Method for manufacturing waterproof duct and waterproof duct

Abstract

The present invention provides a method for manufacturing a waterproof duct and the waterproof duct. The method may include (a) laminating a waterproof film on one side of a first nonwoven fabric andlaminating a second nonwoven fabric on the waterproof film laminated on the first nonwoven fabric to form a laminated body; (b) forming a waterproof felt base material by thermally adhering the laminated body; (c) cutting the waterproof felt base material into a desired shape; (d) molding the duct while surrounding the waterproof felt base material cut into the desired shape around the external surface of a molding jig having a worm gear shape; (e) heat-treating the molded duct; (f) cooling the heat-treated duct; and (g) ejecting the cooled duct from the molding jig.

Description

technical field [0001] The present invention relates to a waterproof felt pipe, and more particularly, to a method for manufacturing a waterproof felt pipe having waterproofness in the pipe itself, and a waterproof felt pipe manufactured by the method. Background technique [0002] Generally, when fuel and air are required to operate an internal combustion engine as a power source to drive a vehicle, normal outside air is supplied to the engine from outside it through an intake system. [0003] The air intake system of the vehicle may include: a duct provided as a flow path of outside air, an air filter having a function of filtering foreign matter such as dust or sand contained in the inflowing air, and a plurality of units such as for reducing sound-absorbing panels for vibration and noise, etc.), in which polyurethane coverings are separately applied to the intake system to prevent the inflow of foreign substances and provide a waterproof function. [0004] However, sinc...

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Problems solved by technology

[0004] However, since the intake system is provided with a cover having a large volume, there are some problems in that: it is difficult to arrange the intake system freely inside the engine room; production efficiency is lowered due to a separation process for assembling the cover; And the deterioration of the ducts of the intake system that occurs due to the hydrolysis and damage of the ducts due to the moisture that enters from the outside air over time, etc. (even if the cover has a waterproof function)

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