Hydraulic sealing systems compared

摘要

HOW IMPORTANT IS THE RIGHT CHOICE OF SEALING SYSTEM? ON THIS INJECTION MOULDING MACHINE, IT MEANT LEAK-FREE OPERATION EVEN AFTER OVER 2 MILLION DRIVING CYCLES. Cycle times are an efficiency factor for injection moulding mat limes. This explains why the cylinders that open and close injection moulding machines are subjected to such stress. Leakages in these hydraulic systems are totally unacceptable. Ferromatik Milacron, a renowned manufacturer of injection moulding machines, equipped one of its high-performance injection moulding machines (a K-Tec) with two different hydraulic sealing systems (each from a leading supplier of seals) with a view to comparing the two systems directly. In order to ensure that the sealing systems were subjected to exactly the same loads, one of the machine's driving cylinders was equipped with the sealing system from one manufacturer, and the other driving cylinder with the sealing system supplied by the second manufacturer. The leakage oil from each cylinder was collected separately.