Cooling Optimization 2013精品.pdfVIP

Cooling Optimization © 2012 Autodesk Introduction  Aim  Learn how to optimize a cooling system  Why do it  Improve part quality  Reduce cycle time  Overview  Modify original design  Cooling line layout  Use of inserts  Cycle time  Achieve uniform mold temperatures © 2012 Autodesk How to Optimize Cooling  Decision to optimize cooling depends on  Objectives  What can be changed © 2012 Autodesk What can be Changed?  Water line layout  If there is enough room in the tool to move lines  If lines should be split to make shorter circuits  If tool is not built yet  Coolant temperatures  For all circuits  If they are not individually controlled  In individual circuits  If more than one temperature controller is available  Flow rates  Once coolant is fully turbulent  Increasing the flow rate is generally a waste of energy © 2012 Autodesk What can be Changed?  Cooling time  Rule of thumb  Minimize cooling time  Shorter cooling times will  Make temperature distributions worse © 2012 Autodesk Review Results Compared to Objectives  Generally best to optimize temperature distribution with a fixed cycle time  The lower the temperature variation, the better  Target should be +/- 5ºC for semi-crystalline materials  Across the cavity and core  Between the cavity and core  Difficult to achieve over the entire part  Review Temperature, mold results  Others as necessary to support mold results © 2012 Autodesk Optimize Cooling Time  Cooling time can be optimized when  An acceptable temperature distribution is established  The Cavity temperature - average is below the target mold temperature  Run an automatic analysis to optimize From Analysis Log Cavity temperature - average