| 摘要 |
PURPOSE:To enable the forming at low temperature for short time to be achieved by a method in which after sound absorbing material has been preheated, its laminate is made before its forming with a honeycomb plate, etc., or the sound absorbing material is laminated on a honeycomb plate, etc., and the laminate having been made before its forming is preheated. CONSTITUTION:The sound absorbing material of a lower layer and the sound absorbing material of an upper layer are preheated at 150-200 deg.C for 10sec-5min and are made into a laminate before forming, or after the laminate before forming has been preheated at 150-200 deg.C for 10sec-5min, it is formed by pressurizing and heating under 1-50kg/cm<2>, at 200-230 deg.C for 30-90sec, thereby obtaining a formed laminate. Thus, since the laminate is made before the forming with a honeycomb plate, etc. after the preheating of sound absorbing material, or since the laminate before forming in which the sound absorbing material is incorporated into the honeycomb plate, etc. is preheated, the sound absorbing has the shape nipping the honeycomb plate, and even when said heat is not easily transmitted into the sound absorbing material adjacent to the honeycomb plate from outside in the case of molding, the heat obtained by preheating compensates said insufficient heat, and the formability of the material inside is perfectly supplemented. Consequently the forming at low temperature for short time may be carried out. |
