Semi-finished products Plastic granules Special compounds

SawingThe band saw cut speed should be between 8 – 25 m / s,to avoid, with a lower speed, the creation of frayedcuttings.As tool material only metal or carbide tipped circular,for saw blades with a large enough tooth set, shouldbe used. The cleanest cut surfaces are obtained, whenCarbide tipped saw bladethe saw blade protrudes just few millimetres over theZEDEX ® high performance polymer sheet and whenits process is rapid. To avoid tears, with some of theZEDEX ® high performance polymer, it is necessaryto warm-up both the polymer and the saw blade (seetable 3, page 26). To obtain a better cut, it is recommendedto use, a saw blade with a pitch from 4 to6 mm.Grinding, polishingGenerally the ZEDEX ® high performance polymerscan be grinded and polished. Attention have to bepaid, to do not operate too high contact pressure andthus a high frictional heat on the surface. To grinda workpiece can be used commercial abrasive beltsand grinding discs, possible with a coarse grain size.A sufficient quantity of coolant should be used toavoid that the plastic particles close the workpiece´spores. However, it is always better using grindingdiscs with a coarse grain.To avoid heat accumulation, spreading of materialand cracks in doing deep holes, the drill bit shouldbe cooled, often ventilated and the shavings shouldbe removed. A guided pin twist-drill is used for holesbigger than 30 mm. A circle cutter can be used justfor thin sheets.It is recommended to pre-drill (ca. 10 – 20 mm) thesheets, if a big hole is required. To make holes in fullmaterial, it is necessary to use a properly sharpeneddrill and a warmed-up plastic. The warm-up temperaturesand times are in the table 3 on page 26.Non-observance of these parameters leads to a riskof injury and breaks.Deep holes, over 50 mm in diameter, are at bestexecuted pre-drilling the workpiece, and then usinga spotfacing and counterboring tool of the company“Rasmuc” e.g., or with a drill head of the company“Wohlhaupter“.Precision drilling holes are obtainable with two drilloperations; that means pre-drill, cooling, and makethe end drill hole.HSS twist drillsDrillingTo drill a ZEDEX ® high performance polymer is suitablea HSS (High Speed Steal)-drill bits according toDIN 1412, which is also valid in the metal processing.28 ZEDEX ® basic types ZEDEX ® families Post heattreatmentMachiningShippingoverviewSterilizationChemicalresistance