Hello and welcome to a new blog post!
Today I present to you the hot runner system suitability data
of high performance polymers for injection moulding.
In my comparison I have selected three different hot runner
systems:
-Nozzle gate, open with straight outlet
-Nozzle gate, open with tip ("hot tip")
-Valve gate with needle
For every of the eleven selected high performance polymers
the suitability to use the different hot runner systems was checked by
literature review.
 |
| Hot Runner System Suitability of High Performance Polymers |
Allover, material degradation is more likely to occur when
hot runner systems are used due to the longer residence times at higher
temperatures and often not completely balanced flow/temperature gradients in
the hot runner system itself. Therefore it is essential to lower the
temperature of the hot runner whenever moulding is interrupted.
Additionally, it is beneficial to have a hot runner system
which allows a separate heating zone by using different control units as well
as using an electrical circuit which enables gradual heating (less risk of
short circuiting due to moisture present in the heater cartridges).
What are your experiences with hot runner systems and high performance polymers?
Let me know in the comments below.
Greetings and #findoutaboutplastics
Herwig
Interested to talk with me about your plastic selection and part design needs - here you can contact me
Literature:
[1] https://docplayer.org/112974799-Heisskanal-systeme-fuer-technische-thermoplaste.html
[2] https://www.picoplast.nl/uploads/Grivory%20HT1V%205%20FWA%20black%209225%20-%20MDS%20-%20DE.pdf
[3] https://www.synventive.com/uploadedFiles/MK-PRM.BRM.DE-P.HRGD01.pdf
[4] https://multimedia.3m.com/mws/media/96718O/injection-molding-guide-for-dyneontm-pfa.pdf
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