Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1995-08-10
1997-10-14
Jordan, Charles T.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
419 23, 419 26, 419 28, 419 37, 419 54, B22F 310, B22F 500
Patent
active
056781636
ABSTRACT:
The present invention relates to an improved method of manufacturing an airbag initiator. Currently, an airbag initiator is comprised of three parts made out of two dissimilar materials plus a glass to metal seal. The present method builds the same airbag initiator with the body and the pins in one piece via a process called metal injection molding. The part is then placed in a furnace to remove a wax binder, then the temperature is ramped up slowly to remove a thermoplastic layer, and the temperature is further ramped up to form a sintered part. The sintered part being equal to or better than standards of wrought material. The initiator is then removed from the furnace and a glass bead is placed in a void area in the body of the initiator. The glass is melted forming a glass to metal seal between a first pin and the body of the initiator. A top portion of the initiator is then lapped off isolating the first pin from the body of the initiator. A bridge wire is welded to the first pin and the body of the initiator yielding the completed airbag initiator.
REFERENCES:
patent: 4422381 (1983-12-01), Barrett
patent: 5131679 (1992-07-01), Novak et al.
patent: 5140906 (1992-08-01), Little, II
patent: 5269056 (1993-12-01), Yang et al.
patent: 5454320 (1995-10-01), Hilden et al.
Jenkins Daniel
Jordan Charles T.
Moy Jeffrey D.
Weiss Harry M.
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