JP3181360B2 - Method for producing fiber-reinforced resin laminate - 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 for producing a fiber reinforced resin laminate excellent in dimensional accuracy of inner diameter of an end portion and smoothness of an inner peripheral surface.

[0002]

2. Description of the Related Art Conventionally, in producing a fiber-reinforced resin molded product, filament winding (FW method) in which a fiber-impregnated reinforcing fiber is wound around a core mold to form a fiber-reinforced resin layer.
It is well known that is used. However, the fiber reinforced resin molded article manufactured by the FW method has poor inner diameter dimensional accuracy and inner peripheral surface smoothness. In the case of manufacturing, it is necessary to perform elaborate post-processing after molding, and there is a problem that the manufacturing process is complicated, productivity is low, and cost is high.

[0003] When manufactured by the FW method, for example, a pipe joint or a pipe having a pipe connection receiving port to which a packing or a stopper is attached at an end thereof, the whole core mold is pulled out in one direction. If it is difficult to do so,
As described in JP-A-5, the molding material is wound on an annular groove forming die in which a core member divided concentrically is mounted on a surface layer made of an elastic body at a predetermined position of a core die body. After the molding material layer is molded and cured, the core body is removed first, then the core member is removed from the surface layer by inserting a pointed tool into a notch or a small hole, and finally the surface layer is removed. A method of removing the material by peeling it,
As described in Japanese Patent Publication No. 25, a method is proposed in which two half resin molded products are fixed to each other to form a core member of a molded tube product, and a glass fiber impregnated with resin is wound on the core member. Have been.

[0004]

However, in the former case, in order to remove the core member, it is necessary to perform a troublesome work of inserting a pointed tool into the notch or the small hole and removing the core member. Also, since the fiber reinforced resin layer is exposed on the inner peripheral surface at the end, the dimensional accuracy of the inner diameter and the smoothness of the inner peripheral surface are still not sufficient, and post-processing is required, so that productivity is increased. However, there is a problem that the cost is high and the cost is high.

In the latter case, since the two half-split resin molded products are fixed to each other, a small step is formed in the circumferential direction or a gap is formed, so that the desired inner peripheral surface of the desired molded product is formed. There is a problem that it is difficult to form the shape, and it is difficult to obtain a molded article made of fiber reinforced resin having excellent inner diameter dimensional accuracy of the end portion and smoothness of the inner peripheral surface.

The present invention solves the above-mentioned conventional problems and provides a method for producing a fiber-reinforced resin laminate excellent in dimensional accuracy of the inner diameter of the end portion and surface smoothness with good productivity and at low cost. It is done for the purpose of.

[0007]

According to the present invention , there is provided a short tubular auxiliary member having an inner peripheral surface which is bent in an uneven shape in the axial direction and provided with a pin projecting outward from an outer peripheral surface at one end. On the end of the cylindrical or cylindrical core mold, the mold is formed by mounting the pin so that the end provided with the pin is directed toward the edge of the cylindrical or cylindrical core mold, and the mold is formed. A curable resin-impregnated reinforcing fiber is wound around a pin to form a fiber-reinforced resin layer by hooking the pin, the resin is cured, and an auxiliary member is integrally joined to an end of the cured fiber-reinforced resin layer, Thereafter, a cylindrical or columnar core die is removed, and a portion of the auxiliary member provided with the pins is cut and removed to produce a fiber-reinforced resin laminate.

The phrase “having an inner peripheral surface that is bent in an uneven shape in the axial direction” means, for example, that an inner peripheral surface of an end portion of a product has a different-diameter portion in the axial direction such that a packing or a retaining member is attached. Means having an uneven surface in the axial direction corresponding to the inner peripheral surface shape.

[0009] The cylindrical or columnar core type is not limited to the case where the cross section perpendicular to the substantial axis of symmetry is a perfect circle, as well as an ellipse,
An ellipse or a so-called square pipe, in which small Rs are provided at four corners of a square, are included.

[0010] As the material of the auxiliary member, for example, iron, stainless steel, metals such as aluminum, polyvinyl chloride, polyethylene, polypropylene, polycarbonate, thermoplastic resins such as acrylonitrile ─ butadiene ─ styrene copolymer, an unsaturated polyester resin Thermosetting resins such as epoxy resin, phenol resin and the like are used. Fillers such as calcium carbonate and calcium hydroxide, and reinforcing fibers such as glass fibers and carbon fibers may be added to the resin. In particular, polyvinyl chloride is frequently used because it is strong and inexpensive.

When the material is metal, a cutting method, a casting method, or the like is used as a method of manufacturing the auxiliary member. When the material is a thermoplastic resin, an injection molding method, a vacuum molding method, or the like is used. When the material is a thermosetting resin, a resin injection method or the like is used. When the material is a resin in which reinforcing fibers are added, a SMC press method, a BM
A C press method, a press forming method of a stampable sheet, and the like are used.

[0012] As the laminate of the present invention, for example,
Fittings, pipes, propeller shafts, and the like are included.

[0013]

According to the present invention , a short tube-shaped auxiliary member having an inner peripheral surface bent in an uneven shape in the axial direction and provided with a pin protruding outwardly from the outer peripheral surface at one end is provided with a cylindrical or cylindrical core. On the end of the mold, a mold is formed by mounting the pin so that the end provided with the pin faces the edge of the cylindrical or cylindrical core mold, and a curable resin is formed around the mold. The impregnated reinforcing fiber is wound around a pin to form a fiber reinforced resin layer, and the resin is cured.The auxiliary member is integrally joined to the end of the cured fiber reinforced resin layer. By removing the core mold and cutting and removing the part where the pin of the auxiliary member is provided, the curable resin-impregnated reinforcing fiber can be uniformly wound around the mold, and has excellent strength and pressure resistance Can form a fiber-reinforced resin layer Without requiring tedious demolding operations, it can be formed in excellent condition having an inner diameter dimensional accuracy and surface smoothness and resistance to weeping resistance, also possible to simplify the demolding process. Thereby, a highly reliable fiber-reinforced resin laminate having excellent strength and pressure resistance can be manufactured with good productivity and at low cost.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings by way of embodiments. FIG. 1 is an explanatory diagram showing the operation of the feed eye used in the present invention. The feed eye 2 moves in the X-axis direction along the axis of the mold 1, moves in the Z-axis direction approaching and moving away from the mold 1, and moves in the vertical direction.
The three-dimensional movement operation of the axial movement operation, the rotation operation indicated by V that rotates on a horizontal plane including the rotation axis of the molding die 1, and the rotation is performed with the feeding direction of the hardening resin impregnated reinforcing fiber as the rotation axis. The rotation operation indicated by U is enabled.

FIG . 2 is a sectional view showing an example of a molding die used for molding a socket type fiber reinforced resin laminated pipe joint according to an embodiment of the present invention. The mold 1 includes a cylindrical or cylindrical core mold 11 and an auxiliary member 12 mounted thereon.
Consists of The cylindrical or cylindrical core mold 11 includes a cylindrical or cylindrical core body 111 and a pin base 112. In FIG. 2, only the state of one end is shown, but the state of the other end is the same and will not be described.

The core-shaped main body 111 has, at its inner end,
An annular end plate 111a is provided.
insertion holes 111 for rotating the rotating shaft of the rotating machine at two locations separated by a predetermined length from the center point of
b is provided.

The pin base 112 has a disk-shaped pin base main body 1.
A flange 112b is provided on the outer peripheral edge of the flange 12a so as to extend in a direction opposite to the core body 111, and a pin 112c is provided on the outer peripheral surface of the flange 112b so as to protrude outward. The pin base main body 112a is provided with insertion holes 112d at two locations separated from the center point by a predetermined length for inserting the rotation shaft of the rotating machine and rotating in the circumferential direction.

A short tubular auxiliary member mounting portion 113 is provided on a surface of the pin base 112 on the side of the core main body 111.
The auxiliary member mounting portion 113 has a parallel surface portion 113a on the center side of the core body 111, and a ring-shaped front surface plate 113b provided inside the front end of the parallel surface portion 113a.
The inner diameter of 3b is substantially the same as the outer diameter of the core type main body 111. A cutting groove 113c is provided in the vicinity of a connection portion to the pin base 112 along the circumferential direction, and a parallel tube portion 113a is provided.
A protruding plate portion 113d protruding outward is provided between the groove 113c and the cutting groove 113c.

The auxiliary member 12 is a short tube made of polyvinyl chloride, and has an inner peripheral surface which is bent in an axially uneven shape. The auxiliary member 12 is provided with a groove 121 for mounting a packing and a groove 122 for mounting a retaining ring along the circumferential direction on the inner peripheral surface, and both sides of the grooves 121 and 122 extend parallel to the axial direction. 123 and the groove 12
An inclined surface portion 124 narrowing in the radial direction is provided at the end on the second side, and the inner peripheral surface and the outer peripheral surface are uneven surfaces along the axial direction. The inner diameter of the parallel surface portion 123 is substantially the same as the outer diameter of the auxiliary member mounting portion 113 of the cylindrical or cylindrical core mold 11.

[0020] The auxiliary member 12 can be obtained by the process as shown in FIG. 3, formed into the short tubular by vacuum forming using a polyvinyl chloride plate. First, as shown in FIG. 3 (a), a polyvinyl chloride plate 31 (manufactured by Kanchu Plastics Co., Ltd., trade name: “Kaidak”) 31 having a thickness of 3.0 mm is prepared. FIG. 3B shows a mold 32 for molding the auxiliary member, which has an outer surface shape corresponding to the inner peripheral surface shape of the auxiliary member 12 to be molded. Many pores having a diameter of 5 to 1 mm are provided.

As shown in FIG. 3 (c), the mold 32 is divided into four mold pieces 321, 322, 323 and 324 with two splits parallel to the axial direction. .
Then, after removing the two mold pieces 321 and 322 by moving them inward in the radial direction as shown by the arrows, the remaining mold pieces 323 and 324 are moved inward in the radial direction to remove the mold. Have been able to.

As shown in FIG . 3D, the plate 31 is heated from both sides by an electric heater 33, and the softened plate 31 is pressed against a mold 32 as shown in FIG.
As shown in FIG. 3 (f), air is suctioned from the pores of the mold 32 by vacuum, and the plate 31 is vacuum-formed along the mold 32. Thereafter, as shown in FIG.
The arrows at both ends are cut so that the auxiliary member 12 shown in FIG.
Get.

The assembly of the mold 1 is carried out as follows (see Figure 2). The auxiliary member 12 is provided on the outer peripheral surface of the core-type main body 111.
The pin base 112 is brought into contact with the end of the core main body 111 so that the auxiliary member mounting portion 113 connected to the end face is inserted into the end of the core main body 111.
The molding die 1 as shown in FIG. 2 is obtained by making d and the insertion hole 112d of the pin base 112 face each other.

Next, as shown in FIG. 4 (a), the rotating machine 4 used with a rotary shaft 41 that rotates in the circumferential direction, and FIG. 4 (b)
As shown in the figure, the rotating shaft 41 is inserted into the insertion hole 1 of the core type main body 111.
11b was inserted into the insertion hole 112d of the pin base 112, and the pin base 112 was pressed against the core body 111.

Although not specifically shown, the mold 1 is rotated in the circumferential direction by the rotating machine 4 shown in FIG. 4, and the pin 112c is impregnated around the mold 1 by the feed eye 2 shown in FIG. After the reinforcing fibers were wound so as to be hooked, the resin was heated and cured by a heater to form a cured fiber-reinforced resin layer 5 around the mold 1 as shown in FIG.

The cured fiber-reinforced resin layer 5 is provided with an outer peripheral surface at the center of the core main body 111 and an auxiliary member 12 mounted on the auxiliary member mounting portion 113 at the end of the cylindrical or columnar core 11. And the outer peripheral surface of the flange 112a of the pin base 112, and the fiber reinforced resin layer 5 and the outer peripheral surface of the auxiliary member 12 are integrally joined.

The portion indicated by the arrow in FIG . 5 is cut around the cutting groove 113c. The pin base 112 and the auxiliary member mounting portion 113 are removed, and then the core main body portion 111 is removed. As shown in FIG. 6, the auxiliary member 12 is integrally provided in the end of the fiber reinforced resin layer 5, and A socket-type fiber reinforced resin laminated pipe joint having a groove 121 for mounting a packing and a groove 122 for mounting a slip-off prevention ring provided on the surface thereof along the circumferential direction was obtained.

FIG . 7 is a sectional view showing an example of a molding die used for molding a fiber-reinforced resin laminated propeller shaft according to an embodiment of the present invention. The molding die 6 includes a cylindrical or cylindrical core die 61 and an auxiliary member 62 mounted thereon. The cylindrical or columnar core die 61 includes a cylindrical or columnar core main body 111 and a pin base 612. Since the core body 111 is the same as that described above, a detailed description thereof will be omitted. FIG. 7 also shows only the state of one end, but the state of the other end is the same and will not be described.

The pin base 612 has a disk-shaped pin base body 6.
A flange 612b extending parallel to the direction opposite to the core body 111 is provided on the outer peripheral edge of the flange 12a, and a pin 612c is provided on the outer peripheral surface of the flange 112b so as to protrude outward. At two locations separated by a predetermined length from the center point of the pin base body 612a, there are provided insertion holes 612d for inserting the rotation shaft of the rotating machine and rotating in the circumferential direction.

[0030] surface of the core-type main body 111 side of the pin base 612, the auxiliary member mounting portion 613 for mounting the taper short tubular auxiliary member. The auxiliary member mounting portion 613 includes:
The outer peripheral surface is a tapered portion 613a having a small diameter on the center side of the core-shaped main body 111, and a ring-shaped distal face plate 613b is provided inside the distal end of the tapered portion 613a.
The inner diameter of 13b is substantially the same as the outer diameter of the core-type main body 111. A cutting groove 613c is provided in the vicinity of the connection to the pin base 612 along the circumferential direction.

The auxiliary member 62 is made of polyvinyl chloride, and is a tapered short tubular integral member whose diameter gradually increases from one end having an inner diameter substantially the same as the outer diameter of the cylindrical or columnar core body 111. It consists of The inner peripheral surface of the auxiliary member 62 needs to have a tapered portion whose diameter gradually increases from one end, but the outer peripheral surface is not necessarily required. Further, it may be molded by vacuum molding using a polyvinyl chloride plate according to the process as shown in FIG. 3, or may be molded by injection molding using an appropriate thermoplastic resin.

The assembly of the mold 6 is performed by as follows (see Figure 7). The large-diameter end of the auxiliary member 62 is fitted to the auxiliary-member mounting portion 613 of the pin base 612, and the small-diameter end of the auxiliary member 62 is fitted to the end of the core body 111. 7, the pin base body 612a of the pin base 612 is brought into contact with the end plate 111a of the core main body 111, and the insertion hole 111b of the core main body 111 is inserted into the pin base 612.
The molding die 6 as shown in FIG. 7 is obtained by making the insertion holes 612d face each other.

Although not specifically shown, the molding machine 6 shown in FIG. 7 is rotated in the circumferential direction by the rotating machine 4 shown in FIG.
A pin 6 is formed around the mold 6 by the feed eye 2 shown in FIG.
After the curable resin-impregnated reinforcing fiber was wound around 12c so as to be hooked, the resin was heated and cured by a heater to form a cured fiber-reinforced resin layer 7 around the mold 6 as shown in FIG. . An auxiliary member 62 is integrally joined inside the end of the cured fiber reinforced resin layer 7.

The portion indicated by the arrow in FIG . 8 is cut, and the pin base 612 and the core-shaped main body 111 are removed, and as shown in FIG.
An auxiliary member 62 is integrally joined to the end of the fiber reinforced resin layer 7, and a tapered surface for transmitting a drive by contacting a yoke along the circumferential direction is provided on the inner peripheral surface of the end. A propeller shaft was obtained.

FIG . 10 is a cross-sectional view showing a one-tube connecting portion of a molding die used for molding a cheese-type fiber-reinforced resin laminated pipe joint according to an embodiment of the present invention. The molding die 8 comprises a cylindrical or columnar core body 111 and an auxiliary member 82 mounted thereon. Since the core type main body 111 is the same as the above, detailed description is omitted. Note that FIG.
In the figure, only the state of one pipe connection part of the cheese-like molding die 8 is shown, but the state of the other pipe connection parts is the same and will not be described.

The auxiliary member 82 is a short tube made of polyvinyl chloride, and has an inner peripheral surface which is bent in an axial direction into an uneven shape. The auxiliary member 82 is provided with a groove 821 for mounting a packing and a groove 822 for mounting a stopper ring along the circumferential direction on the inner peripheral surface, and the groove 821 for mounting a packing.
Also, both sides of the retaining ring mounting groove 822 are parallel plane portions 823 and 824 extending in parallel with the axial direction.

The retaining inclined surface 825 narrowed in the radial direction to the edge of the parallel surface portion 824 extending laterally of the ring mounting groove 824 is provided with, the inner diameter of the distal end portion of the inclined surface portion 825, the core mold body It is the same as the outer diameter of the portion 111.

An annular end plate 826 is provided inside the edge of the parallel surface portion 823 extending to the side of the packing mounting groove 821.
Is provided. An outer peripheral surface of the parallel surface portion 823,
At the position where the end face plate 826 is provided inward, a large number of pins 827 projecting outward are provided at regular intervals.

[0039] The auxiliary member 82 can be obtained by injection molding a suitable thermoplastic resin.

The assembly of the mold 8 is performed by as follows (see Figure 10). The auxiliary member 8 is provided on the outer peripheral surface of the core-type main body 111.
2 and the end on which the pin 827 is provided is
11 and fitted with an adhesive tape or the like to obtain a molding die 8 as shown in FIG.

Although not particularly shown, the molding die 8 shown in FIG. 10 is rotated in the circumferential direction using a rotating machine 4 as shown in FIG.
After being wound around hook 27, the resin was heated and hardened by a heater to form a hardened fiber reinforced resin layer 9 around the mold 8 as shown in FIG.
An auxiliary member 8 is provided inside the end of the cured fiber reinforced resin layer 9.
2 are integrally joined.

The cutting is performed at the portion indicated by the arrow in FIG.
12, the auxiliary member 82 is integrally provided in the end of the fiber reinforced resin layer 9, and the packing mounting groove 82 is formed on the inner peripheral surface along the circumferential direction.
1 and a socket-type fiber reinforced resin laminated pipe joint provided with a groove 822 for mounting a drop-off prevention ring.

The auxiliary member is not limited to the above, and as shown in FIG. 13, an uneven member 83 having an inner peripheral surface bent in an uneven shape in the axial direction, a short tubular spacer 84, and a ring with a pin. 85 may be combined. Also, FIG.
As shown in FIG. 4, an uneven member 86 which is bent in an uneven shape in the axial direction.
And a plurality of pin members 88 mounted between the uneven member 86 and the spacer 87.

[0044] Using the mold 1 shown in Embodiment 1 FIG. 2, a feed eye 2 shown in FIG. 1, using a winding machine 4 as shown in FIG. 4, as shown in FIG. 5, around the mold 1 The cured fiber-reinforced resin layer 5 was formed, and after the resin was cured, the mold was released, and a φ150 socket-type fiber-reinforced resin pipe joint was manufactured.

The auxiliary member 12 has a thickness of 3.0 mm.
The product was vacuum-formed by the process shown in FIG. 3 using a polyvinyl chloride plate (manufactured by Tsutsunaka Plastics Co., Ltd., trade name: “Kaidak”). As the core type main body 111, F
A RP plated with 0.5 mm thickness was used.

As the resin composition, an unsaturated polyester resin (manufactured by Nippon Shokubai Chemical Co., Ltd .: trade name "N @ 150AL")
100 parts by weight, 0.6 parts by weight of a curing agent (trade name “Kayamec M” manufactured by Kayaku Akzo Co., Ltd.), and an accelerator (6% cobalt)
(Content) of 0.5 parts by weight. As a reinforcing fiber in the resin-impregnated reinforcing fiber, glass roving (count 22
30 g / km) were used. In Feed Eye 2,
The operation of three axes of X, Y and Z was performed. Curing of the resin by the heater was performed at 50 ° C. for 2 hours.

The obtained socket-type fiber reinforced resin pipe joint has an excellent dimensional accuracy of the inner diameter of the pipe connection, and the tolerance of the inner diameter of the pipe connection (inner diameter: 150 mm) is ± 0.4.
within the range of ± 0.4 mm, which is the tolerance of the inner diameter of the joint having a nominal diameter of 150 mm of the rigid polyvinyl chloride pipe fitting for water supply according to JIS K6743.
0.3 mm.

Further , a pipe was connected to a socket-type fiber reinforced resin pipe joint, and a hydrostatic pressure fracture test and an internal pressure fatigue test (pulsation pressure: 0 to 20 kg / cm ² ) were performed. As a result, the pressure resistance without causing water leakage and destruction is 60 kg /
cm ² or more, and the internal pressure fatigue strength without causing water leakage and destruction was 30,000 times or more, which greatly exceeded the water supply standard of 20,000 times.

The hydrostatic pressure fracture test and the internal pressure fatigue strength were as follows:
As shown in FIG. 15, a short pipe 102 having a tapered socket is connected to each pipe connecting portion 101 of the socket-type fiber-reinforced resin pipe joint 10 obtained by the present invention through packing and a stopper, and the taper is formed. This was performed by covering the receiving port with a tapered flange 103 via packing. Hydrostatic pressure fracture test is performed by observing water leakage and destruction when increasing water pressure, and internal pressure fatigue test is
The test was performed by observing the state of water leakage caused by repeatedly applying a pulsating pressure of 0 → 20 → 0 kg / cm ² at 5 seconds / 1 cycle.

[0050] Instead of the mold of Example 2 socket, except for using the mold cheese type, examples and Similarly φ150─75 cheese fiber reinforced resin pipe fittings (main pipe inner diameter : 150
mm, inner diameter of the branch pipe: 75 mm). The obtained cheese-type fiber reinforced resin pipe joint has excellent inner diameter dimensional accuracy of the pipe connection part, and the tolerance of the inner diameter of the pipe connection part (inner diameter: 150 mm) of the main pipe part is ± 0.4 mm. It was ± 0.3 mm, which was well within the range.

Further , a pipe was connected to a cheese type fiber reinforced resin pipe joint, and a hydrostatic pressure fracture test was performed. As a result, the pressure resistance without causing water leakage and destruction is 60 kg /
cm ² or more. In addition, a pipe is connected to a cheese-type fiber reinforced resin pipe joint and subjected to an internal pressure fatigue test (pulsating pressure: 0 to 20).
kg / cm ² ). As a result, the number was 30,000 times or more, greatly exceeding the water supply standard of 20,000 times.

[0052] Example 3-core type body: it was used not subjected to plating made of FRP, in place of the mold socket, except for using the mold cheese type, in the same manner as in Example Φ15
No. 0 cheese-type fiber reinforced resin pipe joint (main pipe inner diameter: 1
50 mm, branch pipe inner diameter: 75 mm). The obtained cheese-type fiber reinforced resin pipe joint has excellent inner diameter dimensional accuracy of the pipe connection part, and the tolerance of the inner diameter of the pipe connection part (inner diameter: 150 mm) of the main pipe part is ± 0.4 mm. It was ± 0.3 mm, which was well within the range.

Further , a pipe was connected to a cheese-type fiber reinforced resin pipe joint, and a hydrostatic pressure fracture test was performed. As a result, the pressure resistance without causing water leakage and destruction is 60 kg /
cm ² or more. In addition, a pipe is connected to a cheese-type fiber reinforced resin pipe joint and subjected to an internal pressure fatigue test (pulsating pressure: 0 to 20).
kg / cm ² ). As a result, the number was 30,000 times or more, greatly exceeding the water supply standard of 20,000 times.

[0054] The mold 6 used in Examples 4 7, the feed eye 2 shown in FIG. 1, using a winding machine 4 as shown in FIG. 4, as shown in FIG. 8, to around the mold 6 The formation of the fiber-reinforced resin layer 7 and the release of the mold 6 were performed to obtain a fiber-reinforced resin laminated propeller shaft.

As the auxiliary member 62, a polypropylene resin (trade name "J-700" manufactured by Mitsui Petrochemical Co., Ltd.) having a thickness of 3 mm formed by injection molding was used. A SUS body was used as the core body.

As the resin composition, 100 parts by weight of an epoxy resin (trade name “LY556” manufactured by Ciba-Geigy) and a curing agent (trade name “HY917” manufactured by Ciba-Geigy) were added.
6 parts by weight and an accelerator (manufactured by Ciba-Geigy: trade name "DY")
0705 ") was used. As reinforcing fibers in the resin-impregnated reinforcing fibers, 10 carbon fibers (trade name: HM50 12K, manufactured by Petka Corporation) and glass roving (1,150 g / k, manufactured by Asahi Fiber Glass Co., Ltd.)
m) 10 pieces were used. The winding angle was 16 ° for carbon fiber and 90 ° for glass subbing. The feed eye 2 was operated in three axes of X, Y and Z. Curing of the resin by the heater was performed at 50 ° C. for 2 hours.

[0057] As a result, to obtain a fiber-reinforced resin laminate propeller shaft. The obtained fiber reinforced resin laminated propeller shaft has excellent dimensional accuracy of the inclined surface on the inner surface of the end for transmitting power by joining the yoke, and its tolerance is ± 0.2 mm.
Was in the range.

[0058] using a mold 8 shown in Embodiment 5 FIG. 10, using a feed eye 2, the winding machine 4 shown in FIG. 4 shown in FIG. 1, as shown in FIG. 11,
Forming a cured fiber reinforced resin layer 9 around the mold 8,
After the resin was cured, it was released from the mold and cut in the same manner as in Example 1 except that the resin was cut at the portion indicated by the arrow in FIG.
50 socket-type fiber-reinforced resin pipe joints (main pipe inner diameter: 150 mm, branch pipe inner diameter: 75 mm) were manufactured. The obtained socket-type fiber-reinforced resin pipe joint has excellent dimensional accuracy of the inner diameter of the pipe connection part, and the tolerance of the inner diameter of the pipe connection part (inner diameter: 150 mm) is sufficiently within a range of ± 0.4 mm. It was ± 0.3 mm.

Further , a pipe was connected to a socket-type fiber-reinforced resin pipe joint, and a hydrostatic pressure breaking test was performed. As a result, the pressure resistance without causing water leakage and destruction is 60 kg.
/ Cm ² or more. In addition, pipes are piped to the socket type fiber reinforced resin pipe joint, and the internal pressure fatigue test (pulsating pressure: 0 to 0)
20 kg / cm ² ). As a result, the number was 30,000 times or more, greatly exceeding the water supply standard of 20,000 times.

[0060] Comparative Example 1 the mold as the polypropylene resin (Mitsui Petrochemical Co., Ltd.
That a blow-molded product having a thickness of 3.0 mm and a product name of "J-700") was used, and that the resin-impregnated reinforcing fiber was wound on a molding die by a hand-layup method,
A socket-type fiber reinforced resin pipe joint similar to that of Example 1 was manufactured in the same manner as in Example 1, except that the mold was released from the mold by crushing the mold. The obtained socket-type fiber-reinforced resin pipe joint finally entered the range of ± 0.4 mm outside the range of ± 0.4 mm of the tolerance of the inner diameter of the pipe connection (inner diameter: 150 mm).

Further , a pipe was connected to a socket-type fiber reinforced resin pipe joint, and a hydrostatic pressure fracture test was performed. As a result, the pressure resistance without causing water leakage and destruction is 40 kg.
/ Cm ² . In addition, a pipe is connected to a socket-type fiber reinforced resin pipe joint and subjected to an internal pressure fatigue test (pulsating pressure: 0 to 20).
kg / cm ² ). As a result, the product satisfied the water supply standard of 20,000 times but stopped at 23,000 times.

[0062]

According to the present invention having the above-described structure, it is possible to form a fiber reinforced resin layer having excellent strength and pressure resistance, and it is possible to form a fiber having excellent inner diameter dimensional accuracy, surface smoothness and weeping resistance. Thus, a highly reliable fiber reinforced resin laminate having excellent strength and pressure resistance can be manufactured 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 sectional view showing a part of a mold used in the present invention.

FIG. 3 is an explanatory view showing an example of a molding step of an auxiliary member in a molding die used in the present invention.

FIG. 4 is an explanatory view showing an example of a winding machine used in the present invention, wherein (a) is a perspective view showing the winding machine, and (b) is a state in which a forming die is rotated using the winding machine. It is a partially notched front view which shows.

FIG. 5 is a cross-sectional view showing a state in which a fiber reinforced resin layer is formed around the molding die shown in FIG.

FIG. 6 is a cross-sectional view showing a part of a fiber-reinforced resin laminated pipe joint formed by using the forming die shown in FIG. 2;

FIG. 7 is a sectional view showing a part of another mold used in the present invention.

8 is a partially cutaway front view showing a state in which a fiber reinforced resin layer is formed around the mold shown in FIG. 7;

9 is a partially cutaway front view showing a part of the fiber-reinforced resin laminated propeller shaft formed using the forming die shown in FIG. 7;

FIG. 10 is a sectional view showing a part of another molding die used in the present invention.

11 is a cross-sectional view showing a part of a state in which a fiber reinforced resin layer is formed around the mold shown in FIG.

FIG. 12 is a partially cutaway front view showing a part of the fiber-reinforced resin laminated pipe joint formed by using the forming die shown in FIG. 10;

FIG. 13 is a cross-sectional view showing a part of another mold used in the present invention.

FIG. 14 is an explanatory view showing a part of another molding die used in the present invention, (a) is a cross-sectional view showing a part of the molding die,
(B) is an enlarged perspective view showing a part thereof.

FIG. 15 is a partial longitudinal sectional view showing a connection part in a hydrostatic pressure test and an internal pressure fatigue test of the fiber reinforced resin pipe joint obtained according to the present invention.

[Explanation of symbols]

 1,6,8 Mold 2 Feed Eye 4 Winder 5,7,9 Fiber Reinforced Resin Layer 10 Fiber Reinforced Resin Pipe Joint 11,61 Core Mold 12,62,82 Auxiliary Member 31 Plate 32 Mold 33 Electric Heater 41 Rotating shaft 111 Core type main body 112,612 Pin base 113,613 Auxiliary member mounting part 121,122,821,822 Concave groove 123,823,824 Parallel plane part 124,825 Inclined plane part 827 pin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI B29L 31:24 (58) Fields investigated (Int.Cl. ⁷ , DB name) B29D 23/00 B29C 70/16 F16L 47/00

Claims (1)

(57) [Claims] 1. A short tubular auxiliary member having an inner peripheral surface bent in an uneven shape in the axial direction and provided with a pin protruding outward from an outer peripheral surface at one end, is provided as a cylindrical or cylindrical core type auxiliary member. A mold is formed by mounting the pin on the end so that the end provided with the pin faces the edge of the cylindrical or cylindrical core mold, and the curable resin impregnation is strengthened around the mold. The fiber is wrapped around a pin to form a fiber reinforced resin layer, the resin is cured, and the auxiliary member is integrally joined to the end of the cured fiber reinforced resin layer. A method for producing a fiber-reinforced resin laminate, characterized in that a portion of the auxiliary member provided with pins is cut and removed.