Helical geometry as a superior solution
KNARR meets the challenge with a high-precision helical geometry that ensures reliable venting. “Even in our own mould making, we are repeatedly confronted with the difficulties of venting. The solutions available to date have all been less than ideal,” says Florian Schneider from KNARR’s technical sales department, explaining the reasons for the new approach.
Thanks to the helical geometry and the resulting unequal arrangement of the surfaces, we achieve significantly improved guidance of the ejector in the fitting bore and thus significantly lower wear, reports Florian Schneider. In addition to the convenient interchangeability with standard pins, he sees another major benefit: “Thanks to the high-precision manufacturing, we can guarantee the depth of the helical geometry of 0.02 mm over the entire length of the ejector pin. Cutting to finished size without creating a burr or even further outline machining is thus possible without any problem.”