AFS Foundry Sand Testing Equipment Operating Instructions Manual

RIDSDALE-DIETERT SPLIT SPECIMEN TUBE (AFS)IGENERAL PRINCIPLESA means of forming an AFS standard 2 inch diameter x 2 inch height specimen in sandswhich are very weak in the green state. This accessory also affords a convenient method ofpreparing and gassing AFS standard 2 inch diameter x 2 inch height specimens in SodiumSilicate/CO 2 sands.IIDESCRIPTIONThe accessory is a highly polished tube, split longitudinally, the two halves being heldtogether by means of hinged clamps and knurled screws.IIITEST PROCEDURE(a)(b)(c)(d)(e)Clamp the two halves of the tube, with identification marks together, ensuring thatthey fit properly and are not held apart by sand grains.Pass once over the specimen tube conditioner.Ram a specimen in the normal way using a bottom pedestal cup.Remove the tube and specimen from the pedestal cup and place on a flat dryingplate.Loosen the clamps, give a few light taps and remove each half carefully withoutdeforming the specimen.If using Sodium Silicate/CO 2 sands, remove the pedestal cup after ramming, transferthe tube and specimen to the CO 2 Gassing Accessory and gas the specimen.After gassing, loosen clamps and remove the two halves of the tube.51