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View Full Version : Pack and Hold Time for Hot runner molds



Suhas
25th August 2011, 04:15 PM
How do you decide your holding times for hot runner molds?

Danny R
25th August 2011, 09:26 PM
I set those times based on the appearance of the molded part (sink) & also based on the dimension of the part.

rickbatey
29th August 2011, 10:24 PM
I still do a gate freeze study, but realize that there is no true gate freeze and look for the weight to start leveling off. Then at that time plus about a half a second extra, I set the press.

Suhas
30th August 2011, 06:30 PM
I am still not very clear on how to 'scientifically' determine this. I do have some ideas that I am working on. I will let you know these soon. In the meanwhile, please post your comments.
Thanks,
Suhas