Verfahren zur Herstellung einer Fluideinheit

摘要

First to sixth annular projections and first to sixth annular recesses, which have shapes corresponding to shapes of first to sixth conventional seal members, are formed respectively at portions at which various types of blocks and first and second intermediate plates are joined, by performing resin molding with molds. Ultrasonic welding is performed while the first to sixth annular projections face the first to sixth annular recesses, respectively.