International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 04 | Apr-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET ISO 9001:2008 Certified Journal Page 2913 Determination of the Physical Properties of Sand Moulding Bonded with Composite of Ipomoea Batatas and Bentonite with Casting Application S. Priyadharsini 1 , P. Karunakaran 2 1 Assistant Professor, Dept. of Mechatronics Engineering, Sri Krishna College of Engineering and Technology Coimbatore, Tamilnadu, India 2 Associate Professor, Dept. of Mechanical Engineering, Erode Sengunthar Engineering College Erode, Tamilnadu, India Abstract - Nowadays all over the world face the silica sand scarcity problem. But traditionally the foundry field produces casting with sand moulding so in this research try to enhance the silica sand utility and also reduce the environmental pollution by using new organic binder Ipomoea batatas. The effect of the local binder named bentonite and Ipomoea batatas gum addition with silica sand was investigated in this study by varying binder concentration. Aluminium casting was produced by this research. Grain fineness of the sand and mechanical properties, such as green/dry compressive strengths and permeability were tested. The results show good properties when combining Bentonite and Ipomoea batatas binder and also good casting in non-ferrous metals when applied the optimum binder combination. Then the quality of casting was analyzed by hardness test, surface roughness test and ultrasonic test. Keywords— Foundry, Silica sand, Bentonite, Ipomoea batatas, Compression strength, Permeability, Casting, Ultrasonic test 1.INTRODUCTION Green sand moulding process has been traditional for long time, but it is common in practice because of its advantages. When investigated on Stress strain curve behavior of sample and also indicated that sample from naturally bonded sand has highest tensile strength with superior ductility. Best surface finish than cement mould. Impact strength is high when compared to cement and Co2 mould. For those reasons sand moulding was selected [1]. Silica sand is costly nowadays. So effectively using the silica sand is very much important. Foundry industry successfully run with may category of binders. But only some of the binders have reduced the production cost, environmental friendly and also giving good properties of moulding, good casting. When review all this points, the organic binder was introduced in this research named Ipomoea batatas. Previously some of the researches were conducted using starch based binders. Dry and green compression strength will increase with increase starch binder and shows good properties for casting non-ferrous metals [2-8]. And also Sweet potatoes having some good engineering properties those are the highest value of compressive strength [9]. That why Ipomoea batatas binder was selected for this research. Using only the starch binder was gave moderate physical properties so adding one more binder to enhance the physical properties of moulding; the sand gave good mechanical properties when bonded with kaolin or bentonite clay, with kaolin giving better bond properties. The mechanical properties analysis of the sand was compared to existing foundry standard and it was discovered to be very suitable to all types of non ferrous alloy castings [10-13] so here bentonite binder was added with Ipomoea batatas binder. Silica sand was collected at the place of river bed and the grain finesse number was found by sieve analysis test [14, 15]. The physical properties of moulding sand like permeability, green compression strength, and dry compression strength were tested [16]. Optimum binder combination was found by the testing methods and castings were done on the appropriate combination moulding. In this research aluminum was selected for the casting process. After the casting process, the quality of the casting was tested by the methods like hardness test, surface roughness test and ultrasonic test. 2. MATERIALS In this research, moulding sand preparation was done by three raw materials those are natural silica sand, bentonite and Ipomoea batatas. There are many types of moulding method available, but here green sand moulding method was selected.