Inductive welding of plastic objects with electrically interrupted heating means

An arrangement, comprising:

• a first inner object, which has a first plastic material;
• a second outer object, which surrounds the first inner object at least partially, and which has a second plastic material;
• and
• a heating means including a ribbon-type structure materially interrupted along a circumferential course,
• wherein the ribbon-type structure has an auxiliary heating material, which is inductively heatable,
• wherein the auxiliary heating material is spatially distributed or arranged along the circumferential course such that an electrical conductivity is interrupted at at least one position along a complete circumferential course around the first inner object,
• which heating means surrounds the first inner object at least partially along the complete circumferential course around the first inner object, and is arranged between the first inner object and the second outer object,
• wherein the heating means has a ribbon-type carrier, at which the ribbon-type structure is attached, wherein the ribbon-type carrier has a greater dimension than the ribbon-type structure along a longitudinal direction of the ribbon-type structure and wherein the ribbon-type carrier consists of an electrically non-conductive carrier material.

A system, comprising:

• a generator for generating an electromagnetic field, which inductively couples a coil device of the generator to a heating means,
• wherein the heating means is configured for thermally connecting two objects each having a plastic material, wherein, during the connecting, (i) a first inner object is surrounded at least partially by a second outer object, and (ii) the heating means surrounds the first inner object at least partially along a complete circumferential course around the first inner object, and is located between the first inner object and the second outer object, and wherein the heating means comprises
• a ribbon-type structure, which is materially interrupted along a circumferential course, wherein the ribbon-type structure has an auxiliary heating material, which is inductively heatable,
• wherein the auxiliary heating material is spatially distributed or arranged along the circumferential course such that an electrical conductivity is interrupted at at least one position along the complete circumferential course around the first inner object,
• wherein the heating means has a ribbon-type carrier, at which the ribbon-type structure is attached, wherein the ribbon-type carrier has a greater dimension than the ribbon-type structure along a longitudinal direction of the ribbon-type structure and wherein the ribbon-type carrier consists of an electrically non-conductive carrier material.

A method for thermally connecting two objects each having a plastic material, the method comprising:

• spatially arranging a first inner object, a second outer object, and a heating means including a ribbon-type structure,
• wherein the ribbon-type structure is materially interrupted along a circumferential course and has an auxiliary heating material, which is inductively heatable,
• wherein the auxiliary heating material is spatially distributed or arranged along the circumferential course such that an electrical conductivity is interrupted at at least one position along a complete circumferential course around the first inner object,
• such that (i) the first inner object is surrounded at least partially by the second outer object, and (ii) the heating means surrounds the first inner object at least partially along a completely circumferential course around the first inner object, and is located between the first inner object and the second outer object;
• inductively heating the heating means such that molten-on plastic material of the first inner object and/or of the second outer object connects directly or indirectly to molten-on plastic material of the respective other object, and
• cooling down the heating means,
• wherein the heating means has a ribbon-type carrier, at which the ribbon-type structure is attached, wherein the ribbon-type carrier has a greater dimension than the ribbon-type structure along a longitudinal direction of the ribbon-type structure and wherein the ribbon-type carrier consists of an electrically non-conductive carrier material.