If the wall thickness of the casting is very thin, it must be heated in the pouring process in order to successfully cast.
There is no need to keep the temperature at 300~500 degrees.
In order to increase the fluidity of aluminum melt, some auxiliary elements can be added.
I really can't tell you the details.
Involving industrial secrets ~ ~ ~
On this issue, we are fortunate to have invited the authority of plastic surgery.
Professor Joe
Here is a detailed introduction to autolog