From what I know, Tesla S is mostly stamped, and welded+glued, with some frame parts being extrusions.
This is the latest way of building car parts
en.wikipedia.org
Idra Group in Italy. They are notable for being the largest
high-pressure die casting machines in the world, with a clamping force of 55,000 to 61,000 kilonewtons (5,600 to 6,200 tf).
[2][3] Initial usage of a customised
OL 6100 CS Giga Press was started by
Tesla, Inc. in late-2020 with production of the
Tesla Model Y electric car rear
chassis,
[4] at the
Tesla Factory in Fremont, California.
[5]
Base specification
OL 5500 CS and
OL 6200 CS Giga Press machines had been included in Idra's catalogue since 2018.
[6] Each machine weighs 410–430 tonnes (900,000–950,000 lb).
[2][3]
Shots of molten aluminium weighing 80 kilograms (180 lb) are injected into the cold-chamber
casting mold with a velocity of 10 metres per second (22 mph; 36 km/h).
[7] The
cycle time is ~80‒90 seconds,
[2] allowing an output rate of 40‒45 completed castings per hour, or ~1,000 castings per day.
The future
en.wikipedia.org
"In 2018 a patent application assigned to Tesla showed four Giga Press casting machines arranged at right angles for
whole-vehicle unibody chassis casting"
