| 摘要 |
<p>Method for producing the sealing seat (11) of a fuel injector (1) for an internal-combustion engine, the sealing seat (11) having a plurality of injection holes (3); the method comprises the steps of: mixing plastic binder with a powdered metal so as to obtain a homogeneous compound; injecting, in order to form the sealing seat (11), the homogeneous compound into a mould (14) that reproduces in negative the shape of the sealing seat (11); obtaining within the mould (14) a plurality of punches (15) that reproduce in negative at least partially the shape of the injection holes (3) in such a way as to form within the mould (14) the sealing seat (11), which already presents the injection holes (3); and subjecting the sealing seat (11) to a thermal treatment to eliminate the plastic binder and sinter the powdered metal.</p> |
