Abstract: A greaseless mold carrier and alignment system includes a tie rod bracket on each of a pair of lower tie rods of an injection molding machine. Each tie rod bracket has a top bearing plate and a side bearing plate. A center mold section of a stack mold assembly has mold brackets connected to opposite sides thereof, each mold bracket having sets of bearing rollers rotatably supported thereon to engage respective bearing plates. The system provides moving vertical support and lateral alignment to the center mold section for precise engagement with stationary and movable mold sections of the stack mold assembly of the molding machine.