INDUCTION WELDING OF POLYMER ELEMENTS BY WINDING ASSEMBLY WITH SEVERAL SEPARATE WINDINGS Russian patent published in 2020 - IPC B29C65/36 B29C65/48 B29C65/50 F16L47/03 H05B6/10 H05B6/40 

FIELD: technological processes.

SUBSTANCE: invention relates to the technology of thermal connection of two elements from polymer material by means of inductive welding. Heating device (110) for thermal connection of pipe (150) made of first polymer material, with coupling (160) made of second polymer material, which covers at least section of pipe (150), wherein between pipe (150) and coupling (160) and/or built into pipe (150) and/or coupling (160) heating element (170), heated by induction, includes winding assembly (120), excited by generator (140) and comprising first winding (121), which in first cross-section comprises at least one coil, and second winding (122), which is electrically connected to first winding (121) and in second cross section comprises at least one coil, wherein the first and second cross sections are different; device includes capacitance element, which together with unit of windings (120) forms resonant circuit.

EFFECT: technical result is improvement of quality and efficiency of using inductive welding process energy.

19 cl, 9 dwg