My grandfather used to make laminated stocks for some of his guns. Not sure how you'd get the curves shown on that bow riser, but I'm betting that would be a "hot press" situation as well. Special molds to assure adhesion. For a standard laminated riser or gunstock, it's basically nothing more than glueing sheets of wood together with epoxy, clamping them as tight as possible without damaging the fibers,(good to use an extra sheet/block on the outside of each side for protection), then cutting to a rough shape with a bandsaw when it's dry. Then the handwork begins. It would make the most sense that the riser would have the layers in the same way as a gunstock, but you would hold the riser vertically, not horizontally. That way you'd be looking at the layers when shooting the bow, and some would show on the sides as well. Should be the strongest oriented that way. Footnote, make sure the wood you use is seasoned wood. Fresh wood can warp the entire thing, even if it's just one layer.
2006 Rytera Bullet X 60#---2008 Moab 70#
2008/12 Firecat 60#--- 2010 Warthog 70#
2010/2012 Alien X 65# 2011 Onzas 60 & 70#
2009 Warthog 70#---2009 Firehawk 70#
2010 Strother SR-71 65# & 2012 Strother Rush 65#
I hunt, therefore I eat. lol