Composite molded body and method for manufacturing same

摘要

A composite molded body includes a main portion formed of resin, a ventilation channel configured within the main portion, a gas permeable membrane, and two inserted members embedded in the main portion. The ventilation channel has a first ventilation path P1 extending in a direction intersecting the gas permeable membrane and has an opening end leading to the external air, and a second ventilation path extending in a direction different from the direction in which the first ventilation path extends and having an opening end leading to the internal space of the casing. The inserted member forms a portion of the second ventilation path and has a membrane supporting portion formed with a through hole. The through hole constitutes a portion of the first ventilation path, and communicates with the internal space of the casing via the second ventilation path.

主权项

1. A composite molded body that is mountable on or integrated in advance with a casing having an internal space, the composite molded body comprising:
a main portion formed of an injection-moldable resin material; a ventilation channel configured inside the main portion to allow the internal space of the casing to communicate with external air; and a gas permeable membrane disposed in a midway portion of the ventilation channel, wherein the composite molded body further includes an inserted member having at least a portion thereof embedded in the main portion, a portion of the inserted member being exposed to at least one of the internal space of the casing and the external air, wherein the ventilation channel includes a first ventilation path having the gas permeable membrane at its midway portion, and at least one second ventilation path continuous with the first ventilation path, wherein the gas permeable membrane is arranged within the first ventilation path so as to block the passing of liquids, liquid droplets, and solid matter through the first ventilation path, wherein the first ventilation path extends in a direction intersecting the gas permeable membrane and has an opening end leading to the external air or the internal space of the casing, wherein the second ventilation path extends in a direction non-parallel to the direction in which the first ventilation path extends and has an opening end leading to the internal space of the casing or the external air, at least a portion of the second ventilation path being formed by the inserted member, wherein the inserted member has a membrane supporting portion having the gas permeable membrane placed thereon and having a through hole formed thereto, and wherein the through hole constitutes a portion of the first ventilation path and communicates with the internal space of the casing or the external air via the second ventilation path.