PROBLEM TO BE SOLVED: To provide a method of manufacturing an interdental cleaning tool which can suppress breakage of a shaft part in detaching a base part from a mold.SOLUTION: A method of manufacturing an interdental cleaning tool includes: a base part forming process for forming a base part by filling a first space of a primary mold (50) having a first mold (50A) and a second mold (50B) with a synthetic resin and a cleaning part forming process for forming a cleaning part around a shaft part by filling a second space of the secondary mold with elastomer. In the base part forming process, a mold which has a first contact part (51A), a pair of first separating parts (54A), and a first connecting part (52A) and has an acute angle (θ) formed by each of the first separating parts (54A) and a dividing surface is used for the primary mold (50A), and a mold which has a second contact part (51B), a pair of second separating parts (54B), and a second connecting part (52B) and has an acute angle formed by each of the second separating parts (54B) and the dividing surface is used for the secondary mold (50B).SELECTED DRAWING: Figure 2COPYRIGHT: (C)2019,JPO&INPIT【課題】金型から基部を取外す際における軸部の折れを抑制可能な歯間清掃具の製造方法を提供すること。【解決手段】歯間清掃具の製造方法であって、第1金型(50A)及び第2金型(50B)を有する1次金型(50)の第1空間に合成樹脂を充填することによって基部を形成する基部形成工程と、2次金型の第2空間にエラストマーを充填することにより軸部の周囲に清掃部を形成する清掃部形成工程と、を含み、基部形成工程では、第1金型(50A)として、第1接触部(51A)、一対の第1離間部(54A)及び第1連結部(52A)を有し、各第1離間部(54A)と分割面とのなす角(θ)が鋭角となるものが用いられ、かつ、第2金型(50B)として、第2接触部(51B)、一対の第2離間部(54B)及び第2連結部(52B)を有し、各第2離間部(54B)と分割面とのなす角が鋭角となるものが用いられること。【選択図】図2
