MICRO PERFORATED BOARD USING SOUND-ABSORBING MATERIALS AND ITS MANUFACTURING METHOD

摘要

The present invention relates to sound-absorbing materials using a micro perforated board and, more specifically, to sound-absorbing materials using a micro perforated board, which can reduce noise and gain fireproof performance by forming micro-sized holes in an external plate formed on the surface, and can provide block sound-absorbing materials by combining a plurality of perforated boards. The sound-absorbing materials using a micro perforated board comprise: a perforated panel which includes a plurality of micro perforations punched therein at regular intervals, a corner bending portion bent in both directions of a wide surface, and a connecting protruding portion having connecting holes and protruding from the corner bending portion; non-woven fabric which is arranged in the inside where the micro perforations of the perforated panel are formed; an internal panel which is arranged inside the non-woven fabric, includes a plurality of punched square holes, and a corner protruding portion facing the corner bending portion in both directions of the wide surface, and is fixed with blind rivets at the corner bending portion and the corner protruding portion; a structural square pipe which is arranged in the internal panel and fixed to the corner protruding portion with blind rivets; and a space which is formed inside the internal panel to be filled with glass cross non-woven fabric filled, wherein an external support plate with a fixing pin protruding therefrom is arranged on the internal panel, an internal support plate is coupled to an upper side of the glass cross non-woven fabric, and the glass cross non-woven fabric is fixed by bending a front end of the fixing pin.