Title:
吸音作用を有する絶縁部材の製造方法、及び、この製造方法により製造された絶縁部材
Document Type and Number:
Japanese Patent JP3578994
Kind Code:
B2
Abstract:
The invention relates to a method of producing a sound-absorbent insulating element with at least two metallic leaves or sheets (2, 3) in the form of films or sheets. According to said method, at least one of said elements is provided with knobs in such a manner that the limit of elasticity of the respective sheet (2, 3) is exceeded during the knobbing process, resulting in the formation of fissures (4, 11). Said fissures substantially help to improve the acoustic absorption capacity of the insulating element produced according to the inventive method.
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Inventors:
Evelyn Zwick
Application Number:
JP2000597543A
Publication Date:
October 20, 2004
Filing Date:
February 02, 2000
Export Citation:
Assignee:
Liter Automotive (International) AG
International Classes:
B60R13/08; B21D22/02; B21D22/08; B21D33/00; B21D53/88; F01N3/28; F01N13/14; F02B77/11; F02B77/13; G10K11/172; (IPC1-7): B21D22/02; B21D33/00; B21D53/88; B60R13/08; G10K11/172
Foreign References:
| WO1997027370A1 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro