JPH10159665A - Intake manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake manifold having no unevenness of the adhesive strength, by making the thickness of an adhesive layer between the junction surface of an intake manifold main body and the junction surface of a flange member even. SOLUTION: The main body junction 4 of an intake manifold main body 1, and the flange junction 11 of a flange member 2, are joined through an adhesive 13. In this case, a plate form cut-out 6 is formed on the outer periphery side of the main body junction surface 5 of the main body junction 4, and the adhesive 13 is filled in the cut-out 6, as well as the inner periphery side of the main body junction surface 5 and the inner periphery side of the flange junction surface 12 are contacted closely, so as to joint both junctions 4 and 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake manifold, and more particularly to an intake manifold made of aluminum and joined with an adhesive.

[0002]

2. Description of the Related Art There is an intake manifold in which a divided intake manifold made of aluminum is joined via an adhesive as shown in the prior art of Japanese Patent Application Laid-Open No. 60-45771, which is manufactured by die casting. The intake manifold is divided into two parts, and then the divided intake manifolds are bonded and integrated using an adhesive.

[0003]

However, when the above-mentioned conventional intake manifold is bonded and integrated with an adhesive, the intake manifold is divided into two parts by attaching the intake manifold to a fixing jig and integrating them. It is difficult to keep the distance between the joining surfaces of the intake manifold constant, and the thickness of the adhesive layer becomes non-uniform, causing a problem in that the adhesive strength becomes uneven. Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to provide an intake manifold in which the thickness of the adhesive layer between the two joining surfaces is uniform and the adhesive strength is not uneven. And

[0004]

According to a first aspect of the present invention, there is provided an intake manifold in which opposed joints of a split intake manifold made of aluminum are joined through an adhesive, and one or both joint surfaces of the two joints are joined together. A plate-shaped notch is formed on the outer peripheral side, the inner peripheral sides of the two joining surfaces are closely contacted with each other, and the adhesive is filled in the notch on the outer peripheral side to join the two joints. I do. According to a second aspect of the present invention, in the intake manifold according to the first aspect, a groove-shaped adhesive reservoir is provided along an inner peripheral end of the cutout.

When an adhesive is applied to the plate-shaped notch of the divided intake manifold and the divided intake manifolds are integrated with each other, the inner peripheral sides of both joining surfaces are in close contact with each other, and the adhesive is attached to the notch on the outer peripheral side. The adhesive is filled, an adhesive layer having a uniform thickness is obtained, and the adhesive does not penetrate into the inner peripheral portions of the two joining surfaces. Further, when a groove-shaped adhesive reservoir is provided along the inner peripheral end of the notch, even if the adhesive protrudes from the notch, the adhesive is stored in the adhesive reservoir, It does not penetrate into the inner peripheral portions of the two joining surfaces.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When a notch is formed on one of the joining surfaces, the thickness of the notch is desirably 0.1 to 0.3 mm from the viewpoint of securing adhesive strength. When the notches are formed on both joining surfaces, it is desirable that the sum of the thicknesses of both the notches is 0.1 to 0.3 mm.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An intake manifold according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an intake manifold in which a two-part intake manifold for a four-cylinder automobile is joined via an adhesive, and comprises an intake manifold main body 1 and a flange member 2 facing the intake manifold main body 1. The main body 1 and the flange member 2 are each made of aluminum die casting.

FIGS. 1 to 4 show an intake manifold main body 1. The intake manifold main body 1 includes a shell-shaped main body 3 and a main body 3.
A plate-shaped notch 6 is formed on the outer peripheral side of the main body joint surface 5 of the main body joint 4, and an inner peripheral end of the notch 6. A groove-shaped adhesive reservoir 7 is provided along the portion. Reference numeral 8 denotes a through hole through which a bolt (not shown) for attaching the intake manifold to an engine block (not shown) is inserted. The eight through holes 8 protrude outward from the main body joint 4. 9, respectively.

FIGS. 1 to 3 show a flange member 2 having four branch pipes 10 formed on the upper side of the flange member 2 and a flat flange joint 11 formed on the lower side. The branch pipe portion 10 and the flange joint portion 11 are integrally formed. The flange joining surface 12 of the flange joining portion 11 is formed in a flat shape. When the intake manifold body 1 and the flange member 2 are combined via the joining surfaces 5 and 12, a gap 14 for accommodating the adhesive 13 is formed. You. Reference numeral 15 denotes a through hole through which a bolt (not shown) for attaching the intake manifold to an engine block (not shown) is inserted.
The through holes 15 are respectively formed in eight protrusions 16 (only four on one side are shown) projecting outward from the branch pipe portion 10.

As shown in FIG. 4, the intake manifold body 1
After applying the adhesive 13 to the notch 6 of the body joining surface 5 of
Body joining surface 5 of intake manifold body 1 and flange member 2
The flange member 2 is placed on the intake manifold 1 such that the flange joining surface 12 is overlapped with the flange member 2. next,
The adhesive 13 is hardened in a state where the joints 4 and 11 are pressed and the inner peripheral portion of the main body joint surface 5 and the inner peripheral portion of the flange joint surface 12 are in close contact with each other. When the member 2 is bonded and integrated, the notch 6 is filled with the adhesive 13 to obtain an adhesive layer having a uniform thickness.
For example, even if the adhesive 13 protrudes from the notch 6, the adhesive 13 is stored in the adhesive reservoir 7, and does not enter the inner peripheral portions of the joint surfaces 5 and 12.

[0012]

As described above, according to the first and second aspects of the present invention, since the thickness of the adhesive layer is uniform and the adhesive strength is not uneven, a stable intake manifold having high adhesive strength is provided. Is obtained. According to the second aspect of the present invention, even if an excessive amount of adhesive is applied to the notch, the excess adhesive is stored in the adhesive reservoir, so that the adhesive does not protrude into the intake passage. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an intake manifold showing a state in which an intake manifold divided into two is joined via an adhesive.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a plan view showing a state where an adhesive is applied to the intake manifold body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake manifold main body 2 Flange member 3 Main part 4 Main body joint part 5 Main body joint surface 6 Notch part 7 Adhesive reservoir 11 Flange joint part 12 Flange joint surface 13 Adhesive

Claims (2)

[Claims] 1. An intake manifold in which opposed joints of an aluminum split intake manifold are joined via an adhesive, and a plate-shaped notch is formed on an outer peripheral side of one or both joint surfaces of the two joints. An intake manifold in which the inner peripheral sides of the two joining surfaces are in close contact with each other, and the notches on the outer peripheral side are filled with an adhesive to join the two joining parts. 2. The intake manifold according to claim 1, wherein a groove-shaped adhesive reservoir is provided along an inner peripheral end of the notch.