Quake Champions inspired hood ornament magnetic

thingiverse

This is a Quake Champions inspired hood ornament designed in Fusion360. I designed it so that a piece of 1.75 mm filament is used to connect the pieces together and magnets are used to keep it on the hood. The filament hole and magnet holes are hidden underneath the base. The logo is held in place using a 1.7mm piece of filament pushed through the curved tunnel in the base that also goes through the ornament part. The magnets slide in from the bottom and then sideways. The forces of the magnets push away from each other keeping them from moving out from under the PLA ledge they sit on. I have included 2 plugs to put into the holes that the magnets go into in case you want to make sure they can't slide back toward the holes but I don't use them and don't think they are needed. I used white PLA to reduce the heating up of the hood ornament as white absorbs less of the sun's radiation. Using something other than PLA would be the best idea to withstand the heat of a car's hood but I have not tested printing with anything other than PLA as that is my preferred material for all printing. In the sun, the hood of my silver car gets to about 135 F degrees which seems to work just fine and the hood ornament does not melt, the magnets don't squash the bottom layer of PLA out, nor does it sag in my experience. It has been on my car in the Florida June sun for about a month without any problems. If you use a different color PLA or have a car with a darker color than silver then you will likely have issues with melting/warping on the car without annealing the PLA. My other car is a darker grayish blue color and it's hood gets to around 175 F degrees sitting in the sun. That is just too hot for the PLA without annealing it. The magnets being pulled toward the hood have deformed the PLA when I tried to remove it from the hood. In my experience, If you anneal the PLA, it will survive even on a dark colored hood. The bottom of the base is flat. Once the pieces are put together, you can heat the entire thing up to around 140 degrees if it is PLA and form it to your hood. If you don't do this, it will likely rotate easily because most hoods are round where you would put it. I use an oven set to around 170 degrees with a pan in the oven to also pre-heated the pan. I then turn off the oven and then put the fully assembled (with magnets in it too) ornament on the pan for about 20 minutes while the oven cools. I then repeat this process but pull it out of the oven in about 6 minutes or so and quickly put it on the hood of the car pressing down around the outside edges of the stand all at the same time to shape it to the hood. This whole process seems to anneal it a little and also form it to the hood. In my expiriments at the temperature that I set the oven to, there is very minimal warping but it likely doesn't anneal all the way either. It seems to withstand the hood of a darker gray colored hood though for me. I haven't tested it on a black car hood. If you use another material besides PLA, let me know how it goes. I suspect ABS wouldn't work well because this print is designed to print without any support and depends on bridging. ABS is usually printed without part cooling fans on from what I have read and I doubt bridging would work as well because of that. This is the cheapest place I could find magnets that are the same size that I use. They need to be strong. I have not ordered from there though. If you find a better source for them, leave a comment. https://appliedmagnets.com/neodymium-bar-magnets-1-2-in-x-1-4-in-x-1-8-in-n42-p-15.html You will need 2 magnets per print.