Generally, low pressure casting is used for the shell. First of all, there must be a low-pressure casting machine (buy 450,000-600,000 ready-made and make 250,000).

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