Why Use a Percent of Peak for Pack?

In order to calculate good pack numbers† from cavity pressure sensors, the eDART™ must be given the correct information about what “packed” means. In the Sequence Settings you select the sensor location you want to use to determine whether the cavity is packed. Why...

Wherefore “Fill and Pack Integral”?

We have recently seen several customers using the eDART™ summary value “Fill and Pack Integral” for a part quality alarm. This value and “Fill and Pack Time” are most used for thin-wall molding quality alarms. We do not recommend using these for modest aspect ratio or...

What is it for, anyway?

Now that you know how to ensure that the eDART computes good cavity fill times, what do you do with them? The simple answer is that for any type of molding Process Time / Cavity Fill can be used for at least the following: Containment: Add Process Time / Cavity Fill...

A Graphical Explanation

In tip #19 I discussed how cavity pressure curves determine the in cavity fill time summary value. The Pack time is similarly computed. To wit:Process Time, Cavity Fill = time from stroke / volume zero crossing to a default of 1000 psi at the end of cavity...

Machine Fill v.s. Cavity Fill

After sending Tip #15: “What are Fill and Pack?” I got some questions that showed confusion between machine fill and pack v.s. cavity fill and pack.The short explanation is this: Cavity fill is when the material reaches the end of the cavity so that it can begin to...

What are Fill and Pack?

Many of the eDART’s computations of the in-cavity values depend on defining when the cavity is filled and when it is packed. This affects such things as cavity fill time (“Process Time”, “Cavity Fill”), pack rate, fill and pack time and...