INVESTIGATION TO IMPROVE THE SAND MOLDING FORMULA OF THE ERG BY INCORPORATING LOCAL MATERIALS

In the field of molding, the use of a large quantity of sand from the beach causes an ecological problem for Algeria, plus its price which keeps increasing in the Algerian market leads to the search for solutions, to replace this type of sand which was nowadays among the first concerns of the country. Thus the proposal to substitute beach sand by the sand of Western ERG of Algeria gave satisfactory results presented on a first place as a simple and effective solution, knowing that this type of sand is in abundance and occupies nearly 6% of the surface of our country. The subject on which this work focuses is part of the problematic associated with the study of valorization of the sand of the ERG in the process of molding of parts and the investigation to the improvement of the sand casting formula of the ERG by incorporating local materials. However, the development of ERG sand has an economic and ecological impact for Algeria. Among other things, the addition of Bentonite in the molding formulation is an economic problem because this type of material is very rare, very expensive and is currently imported from abroad. Indeed, we want to improve the sand molding formula of the ERG by adding materials that replace the Bentonite to greatly reduce manufacturing costs in molding. The investigation in this area is relevant to our country.