JPH08276504A - Manufacture of fiber reinforced resin molded article - Google Patents

Abstract

PURPOSE: To conduct the uniform winding of fibers with the same feed eye even when the fiber winding angle is changed by a method wherein the feed eye is tilted in oblique direction, in which the running direction side end of the feed eye is located lower than its other running direction side end, and the angle between the direction of the lateral one row of slits and the resin- impregnated fiber past through the feed eye is specified. CONSTITUTION: The angle between the direction x' of the lateral one row of slits 21,... and the longitudinal direction y' of a block plate 22 is 90 deg.. Fiber 30, each of which is fed in straight line along the block plate 22, pass through slits 21. The block plate 22 is made to be pivotable about the axis line in the direction of the fiber 30 fed to the slit 21 and about the axis center line normal to the surface including the resin-impregnated fiber 30 fed to the same slit 21. The feed eye 2 is tilted by the obliquely upward angle (α) under the state that the running direction side end e' of the feed eye is located at the lower position side. At the same time, the angle (θ) between the direction x' of the lateral one row of the slits 21,... and the resin-impregnated fiber 31 is made larger than the fiber wrapping angle (β) by tilting.

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 molded product, and more particularly to a method for producing by a filament winding method.

[0002]

2. Description of the Related Art When molding a fiber-reinforced resin molded product, a fiber impregnated with an uncured resin, for example, a roving (a large number of strands obtained by bundling a large number of filaments) is used as a feeding eye. A method in which one fiber is passed through a fiber pulling gap, and a plurality of these passing fibers are wound around a rotating mandrel while reciprocating the above-mentioned feeder eye, that is, a filament winding method is used. There is.

Conventionally, the above-mentioned field eye is shown in FIG.
As shown in FIG.
5'is fixed, and a plurality of guide pins 24 'orthogonal to the rotation axis direction of the mandrel are attached to this frame 25' at predetermined intervals. Pins orthogonal to the rotation axis direction of the mandrel are directly attached to the base. It is well known that a plurality of filaments are erected in a horizontal row at predetermined intervals (for example, Japanese Patent Publication No. 5-54416), and in the conventional filament winding,
A resin impregnated roving is passed through the slits 21 'between the pins, and the parallel arrangement direction of the pins and the running direction of the feed eyes are made parallel, that is, the feed eyes are held horizontally and reciprocate the feed eyes. It is running.

[0004]

In the above-mentioned filament winding, in the case of hoop winding, FIG. 12 (A) (plan view) and FIG. 12 (B) [RO in FIG. 12 (A)] (2) Cross-sectional explanatory view]
Even if the distribution of the fibers 31 ′ between 4 ′ and 24 ′ is uniform, in the case of helical winding, (a) in FIG. 13 (plan explanatory diagram) and (b) in FIG. 13 [(in FIG. B)), the direction of the fiber changes at the pin 24 ′ according to the winding angle β of the fiber, and due to the fiber tension f, the running direction of the feeding eye 2 ′ on the fiber. Since the component force fcosβ in the direction opposite to that acts on the fibers, the fibers between the pins are biased in the direction opposite to the running direction of the feedeye and are unevenly distributed.
Since it is wound around the mandrel in such an unevenly distributed state, uneven distribution of the wound fiber is caused, and an increase in void content and a decrease in product strength cannot be avoided.

This problem can be solved by using a feed eye with a smaller pin interval as the winding angle becomes smaller. However, the fiber eye is adjusted by changing the feeding eye at each winding angle. It is troublesome, for example, and the fiber winding amount per one rotation of the mandrel is also reduced, and from this point also, the production speed is inevitably reduced.

In the filament winding using the above-mentioned feeder eye, if the pin interval is a and the number of pins is m, the total winding width of the resin-impregnated fiber is am, and in the past, in order to ensure productivity. However, if the mandrel has an annular recess with a relatively narrow width, winding of this part is troublesome.

An object of the present invention is to produce a fiber reinforced resin molded product by the filament winding method without changing the feeding eye even if the winding angle of the fiber is different, and the fibers can be sufficiently fed with the same feeding eye. Another object of the present invention is to provide a method for producing a fiber-reinforced resin molded product, which allows the fiber-reinforced resin molded product to be wound in a uniform distribution. Further, the object of the present invention is to
When manufacturing multi-layer fiber-reinforced resin molded products with different fiber winding angles in each layer by the filament winding method, it is necessary to perform winding of all layers with a common feed eye while sufficiently guaranteeing the uniformity of fiber distribution in each layer. An object of the present invention is to provide a method for producing a fiber-reinforced resin molded product that enables the production.

Further, it is an object of the present invention to provide a method for producing a fiber reinforced resin molded product by the filament winding method which can ensure good workability even when the mandrel has an annular recess having a relatively narrow width. .

[0009]

A method for producing a fiber-reinforced resin molded product according to the present invention has a slit for passing a curable resin-impregnated fiber at regular intervals in a horizontal row, and a resin-impregnated fiber sent in. While reciprocating the feeding eye passing through the slit in the direction of the rotation axis of the mandrel, the resin-impregnated fiber that has passed through the feeding eye is wound around the rotating mandrel, and then the resin is cured. The feed eye is rotatable about an axis in the direction of the resin-impregnated fiber sent to the slit and about an axis perpendicular to the plane containing the resin-impregnated fiber sent to the slit. Between the lateral direction of the slits and the resin-impregnated fiber that has passed through the feeder eye, while inclining the feeder eye in an oblique direction with the running direction side end of the feeder eye as the low position side. The angle than winding angle of the fiber is a structure characterized by large.

The structure of the present invention will be described below with reference to the drawings. 1A is an explanatory view showing a filament winding method used in the method for producing a fiber-reinforced resin molded product according to the present invention, and FIG. 1B is a plan view showing FIG. 1A. FIG. In FIGS. 1A and 1B, 1 indicates a mandrel. Reference numeral 2 denotes a feed eye, which has slits 21, ...
The slit 2 is attached to the tip of the arm-shaped base plate 22.
The angle between the direction x ′ in the horizontal row of 1, ... And the longitudinal direction y ′ of the base plate 22 is a right angle, and the fibers 30 sent in a straight line along the base plate 22 pass through the slit 21. , Base plate 2
2 is rotatable about an axis in the direction of the fiber 30 sent to the slit 21 and about an axis perpendicular to the plane containing the resin-impregnated fiber 30 sent to the slit 21.

In this feed eye 2, as shown in FIG. 2, for example, plate-like guides 24 are arranged in parallel on the upper surface of a base 23, and column portions 25 are provided at both ends of the base 23. On the mandrel side of the provided guides 24, ..., Horizontal bars 26 having a substantially cylindrical shape are arranged vertically, and these horizontal bars 26 are fixed to the pillar portion 25 with a pin, so that adjacent guides and upper and lower horizontal bars are provided. A slit of the space surrounded by the bar can be used.

In (a) and (b) of FIG. 1, 31,
Indicates a curable resin-impregnated fiber that has passed through the feeder eye 2, and while the feeder eye 2 is traveling in the rotation axis direction X of the mandrel 1 (running speed v) on the mandrel 1 (rotation speed n, radius r). It is wound, β indicates a winding angle, and has a relationship of tan β = 2πrn / v. The feed eye 2 is a feed eye 2 as shown in FIG.
The end e ′ in the running direction of the vehicle is inclined downward at an angle α, and as shown in FIG. 1B, the horizontal direction x ′ of the slits 21, ...
The angle θ with the resin-impregnated fiber 31 passing through is larger than the winding angle β of the fiber by an angle γ.

With respect to the angles α and γ, when α = 0 and γ = 0 (conventional example), the resin-impregnated fiber passing through each slit 21 has the fiber in the traveling direction of the feed eye 2. Exerts a component force that is biased in the opposite direction, and the component force f
_As described above, ₁ is given by f ₁ = f cos β, where f is the tension of the fiber.

On the other hand, consider the case where α ≠ 0 and γ = 0. FIG. 3A shows the mechanical state of the fiber 31 in the slit 21 when α = 0 and γ = 0 described above. On the other hand, (b) of FIG. 2 shows α = 0, γ of (a) of FIG.
In contrast to the case of = 0, the dynamics of the fiber in the slit 21 when the feeding eye 2 is inclined at an angle α in an oblique upward direction with the running direction side end e ′ of the feeding eye being the low position side. It shows the target state. Since the feed eye 2 is inclined obliquely upward with the running direction side end e'of the feed eye being the low position side, the bottom surface of the slit 21 is against the biasing of the fibers in the slit 21, The force f ₂ that slides the fiber on its bottom surface is given by f ₂ = f ₁ cos α.

In addition, in FIG.
In contrast to (a), fiber e₂The fiber feed position is₁Of the
-For a fixed position, the radius is constant a (between the slit center points
Distance, that is, fiber feed spacing)
However, the running speed v of the feeder eye and the mandrel speed
Since the number of turns n and the winding radius r remain unchanged, the fiber e
₂The winding angle of is still β, and in (b) of FIG.
The dotted line f'is the fiber e in FIG.₂The field
Shows the phase (that is, the fiber e when α = 0₂
Of the field phase).

In FIG. 2B, the distance e ₁ p ₁ / the distance e ₁ p ₂ indicates the ratio of the change in the distance between the fibers.
In the case of the winding angle β, the inclination angle α of the feeding eye, and the fiber feeding distance a at the feeding eye, in the case of (b) in FIG. 2, from the sine theorem for the triangles e ₁ p ₁ p ₃ , a / sin
Since there is a relationship of (π−β) = interval e ₁ p ₁ / sin (β−α), the interval L between the fibers wound around the mandrel is L
= Asin (β-α) / sinβ, and the change ratio η of the interval is given by η = sin (β-α) / sinβ.

Next, consider the case where γ ≠ 0 and α = 0.
In this case, as is apparent from FIG. 1B, the component force f ₁ acting in the direction in which the resin-impregnated fiber passing through each slit 21 is biased in the direction opposite to the running direction of the feed eye 2.
Is given by f ₁ = f cos (β + γ).

The change ratio η of the spacing between the fibers is given by η = sin (β + γ) / sinβ. Therefore, when γ ≠ 0 and α ≠ 0, the force f ₃ for sliding the fiber on the bottom surface of each slit 21 is f _{1 in the} equation.
Introducing the expression into given by _{f 3 = fcos (β + γ} ) cosα, synergistic from eta = sin of the conversion rate eta spacing between fibers spacing change between the formula (β-α) sin (β + γ) / sin given by ² beta, if the number of articles of the slit is m, the total winding width W of the resin-impregnated fiber is given by W = amsin (β-α) sin (β + γ) / sin 2 β.

According to the method for producing a fiber-reinforced resin molded product according to the present invention, even in the helical winding having a small winding angle β, the deviation of the fiber is caused by adjusting the inclination angles α and γ of the feeding eye. By reducing the sliding force represented by the formula, it is possible to sufficiently maintain the uniformity of the distribution of the wound fiber in the helical winding on the mandrel. According to the method for producing a fiber-reinforced resin molded product according to the present invention, the inclination angle α of the feed eye is
By adjusting and γ, the fiber bundle width that can be obtained by the formula can be kept constant and wound.

In the present invention, in the case of filament-winding fiber-reinforced resin molded products having different winding angles, a feeding eye which can make the distribution of the winding fibers uniform under the standard slits described later is provided for each winding angle. The tilt angles α and γ can be obtained in advance, and a common standard feed eye can be used to mold these fiber-reinforced resin molded products.

In the present invention, in the case of filament winding a multi-layer fiber-reinforced resin molded product in which each layer has a different winding angle, the distribution of the winding fiber is made uniform with respect to the winding angle of each layer under a standard slit described later. The possible inclination angles α and γ of the feed eyes can be obtained in advance, and the filament winding can be performed in a continuous operation for all layers without replacing the feed eyes on the way.

In the present invention, as is clear from the above formula, since the total winding width W of the resin-impregnated fiber can be changed by adjusting the inclination angles α and γ of the feed eye, the mandrel has an annular recess. In this case, for example, in the case of a mandrel for forming a pipe joint having an annular recess in the receiving port as shown in FIG. 4, the resin-impregnated fiber 31 is wound around the recess 11 of the mandrel 1 and the resin-impregnated fiber 31 is wound completely. For winding the resin-impregnated fiber 31 around the convex portion, the feed eye 2 is inclined at angles α and γ set so that the width W ₀ is substantially equal to the width of the concave portion 11 and the winding is performed. It is also possible to wind the resin-impregnated fiber 31 by inclining the feed eye 2 at angles α and γ set so that the total winding width W ₀ is wider than the width of the recess 11.

In the present invention, when the winding angle β changes with the progress of winding, it is possible to adjust the tilt angles α and γ of the feed eye in conjunction with the change of the winding angle β. Although the standard size of the slit varies depending on the count of the fiber to be drawn, the width is usually set to 3 to 20 mm and the thickness is set to 2 to 8 mm.

The guide 24 has a flat plate having a thickness t of 2 to 5 mm and a depth s of 5 to 20 mm as shown in FIG. 5A, or a front and rear end thickness t as shown in FIG. Is 2-6
It is possible to use a curved plate having a radius of curvature of 50 mm or more on both side curved surfaces and a depth s of 5 to 25 mm (for a thin round pin, clogging of slits due to fiber fluffing and fiber breakage easily occur).

In order to produce a fiber-reinforced resin molded product according to the present invention, known filament winding equipment can be used except for the feeder eye, and FIG. 6 shows an example of the equipment. In FIG. 6, 41, ...
42 is a resin impregnation tank, 43 is an impregnating roll, 1 is a mandrel, and 2 is a feeder eye. For filament winding, the fiber 3 is pulled out from the bobbin 41 by the rotation of the mandrel 1, and further, The resin is impregnated through the impregnation tank 42, and then the resin-impregnated fiber is wound around the mandrel 1 while reciprocating the feeder eye 2 in the direction of the mandrel rotation axis.

After molding the resin-impregnated fiber by this filament winding, the molded body together with the mandrel is carried into a heating furnace and cured, and the product is obtained after demolding. As the form of the above fibers, roving is usually used, but tapes such as roving cloth tape, glass cloth tape, blind tape, chopped strand tape, continuous tape, etc. It is also possible to use a cup-shaped object. As the type of fiber, inorganic fibers such as glass fiber and carbon fiber, and organic fibers such as aramid fiber and polyethylene terephthalate fiber can be used. However, in terms of mechanical strength and cost, glass fiber is It is suitable.

The above-mentioned curable resin is usually an unsaturated polyester resin, vinyl ester resin, phenol resin,
A thermosetting resin such as an epoxy resin is used, but an ultraviolet curable resin can also be used. Regarding the feed eye 2, the feed eye is made rotatable about the axis of the fiber 31 sent to the slit 21 in the direction y ′ in FIG. 7 (rotation in U direction), including the mandrel rotation axis. It is indispensable to make the feed eye rotatable about the axis perpendicular to the horizontal plane (V direction rotation) and reciprocate in the mandrel rotation axis direction (X axis direction). In addition, the Z that normally approaches and separates horizontally from the mandrel
Axial movement, vertical vertical Y-axis movement, etc. are also possible.

The control of the movement / rotation of this field eye is
When the shape and the movement pattern of the mandrel differ depending on the shape and the movement pattern of the mandrel, and the shape and movement pattern of the mandrel are complicated, it is preferable to control the mandrel according to a predetermined program. The method for producing a fiber-reinforced resin molded product according to the present invention can be used for producing various tubular products, and can be used for producing not only straight tubular products but also curved tubular products and branched tubular products.

FIG. 8A shows an example of a mandrel used for manufacturing a curved tubular product. The mandrel is bent at approximately the center to form a symmetrical bent portion 51, and the inside is hollow.
End surfaces 52 are removably attached to both ends, and a shaft 53 is provided to project substantially at the center of each end surface 52, and the center of the bent portion can be divided into left and right by removable attachment from the inner surface side. In this case, the end surface portion 52 is detached, and the divided portion is disconnected from the inner surface side (usually bolted) so that the end portion 52 can be divided into right and left portions.

At both ends of the mandrel, fiber locking pins are provided so as to prevent the winding layer from collapsing when the direction of filament winding is reversed.
Not shown. In the above, when a pipe receiving part (which may have a packing mounting groove or a retaining ring mounting groove) is provided on at least one end of the curved tubular product, a split mold for forming the receiving port is attachable to and detachable from at least one end of the mandrel. Can be attached to.

FIG. 8B shows a winding device equipped with the above mandrel, which has rotating shafts 541 and 542 facing each other.
An arcuate guide arm 55 is attached to each of the mandrels, and a guide shoe 531 is attached to each shaft 53 at both ends of the mandrel.
Each guide shoe 531 is slidably supported by each arcuate guide arm 55, the arcuate centers of both arcuate guide arms and the mandrel center are substantially aligned, and the rotary shafts 541, 542 are also provided. The line connecting the two passes through the arc center of both arc-shaped guide arms 55, 55. Mandrel 50
In order to rotate the circular arc guide arm 55 as a guide, a pressure type telescopic cylinder is connected between the mandrel shaft and the circular arc guide arm on at least one side of both circular arc guide arms. However, it is not shown in the figure.

In order to wind the resin-impregnated fiber around the mandrel according to the present invention using the above winding device, as shown in FIG. 9A, the shaft 53 on one end side of the mandrel 50 is used.
Are positioned on the same axis as both the rotary shafts 541 and 542, the mandrel 50 is rotated at a predetermined rotational speed by driving the rotary shaft 541, and the feed eye 2 is moved under the predetermined tilt angles α and γ. Then, the filament is wound in the left half of the mandrel 50 by traveling at a predetermined speed in the X-axis direction (axial direction of the rotating shaft).

When the filament winding on the left half of the mandrel 50 is completed, the mandrel 50 is rotated as shown in FIG. 9B, and the other end of the mandrel 50 is shown as shown in FIG. 9C. Side shaft 53 to both rotary shafts 54
1, 542 are positioned on the same axis as the mandrel 50, and the filament winding of the right half portion of the mandrel 50 is advanced. After the filament winding on the right half of the mandrel 50 is completed, the running direction of the feedeye is reversed, and during this reversal, the tilt angle of the feedeye is adjusted to the above tilt angle + α.
And −γ to negative −α and −γ, respectively, and
Filament winding in the reverse direction is performed in the order of (c) in FIG. 9 → (b) in FIG. 9 → (a) in FIG.

The present invention is also applicable to the manufacture of a T-shaped pipe joint (where a branch pipe portion projects from the center of the main pipe portion and a rubber ring mounting groove or a retaining ring mounting groove is formed on the inner surface of each receiving port). It can be used. In this case, the T-shaped mandrel is
As shown in FIG. 5, a main pipe forming portion 62 and a branch pipe forming portion 61 can be separated, and each of the forming portions may have a segment structure capable of reducing the diameter.

In order to wind the resin-impregnated fiber around the T-shaped mandrel according to the present invention, first, as shown in FIG. 10B, the head of the branch pipe forming portion 61 of the T-shaped mandrel is covered by the winding device. The drive shaft side chuck 610 is brought into contact with the driven shaft side tailstock 620 of the winding device at the center of the back surface of the main pipe forming portion 62 to hold the mandrel between the winding device shafts, and the drive shaft 611 sets the mandrel at a predetermined position. The mandrel branch pipe forming portion 61 is rotated at a predetermined speed while rotating the feeder eye at a predetermined speed in the X-axis direction (axial direction of the rotating shaft) under predetermined inclination angles α and γ. Of filament winding.

When the filament winding of the branch pipe forming portion 61 of the mandrel is completed, the holding of the branch pipe forming portion is released, and both ends of the main pipe portion 62 of the mandrel are removed as shown in FIG. The drive shaft side chuck 610 and the driven shaft chuck 621 are sandwiched between the drive shaft 611 and the drive shaft 611 to rotate the mandrel at a predetermined rotational speed, and the feed eye is moved in the X-axis direction at predetermined inclination angles α and γ. The filament winding of the main pipe forming portion 62 of the mandrel is carried out by reciprocating at a predetermined speed in the axial direction of the rotating shaft).

As the material of the mandrel, a material having high rigidity and light weight is preferable, and examples thereof include metal molds such as mild steel, stainless steel, aluminum and duralumin, rubbers such as urethane rubber, and plastics such as polypropylene and polyethylene. The blow mold etc. which were shape | molded by can be used.

[0038]

When both the inclination angles α and γ of the feeding eye are 0 (conventional), the resin impregnated fiber receives the component force fcosβ due to the winding angle β and the fiber tension f, and the feeding force is fed into the slit of the feeding eye. Attempt to shift in the direction opposite to the doai running direction. On the other hand, in the filament winding method used in the present invention, due to the inclination angles α and γ of the feed eye, the force for sliding the fiber along the bottom surface of the slit is fcos (β + γ) cosα. Because of the helical winding, the inclination angle γ is positive (90 ⁰ >γ> 0 ⁰ ) even if the winding angle β is close to 0 ⁰ (90 ⁰ >γ> 0 ⁰ ) (the resin impregnation that has passed through the slit in the horizontal row direction and the feed eye). This condition is satisfied because the angle with the fiber is larger than the winding angle of the fiber), and the tilt angle α is 0 ⁰ <α.
Since it is <90 ⁰ (this condition is satisfied because the feeding eye is tilted in an oblique direction with the side end in the running direction of the feeding eye as the low position side), the force to slide it is It can be reduced sufficiently. Therefore, since the sliding force of the fiber along the bottom surface of the slit can be reduced by adjusting the inclination angles α and γ of the feed eye, even when the winding angle β is small, the deviation of the fiber in the slit can be prevented. Can be well prevented.

According to the present invention, the spacing of the wound fibers can be asin (β-α) sin (β + γ) / sin ² β, and therefore the spacing can be sin (β-α) sin (β + γ) / sin ² The ratio of β can be narrowed, and the gap between the points where the fiber density is a peak can be narrowed by the above-mentioned deviation, so that the peak dispersion intervals can be narrowed. Therefore, according to the present invention, the deviation of the fibers in the slit can be made small, and further, the small deviation can be densely generated in the distance, and the non-uniformity of the fiber distribution as a whole can be suppressed to a slight extent. .

Further, as compared with the case where the tilt angle α is used alone or the tilt angle γ is used alone, the effect can be increased by the synergistic action.

[0041]

【Example】

[Example 1] The fiber-reinforced resin molded product produced had a nominal diameter of 15
It is a 45 ⁰ bend tube of ⁰ . The curable resin composition contains an ortho unsaturated polyester resin (styrene content of about 4
0% by weight. Also, 100 parts by weight of a curing accelerator containing 6% cobalt naphthenate) and 0.7 parts by weight of methyl ethyl ketone peroxide (curing agent) were used, and the fiber was a glass fiber roving (count 45000 g).
/ Km) 10 pieces were used.

The mandrel and the winding device shown in FIGS. 8A and 8B are used, and the feed eye has 10 slits, the guide plate has a thickness of 3 mm, a depth of 10 mm, and a radius of curvature. Using a 50 mm curved plate, filament winding was performed in the same manner as described above with reference to FIG. First, the winding angle β = 90 ⁰ ,
Fi - was subjected to up-turn - tilt angle α = ⁰ 0 degree, off at γ = ⁰ 0. Then, Fi - degree tilt angle α to 30 ^0,
The inclination angle γ is adjusted to 45 ⁰ , and the winding angle β = 6
0 ⁰ gradually wound from one end to the other end of the mandrel, the Fi during wrapping mandrel other end - the inclination angle α -30 ⁰ degree, respectively adjusted the inclination angle γ to -45 ^0, Further, the helical winding is performed from the other end side of the mandrel to the one end side at a winding angle β = −60 ⁰ and repeated until a predetermined thickness is reached.

In this way, after the bending mandrel is subjected to filament winding, the fiber reinforced resin molded product is carried into the curing furnace together with the mandrel at a temperature of 80 ° C.
Curing was performed for 2 hours, and the mold was removed to manufacture a fiber-reinforced resin bend tube. In this way, 20 bend pipes were continuously formed. The average production time per unit was 8 minutes. No fluff or yarn breakage was observed in the slit of the feed eye.

Comparative Example 1 The same as Example 1 except that the inclination angles α and γ of the feed eyes were not adjusted and α = 0 and γ = 0. When an internal pressure resistance test with a hydrostatic pressure of 40 kg / cm ² was performed on these Example products and Comparative Example products, in Example 1, all 20 pieces passed. On the other hand, in Comparative Example 1, 12 out of 20 failed.

[Embodiment 2] The produced fiber reinforced resin molded product is a T-shaped pipe joint having a nominal diameter of 150, and a rubber ring mounting groove and a retaining ring mounting groove are provided on the inner surface of the pipe receiving port. The same curable resin composition and fibers as in Example 1 were used. For the feed eye,
Same as Example 1 except that a flat plate having a thickness of 3 mm and a depth of 10 mm was used for the guide.

The T-shaped mandrel shown in FIG. 10A is used. First, as shown in FIG.
Filament winding was applied to the branch pipe forming portion of the character-shaped mandrel. In the filament winding of the branch pipe portion forming portion, first, the winding angle β = 90 ⁰ around the branch pipe portion forming portion excluding the intersecting portion and the inclination angle α of the feed eye.
= 0 ^0, off at γ = ⁰ 0 - it was subjected to up winding. Then,
The angle of inclination α of the doeye is adjusted to 60 ⁰ , and the angle of inclination γ is adjusted to 45 ^0, and from one end of the mandrel toward the intersection, the intersection is included and the winding angle is β = 30 ⁰ , and the mandrel is being folded. And the tilt angle α of the field eye is -60
^The tilt angle γ is adjusted to ⁰ , and the tilt angle γ is adjusted to −45 ⁰ , and further, it is wound from the intersection of the mandrel to one end at a wrap angle β = −30 ⁰ to perform helical winding, and then the tilt angle α of the feed eye is set to 20. ⁰ and the tilt angle γ are adjusted to 45 ⁰ , respectively, and the wrap angle β from one end of the mandrel toward the intersection is β =
The winding angle is 70 ⁰ , and the tilt angle α of the feed eye is set to −20 ⁰ and the tilt angle γ is set to −4 during folding back at the mandrel intersection.
5 ⁰ respectively adjusted, further subjected to helical winding wound in winding angle beta = -70 ⁰ toward the one end from the intersection of the mandrel, then the above full the branch pipe portion forming portion except the intersection - a flop winding I gave it again.

In this way, after the filament winding of the branch pipe portion forming portion of the T-shaped mandrel,
As shown in (c) of FIG. 10, the filament winding of the main pipe portion forming portion of the T-shaped mandrel is performed by using the filament winding of β = 90 ⁰ , α = 0 ⁰ , γ = 0 ⁰ of the main pipe portion forming portion including the intersecting portion. −
Β = ± 30 ⁰ , α of the main pipe part forming part including the winding part and the crossing part
= ± 60 ⁰ , γ = ± 45 ⁰ helical winding, β = ± 70 ⁰ , α = ± 20 ⁰ , γ = ± 45 of the main pipe forming portion including the intersection
^{0 =} helical winding, β = 9 in the main pipe forming part including the intersection
Was carried out in-flops winding ^{- 0 0, α = 0 0} , γ = 0 0 of off.

In this way, after the filament winding of the entire T-shaped mandrel is carried out using the same feeder eye, the fiber reinforced resin molded product is carried into the curing furnace together with the mandrel at a temperature of 80 ° C. for 2 hours. Then, it was cured and demolded to produce a T-shaped fiber reinforced resin pipe joint.
In this way, 20 T-shaped fiber reinforced resin pipe joints were continuously manufactured. No yarn breakage occurred during production, and the average production time per yarn was 12 minutes. No fuzz was observed in the slit of the feed eye.

Comparative Example 2 The same as Example 2 except that the inclination angles α and γ of the feed eyes were not adjusted and α = 0 and γ = 0. Loving deviation in the slit of the feed eye during helical winding is significant (the width of the roving is about 30% of that during hoop winding), and fluffing on the pin is observed. The fiber waste was accumulated, the fibers were broken, the productivity was poor, and the average production time per unit was 35 minutes.

[Comparative Example 3] Compared with Example 2, the inclination angles α and γ of the feed eyes were not adjusted, and α = 0 and γ = 0 were set, and the guide eyes were circular pins. Same as Example 2 except used. The deviation of the roving in the slit of the feed eye during the helical winding was significant (the roving width was about 20% of that during the hoop winding), and fiber debris accumulated on the pin. The fiber was broken during the production of the 15th product, and the production time per one product was 38 minutes on average.

The products of Example 2 and Comparative Examples 2 and 3 were subjected to an internal pressure resistance test with a hydrostatic pressure of 40 kg / cm ^{2 in} the same manner as described above. In Example 2, 15 out of 20 failed, and in Comparative Example 4, 18 out of 20 failed.

[0052]

EFFECTS OF THE INVENTION According to the method for producing a fiber-reinforced resin product of the present invention, even in the case of helical winding, the winding distribution of fibers is the same as in the case of hoop winding under the use of the same feed eye. Can be made sufficiently uniform, the wall thickness can be remarkably stabilized especially in thin-wall molding, and a fiber-reinforced resin molded product excellent in quality and reliability can be molded.

Even if the width of the roving is widened and wound, these effects can be guaranteed, and a great improvement in productivity can be expected.

[Brief description of drawings]

FIG. 1 (a) is a perspective explanatory view showing a method for producing a fiber reinforced resin product according to the present invention, and FIG. 1 (b) is a plan view of FIG. 1 (a).

FIG. 2 is an explanatory diagram showing an example of a feed eye used in the present invention.

FIG. 3 (a) is an explanatory view showing a distribution state of fibers in a slit when both inclination angles α and γ of the feed eye are 0, and FIG. 3 (b) shows the feed eye. Tilt angle α ≠ 0,
It is explanatory drawing which shows the stress state of the fiber in a slit in case (gamma) = 0.

FIG. 4 is an explanatory view showing another example of the method for producing a fiber-reinforced resin product according to the present invention, which is different from the above example.

FIG. 5 is a perspective view showing another example of a guide used for the feed eye of FIG.

FIG. 6 is an explanatory view showing an example of a filament winding device used in the present invention.

FIG. 7 is an explanatory view showing the movement direction of a feed eye used in the present invention.

8A is a front view showing an example of a mandrel used in the present invention, and FIGS. 8B and 8C are front views showing an example of a rotating device of the mandrel.

9 (a), (b) and (c) of FIG. 9 are explanatory views showing the work procedure of the manufacturing method of the present invention using the mandrel and the rotating device of FIG. 8, respectively.

10 (a), (b) and (c) of FIG. 10 are explanatory views showing a T-shaped mandrel and a work procedure of the manufacturing method of the present invention using the mandrel.

FIG. 11 is a perspective view showing a conventional feed eye.

12 (A) is a plan view showing a hoop winding by a conventional filament winding method, FIG.
2 (b) is a cross-sectional view taken along line (b) of FIG.

13 (A) is a plane explanatory view showing a helical winding by a conventional filament winding method, and FIG. 13 (B) is a cross-sectional view taken along line (A) of FIG.

[Explanation of symbols]

1 Mandrel X Mandrel rotation axis direction 2 Feed eye 21 Slit x'Horizontal single row direction 30 Fiber sent to slit 31 Resin impregnated fiber (fiber that has passed through the feed eye) β Winding angle α Angle of the feed eye Angle γ Feed-eye tilt angle

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[Procedure amendment]

[Submission date] September 7, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

8 (a) is a front view showing an example of a mandrel used in the present invention, and FIG. 8 (b) is a front view showing an example of a rotating device of the mandrel.

Claims (1)

[Claims] 1. A slit for passing a curable resin-impregnated fiber at a constant interval in a horizontal row, and a feed eye for passing a resin-impregnated fiber sent through the slit is reciprocally moved in the direction of the axis of rotation of a mandrel. While, while curing the resin after impregnating the resin-impregnated fiber that has passed through the feeder eye is wound around a rotating mandrel, a method for producing a molded article,
The feed eye is rotatable about an axis in the direction of the resin-impregnated fiber sent to the slit and about an axis perpendicular to the surface containing the resin-impregnated fiber sent to the slit. The doeye is inclined in an oblique direction with the side end in the running direction of the feed eye being the low position side, and the angle between the horizontal row direction of the slit and the resin-impregnated fiber passing through the feed eye is determined from the winding angle of the fiber. A method for producing a fiber-reinforced resin molded product, which is characterized in that