Air intake hose for a vehicle

1. An air intake hose for a vehicle comprising:

a blow molding portion formed in a hollow hose shape by blow molding;

an injection molding portion formed in a hollow hose shape by injection molding; and

a coupling portion formed at one end of the blow molding portion,

wherein the blow molding portion and the injection molding portion are coupled with each other by injecting a material forming the injection molding portion into an injection mold in a state in which the coupling portion is inserted in the injection mold;

wherein a coupled surface is formed at an end of the coupling portion;

wherein an injection coupling portion coupled with the coupled surface is formed at the injection molding portion;

wherein a plurality of protrusions are protruded in an axial direction of coupling portion from the coupled surface;

wherein one surface of the injection coupling portion coupled with the coupled surface is formed corresponding to a shape of the coupled surface; and

wherein the protrusions are gradually widened in a circumferential direction of the coupling portion along a protruding direction.

2. The air intake hose of claim 1 , wherein bellows are formed at a part of the injection molding portion along a length direction thereof.

3. The air intake hose of claim 1 , wherein the injection molding portion is coupled with the blow molding portion so as to form an extended shape of the blow molding portion.

4. The air intake hose of claim 1 , wherein the coupling portion is inserted into the injection molding portion such that an exterior circumference of the coupling portion contacts an interior circumference of the injection molding portion.

5. The air intake hose of claim 1 , wherein materials of the blow molding portion and the injection molding portion are thermoplastics having the same polarity.

6. The air intake hose of claim 5 , wherein the material of the blow molding portion is polypropylene.

7. The air intake hose of claim 5 , wherein the material of the blow molding portion is nylon.

8. The air intake hose of claim 5 , wherein the material of the injection molding portion is a thermoplastic elastomer.

9. The air intake hose of claim 1 , wherein:

the injection molding portion includes first, second, and third injection molding portions; and

the blow molding portion includes first, second and third pipes,

wherein the second and third pipes are bifurcated from the first pipe to form a Y shape, and

wherein the first injection molding portion is coupled to an end of the first pipe, the second injection molding portion is coupled to an end of the second pipe, and the third injection molding portion is coupled to an end of the third pipe.

10. An air intake hose for a vehicle comprising:

a blow molding portion formed in a hollow hose shape by blow molding;

an injection molding portion formed in a hollow hose shape by injection molding; and

a coupling portion formed at one end of the blow molding portion;

wherein the blow molding portion and the injection molding portion are coupled with each other by injecting a material forming the injection molding portion into an injection mold in a state in which the coupling portion is inserted in the injection mold;

wherein the injection molding portion includes first, second, and third injection molding portions;

wherein the blow molding portion includes first, second and third pipes;

wherein the second and third pipes are bifurcated from the first pipe to form a Y shape;

wherein the first injection molding portion is coupled to an end of the first pipe, the second injection molding portion is coupled to an end of the second pipe, and the third injection molding portion is coupled to an end of the third pipe; and

wherein first, second and third bellows are formed at a part of the first, second and third injection molding portion respectively.