VEHICULAR INTAKE MANIFOLD AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent the degradation of jointing strength in the vicinity of engine mounting flanges in a vehicular intake manifold provided with plural branch pipes horizontally arranged side by side whose projection chart to a vertical plane has a shape bent nearly at 90 deg. and whose one-side ends are commonly connected to a surge tank, and the engine mounting flanges commonly continuously mounted to the other-side ends of the respective branch pipes, and particularly in a vehicular intake manifold composed by welding a pair of jointing members formed of a synthetic resin to each other. SOLUTION: A welding margin in the direction perpendicular to the pressing direction 39 of a part corresponding to a slanting part 32a out of welding margins set before welding in at least one of first and second jointing members 15 and 16 along a jointing line 32 is set larger than that in the direction perpendicular to the pressing direction 39 of the remaining parts other than the slanting part 32a of the jointing line 32.