Core shooting machine (12-150,000 yuan, or homemade)
heat treatment furnace
air compressor
Melting furnace (continuous about 500,000 units, self-controlled 200,000 units)
cut-off saw
Shot blasting machine (you can buy a small one)
The others are just some auxiliary equipment. There is not much money, and the whole set costs 2 million.
I can give you some help (equipment and technology) if you need it. Yantai74 @ 163.com