WELDING METHOD, METHOD FOR MANUFACTURING LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE HEAD

To provide a method capable of removing fragments in a space in a short period of time in a welding method of a member using frictional heat.SOLUTION: A welding method for welding a first member 42 and a second member 41 includes a preparation step for preparing the first member 42 and the second member 41, a contact step for bringing the first member 42 into contact with the second member 41 so as to form a space between the first member 42 and the second member 41, a welding horn contact step for bringing a welding horn 50 into contact with the first member 42 or the second member 41, a vibration step for vibrating the welding horn 50 so as to weld the first member 42 and the second member 41 by frictional heat, and a fluid flowing step for causing a fluid to flow into the space. The fluid flowing step is performed in the middle of the vibration step.SELECTED DRAWING: Figure 9 【課題】摩擦熱を用いた部材の溶着方法において、空間内の破片を短時間で除去することができる方法を提供する。【解決手段】第１の部材４２と第２の部材４１とを溶着する溶着方法は、第１の部材４２と第２の部材４１とを用意する用意工程と、第１の部材４２と第２の部材４１との間に空間が形成されるように、第１の部材４２と第２の部材４１とを接触させる接触工程と、第１の部材４２または第２の部材４１に溶着ホーンを５０接触させる溶着ホーン接触工程と、第１の部材４２と第２の部材４１とを摩擦熱により溶着するために、溶着ホーン５０を振動させる振動工程と、空間に流体を流動させる流体流動工程と、を有し、流体流動工程は、振動工程の最中に行う。【選択図】図９