I don't think there was shrinkage, the surface stat was good and the clips seemed to be fully filled.
My first idea was about grain size lowering since brittleness could comes through large grains. And with less time, growth is shortened. But since parts core is filled earlier and is hotter...
Sry for 2nd post, I didnt find out how to edit.
Misstaken farther and further.
We are drying the PBT for 5 hours @120°C following Duranex technical sheet.
Nicolas
Hi guys,
thx for answers.
Tests have been done and now here is a result which offers a 0% break rate.
Surprisingly it has been obteined by reducing the mold temperature from 60°C to 40°C.( In fact these parameters gave us 0.8% against 9.6%.
Our theory was:
60°C--> mold is filled via large...
Patprimmer,
Thank you for your help,
I was discussing about making an annealing on a very bad serie to see if there is a difference. So that, if I don't see any i could considere my problem isn't 2) or 3)?
For the annealing, which temperature and time should I try?
If the annealing solves my...
Hi,
I hope i'll be understood though my english has to be worked.
The problem concerns injected electrical connectors made of PBT Duranex(c). There are little elastic "clips" which let the conector pass at first and block it (hoping i'm clear). And so, the problem is that about 5% of the parts...
