A mold assembly for vacuum forming a wind turbine component (102, 130), the mold assembly comprising: a plurality of support plates; and, a plurality of mold plates removably coupled to the plurality of support plates, the plurality of mold plates being stacked and removably coupled together to form a mold configured for forming the component (102, 130), each mold plate including a first surface partially defining a top surface of the mold, a second surface spaced apart from the first surface, a third surface extending from the first surface to the second surface, and a fourth surface spaced apart from the third surface and extending from the first surface to the second surface, wherein one or more of the plurality of mold plates define at least one of: a plurality of grooves in the corresponding third surfaces extending from the corresponding first surfaces to the corresponding second surfaces, the third surfaces of one or more of the mold plates being in contact with the fourth surfaces of the adjacent mold plates such that each groove forms a vacuum passage within the mold; or a plurality of grooves in the corresponding fourth surfaces extending from the corresponding first surfaces to the corresponding second surfaces, the fourth surfaces of one or more of the mold plates being in contact with the third surfaces of the adjacent mold plates such that each groove forms a vacuum passage within the mold. a plurality of support plates; and, a plurality of mold plates removably coupled to the plurality of support plates, the plurality of mold plates being stacked and removably coupled together to form a mold configured for forming the component (102, 130), each mold plate including a first surface partially defining a top surface of the mold, a second surface spaced apart from the first surface, a third surface extending from the first surface to the second surface, and a fourth surface spaced apart from the third surface and extending from the first surface to the second surface, wherein one or more of the plurality of mold plates define at least one of: a plurality of grooves in the corresponding third surfaces extending from the corresponding first surfaces to the corresponding second surfaces, the third surfaces of one or more of the mold plates being in contact with the fourth surfaces of the adjacent mold plates such that each groove forms a vacuum passage within the mold; or a plurality of grooves in the corresponding fourth surfaces extending from the corresponding first surfaces to the corresponding second surfaces, the fourth surfaces of one or more of the mold plates being in contact with the third surfaces of the adjacent mold plates such that each groove forms a vacuum passage within the mold. a plurality of grooves in the corresponding third surfaces extending from the corresponding first surfaces to the corresponding second surfaces, the third surfaces of one or more of the mold plates being in contact with the fourth surfaces of the adjacent mold plates such that each groove forms a vacuum passage within the mold; or a plurality of grooves in the corresponding fourth surfaces extending from the corresponding first surfaces to the corresponding second surfaces, the fourth surfaces of one or more of the mold plates being in contact with the third surfaces of the adjacent mold plates such that each groove forms a vacuum passage within the mold.