AFS Foundry Sand Testing Equipment Operating Instructions Manual

RIDSDALE LABORATORY CORE TEST PIECE BLOWER (cont’d)IVSETTING UP READY FOR USEThe blowing machine must be firmly fastened to a strong level bench top so that it cannot bepulled over during the operation of opening and closing the die. As an alternative tofastening to the bench top, the machine can be bolted to a strong base board at least 750mm square.Connect the air inlet to a supply of compressed air at minimum pressure of 80 psi (6 bars)and maximum 250 psi (18 bars). The supply pipe should be as short as possible and haveadequate bore to minimise the pressure drop during the blowing operation.Connect the power plug to a suitable electric power supply.VINSTRUCTIONS FOR USESetting Up Die Ready for Use(a)(b)(c)NOTE: (d)(e)Check that the magazine is correctly positioned on the blow head.Place the die between the die heater plates and by means of the die positioningscrew and clamping screw, locate the die centrally beneath the sand magazine andnozzle. The positioning screw should be adjusted so that the die is firmly clamped bythe side plates when the clamping lever is in a position of 45 °C to the bench top.Adjust the backstop so that the magazine nozzle completely covers the die entrance.If the die is to be used HOT, release the clamp and reclamp very lightly. This actionallows for die expansion to take place during heat up.Set the temperature controller to the required temperature. The machine is ready foruse when the pre-set temperature shows on the digital display as described in theController’s Instructions.Filling the Sand Magazine(a)(b)(c)(d)NOTE: (d)(e)Raise the magazine by turning the positioning handle so that the weight hangsvertically.Unclip the magazine from the blowing head.Fill the magazine two-thirds full with shell moulding sand. Do not overfill.Fasten the magazine to the blow head.In all cases ensure that the faces of the magazine and blow head joint are cleanbefore fastening.To prevent overheating, the magazine should only be attached to the blow headduring the time that test pieces are being produced.61