adhering to the work piece In terms of surface finish, wet blasting promotes smoother finishes while being more precise, consistent, and repeatable. Finishes are fine and uniform, with low surface roughness of 100µm Ra being easily attainable. From a cosmetic surface finish perspective wet blasting creates a smooth matte effect, and the less abrasive nature of process and lack of warping and bending allows for the attainment of much tighter tolerances. A key advantage is the versatility of the process, as blast intensities and media concentrations can be easily adjusted to accommodate different materials and the different geometric structures to eliminate damage to part form and function. It is usually preferable to source wet blasting equipment form suppliers that have the knowledge and experience to advise on the numerous technical features that combine in a wet blasting process to ensure that you achieve precise and repeatable result on a wide variety of work pieces. As previously mentioned, depending on the specific wet blast process, the typical concentration of abrasive media in the slurry ranges from 10 to 40% by volume. Establishing the ideal concentration requires processing trials called a “wet out” surface that allows the optimal adhesion of paints or coatings. Changing media amount and blast intensity allows the effective cleaning and depowdering of a variety of plastic and metal AM parts with wet blasting. Often, AM parts have difficult to reach internal channels and complex geometries which are not well served by dry blasting technologies, but which are easily and demonstrably cleaned and completely depowdered using wet blasting. Summary While some companies expend huge resource on innovating bespoke postprocessing solutions for AM parts, industry is now waking up to the fact that a broad range of traditional finishing technologies can be easily adapted to post process AM parts. When looked at through the prism of exacting tolerance attainment, superior surface finish, applicability to delicate and geometrically complex parts, and repeatability, wet blasting is a compelling technology for the post-processing of AM parts and components while remaining adaptable and cost effective. www.solutions-for-am.com that are always best undertaken in collaboration with a technology expert. Wet blasting for Additive Manufacturing Wet blasting is an essential technology for various AM post processing tasks. Wet blasting cleans the 3D printed components by removing residual powder and significantly reduces their initial high surface roughness. It is capable of depowdering and providing general surface cleaning and initial surface smoothing from Ra 25 µm to 1–1.5 µm. The technology makes parts more homogeneous and therefore better prepared for effective mass finishing, which also takes less time once a part has been wet blasted. On metal AM parts the loosely sintered grains on corners are effectively removed. The wet process eliminates the worry about residual powder containment or sparking during the blasting process. Wet blasting can be applied to and provide numerous finishes to metal and non-metal parts alike. Different media and different blast intensity customises the surface finish achieved. In addition, many AM parts require coating or painting postbuild, and wet blasting creates what is Protection by recycled materials 30.000.000 pieces in stock Shipment in 48 h JOIN OUR GREEN EFFORT, FOLLOW THE CHANGE! W THE CHANGE! WWW.PLASCOMPO.COM UK DISTRIBUTOR 0114 349 0766 INFO@PLASCOMPO.COM
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