冷却优化如何否决定取决于目标可以改变什么.pdf

How to Optimize Cooling ⚫ Decision whether to optimize cooling depends on  Objectives  What can be changed What can be Changed? ⚫ Water line layout  If there is enough room in the tool to move lines  If lines should be split  If tool is not built yet ⚫ Coolant temperatures  For all circuits, if they are not individually controlled  In individual circuits, if more than emperature controller is available What can be Changed? ⚫ Cooling time  Rule of thumb is to minimize cooling time  Shorter cooling times will, however, make temperature distributions worse ⚫ Flow rates  Once cool fully turbulent, reasing the flow rate is generally a waste of energy Review Results Compared to Objectives ⚫ Generally best to optimize temperature distribution with a fixed cycle time ⚫ The lower the temperature variation, th ter  Across the and core  Between the and core ⚫ Results to review lude  Temperature (top), part  Temperature (bottom), part (mid ne only)  Temperature difference, part (mid ne only)  Temperature profile, part Optimize Cooling Time ⚫ Cooling time can be optimized when  An acceptable temperature distribution is established  The average mold surface temperature is at or below the target mold temperature  Cooling time is optimized by running an automatic ysis Exercise ⚫ Review results from Cooling ysis Strategies unit on dustpan and determine possible changes to minimize temperature differenc ween and core ⚫ Possible changes lude  Water line layout • Adding circuits/branches • Changing position  Changin