MANUFACTURING METHOD OF BRUSH, JIG FOR MANUFACTURING BRUSH, AND BRUSH

To provide a manufacturing method of a brush for efficiently and highly accurately manufacturing a brush in which bristle tips of fiber bundles are aligned, and a brush height from a holder bottom to the bristle tips is aligned.SOLUTION: A manufacturing method of a brush includes: a fiber bundle insertion/positioning step of inserting fiber bundles 103 into respective fiber bundle holding holes of a first plate 10, and abutting tips 103s of the fiber bundles on a second plate 20 arranged in a position with a predetermined dimension in an axial direction of the fiber bundles at a second surface side of the first plate; a resin material filling step of filling a resin filling tray 50 forming a resin filling part 55 with a non-hardened resin material PM; a resin immersing step of immersing the fiber bundles projecting to a first surface 10a side of the first plate into the resin material in the resin filling tray; a resin hardening step of hardening the resin material; a demolding step of demolding a holder formed by hardening the resin material from the resin filling tray; and a removal step of removing the second plate.SELECTED DRAWING: Figure 9 【課題】繊維束の毛先が揃いかつホルダ底面から毛先までのブラシ高さが揃えられたブラシを効率よく、かつ高精度に製造するブラシ製造方法を提供する。【解決手段】第１プレート１０の繊維束保持孔のそれぞれに繊維束１０３を挿入し、第１プレートの第２面側において繊維束の軸方向に所定寸法となる位置に配置された第２プレート２０に、繊維束の先端１０３ｓを突き当てる繊維束挿入・位置決め工程と、樹脂充填部５５を形成する樹脂充填トレー５０に未硬化の樹脂材料ＰＭを充填する樹脂材料充填工程と、第１プレートの第１面１０ａ側に突出した繊維束を、樹脂充填トレー内の樹脂材料に浸漬する樹脂浸漬工程と、樹脂材料を硬化させる樹脂硬化工程と、樹脂材料が硬化することで形成されるホルダを、樹脂充填トレーから脱型させる脱型工程と、第２プレートを取り外す取り外し工程と、を含む。【選択図】図９