Fibrous aggregate forming method, fibrous aggregate formed by said method, and fibrous aggregate forming apparatus

摘要

A forming method for a fiber aggregate in which fibers are heated to be welded with each other includes a heating step of applying heated air in an upward direction to a bottom of a block of the fibers to pass the heated air therethrough and to cause the block of fibers to float, wherein at least parts of fibers are melted while the block of the fibers float; a compression step of compressing substantially in a vertical direction the heated block of fibers to a desired thickness; and a cooling step of cooling the compressed block of fibers to solidify melted portions of the fibers at portions where the fibers intersect each other.