this post was submitted on 09 Jan 2025
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Wouldn't that be susceptible to melting due to oven temps? Or is that probably made from a higher temp filament?
What's the melting point of the regular filament? You're supposed to touch the oven knobs it so it's probably not much higher than 50 degrees.
50 degrees? How do your oven knobs even get that hot? Mine don't change temperature at all, always room temperature. If your oven knobs get recognizably warmer (yet to spend of 50°) something seems to be awfully wrong with your oven!
They should not be that warm but it's about the limit of what is comfortable to touch.
The comfortable temperature limit to touch is room temperature because anything higher indicates a broken oven which makes me highly uncomfortable.
50° K?
Hopefully if it's a decent oven there isn't that much heat on the outside. I guess if you just left the door open, it might eventually melt
Not really. You can print it out of ABS easily enough if that's a concern, given that there is a good chance that is what the knob on any given residential range or oven is likely to have been made out of by the factory anyway.
As a matter of fact, since this is directly in my wheelhouse (not that wheelhouse, the other one) vis-a-vis both 3D printing and whitegoods, let's take a look.
Being in the unique position to be able to do so, I grabbed a knob off of a random smattering of ranges. Here's what I found from the ones that didn't require taking them apart further to find the markings or scraping at them with a knife or something (hey, there's the other wheelhouse):
PBT has a pretty similar melting point to ABS at ~235° C. With ABS it's complicated, but I print ABS at 260° C for what it's worth. PET is also typically given around 260-270. So these are all pretty similar to each other.
TL;DR: You should be fine with ABS.
Oh sweet, knowing how to use a knife is right up my wheelhouse too!
Glass transition temp of PLA is around 55-60C - that’s when it starts to get malleable. I’d be pretty surprised if the oven knobs get that hot.
Depends on the type of filament used and temperatures that are actually present at the knob. I would say no since the temperature required to melt (or warp) the knob would have to be high enough to cause some pretty severe burns if you touched it with your hand. if the knobs on the oven/range are getting that hot, there is a lot more to worry about here than the knob melting.