Method of manufacturing double-structure sound absorbing wall fo

Details Method of manufacturing double-structure sound absorbing wall fo Method of manufacturing double-structure sound absorbing wall fo

1976-10-28

1977-08-23

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

5230911, 264 465, 296 70, B23P 300, B23P 1904

Patent

active

040430227

ABSTRACT:
A method of manufacturing a double-structure sound absorbing wall having a cavity defined by joining first and second plate members, comprising the steps of providing said first and second plate members with gas bleeding holes and recesses depressed toward the inside of said cavity to abut the members to each other, providing a sound insulating member foamable by heat received in said cavity with relief holes for spot-welding corresponding to said cavity, holding said sound insulating member by said recesses upon abutting of said plate members, abutting said peripheral edges to each other, spot-welding said recesses to each other to close said cavity, and foaming said sound insulating member by heating to fill said cavity therewith.

REFERENCES:
patent: 2910730 (1959-11-01), Risch
patent: 3200026 (1965-08-01), Brown
patent: 3439406 (1969-04-01), Wallin
patent: 3717922 (1973-02-01), Witkowski
patent: 3811173 (1974-05-01), Baumann
patent: 3816837 (1974-06-01), Smith

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