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ABSTRAC: THE FOUNDRY PROCESS OF METALLIC PRODUCTS IS CONSIDERED THE OLDEST OF THE CONVENTIONAL PROCESSES OF PRODUCTION, HAVING BEEN DEVELOPED IN AN EMPIRIC WAY THERE ARE THOUSANDS OF YEARS. IN SPITE OF ITS GREAT TECHNOLOGICAL IMPORTANCE, ONLY IN THE LAST DECADES THE FIRST SYSTEMATIC RESEARCHES APPEARED ON THE PHENOMENON OF THE SOLIDIFICATION OF METALS, MOTIVATED BY THE GROWING NEED OF THE USE OF NEW SUCH PROCESSES AS FOUNDRY UNDER PRESSURE, FOUNDRY CENTRIFUGES, FOUNDRY FOR MICROFUSION, CONTINUOUS CASTING, RHEOCASTING, ETC. THEREFORE, ONE OF THE OBJECTIVES OF THE PHYSICAL METALLURGY IN THE LAST YEARS IT HAS BEEN THE INVESTIGATION OF TECHNIQUES ABLE TO CONTROL THE DIMENSION, IT FORM, DISTRIBUTION AND ORIENTATION OF THE CRYSTALLINE GRAINS OF MELTED PRODUCTS, SEEKING THE OBTAINING OF STRUCTURES OF HOMOGENEOUS SOLIDIFICATION AND ISOTROPICS, COMPATIBLE WITH THE DEMANDED MECHANICAL PROPERTIES. THUS, THE MAIN OBJECTIVE OF THIS WORK IS TO PRESENT A THEORETICAL-EXPERIMENTAL STUDY ON THE EFFECTS OF THE DIMENSION OF THE MOLD AND OF THE VARIATION OF THE FLOW OF AN INERT GAS IN THE FORMATION OF THE AXIAL ZONE OF THE ALUMINUM. FOR SO MUCH, FIVE METALLIC MOLDS OF VARIABLE DIMENSIONS (HEIGHT, THICKNESS AND DIAMETER) ARE USED AS WELL AS FLOW OF THE INERT GAS CORRESPONDING TO ZERO, 0,2, 0,4, 0,6, 0,8 AND 1,0 L/MIN.
KEY WORDS: SOLIDIFICATION, DIMENSIONS, GRAINS, STRUCTURES E ALUMINUM.
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