AFS Foundry Sand Testing Equipment Operating Instructions Manual

RIDSDALE-DIETERTSHELL MOULD TRANSVERSE ACCESSORY (AFS) (cont’d)IIITEST PROCEDURE (cont’d)WITHOUT DELAY :-(f)(g)(h)Place the strike-off edge along the longitudinal centre-line of the mould and, holding itperpendicular to the mould surface, strike off the excess sand from the centre lineoutwards, first from one side, then the other.Place the filled mould in a suitable oven (or enclosed stove) for the appropriate time.Remove the specimens from the mould and allow to cool to room temperature.Check the thickness (¼ inch) of the specimens before testing.(i)(ii)The specimens can be tested on the Universal Sand Strength Machine usingthe Transverse Shell Strength Accessory. Read the “Dry Shear” scale andmultiply by 4 to give load supported by specimen in psi.The swivel knife edges in the Transverse Shell Strength Accessory can beadjusted to give loadings at 2 inch or 3 inch centres, and the fixed knife edgeis extended to allow for the thinner specimens.NOTE:It is important to remove the surplus resin bonded sand before sufficient heat haspenetrated through the split moulds to cause the surplus sand to coagulate and scorethe surface of the specimen when strickled off.IVMAINTENANCERemove any adhering sand from former plates after use.VRECOMMENDED SPARESPart No Description1401 RH Former Plate ) Supplied in pairs only.1402 LH Former Plate )100