Metal working – Method of mechanical manufacture – Muffler – manifold or exhaust pipe making
Patent
1994-11-23
1996-01-02
Cuda, Irene
Metal working
Method of mechanical manufacture
Muffler, manifold or exhaust pipe making
29445, B23P 1500
Patent
active
054797063
ABSTRACT:
A method for easy and reliable manufacture of a silencer constructed with a multi-perforated inner tube and an outer tube, between which a sound-absorbing material such as glass wool, etc. is filled in, without use of a binding agent, etc. . . . In the method for manufacturing the silencer, a long web of mat-shaped sound-absorbing material S is wound on and around time outer peripheral surface of the multi-perforated inner tube 1 in multiple layers and to a predetermined thickness; then, a pair of levelling members 2A, 2B, each having a semi-circular concavity which is substantially eqaul to the inner diameter of the outer tube, are gradually brought into contact with the outer peripheral surface of the sound-absorbing material S, while rotating the inner tube T1 with the sound-absorbing material S having been wound therearound, in its winding direction to thereby level the outer diameter of the sound-absorbing material S to the inner diameter of the outer tube to a substantially equal degree; and the inner tube T1 inserted into the outer tube T2 immovably fixed by the outer tube fixing means such as clamps 3A and 3B, while continuously rotating the inner tube T1.
REFERENCES:
patent: 3259206 (1966-07-01), Straw
patent: 4774985 (1988-10-01), Broadbelt et al.
patent: 5092122 (1992-03-01), Bainbridge
patent: 5170557 (1992-12-01), Rigsby
patent: 5329698 (1994-07-01), Abbott
Ikeda Tsukasa
Tamano Akihiko
Cuda Irene
Sankei Giken Kogyo Kabushiki Kaisha
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