Tuesday 15 June 2021

Design Properties for Engineers: Hot Runner System Suitability of High Performance Polymers

 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


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[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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