how do they make latex gloves?

is there like a mold or hand mannequin or what? also, is a heating and cooling process used or is there some other type of chemical process involved?

Yep, they use a gloce-shaped form and dip it into molten latex. Once the latex cools, the whole things is just peeled off the form. They make condoms the same way.

An overview of latex glove manufacturing process

On a related note, does anyone know what polymer/elastomer nitrile gloves are made of?

On a related note, does anyone know what polymer/elastomer nitrile gloves are made of?

They’re made of nitrile rubber- something like a synthetic latex, I gather.

http://www.accautomation.com/art2.htm