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The success factors – Part 2 VEDIMAT The fully automatic online sand-testing system However, compactability is not affected by moisture alone. The sand composition and the bentonite saturation level are also crucial factors. Reducing costs by minimising scrappage The conceptual approach and technological implementation are crucial factors in relation to a successful outcome and whether the investment will be worth your while. Take a bet on the perfect combination of the two independent FoMaSys components, the VEDIMAT and the MICOMP UNI type G-CH. FoMaSys-Module FoMaSys-Modul � Identifying changes and taking gentle counter-action – before run into trouble The sand composition (i.e. the ratio of new, used and core sand, C-carriers, bentonite and other superfines) is permanently changing. In principle, the constant adjustment of the water requirement to the changing sand composition during the production process ensures that compactability automatically remains constant. By taking simple attendant measures, you yourself can further improve the level of precision. Ensure a constant composition and homogeneous distribution of the sand components by avoiding sudden, irregular additions during the sand cycle. Do your sand an enormous favour and act as follows with effort: Times and quantities of extraction and addition processes should be as equal and consistent as possible. � Avoid stress Short cycle times, high throughput and extreme, constant thermal loading place enormous stress on your moulding sand. There is barely enough time left for regeneration in bunkers, or there is not enough moisture in the bunkers to disperse the bentonite (at least 1.8-2.0%). If the sand fed to the mixer is too dry, full bentonite saturation is often not achieved before it leaves again the mixer. This results in major compactability fluctuations. And what can you do about it? Commence regeneration and conditioning early! Ideally in the cooler. Michenfelder Elektrotechnik GmbH & Co. KG info@michenfelder.com | www.michenfelder.com ONLINE SAND-TESTING SYSTEM
Sand conditioning reliability starts in the cooler 1.8-2.0% H2O T h e c r i t i c a l f a c t o r Breath life into your moulding sand MICOMP UNI The fully automatic moisture control system for type G-MC/G-91/G-FBK mixer coolers and fluidised bed coolers Even at the cooler and used sand bunker, the die for high casting quality and minimum scrappage at the moulding line has been cast. Fast mixers, a high throughput, short cycle and bunker storage times are a real challenge when it comes to manufacturing high quality moulding sand. However, tough general conditions and a soft, flowable, well-conditioned moulding sand are not mutually exclusive – providing the right processing technology and measurement and control systems are used. If the used sand moisture at the cooler outlet is below the critical level of 1.8-2.0% H 20, regeneration cannot take place in the used sand bunker. The active bentonite content does not disperse. The sand remains static and lifeless. Valuable regeneration time is lost and cannot be clawed back at a later stage in the mixer. There is then just barely enough mixing time to homogenise the aggregates, but hardly for satisfactory conditioning. The result: When it gets to the moulding line, dispersion processes have not been completed, the sand is not flowable, the mechanical sand properties are not constant and your scrappage levels are correspondingly high. Kill at least two birds with one stone Not only do you lay the foundation for flowable moulding sand, satisfactory casting and low scrappage levels when your used sand moisture levels are sufficiently high. There is also another highly beneficial by-product when it comes to your conditioning process. You provide support for your sand mixer and the loading is massively reduced. Unlike in the case of dry sand, the sand mixer can intermix the required amount of water homogeneously into the well pre-wetted sand much more quickly. In this way you can gain valuable conditioning time, save on energy and reduce wear and tear. Precise to the n th degree – and no need to worry about over-wetting If you want to reduce stress levels for yourself and your sand, integrate a precise and reliable moisture measurement and control system into your cooler. With the MICOMP UNI, achieving the critical limit values is child’s play and there is no need to worry about over-wetting and clogging up bunkers, conveyor belts and bucket elevators. Completely automatically – on Monday mornings, after every break and after a 100 hours of production. FoMaSys-Module FoMaSys-Modul Michenfelder Elektrotechnik GmbH & Co. KG info@michenfelder.com | www.michenfelder.com AUTOMATIC MOISTURE CONTROL SYSTEM FOR COOLERS
Page 1 and 2: BEST MOULDING SAND QUALITY FOR BEST
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