I’m about to print a form 1 ftn.5 rimfire can and I’d like to go ahead and do it with PPS-CF so that I can confidently dump rounds out of a pistol without worrying about it effecting the can. I know it probably sounds like overkill for rimfire but I have friends that aren’t believers so I really want to give this it’s best shot at heat resistance. I have a Qidi Plus4 so it’s more than capable of high temp printing. My question is, I’ve never done anything annealed so how do you anneal PPS-CF? My work does powder coating so we have a spare kitchen oven laying around for small parts so I’d love to find a way to just toss it in there for a 10 hour shift but I’m worried about if that’s risky because of the radiation off the elements. Can I wrap it in tin foil to block radiation or do I need to do something like fill a pan with sand to insulate it?
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I don’t anneal pps-cf and to tell you the truth I also don’t anneal pa6 or ppa anymore either because it makes them weaker.
I stopped as well and any benefit from annealing has been so minuscule. I’m sure others will experience a difference based on their climate but personally I have not.
I use a PID controlled toaster oven. Once the oven is pre-heated, the duty cycle on the heating element to hold temperature is pretty low so you’re unlikely to have major radiant heating problems. The resistive heating element on mine is in the bottom, so I just put a piece of cardboard (tested for temperature tolerance) on the rack in the middle and set the part on that. The cardboard blocks direct radiant heat as well as conduction from the wire rack. I annealed my PPA-CF FTN.5 Rimfire that way and it came out great.
Back when I used PPS-CF, sand was my go-to for annealing—so much so that I still default to it today for every annealing. But that’s a tale for another day.
