Forming method of throttle apparatus for internal combustion...

Details Forming method of throttle apparatus for internal combustion... Forming method of throttle apparatus for internal combustion...

2006-08-15

2006-08-15

Bryant, David P. (Department: 3729)

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

C029S888450, C029S888460, C029S527100, C264S242000, C264S328800, C425S812000

Reexamination Certificate

active

07089663

ABSTRACT:
A throttle valve and the throttle body are formed substantially simultaneously in the same dies. The melted resin is injected in to a cavity through a pair of valve gates. The gas evaporated from a melted resin and remaining air in the cavity are expelled from the cavity into the atmosphere through a gas purge passage. A first and a second split lines of a first and second insert dies function as the gas purge passage. A shortshot and a corrosion generated by the gas can be avoided.

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