Sound absorption/insulation honeycomb panel
For forming a sound absorption/insulation honeycomb panel by stacking an air-permeable material, a honeycomb material filled with a sound absorption material and a reflector, and adhesively joining these materials, it is hard to join the honeycomb material and the air-permeable material adhesively due to a thin wall surface of the honeycomb material and a resultant line to surface adhesive joint therebetween, causing a problem of low adhesive strength. By using a water absorption honeycomb material, an adhesive joint is formed with an adhesive joint area increased by dipping an end of a wall surface of a cell forming the water absorption honeycomb material into a water-soluble adhesive, making the end flexible over a fixed period of time, and then pressing the end strongly against an air-permeable material as a counterpart of the adhesive joint to deform a tip into an inverted T-shape.
1. A method of manufacturing a sound absorption/insulation honeycomb panel by stacking a water absorption honeycomb material filled with at least a foam material and an air-permeable material, and forming an adhesive joint between the honeycomb material and the air-permeable material, wherein
the adhesive joint is formed with an adhesive joint area increased by dipping one tip of a wall surface of the water absorption honeycomb material into a water-soluble adhesive, making the tip absorb moisture in the water-soluble adhesive, and pressing the tip strongly against the air-permeable material so as to coincide with time when the tip is softened to deform the tip.
2. The method of manufacturing the sound absorption/insulation honeycomb panel according to claim 1 , wherein
the water-soluble adhesive is an emulsion-based adhesive.
3. The method of manufacturing the sound absorption/insulation honeycomb panel according to claim 1 , wherein
the water absorption honeycomb material is filled with a rigid water absorption foam material having an open-cell structure containing at least a rigid phenolic foam material or a rigid urethane foam material.
4. The method of manufacturing the sound absorption/insulation honeycomb panel according to claim 1 , wherein
the water absorption honeycomb material to be used contains either hydrated magnesium silicate or aluminum hydroxide, and pulp.
5. The method of manufacturing the sound absorption/insulation honeycomb panel according to claim 1 , wherein
a nonwoven fabric made of aluminum alloy fiber is used as the air-permeable material.