JPH0885158A - Manufacture of tubular unit with fiber-reinforced resin flange - Google Patents

Abstract

PURPOSE: To manufacture a tubular unit with a fiber' reinforced resin flange with excellent productivity by preventing blushing in the unit with the flange in which the damage of the flange can be sufficiently avoided. CONSTITUTION: The method for manufacturing a tubular unit with fiber- reinforced resin flange comprises the steps of winding to laminate a material on a mandrel 1 having a collar plate 15 at one end side and coupled to a rotary unit at one end side to form an uncured tube body 210, disposing the material winding position at the final time of the forming at the plate 15 side, then mounting a template 51 on the uncured tube body 210, further winding the material between the plate 15 and the template 51 to form an uncured flange, then curing the entire resin by heating, and then releasing the template 51 and the mandrel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced resin flanged tubular body, for example, a fiber-reinforced resin flanged pipe joint.

[0002]

2. Description of the Related Art Conventionally, in the case of manufacturing a flanged pipe made of fiber reinforced resin (hereinafter referred to as FRP), a FRP flange member is separately manufactured and the FRP flange member is bonded to an already molded and cured FRP pipe. (For example, Japanese Examined Patent Publication No. 2-29916), or by mounting two template plates for forming a flange on the end of the FRP tube that has already been molded and cured, and curing by filling the space between these template plates. A fibrous material impregnated with a water-soluble resin, cure the resin of the wound body, and then remove the template (for example, Japanese Patent Laid-Open No. 2-300592).
Etc. are known.

As is well known, a FRP tubular body is
In particular, when used under pulsating load conditions, for example, when used as a pipe joint for a water pipe, a phenomenon that internal water leaks in a sweating state, that is, a weeping phenomenon occurs, and this weeping phenomenon causes the internal pressure of the pipe to be used. Are often limited.

[0004]

In the above-mentioned conventional FRP flanged pipe, the interface between the pipe body and the flange is adhered by an adhesive agent between cured bodies or the FRP material is cured and adhered to the cured body. Since it is so-called secondary adhesion, and it is difficult to expect effective interdiffusive bonding due to entanglement of polymer chains, the strength of the interface, particularly the shear strength, cannot be said to be sufficient. Even in this case, if the internal pressure to be used is determined by the weeping of the FRP pipe main body, even the above-described conventional FRP flanged pipe does not cause a problem of flange breakage.

However, when the weeping preventing means is added to the FRP pipe main body, it is presumed that there are many cases in which the interface breakdown between the pipe main body and the flange becomes a problem as a result of an increase in the internal pressure used. To be done.

Further, since the thermosetting resin is used as the matrix of the FRP, troubles due to curing shrinkage of the resin are unavoidable. Usually, a thermosetting resin and a low-contraction agent having good compatibility are mixed. Although we are aiming for low shrinkage, in this case, large stress is generated in the template contact area where the low shrinkage effect is maximum, delamination is caused, light transmission is reduced, and light reflection at the peeling interface It may turn white due to the above, and a template for flange molding is attached to the above-mentioned molded and cured FRP pipe,
When a curable resin-impregnated fiber material is wound between these mold plates, and the mold plate is released after curing of the wound body (for example, Japanese Patent Laid-Open No. 2-300592), at the time of curing or releasing. , F
Excessive stress acts on the interface between the RP flange portion and the template and the interface between the FRP flange portion and the pre-cured tube body, and whitening is likely to occur. Especially when a pigment is used, the whitening portion and other The difference in color from the part becomes noticeable, and gel coat coating is often unavoidable later.

Furthermore, in any of the above-mentioned publicly known examples, it is difficult to make the molding process of the pipe main body part and the molding process of the flange part continuous, and there is a problem in productivity. However, since the tube body and the flange are separately cured, there is duplication or waste in the curing process, and the template cannot be used for the next molding until the curing is completed. The turnover rate is poor, which also causes low productivity.

The object of the present invention is to install a wire in the FRP tube body.
A fiber-reinforced resin flange capable of producing a tubular body with a fiber-reinforced resin flange with good productivity, which is capable of sufficiently avoiding breakage at the flange portion even when a ping generation preventing means is added to increase the working internal pressure of the FRP pipe. It is intended to provide a method for manufacturing a tubular body with a cover.

Further, an object of the present invention is to provide a fiber reinforced resin capable of sufficiently avoiding breakage at the flange portion even when the internal pressure of the FRP pipe is increased by adding a weeping generation preventing means to the FRP pipe main body portion. It is an object of the present invention to provide a method for producing a tubular body with a flange made of a fiber-reinforced resin, which is capable of producing a tubular body with a flange made of fiber with good productivity and also with good prevention of whitening.

[0010]

The method for manufacturing a tubular body with a fiber reinforced resin flange according to claim 1 or 2 of the present application has a collar plate on one end side and connects the one end side to a rotating machine. The curable resin-impregnated fiber material from the feeder eye is wound and laminated on the mandrel to form an uncured tube body, and the winding point of the curable resin-impregnated fiber material at the end of this formation is on the collar plate side. Then, the template for forming the flange is sandwiched with the curable resin-impregnated fibrous material together with the collar plate and mounted on the uncured pipe main body. A curable resin-impregnated fiber material from the above feed eye is wound in between to form an uncured flange portion, after which the entire resin is cured by heating, and then the template and mandrel are demolded. Or, form an uncured flange in the same manner as above, Runochi, upon removal of the template to cure the whole of the resin by heating, then, is a construction characterized by demolding the mandrel.

According to a third aspect of the present invention, in a method for manufacturing a tubular body with a fiber reinforced resin flange, a curable resin-impregnated fiber material from a feeder eye is wound and laminated on a mandrel having a collar plate on one end side. Form the uncured tube body, position the winding point of the curable resin-impregnated fiber material at the end of this formation on the collar plate side, and then insert the split mold plate for flange formation into the curable resin impregnation. The fibrous material is sandwiched between the brim board and the uncured tube main body portion, and the curable resin-impregnated fibrous material from the feeding eye is wound between the brim board and the template. An uncured flange is formed, after which the split mold plate is removed, the entire resin is cured by heating, and then the mandrel is released from the mold.

The structure of the present invention will be described below with reference to the drawings. FIG. 1A shows an outline of an ordinary filament winding (hereinafter, referred to as FW) apparatus used in the method for producing a tubular body with a fiber-reinforced resin flange according to the present invention, in which a continuous fiber material is drawn from a bobbin 11. Then, the continuous fiber material is impregnated with a curable resin in a resin impregnation tank 12, and the curable resin-impregnated continuous fiber material passes through a feeder eye 13 and a rotary machine as shown in FIG. The mandrel 1 which is rotating is wound and laminated by 14.

In the feed eye 13, as shown in FIG. 1B, a curable resin-impregnated fiber material is wound at a predetermined winding angle and in a laminated layer in accordance with the FRP-made tubular body with a flange. So that it can be wound in several numbers, forward and reverse running in the X axis direction parallel to the rotation axis of the mandrel 1, forward and reverse running in the Y axis direction with respect to this X axis, and forward and reverse running in the Z axis direction, Z
Forward / reverse rotation (U movement) on a plane perpendicular to the axis and forward / reverse rotation (V movement) on a plane perpendicular to the Y axis are possible.

Normally, a servo is used to control these running and rotating.
Vomoters are used. As a control method, a feedback method using a proximity switch or the like, or a teach-in playback method in which a computer controls a moving coordinate in advance according to a program are used.

FIG. 2 shows a FR as an example of a tubular body with a flange made of fiber reinforced resin, which is an object to be manufactured by the manufacturing method of the present invention.
The pipe joint 2 with a flange made of P is shown. In FIG. 2, reference numeral 21 is a joint main body made of FRP. Reference numeral 20 is a molded body for preventing weeping which is fixed to the inner surface of the receiving port, and has a rubber ring mounting groove and a retaining ring mounting groove.
Reference numeral 22 denotes a FRP flange portion provided at the rear end of the joint body 21.

In connection of the pipe with the flanged pipe joint, as shown in FIG. 3, a pipe 32 having a flange 31 at one end, for example, a pipe end flange of a cast iron pipe for water pipes, is provided with a flange portion 22 of the pipe joint 2. Are connected by a bolt 34 via a packing 33, and a water pipe FRP pipe 35 is attached to a receiving port of the pipe joint 2 with a rubber ring 36 and a retaining ring 3.
It is connected by a plug-in method through 7. In this case, the weeping prevention molded body 20 includes the retaining ring 37 on the FRP surface of the pipe joint 2, the rubber ring 36, and the water pipe FR.
It prevents microcracks of FRP due to direct contact with the end of the P pipe, etc., and prevents the pipe joint 2 from weeping due to the excellent water-tightness of the molded body 2 itself, enabling a high internal pressure to be used. .

In order to manufacture the above-mentioned flanged pipe joint according to the first aspect of the present invention, first, as shown in FIG. 4 (a), a flange portion 15 is provided on one end side and a fiber joint is provided on the other end side. On the other end of the mandrel 1 to which the stopping jig 41 is detachably attached, the weeping prevention molded body 20 is supported via a spacer 42, and the central shaft 111 on one end side of the mandrel 1 is FW.
It is connected to the shaft of the rotating machine [14 in Fig. 1B] of the device.

Next, in the same FW apparatus, continuous fiber material is pulled out from the bobbin, and the fiber material is passed through a resin impregnation tank to be impregnated with a curable resin. The curable resin-impregnated fiber material a is shown in FIG. As shown in (b), feed eye 13
Under traversing at least in the X-axis direction, it is wound around the rotating mandrel 1 and is rewound by being hooked on the pins of the fiber locking jigs 41 to give a predetermined winding angle and a predetermined winding angle. The uncured pipe joint main body 210 is formed by winding and laminating in the number of laminated layers. In this case, the fiber is not wound around the collar plate on the one end side of the mandrel 1, and because of the pin of the fiber locking jig 41, it is attached to the protruding shaft 112 on the other end side of the mandrel 1. There is no need to wind the fibers, and it is not necessary to remove the adhered and hardened FRP at the time of reusing the mandrel after the completion of curing, which will be described later. , Each time it is replaced).

The uncured pipe joint body 210
When the curable resin-impregnated fibrous material a reaches the collar plate 15 side of the uncured pipe joint main body 210 at the final stage of the formation of (1), the mandrel 1 is temporarily stopped from rotating, and (c) in FIG.
As shown in FIG. 5, a flange forming template 51 is mounted on the pipe joint main body 210 at a position before the collar plate 15, and a flange is formed.
A portion a ′ of the curable resin-impregnated fiber material a in the vicinity of the pipe joint main body portion extending from the dough eye 13 to the uncured pipe joint main body portion 210 is sandwiched between the template 51 and the collar plate 15. As shown in FIG. 4C, a template 51 having an arm 52 is used, and the arm is clamped to the projecting shaft 112 on the other end side of the mandrel 1 by bolting. (Because there is no winding of the resin-impregnated fiber material around the protruding shaft 112, clamping is easy).

The template 51 and the uncured pipe joint body 210
A release agent is preferably applied to the contact surface with the mold plate 51, the inner surface of the mold plate 51, and the inner surface of the collar plate 15 in order to facilitate demolding.

When the template 51 is mounted as described above, the rotation of the mandrel 1 is restarted, and the curable resin-impregnated fiber material is usually wound in a circumferential winding between the template and the collar plate. Form a cured flange.

After that, the uncured semi-finished product is carried into the heating furnace together with the mandrel, the resin is cured, the template and the mandrel are demolded from the cured product, and both ends of the cured product are trimmed. Then, the production of the FRP flanged pipe joint is completed.

The above FRP according to the invention of claim 2
In order to manufacture a flanged pipe joint, the uncured FRP flange portion is formed in the same manner as above, and after the formation of this uncured FRP flange portion, the template 51 is not removed yet. The semi-finished product of curing is carried into the heating furnace together with the mandrel, the resin is cured, the mandrel is demolded from this cured product, and both ends of the cured product are trimmed.
Finished manufacturing FRP flanged pipe joints.

The above FRP according to the invention of claim 3
In order to manufacture a flanged pipe joint, as shown in FIG. 5A, a flange is provided on one end side (either the side connected to the shaft of the rotating machine of the FW device or the opposite side). Molded body 20 for preventing weeping is provided on the other end of the mandrel 1 having the portion 15 and the fiber locking jig 41 removably attached to the other end.
After attaching via the spacer 42,
The curable resin-impregnated fiber material a is wound around the rotating mandrel 1 while traversing the feed eye 13 in at least the X-axis direction, and hooked on the pin of each fiber locking jig 41. The uncured pipe joint body 2 is rewound and wound and laminated with a predetermined winding angle and a predetermined number of laminated layers.
10 is formed, and when the curable resin-impregnated fiber material a reaches the collar plate 15 side of the uncured pipe joint body 210 at the final stage of forming the uncured pipe joint body 210, the mandrel is temporarily 1 is stopped, and as shown in FIG. 5B, the split mold plate 5 for flange formation as shown in FIG.
Ten pieces (preferably two pieces shown in the drawing are preferable, but it is also possible to make a split structure of two or more pieces) on the pipe joint main body 210 at a position before the collar plate 15 (the ear portion 511). Can be embraced by bolting), and the portion a ′ near the pipe joint main body portion of the curable resin-impregnated fiber material a extending from the feed eye 13 to the uncured pipe joint main body portion 210 and the template 510 and the collar. It is preferable that the mandrel 1 is sandwiched between the plate 15 (a split mold plate 51 having an arm 52 is used, and this arm is clamped to the mandrel shaft 111), and the mandrel 1 is rotated. Resuming, the curable resin-impregnated fiber material a is normally wound between the template plate 510 and the collar plate 15 by circumferential winding to form an uncured flange portion. After the formation of the uncured FRP flange portion, , Uncured semi-finished product with the template 510 removed It is carried into a heating furnace together with the drel, the resin is hardened, the mandrel is demolded from this hardened body, and both ends of the hardened body are trimmed, whereby the production of the FRP flanged pipe joint is completed.

[0025] In the present invention, winding angle of the cured resin impregnated fiber material for the tube body portion formed, usually, ± 30 ⁰ ~
Is a ± 75 ^0, winding angle of the cured resin impregnated fiber material for the flange portion formation is usually substantially 90 ^0.
In this case, it is preferable to rotate the feed eye forward and backward in a plane perpendicular to the Y axis, for example, the winding angle is ± 30 ^0.
(With respect to the direction of the rotation axis of the mandrel, and the counterclockwise direction +), it is preferable to incline within the range of ± 60 ^0. By doing so, the sliding movement of the curable resin-impregnated fiber material in the slit of the feed eye can be prevented [in (B) of FIG. By tilting 13 upward, the slipping of the fiber in the slit 131 in the −X direction can be prevented), and the uniformity of the winding density of the curable resin-impregnated fiber can be improved.

Examples of the FRP fiber material (continuous fiber material) include roving fiber and roving cloth station.
, Glass cloth tape, interlaced tape, chopped strand tape, continuous tape and the like can be used.

Examples of the material of these fibrous materials include inorganic fibers such as glass fibers and carbon fibers, and organic fibers such as aramid fibers and polyethylene terephthalate fibers. Examples of the curable resin include unsaturated polyester resin, vinyl ester resin, phenol resin, epoxy resin, and the like, and photocurable resin that is cured by ultraviolet irradiation can also be used. If necessary, a shrinkage reducing agent, a filler, a pigment or the like can be added to these curable resins.

In the above-mentioned molded body for preventing weeping, it is required to have a dense resin structure, and the molding is performed by a vacuum molding method (using a vacuum molding die for a plastic plate original fabric). , Vacuum suction molding under heating to cut the end surface of the molded product), blow molding method (expand the ballison from the extruder and mold with a blow molding die, cut the end surface of the molded product) or injection Molding method can be used,
In order to ensure the dimensional accuracy in inserting the tube insertion port into the tube receiving port, it is preferable to use an injection molding method or a vacuum forming method having excellent inner diameter dimensional accuracy.

The resin of the molded body for preventing weeping may be any resin that can be molded into the shape of the inner surface of the receiving port of the pipe or the pipe joint, and specifically, epoxy resin, unsaturated polyester, vinyl ester. Resin, thermosetting resin such as phenol resin, polyvinyl chloride, chlorinated polyvinyl chloride, polyethylene, polypropylene, acrylonitrile-butadiene-styrene copolymer, polystyrene, polycarbonate, polyamide, polyvinylidene fluoride, Thermoplastic resins such as polyphenylene sulfide, polysulfone, and polyether ether ketone can be used.

The mandrel is made of a material having high rigidity and light weight, such as mild steel (SS) and stainless steel (S).
US), aluminum, metals such as duralumin, rubber materials such as urethane, and blow molding dies such as polypropylene and polyethylene can be used.

Although the above description has been made in the case where the flanged tubular body is a flanged socket pipe joint, the present invention is a flanged bend pipe, T-shaped pipe, short pipe,
It can also be applied to the manufacture of flanged pipe joints such as reducers, internal pressure pipes such as water pipes, and other tubular structures to be flange-joined. In these FRP flanged tubular bodies, the outer diameter of the flange portion is usually 1.1 to the inner diameter of the pipe body portion of the flange portion so that the bolt can be fastened.
1.7 times.

[0032]

When the curable resin-impregnated fiber material is wound to form the flange portion, the pipe main body is still in an uncured state. Can be sufficiently intertwined with each other to be molecularly integrated, and the adhesion at the boundary between the pipe body and the flange becomes strong. Therefore, even if the weeping prevention means is added to the FRP pipe body, and the internal pressure to be used for the flanged FRP pipe can be determined depending on the stress state of the FRP flange,
It is possible to provide a FRP flanged tubular body that can deal with this.

Further, since the tube body and the flange can be continuously molded by using a common filament winding apparatus and the tube body and the flange can be cured at the same time, the productivity can be improved. A flange plate is provided at one end of the mandrel, and one end side of the mandrel is connected to the rotary shaft of the filament winding device.Therefore, when mounting the template facing the flange plate, a free space on the other end side of the mandrel is provided. It can be used as a work space, and when a two-part mold plate is used as the mold plate, it can be easily attached and detached, so that workability can be improved in this respect as well.

In particular, in the invention according to claim 2, the uncured semi-finished product is carried into the curing furnace with the template removed, but the collar plate of the mandrel supports the FRP flange until curing. The flange portion can be satisfactorily molded. In addition, since the flange portion is cured with the template removed, it is possible to reduce curing shrinkage and stress generated during mold release, suppress delamination at the FRP flange portion, and prevent whitening well.

Further, in the invention according to claim 3, since the flange portion is cured with the template removed,
Curing shrinkage and stress generated during mold release can be reduced, delamination at the FRP flange can be suppressed, whitening can be prevented well, and since a split mold plate is used for the mold plate, the mold plate can be attached and detached. It is easy and the mold plate released before the curing step can be put on standby for the next use, and the productivity can be improved in terms of the rotation rate of use of the mold plate.

[0036]

Embodiments of the present invention will be described below. [Embodiment 1] This is an embodiment of the invention according to claim 1, and the product is a flanged pipe joint shown in Fig. 2 having a nominal diameter of 150, an outer diameter of the flange portion of 300 mm, and a thickness of the flange portion of 26 mm.

As the weaving preventing molded body 20, a blow molded product of a vinyl chloride resin sheet having a thickness of 1 mm was used. The fiber is glass fiber roving (count 45000g
/ Km) was used. The curable resin composition includes an ortho unsaturated polyester resin (containing about 40% styrene and 6% cobalt naphthenate) 100
Parts (parts by weight, the same applies hereinafter), 17 parts of a styrene-vinyl acetate copolymer as a shrinkage reducing agent, 3 parts of duck as a pigment, and 0.7 parts of methyl ethyl ketone peroxide as a curing agent. . The content of the glass fiber roving in the resin-impregnated fiber bundle was 60% by volume.

First, the outer recess of the weeping-preventing molded body is filled with a hoop winding to make it smooth, and a helical winding with a thickness of 4 mm ± 60 ⁰ is then formed to form a pipe joint body. Next, a mold plate (using the split mold plate of FIG. 6) was mounted so that the flange thickness was 26 mm, and the flange was formed by hoop winding. After that, in a curing furnace at 70 ° C., 1 After curing in time, the template and mandrel were removed from the mold, and both ends were trimmed to obtain a product.

[Embodiment 2] This is an embodiment of the invention described in claim 2 and is the same as Embodiment 1 up to the formation of the flange portion,
After forming the flange part, after removing the template,
In the curing furnace, curing was performed at 70 ° C. for 1.0 hour, the mandrel was removed from the mold, and the other processes were the same as in Example 1. The weaving-preventing molded product, fibers, curable resin composition, type and size of the product used were the same as in Example 1.

[Comparative Example 1] The same procedure as in Example 1 was performed until the formation of the pipe joint main body, and after the pipe joint main body was formed, it was cured in a curing furnace at 70 ° C for 1 hour, and then cured FRP. The template is attached to the mandrel with the pipe joint main body attached, set again in the filament winding device, an uncured flange portion is formed in the same manner as in Example 1, and the mandrel is again loaded into the curing furnace. After curing at 70 ° C. for 1 hour, the template and the mandrel were removed from the mold, and both ends were trimmed to obtain a product. Molded body for weeping prevention,
The fiber, curable resin composition, product type and size, etc. were the same as in Example 1.

[Comparative Example 2] The same procedure as in Example 1 was performed until the formation of the pipe joint main body, and after the pipe joint main body was formed, it was cured at 70 ° C for 1.0 hour in the curing furnace to remove the mandrel. Molded to obtain a hardened FRP pipe fitting body. On the other hand, a flange forming mold assembled from a collar plate and a mold plate is mounted on a mandrel to form an uncured flange, which is cured in a curing furnace at 70 ° C. for 1.0 hour, and then demolded to cure FRP.
The flange made. Then, a cured FRP flange was bonded to the cured FRP pipe joint body with an adhesive to obtain a product. The weaving-preventing molded product, fibers, curable resin composition, type and size of the product used were the same as in Example 1.

In Examples 1 and 2, the total time required for molding the pipe joint body and the flange was about 9 minutes, but in Comparative Examples 1 and 2, the pipe joint body and the flange were formed. The total time required for molding the flange portion reached as high as 30 minutes due to the time loss due to interruption of filament winding.

In the first and second embodiments,
The time required for curing was 60 minutes, but in Comparative Example 1 and Example 2, since the pipe joint body and the flange were individually cured, the total time required for curing was 120 to 1
It has reached 30 minutes.

Regarding the whitening of the flange portion, whitening was observed in 20 of 50 in Example 1 and zero in Example 2, whereas in Comparative Example 1, the flange portion and the pipe joint body were In the comparative example 2, remarkable whitening was observed at the boundary with the part (it is presumed that excessive stress acts on the boundary because the flange part is formed and hardened in the cured pipe joint body). Significant whitening was observed on both sides of the flange.

Further, a lid plate is attached to the flange portion of the joint of each example product and each comparative example product with a bolt through a packing, and a short pipe having a pressure pipe connected to one end is shown in the joint receiving port in FIG. As described above, when the hydrostatic pressure fracture test was conducted by connecting the packing and the retaining ring, no abnormality was observed in both the example products 1 and ² under the water pressure of 40 kg / cm ² . In Comparative Example 1 and Comparative Example 2, the joint between the flange portion and the joint body portion was broken at a water pressure of approximately 20 kg / cm ² .

[0046]

According to the present invention, the internal pressure for use is increased by adding the weeping preventing means to the FRP pipe body,
Even when the internal pressure of the FRP pipe can be determined by the stress acting on the FRP flange part, the FRP flanged tubular body that can give sufficient pressure resistance to the flange part is eliminated with whitening and has good productivity. Since it can be manufactured, it is extremely useful for increasing the internal pressure of the FRP flanged pipe.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an FW apparatus used for manufacturing an FRP flanged tubular body of the present invention.

FIG. 2 is a sectional view showing a part of a FRP flanged pipe joint manufactured according to the present invention in a side view.

3 is a cross-sectional view showing a part of a side view of the pipe joint shown in FIG. 2 in use.

4 (a) and 4 (b) are explanatory views showing a method for manufacturing the FRP flanged tubular body according to claim 1 of the present invention, wherein (a) of FIG. 4 is before filament winding and (b) of FIG. 4 is an uncured pipe. Immediately after the formation of the main body, FIG. 4C shows the state immediately after mounting the template.

FIG. 5 is an explanatory view showing a method for manufacturing an FRP flanged tubular body according to claim 3 of the present invention, in which (a) of FIG. ) Indicates immediately after the split mold plate is attached.

FIG. 6 is a perspective view showing an example of a split mold plate used in the present invention.

[Explanation of symbols]

1 Mandrel 15 Collar Plate 2 Tubular Body with Flange 21 Pipe Body 22 Flange 210 Unhardened Pipe Body a a Curable Resin Impregnated Fiber Material a'Circuitable Resin Impregnated Fiber Material Near the Uncured Pipe Body 51 Type Plate 510 Split mold plate

[Procedure amendment]

[Submission date] April 12, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[5] are explanatory views showing a manufacturing method of the FRP flanged tubular body according to claim 3 of the present invention, immediately after the formation of (i) uncured guide body portion of FIG. 5, FIG. 5 (b ) Indicates immediately after the split mold plate is attached.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area B29L 23:00

Claims (3)

[Claims] 1. An uncured tube body is formed by winding and laminating a curable resin-impregnated fiber material from a feeder eye on a mandrel having a collar plate on one end side and connected to a rotating machine. Then, the winding position of the curable resin-impregnated fiber material at the final stage of this formation is positioned on the collar plate side, and then the template for forming the flange portion is sandwiched between the curable resin-impregnated fiber material and the collar plate. Then, it is mounted on the uncured tube main body, and the curable resin-impregnated fiber material from the feed eye is wound between these collar plate and template to form an uncured flange portion. After that, the entire resin is cured by heating, and then the template and the mandrel are released from the mold, and a method for manufacturing a tubular body with a flange made of fiber reinforced resin. 2. A uncured tube body is formed by winding and laminating a curable resin-impregnated fiber material from a feeder eye on a mandrel having a collar plate on one end side and connected to a rotating machine. Then, the winding position of the curable resin-impregnated fiber material at the final stage of this formation is positioned on the collar plate side, and then the template for forming the flange portion is sandwiched between the curable resin-impregnated fiber material and the collar plate. Then, it is mounted on the uncured tube main body, and the curable resin-impregnated fiber material from the feed eye is wound between these collar plate and template to form an uncured flange portion. After that, the template is removed, the entire resin is cured by heating, and then the mandrel is removed from the mold, and a method for producing a tubular body with a fiber-reinforced resin flange. 3. A uncured tube body is formed by winding and laminating a curable resin-impregnated fiber material from a feeder eye on a mandrel having a collar plate on one end side, and the curability at the final stage of this formation. The winding point of the resin-impregnated fiber material is located on the collar plate side, and then the split mold plate for forming the flange portion is sandwiched between the curable resin-impregnated fiber material and the collar plate, and then on the uncured pipe main body portion. Then, the curable resin-impregnated fiber material from the feed eye is wound between the collar plate and the mold plate to form an uncured flange portion, after which the split mold plate is removed. A method for producing a tubular body with a fiber reinforced resin flange, characterized in that the entire resin is cured by heating and then the mandrel is removed from the mold.