Development of Novel Hot Chamber Rheo-Diecasting Process

2008 ◽  
Vol 141-143 ◽  
pp. 191-194 ◽  
Author(s):  
Jin Kyu Lee ◽  
Shae K. Kim ◽  
Young Chul Lee
Keyword(s):  
Grain Refinement ◽  
Molten Metal ◽  
Paradigm Shift ◽  
Metal Temperature ◽  
Furnace Process ◽  
Processing Equipment ◽  
On Demand ◽  
Additional Processing ◽  
Refinement Procedure ◽  
Cycling Time

Novel hot chamber rheo-diecasting process has been successfully developed. It requires no additional processing equipment except commonly used hot chamber diecasting machine, no molten metal control like grain refinement procedure and no additional cycling time to produce slurry-on-demand. Additionally, it could lower molten metal temperature in a furnace. Process concept of novel hot chamber rheo-diecasting is simply based on the paradigm shift from HOW to WHERE for producing slurry-on-demand. This paper will demonstrate the possibility to achieve slurry-on-demand by novel hot chamber rheo-diecasting and the advantages for 3Cs applications.

Development of In-Mold Rheocasting Process

2008 ◽  
Vol 141-143 ◽  
pp. 181-184 ◽  
Author(s):  
Shae K. Kim ◽  
Young Chul Lee
Keyword(s):  
External Field ◽  
Grain Refinement ◽  
Paradigm Shift ◽  
Commercial Products ◽  
Processing Equipment ◽  
On Demand ◽  
Development Direction ◽  
Additional Processing ◽  
Refinement Procedure ◽  
Cycling Time

Novel In-mold rheocasting, which can satisfy all the development direction of rheocasting, has been successfully developed. In-mold rheocasting requires no additional processing equipment except diecasting machine, no grain refinement procedure and no additional cycling time to produce slurry-on-demand. Process concept of In-mold rheocasting is simply based on the paradigm shift from HOW to WHERE for producing slurry-on-demand and the shift from obtaining PERFECT solid globules to casting OPTIMUM products. Optimum external field can be generated in mold, that is, in die cavity exactly around biscuit. This paper will demonstrate the possibility to achieve slurry-on-demand by In-mold rheocasting and some commercial products.

Radiometric Method for Molten Metal Temperature Measurements

1999 ◽  
Author(s):  
Y.B. Bragina ◽  
I. V. Bragin ◽  
V.P. Sgibnev ◽  
S.I. Bragin ◽  
I.A. Zheltikov ◽  
...  
Keyword(s):  
Molten Metal ◽  
Metal Temperature ◽  
Temperature Measurements ◽  
Radiometric Method

scholarly journals Pressing Control Design Based on Analysis of Metal Temperature and Flow in Sand Mold Press Casting

2018 ◽  
Vol 925 ◽  
pp. 491-498
Author(s):  
Ryosuke Tasaki ◽  
Hideto Seno ◽  
Kunihiro Hashimoto ◽  
Kazuhiko Terashima
Keyword(s):  
Molten Metal ◽  
Casting Process ◽  
Metal Temperature ◽  
Sand Mold ◽  
High Yield ◽  
Necessary Condition ◽  
Temperature Decrease ◽  
Velocity Control ◽  
Complex Shapes ◽  
Optimum Velocity

The sand mold press casting method is a novel iron casting process, which has developed by our group in recent years. The proposed method can cast iron into complex shapes with a high yield over 90% and produces high-quality products by filling control of molten metal during pressing motion. However, molten metal inside mold is cooled down by heat transfer to the molds and atmosphere, and often causes solidification before the end of press. Then, the pressing movement of the upper mold is blocked by the solidified metal. Therefore, to avoid the solidification during pressing sand mold, metal temperature must be heated properly to estimate the filling temperature decrease behavior based on analysis results of CFD simulator, FLOW-3D. The necessary condition not to solidify molten metal before the end of press has been found. It was made clear that the mold must be heated up to the necessary temperature beforehand in the pressing process. Furthermore, optimum velocity reference with specified pressure constraints has been designed to prevent casting defect such as penetration and also to minimize the temperature decrease. In this paper, optimum velocity control of servo cylinder considering the both of allowable pressure of molten metal and starting time of solidification is proposed by using a theoretical approach of Model Predictive Control: MPC method. The effectiveness of the proposed control system has been demonstrated by computer simulation and experiments using a laboratory scale machine with molten metal of casting iron.

Producing molten metal droplets with a pneumatic droplet-on-demand generator

2005 ◽  
Vol 159 (3) ◽  
pp. 295-302 ◽  
Author(s):  
Stewart Xu Cheng ◽  
Tiegang Li ◽  
Sanjeev Chandra
Keyword(s):  
Molten Metal ◽  
On Demand ◽  
Droplet On Demand ◽  
Metal Droplets

scholarly journals Change of Aluminum Alloys Structure by Sono-Solidification

2013 ◽  
Vol 13 (4) ◽  
pp. 39-42 ◽  
Author(s):  
S. Gnapowski ◽  
Y. Tsunekawa ◽  
M. Okumiya ◽  
K. Lenik
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Grain Refinement ◽  
Molten Metal ◽  
Ultrasonic Vibration ◽  
Silicon Content ◽  
Ultrasound Treatment ◽  
Ultra Sound ◽  
Eutectic Solidification

Abstract This experiment utilized five Aluminum alloys with silicon content percentages of 7, 10, 12.6, 14.5 and 17(wt)%. Ultrasonic vibration was applied to improve the quality of aluminum alloys. Sono-solidification, in which ultrasound vibrations are applied to molten metal during its solidification, is expected to cause improved mechanical properties due to grain refinement. Observed by microstructure photographs was that grains became smaller and their shapes more regular. Using ultra sound solidification α Al appeared during ultrasound treatment the eutectic solidification time was longest around 10% compared with same condition experiment without ultrasound treatment.

Grid, SOA and Cloud Computing

2011 ◽  
pp. 45-85 ◽  
Author(s):  
Mohamed El-Refaey ◽  
Bhaskar Prasad Rimal
Keyword(s):  
Cloud Computing ◽  
Grid Computing ◽  
Web 2.0 ◽  
Paradigm Shift ◽  
Application System ◽  
Grid Systems ◽  
On Demand ◽  
Enterprise Model ◽  
Key Concepts ◽  
Petascale Computing

In this chapter we are going to introduce the key concepts of SOA, grid, and cloud computing and the relation between them. This chapter illustrates the paradigm shift in technological services due to the incorporation of these models and how we can combine them to develop a highly scalable application system such as petascale computing. Also there will be coverage for some concepts of Web 2.0 and why it needs grid computing and the on-demand enterprise model. Finally, we will discuss some standardization efforts on these models as a further step in developing interoperable grid systems.

Effect of Molten Metal Temperature on Mold Filling in Evaporative Pattern Casting

2019 ◽  
Vol 13 (3) ◽  
pp. 611-617
Author(s):  
Toru Maruyama ◽  
Mitsuyoshi Tamaki ◽  
Gou Nakamura ◽  
Keisuke Nakamura
Keyword(s):  
Molten Metal ◽  
Mold Filling ◽  
Metal Temperature ◽  
Evaporative Pattern Casting
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