they become liquid and then injected into the molding which then freezes / hardens according to the shape of the mold. The products produced by injection molding machines vary, from electronic tools, automotive tools, home appliances, plastic souvenirs, to tableware. The success of the resulting product is highly dependent on Molding. The plastic injection molding machine has parts, namely the Injection Unit, Molding Unit and Clamping Unit. The Injection Unit and Clamping Unit are the most important parts in the manufacturing process of plastic products where the control operation is executed on the control panel found on the plastic injection molding machine. The control panel on the machine can adjust the amount of clamping pressure, stroke length, plastic volume, and temperature used. The molding unit is the main part of the plastic product manufacturing process. Mold (mold) is a tool / tool used to make products according to the desired design (shape and dimensions). Plastic molding has its respective functions, parts of the mold, namely Cavity and Core, Sprue, Runner and Gate, Undercut. The printing process on a Plastic Molding machine has several stages such as the cutting process, mold safety and machine safety, execution, product check, setting, execution, and final. Materials used in the Plastic Molding process are usually materials that are often used daily and are safe for use by all groups, such as Polyproplene, Polycarbonate, and High Density Poly Ethylene. The product that will be produced from the molding made is a key toy souvenir made of plastic, with a shape like the Padang State Polytechnic logo, measuring 6 cm long, 6 cm wide and 5 mm thick. The test results obtained will be shown through field applications, socialization at the Padang State Polytechnic and writing in national journals are the targets and outputs of this novice lecturer research activity. Keywords— Mold, Souvenir, Cavity, Core, Pnp.

Research on the Calculation Method for Cement Manufacture Carbon Footprint

2013 ◽  
Vol 368-370 ◽  
pp. 968-975 ◽  
Author(s):  
Yu Feng Gan ◽  
Xian Ming Qin ◽  
Hong Guo
Keyword(s):  
Carbon Footprint ◽  
Calculation Method ◽  
Manufacturing Process ◽  
Scientific Basis ◽  
Calculation Model ◽  
Cement Industry ◽  
Fujian Province ◽  
Calculation Process ◽  
Cement Manufacture

To form a carbon footprint calculation method for cement manufacture, a detail analysis is conducted on the essential factors of the manufacturing process of the cement industry in Fujian Province. From the analysis result, the calculation model and calculation process for cement manufacture carbon footprint is formed to provide a scientific basis for the carbon footprint calculation.

Bioecosystem complexes for the solution of environmental, industrial and social problems (on the example of Azerbaijan)

2020 ◽  
Author(s):  
Nariman Ismailov ◽  
Samira Nadzhafova ◽  
Aygyun Gasymova
Keyword(s):  
Environmental Protection ◽  
Human Life ◽  
Practical Importance ◽  
Scientific Basis ◽  
Integrated System ◽  
Production Cycle ◽  
Practical Implementation ◽  
Modern Development ◽  
Social Environmental

A key objective of the modern development of society is the observance of ecological and socio-economic unity in human life and comprehensive improvement of environment and quality of life should be considered in close connection with the quality of the natural landscape. The formation of scientific understanding of the unity of society and nature is driven by the need for practical implementation of such unity. This defines the focus of this monograph. Given the overall assessment of the current state of the environment in Azerbaijan, considers the scenarios for the future development of the area. The prospects of the use of biotechnology in integrated environmental protection. In the framework of the above to address complex social, environmental and production problems in Azerbaijan developed scientific basis of integrated system of industrial farms — biclusters with a closed production cycle through effective utilization of regional biological resources, whose interactions and relationships take on the character of vzaimodeistvie components for obtaining focused final result with high practical importance. Microbiological, biochemical and technological processes are the basis of all development of biotechnology. Presents the development will help strengthen the ties between science and production, establishing mechanisms to conduct applied research in the field of innovation and creation of knowledge-based technologies in solving current and future environmental problems in Azerbaijan. We offer innovative ideas distinguishes the potential need for their materialization into new products, technologies and services, including the widespread use of digital technologies to design dynamic digital environmental map in space and in time. For students, scientific and engineering-technical workers, students and specializing in environmental technology, environmental protection.

scholarly journals On MEMS Reliability and Failure Mechanisms

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Daniel J. Fonseca ◽  
Miguel Sequera
Keyword(s):  
Health Care ◽  
Design Process ◽  
Manufacturing Process ◽  
Failure Modes ◽  
Microelectromechanical Systems ◽  
Failure Mechanisms ◽  
Production Cycle ◽  
Operating Cycle ◽  
Operational Failure ◽  
The Military

Microelectromechanical systems (MEMS) are a fast-growing field in microelectronics. MEMS are commonly used as actuators and sensors with a wide variety of applications in health care, automotives, and the military. The MEMS production cycle can be classified as three basic steps: (1) design process, (2) manufacturing process, and (3) operating cycle. Several studies have been conducted for steps (1) and (2); however, information regarding operational failure modes in MEMS is lacking. This paper discusses reliability in the context of MEMS functionality. It also presents a brief review of the most relevant failure mechanisms for MEMS.

Purification Efficiency and B Removal of Polysilicon during its Solidification from a Si-Al-Sn Melt

2013 ◽  
Vol 772 ◽  
pp. 68-71
Author(s):  
Shen Rui Wu ◽  
Fu Min Xu ◽  
Jia Yan Li ◽  
Yi Tan ◽  
Ya Qiong Li
Keyword(s):  
Low Cost ◽  
Basic Material ◽  
Production Cycle ◽  
Purification Process ◽  
Solar Grade Silicon ◽  
Segregation Coefficient ◽  
Purification Efficiency ◽  
Scale Size ◽  
The Subject ◽  
The Cost

Solar grade silicon (SoG-Si) is the basic material of photovoltaic industry. Metallurgical method as a way of purification isconsidered to reduce the cost of polysilicon production unanimously based on its low cost, short production cycle, relatively simple process, lowpollution and controllable scale size, and it has become a hot topic in the subject research around the world.In this paper Al-Si-Sn alloy is used to purifypolysiliconand influence on the purification efficiency of polysilicon with different compositions of Al-Si-Sn alloy is analyzed. In order to study the segregation of impurity B in purification process, we introduce final segregation coefficient kB,finaland analyze the relation between kB,finaland the content of Al,Snin Al-Si-Sn alloy thermodynamically.

Scientific Bases of Water Chemistry for Corrosion Control of NPPs by Integration of Radiation- and Electro-Chemistry

2013 ◽  
Author(s):  
Genn Saji
Keyword(s):  
Hydrogen Peroxide ◽  
Water Chemistry ◽  
Material Balance ◽  
Scientific Basis ◽  
Experimental Results ◽  
Basic Material ◽  
General Interest ◽  
Recent Theory ◽  
Radiation Chemical ◽  
Corrosion Science

In this paper, the author continues his investigation on the scientific basis of water chemistry specifications by applying his recent theory, which integrates the elemental radiation- and electro-chemistry reactions in the “Butlar-Volmer equation.” The B-V equation is well established as the basic material balance equation in corrosion science. The author’s new approach has been compared with the published in-pile test results of the electrochemical potential differences between the in-flux and out-flux regions for both the PWR- and BWR water chemistry environment. Although the theoretical estimation generally reproduced the experimental results, there remains significant deviation from the experimental results at the very low DH region (<10cc-STP/kg-water) in PWRs as well as the low DO region (<10ppb) in BWRs. Although these regions are outside of the water chemistry specifications of general interest, the scientific causes of the deviation must be clarified. In this paper, the author found that the deviations are due to the dominant radiation-chemical reactions involving hydrogen ions and hydrogen peroxide at the lower ends. Although the radiation- and electrochemical reaction was further exploited with respect to the potential differences induced by the hydrogen peroxide, the effects were disappointingly small, when estimated in terms of a mixed potential of the electrode reactions. This leads the author to suspect that hydrogen-ion-radical reactions should be the main causes. Currently further analyses are in progress.

scholarly journals TINJAUAN KERAJINAN BERBAHAN SABUT KELAPA DI SENTRA CREABRUSH DESA MULYOREJO KECAMATAN SUNGGAL DELI SERDANG

2020 ◽  
Vol 9 (1) ◽  
pp. 44
Author(s):  
Syaifah Mawaddah ◽  
Misgiya Misgiya ◽  
Wahyu Tri Atmojo ◽  
Sri Wiratma
Keyword(s):  
Qualitative Research ◽  
Manufacturing Process ◽  
Research Method ◽  
Sampling Technique ◽  
Basic Material ◽  
Qualitative Research Method ◽  
Purposive Sampling ◽  
Coconut Husk ◽  
Coconut Coir ◽  
Descriptive Qualitative

AbstrakPenelitian ini bertujuan untuk meninjau lebih jauh tentang jumlah bentuk yang dihasilkan, dan bagaimana perkembangan produk pada kerajinan berbahan sabut kelapa di Sentra Creabrush Desa Mulyorejo Kecamatan Sunggal Deli Serdang. Metode penelitian yang digunakan yaitu metode penelitian Deskriptif Kualitatif.  Populasi yang terdapat dalam penelitian ini sebanyak 5 karya kerajinan sabut kelapa. Sampel yang digunakan dalam penelitian ini terdiri dari  karya kerajinan sabut kelapa dengan menggunakan teknik Purposive Sampling yaitu teknik penentuan sampel dengan pertimbangan tertentu. Guna memperoleh data mengenai tinjauan terhadap kerajinan sabut kelapa di Sentra Creabrush Desa Mulyorejo Kecamatan Sunggal Deli Serdang. Setelah dilakukan pengumpulan data memalui instrumen penelitian observasi, wawancara dan dokumentasi, maka hasil penelitian menunjukkan bahwa proses pembuatan setiap kerajinan sabut kelapa pada Creabrush memiliki proses pembuatan yang berbeda-beda  tergantung dari jenis kerajinannya, dan bahan dasar sabut kelapa yang utuh atau diolah dulu menjadi lembaran atau coco sheet. Bentuk karya seni kerajinan sabut kelapa yang dibedakan berdasarkan fungsinya yaitu homedecor dan fashioncraft, dan sebagian karya seni kerajinan sabut kelapa di sentra Creabrush seperti lukisan, kaligrafi, sepatu, sandal dan tas mengalami perkembangan dalam peroses pembuatan dan hasil karyanya dari waktu ke waktu.Kata Kunci: tinjauan, kerajinan, sabut kelapa.AbstractThis aims of this study are for reviewing the shapesof  produced, and how the outgrowth in the  coconut coir craft produc at the Creabrush Center at Desa Village, Kecamatan Sunggal Deli Serdang. The method of the study is descriptive qualitative research method. The populations in this study contained by 5 coconut coir crafts. The sample of this study consisted of coconut coir craft by using the Purposive Sampling technique, which is a sample determination technique with certain considerations. For colleting the data of this study at coconut coir handicrafts at the Creabrush Center at Desa Mulyorejo, Kecamatan Sunggal Deli Serdang. After the process collecting the data through observation research instruments, interviews and documentation, the results of this study show that the process for making the coconut husk craft in Creabrush has a different manufacturing process depended by the type of craft itself, and the basic material of coconut coir itsel finclude processing the material first or no. The product of coconut coir craft divided by aech functions,  which are homedecor and fashioncraft, and some of coconut coir crafts whose works in the Creabrush centers such as paintings, calligraphy, shoes, slippers and bags has an  increase in the process of  making and also the products.  Keywords: enhancement, crafts, coconut coir.

Operational Cost Analysis of a Typical South African High Pressure Die-Casting Business

2014 ◽  
Vol 1019 ◽  
pp. 152-159
Author(s):  
Filipe Pereira
Keyword(s):  
High Pressure ◽  
Manufacturing Process ◽  
Die Casting ◽  
Cooling Water ◽  
Production Cycle ◽  
Cost Share ◽  
High Pressure Die Casting ◽  
Good Surface ◽  
Short Period ◽  
Pressure Die Casting

This paper looks at the issue and influence of the die cost on a typical Aluminium die casting business. High pressure die casting (HPDC) is a manufacturing process used to produce components in a near finished shape with a reasonable good surface aspect, dimensionally accurate and within a short period off time or production cycle. The die is at the heart of the HPDC business and is unique to each component to be produced. A full business analysis was done and the full die cost share was extracted as part of a life cycle inventory of the HPDC manufacturing process. The inventory accounted for the energy metal and other inputs flows through the foundry. Die casting uses significant quantities of energy, as well as materials like oil-based lubricants and cooling water. Costs associated with part finishing are also considered due to the direct link between die manufacture and design and resulting finishing operations required.

scholarly journals Increased efficiency of the functioning of systems for the restoration of military equipment by improving the organization of production and technological processes

2019 ◽  
Vol 9 (3) ◽  
pp. 127-136
Author(s):  
Bohdan Biliavskyi
Keyword(s):  
Production Process ◽  
Manufacturing Process ◽  
Production Cycle ◽  
Technological Processes ◽  
Military Equipment ◽  
Military Vehicles ◽  
Military Vehicle ◽  
Technical Control ◽  
Recovery System ◽  
Organization Of Production

The paper provides recommendations on improving the organization of production and technological processes for the repair of military equipment in assessing the effectiveness of the recovery system for this equipment. In assessing the effectiveness of the functioning of military vehicle recovery systems, measures must be taken to improve the functioning of this system. The manufacturing process is described by various indicators.Reducing the production cycle is one of the important tasks of organizing the production process and is ensured by improving the introduction of new equipment and technology, mechanization and automation of production in operations to restore parts for disassembling and assembling military vehicles, and technical control of the construction of the production process in accordance with the principles discussed in the article.

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