JPH09291915A - Resin flange and manufacture of resin pipe-like body equipped with flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin pipe-like body equipped with a flange wherein a weight is reduced, rust is prevented and the number of processes is reduced by joining a resin flange having a slope hole in a joined surface to the pipe end of a fiber reinforcing resin pipe-like body. SOLUTION: A resin flange 1 is composed of a disk part 11 having a center hole 10 and a short cylindrical part 12 protruded from an inner peripheral end in one surface of the disk part 11. A bolt hole 112 is provided in the disk part and a slope hole 111 is provided in a joined surface as a surface having the short cylindrical part 12. For the resin flange 1, a joined part is formed by inserting the short cylindrical part 12 into the pipe end part of the branch pipe of a T-shaped fiber reinforcing resin pipe-like body 2 and contacting a joined surface with the pipe end surface of the branch pipe of the T-shaped fiber reinforcing resin pipe-like body 2 so as to expose the slope hole 111. The joined part is covered with a non-hardened second resin 21. The second resin 21 is supplied into the slope hole 111 via a primer layer, hardened and stuck.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin flange and a method for manufacturing a resin tubular body with a flange.

[0002]

2. Description of the Related Art Conventionally, a steel flange shown in JIS B 2201 or the like has been used as a flange for connecting pipes to each other. Bolt-bonding or welding methods have been used. However, since the steel flange easily rusts and is heavy, it has required a lot of man-hours for production and construction. Therefore, a fiber-reinforced resin pipe with a flange using a fiber-reinforced resin has been widely used as a piping material for transporting a high-pressure fluid because of its high rigidity despite its light weight. A fiber-reinforced resin pipe connecting member is also used for connecting the fiber-reinforced resin pipe. The pipe connecting member made of fiber reinforced resin has been conventionally manufactured by the following method.

(1) A manufacturing method by molding using short fibers. (2) A manufacturing method by hand lay-up molding in which a fiber-reinforced resin is manually laminated on a mandrel.

By the way, the use of the fiber-reinforced resin tubular body has rapidly expanded in recent years, and all kinds of pipe connecting members are required. However, in the manufacturing method (1) by molding using short fibers, since the short fibers are laminated at the center, the tensile strength of the reinforcing fibers cannot be utilized. Therefore, sufficient strength cannot be obtained, and weeping and breakage easily occur.

Further, (2) the manufacturing method by hand lay-up molding is low in productivity because of manual work, and the cost is high. Further, since there are variations in performance due to individual differences among manufacturing workers, the stability and reliability of the product are extremely low.

There is a problem that it is difficult to form the flange portion. Further, there is a drawback in that the adhesiveness between the fiber-reinforced resins is poor in reliability, and that the fiber-reinforced resin is weak against shear stress.

Further, in manufacturing a fiber-reinforced resin tubular body with a flange, a flange mold is prepared for each diameter of the pipe, a flange is prepared by a casting or a hand lay-up method, and after the mold release, a hand lay-up method is performed. Due to this, the flange of the pipe was fixed by adhesion, but the number of steps was enormous.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a method for manufacturing a resin tubular body with a flange, which is lightweight, does not rust, has high product stability and reliability, requires a small number of steps, and a method for forming the flange. It is in the area of providing resin flanges.

[0009]

The resin flange according to the first aspect of the present invention (the invention according to claim 1) is provided with an inclined hole with respect to the joint surface.

The method for producing a resin tubular body with a flange according to the second aspect of the present invention (the invention according to claim 2) is such that when the resin flange of the first aspect and the fiber reinforced resin tubular body are joined, the resin flange and the fiber reinforced The flange is joined to the tube end of the fiber reinforced resin tubular body by coating the second resin on the joint portion with the resin tubular body and flowing the second resin into the inclined hole to solidify.

The resin used in the present invention 1 is a tube mainly made of synthetic resin, and examples of the synthetic resin include polyethylene, polypropylene, polystyrene, polyvinyl chloride,
Examples thereof include thermoplastic resins such as polyphenylene sulfide, thermosetting resins such as unsaturated polyester resins, phenol resins and urethane resins.

Among them, vinyl chloride resin is preferable in terms of flexibility and heat resistance. Reinforcing fibers, ultraviolet absorbers, stabilizers, flame retardants, fillers and the like may be added to these synthetic resins as needed. If the number of inclined holes is small, the anchor effect does not work effectively, and if the number of inclined holes is large, it becomes a starting point of fracture when stress is applied, so 5-12 per flange joint surface is preferable. The inclined hole is provided to allow the second resin to be joined to the fiber reinforced resin pipe described later to flow in and to give an anchor effect, but if the inclination angle θ is small, the anchor effect does not work effectively and it is large. Since it becomes difficult for the resin to flow in from the fiber-reinforced resin pipe side, 20 to 40 ° is preferable. The inclined hole may be treated with a primer such as urethane resin for the purpose of increasing the adhesive strength with the fiber-reinforced resin pipe, if necessary. In order to manufacture the resin flange, a conventionally known method such as lathing a commercially available hard vinyl chloride plate is appropriately used.

The fiber-reinforced resin tubular body used in the present invention 2 is mainly made of a material comprising the above-mentioned thermosetting resin and reinforcing fibers, and examples of the thermosetting resin include those mentioned above. Among them, unsaturated polyester resin is preferable in terms of workability. Examples of the reinforcing fiber include glass fiber, carbon fiber, aramid fiber and the like. Above all, glass fiber is preferable as the reinforcing fiber in terms of cost. As the glass fibers, glass chops, rovings, roving cloths, glass mats, etc. are appropriately used according to the purpose. The fiber-reinforced resin tubular body may be any of a straight pipe, a bent pipe, a T-shaped pipe, and the like, and a pipe joint such as a socket, an elbow, and cheese. The second resin is not particularly limited as long as it joins the resin flange and the fiber-reinforced resin tubular body, but from the viewpoint of adhesiveness and workability, an uncured resin of the same type as the fiber-reinforced resin tubular body is uncured. The thing is preferable. Further, it is preferable to provide a bolt hole penetrating the resin flange in order to impart the function as a flange by itself.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 (a) is a plan view of a resin flange according to the present invention 1, FIG. 1 (b) is a sectional view taken along the line AA 'of FIG. 1 (a), and FIG. 1 (c) is B of FIG. 1 (a). It is a -B 'sectional view. The resin (hard polyvinyl chloride) flange 1 has a disk portion 11 provided with a central hole 10, and a short tubular portion 1 provided on one surface of the disk portion 11 so as to project from the inner peripheral edge thereof.
Consists of two. A bolt hole 112 is provided in the disk portion, and an inclined hole 111 is provided in the joining surface, which is the surface on which the short tubular portion 12 is provided. The resin flange 1 is formed by lathing a commercially available hard vinyl chloride plate to form an outer periphery, and a center hole 1 is formed by drilling.
0, an inclined hole 111, and a bolt hole 112 are provided.

FIG. 2 is a cross-sectional view for explaining one step of the method of manufacturing a resin tubular body with a flange according to the present invention 2. The resin-made flange 1 is a short tubular portion 1 in a pipe end portion of a branch pipe of a T-shaped fiber-reinforced resin tubular body (made of fiber-reinforced polyester resin) 2.
2 is inserted, and the joint surface is brought into contact with the pipe end surface of the branch pipe of the T-shaped fiber-reinforced resin tubular body so that the inclined hole 111 is exposed to form the joint portion. The joint is uncured second
Cover with resin 21. The second resin 21 is provided on the joint surface with the resin flange by overlaying the resin forming the fiber-reinforced resin fiber tubular body 2.

As shown in FIG. 3, the second resin 21 flows into the inclined hole 11 through the primer layer 3 to be solidified and adhered. As a result, the resin flange 1 and the fiber-reinforced resin tubular body 2 are firmly joined.

[0017]

EFFECT OF THE INVENTION Since the resin flange of the present invention 1 is provided with the inclined hole with respect to the joint surface, it can be firmly joined when joining the fiber-reinforced resin tubular body, and the commercially available polychlorinated material is used. It can be easily made using a vinyl plate. The method for producing a resin tubular body with a flange of the present invention 2 is characterized in that when the resin flange of the present invention 1 and the fiber reinforced resin tubular body are joined, a second joint is formed at the joint portion between the resin flange and the fiber reinforced resin tubular body. Since the flange is joined to the tube end of the fiber-reinforced resin tubular body by coating the resin and flowing the second resin into the inclined hole and solidifying it, the fiber-reinforced resin in which the resin flange is firmly connected A tubular body is obtained. .

As a result, it becomes possible to supply a lightweight piping system in which the pipe body and the joint portion are made of resin.

[Brief description of drawings]

1A is a plan view of a resin flange 1 according to the present invention 1, FIG. 1B is a sectional view taken along the line AA ′ of FIG. 1A, and FIG.
FIG. 3 is a sectional view taken along line BB ′ of FIG.

FIG. 2 is a cross-sectional view for explaining one step of a method for joining flanged resin tubular bodies according to the present invention 2.

FIG. 3 is a cross-sectional view showing a state in which the overlaid second resin 21 flows into the inclined hole through the primer layer 3 and is solidified and bonded.

[Explanation of symbols]

 1 Resin Flange 11 Tilt Hole 112 Bolt Hole 2 Fiber Reinforced Resin Tubular Body 21 Second Resin 3 Primer Layer θ Tilt Angle

Claims (2)

[Claims] 1. A resin flange, wherein an inclined hole is provided with respect to the joint surface. 2. When joining the resin flange according to claim 1 and the fiber-reinforced resin tubular body, a second resin is coated on the joint between the resin flange and the fiber-reinforced resin tubular body,
A method for manufacturing a resin tubular body with a flange, characterized in that a flange is joined to a pipe end of a fiber-reinforced resin tubular body by flowing a second resin into the inclined hole and solidifying the second resin.