Magnetic yoke having carrier body and insulating body

In an induction crucible furnace having a furnace coil with furnace axis, a magnetic yoke, comprising:

• a bar-shaped core stack for conducting magnetic flux generated by the furnace coil, said core stack being formed of a multiplicity of individual, mutually electrically insulated single laminations with edges, said core stack having a principal surface facing the furnace coil and three principal surfaces not facing the furnace coil, said principal surface facing the furnace coil having a shape being subdivided threefold, defining a central region of said core stack to be positioned very near the furnace coil and two lateral regions of said core stack adjacent said central region, and defining a distance between said edges of said single laminations of said core stack and the furnace coil to be increased towards said edge in said two lateral regions of said core stack, forming acute-angled, lamination-free sectors parallel to the furnace axis in two peripheral regions of the magnetic yoke and to be directed towards the furnace coil;
• an insulating body formed of an electrically insulating and vibration-damping material;
• a carrier body having lateral walls at which said insulating body is mounted, said carrier body enclosing said three principal surfaces of said core stack not facing the furnace coil;
• and
• said insulating body extending surface-wide from one to another of said lateral walls of said carrier body, and said lateral walls of said carrier body and said core stack pressing the magnetic yoke surface-wide through said insulating body against the furnace coil.