Since cooling time typically consumes 40-60% of the overall cycle time, it is very important to optimize the mold temperature. Although there are many aspects to mold temperature, this will give you some steps you can take to begin the optimization process
Find the Specifications: The first step in the process is to determine the recommended mold temperature range for your material. This should be available from the manufacturer, design guidelines, processing guidelines, online, or in a guidebook.
Optimize Process: You should initially try to produce acceptable parts using the lowest recommended mold temperature. If this is not possible, then increase the temperature and try again. Essentially, the lowest mold temperature which provides acceptable parts has the highest likelihood to provide the lowest cycle time.