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16th May 2019, 02:13 PM
#1
Injection Graphic
Hello all!
I pulled an injection graphic as well as the pack/hold in hopes of getting an explanation of what is happening. We have 4 identical machines and molds, but each graphic looks different.
I'm hoping to get an understanding of what the graphics should look like and why.
Blue Line - Injection Velocity
It is pretty straight forward until we switch to pack and hold
There is a slight dip followed by a relatively constant velocity before dipping again at the end
What actions are creating that profile? I was thinking screw rotation, recovery and decompression...but I don't know which part is which
Green Line - Screw Position
The screw position graphic is showing position during injection, pack and hold, decompression, recovery
Orange Line - Injection Pressure
This graphic shows the injection pressure during the cycle.
I can understand why it is increasing during the injection phase, but I don't know why it is dipping before leveling off in the pack/hold
There is also some dipping at the end that I'm not sure what it is from?
Thanks!!
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