Hello all. We acquired an old press and tool from our customer who has asked us to re-qualify the process. Currently working on the viscosity study and having a bit of trouble (maybe machine related). Details below:

Material: Plateable ABS
Cavitation: 8
Hot Runner: Valve Gated
Machine: Van Dorn 300 HT Series (maybe late 90s', early 2000's)

Attached you can see the images from our study.

It appears that we have two areas on the curve that flatten out. When looking at the data, I found that fill time did not change when we adjusted injection speeds between 1.5-2.5 in/sec. Any ideas what could be causing this (not pressure limited).

Click image for larger version.  Name: Capture123.JPG  Views: 26  Size: 35.9 KB  ID: 591