S. Velmurugan

Bio: S. Velmurugan is an academic researcher from Bannari Amman Institute of Technology, Sathy. The author has contributed to research in topics: Sand casting & Casting. The author has an hindex of 1, co-authored 3 publications receiving 1 citations.

Multi-objective optimization of western bentonite (Al2H2Na2O13Si4)-blended green sand casting process parameters to improve mould quality

Abstract: The quality of the mould in green sand-casting process plays a vital role to achieve good quality castings. In this research work, the main mould properties such as permeability and hardness are fo...

Review on ferrous and non-ferrous casting defects and their analysis

Abstract: The castings can be produced by using sand moulds and permanent dies. The rejection rate is more in sand casting process due to more number of process parameters. The papers reviewed about the defects occurred in the most widely used ferrous and non-ferrous materials such as cast iron, steel and aluminum are referred for this work. The defects are analyzed using various types of experiments, optimization techniques and software. This paper is useful to researchers and industrial persons to know about the tools available to analyze the defects and remedial action can be taken for the defects.

Optimization of Process Parameters to Reduce the Green Sand Casting Defects

Abstract: In this work, the mold-related sand casting defects are minimized by using the Taquchi optimization technique. The parameters considered are water content percentage, green compression strength (GCS), hardness of the mold, and molding sand particle size. The L9 orthogonal array is used to conduct the experiments. The outcome of this work leads to the sand casting foundry men to select the suitable level of process parameters to produce good quality castings. The improvement expected is around 8–10% reduction in mold-related casting defects.

Parametric analysis of mould sand properties for flange coupling casting

Abstract: In this research, the analysis of ramming factor, wall thickness, and quantity of additives powder have been considered on the permeability of mould which is used to make flange coupling cast. The data has been collected from the mould sand making industry using L27 orthogonal array. It was revealed from the analysis that the maximum permeability has been obtained from the lowest ramming factor, thin wall thickness, and minimum mixing of additives. The mould permeability number increased significantly to the proper allowability of gas from the mould cavity. The surface finish of the outer wall of the casting had been improved with minimum backpressure formation by increasing permeability number. The confirmation tests were conducted to validate the predicted process parameter on responses.

Pengaruh Variasi Campuran Bentonit Terhadap Karakteristik Pasir Cetak Untuk Proses Sand Casting

Abstract: The casting process is widely used because it has the advantage of being able to make products with small dimensions to very large dimensions, the use of materials is more efficient, the casting products can be directly used. However, in the casting process, the main triggers for the formation of defects are the nature of the mold, low permeability, low molding compressive strength, low sintering point, unsuitable sand grain distribution, so research is needed to obtain the right type of molding sand as a sand mold in metal casting. The only type of additive is bentonite. Bentonite can absorb water and expands between 8-15 times and remains dispersed in water for a certain period of time. This study aims to examine the effect of a mixture of variations of local bentonite and Australian bentonite on the characteristics of the molding sand for the sand casting process. The tests carried out are in the form of size distribution testing, X-Ray Diffraction, water content testing, compressive strength, and permeability measurements. Bentonite was varied into 5 variations of the mixture with a difference of 20% in each mixture. The results of the large size distribution of silica sand grains were 37.6 GFN. The results of XRD testing of local bentonite showed a higher content of calcium compounds and Australian bentonite contained higher sodium compounds. The largest water content test value is 5.825%. The largest compressive strength test value is 2.7 Kgf /cm 2 .