The deburring of articles made of carbon steel, from cutting by water or laser, can be approached in many cases with dry processes, using the correct combination of appropriate media. Rollwasch® has formulated processes that can also optimize this kind of finishing, for the highest level of quality of the results, keeping always in mind the high competitivity and simpliness.
Abrakem is a series of chemical accelerated deburring process. It is a isotropic process where the chemical compound operates a conversion on a surface infinitesimal film; while the media remove mechanically this film. This action, repeated “n” times during the cycle determines a favorable finishing surface and it respects both edges and geometry. It happens in two steps and the second one includes passivation and final polishing.
The ball burnishing is a wet process of micro hammering of the metal surface with suitable media in stainless steel (AISI-420-C) that determines the polishing.
Rollwasch® was the first company at the word to introduce this combined process with machines at very high frequency (3000rpm).
Blisk Surf is a specialistic branch of wave finishing process, specifically dedicated to the surface finishing of BLADED DISCS (aerospace, disc with turbine blades).
The need of special design tanks, special design robots and accessories, makes of Blisk Surf a peculiar specialization of Wave Finishing technology.
The great majority of the classic processes are wet processes, with plastic or ceramic abrasive media and with liquid chemical compounds (in some cases powder).
The DIA Finish processes are wet process and are carried out only with one vector media, usually porcelain, and with two or more cycle phases. Usually the first phase is carried out with one paste that has initially abrasive action, getting always finer and more polishing, while the second phase is carried out with a liquid detergent that makes the surfaces bright and very smooth.
The new processes DUROGAL, where properly applied, allow the 'closure' of the surface, towards a dry process, with improvements in the electrochemical process that can be optimized in the following aesthetic or economic results.
The Microfluid wet processes are made by means of special vector media (QF or in few cases, porcelain). The main feature is the low consumption of water, so low to be able to eliminate the water at every cycle instead of recycle it. This to avoid the typical problem connected to waste storage. One advantage of the Microfluid process with the QF media is the possibility to dry the pieces/media mass before the final unloading, with the only inlet of warm air.
QUATTROFINISH - QF
Quattrofinish or, most commonly QF, is a family of media on which are based many innovative process technologies.
One of the main characteristics of QF is the life time, which average is about 10 to 20 times longer than a classic «plastic» or «ceramic» media.
Roto Dry* is a series of processes that combines machine TEP, RotoTEP, RoboTEP, RDF or RSP, with media series QF (Quattrofinish) or DF (DryFinish), with eventual chemical compounds specifically formulated. The Roto Dry* finishing processes, therefore, provide a solution to optimize dry finishing, to be used with rotating tanks or centrifugal force machines, and result to be an alternative and competitive solution compared to traditional methods.
Drag finishing processes (Tep Finishing) allow to cross new boundaries of dry finishing, thanks not only to the friction developed in the machine TEP and Ipermatic TEP, which provides increased efficiency to the media, but also to Rollkemik products specifically formulated for these applications.
The Thermic finishing processes found their suitable application only die-casted brass parts and only in combination with machines developed for this purpose. The growth of heat due to the brass piece friction causes the removal of the joint mould line and to obtain a surface like the one of the grinded product with reduced costs and very high quality results.
WASH & DRY
The Wash & Dry processes are classic self tumbling process for small metal parts where the first step is about degreasing, pickling and eventually polishing process of the pieces while, the second step is about a combined cycle of dropping and hot air drying.
Finishing processes Wave Finishing allow to cross new boundaries of dry finishing, thanks not only to the centrifugal force in machines RoboTEP and Tep Rotomatic, which provides increased density to the media, but also to Rollkemik products specifically formulated for these applications.
To dry with SICOR vibratory dryers, full of fine ground corncob granulate, is one of the most common drying process.
The ground corncob is warmed up by a heating device, where the media is continuously passing through, during the process, absorbing the water drops from the workpieces and making a sort of massage over the surface, to prevent spots of mineral residuals, for a perfect result.
Habub is the name of a hot wind that distinguishes drying processes with vibro-dryers SICOR in combination with a particular type of plastic media granulate, or plastic polymer of small dimensions, series TECHNOPLAST. In this case in machines SICOR is blown hot air at a temperature constantly monitored by a thermostat, for a result of eccellent drying.
The processes of hot-air drying are generally used when it is not possible to use those with drying media, due to the possible inclusion of the same in holes or undercuts of the pieces to be dried. The range of machines that is most widespread is the one of the drying tunnels DRYTUN, but there are also archimede an screw dryers series ROTOROLL and static ovens of various types.
The drying of small metal parts of various kinds can also be done with centrifugal dryers of the series HYDROMETAL.