JP3406570B2 - Spiral structure of woven fabric and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral structure of a woven fabric mainly used for a brake disc, a clutch disc, a booster nose, and other high-strength composite materials, and a manufacturing method which can be expected to be effective in mass production.

[0002]

2. Description of the Related Art For this kind of high-strength composite material, there is known a woven fabric (1) woven as an endless continuous spiral from a warp (y) and a weft (x) as shown in FIGS. In this spiral woven fabric (1), wefts (x) are arranged radially from the center (o) of the spiral, and are in an intersecting state in which parallel wefts (y) are supported.

[0003]

However, since this requires a special and expensive special weaving machine, it cannot be provided as a spiral woven fabric (1) at a very low cost, and the structure and yarn of the woven fabric are not provided. It is impossible to immediately respond to the demand for changing the thickness of the.

Even in the case of the woven spiral woven fabric (1), it is inevitable that the density of the weft (x) is high in the inner peripheral portion of the spiral and is low in the outer peripheral portion as a result. When it is applied as a rotary friction material such as a clutch disk and a clutch disk, it will be worn out early from the outer peripheral portion having a high peripheral speed.

In particular, the rotational frictional force acts intensively only in the direction perpendicular to the weft yarn (x), resulting in an extremely large difference from the load acting on the warp yarn (y). It is also clearly inferior in durability.

Furthermore, the spiral woven fabric (1) can be impregnated with a thermosetting resin only after being woven as a product thereof, and the impregnation is performed by a so-called vacuum impregnation molding method. As is customary, when a thermosetting resin is supplied to the inside of a vacuum-molding die that has been clamped for that purpose, the warp yarn (y) that receives the supply pressure is along the weft yarn (x) and the center of the helix ( o) It is easy to cause eye misalignment,
It is inevitable that the warp yarn (y) and the weft yarn (x) tend to shrink, which causes subsequent unevenness of the basis weight.

In this respect, as an invention for compensating for the decrease in the density of the weft (x) and making the basis weight uniform,
Japanese Patent Laid-Open No. 3-504401 has been proposed, but the weft insertion lengths of the wefts are not the same, and it is necessary to insert short wefts only in a part of the width direction of the spiral woven fabric. Therefore, the weaving mechanism is remarkably complicated, and an increasingly specialized and expensive weaving machine must be used.

As an invention for improving this, Japanese Patent Laid-Open No. 5-321071 has also been proposed, in which a large number of reed feathers (12b) are used to change the density of the warp (Sp). A special reed (1) arranged on the reed frame (12a) so that the interval (x) changes continuously in inverse proportion to the radial distance (R) from the spiral center (A).
2) must be prepared for production, which also goes against the achievement of mass production effects.

Even if the density of the warp (Sp) is changed, the density of the weft (Sf) intersecting with the warp (Sp) is low in the outer peripheral portion of the spiral and is high in the inner peripheral portion. It cannot be eliminated, let alone the concentrated action of the rotational frictional force on the weft thread (Sf) from the direction perpendicular to it is completely impossible. Inadequate squeezing for rotating friction materials.

[0010] Further, the above-mentioned Japanese Patent Laid-Open No. 5-321071.
In another embodiment shown in FIG. 6 of the issue, the weft thread (Sf) is preferably at a constant angle (θ) of 10 to 40 degrees with respect to the radial direction of the helix formed by the spiral fabric (S). Although it is tilted, its tilt angle range has its own limit.
Since it is a spiral woven fabric (S) in which wefts (Sf) are radially arranged from the spiral center (A), if the inclination angle (θ) is more than 45 degrees, the spiral shape This is because the shape stability of the woven fabric (S) is impaired, and conversely, if the woven fabric (S) is less than 10 degrees, the effect of tilting the weft (Sf) is lost, so that it is still reliable and durable as a rotary friction material. I have to say that it is inferior to.

[0011]

SUMMARY OF THE INVENTION The present invention is intended to improve these problems, and as a spiral structure of a woven fabric useful for that purpose, a carbon fiber woven prepreg of a three-dimensional structure impregnated with a thermosetting resin is used. Or / and a plurality of unit sheets formed into a donut shape from the aramid fiber woven prepreg and having a single slit formed along the radial line thereof and formed into a substantially C-shape of the same size,

The slits of the lower unit sheet and the upper unit sheet adjacent to each other are changed in phase in the spiral advancing direction by the same constant crossing angle within the allowable crossing angle range of about 30 to 120 degrees. In addition, by repeating the procedure of stacking and stacking so that the upper unit sheet is in a state of slipping into the lower surface of the lower unit sheet in the fan-shaped portion that intersects by a certain angle, the plurality of unit sheets as a whole have a uniform thickness. In addition to being laminated and integrated in a continuous spiral shape of, the laminated state is cured by heating the prepreg,

As a method for producing the above-mentioned spiral structure, first, a carbon fiber woven fabric prepreg or an aramid fiber woven prepreg having a three-dimensional structure impregnated with a thermosetting resin is punched into a donut shape,

Simultaneously with or after the punching,
Prepare a unit sheet that is almost C-shaped by engraving a single slit along the radius line of the donut shape.

Subsequently, in inserting and setting a plurality of unit sheets one by one in the centering jig and stacking them, the slits of the upper unit sheet following the slits of the preceding lower unit sheet are Within the allowable crossing angle range of about 30 degrees to 120 degrees, the phase is sequentially changed in the spiral advancing direction by the same constant crossing angle, and in the fan-shaped part crossing by the constant angle, the upper unit sheet of the following line is preceded. By stacking so as to dig into the lower surface of the side unit sheet, a plurality of the unit sheets are integrally laminated in a continuous spiral shape having a uniform thickness as a whole,

Finally, the prepreg is cured by hot pressing the laminated state with a hot press machine.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 showing the first embodiment of the present invention.
In (1) to (17), (A) is a unit sheet for forming the desired spiral structure (10) of the woven fabric, which is preliminarily added to the carbon fiber woven fabric or the aramid fiber woven fabric (M) such as epoxy resin, phenol resin, polyester, etc. From the semi-cured prepreg impregnated with the thermosetting resin, the doughnut type having a constant inner diameter (for example, about 100 mm) and outer diameter (for example, about 220 mm) and thickness (for example, about 0.25 mm), and By providing a single slit (S) for separation along the radius line, it is almost C-shaped.

Such a unit sheet (A) can be punched without any trouble by using a common general-purpose pressing machine by once cooling and solidifying the prepreg having the above-mentioned thickness, and after punching into a donut shape. It is preferable to engrave the separating slit (S) with another blade. Further, the unit sheet (A) thus prepared for preparation is then uncooled and returned to room temperature.

In this case, the design of the carbon fiber woven fabric or the aramid fiber woven fabric (M) is to densify the spiral structure (10) of the woven fabric according to the present invention. Y) and weft (X) are alternately combined one by one, plain weave and especially thin weave, which is most effective, but the other three original fabrics, twill weave and satin weave, are adopted. May be. It is also conceivable that one of the warp (Y) and the weft (X) is carbon fiber and the other is aramid fiber.

Then, by using a plurality of unit sheets (A) prepared as described above and superposing these in a semi-cured state as a prepreg as follows, a uniform thickness ( T) is laminated in a continuous spiral shape.

That is, referring to FIGS. 6 to 9, the method of sequentially superposing and stacking the plurality of unit sheets (A1), (A2), (A3) and (A4) will be described. Now, the unit sheets (A1) to (A1) will be described. A4) separation slit (S1) (S
2) When (S3) and (S4) are assumed to be hands of a clock, first, the slit (S1) of the first unit sheet (A1) is installed so as to point to the position (a) at 12:00, and this is used as a reference. , And then insert the second unit sheet (A2) into the slit (S
9) and that of the first unit sheet (A1) preceded by 2)
As it crosses at a constant angle (α) of 0 degree,
The layers are laminated with the phase changed to the position (b) at 3 o'clock.

Moreover, the first and second unit sheets (A1) (A
6 to 9 in the fan-shaped portion (W1) in which the slits (S1) and (S2) of 2) cross each other at a constant angle (α) of 90 degrees.
As is clear from, the second unit sheet of the subsequent line (A2)
Are superposed so that the first unit sheet (A1), which has been preceded by the above, will also dig into the lower surface.

Subsequently, at 6 o'clock, the third unit sheet (A3) is crossed at a constant angle (α) of 90 degrees, which is the same as that of the second unit sheet (A2) preceded by the slit (S3). And the second and third unit sheets (A
2) Even in the fan-shaped part (W2) where the slits (S2) and (S3) of (A3) cross each other at a constant angle (α) of 90 degrees,
After that, the third unit sheet (A3) in the subsequent row is also overlapped so as to be digging into the lower surface of the preceding second unit sheet (A2).

Further, at 9 o'clock, the fourth unit sheet (A4) is crossed at a constant angle (α) of 90 degrees which is the same as that of the third unit sheet (A3) preceded by the slit (S4). (3) and the third and fourth unit sheets (A3), which are laminated while the phase is changed to the position (d)
Even in the fan-shaped portion (W3) in which the slits (S3) and (S4) of (A4) cross each other at a constant angle (α) of 90 degrees, the third unit sheet (A4) preceded by the following fourth unit sheet (A4) ( A3) is piled up so that it also digs into the lower surface.

That is, a total of four unit sheets (A) are used, and in stacking and stacking these, the slit (S) is divided into four equal parts by a constant angle of 90 degrees ( α), the phase is sequentially changed in the moving direction of the clock hand (spiral moving direction), and the constant angle (α)
Only in the fan-shaped portions (W1), (W2), and (W3) that intersect with each other, the upper unit sheet (A) that follows is put into the lower surface of the lower unit sheet (A) that precedes it, and is overlapped. Unit sheet (A1) ~ (A
As a result, a total of 4 sheets of 4) are laminated in a continuous spiral shape having a uniform thickness (T) as shown in FIG.

In that case, since the unit sheet (A) is still in the semi-cured state of the thermosetting resin as a prepreg, it functions as a binder so to speak, and the adjacent unit sheets (A1) to (A1) in the vertical positional relationship. A4) The cohesive and self-adhesive joints will surely and firmly bond to each other, and there is no risk of misalignment between them. Further, since the unit sheet (A) as the prepreg pre-impregnated with the thermosetting resin is used, there is no possibility that the woven fabric (M) is misaligned.

When stacking a plurality of the unit sheets (A1) to (A4) one on top of another, a centering jig (11) as shown in FIG. 10 is used, and each unit sheet is placed on the surface thereof. Slits (S1) to (S) of (A1) to (A4)
4) Marks the letters of the clock that serves as a pointer and other appropriate position guide marks (a) to (d), and insert and set the unit sheets (A1) to (A4) one by one from above. Is preferred.

Then, the unit sheets (A1) to
Positioning guide marks (a) between adjacent (A4)
This is because, based on (d) to (d), it is possible to sequentially and accurately change the phase in the spiral advancing direction by a constant crossing angle (α). Incidentally, (11a) is a centering jig (1
The sheet pedestal of 1) and (11b) show a centering shaft that stands upright from its center.

In the case of the first embodiment, a total of four unit sheets (A1) to (A4) are used and the slits (S1) thereof are used.
~ (S4) Unit sheet (A) is divided into four equal parts 90
The unit sheets (A1) to (A1) to (A1) to (A1)
4), the fan-shaped portions (W1) to (W3) are shown in FIG.
As suggested by the enlarged view of 3, the unit sheet (A
1) to (A4), the warp (Y) and the weft (X), which are textured of the woven fabric (M), are in the same direction between adjacent upper and lower sides as a so-called uninterrupted continuous crossing pattern of the overlap. The result is arranged.

Further, in the structure of the first embodiment, when it is necessary to increase the overall thickness (T) of the laminated state, a plurality of unit sheets (A) corresponding to an integral multiple of four sheets. It suffices to stack and laminate by using the above-mentioned procedure in the same manner as described above, and then a laminated state having a uniform thickness (T) as a whole can be obtained.

In any case, since the plurality of unit sheets (A1) to (A4) laminated as described above are still in the semi-cured state of the thermosetting resin as the prepreg, this is followed by FIG. By hot pressing with a hot press machine (P) such as 15 to cure the prepreg,
Finish as a woven spiral structure (10) as in FIGS.

In both figures showing the hot press machine (P), (12) is an upper mold having a heater (13) incorporated therein,
Similarly, (14) is a lower mold having a built-in heater (15), and the unit sheets (A1) to (A4) in the laminated state constrained in the concave groove (14a) of the lower mold (14) are placed in the upper mold. By (12), the pressure is increased to a constant pressure (for example, about 200 to 300 tons) and the temperature is fixed (for example, about 17 tons).
It is heated at 0 ° C. for a fixed time (about 10 minutes). By doing so, a woven spiral structure (10) having high dimensional accuracy of the inner diameter, the outer diameter and the thickness can be obtained.

Such a woven spiral structure (10) can be effectively used as various composite materials for high speed brake discs, clutch discs, grinding wheels, rotors, etc. of vehicles, especially in the case of carbon fiber woven fabrics. The C / C composite (carbon fiber reinforced carbon molded body) or a carbon fiber reinforced SiC composite material in which metallic silicon is impregnated and reacted with the C / C composite can be applied.

18 and 19 show a second embodiment of the present invention, in which a total of eight unit sheets (A
1) to (A8) are used, and the adjacent slits (S1) to (S8) in the vertical positional relationship are divided by 8 degrees into the unit sheet (A), and the slits are divided by 45 degrees. The layers are stacked in a state in which the phase is sequentially changed in the spiral traveling direction.

That is, the total of eight unit sheets (A1)
In stacking (A8) to (A8), as shown in FIG. 18 corresponding to FIG. 6, first, the slit (S1) of the first unit sheet (A1) is moved to the position (a) at 12:00. It is installed so as to be oriented, and the slits (S2) to (S2) of the second to eighth unit sheets (A2) to (A8) are used as a reference.
8) are sequentially phase-shifted by a crossing angle (β) of 45 degrees, and the position (e) at 1:30, the position (b) at 3 o'clock, the position (f) at 4:30, and the position at 6 o'clock The positions (c), the position (g) at 7:30, the position (d) at 9 o'clock, and the position (h) at 10:30 may be arranged in a distributed state.

The rest of the configuration is substantially the same as that of the first embodiment, and only in the fan-shaped portions (W1) to (W7) intersecting at a constant angle (β) of 45 degrees, the trailing upper side is formed. It goes without saying that the unit sheet (A) overlaps with the lower surface of the lower unit sheet (A) that precedes it.

In the case of the second embodiment, the fan-shaped portions (W1) to (W) of the unit sheets (A1) to (A8) are used.
In 7), as is apparent from the enlarged view of FIG. 19 corresponding to FIG. 12, the unit sheet (A1) to (A8) of the woven fabric (M)
As a result, the warp (Y) and the weft (X) having the texture are arranged in different directions between the adjacent upper and lower sides as a so-called discontinuous crossing pattern.

Even in the configuration of the second embodiment,
By using a plurality of unit sheets (A) corresponding to an integral multiple of 8 sheets, the thickness (T) in the laminated state can be made large, and the overall thickness (T)
Can be kept uniform.

The above-described first and second embodiments are merely examples, and in short, the slits (S) of adjacent unit sheets (A) in the vertical position are circles (360 degrees) of the unit sheet (A). About 30 degrees to 120
As long as the phase is sequentially changed in the spiral advancing direction by the same constant crossing angle (α) (β) within the allowable crossing angle range of degrees, the overall thickness (T) of the laminated state of the plurality of sheets is made uniform. Can be formed.

In addition, the crossing angle (α) (β) is about 30.
If the degree is smaller than the degree, the overlapping areas of the fan-shaped portions (W1) to (W7) intersecting by the angles (α) and (β) become small, so that the adjacent unit sheets (A) are easily delaminated. . On the other hand, if the crossing angles (α) and (β) are conversely larger than about 120 degrees, the number of unit sheets (A) to be used will be small, so that the required thickness (T)
However, it is necessary to use many unit sheets (A).

From that meaning, the circle (3
(60 degrees) as an integral crossing angle that can be reduced, and is appropriately set within an allowable angle range of about 30 degrees to 120 degrees. Particularly, it can be said that 45 °, 60 °, 72 ° or 90 ° is practical. It goes without saying that when the crossing angle is 60 degrees, 6 sheets or an integral multiple of the unit sheet (A) is used, and when it is 72 degrees, 5 sheets or an integral multiple of the unit sheet (A) is used.

Further, FIG. 20 shows a third embodiment of the present invention corresponding to FIG. 13, and as is apparent from this, in any of the first and second embodiments, a plurality of unit sheets are provided. When (A) is superposed and laminated, it is preferable to interpose a nonwoven fabric sheet (16) of short fibers having a high affinity with both unit sheets (A) between the adjacent upper and lower parts.

That is, when the prepreg of the carbon fiber woven fabric (M) is used as the unit sheet (A), the carbon fiber is also used as the short fibers of the nonwoven fabric sheet (16), and the aramid fiber woven fabric ( When the prepreg of M) is adopted, aramid fibers are also used as the short fibers of the non-woven sheet (16), and the unit weight of the (long) fiber in the unit sheet (A) itself is, for example, about 5
And 00g / m ^2, it is preferable to differ the short fibers of basis weight in relation on the nonwoven fabric sheet (16) with which, for example, as about 50 g / m ^2.

Then, the at random fluffy short fibers of the non-woven fabric (16) completely fill the upper and lower mutual gaps of the adjacent unit sheets (A) and become a semi-cured state as a prepreg of the unit sheets (A). It is well kneaded and integrated with the thermosetting resin described in (1) to secure an extremely dense and high-strength laminated state, and further, it becomes an excellent woven spiral structure (10) with high plane accuracy. However, the non-woven fabric sheet (16) may be attached integrally to the lower surface of the preliminary unit sheet (A) in a backing state.

When a plurality of unit sheets (A) are laminated and laminated, a unit sheet made of a prepreg of carbon fiber woven fabric (M) and a unit sheet made of a prepreg of aramid fiber woven fabric (M) are prepared. It is also possible to laminate one sheet or a plurality of sheets alternately or irregularly in a mixed manner, and according to this, the performance exhibited by the two kinds of fibers can be obtained.
As a so-called complementary state, it can also be included in the spiral structure (10) of the fabric.

In the first and second embodiments, as shown in FIGS. 16 and 17, from a plurality of unit sheets (A), a spiral structure (10) of woven fabric integrally laminated in a flat disk shape as a whole. As is clear from the fourth embodiment of FIGS. 21 and 22, the plurality of unit sheets (A) are three-dimensionally curved to form a spiral structure (10) stacked and laminated in a conical shape. ), Such a woven spiral structure (10) can be used for high strength composite materials such as conical brake discs, booster noses, twister flyers and the like.

[0047]

As described above, in the spiral structure of the fabric according to the present invention, a carbon fiber fabric prepreg or / and aramid fiber fabric prepreg having a three-dimensional structure impregnated with a thermosetting resin is formed into a donut shape, and With a single slit provided along the radius line, a plurality of unit sheets shaped in a C-shape of the same size are formed.

The slits of the lower unit sheet and the upper unit sheet adjacent to each other are changed in phase in the spiral advancing direction by the same constant crossing angle within the allowable crossing angle range of about 30 to 120 degrees. In addition, by repeating the procedure of stacking and stacking so that the upper unit sheet is in a state of slipping into the lower surface of the lower unit sheet in the fan-shaped portion that intersects by a certain angle, the plurality of unit sheets as a whole have a uniform thickness. In addition to being integrally laminated in a continuous spiral shape and being cured by heating the laminated prepreg, there is an effect that the problems of the prior art described at the beginning can be completely improved.

That is, according to the above-mentioned constitution of the present invention, the unit sheet (A) which is the spiral structure (10) of the woven fabric is composed of the carbon fiber woven prepreg or the aramid fiber woven prepreg of the three original structure, Since the weft yarn (X) is heat-cured in a laminated state, the density of the weft yarn (X) is not likely to decrease in the outer peripheral portion of the spiral, and the weft yarn (X) is preliminarily impregnated with the thermosetting resin. There is also no risk of misalignment of the warp (Y).

In particular, when the spiral structure (10) of the present invention is used as a high-speed rotary friction material such as a brake disc and a clutch disc, the weft yarn (X) and the warp yarn (Y) of the fabric are alternately changed in direction. The load is both threads (X) (Y)
Therefore, the outer peripheral portion having a high peripheral speed is not worn at an early stage, and reliability and durability can be remarkably improved.

Further, a unit sheet (A) which is independent and independent in advance
In the case of a pig, the slits (S) between the lower unit sheet (A) and the upper unit sheet (A) adjacent to each other have the same constant within the allowable crossing angle range of about 30 degrees to 120 degrees. So that the phase changes in the spiral advancing direction by the crossing angle (α) (β) of the constant angle (α)
(Β) Fan-shaped parts (W1) (W2) (W
In 3), the upper unit sheet (A) is overlapped with the lower surface of the lower unit sheet (A) so that the lower unit sheet (A) is laid on the lower surface of the lower unit sheet (A). Since they are laminated and integrated in a uniform shape, there is no risk of peeling, and it can be provided as a woven spiral structure (10) with extremely high plane accuracy.

Such effects can be further enhanced by adopting the structure of claim 2 or claim 3, and in combination with the adoption of plain weave, it is remarkably precise and
A tough woven spiral structure (10) can be obtained.

Further, in the case of adopting any of the configurations,
As described in claim 4, if a short fiber non-woven fabric (16) having a high affinity for the two unit sheets (A) adjacent to each other in an up-and-down positional relationship is interposed and installed between them, it is even more preferable. It is possible to obtain the spiral structure (10) excellent in plane accuracy and bond strength.

Moreover, since the spiral structure (10) of the woven fabric according to the present invention has the above-mentioned constitution, the manufacturing method according to claim 5 can be adopted, and a common general-purpose press machine or centering cure machine can be adopted. By using the tool (11), the hot press machine (P) and the like, the spiral structure (10) can be extremely easily manufactured, and the mass production effect can be maximized.

Further, according to the manufacturing method of the sixth aspect, in combination with the use of the centering jig (11), the non-woven fabric sheet (16) is placed between the unit sheets (A) adjacent to each other. When interposing and setting, there is an effect that the nonwoven fabric sheet (16) can be performed extremely accurately and in sequence based on the guiding action of the centering jig (11), which is useful for improving workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a punching situation of a unit sheet according to the present invention.

FIG. 2 is a plan view showing the punched-out donut type unit sheet.

FIG. 3 is a plan view showing an engraved state of a separation slit for the donut-shaped unit sheet.

FIG. 4 is a partially enlarged plan view showing a plain weave state of a carbon fiber woven fabric or an aramid fiber woven fabric.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a plan view of an array state in which a total of four unit sheets according to the first embodiment of the present invention are sequentially phase-shifted.

7 is a perspective view showing a relational state of stacking and stacking in a spiral shape in FIG.

FIG. 8 is a perspective view of a part of FIG. 7 extracted and shown in the undercut state.

FIG. 9 is a perspective view showing the overlapping state in the fan-shaped portion.

FIG. 10 is a perspective view showing the positional relationship between a total of four unit sheets and a stacking centering jig.

FIG. 11 is a cross-sectional view showing a state where a total of four unit sheets are laminated and integrated.

FIG. 12 is a partially enlarged perspective view of FIG.

13 is an enlarged cross-sectional view taken along line 13-13 of FIG.

FIG. 14 is a cross-sectional view showing the mold release state of the hot press machine.

FIG. 15 is a sectional view showing a mold clamping state of the hot press machine.

FIG. 16 is a perspective view showing a finished state as a spiral structure of a woven fabric.

17 is an enlarged sectional view taken along the line 17-17 of FIG.

FIG. 18 is a plan view showing a second embodiment of the present invention corresponding to FIG.

FIG. 19 is a partially enlarged perspective view showing a second embodiment of the same as FIG. 12.

FIG. 20 is an enlarged cross-sectional view showing a third embodiment of the present invention corresponding to FIG.

FIG. 21 is a perspective view showing a fourth embodiment of the present invention corresponding to FIG.

22 is an enlarged cross-sectional view taken along the line 22-22 of FIG.

FIG. 23 is a perspective view showing a conventional spiral woven fabric.

FIG. 24 is an enlarged plan view of FIG. 23.

[Explanation of symbols]

(10) · Woven spiral structure (11) ・ Centering jig (11a) -Seat pedestal (11b) -Centering axis (12) ・ Upper mold (13) ・ Heater (14) ・ Lower mold (14a) ・ Concave groove (15) ・ Heater (16) ・ Nonwoven fabric sheet (A) (A1) to (A8) ・ Unit sheet (M) ・ Woven fabric (P) ・ Hot press machine (S) (S1) to (S8) ... Cutting slit (T) / thickness (X) ・ Weft (Y) ・ Warp (W1)-(W7) ・ Fan-shaped part (intersection) (Α) (β) · crossing angle

Claims (6)

(57) [Claims] 1. A doughnut-shaped carbon fiber woven prepreg of a three-dimensional structure impregnated with a thermosetting resin, and / or an aramid fiber woven prepreg, and a single slit provided along the radial line of the prepreg. A plurality of unit sheets shaped in a substantially C shape having the same size are formed in such a manner that the slits of the lower unit sheet and the upper unit sheet adjacent to each other are within an allowable crossing angle range of about 30 to 120 degrees. Procedure to superimpose and stack so that the phase changes in the same advancing angle in the direction of spiral movement, and in the fan-shaped part that intersects by a constant angle, the upper unit sheet also digs into the lower surface of the lower unit sheet. By repeating the above, a plurality of the above unit sheets are integrally laminated in a continuous spiral shape having a uniform thickness, and the laminated state is A spiral structure of a woven fabric, characterized in that the prepreg is cured by heating. 2. A plain weave is adopted as the structure of the carbon fiber woven fabric and / or the aramid fiber woven fabric forming the unit sheet, and a total of four or a plurality of integral multiples of the unit sheet are used.
The slits between the lower unit sheet and the upper unit sheet adjacent to each other are sequentially changed in phase in the spiral advancing direction by 90 degrees of the intersection angle, and the upper unit sheet is lower in the fan-shaped portion that intersects by 90 degrees. The spiral structure of the woven fabric according to claim 1, wherein the side unit sheets are stacked and laminated so as to be laid in the lower surface of the side unit sheets in order. 3. A plain weave is adopted as a structure of a carbon fiber woven fabric and / or an aramid fiber woven fabric forming a unit sheet, and a total of 8 unit sheets or a plurality of integer multiples thereof are used.
The slits between the lower unit sheet and the upper unit sheet adjacent to each other are sequentially changed in phase in the spiral advancing direction by the crossing angle of 45 degrees, and the upper unit sheet is lower in the fan-shaped portion crossing by 45 degrees. The spiral structure of the woven fabric according to claim 1, wherein the side unit sheets are stacked and laminated so as to be laid in the lower surface of the side unit sheets in order. 4. A short fiber non-woven sheet having a high affinity for both unit sheets is interposed between adjacent lower unit sheets and upper unit sheets. Or the spiral structure of the woven fabric according to 3. 5. First, a carbon fiber woven fabric prepreg or an aramid fiber woven prepreg having a three-component structure impregnated with a thermosetting resin is punched into a donut shape, and at the same time as or after the punching, the doughnut-shaped radial line is drawn. A single C-shaped unit sheet is prepared by engraving a single slit along it, and then a plurality of unit sheets are inserted and set into the centering jig one by one and laminated. The slits of the upper unit sheet following the slits of the preceding lower unit sheet are sequentially phased in the spiral advancing direction by the same constant crossing angle within the allowable crossing angle range of about 30 to 120 degrees. In the fan-shaped part that is changed and intersects by a certain angle, the upper unit sheet in the succeeding line is overlapped with the lower surface of the preceding lower unit sheet. By laminating and integrating a plurality of the unit sheets into a continuous spiral shape having a uniform thickness as a whole, finally, the laminated state is hot-pressed by a hot press machine to cure the prepreg. Of manufacturing spiral structure of woven fabric. 6. A short fiber non-woven sheet having a high affinity with a unit sheet is previously attached to and integrated with the lower surface of the unit sheet, or when the unit sheets are stacked, they are placed between the adjacent upper and lower portions. 6. An interposer set is performed.
A method of manufacturing the spiral structure of the woven fabric according to claim 1.