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Metal Casting Technologies : September 2006
85 CASTING METHODING AND SIMULATION Casting methoding or rigging involves three major decisions: (1) parting line, (2) feeder design, and (3) gating design. For casting orientation, the program considers the three coordinate axes, and suggests the direction in which the part has the least number and volume of undercuts. After selecting the orientation, the mould parting line is automatically generated to minimise the draw distance and draft volume. Feeder design mainly involves decisions regarding the number, location, shape and dimensions of feeders and feed-aids. Automated feeder design uses geometric reasoning to suggest the best location of feeder (closest to the hot spot, on a flat surface at the top or side, preferably a thick section to facilitate fettling). Its dimensions are calculated based on geometric modulus of the hot spot area, which is also automatically computed. Based on the dimensions, the feeder model is created and attached to the casting through an appropriately sized neck. The user may modify the dimensions of the feeder and model it again, and add more feeders, if necessary. Feed-aids such as insulating and exothermic sleeves and covers, and chills are semi-automatically designed: the user has to only select the location; program suggests the minimum dimensions, and creates the feed-aid model. D&E FOUNDRY LADLES ■ Designs for Precast Liners ■ Custom Spouts ■ Full Range of Standard Ladles ■ Ladles for Die Cast industry ■ Treatment Ladles ■ Quick Response Time SIMPLY YOUR BEST CHOICE For more information contact D&E Foundry Ladles A DIVISION OF TEEMARK CORP. 1132 Air Park Drive Aitkin Minesotta 56432 Email: firstname.lastname@example.org Website: www.teemarkcorp.com Te l : +218 927 2200 Fax: +218 927 2333 core design, feeding and gating design, and casting simulation. WHO'S WHO OF METALS -- ANNUAL 2006/7