i am trying to understand the logic behind autoclave and i end up with stupid question

so how it works. i know it is pressurized chamber.with controlled temperature and vacuum  inlets. thats all clear.

but what that pressure brings if the part is already in vacuum bag?
what is different than just vacuum bagged part in controlled oven?

i know it must bring something, otherwise noone would spend huge amount of money for.

so if someone cold explain me that i would appreciate.

regards
T

Slight variation where you are in the world and at what altitude but if you pull full vac on a part you will have 15PSI of pressure on your part

In a clave you looking at 30-90 psi depending on what your doing

Night and day difference in the finnished parts