| 摘要 |
PURPOSE:To eliminate the occurrence of wasteful thick part as well as to secure a sufficient air suction area, by installing a net member, to be set up in a suction opening part, extendedly in a range from the vicinity of an inner opening end of the suction opening part to the vicinity of an outer end of a composition plane between two members constituting a silencer body. CONSTITUTION:A silencer 10 is provided with a body part 12 adjacently connected to the suction upstream side of a carburetor and a pair of suction opening parts 16 being bent from both ends of this body part 12 and projected obtuse-angularly. And, the silencer 10 is constituted of two members 50 and 60 joined with each other on a composition plane 24. In the abovemention constitution, a net member 30 to be set up in the suction opening part 16 is set up as extended in a direction leading to the vicinity of an outer end of this composition plane 24 from the vicinity of an inner and of an opening end 32 of the suction opening part 16. With this constitution, a mating face A between an upper mold and a lower mold is set to the same as the extending direction of the net member 30, while a direction, where both molds are pulled out, is set to a C direction whereby the occurrence of waste thick part at the time of molding is eliminated. |
