MANUFACTURING METHOD OF NOISE COUNTERMEASURE MEMBER

To provide a manufacturing method capable of manufacturing a noise countermeasure member which can be installed at thin-type equipment or a narrow place, and capable of suppressing damage to a magnetic core during manufacture of the same.SOLUTION: A noise countermeasure member comprises a magnetic core and a mold member. The magnetic core has a thin wall portion with a wall thickness of 1.5 mm to 4.0 mm. When molding the mold member, holding pins are allowed to be brought into contact with the magnetic core, to hold the magnetic core. The holding pins located in a position to be in contact with the thin wall portion are retracted to a position separating from the thin wall portion within a time period in which a filling volume ratio: E=(1-(D-C)/D)×100 that can be calculated based on a filling volume C and a volume D of the mold member becomes a value that satisfies 60≤E≤90.SELECTED DRAWING: Figure 1 【課題】薄型の機器や狭い場所へ取り付け可能なノイズ対策部材を製造でき、その製造時に磁性体コアの破損を抑制可能な製造方法を提供する。【解決手段】ノイズ対策部材は、磁性体コアと、モールド部材と、を備える。磁性体コアは、肉厚が１．５ｍｍ～４．０ｍｍとされる薄肉部を有する。モールド部材を成形する際には、磁性体コアに保持ピンを接触させて、磁性体コアを保持する。薄肉部に接触する位置にある保持ピンについては、充填体積Ｃとモールド部材の体積Ｄとに基づいて算出可能な充填体積率Ｅ＝（１－（Ｄ－Ｃ）／Ｄ）×１００が、６０≦Ｅ≦９０を満たす値となる期間内に、薄肉部から離れる位置へと退避させる。【選択図】図１