Method of filling cavities in workpieces or semi-finished produc

Details Method of filling cavities in workpieces or semi-finished produc Method of filling cavities in workpieces or semi-finished produc

1998-07-01

2000-11-28

Nappi, Robert E.

Acoustics

Sound-modifying means

Methods

181252, 181256, 181290, 181294, 4283073, 4283122, 4283179, 264 42, 264 469, F01N 182, G01K 182

Patent

active

061522600

ABSTRACT:
Method for filling cavities in workpieces or semi-finished products is provided, in which thermally foamable powdered carbon is added in fixed locations into the cavity to be filled and is heated together with the workpiece or semi-finished product in such fashion that the powdered carbon swells and fills the cavity as carbon foam, with the particles of powdered carbon in the delivered state being smaller than after foaming. A structural component is formed, especially a workpiece or semi-finished product for mounting on or in a motor vehicle body, having an enclosed chamber in which thermally foamable powdered carbon is added in a fixed location, with the powdered carbon being heated together with the structural element to swell the powdered carbon and form carbon foam.

REFERENCES:
patent: 3635676 (1972-01-01), Sands
patent: 4285909 (1981-08-01), Mizusawa et al.
patent: 4734323 (1988-03-01), Sato et al.
patent: 5153388 (1992-10-01), Wittenmayer et al.
patent: 5518806 (1996-05-01), Eder et al.
"Neuartige Werkstoffe aus Kohlenstoff fur den Chemie-Apparatebau," Dr. E. Donges und Dr. O.Vohler, Sigri Elektrographit GmbH, Meitingen, Herrn Prof. Dr. L. Kuchler zum 60., Geburtstag, Chemie-Ing.Techn. 42, 1970/Nr. 19, pp. 1197.
Copy of Japanese Office Action dated Sep. 28, 1999.

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