JPH05272031A - Production of reinforcing substrate for composite material - Google Patents

Abstract

PURPOSE:To make it possible to readily and surely carry out positioning of a yarn inserting member in the direction of thickness when operation for replacing a yarn in the direction of thickness for binding a laminated yarn group with a regulating member is carried out using a member for inserting the yarn in the direction of thickness and prevent inserting miss. CONSTITUTION:A laminated yarn group 4 providing at least biaxial orientation is formed by a yarn layer in which a yarn is arranged in folded state between pins 2 with a prescribed pitch on a substrate. Then the laminated yarn group 4 is removed from the substrate together with the pins 2 and a needle 6 as a member for inserting a yarn in the direction of thickness is inserted into a space 4a formed after removing the pins 2 and the yarn (z) in the direction of thickness is inserted into the laminated yarn group 4 in folded state. A yarn P for stopping falling-out is inserted into a folding loop of the yarn (z) in the direction of thickness on the side opposite to the inserting side of the yarn in the direction of thickness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to replace a regulating member with a thickness direction yarn after laminating a required number of yarn layers formed by arranging yarns in a folded shape between regulating members arranged at a predetermined pitch. The present invention relates to a method for manufacturing a reinforcing base material for a composite material, which combines the layers.

[0002]

2. Description of the Related Art Orthogonal triaxial three-dimensional woven fabric (three-dimensional fibrous structure) consisting of three-component yarns in the X, Y, and Z directions, or arranged diagonally to the longitudinal direction in addition to the orthogonal triaxial fabric. A composite material in which a 5-axis three-dimensional woven fabric containing a component thread is used as a skeleton material and a resin or an inorganic material is used as a matrix is expected to be widely used as a structural material for rockets, aircrafts, automobiles, ships and buildings.

As a method for producing a three-dimensional fiber structure, there is a method in which a plurality of yarn layers formed by arranging the yarns in a folded shape are laminated and the yarn layers are joined by the yarns arranged in the thickness direction. .. For example, in Japanese Unexamined Patent Publication No. 63-42955, as shown in FIG. 13, a plurality of yarn guide tubes 32 are vertically arranged on a base plate 31 at predetermined intervals, and a plate is provided between the yarn guide tubes 32. -Shaped separators 33 are arranged in parallel, and plate-shaped spacers 3 are arranged on the separators 33 in a state orthogonal to the separators 33.
4 is arranged, the first endless yarn Y1 is attached to the spacer 3
4 is arranged in a meandering direction in a direction orthogonal to the arrangement direction of 4 and then arranged in a meandering direction in a direction orthogonal to the arrangement direction to repeatedly arrange a predetermined number of layers of yarns, and then the spacer 34 is arranged on the yarn laminated body. Is arranged in the same manner as described above, the yarn laminated body is tightened from above and below by the spacer 34, and then the yarn guide tube 32 is replaced with the second endless yarn Y2 to produce a reinforcing base material for composite material. Is disclosed.

To replace the yarn guide tube 32 with the second endless yarn Y2, the separator 33 is sequentially removed, and the yarn guide tube 3 is replaced.
2 is pulled up to the vicinity of the spacer 34 located below,
The second endless yarn Y2 is bent in a loop shape and hooked on the yarn guide 35, and the loop L thus formed is inserted into the yarn guide tube 32 while being retained by the yarn guide 35. Then, the yarn guide tube 32 is pulled up, and the loop L is pulled out to the upper surface of the yarn laminated body formed by the first endless yarn Y1. In this state, the yarn guide tube 32 is removed, and the third endless yarn Y3 is inserted into the loop L as a thread. Then, the second endless yarn Y2 is pulled back to tighten the yarn laminated body. Thereafter, the same operation is repeated for the number of the yarn guide tubes 32, whereby the replacement of the yarn guide tubes 32 with the second endless yarn Y2 is completed, and the reinforcing base material for composite material is manufactured. .. Further, a method of using a pin having a yarn locking portion instead of the yarn guide tube 32 is also disclosed.

Further, Japanese Patent Publication No. 61-30059 discloses a method of manufacturing a three-dimensional fiber structure by sewing a plurality of secondary element layers or thread layers which are superposed on each other with a sewing machine. As shown in FIG. 14, the sewing machine used at that time has an auxiliary needle 37 in addition to the sewing needle 36. The thread layer 38 is sewn by a lock stitch formed by a sewing thread 39 and a shuttle thread 40. Then, before the sewing needle 36 penetrates the thread layer 38, the auxiliary needle 37 is stuck into the thread layer 38,
The sewing needle 36 can be easily inserted.

[0006]

[Problems to be Solved by the Invention] JP-A-63-4295
In the method disclosed in Japanese Patent Publication No. 5, the yarn guide tube 32 functions as an inserter for the second endless yarn Y2 which is the connecting yarn of the yarn laminated body, and the yarn guide tube 32 is removed at the same time. Two endless yarns Y2 are inserted into the yarn stack. However, in this method, it is necessary to pull out the yarn guide tube 32 to the side opposite to the insertion side of the yarn guide 35. Therefore, there is no particular problem as long as the reinforcing base material for composite material is flat, but the reinforcing base material for composite material is U
There are two faces that face each other, such as a letter shape and a box shape, and if the interval is narrow, a problem occurs. That is, when pushing the yarn guide tube 32 toward the opposite surface, the yarn guide tube 32
In some cases, it cannot be removed because it is stuck on the facing surface. Further, when the yarn guide tube 32 is pulled out in the direction away from the facing surface, it becomes difficult to insert the yarn guide 35 holding the second endless yarn Y2 into the yarn guide tube 32. ..
Also, when using a pin having a thread locking portion, there is a similar problem, and when a large reinforcing base material for composite material is required, a pin having a special structure is used. There is also the problem that it is necessary to prepare tens of thousands.

On the other hand, in the method disclosed in Japanese Examined Patent Publication No. 61-30059, a plurality of layers of secondary element material or thread layers are sewn together with a sewing machine. No need to replace. But,
The fiber materials used for the reinforcing base material for composite materials are often glass fibers, carbon fibers, ceramic fibers and the like, which have low elongation and are brittle. Therefore, when the auxiliary needle 37 is penetrated through the dense fiber tissue, a part of the fiber tissue tends to be broken.
In addition, it is difficult to secure a sufficient space for smoothly inserting the sewing needle 36 through which the sewing thread 39 is passed in the trace of the removal of the auxiliary needle 37. Therefore, there is a problem that the fibrous tissue will be damaged again when the sewing needle 36 is inserted.

Further, after the yarns are arranged in a folded manner between the regulating members (pins) arranged at a predetermined pitch on the substrate to form a laminated yarn group, the yarns for bonding (thickness direction yarns) are held and replaced. There is also a method of replacing the pin with the thickness direction thread by using a member for use. In this case, the replacement member is brought into contact with the pin, and the thickness direction thread is inserted into the trace of the pin being removed while the replacement member is pushing out the pin. Therefore, it is necessary to remove the pins from the substrate prior to the replacement work. However, when the pin is removed from the substrate, both ends of the pin become free, the pin is tilted under the pressure of the laminated yarn layers, and the position of the tip becomes unstable. Therefore, it is difficult to mechanically bring the replacement member into contact with the pin, and it is difficult to perform replacement automatically by a machine instead of manually without an insertion error.

The present invention has been made in view of the above problems, and an object thereof is to perform a replacement work of a regulating member used when forming a laminated yarn group and a thickness direction yarn for connecting the laminated yarn group. Provided is a method of manufacturing a reinforcing base material for a composite material, which can easily and surely position the thickness direction thread insertion member when using the thickness direction thread insertion member and can prevent insertion error. To do.

[0010]

In order to achieve the above object, in the present invention, at least biaxial orientation is achieved by a yarn layer in which yarns are arranged in a folded shape between regulating members arranged at a predetermined pitch on a substrate. In the method of manufacturing a reinforcing base material for composite material, in which the regulating member is replaced with a thickness direction yarn after the yarn group is formed, and the respective yarn layers are bonded to each other, the regulating member is removed from the laminated yarn group, and a trace of the regulating member being removed. The thickness direction thread insertion member is used to insert the thickness direction thread.

[0011]

The yarns are arranged in a folded manner between the regulating members arranged at a predetermined pitch on the substrate, and the yarn layers are sequentially laminated. Then, after the laminated yarn group having at least biaxial orientation is formed, the regulating member is replaced with the thickness direction yarn, and the respective yarn layers are combined. When replacing the regulating member with the thickness direction yarn, first, the laminated yarn group is removed together with the regulating member from the substrate. Next, the regulating member is sequentially extracted from the laminated yarn group, and the thickness direction thread is inserted into the extracted trace using the thickness direction thread insertion member.

Since the trace of the regulating member is located at a predetermined position corresponding to the arrangement position of the laminated yarn group, the work of associating the thickness direction thread inserting member with the above-mentioned trace of the thickness direction yarn inserting member is performed by the regulating member. The positioning becomes easier as compared with the work of contacting the tip of the. In addition, a space that is equal to or slightly smaller than the outer diameter of the regulation member is secured in the trace where the regulation member is pulled out. Therefore, the thickness direction thread insertion member is inserted into the laminated thread group with slight contact with the laminated thread group, and the restricting member is replaced with the thickness direction thread without substantially damaging the laminated thread group.

[0013]

【Example】

(Embodiment 1) A first embodiment of the present invention, which is embodied in the case of manufacturing a flat plate-like reinforcing base material for a composite material, will be described below with reference to FIGS.

When manufacturing a reinforcing base material for a composite material, a flat substrate 1 is used as shown in FIG. On the surface of the substrate 1, a large number of pins 2 as a regulating member for regulating the arrangement of the threads are erected so as to be attachable and detachable at a predetermined pitch. The first in-plane array yarn x, the second in-plane array yarn y, and the bias yarns B ₁ and B ₂ are respectively arranged on the peripheral edge of the substrate 1 with the support plate 3 arranged between the pins 2 of the substrate 1. The pins are arranged so as to fold back in a state of engaging with the pins 2 arranged in the section and sew between the pins 2, and the x yarn layer, the y yarn layer and the bias yarn layer are laminated and formed. The first in-plane array yarn x is shown in FIG.
As shown in (b), they are arranged so as to be folded back in a state of extending in parallel along the width direction of the substrate 1. As shown in FIG. 4A, the second in-plane array yarn y is arrayed so as to be folded back in a state of extending in parallel along the longitudinal direction of the substrate 1. Two
Bias yarn B ₁ constituting one of the layers of bias yarn layer
Are arranged so as to be folded back at an angle of + 45 ° with respect to the longitudinal direction of the substrate 1 as shown in FIG. As shown in FIG. 4D, the bias yarn B ₂ forming the other one of the two sets of bias yarn layers is arranged so as to be folded back at an angle of −45 ° with respect to the longitudinal direction of the substrate 1. It Various materials such as carbon fiber and glass fiber are used as the material of the fibers that compose each thread.

After the above yarn layers are laminated on the substrate 1 in a predetermined order to form a laminated yarn group 4, a pressure plate 5 is provided above the laminated yarn group 4 in parallel with the support plate 3 as shown in FIG. Deploy. Then, in order to increase the fiber density of the laminated yarn group 4 and adjust the thickness, the support plate 3
And the laminated yarn group 4 is compressed by the pressure plate 5.
This compression operation is performed by the in-plane array yarns x and y and the bias yarn B ₁ ,
It is preferable not only when all the arrangements of B ₂ are completed, but also to be carried out in small steps during the arrangement step of the yarns because the variation in fiber density is small and the density level can be increased. afterwards,
The laminated yarn group 4 is removed together with the pins 2 from the substrate 1. At this time, since the support plate 3 exists between the substrate 1 and the laminated yarn group 4, the pins 2 and the laminated yarn group 4 from the substrate 1
Can be easily removed. The in-plane array yarns x and y and the bias yarns B ₁ and B ₂ are formed on the central plane in the thickness direction of the laminated yarn group 4 in order to prevent warpage after the resin impregnation of the reinforcing base material for composite material. It is preferable to arrange them so as to be mirror-symmetrical with respect to the plane of symmetry.

Next, the laminated yarn group 4 removed from the substrate 1
The pin 2 inserted in the thickness direction thread z is replaced, and the laminated thread group 4 is joined by the thickness direction thread z. In order to replace the pin 2 with the thickness direction thread z, first, the pin 2 is pulled out from the laminated thread group 4, and the needle 6 as a thickness direction thread insertion member is drawn in the removal trace.
Is done by inserting. The needle 6 has substantially the same diameter as the pin 2. Further, the replacement of the pin 2 with the thickness direction thread z is performed simultaneously for each row of the pins 2 arranged in the width direction of the substrate 1, that is, the laminated thread group 4.

As shown in FIG. 1, the needles 6 are arranged in the same number and at the same pitch as the pins 2 for one row arranged in the width direction of the laminated yarn group 4. The needles 6 can be simultaneously moved up and down by an elevating mechanism (not shown). The thickness direction thread z is fed from a thickness direction thread supply unit (not shown). A tension adjusting unit 7 is provided between the thickness direction thread supply unit and the needle 6 to absorb the slack of the thickness direction thread z and apply a tension to the thickness direction thread z. The laminated yarn group 4 is sandwiched between the support plate 3 and the pressure plate 5, and is supported by a support device (not shown) in a state orthogonal to the moving direction of the needle 6. The support device is configured to move the laminated yarn group 4 in a direction orthogonal to the arrangement direction of the needles 6.

Next, the procedure for replacing the pin 2 with the thickness direction thread z will be described in more detail with reference to FIGS. For the sake of convenience, the number of pins 2 and the number of needles 6 are drawn smaller than in the case of FIG. Further, the support plate 3 and the pressure plate 5 are also omitted.

FIG. 5A shows a state in which the pins 2 for two rows and the thickness direction thread z are replaced. From this state, the pin 2 in the next row is pulled out from the laminated yarn group 4 by a pulling device (not shown). When the thread z in the thickness direction from the tension adjusting portion 7 to the needle 6 interferes with the withdrawal of the pin 2, the withdrawal is performed with the laminated yarn group 4 being moved to a position where the withdrawal of the pin 2 is not hindered. .. As the material of each yarn constituting the laminated yarn group 4, fibers having a small elongation such as glass fiber, carbon fiber, and ceramic fiber are used, but the original position is held for a while even if the pin 2 is pulled out. .. Therefore, a space that is approximately equal to or slightly smaller than the outer diameter of the pin 2 is secured in the mark where the pin 2 is pulled out from the laminated yarn group 4.

Next, the laminated yarn group 4 is moved so that the extraction mark 4a faces the needle 6 as shown in FIG. 5 (b). Since the positions of the extraction marks 4a are formed in the laminated yarn group 4 at the same intervals as the arrangement pitch of the pins on the substrate 1, by moving the laminated yarn group 4 to a predetermined position, the needles 6 can be easily and accurately extracted by the extraction marks 4a. It will be in a state of facing. From this state, the needles 6 are lowered all at once, and the needles 6 are inserted into the extraction marks 4a until the needle holes 6a appear below the laminated yarn group 4 (states of FIGS. 6A and 8A). As a result, the thickness direction thread z is inserted in a folded shape at the position where the pin 2 of the laminated thread group 4 was inserted. Since the needle 6 is inserted through the extraction mark 4a of the pin 2, the needle 6 is inserted into the laminated yarn group 4 with a slight contact with the laminated yarn group 4 and does not substantially damage the laminated yarn group 4.

Next, the retaining thread needle 8 advances along the arrangement direction of the needle 6 through the loop portion LP of the previously retaining thread P (the state of FIG. 6B). Needle for retaining thread 8
When the tip of the needle passes through the folded loop L of each thickness direction thread z held by each needle 6 and reaches the end of the laminated thread group 4, it stops. At this time, as shown in FIG. 8 (b), the retaining thread P connected to the retaining thread supply section is locked by the retaining thread needle 8.

Next, the retainer thread needle 8 is pulled back, and as shown in FIG.
As shown in (c), the retaining thread P is inserted into the folded loop L of the thickness direction thread z in a folded shape. Further, the loop portion LP of the retaining thread P is held in a state of being inserted into the loop portion LP of the retaining thread P previously inserted (FIG. 7).
(State of (a)). Thereafter, the needle 6 rises to the original position and is separated from the laminated yarn group 4, the thickness adjusting yarn z is pulled back by the action of the tension adjusting portion 7, and the thickness direction yarn z inserted into the laminated yarn group 4 is released. It is tightened in a state where it is retained by the retaining thread P (state of FIG. 7B).

Then, after a pair of the support plate 3 and the pressure plate 5 is removed, the same operation as described above such as pulling out the pin 2 is repeated. Thereafter, in the same manner, the pins 2 are sequentially replaced row by row with the thickness direction threads z.
As a result, each of the yarn layers constituting the laminated yarn group 4 has a thickness direction yarn z.
And the reinforcing base material for composite material is manufactured.

In this embodiment, the retaining thread P is used as described above.
Are arranged along the width direction of the laminated yarn group 4, while the thickness direction yarn z is arranged on the surface of the laminated yarn group 4 in the arrangement direction.
Is orthogonal to the arrangement direction of. Therefore, the thickness direction thread z and the retaining thread P act to suppress the laminated thread group 4 from the front and back surfaces thereof in directions orthogonal to each other. as a result,
Unlike the case where the thickness direction thread z and the retaining thread P are arranged in the same direction, generation of ridge-like periodic bulges in the same direction on both front and back surfaces of the laminated thread group 4 is suppressed. As a result, the fiber filling rate becomes uniform, the filling rate is increased, and the shape stability of the laminated yarn group 4 in the surface direction can be secured.

Also, in this embodiment, the pin 2 and the thickness direction thread z
Unlike the conventional case, the replacement with the above is performed all at once for the pins 2 for one row arranged in the width direction of the laminated yarn group 4, so that the productivity of the reinforcing base material for a composite material is improved.

Example 2 Next, an example embodied in the case of manufacturing a reinforcing base material for a composite material having a U-shaped cross section is shown in FIGS.
2 will be described. In this embodiment, as shown in FIG. 9, it is formed to be thicker than that of the previous embodiment,
A substrate 1 whose one end is formed in a semicircular shape is used. Pins 2 are provided on the upper and lower surfaces of the board 1 and on the arcuate surfaces continuous to both surfaces.
Are erected so as to be vertically attachable to and detachable from each surface at a predetermined pitch. A support plate 3 is arranged between the pins 2 of the substrate 1 along the width direction of the substrate 1 (direction perpendicular to the paper surface of FIG. 9). The bias yarns B ₁ and B ₂ , the first in-plane arranged yarn x and the second in-plane arranged yarn y are folded back in a state of engaging with the pins 2 arranged on the peripheral portion of the substrate 1 and between the pins 2. Are arranged so as to be sewn to form a laminated thread group 4.

After the yarn layers are laminated on the substrate 1 in a predetermined order to form the laminated yarn group 4, a pressure plate 5 is arranged outside the laminated yarn group 4. The pressure plate 5 has a U shape, and the support plate 3 is provided between the pins 2.
Are arranged in a state orthogonal to (the state of FIG. 9A). Then, after the laminated yarn group 4 is compressed by the support plate 3 and the pressure plate 5, the laminated yarn group 4 is removed together with the pins 2 from the substrate 1 (state of FIG. 9B).

Next, the laminated yarn group 4 removed from the substrate 1
The pin 2 inserted in the thickness direction thread z is replaced, and the laminated thread group 4 is joined by the thickness direction thread z. Also in this embodiment, the pin 2 and the thickness direction thread z are replaced by one row of pins 2 arranged in the width direction of the substrate 1, that is, the laminated thread group 4.
It is held all at once. The laminated yarn group 4 is sandwiched between the support plate 3 and the pressure plate 5,
The needle 6 is supported by a support device (not shown) in a state orthogonal to the moving direction of the needle 6. The support device is configured to be able to move the laminated yarn group 4 in a direction orthogonal to the arrangement direction of the needles 6 at a position where the plane portion of the laminated yarn group 4 corresponds to the needle 6. Further, at the position where the curved surface portion of the laminated yarn group 4 corresponds to the needle 6, the laminated yarn group 4 is configured to be rotatable around an axis extending through the center of curvature of the curved surface portion in the arrangement direction of the needles 6.

FIG. 10A shows a state in which after the pins 2 in the first row are extracted from the laminated yarn group 4, the laminated yarn group 4 is moved and arranged at a position where the extraction mark 4a corresponds to the needle. .. The pulling out of the pin 2 from the laminated yarn group 4 is performed at a position where the pulling device (not shown) does not interfere with the needle 6 and the thickness direction yarn z. From this state, the needles 6 are lowered all at once,
The needle 6 is inserted through the extraction mark 4a until a needle hole (not shown) appears below the laminated yarn group 4 (state of FIG. 10B). As a result, the thickness direction thread z is inserted in a folded shape at the position where the pin 2 of the laminated thread group 4 was inserted. Since the needle 6 is inserted through the extraction mark 4a of the pin 2, the needle 6 is inserted into the laminated yarn group 4 with a slight contact with the laminated yarn group 4 and does not substantially damage the laminated yarn group 4.

Next, the retaining thread needle 8 advances along the direction in which the needles 6 are arranged, and the tip thereof passes through the folded loop L of each thickness direction thread z held by each needle 6 and the laminated thread group is formed. It stops when it reaches the end of No. 4. Next, the retaining thread needle 8
Is pulled back, and the retaining thread P is inserted into the folded loop L of the thickness direction thread z in a folded shape. After that, the needle 6 rises to the original position and is separated from the laminated yarn group 4. Next, the thickness direction thread z is pulled back by the action of the tension adjusting portion 7, and the thickness direction thread z inserted into the laminated thread group 4 is tightened in a state in which it is retained by the retaining thread P, and the first row The replacement of the pin 2 with the thickness direction thread z is completed (FIG. 11).
(State of (a)).

Then, after one supporting plate 3 is removed, the pin 2 in the second row is pulled out, and the laminated yarn group 4 is moved to a position where the removal mark 4a corresponds to the pin 2 ( 11 (b) state). Next, after the needle 6 descends and is inserted into the withdrawal mark 4a, the retaining thread needle 8 is inserted into the loop portion (not shown) of the retaining thread P previously inserted and each needle 6
The thickness direction yarn z held in the direction is advanced through the inside of the loop-back loop L (state of FIG. 12A). Then, the retaining thread needle 8 is pulled back in a state where the retaining thread P connected to the retaining thread supply section is locked, and the retaining thread P is inserted into the folding loop L of the thickness direction thread z in a folded shape. It
Further, the loop portion of the retaining thread P is held in a state of being inserted through the loop portion of the retaining thread P previously inserted, as in the above embodiment. Next, the retaining thread P of the previously inserted part
After the loop portion is tightened, the needle 6 is raised to the original position, and the thickness direction thread z inserted into the laminated thread group 4 is tightened in a state where the thread z prevents the thread P from coming off.
Thereafter, in the same manner, the pins 2 are sequentially replaced row by row with the thickness direction threads z. As a result, the respective yarn layers constituting the laminated yarn group 4 are connected by the thickness direction yarn z to manufacture the reinforcing base material for a composite material.

According to the present invention, the pin 2 is pulled out to the outside of the laminated yarn group 4 even when the reinforcing base material for composite material has a U-shape having two opposing surfaces and the distance between the opposing surfaces is narrow. , Opposing surfaces do not hinder the work of pulling out the pin.

The present invention is not limited to the above-mentioned embodiment, and may be applied to the production of a reinforcing base material for composite material having a shape other than the above-mentioned embodiment, or a pipe may be used as a regulating member. .. Further, the direction in which the regulating member is pulled out from the laminated yarn group 4 may be opposite to the inserting direction of the needle 6 as long as the work is not hindered. Further, without inserting the needles 6 into the laminated yarn group 4 all at once, the needles 6 are divided into a plurality of groups, and the thickness direction yarn z is inserted into and pulled back from the laminated yarn group 4 for each group or one by one. Alternatively, the number of pins 6 in each row may be smaller than the number of pins 6, and the pins in each row may be divided into several times and replaced with the thickness direction thread z. In that case, it is better to pull out the pins for each pin to which the needle 6 is inserted, in accordance with the insertion timing.

Further, instead of sequentially inserting the loop portion LP of the retaining thread P into the loop portion LP of the retaining thread P that was previously inserted to prevent the loop portion from coming off, simply tighten the thickness direction thread z. The retaining thread P may be retained.
Further, instead of inserting the retaining thread P in a folded shape from only one of the laminated thread groups 4, the needle in which the retaining thread is inserted in the needle hole is used to alternately change the inserting direction of the retaining thread P to remove the retaining thread P. The retaining threads P may be arranged in a meandering state.

Further, the tilt angles of the bias yarns B ₁ and B ₂ constituting the laminated yarn group 4 may be other than 45 °, or the bias yarns B ₁ and B ₂ may be eliminated to form the triaxial orientation instead of the 5-axis orientation. , The bias yarns B ₁ and B ₂ forming the pair of bias yarn layers are arranged so as to form an inclination angle of 60 ° with respect to the second in-plane array yarn y, and the first in-plane array yarn x is formed. Alternatively, it may be uniaxially oriented, or the orientation direction of the in-plane array yarns may be arbitrarily selected to take measures to prevent warpage after resin impregnation / molding. The in-plane array yarns x and y and the bias yarns B ₁ and B ₂ forming each yarn layer may be formed of a plurality of yarns instead of being formed of one continuous yarn.

[0036]

As described above in detail, according to the present invention, since the thickness direction thread insertion member is inserted into the trace of the restriction member and the thickness direction thread is inserted into the laminated yarn group, the end portion of the restriction member is inserted. As compared with the case where the thickness direction thread insertion member is inserted into the laminated thread group while abutting against the and pushing out the regulation member, the positioning can be performed easily and surely, and the insertion error can be prevented. Further, since the pulling-out of the regulating member and the inserting work of the thickness direction thread inserting member are performed independently, the working space can be secured without being restricted by the size and shape of the reinforcing base material for a composite material. Therefore, it becomes easy to automatically perform the replacement work by a machine instead of manually. Further, since a space approximately equal to the outer diameter of the regulation member is secured in the trace of the regulation member being pulled out, the thickness direction thread insertion member is inserted into the lamination thread group with slight contact with the lamination thread group, and The restricting member can be replaced with the thickness direction thread without substantially damaging it.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a positional relationship of a laminated yarn group, needles and the like when a pin and a thickness direction yarn are replaced in a first embodiment.

FIG. 2 is a schematic perspective view showing a substrate used for manufacturing a reinforcing base material for a composite material.

FIG. 3 is a supporting plate arranged on a substrate, a laminated yarn group,
It is a schematic perspective view which shows the state of a pressure plate.

FIG. 4 is a schematic view showing an arrangement state of in-plane array yarns and bias yarns.

FIG. 5 (a) is a schematic perspective view showing a state in which the second row of pins and the thickness direction thread have been completely replaced, and FIG. 5 (b) shows that the laminated thread group has been moved to a position where the extraction mark faces the needle. It is a schematic perspective view which shows a state.

FIG. 6A is a schematic perspective view showing a state in which a needle is inserted into a laminated yarn group, and FIG. 6B is a schematic perspective view showing a state in which a retainer yarn needle is inserted into a loop of thickness direction yarns. is there.

7A is a schematic perspective view showing a state in which a retaining thread is inserted in a loop of a thickness direction thread z, and FIG. 7B is a schematic perspective view showing a state in which a needle is pulled back to an original position. is there.

8 (a) is a schematic bottom view corresponding to FIG. 6 (a),
6B is a schematic bottom view corresponding to FIG. 6B, and FIG. 7C is a schematic bottom view corresponding to FIG.

FIG. 9 is a schematic cross-sectional view showing a relationship among a substrate, pins, a support plate, a pressure plate, etc. of the second embodiment.

FIG. 10 is a schematic cross-sectional view showing a replacement state of the pin and the thickness direction thread of the second embodiment.

FIG. 11 is a schematic cross-sectional view showing a replacement state of the pin and the thickness direction thread of the second embodiment.

FIG. 12 is a schematic cross-sectional view showing a replacement state of the pin and the thickness direction thread of the second embodiment.

FIG. 13 is a schematic cross-sectional view showing a procedure for replacing a yarn guide tube and an endless yarn of a conventional example.

FIG. 14 is a schematic perspective view showing another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Pin as a regulation member, 3 ... Support plate, 4 ... Laminated thread group, 4a ... Extraction mark, 5 ... Pressure plate, 6 ... Needle as a thickness direction thread insertion member, 6a ... Needle hole, 8 ... Needle for retaining thread, x ... First in-plane array thread, y ...
The array yarn second surface, z ... thickness direction thread, B _1, B ₂ ... bias yarns, L ... loop, P ... lock yarn.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junji Takeuchi, 2-chome, Toyota-cho, Kariya city, Aichi stock company Toyota Industries Corp.

Claims (1)

[Claims] 1. A laminated yarn group having at least biaxial orientation is formed by a yarn layer in which yarns are arranged in a folded shape between regulating members arranged at a predetermined pitch on a substrate, and then the regulating member is formed by a thickness direction yarn. In the method for manufacturing a reinforcing base material for composite material, which replaces and bonds each yarn layer, the regulating member is removed from the laminated yarn group, and the thickness direction yarn inserting member is used after the regulating member is removed. A method for manufacturing a reinforcing base material for a composite material, wherein