TECHNICAL TOOLBOX ISSUE 57 TEST RESULTS Emerald EQC Part-1: 16.5 grams Emerald EQC Part-2: 13.5 grams Total Weight Weight Loss VOC EF Bowl, Blade, Sand 3759.5 g Bowl + Resins 3789.4 g After 2 min mixing 3789.2 g 0.20 g 0.13 After 30 min 3789.2 g 0.20 g 0.13 After 1-Hour 3789.1 g 0.30 g 0.20 After 2-Hours 3788.9 g 0.50 g 0.33 After 4-Hours 3788.9 g 0.50 g 0.33 After 6-Hours 3788.9 g 0.50 g 0.33 After 8-Hours 3788.8 g 0.60 g 0.40 After 24-Hours 3788.5 g 0.90 g 0.60 VOC EF8 = 0.40 lb VOC/ton of sand VOC EF24 = 0.60 lb VOC/ton of sand HOT DISTORTION IMPROVEMENTS Stepcones were made using a conventional system which used a sand additive, for vein reduction, of 0.75% in the sand mix. The Emerald EQC system did not use additives; it was only sand and resin. Resin percentages ranged from 0.8% to 1.4%. The resin percentage didn't affect casting results as expected. All stepcones cores were processed and evaluated. The results were highly comparable, leading to the conclusion that the new Emerald series could reduce or eliminate the need for sand additives without causing veining, therefore presenting cost reduction opportunities. Emerald EQC Conventional 0.75% with no sand additive 1% resin 55/45 1% resin 55/45 BULK CURE SPEEDS The new resin system has improved bulk cure speeds. This allows foundries to cure more cores in less time, increasing output and reducing costs. Traditional vegetable oil methyl esters are derived from Linoleic Acid, 55% soybean oil, which contain larger, and well-bent disruptive chains. The methyl esters used, were derived from Palmitic/Steric Acid-50%, and contain smaller, straight chains which are easier for Part-1 and Part-2 to align and easier for amine to go through.
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