METHOD FOR PRODUCING PRECHAMBER-FORMING MEMBER OF PRECHAMBER ENGINE, AND PRECHAMBER-FORMING MEMBER OF PRECHAMBER ENGINE

To provide a method for producing a prechamber-forming member of a prechamber engine that can improve the combustion efficiency of the mixture, and a prechamber-forming member of a prechamber engine .SOLUTION: A method for producing a prechamber-forming member of a prechamber engine includes an external fitting step for externally fitting a bottomed cylindrical second substrate 1032 to the outside of a cylindrical first substrate 1031, a filling step for filling solid metal to a gap between the outer wall of the first substrate 1031 and the inner wall of the second substrate 1032, a melting step, followed by the filling step, for raising the temperatures of the first substrate 1031, the second substrate 1032 and the metal to levels equal to or higher than the melting point of the metal, thereby melting the metal, and a cooling step, followed by the melting step, for cooling the first substrate 1031, the second substrate 1032 and the metal, thereby solidifying the metal.SELECTED DRAWING: Figure 3 【課題】混合気の燃焼効率を高めることができる副室式エンジンの副室形成部材の製造方法および副室式エンジンの副室形成部材を提供する。【解決手段】副室式エンジンの副室形成部材の製造方法は、円筒状の第１基材１０３１の外側に有底円筒状の第２基材１０３２を外嵌させる外嵌工程と、第１基材１０３１の外壁と第２基材１０３２の内壁との間に形成された隙間に、固体の金属を充填する充填工程と、充填工程の後、第１基材１０３１、第２基材１０３２および金属を、金属の融点温度以上の温度まで昇温させることにより金属を溶融させる溶融工程と、溶融工程の後、第１基材１０３１、第２基材１０３２および金属を冷却することにより金属を固化させる冷却工程と、を含む。【選択図】図３