Armature for a fuel injector

An armature for an injector comprising:

• at least one magnetic region;
• and
• at least one non-magnetic region, wherein:
• the armature is developed as a one-piece component,
• the magnetic and non-magnetic regions are integrally connected to each other as a two-component powder injection molding part, and
• the magnetic region is completely enclosed by the non-magnetic region;
• wherein the armature has an annular shape with a feed-through opening,
• wherein the non-magnetic region includes a first axial end face section, a second axial and face section, an inner circumferential section, and an outer circumferential section,
• wherein the first axial end face section faces an inner pole, and
• wherein a thickness of the first axial end face section and a thickness of the outer circumferential section are identical.

A fuel injector, comprising:

• a coil;
• a valve sleeve;
• a housing attached to an outer side of the valve sleeve, wherein the coil is situated within the housing;
• an inner pole;
• and
• an armature, including at least one magnetic region, and at least one non-magnetic region, wherein the inner pole and the armature are disposed in an interior of the valve sleeve along a center axis, and wherein:
• the armature is configured as a one-piece component,
• the magnetic and non-magnetic regions are integrally connected to each other as a two-component powder injected molded part, and
• the magnetic region is completely enclosed by the non-magnetic region.

A method for making an armature for a fuel injector, the method comprising:

• providing a first armature part having a magnetic region;
• providing a second armature part having a non-magnetic region, wherein the second armature part is arranged so that the non-magnetic region is completely enclosed by the non-magnetic region;
• and
• integrally connecting the first armature part and the second armature part to each other by a powder injection molding process, so as to form the first and second armature parts into the armature which is a two-component powder injection molding part, wherein the armature has a feed-through opening for receiving a valve needle.