>>21564855
>>21564868
To expand on how it happened at my factory, you'd take a big wheeled container that's like 2.5mx1m full of reject product to the recycling room, the plastic is fed onto a conveyor that goes into the granulator, that heats and shreds the plastic until it becomes little plastic beads, the beads are then heated and reflowed into a plastic roll which feeds out into a room next door, in the room next door, the plastic is rolled into cylinders and cut to length. You then take your recycled roll back out and feed it back into the machine
Pic related, you can see the big rolls waiting to be fed into the extruders.