Procedure to estimate Gate Seal

• Set the injection speed to the value obtained from the viscosity curve experiment.
• Set the process at the center of the process window from the process window study.
• Set the cooling time to a value to ensure that the part is cooled before ejection. 
• Drop the holding time to zero and start molding. Mold approximately 5 to 8 shots. 
• Increase the holding time to one second and collect a shot.  
• Increase the holding time to two seconds and collect a shot. Similarly collect shots at increments of one second.
• Weigh the shots and plot a graph of part weight versus time similar to the graph in the picture.
• Determine the gate seal time.