Numerical Study of Vacuum Casting DVD Panel Based on Silicon Mould

2010 ◽  
Vol 43 ◽  
pp. 707-711
Author(s):  
J. Yang ◽  
L. Xiao ◽  
Jian Zhong Zhou ◽  
Shu Huang ◽  
J.R. Fan ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Polymer Melt ◽  
Casting Process ◽  
Processing Parameters ◽  
Mould Temperature ◽  
Melt Temperature ◽  
Vacuum Casting ◽  
Study Process

As a new fabrication technique based on rapid prototyping, vacuum casting process can be especially used in the stage of products development. In this paper, a self-designed and made silicone mould was used to study process of vacuum casting panel part. ProCAST software was adopted to analyze the melt flowing behavior and effects of processing parameters. The key vacuum casting parameters, such as mould temperature, melt temperature, degree of vacuum and coefficient of heat transfer, on the effects of the filling rate of polymer melt were emphasized to be numerical studied. The results indicate that mould temperature and coefficient of heat transfer have the most important influence on quality of the formed panel.

scholarly journals Effect of Mould and Melt Temperature on the Properties of Styrene Acrylonitrile Moulded Parts

2018 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Cahyo Budiantoro ◽  
Adi Nugroho
Keyword(s):  
Temperature Difference ◽  
Mold Temperature ◽  
Processing Parameters ◽  
The Other ◽  
Mould Temperature ◽  
Melt Temperature ◽  
Injection Speed ◽  
Other Hand ◽  
Styrene Acrylonitrile

The quality of injection moulded parts can be influenced by processing parameters. The effect of mould temperature and melt temperature on the weight and shrinkage of Styrene Acrylonitrile moulded part was observed in this research. It was found that by increasing mold temperatures at constant melt temperature and injection speed, the weight of the part decreased and the shrinkage value slightly decreased. On the other hand, by increasing melt temperature at constant mold temperature and injection speed, the part weight increased. Both mold temperature and melt temperature gave only a small effect because the temperature difference was not too large.

Investigation of Fiber Diameter in Spunbonding Process via Mathematical Modeling

2010 ◽  
Vol 33 ◽  
pp. 567-570
Author(s):  
Bo Zhao
Keyword(s):  
Mathematical Modeling ◽  
Heat Capacity ◽  
Constant Pressure ◽  
Fiber Diameter ◽  
Polymer Melt ◽  
Processing Parameters ◽  
Air Velocity ◽  
Melt Temperature ◽  
Throughput Rate ◽  
Primary Cool

The polymer air-drawing model of polypropylene (PP) spunbonding nonwovens has been established. The influence of the density and the specific heat capacity of polymer melt at constant pressure changing with polymer temperature on the fiber diameter have been studied. The effects of the processing parameters on the final filament fiber diameter have also been investigated. A lower polymer throughput rate, a higher polymer melt temperature, a higher primary air temperature, a higher primary cool air velocity, and a higher air suction speed can all produce finer fibers, while fiber diameters first decrease with increases in the venturi gap and then increase with increases in the venturi gap.

Using Simulation to Improve the Quality of the Metallic Industrial Components Made by Rapid Casting

2015 ◽  
Vol 808 ◽  
pp. 187-192
Author(s):  
Alina Popan ◽  
Nicolae Bâlc ◽  
Alexandru Popan ◽  
Nicolae Panc ◽  
Cristina Stefana Borzan
Keyword(s):  
Surface Defects ◽  
Casting Process ◽  
Complex Geometries ◽  
Thin Sections ◽  
Vacuum Casting ◽  
Rapid Casting ◽  
Casting Technology ◽  
Small Series ◽  
Complex Shapes

Industrial parts with complex shapes are characterized by thin sections and complex geometries. Rapid vacuum casting is an ideal technology to manufacture complicated parts in small series production or prototypes. Contributions regarding simulation and analyzing of the parts made by rapid vacuum casting technology are presented in this study. Using dedicated software for simulating the casting process was analyzed and optimized the time of casting, the complete filling with material and also reducing the surface defects.

Numerical Simulation on the Microstructure of Small Electroslag Remelting Ingot

2011 ◽  
Vol 117-119 ◽  
pp. 1740-1743
Author(s):  
Jun Ping Yao ◽  
Zhong Sun
Keyword(s):  
Heat Transfer ◽  
Radial Direction ◽  
Casting Process ◽  
Electroslag Remelting ◽  
Metal Pool ◽  
Technological Parameters ◽  
Pool Profile ◽  
Columnar Grain ◽  
Grain Size And Orientation

The technological parameters determine the metal pool profile and the grain size and orientation in the electroslag remelting process, and thus affect the quality of the final ingot. The microstructure in the small electroslag casting process was simulated by CA method by means of the software MATLAB. Along with the remelting process, the columnar grain begins to grow to certain angle with axles, the shape of the metal pool gets closer to paraboloid shape. Improving the slag pool temperature or increasing the coefficient of heat transfer at the bottom or decreasing the coefficient of heat transfer at the side can lead the axial trend of grain growing to increase and the depth of the pool to shallow, otherwise can lead the trend of grain growing to radial direction to increase and the depth of the pool to deep.

Computer Simulation of Fluid Flow, Heat Transfer for the Production of Cu Thin Wire by OCC Process

2009 ◽  
Vol 620-622 ◽  
pp. 375-378
Author(s):  
Kyung Wook Jang ◽  
Jung Il Lee ◽  
Joo Ho Lee ◽  
Kyoung Won Cho ◽  
Good Sun Choi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Temperature Distribution ◽  
Flow Pattern ◽  
Casting Process ◽  
Mold Temperature ◽  
Design Parameters ◽  
System Construction ◽  
Thin Wire ◽  
Melt Temperature

In the present study, the fluid flow and the heat transfer with solidification analyses for the Cu thin wire production by OCC (Ohno Continuous Casting) process. The OCC process is widely used to produce cylindrical column castings continuously, a number of researches have been focused on the OCC process. However, few researches on the production of Cu thin wire by the OCC process have been reported, therefore it is necessary to investigate and optimize the process variables of the OCC process when producing the Cu thin wires. A commercial multiphysics software was used to analyse to the flow pattern and the temperature distribution in the OCC system proposed in the present study. Effect of the casting speed, the OCC mold temperature, the melt temperature on the castablility of the thin Cu wire and flow pattern and temperature distribution of the melt were discussed. It is expected that the present study is able to give the design parameters of the OCC system for production of Cu thin wire before the actual OCC system construction.

Numerical Simulation and Die Casting Process for Cylinder

2012 ◽  
Vol 490-495 ◽  
pp. 2362-2365
Author(s):  
Yong Huang ◽  
Yue Dong ◽  
Xiao Ming Du
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Temperature Field ◽  
Die Casting ◽  
Casting Process ◽  
Processing Parameters ◽  
Mould Temperature ◽  
Pouring Temperature ◽  
Die Casting Process ◽  
Filling And Solidification

Filling and solidification for aluminum alloy packing block in die casting were simulated by numerical simulation. Distribution and change of temperature field as well as velocity field were visualized. The desirable processing parameters can be obtained with pouring temperature of 620°C and mould temperature of 180°C as well as shot velocity of 4m/s. The qualified products were obtained on the basis of the optimized die-casting parameters.

A Numerical Study of Micro Hydro Deep Drawing of SUS304 Sheets

2016 ◽  
Vol 846 ◽  
pp. 524-529 ◽  
Author(s):  
Liang Luo ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei ◽  
Hideki Sato ◽  
Tsuyoshi Furushima ◽  
...  
Keyword(s):  
Deep Drawing ◽  
Numerical Study ◽  
Processing Parameters ◽  
Hydraulic Pressure ◽  
Micro Forming ◽  
Shape Accuracy ◽  
Micro Electro Mechanical Systems ◽  
Material Inhomogeneity ◽  
Novel Technology

Micro forming is a promising technology and has drawn global attentions due to the urgent requirements on miniaturised products. Micro hydro deep drawing (MHDD) is a typical micro forming method and its products are widely applied in various fields, such as micro electro-mechanical systems (MEMS), medical and aerospace areas. However, tiny sizes of both products and tools are obstacles to investigate this novel technology. Therefore, finite element method (FEM) is adopted and modified to study the influence of processing parameters on micro drawing process and produced products. In this study, a normal hydro deep drawing model was developed, and then a voronoi blank model was generated to consider the size effects of materials. Additionally, a surface layer model was created based on the voronoi blank model. Therefore, the open and closed lubricant theory can be fulfilled and friction behaviour in MHDD can be considered. Subsequently, different processing parameters, such as hydraulic pressure and material inhomogeneity, were investigated. Simulation results indicate that a proper hydraulic pressure improves drawability and shape accuracy of the drawn cups. Moreover, material inhomogeneity affects the quality of drawn cups.

scholarly journals The Effect of Melting Temperature Aluminum Metal Casting Using Mixed Degasser Based Sodium Fluoride and Sodium Nitrate

2019 ◽  
Vol 269 ◽  
pp. 07001 ◽  
Author(s):  
Donanta Dhaneswara ◽  
Jaka Fajar Fatriansyah ◽  
Raffi Ramadhan ◽  
Ahmad Ashari
Keyword(s):  
Mechanical Properties ◽  
Hardness Test ◽  
Casting Process ◽  
Melting Process ◽  
High Solubility ◽  
Pouring Temperature ◽  
Melt Temperature ◽  
Microstructure Observation

The effect of NaF and NaNO3 based degasser on mechanical properties of Al-Si 12% casting has been investigated. The quality of Al-Si casting, especially in mechanical properties, is important in some applications. However, the existence of gas porosity, which is formed due to the high solubility of H2 at melt temperature in casting process, reduces mechanical propertis of Al-Si 12% casting product. In this research, we used NaF and NaNO3 as degasser as an addition in casting process. The experiments were conducted at pouring temperature of 660°C, 680°C, 700°C and 720°C. The mechanical properties (which are determined by tensile test, hardness test and impact test) with and without degasser were measured and compared. We found that in all pouring temperature, the addition of degasser will improve all of mecahnical properties measured. In addition we found that the increase of tensile strength was optimum at pouring temperature of 720°C at 25,5 % of increase, hardness was optimum at pouring temperature of 720°C at 33,3 % of increase and impact strength was optimum at pouring temperature of 720°C at 25 % of increase. The improvement of mechanical properties is due to the role of NaF and NaNO3 by binding H2 gases which is formed in melting process. This H2 binding was shown in microstructure observation which shows that the porosity of casting product visually decreased.

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