This is how the visor manufacturing process works:
1- Shred plastic waste
2- Melt plastic shreds into hot strands
3-Fill the injection moulding machine with the hot strands
4- Press the liquid plastic into the mould
5- Rework the holder (put the recycling logo on it, clip on the foil and rubber band)
And there you have another visor.
Thanks for the great photos @lumengraphie