Surface treatment Professional surface treatment and finishing, modular polishing course open for registration
Joke offers polishing courses, explains deburring technology.
The surface quality and surface accuracy of a moulding tool are crucial. They determine the quality of the final product and also influence service life, i.e. the tool's duration of use. For deburring, cleaning or shaping, users have a choice of different technologies. One of them is blasting technology.
The user generally chooses between the Venturi injector or compressed-air principle when blasting, surface technology provider Joke says. The injector system is suitable for very light or particularly heavy blasting shot, the company explains. It is closed and operates on a pressure of four to 6 bar. The blasting shot is drawn into the air flow by negative pressure and aimed at the workpiece to be processed. The injector principle offers further advantages: it is more economical and owing to a nozzle that ensures a higher discharge velocity of the blasting shot, a regular blasting result is achieved with low consumption. Hence, this system is employed for the majority of purposes in the processing technology, Joke says.
Various materials such as glass beads, mixed grit, silicon carbide or organic blasting media such as walnut shells or olive stones are used in the blasting shot. Differences in the blasting shot include shape, hardness and grit size, depending on the blasting pattern.
Furthermore, to precisely maintain a geometric form and to achieve a mirror finish with only minor surface roughness, polishing is the right surface treatment, Joke says. Professional surface finishing needs learning – which is what joke Technology is now offering with its new modular polishing course program. The modules are five in number, and participants can even learn and work directly on their own workpieces.