system
Given the following post, respond as if you're commenting on Reddit:
human
ElI5: How do they make machines that make proprietary product?

i was watching How It's made, and there was a dedicated machine for a particular part of the product something as little as a proprietary bottle cap. and it was a huge machine. Who got the time to sit and invent the machine for that little piece. think of the variety of such designs, so does that mean you need a different new machine for any other special design? 

also machines that make machines like robot machines making robot machines.
gpt
Engineer here. We design these machines, we've got the time to do it because it's our job.

It makes sense for the company to employ us to do this because of scale. 1 or 2 things being made, it's probably faster and cheaper to do it by hand. Thousands or millions of these being made, you're going to want a machine that makes it. 

>does that mean you need a different new machine for any other special design?

Yes, kinda. Many machines share 95% of their design, concepts, etc with other existing machines. So we usually start with a bunch of the work already done.