	US 12,233,581 B2
	Manufacturing method of coil component and coil component
Motomi Takahashi, Natori (JP); Tomohiro Kajiyama, Natori (JP); Teruaki Tanaka, Natori (JP); Shinichi Sakamoto, Natori (JP); Juichi Oki, Natori (JP); Mitsugu Kawarai, Natori (JP); and Tsutomu Otsuka, Natori (JP)
Assigned to SUMIDA CORPORATION, Tokyo (JP)
Filed by SUMIDA CORPORATION, Tokyo (JP)
Filed on Mar. 21, 2022, as Appl. No. 17/699,583.
Application 17/699,583 is a continuation of application No. 16/989,192, filed on Aug. 10, 2020, granted, now 11,312,045.
Application 16/989,192 is a continuation of application No. 14/845,534, filed on Sep. 4, 2015, granted, now 10,786,932, issued on Sep. 29, 2020.
Claims priority of application No. 201410462552.4 (CN), filed on Sep. 11, 2014.
Prior Publication US 2022/0203582 A1, Jun. 30, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 43/18 (2006.01); B22F 1/08 (2022.01); B22F 1/10 (2022.01); B29C 43/00 (2006.01); B29C 43/52 (2006.01); H01F 17/04 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01); H01F 41/00 (2006.01); H01F 41/02 (2006.01); H01F 41/061 (2016.01); H01F 41/076 (2016.01); B22F 3/12 (2006.01); B29K 83/00 (2006.01); B29K 105/16 (2006.01); B29K 505/00 (2006.01); B29L 31/34 (2006.01)

CPC B29C 43/18 (2013.01) [B22F 1/08 (2022.01); B22F 1/10 (2022.01); B29C 43/00 (2013.01); B29C 43/003 (2013.01); B29C 43/52 (2013.01); H01F 17/045 (2013.01); H01F 27/2847 (2013.01); H01F 27/2852 (2013.01); H01F 27/292 (2013.01); H01F 41/005 (2013.01); H01F 41/0246 (2013.01); H01F 41/061 (2016.01); H01F 41/076 (2016.01); B22F 3/12 (2013.01); B29C 2043/181 (2013.01); B29K 2083/00 (2013.01); B29K 2105/16 (2013.01); B29K 2505/00 (2013.01); B29K 2995/0008 (2013.01); B29L 2031/34 (2013.01); H01F 2017/046 (2013.01); H01F 2017/048 (2013.01)]

9 Claims

1. A manufacturing method of a coil component comprising the steps of:

preparing a mold body having a bottom unit and a plurality of split molds to form a cavity portion with one opening portion;

preparing a coil assembly body, in which a coil is attached on a magnetic core including a plate,

putting the coil assembly body in the cavity portion from the opening portion,

putting a viscous admixture including magnetic powders and thermosetting resin on the coil assembly body,

pushing the viscous admixture to envelope the coil assembly by the press body, and

thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body,

wherein the bottom unit of the mold body has a through-hole and the through-hole is covered by the plate of the magnetic core in the process of pushing.