User manual HUSKY FL-HOTRUN-10-25

[. . . ] Hot Runners Performance, application flexibility and reliability FROM CONFIGURABLE PRONTO SYSTEMS TO CHALLENGING CUSTOM STACK AND MULTI-MATERIAL SYSTEMS, HUSKY HAS A SOLUTION FOR YOUR APPLICATION. Our commitment to development has led to new technologies that help reduce our customers' operating costs. UltraFlow melt mixing homogenizes the melt, improving part quality and color change time. And new advances in nozzle tip design and materials provide wider operating windows and longer service life. Two dedicated hot runner manufacturing facilities, in Dudelange, Luxembourg and Vermont, U. S. A. , provide competitive lead times to our global customers. [. . . ] Valve gate stack shown on top and thermal tip stack shown below. 4 Hot Runners SIMPLIFIED OPERATION DELIVERS IMPROVED RELIABILITY Ultra nozzles make valve gating simple. Key features of the Ultra valve gate's actuation are: · A single o-ring operating in the cooled backing plate more than doubles seal life and maintenance interval · Ability to valve gate higher temperature materials such as PEEK and Polysulfone (PSU) · Large airflow access holes allow for fast valve stem actuation times providing better part quality and consistency · Valve stems are easily replaceable in the machine A single o-ring operates in a cooled backing plate, extending seal life and maintenance intervals. GUARANTEED LEAKPROOF All Ultra nozzles feature the UltraSeal spring to preload the nozzle to the manifold. UltraSeal prevents leakage at start-up, even if the hot runner is not at proper operating temperature. We guarantee it for three years on complete sytems. UltraSeal also: · Protects the system from damage caused by overheating · Assures reliable operation within an operating window of up to ±100 C° (±180 F°) The UltraSeal spring preloads the nozzle against the manifold, making it leakproof. Keeping our customers in the lead 5 6 Hot Runners SYSTEM DESIGN OUR HOT RUNNER SYSTEMS ARE DESIGNED WITH FACTORY OPERATING COSTS IN MIND. OUR DESIGN PRINCIPLES FOCUS ON PART-TO-PART CONSISTENCY, REDUCED MOLD MAINTENANCE, AND UPTIME. OPTIMIZED AND BALANCED MELT CHANNELS Every Husky hot runner undergoes melt flow analysis to confirm equal pressure distribution to each drop. Shear rate, residence time, and system pressure drop ensure balanced part filling and reduce the risk of material damage. Manifolds with more than four drops feature level changes for improved balance. Tests have shown that introducing level changes can improve balance by more than 10%. This means better part-to-part consistency. THERMAL LAYOUT Our manifold heater layouts follow rigid design guidelines based on thermal FEA analysis to ensure thermal balance. Heat loss is reduced by minimizing the contact of thermally conductive materials with the plates. The manifold and backing plate are cooled to reduce potential mold wear caused by temperature variances. MINIMIZED PLATE DEFLECTION Husky's designers use guidelines that were developed using FEA models to minimize plate and mold deflection, reducing mold wear. [. . . ] (802) 859 8000 Fax (802) 859 8322 Europe Zone Industrielle Riedgen Technical Center, B. P. (352) 52 11 51 Fax (352) 52 11 5 4458 Recycled paper, containing a minimum of 20% post consumer fiber. ®/© 2004 Husky Injection Molding Systems Ltd. [. . . ]