This is how the visor manufacturing process works:
1. Shred plastic waste
2. melt plastic snippets into hot strands.
3. Fill the injection moulding machine with the hot strands
4. Pressing liquid plastic into the mould
5. Rework the holder (recycle logo on it, clip on foil and rubber band)
And another visor is ready.
Thanks for the great photos @lumengraphie