AFS Foundry Sand Testing Equipment Operating Instructions Manual

RIDSDALE-DIETERTTENSILE RAMMING ACCESSORY (AFS) (cont’d)IVTEST PROCEDURE(a)Assemble the core box and find, by trial and error, the weight of sand required toform a test piece 1 inch thick (± 1 / 64 inch).Start by transferring approximately 100g of sand to the core box, roughly level thesurface, raise the ramming head using left-hand side cam, and place core box inposition on the rammer.(b)(c)(d)Lower the ramming head gently onto the sand. Ram with three blows. The tensiletolerance is marked by a 1 / 32 inch wide groove in the rammer shaft marked ‘T’. whenthe thickness of the rammed specimen is exactly 1 inch the centre of the groove willbe in line with the top face of the rammer frame top lug.Remove the core box assembly from the rammer, loosen the knurled screw andseparate the core box and test piece from the base. Place the core box on a flatdrying plate, rap lightly, and remove the two halves, taking care not to deform the testpiece.Dry or cure specimen and cool before testing.NOTE:The use of a Mould Release Agent will assist in the clean stripping of test pieces.48