PRODUCTION OF SOUND INSULATING MATERIAL

摘要

PROBLEM TO BE SOLVED: To obtain an excellent quality sound insulating material by using a shredder dust or the like by blowing/packing the shredder dust into a preform die to carry out the preform forming and then transferring the preform formed body to a normal forming die to carry out the normal forming of the sound insulating material by a hot press. SOLUTION: A preform forming die 20 having a shape of die surface simpler than that of the normal forming and a normal forming die 21 having a die surface corresponding to a shape of an actual sound insulating material are installed sequentially along the line direction while interposing an adequate transferring means of the preform formed body 24 at the forming site 17. A blowing resistance sensor is installed at the die 20. The blowing air volume from a blower 12 is gradually reduced correspondingly to the increase of the blowing resistance. This production method comprises blowing/packing the shredder dust into the die 20 to carry out the preform forming and then transferring the body 24 to the die 21 to carry out the normal forming of the sound insulating material by the hot press.