JP3132876B2 - Method and apparatus for manufacturing fiber reinforced resin pipe joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a fiber reinforced resin pipe joint.

[0002]

2. Description of the Related Art It is well known that filament winding (FW method) is conventionally used to manufacture a fiber reinforced resin pipe joint. If the tube is straight, it is relatively easy to apply the FW method.

[0003] However, when a non-linear pipe such as a T-shaped pipe joint is manufactured by the FW method, hardening is hardened especially at the branch pipe forming part and at the intersection between the branch pipe forming part and the main pipe forming part. It is not easy to uniformly wind the resin-impregnated reinforcing fibers to obtain a fiber-reinforced resin pipe joint having pressure resistance.

Therefore, for example, a so-called hand-lay-up molding method in which a curable resin-impregnated reinforcing fiber is manually laminated on a T-shaped mandrel is generally adopted. Further, as described in JP-A-1200939-200941, a T-shaped tube mandrel composed of a main pipe portion and a branch pipe portion is rotated and rotated around a rotation axis in a reference plane, There has been proposed a method of forming a laminated T-tube made of fiber reinforced resin by an operation of moving a feed eye one-dimensionally, two-dimensionally, or three-dimensionally in a plane in which the feed eye is moved.

[0005]

However, in the hand-lay-up molding method, since the laminating operation is performed manually, the molding time is prolonged, the productivity is low, and the cost is high. Also, there is a problem that the stability and reliability of the molded product are low because there is variation due to individual differences.

[0006] Japanese Patent Application Laid-Open No. 1-200939-2009
According to the method described in Japanese Patent Publication No. 1 (1993), rotation of a T-tube mandrel,
Even if the rotation is controlled by a computer and operated by a program, the molding speed cannot be increased due to the complicated operation, and the winding angle around two axes including the rotation axis is restricted. However, there is a problem that it is not easy to form a high-strength fiber reinforced resin pipe joint.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a method of manufacturing a high-strength, high-precision T-shaped fiber reinforced resin pipe joint with high productivity and at low cost. It was made for the purpose of.

[0008]

According to a first aspect of the present invention, a curable resin-impregnated reinforcing fiber is wound around a mandrel comprising a main pipe portion and a detachable branch pipe portion around the main pipe portion. After forming the fiber reinforced resin layer by curing the resin, a method for manufacturing a fiber reinforced resin pipe joint by releasing the mandrel, comprising a mold receiving member, a branch pipe core pushing member, a main pipe core pushing member, Using a fiber reinforced resin pipe joint manufacturing apparatus provided with a movable gantry, by moving the branch pipe core pushing member to a position supporting the mandrel on the axis of the mold receiving member,
The branch pipe forming section of the assembled mandrel is supported between the mold receiving member and the branch pipe core pushing member, and is rotated around the branch pipe forming section as a rotation axis to cure around the branch pipe forming section. The support of the mold receiving member and the branch pipe core pushing member is removed while the mandrel around which the resin-impregnated reinforcing fiber is wound and the curable resin-impregnated reinforcing fiber is wound therearound is received on the movable gantry. The main pipe core pressing member is moved to a position supporting the mandrel and replaced with the branch pipe core pressing member, and the main pipe part forming part of the mandrel is supported between the mold receiving member and the main pipe core pressing member, and the main pipe part forming part is formed. By rotating as a rotation axis and winding the curable resin-impregnated reinforcing fiber around the main pipe portion forming part, or moving the main pipe core pushing member to a position supporting the mandrel on the axis of the mold receiving member, the assembling state Mandrel main tube The formed part is supported between the mold receiving member and the main pipe core pushing member, and the curable resin-impregnated reinforcing fiber is wound around the main pipe part forming part and rotated around the main pipe part forming part as a rotation axis, and cured therearound. With the mandrel on which the reinforced resin-impregnated reinforcing fibers are wound on the movable frame, the support of the mold receiving member and the main tube core pushing member is removed, and the branch tube core pushing member is positioned at a position supporting the mandrel on the axis of the mold receiving member. It is moved and replaced with the main pipe core pushing member, the branch pipe part forming part of the mandrel is supported between the mold receiving member and the branch pipe core pushing member, and the branch pipe forming part is rotated by using the branch pipe forming part as a rotation axis to form the branch pipe part. This is a method of manufacturing a fiber-reinforced resin pipe joint in which curable resin-impregnated reinforcing fibers are wound around a portion, the resin is cured to form a fiber-reinforced resin layer, and then the mold is released.

The invention of claim 2 of the present application is an apparatus for manufacturing a fiber-reinforced resin pipe joint by winding a curable resin-impregnated reinforcing fiber around a mandrel having a branch pipe portion and a main pipe portion. A mold receiving member, a branch pipe core pushing member, a main pipe core pushing member, and a movable gantry, and any one of the branch pipe core pushing member and the main pipe core pushing member is provided at a position supporting the mandrel on the axis of the mold receiving member. Is selectively moved to support the mandrel between the mold receiving member and the branch pipe core pushing member or the main pipe core pushing member, and the rotation about the branch pipe part forming part or the main pipe part forming part as a rotation axis is performed. The curable resin-impregnated reinforcing fiber can be wound therearound and the movable gantry is disposed between the mold receiving member and the branch pipe core pushing member or the main pipe core pushing member, and the mold receiving member and the branch Between the tube core pushing member or the main tube core pushing member Receiving the removed mandrel, rotating along the horizontal plane, and supporting the branch pipe forming portion between the mold receiving member and the branch pipe core pushing member, and between the mold receiving member and the main pipe core pushing member. This is a device for manufacturing a fiber reinforced resin pipe joint, which is capable of switching with a support position of a main pipe forming part in the above.

In the present invention, the reinforcing fibers used are not particularly limited, but include inorganic fibers such as glass fibers and carbon fibers, and organic fibers such as aramid fibers and polyethylene terephthalate fibers (PET fibers). Rovings and cloth tapes made of these fibers (the rovings are woven in, for example, a cross-girder shape and the weaving method and width are not particularly limited) are preferably used.

The curable resin-impregnated reinforced fiber is obtained by impregnating the above-mentioned reinforced fiber with a curable resin.
It is preferable that 50 to 200 parts by weight of the curable resin is impregnated with respect to part by weight.

As the curable resin, conventionally known thermosetting resins and photocurable resins are used, and unsaturated polyester resins and epoxy resins which are thermosetting resins are preferably used.

If necessary, a filler such as Aerosil, glass balloon, calcium carbonate, talc or the like may be added to the curable resin.
The amount is preferably 0.5 to 50 parts by weight based on parts by weight.

The curable resin is generally added with a curing agent and a curing accelerator, and conventionally known ones may be used. Examples of the thermosetting agent include methyl ethyl ketone peroxide and benzoyl permixide. Examples of the curing accelerator include, for example, cobalt naphthenate, manganese naphthenate, dimethylaniline and the like.

[0015]

According to a first aspect of the present invention, there is provided a method of manufacturing a fiber reinforced resin pipe joint, comprising: a mold receiving member, a branch pipe core pushing member, a main pipe core pushing member, and a movable base. Moving the branch pipe core pushing member to a position supporting the mandrel on the axis of the mold receiving member by using the manufacturing apparatus of (1), and moving the branch pipe forming part of the assembled mandrel to the mold receiving member and the branch pipe core pushing member And the curable resin-impregnated reinforcing fiber was wound around the branch pipe part forming part, and the curable resin-impregnated reinforcing fiber was wound around the branch pipe part forming part. With the mandrel received on the movable base, the support of the die receiving member and the branch core pressing member is released, and the main pipe core pressing member is moved to a position supporting the mandrel on the axis of the die receiving member, and the branch pipe core pressing member is moved. Replace the mandrel with the main tube forming part Placing supported between the member and the main core press member, a main portion forming portion is rotated as a rotation axis winding the curable resin impregnated reinforcing fibers around the main pipe portion forming portion,
Or, conversely, by rotating the main pipe part forming part as a rotation axis and winding the curable resin-impregnated reinforcing fiber around the main pipe part forming part, and then rotating the branch pipe forming part as a rotation axis, the branch pipe part forming part Wrap curable resin impregnated reinforcing fiber around
By curing these resins to form a fiber-reinforced resin layer and then releasing the mold, the winding angle of the curable resin-impregnated reinforcing fibers around the branch pipe section and the main pipe section is not restricted. Thus, a fiber reinforced resin pipe joint with a high strength and high accuracy branch pipe can be manufactured. Further, when winding the curable resin-impregnated reinforcing fiber, it is not necessary to rotate the mandrel intricately, so that a fiber-reinforced resin pipe joint with a branch pipe can be manufactured with high productivity and at low cost.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing a fiber reinforced resin pipe joint, comprising a mold receiving member, a branch pipe core pushing member, a main pipe core pushing member, and a movable gantry. Either the branch pipe core pushing member or the main pipe core pushing member is selectively moved to the position supporting the mandrel, and the mandrel is moved between the mold receiving member and the branch pipe core pushing member or the main pipe core pushing member. It is possible to support and switch the rotation about the branch pipe part forming part or the main pipe part forming part as a rotation axis, and to wind the curable resin-impregnated reinforcing fiber around it, and the movable gantry comprises a mold receiving member and a branch pipe. A mold receiving member disposed between the core pressing member or the main pipe core pressing member, receiving the mandrel removed from between the mold receiving member and the branch pipe core pressing member or the main pipe core pressing member, rotating along a horizontal plane, and Branch between the pipe and the core pushing member Since the switching position between the supporting position of the forming part and the supporting position of the main pipe forming part between the mold receiving member and the main pipe core pushing member is enabled, the rotation about the branch pipe forming part as the rotation axis is enabled. And, the setting change between the rotation with the main pipe portion forming portion as the rotation axis can be performed promptly and reliably, and a fiber reinforced resin pipe joint with a branch pipe with good productivity,
In addition, it can be used as an inexpensive manufacturing device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings using an embodiment using a T-shaped mandrel.

FIG. 1 is an explanatory view showing the operation of the feed eye used in the present invention. The feed eye 2 is three-dimensionally moved in the X-axis direction along the axis of the T-shaped mandrel 1, moved in the Z-axis direction approaching and moving away from the T-shaped mandrel 1, and moved in the Y-axis direction in the vertical direction. The movement operation, the rotation operation indicated by V that rotates on a horizontal plane including the rotation axis of the T-shaped mandrel 1, and the rotation operation indicated by U that rotates with the feeding direction of the curable resin-impregnated reinforcing fiber as the rotation axis. It is possible.

FIG. 2 is a front view showing a T-shaped mandrel 1 used in the present invention. The T-shaped mandrel 1 includes a main pipe forming section 11 and a branch pipe forming section 12. The main pipe section forming section 11 is a molded article formed by blow molding using polyethylene or the like, is a linear hollow body, and has pipe connection section forming sections 111 at both ends. On the outer peripheral surface, a plurality of ridges are formed along the circumferential direction for forming a groove for mounting the packing on the inner peripheral surface of the pipe connection portion. The tip is a sealed head 112.
At the center of the main pipe part forming part 11, a branch pipe part forming part connecting part 11 that protrudes slightly in the lateral direction perpendicular to the axial direction thereof is provided.
3 are provided.

The main tube forming portion 11 is not limited to the above-mentioned structure. For example, the main tube forming portion 11 may be divided into two parts at a substantially central portion, and may be bonded to each other with a hot-melt adhesive or may be formed in the axial direction. It is good also as a structure which relatively moves and fits.

Around the central portion of the main tube forming portion 11,
In order to improve the strength, the resin impregnated reinforced short fibers may be applied by hand-up molding and then naturally cured at room temperature.

The branch pipe forming section 12 is a molded article formed by blow molding using polyethylene or the like, is a linear hollow body, and has a pipe connecting section forming section 121 at a tip end. On the outer peripheral surface, a plurality of ridges are formed along the circumferential direction for forming a groove for mounting the packing on the inner peripheral surface of the pipe connection portion. The tip is a closed head 122. An opening 123 is provided at the end of the base end. Then, the connecting part 1 of the main pipe part forming part 11
13 so that the opening 123 is fitted to the main pipe forming part, and the T-shaped mandrel 1 is attached to the main pipe forming part.
Is formed. At this time, it is preferable that the outer peripheral surface of the connection portion 113 and the inner peripheral surface of the opening portion 123 be appropriately bonded with a hot melt adhesive or the like, so that the both are firmly fixed.

The main pipe forming section 11 of the branch pipe forming section 12
The manner of attachment to the branch is not limited to the above case, and a structure may be adopted in which the two are fitted to each other as appropriate so that the branch pipe forming part 12 can be removed in the axial direction when the mold is removed.

FIG. 3 is a front view showing an apparatus 3 for manufacturing a fiber reinforced resin pipe joint used in the present invention. The fiber reinforced resin pipe joint manufacturing apparatus 3 includes a mold receiving member 34, a main pipe core pushing member 32, a branch pipe core pushing member 33, and a movable gantry 36.

The mold receiving member 34 comprises a drive side chuck 31 and a shaft 341. The drive side chuck 31 is connected to a motor in a motor box 37 by a shaft 34 and is rotatable (vacuum suction is not shown). . The drive-side chuck 31 is provided with a concave portion 311 corresponding to the outer shape of the head portion 112 at one end of the main pipe portion forming portion 11 and the head portion 122 of the branch pipe portion forming portion 12. Holes are provided, and vacuum suction can be performed through the fine holes. A plurality of pins 31 are provided on the outer periphery of the driving chuck 31.
2 are provided in a line at predetermined intervals along the circumferential direction. The pin 312 is used to improve the accuracy of the winding angle without causing the fiber to slip when the curable resin-impregnated reinforcing fiber is wound in a helical shape.

A support-side chuck 321 is provided at the end of the main tube core pushing member 32 so as to be rotatable in the circumferential direction. The support-side chuck 321 is provided with a concave portion corresponding to the outer surface shape of the head portion 112 at the other end of the main tube forming portion 11, and a fine hole is provided on the inner surface of the concave portion so that vacuum suction can be performed through the fine hole. Have been. A plurality of pins 322 are provided in a row on the outer periphery of the support-side chuck 321 at predetermined intervals along the circumferential direction. The support side chuck 321 is
It is connected to the cylinder 323 and can be made to approach or separate from the drive side chuck 31 by expanding and contracting the cylinder 323.

A branch pipe pushing portion 331 having a pointed top is provided at the tip of the branch pipe core pushing member 33 so as to be rotatable in the circumferential direction. The branch pipe pushing part 331 is the cylinder 3
32, and can be moved closer to or away from the drive chuck 31 by expanding and contracting the cylinder 332.

Main pipe core pushing member 32 and branch pipe core pushing member 33
As shown in FIG. 4, they are attached to the distal ends of the L-shaped rotating plates 351 respectively. The L-shaped rotating plate 351 has its central portion mounted on the first fixed base 35 by means of a bearing 352. One end of an arm 353 is fixed to the L-shaped rotating plate 351, and the other end of the arm 353 is rotatably mounted on the tip of the arm of the first cylinder 354 fixed to the fixed base 35. Is being worn. Then, when the first cylinder 354 is contracted, as shown in FIG. 3, the main pipe core pushing member 32 is moved to a position on the axis of the driving side chuck 31, and when the first cylinder 354 is extended, although not shown, L The U-shaped rotating plate 351 is rotated so that the branch pipe core pushing member 33 is replaced with the main pipe core pushing member 32 and is moved to a position on the axis of the drive side chuck 31.

As shown in FIG. 3, the fixed base 35 has a second
Of the arm of the second cylinder 355 is fixed to the connecting plate 361 of the movable base 36.
It is connected to.

The movable gantry 36 is provided between the motor box 37 and the fixed gantry 35.
The movable base 36 includes a rotary table 362 and a rotary motor 3.
64 and a bearing member 365.
Is connected to a rotation motor 364 via a shaft 363, and is rotatable in a circumferential direction on a horizontal plane. On the turntable 362, a bearing member 365 is provided. The bearing member 365 is composed of a main pipe cylinder 365b having a main pipe receiving portion 365a at the tip and a branch pipe cylinder 365d having a branch pipe receiving portion 365c at the tip.

The drive-side chuck 31 and the support-side chuck 3
When the T-shaped mandrel 1 is supported between the pipe 21 and the branch pipe pushing portion 331 and the curable resin-impregnated reinforcing fiber is wound therearound, the main pipe cylinder 36 of the bearing member 365 is used.
5b and the branch pipe cylinder 365d are in a contracted state, so that there is no problem in rotation about the axis of the drive side chuck 31 of the T-shaped mandrel 1 as a rotation axis and winding of the hardening resin impregnated reinforcing fiber around the rotation. To be.

Then, the branch pipe forming section 12 of the T-shaped mandrel 1 is rotated around the rotation axis, and the hardening resin impregnated reinforcing fiber is wound therearound, and then the main pipe section forming section 11 is rotated around the rotation axis. When the setting is changed so that the curable resin-impregnated reinforcing fibers are wound therearound, the main pipe cylinder 365b and the branch pipe cylinder 365d of the bearing member 365 are extended to receive the T-shaped mandrel 1 and change the set. Play a role to do.

Referring now to FIG. 5, a T-shaped mandrel 1
The following describes an example in which the curable resin-impregnated reinforcing fiber is wound around the branch pipe forming section 12 and then set to be rotated around the main pipe forming section 11 as an example.

First, as shown in FIG. 5 (a), the head of the branch tube forming portion 12 is wound with the curable resin-impregnated reinforcing fiber wound around the branch tube forming portion 12 of the T-shaped mandrel 1. The portion 122 is fixed to the drive-side chuck 31 and a branch tube pushing portion 331 of the branch tube core pushing member 33 is provided at a portion opposite to a portion where the branch tube forming portion 12 at the center of the main tube forming portion 11 is connected.
Are in contact with each other.

From this state, as shown in FIG. 5B (see FIG. 3), the main pipe cylinder 365 of the bearing member 365 is formed.
b and the branch pipe cylinder 365d are extended to receive the main pipe forming part 11 of the T-shaped mandrel 1 at the main pipe receiving part 365a, and the branch pipe forming part 12 around which the hardening resin impregnated reinforcing fiber is wound. Is received by the branch pipe receiving portion 365c, and the vacuum suction of the drive-side chuck 31 is released. In addition, the cylinder 332 is contracted, and the branch pipe core pushing portion 331 is retracted from the driving side mandrel 31.

Then, as shown in FIG. 5C (see FIG. 3), by contracting the second cylinder 355, T
The mandrel 1 is pulled out of the drive chuck 31 together with the movable base 36 while being received by the bearing member 365.

Next, as shown in FIG. 5D (see FIG. 3), the turntable 362 is rotated by a quarter turn, and
One end of the main tube forming portion 11 of the character-shaped mandrel 1 is directed toward the drive chuck 31.

Next, as shown in FIG. 5E (see FIG. 3), the second cylinder 355 is extended, and the movable base 36 is moved in the direction of the drive-side chuck 31, so that one end of the main pipe forming part 11 is moved. Is brought close to the drive chuck 31, and the head is fixed by vacuum suction.

At the same time, the first cylinder 33 shown in FIG.
2 to extend the main pipe core pushing member 32 to the drive chuck 3
1 axis. Finally, the main pipe of the T-shaped mandrel 1 is extended by pressing the support-side chuck 321 against the head of the other end of the main pipe forming section 11 of the T-shaped mandrel 1 by vacuuming and fixing it. In a state where the rotation with the portion forming portion 11 as a rotation axis is possible,
A series of set change ends. Next, one embodiment of a method of manufacturing a fiber reinforced resin pipe joint of the present invention will be described with reference to FIGS.

In the first step, as shown in FIG. 6, the T-shaped mandrel 1 is rotated around the branch tube forming portion 12 as a rotation axis, and the thermosetting resin-impregnated reinforced fiber is wound around the branch tube forming portion 12. Wrap.

First, as shown in FIG. 6A, the head 122 of the branch pipe forming section 12 is fixed to the drive side chuck 31 of the apparatus 3 by vacuum suction. If necessary, appropriate fixing means such as bolting may be employed. A pressing portion 33 of a branch pipe core pushing member 33 is provided on a portion of the T-shaped mandrel 1 opposite to the portion where the branch pipe forming portion 12 is mounted.
Press 1. If necessary, a thermosetting resin-impregnated glass mat and a cloth for forming a reinforcing layer are wound around a substantially central portion and semi-cured.

Next, as shown in FIG. 6B, a non-woven fabric impregnated with a thermosetting resin for forming a weeping prevention layer is wound around the branch pipe portion 12 as shown in FIG. Next, as shown in FIG. 6C, the drive-side chuck 31 is rotated, the branch pipe forming section 12 is rotated about the rotation axis, and the thermosetting resin is applied to a plurality of glass rovings using the feed eye 2. The impregnated reinforcing fiber 4 is wound around the base end from the pipe connection part forming part 121 of the branch pipe part forming part 12. At this time, winding is performed first by hoop winding, then by helical winding, and then again by hoop winding. When winding by helical winding, as shown in FIG.
Helical winding is performed between the intersections between the pins 312 of the drive-side chuck 31 and the main tube forming part 11. At this time, the helical winding may be simply performed so as to reciprocate between the pin 312 of the drive-side chuck 31 and the base end of the main tube forming unit 11, but the branch tube forming unit 12 of the main tube forming unit 11 is attached. When the curable resin-impregnated reinforcing fiber 4 is wound around the intersection with the main tube forming portion 11, the intersection between the main tube and the branch tube of the molded product is wound. Is preferably strengthened. Feed Eye 2
Performs two axes of operation, that is, a movement operation in the X-axis direction along the axis of the branch tube forming portion 12 and a rotation operation indicated by V. In addition to the above operations, a five-axis operation including a Z-axis moving operation approaching and separating from the branch pipe forming portion 12, a Y-axis moving operation in a vertical direction, and a turning operation indicated by U is performed. You may.

Finally, the rotation of the drive-side chuck 31 is stopped, and the fiber is cut at the pin 312 of the drive-side chuck 31. As a second step, the setting is changed as described above with reference to FIG.

As a third step, as shown in FIG. 7, the T-shaped mandrel 1 is rotated about the main pipe forming section 11 as a rotation axis, and the intersection between the main pipe forming section 11 and the branch pipe forming section 12 is formed. Around the thermosetting resin-impregnated reinforcing fiber 4.

First, as shown in FIG. 7 (a), the head 112 at one end of the main tube forming portion 11 of the T-shaped mandrel 1 is fixed to the drive chuck 31 by vacuum suction, and the head 112 at the other end is fixed. Is fixed to the support chuck 321 by vacuum suction. If necessary, a thermosetting resin-impregnated nonwoven fabric for preventing weeping is wound around a substantially central portion of the main pipe portion forming portion 11.

Next, as shown in FIG. 7 (b), the drive-side chuck 31 is rotated to rotate the main-pipe forming section 11 as a rotation axis, and is thermally cured into a plurality of glass rovings using the feed eye 2. The reinforcing resin-impregnated reinforcing fiber 4 is wound around the main pipe portion forming portion 11.

At this time, first, as shown in FIG. 7 (b), it is wound in a hoop shape, then, as shown in FIG. 7 (c), it is wound in a helical shape and, if necessary, again in a hoop shape. Wrap. As shown in FIG. 7 (c), the helical winding is performed between the pin 312 of the driving side chuck 31 and the pin 322 of the supporting side chuck 321. At the same time, the pins 312 of the drive-side chuck 31
The main pipe forming part 11 and the branch are formed in such a manner as to be turned between the base end of the branch pipe forming part 12 and between the base end of the branch pipe forming part 12 and the pin 322 of the support side chuck 321. It is particularly carefully wound around the intersection with the tube forming part 12.

The feed eye 2 is operated in two directions, that is, a movement action in the X-axis direction along the axis of the main pipe forming portion 11 and a rotation action indicated by V. Note that the branch pipe forming section 1
When the curable resin-impregnated reinforcing fiber is wound around the intersection with the base end of No. 2, in addition to the above-described operation, the Z-axis direction moving operation that approaches and separates from the main pipe forming portion 11, and the vertical Y-axis direction A 5-axis operation in which a moving operation and a rotation operation indicated by U are added may be performed.

Finally, as shown in FIG. 7D, the rotation of the drive-side chuck 31 is stopped, and the fiber is cut at the pin 312 of the drive-side chuck 31 and the pin 322 of the support-side chuck 321. Then, the drive-side chuck 31 of the device 3
And release the support side chuck 321 by releasing the vacuum suction,
The T-shaped mandrel 1 around which the curable resin-impregnated reinforcing fiber 4 is wound is taken out.

In the fourth step, as shown in FIG. 8, the curable resin-impregnated reinforcing fiber 4 wound around the T-shaped mandrel 1 is heated and cured by the heater 5 to form a fiber-reinforced resin layer.

As a fifth step, first, as shown in FIG.
The T-shaped mandrel 1 is demolded by crushing the branch tube forming portion 12. At this time, even if hot-melt bonding is used for bonding between the branch pipe forming part 12 and the main pipe forming part 11 with the connecting part 113, since it is melted by heating at the time of drying, there is no problem in demolding. . Next, the main pipe portion forming part 11 is released from the mold by crushing it to obtain a T-shaped fiber reinforced pipe joint.

When the resin-impregnated reinforcing fibers are wound, it is preferable to control the operation of the feed eye 2 and the rotation operation of the bending mandrel 1 by computer, since high precision and efficiency can be achieved.

There is no problem with the control accuracy when controlling with a computer, but an accuracy of 0.1 mm or more is sufficient. In addition, it is preferable to use an AC servomotor for the motor of each axis.

In order to wind the thermosetting resin-impregnated reinforcing fiber around the branch pipe section after the thermosetting resin-impregnated reinforcing fiber is wound around the main pipe section, the first step and the third step in the above steps are performed. You can do the opposite.

Example 1 Using a feed eye 2 shown in FIG. 1, a T-shaped mandrel 1 shown in FIG. 2, and a fiber reinforced resin pipe joint manufacturing apparatus 3 shown in FIGS. According to the process shown in No. 9, a T-shaped pipe joint (main pipe diameter: 150 mm, branch pipe diameter: 75 mm) having an average wall thickness of 10 mm was manufactured under the following conditions.

As the resin composition in the thermosetting resin-impregnated reinforcing fiber, the thermosetting resin-impregnated nonwoven fabric, the thermosetting resin-impregnated glass mat and the cloth, an unsaturated polyester resin (trade name: ESTER, manufactured by Mitsui Toatsu Co., Ltd.) R235) A mixture of 100 parts by weight, methyl ethyl ketone peroxide 0.33 part by weight, and cobalt naphthenate 0.003 part by weight was used.

A 3 mm-thick polyester felt-like nonwoven fabric (200 g / m ² , manufactured by Japan Vilene Co., Ltd.) is immersed in the above resin composition, pulled out, and naturally dried for 60 minutes to impregnate the resin composition with 80% by weight. The obtained thermosetting resin-impregnated nonwoven fabric was obtained.

A chopped strand mat of 150 mm length and 300 mm width (manufactured by Asahi Fiber Glass Co., Ltd., count 45)
0 g / m ² ) and a roving cloth of 80 mm length and 150 mm width (manufactured by Asahi Fiber Glass Co., Ltd., count 330 g / m ² )
² ) was immersed in the above resin composition, pulled out, and then naturally dried for 60 minutes to obtain a thermosetting resin-impregnated glass mat and a thermosetting resin-impregnated glass cloth impregnated with 60% by weight of the resin composition. Obtained.

First, as shown in FIG. 6A, two thermosetting resin-impregnated glass mats are wound around the center of the main tube forming portion 11, and 16 thermosetting resin-impregnated glass mats are placed thereon. Wound a cross.

Next, as shown in FIG. 6B, a non-woven fabric impregnated with a thermosetting resin was wound around the branch pipe forming portion 12. Next, as shown in FIG. 6C, a thermosetting resin-impregnated reinforcing fiber obtained by impregnating the above resin composition into ten glass rovings (count: 2230 g / km) was wound around the branch pipe part forming part 12.

Next, as shown in FIG. 7A, two sheets of non-woven fabric impregnated with a thermosetting resin are wound around the main pipe portion forming portion 11, and then as shown in FIGS. 7B to 7D and FIG. After winding the thermosetting resin impregnated reinforcing fiber around the
The thermosetting resin was cured by heating at 0 ° C. for 2 hours.

Incidentally, the thermosetting resin-impregnated reinforcing fibers are about 55
The fiber was impregnated with a resin by weight, and when the fiber was wound, the feed eye 2 was operated in two axes of X and V.

After curing, the mold was removed to obtain a fiber reinforced resin pipe joint. As a result, from the start of mounting the branch pipe portion forming portion 12 between the driving side chuck 31 and the branch tube core pushing member 33, the main pipe portion forming portion 11 is moved from the driving side chuck 31 to the main tube core pushing member 3.
The molding time (excluding the time of natural standing; the same applies hereinafter) until the removal from 2 was 25 minutes. The setting change time of the mandrel shown in FIG. 5 was 40 seconds.

A pipe was connected to the obtained T-shaped fiber reinforced resin pipe joint, and a hydrostatic pressure rupture test was performed. As a result, the pressure resistance without causing water leakage and destruction is 4
It was ² kg / cm ² .

Incidentally, the hydrostatic pressure rupture test was carried out in FIG. 10 and FIG.
As shown in the figure, the short pipe 7 is connected to each pipe connecting portion 61 of the T-shaped fiber reinforced resin pipe joint 6 obtained by the present invention, and the end of the short pipe 7 is covered with the flange 8. And its flange 8
The compressive strength was evaluated by applying a hydrostatic pressure from a part of the sample.

Embodiment 2 In the same manner as in Embodiment 1, except that the feed eye is operated for five axes of X, V, Y, Z and U instead of operating for two axes of X and V. Then, a T-shaped fiber reinforced resin pipe joint similar to that of Example 1 was manufactured.

As a result, the molding time was 18.5 minutes. The set change time shown in FIG. 5 was 40 seconds. Further, a pipe was connected to a T-shaped pipe joint made of fiber reinforced resin, and a hydrostatic pressure fracture test was performed. As a result, the pressure resistance is
It was 42 kg / cm ² .

Comparative Example The winding of the reinforcing fiber around the mandrel was performed without using a feed eye, the thermosetting resin was formed by a hand-lay-up molding method, and the setting was performed manually without changing the setting using a mandrel rotating device. A T-shaped fiber reinforced resin pipe joint having an average thickness of 15 mm was manufactured in the same manner as in Example 1 except that the replacement was performed.

As a result, the molding time required 45 minutes.
In addition, it took three minutes to change the setting manually. Also, T
A pipe was piped to a U-shaped fiber reinforced resin pipe joint, and a hydrostatic pressure fracture test was performed. As a result, the pressure resistance is 42 kg / c.
m ² .

In the case of the same average thickness of 10 mm as in the first embodiment, there is a large variation in the product, and it is always 40 kg / m.
always can not be satisfied cm ² or more of the compressive strength,
In order to always obtain a product having a pressure resistance of 40 kg / cm ² or more as in the example, the average thickness had to be 15 mm.

As is clear from the description of Examples 1, 2 and Comparative Examples, in the case of Examples, the molding time was short and the internal pressure strength was high. On the other hand, in the case of the comparative example, the molding time was long, and in order to stably obtain a product having the same strength as that of the same example, it was necessary to increase the thickness thereof, resulting in an increase in cost.

[0072]

The method of manufacturing a fiber reinforced resin pipe joint according to the first aspect of the present invention is configured as described above, so that a fiber reinforced resin pipe joint with a high-strength and high-precision branch pipe is used. It can be manufactured with good productivity and at low cost.

The apparatus for manufacturing a fiber reinforced resin pipe joint according to the invention of claim 2 of the present application is configured as described above.
A fiber tube made of fiber reinforced resin with a branch pipe can quickly and reliably change the setting between the rotation about the branch pipe part forming part as the rotation axis and the rotation about the main pipe part formation part as the rotation axis. It can be used as an apparatus for producing a joint with good productivity and at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an operation of a feed eye used in the present invention.

FIG. 2 is a front view showing an example of a T-shaped mandrel used in the present invention.

FIG. 3 is a front view showing an example of an apparatus for manufacturing a fiber reinforced resin pipe joint used in the present invention.

FIG. 4 is a right side view of the apparatus shown in FIG.

FIG. 5 shows a state in which the setting of the T-shaped mandrel is changed from rotation about the branch pipe forming part to rotation using the apparatus shown in FIG. 3 to rotation about the main pipe forming part. It is a front view explaining.

FIG. 6 is a front view for explaining a state in which the branch pipe portion forming portion of the T-shaped mandrel is rotated about a rotation axis and a thermosetting resin-impregnated reinforcing fiber is wound therearound in one embodiment of the present invention. .

FIG. 7 is a front view illustrating a state in which the main pipe portion forming portion of the T-shaped mandrel is rotated around a rotation axis and a thermosetting resin-impregnated reinforcing fiber is wound therearound in one embodiment of the present invention.

FIG. 8 shows an example of a heater according to an embodiment of the present invention.
It is a front view showing the state where a resin is hardened and a fiber reinforced resin layer is formed.

FIG. 9 is a front view showing a state in which the T-shaped mandrel is removed from the mold in one embodiment of the present invention.

FIG. 10 is a front view illustrating a state in which a hydrostatic pressure test is performed on the T-shaped fiber-reinforced resin pipe joint obtained according to the present invention.

FIG. 11 is a longitudinal sectional view showing a connection portion in a hydrostatic pressure test of a T-shaped fiber-reinforced resin pipe joint obtained according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 T-shaped mandrel 2 Feed eye 3 Manufacturing apparatus of pipe joint made of fiber reinforced resin 4 Thermosetting resin impregnated reinforced fiber 5 Heater 11 Main pipe part forming part 12 Branch pipe part forming part 31 Drive side chuck 32 Main pipe core pushing member 33 Branch Tube core pushing member 34 Mold receiving member 35 Fixed gantry 36 Movable gantry 321 Support side chuck 331 Branch pipe pushing part

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ identification code FI B29L 31:24 (58) Investigated field (Int.Cl. ⁷ , DB name) B29C 70/16 B29C 70/06 F16L 41/02 F16L 47/00

Claims (2)

(57) [Claims] 1. A fiber reinforced resin layer is formed by winding a curable resin-impregnated reinforcing fiber around a mandrel composed of a main pipe part forming part and a detachable branch pipe part forming part around the main pipe part forming part, and curing the resin. A method of manufacturing a fiber reinforced resin pipe joint by removing the mandrel, and comprising a mold receiving member, a branch pipe core pushing member, a main pipe core pushing member, and a movable gantry. Moving the branch pipe core pushing member to a position supporting the mandrel on the axis of the mold receiving member by using the manufacturing apparatus of (1), and moving the branch pipe forming part of the assembled mandrel to the mold receiving member and the branch pipe core pushing member And the curable resin-impregnated reinforcing fiber was wound around the branch pipe part forming part, and the curable resin-impregnated reinforcing fiber was wound around the branch pipe part forming part. With the mandrel on the movable platform The support of the core member and the branch core pressing member is removed, the main tube core pressing member is moved to a position supporting the mandrel on the axis of the mold receiving member, and replaced with the branch core pressing member, and the main pipe forming portion of the mandrel is formed. It is supported between the mold receiving member and the main tube core pushing member, and the curable resin impregnated reinforcing fiber is wound around the main tube portion forming portion by rotating the main tube portion forming portion as a rotation axis, or the shaft of the mold receiving member. The main pipe core pushing member is moved to a position supporting the mandrel on the line, the main pipe part forming part of the assembled mandrel is supported between the mold receiving member and the main pipe core pushing member, and the main pipe part forming part is rotated. The mold receiving member and the main tube core pressing member are rotated in a state where the curable resin impregnated reinforcing fiber is wound around the main pipe portion forming portion, and the mandrel around which the curable resin impregnated reinforcing fiber is wound is received by the movable base. Support Then, the branch pipe core pushing member is moved to a position supporting the mandrel on the axis of the mold receiving member and replaced with the main pipe core pushing member, and the branch pipe portion forming portion of the mandrel is replaced with the mold receiving member and the branch tube core pushing member. The curable resin-impregnated reinforcing fibers are wound around the branch pipe forming section around the branch pipe forming section, and the resin is cured to form a fiber reinforced resin layer. A method of manufacturing a fiber reinforced resin pipe joint, characterized by being molded. 2. An apparatus for manufacturing a fiber reinforced resin pipe joint by winding a curable resin-impregnated reinforced fiber around a mandrel having a branch pipe part forming part and a main pipe part forming part, comprising a mold receiving member and a branch. A core pressing member, a main core pressing member, and a movable gantry are provided, and either the branch core pressing member or the main core pressing member is selectively moved to a position supporting the mandrel on the axis of the mold receiving member. Then, the mandrel is supported between the mold receiving member and the branch pipe core pushing member or the main pipe core pushing member, and the rotation with the branch pipe part forming part or the main pipe part forming part as a rotation axis is switched to cure around the mandrel. The resin impregnated reinforcing fiber can be wound thereon, and the movable base is disposed between the mold receiving member and the branch pipe core pushing member or the main pipe core pushing member, and the mold receiving member and the branch pipe core pushing member or the main pipe core are arranged. Mandrel removed from between push member The main pipe portion is pivoted along a horizontal plane by receiving the main tube portion between the mold receiving member and the main tube core pushing member, and the supporting position of the branch pipe portion forming portion between the mold receiving member and the branch tube core pushing member. An apparatus for manufacturing a fiber reinforced resin pipe joint, characterized in that it is possible to switch between a supporting position of a molded portion and a supporting position.