Abstract: A method for manufacturing insulating bars made from a thermoplastic material, comprising: producing a band-shaped extrudate having a substantially rectangular cross-section from the thermoplastic material; producing an individual insulating bar or a plurality of insulating bars from the band-shaped extrudate in the longitudinal direction thereof; and severing the insulating bar or bars arrangement in the longitudinal direction thereof to provide separated insulating bars.

Abstract: A method for manufacturing an insulating bar made from a thermoplastic plastics material whereof the base body has a corrugated structure comprises shaping the insulating bar as a blank having a substantially planar structure of the base body without raised portions and recesses but with the connection strips, cooling the blank to a temperature corresponding to the maximum long-term service temperature of the plastics material or lower, heating the base body to a forming temperature which, for crystalline plastics materials, is approximately 30° C. below the crystallite melting point of the plastics material or higher, and for amorphous plastics materials, is approximately 30° C. above the softening point or higher, forming the base body by a tool to produce the alternating raised portions and recesses, while retaining the geometry of the connection strips, and cooling the insulating bar to a temperature corresponding to the maximum long-term service temperature or lower.

Abstract: So that insulating bars for composite profiles made from a thermoplastic plastics material may be manufactured economically with the respectively required dimensions and cross sectional shapes, in particular also having a corrugated structure of the base body, it is proposed that, in a first step, a strip-like extrudate having a substantially rectangular cross section should be produced from the plastics material and, in a subsequent step, an insulating bar arrangement having the shape of an individual insulating bar or the shape of a plurality of insulating bars that are joined together and are arranged parallel next to one another should be produced from the strip-like extrudate, and where appropriate the insulating bar arrangement should be severed in its longitudinal direction to give mutually separated insulating bars.

Abstract: A method for manufacturing an insulating bar made from a thermoplastic plastics material whereof the base body has a corrugated structure comprises shaping the insulating bar as a blank having a substantially planar structure of the base body without raised portions and recesses but with the connection strips, cooling the blank to a temperature corresponding to the maximum long-term service temperature of the plastics material or lower, heating the base body to a forming temperature which, for crystalline plastics materials, is approximately 30° C. below the crystallite melting point of the plastics material or higher, and for amorphous plastics materials, is approximately 30° C. above the softening point or higher, forming the base body by a tool to produce the alternating raised portions and recesses, while retaining the geometry of the connection strips, and cooling the insulating bar to a temperature corresponding to the maximum long-term service temperature or lower.