Because I was not completely satisfied with the creations of others and also with the waste produced by the printer, I considered using it. Finally, I created and tested a set (you can find more on my profile) of various molding molds.
Some important information:
The mold is designed so that the print can be easily removed.
Using a home oven may not be safe, heating the plastic produces a lot of chemistry, fumes and particles in the air.
If we use prints or cleaning towers, it is necessary to let the internal parts of the model heat up before molding.
I will try to guide you with simple instructions, but a different oven, the roughness of the material and environmental influences may want to adjust your procedure.
Print your mold, I recommend at least PET-G (I printed from PET-G) with 8 perimeters, 10 bottom layers, 10 top layers
Insert threaded plastic inserts into the mold using solder.
Preheat the oven to 200 degrees Celsius.
Weigh about 56,1 g of poop, cleaning towers, defective models on a scale. Everything MUST be made of PLA.
Coat all surfaces where the PLA will touch with a thin but sufficient layer of Vaseline.
Fold the bottom part of the mold and screw it together.
Scrape the heated plastic (in the oven for about 10 minutes if it is spread out in a layer, more if you made a pile) from the silicone mat and place the ball in the mold.
Forcefully (don't step on the mold, just push with your hands) insert the top part and press the mold. After two seconds, turn the lid 90 degrees so that it doesn't stick to the PLA.
Wait about two minutes, ideally place the mold near an open window where it is cooler. You can remove the top lid and check the mold.
After about 10 minutes (while the next batch is melting in the oven), we can unscrew the bottom part and separate it with a flat screwdriver. Let the print cool down and after a few minutes it can be separated from the bottom part of the mold.
After cooling, wash off the Vaseline well (you want to repeat this with a cleanser.)