Magnetic actuator

A method for producing a one-piece pole body for a magnetic actuator, comprising:

• providing a magnetic material and a nonmagnetic material;
• and
• producing nonmagnetic regions and magnetic regions of the one-piece pole body using a two-component metal powder injection molding process such that the nonmagnetic regions and the magnetic regions are connected to one another in a continuous material manner, the nonmagnetic regions being arranged alternatingly to the magnetic regions in a circumferential direction about the pole body;
• wherein at least one of:
• the pole body extends distally from a first axial position at which the pole body is radially interior to a coil housing to a distal end of the pole body that is at a second axial position, the second axial position being beyond a distal end of the coil housing, the distal end of the pole body surrounding a proximal end of a valve needle housing, the entire valve needle housing being distal to the distal end of the coil housing;
• and
• a flange extends radially outwards from the pole body, the nonmagnetic regions provide an isolation of the magnetic regions from one another, all the magnetic regions and all the nonmagnetic regions of the pole body together form the single continuous integrated pole body, and at least one of (a) a lead-through for an electric contacting is situated in the flange and (b) the pole body is surrounded by a coil housing along at least a portion of an extent of the pole body along an axial direction of the pole body, and a coil is situated in a radial direction between the coil housing and the pole body.

A magnetic actuator, comprising:

• at least one magnetic region;
• and
• at least one nonmagnetic region that provides a magnetic isolation of the magnetic region;
• wherein:
• the at least one magnetic region and the at least one nonmagnetic region are connected using a two-component metal powder injection molding process, such that the at least one magnetic region and the at least one nonmagnetic region form a single continuous integrated pole body;
• the at least one nonmagnetic region is arranged alternatingly to the at least one magnetic region in a circumferential direction about the pole body;
• and
• the pole body extends distally from a first axial position at which the pole body is radially interior to a coil housing to a distal end of the pole body that is at a second axial position, the second axial position being beyond a distal end of the coil housing, the distal end of the pole body surrounding a proximal end of a valve needle housing, the entire valve needle housing being distal to the distal end of the coil housing.