The Time to reach ejection temperature, part (profile) result is a Dual Domain result that is produced by a Cool analysis and shows the time required to reach the ejection temperature. This result is measured from the start of the cycle, and recorded at the point where the normalized thickness = 1.000.
At the start of the measurement, the part is assumed to be filled with material at its melt temperature (Tmelt).
The time to reach ejection temperature is calculated for each element, based on the mold wall temperature. If the mold wall temperature at a specific element is above the ejection temperature (Teject), then a warning is posted in the Analysis Log and no result is written on those elements.
- Increase the cycle time, to obtain more time for cooling.
- If you have already designed a cooling circuit, lower the temperature of the coolants.
- Place a cooling circuit in the area where the elements are not freezing
Using this result
To see how the temperature varies through the thickness of the part, you can create an XY plot of the result at different points on the part. To do this, click 
, then click 
and scroll down to the Time to reach ejection temperature, part (profile) result. Remember to change the Plot type to XY plot, and on the Plot Properties tab, change the Independent variable from Time to Normalized thickness.
Ideally the part should freeze uniformly. Areas of the part that take longer to freeze may indicate hot spots, or thicker cross sections.
Look at the time difference between most of the model freezing and the last area freezing. If this difference is large, determine if the problem is caused by an increased wall thickness or a high mold temperature. If the thickness is high, consider redesigning the part. If the mold temperature is high, modify the cooling layout to eradicate the hot spots.
Things to look for
When viewing the Time to reach ejection temperature, part result, watch for the following:
- Uniform polymer freeze distribution.
- Check the Circuit Reynolds number result to ensure that the Reynolds number values for each circuit are high; low values indicate inefficient heat extraction. Increase the flow rate into the relevant circuit(s).
- Hot spots—try to achieve more uniform cooling.