JP3314402B2 - Resin pressure vessel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure vessel made of resin, and can be used for a positive or negative pressure tank or an intake manifold made of resin.

[0002]

2. Description of the Related Art As a prior art of a pressure vessel made of resin, there is a "hollow body of plastics material" disclosed in Japanese Patent Application Laid-Open No. 59-198116. This conventional technique will be described with reference to FIG. 4. Two resin members 71 and 72 are brought into contact with contact surfaces 75 and 76 of flanges 73 and 74, respectively, and an exterior member 77 is molded in a pressurized state. The resin members 71 and 72 are fixed so as not to be separated from each other. Here, the contact surfaces 73 and 74 respectively have recesses 7
8 and 79, a spring force is generated in the flanges 73 and 74 by the above-described pressurization, and the contact surfaces 7 and 79 are formed.
The airtightness between 5,76 is improved. Therefore, the resin member 7
The fluid in 1,72 does not leak to the outside.

[0003]

However, since the two resin members 71 and 72 are fastened by the above-described method, the resin members 71 and 72 are attached to the fastening portion by thermal contraction such as thermal shock. , 72 are separated from each other, the spring effect of the concave portions 78, 79 is lost or the fastening is loosened, so that the hermeticity is impaired.

[0004] In addition, if the dimensional accuracy and the surface accuracy of the contact surfaces 75 and 76 are not improved, the airtightness here cannot be sufficiently achieved.

Further, there is a problem that the final product size cannot be reduced due to the presence of the concave portions 78 and 79.

Accordingly, an object of the present invention is to improve the fastening structure of a resin pressure vessel comprising a plurality of resin members.

[0007]

Configuration of the Invention

[0008]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problem of the present invention comprises a plurality of resin members provided with a flange having a contact surface, and a plurality of resin members. A resin pressure vessel is formed from an uneven portion formed on an outer peripheral surface and an outer member formed on an outer peripheral portion of a flange by resin molding in a state where contact surfaces of a plurality of resin members are in contact with each other . The melting point of the member is equal to or lower than the melting point of the exterior member, and the irregularities are welded to the exterior member during resin molding.

[0009]

According to the above-mentioned technical means of the present invention, the resin member and the exterior member are partially welded to each other at the uneven portion,
The plurality of resin members are firmly adhered to each other and their airtightness is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the technical means of the present invention will be described below with reference to the accompanying drawings.

When the resin pressure vessel 10 of the first embodiment of the present invention shown in FIGS. 1 and 2 is constructed, first, a plurality of resin members 11 and 12 are brought into contact with each other. Flanges 15, 16 with faces 13, 14
Are formed, and uneven portions 17, 18 are formed on the outer peripheral surfaces of the flanges 15, 16, respectively. Then, contact surface 1
While the members 3 and 14 are in contact with each other, the resin members 11, 1
By molding a resin material having the same or higher melting point as that of the resin members 11 and 12 of the same material or the same type as that of the resin members 11 and 12,
An exterior member 19 is formed on the outer periphery of the flanges 15 and 16,
The resin members 11 and 12 are fastened to each other. Here, 6-nylon or the like is used as the resin members 11 and 12, and 6-nylon or 66-nylon or the like is used as the exterior member 19.

At the time of molding the exterior member 19, since the exterior member 19 has the same or higher melting point as that of the resin members 11 and 12, it melts well with each other particularly at the thinned uneven portions 17 and 18. Accordingly, the resin members 11 and 12 are firmly adhered to each other, and the airtightness at the fastening portion is sufficiently ensured and maintained.

Since the uneven portions 17 and 18 are portions for ensuring the airtightness of the pressure vessel 10 made of resin, the uneven portions 1
It is desirable that the reference numerals 7 and 18 be as close as possible to the ends on the contact surfaces 13 and 14 side on the outer peripheral surfaces of the flanges 15 and 16 respectively. The shape of the concave and convex portions 17 and 18 may be an acute angle or a rectangular shape as shown in FIG. 2, and may be any shape as long as the shape is excellent in welding to the exterior member 19.

FIG. 1 shows an embodiment in which a resin pressure vessel 10 is used as a negative pressure tank 28 of an engine (not shown).
The resin member 11 exhibits a bottomed shape having a hollow portion 24,
First the resin member 12, second port 21 and 22 are formed. The first port 21 is provided with a check valve 23 and connected to a negative pressure source such as an intake manifold (not shown) of the engine. On the other hand, to the second port 22 via a three-way valve 25,
For example, the negative pressure chamber 2 of the diaphragm type actuator 26
7 is connected. Here, resin members 11 and 12
Since the members are securely fastened and the airtightness is secured, the negative pressure stored in the negative pressure tank 28 does not leak. Incidentally, if the direction of the check valve 23 is reversed, it naturally acts as a positive pressure tank.

On the other hand, FIG. 3 shows an embodiment in which the resin pressure vessel 10 is used as an intake manifold 29 of an engine, and an intake air passage 30 is formed by the resin members 11 and 12.

[0016]

As described above, in the present invention, the resin member and the exterior member are partially welded to each other in the concave and convex portions, and the plurality of resin members are firmly adhered to each other to form the resin pressure vessel. Is done. Further, since the airtightness is improved by this welding, strict precision is not required for the surface roughness of the contact surface of the flange.

[0017] In addition, in the case of an intake manifold having a complicated shape such as an intake manifold, the casting cost or the injection molding is conventionally performed by melting a core mold or the like. ADVANTAGE OF THE INVENTION By this invention, the reliability of ensuring airtightness between resin-made members was improved, and it became possible to manufacture even what could not be manufactured by fastening between members.

[Brief description of the drawings]

FIG. 1 is a sectional view of a resin pressure vessel according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part in FIG.

FIG. 3 is a sectional view of a resin pressure vessel (intake manifold) according to an embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part of a hollow body made of a plastic material according to the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Resin pressure vessel, 11, 12 Resin member, 13, 14 Contact surface, 15, 16 Flange, 17, 18 Uneven part, 19 Exterior member,

Continuation of front page (56) References JP-A-59-198116 (JP, A) JP-A-62-218117 (JP, A) JP-A-63-57222 (JP, A) JP-A-5-112306 (JP, A) , A) (58) Fields studied (Int. Cl. ⁷ , DB name) B29C 45/00-45/84 B29C 65/00-65/82

Claims (2)

(57) [Claims] 1. A plurality of resin members having a flange having a contact surface formed thereon, an uneven portion formed on an outer peripheral surface of the flange, and a state in which the contact surfaces of the plurality of resin members are in contact with each other. and a package member which is molded into the flange outer periphery by resin molding Te, the melting point of the resin member is lower than the melting point of the melting point equal to or the outer member of the outer member, the uneven portion when the resin molding Are welded to the exterior member. 2. The resin pressure vessel according to claim 1, wherein the uneven portion is formed at a portion of the outer peripheral surface of the flange near an end on the contact surface side.