Do you know about steam molding technology in plastic injection?

Answer 1

God, no.

Answer 2

Steam is used to control the temperature of the molds and to induce the melt in the feed auger. There are other ways to do this as well.

If you are talking about using the steam to actually push a part against the tool - you wouldn't do that. You will condense the steam into water and have that to deal with. You would rather use a hot, dry gas to do this (air or nitrogen).