Induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products

An induction sealing device for heat sealing a multilayer packaging material of sealed packages of pourable food products fed in a first direction, the multilayer packaging material including an electrically conductive layer and a plastic material layer, the induction sealing device comprising:

• a supporting body surrounding a cavity and formed of a heat-conducting material, the supporting body including a main portion positioned adjacent the cavity and fins protruding from the main portion, the fins bounding the cavity;
• an inductor positioned in the cavity and configured to be powered by a current generator, the inductor possessing at least one active surface which induces an electric current in the electrically conductive layer of the packaging material, when the inductor is powered by the current generator, to heat the electrically conductive layer of the packaging material and thereby melt the plastic material layer;
• an insert positioned in the cavity and formed of a magnetic flux-concentrating material;
• and
• a plastic member positioned in the cavity between the supporting body and the insert so that the supporting body, the plastic member and the insert are arranged sequentially in the first direction, the plastic member being formed of a material different from the magnetic flux-concentrating material of the insert.

An induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products fed in a first direction, the packaging material including an electrically conductive layer, the induction sealing device comprising:

• a supporting body formed of a heat-conducting material, the supporting body including a main portion extending crosswise relative to the first direction and fins protruding from the main portion, wherein the fins bound a cavity positioned adjacent to the main portion;
• an inductor possessing at least one active surface configured to induce an electric current in the electrically conductive layer of the packaging material, the inductor being positioned in the cavity;
• an insert formed of a magnetic flux-concentrating material and positioned in the cavity;
• and
• a plastic member possessing an appendix portion extending crosswise relative to the first direction, the appendix portion being positioned in the cavity between the insert and at least one of the fins.