Does anyone have experience with 3d printing of PEEK?

I want to upgrade my 3d Printer (UM2 Ex+) to a HT-Printer.

What kind of Thermistor did you use (type_K)?
Did you build an enclosure for your Printer?
How did you manage the temperature inside of your Printer?

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PEEK is an incredible material. Used in several mission critical applications such as a cost effective replacement for ceramics, orthopedic implants, and electrical systems. PEEK under traditional manufacturing methods is also a real challenge to manufacture a finished part. PEEK can me machined and hold tight tolerances very similar to compare to aluminum as far as softness and ease of machining. To 3D print PEEK is a whole new ball game. Some extruders currently use PEEK in the hot end itself. Take Printrbot for example, their first and third generation extruders use a PEEK shell directly connecting to the stainless steel hot end. PEEK melts at around 650*f 345*c which is quite high, this makes it a great engineering polymer but not very good for 3D printing.

Currently thre isn't enough market or industrial data to

 
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Currently there isn't enough market or industrial data to give an accurate perspective on what tools and resources are required. The effects of PEEK being extruded through a small diameter nozzle haven't really been noted, more or less because of the cost involved. Such an extruder would have to withstand temperatures upwards 800*f and to my knowledge there aren't any readily available software systems that support a temp range that high. Of course the machine would have to be enclosed, anything else wouldn't be an option. Then getting a thermistor that accurate at high temperatures would also be a huge challenge. I would recommend consulting an engineering firm on this. I look at it this way, PEEK is not a common polymer and if someone could perfect the technique or filament or possibly the machine you may have a solid part in that market. It may be well worth the professional help.

 
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