Liga, M  Jang, N  Atanu B

  Abstract

Direct-chill casting technique consists of the mould which cooled by water as well as can be closed by bottom block which placed at the closed at the bottom. Melt feed to the mould cavity from the top side and the bottom block is drawing the solid billet to the down, when the casting melt feed as well as speed rate were balanced in this way as in order to hold a constant melting level inside the mould. Moreover, the heat can be extracted to the billet solid part by water spraying onto the billet surface as it is already drawn down, and then the billet should be immersed into a water pit for more intensifying of the cooling. 

This project aimed to compare 6082 alloy manufactured through melt shear DC cast and Conventional DC cast in terms of ‎microstructure, property and heat treatability of the alloy to investigate if the new manufacturing ‎method improves the microstructure and property of the alloy.

  The  Experimental Investigation for Flexographic Printing Process 

Lasky, Y  Eduardo, M 

  Abstract

 In this project, the main focus was on the flexographic printing process. Among the invented conventional printing techniques, the flexography technology is considered as the newest one. It was known as Aniline printing. It’s very similar to letterpress since it prints from a relief image. This process is favorable since it produces images with high quality and this because it utilizes ink metering systems in addition to printing plates rather than the system of cast metal image carriers. In addition to its fast production, the Flexography is appropriate for the halftones production. One of the key features of this process is that it’s very sensitive to the print mix viscosity which influences the ding speed, solvent retention and coating weight [2]. This means that incompatible qualities of prints and pigment can be resulted if the viscosity is changed throughout printing [3]. From this, the vision of utilizing Graphene Nano Platelets (GNPs) ink in the Flexography printing will be analyzed in this study. It’s a carbon-based inks which delivers the feature of conductive coating.  

Therese, S   Jan, P  Crina, R

  Abstract

The energy generation is very important for different industrial application and urban usages. Most energy is generated in the world depends on fossil fuel which leads into many environmental impacts and issues such as; global warming and CO2 emissions. In the other hand, there are many sources of clean and renewable energy can be used to heat or cool different systems. In this research, the chemical heat of hydration and dehydration reactions was studied to be used in heating domestic air and water. The idea is to promote and control the hydration and dehydration of calcium chloride where the released heat during the reaction will be used to heat the ambient air inside a control volume or it can be used for water heating in the winter. The methodology of the research includes design and synthesizes the material and testing the ability of the system to heat air blowing over the reaction bed. It is worth mentioning that a process flow diagram of the rig was designed and the bed was sized based on chemical calculations. Using calcium chloride and vermiculite, a new solid material was synthesized and tested based on chemical calculations. The synthesized material was packed in a tested rig and both TGA and DSC approaches were followed to test the performance of new salt combination. The final testing show that the maximum air temperature can be achieved is 31°C using the synthesized salt. It is worth mentioning that the design constrain is to heat the air into 40°C or higher. This constraint was not met due to some assumptions during chemical reactions. The thermal analysis using DCS of the reaction of the new synthesized salt is endothermic where an amount of heat released and used for air heating.