Cooling circuit pressure for RTM (transient from start-up) result

The Cooling circuit pressure for RTM (transient from start-up) result is generated from a Cool (FEM) analysis to show the distribution of pressure along a cooling circuit. It is a time dependant result, from the beginning of the first mold preheating stage.

Using this result

The pressure inside the cooling circuits should vary smoothly from the inlet circuit pressure to the outlet circuit pressure. Large pressure drops in the cooling circuits are caused by the cooling system design, such as when the bubbler or the baffle dimensions are too small.

This result can be checked to determine the flow direction in parallel cooling circuits. The pressure is highest at the coolant inlet and lowest at the coolant outlet.

You can use this result to check the coolant flow during all cooling stages for which active temperature control is desired. Check that the pressure drop is achievable with the coolant pump. For the actual time when the cooling stage changes, check the analysis log.

Timing of this result should correspond to the cooling stage durations set in the Cool (FEM) Settings page of the Process Settings Wizard dialog. The same timing can also be set in the RTM Cooling tab of the Reactive molding process settings dialog.

Things to look for

When viewing the circuit pressure result, check the following:

• The coolant pressure in each circuit is less than the coolant pump's maximum pumping pressure.
• Large localized pressure drops to identify constricted sections of the cooling circuits.