AFS Foundry Sand Testing Equipment Operating Instructions Manual

RIDSDALE-DIETERTSHELL MOULD TENSILE 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)Ensure that the inserts have been fitted in the Tensile Core StrengthAccessory in order to centralise the Tensile Shell specimen.The Shell Mould Tensile specimens can be tested on the Universal SandStrength Machine. Read the “Dry Shear” scale and multiply by 20 to convertto psi 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 Description1601 RH Former Plate ) Supplied in pairs only.1602 LH Former Plate )102