Shot core machine (12-15 million, can also be homemade)
Heat treatment furnace
Air compressor
Melting furnace (to buy a continuous 500,000 yuan, homemade 200,000 yuan)
Cutting saw
Blasting machine (you can buy small)
Other auxiliary equipment is not a few dollars, the whole set down how to 2 million it
If you need me to provide you with some help (equipment and technology) yantai74@163.com