Injection molded inductive apparatus, powder magnetic core, and injection molding method

An injection molded inductive apparatus, comprising a powder magnetic core, a coil and an injection molding body, wherein,

• the powder magnetic core comprising two first components and a plurality of second components;
• wherein:
• the two first components are arranged opposite to each other,
• the plurality of second components are arranged in two rows in parallel and between the two first components, the second components forming winding portions provided with at least one groove, wherein a depth of the at least one groove is ranged between 1 mm and 5 mm, and a width of the at least one groove is ranged between 3 mm and 15 mm,
• the winding portions are configured to be wound by a coil, the inner side of the coil and the at least one groove on the winding portions forms an injection molding channel,
• all the first components and the second components are assembled to form an annular structure that generates an electromagnetic loop when the coil is energized,
• wherein the at least one groove on the winding portions are extended to at least one end of the winding portions and extended beyond a coverage of the coil on the winding portions,
• wherein the second components are provided with fixing parts configured to surround and fix preset fixed brackets for claiming the first components,
• the at least one groove on the winding portions of the second components are extended to the first components, the at least one groove extended on the first components and the fixed brackets fixedly therearound form an injection molding inlet;
• and
• the injection molding inlet is connected with the injection molding channels, and plastic melt is capable of being injected to the injection molding channels through the injection molding inlet to form an injection molding body;
• the coil is wound on the winding portions, and an injection molding channel is formed between an inner side of the coil and the at least one groove on the winding portions;
• and
• the injection molding body is filled in the injection molding channels and constitutes an integrally molded body together with the powder magnetic core and the coil.