Simple Solutions That Work! Issue 11

70 Casting defects on account of sand shall be < 0.3 %. This can be taken as a control plan for that pattern by the foundry and can be followed by the online testing system (VCAT- II) as acceptance criteria for a mold to be poured. V-CAT-II: THOU SHALT TEST EACH MOULD One such effort from Versatile enables users to progress towards 4.0. A testing system that can test sand as it falls in the molding machine to make a mold, record readings and do much more. above the molding machine is transmitting following parameters as sand is pulled in for each mold: • Compactability for that particular mold • Moisture for that particular mold • Permeability for that particular mold • Green strength for that particular mold • Temperature of sand at the time of molding • Running pattern number (acquired from molding machine) • Mold number for the pattern (acquired from molding machine) The database created on the server would connect this data based on common values such as pattern number and mold number and when casting rejection data is available a control plan can be established by an online analytical services (shown in fig 2). A typical analysis may look like the following example. For Pattern No: XYZ1123 When: • Squeeze pressure is between: 14-15 Bar • Compactability range is: 36- 38% • Moisture range is: 3.7-3.9% • Permeability range is: 280-300 • Green strength range is: 1.8-2.2 kg/cm2 • Temperature range is: 82-89 F Fig 2: Preparing for 4.0