| 摘要 |
PROBLEM TO BE SOLVED: To reduce cost by molding the constituent member of an intake manifold without complicating a molding die, and to form the shape of an intake passage into a desired shape. SOLUTION: The intake manifold is provided with a surge tank portion and a brantch pipe 11 having an intake passage R communicating with the surge tank portion, and is formed by joining an upper split body 20 and a lower split body 21 which are made from resin material to each other. The lower split body 21 has a pipe portion 31 forming a part of the branch pipe 11. The peripheral wall portion of the pipe portion 31 is provided with a wall portion 31b extending in the moving direction of the molding die molding the pipe portion 31. In the pipe portion 31, a wall surface forming member 16 forming the wall surface of the intake passage R is inserted to cover the wall portion 31b. COPYRIGHT: (C)2010,JPO&INPIT |
