SOUND ABSORPTION HEAT INSULATOR MANUFACTURING METHOD, WHICH IMPROVES THE ABSORBING PERFORMANCE BY REDUCING A PERFORATED SURFACE OF NON-WOVEN FABRIC

摘要

PURPOSE: A sound absorption heat insulator manufacturing method is provided to increase an absorbing performance at a specific frequency band and to increase a removal ratio by removing the perforated surface of non-woven fabric.;CONSTITUTION: A plurality of sound absorption holes is made of non-woven fabric. A perforated surface, which is generated in a sound absorption ball formation process, is removed at first by ejecting compressed air to the on-woven fabric at a high speed using a compressed air injection member. The surface of the non-woven fabric is directly scratched by using a scratching member. The remaining perforated surfaces are removed by detaching.;COPYRIGHT KIPO 2010