JPH04357019A - Tubular body and manufacture thereof - Google Patents

Abstract

PURPOSE:To efficiently form an angling rod by using prepreg tape. CONSTITUTION:Tape 5 for forming tubular body is produced by overlapping narrow S prepreg tape ancillary materials 3 and 4 in continuous form, in each of which carbon fibers are paralleled lengthwise, and broad W prepreg tape base material 2 in continuous form, which is produced by paralleling carbon fibers widthwise, so as to coincide their lengthwise directions with each other. At the same time, the tape 5 for forming tubular body is wound round a mandrel 6 so as to place some widthwise part of the tape 5 for forming tubular body over the tape 5 for forming tubular body which has been wound in advance, and then fired so as to produce the tubular body concerned.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a tubular body used for fishing rods, golf shafts, etc.

0002

[Prior Art] Conventionally, in manufacturing this type of tubular body,
The prepreg having a length spanning the entire length of the tubular body was formed by winding multiple layers around a mandrel and firing.

0003

[Problems to be Solved by the Invention] When adopting the above manufacturing method, it is necessary to prepare a standard prepreg for each layer, which requires a manufacturing process such as cutting, and also Because it has a relatively large area, there are many cut ends, resulting in a poor yield. Furthermore, since the reinforcing fibers are aligned in different directions for each layer, it is not possible to use a common cutting pattern, which also contributes to poor yield. Not only in the process before winding as described above, but also in the process of winding the prepreg around the mandrel, we apply tension to the prepreg to increase its adhesion before winding it. Since it is a long product, the tension does not act uniformly over the entire length, and there is a problem that air gets trapped between the prepreg and the mandrel or between the prepregs, resulting in a void phenomenon. The first object of the present invention is to process the prepreg to be wrapped around a mandrel to eliminate the conventional drawbacks in the winding process, and also to efficiently cut the prepreg in the process before winding. The point is to propose.

0004

[Means for Solving the Problems] The characteristic configuration according to the first invention is that a long prepreg tape base material having a constant width formed by aligning reinforcing fibers in the width direction thereof is provided with reinforcing fibers in the longitudinal direction. A long prepreg tape auxiliary material having a width shorter than the width of the prepreg tape base material is stacked on top of each other with their respective longitudinal directions aligned to form a tubular body forming tape, This tape for forming a tubular body is provided with a polymerized part in which the prepreg tape base material and the prepreg tape auxiliary material are overlapped, and a non-polymerized part in which only the prepreg tape base material is overlapped, and With the width direction of the tape for forming a tubular body inclined at a certain angle, the overlapping portion is superimposed on the non-polymerized portion of the tape for forming a tubular body that has been previously wound, and the The process is performed by winding a tape for forming a tubular body and firing it, and its effects are as follows.

[0005]

[Function] To explain the manufacturing method step by step, as shown in Figure 5, (a) Prepreg tape of a certain width, which is thinner than the entire length of the rod material, is cut from the prepreg original, and the pieces are joined to make prepreg. A tape base material 2 is used. The direction of the reinforcing fibers is the width direction of the prepreg tape base material 2. (b) From the prepreg original, prepreg tapes having a width shorter than the width of the prepreg tape base material 2 are cut and then joined together to form the prepreg tape auxiliary material 3. The direction of the reinforcing fibers is the longitudinal direction of the prepreg tape auxiliary material 3. (c) A tape 5 for forming a tubular body is formed by overlapping prepreg tape auxiliary materials 3 on the surface of the prepreg tape base material 2 with their respective longitudinal directions aligned. (d) This tape 5 for forming a tubular body is placed on the mandrel 6 by setting the reinforcing fiber direction of the prepreg tape base material 2 at a small inclination angle with respect to the axial direction of the mandrel 6. Wrap it in a spiral shape. During the winding, the non-polymerized portion of the previously wrapped tubular body forming tape 5 is polymerized with the overlapping portion of the subsequent tubular body forming tape 5. (e) After this, post-processes such as firing are started. Therefore, by cutting the rod material into tapes with a width shorter than the entire length, the amount of scraps is reduced and the yield is increased. Also, standard patterns that need to be cut,
It is limited to two types: prepreg tape base material and prepreg tape auxiliary material, and has good cutting efficiency. Also, when wrapping the tubular body forming tape around the mandrel, since the width of the tubular body forming tape is shorter than the overall length of the tubular body,
Since the tension acts uniformly, there is little occurrence of void phenomena. Moreover, a plurality of layers of tubular bodies can be formed by simply winding the tubular body forming tape around a mandrel in one operation.

[0006]

[Effects of the Invention] As a result, it is possible to reduce the manufacturing cost by improving the yield, and even if there is a part where the diameter rapidly expands in the middle part of the tubular body, the thin tubular body forming tape is sufficient to cover it. It is possible to wrap the product while closely following the bend without creating voids, and it is possible to change specifications such as increasing the overlapping margin in areas where cracks are likely to occur, such as the opening at the tip of the tubular body, and decreasing it in other areas. As mentioned above, by making prepreg into tape, the manufacturing process for wrapping can be made easier and faster, while
We have now been able to propose a method for manufacturing a tubular body that has the same strength as a tubular body made by winding multiple layers of prepreg, one by one, arranged in a direction perpendicular to the direction of reinforcing fibers. In addition to the object of the first invention, the object of the second invention is to propose a method for manufacturing a tubular body that can improve strength such as crushing strength.

[0007]

[Means for Solving the Problems] The characteristic structure according to the second invention is that the inner surface of a long prepreg tape base material having a constant width is formed by aligning reinforcing fibers in the width direction. A long prepreg first tape having reinforcing fibers aligned and having a width shorter than the width of the prepreg tape base material.
The tape auxiliary materials are overlapped with their respective longitudinal directions aligned, and reinforcing fibers are arranged on the outer surface of the prepreg tape base material in the longitudinal direction so as to have a width shorter than the width of the prepreg tape base material. A certain elongated second tape auxiliary material made of prepreg is overlapped with each other in a state in which the longitudinal direction thereof is the same, and in a state in which the position is displaced in the width direction from the superposition position of the first tape auxiliary material made of prepreg. A tape for forming a tubular body is formed, and the tape for forming a tubular body has a first polymerized portion in which the first tape auxiliary material made of prepreg and the tape base material made of prepreg are superimposed, and the second tape auxiliary material made of prepreg. A second polymerized portion is formed by overlapping the material and the prepreg tape base material, and when this tubular body forming tape is wound around a mandrel, the tubular body is formed in the axial direction of the mandrel. With the width direction of the forming tape inclined at a certain angle, the second overlapping portion is superimposed on the first overlapping portion of the tape for forming a tubular body that has been previously wound, and the tubular body is attached to the mandrel. The body shaping tape is wound and fired to shape the body, and its functions and effects are as follows.

[0008]

[Operation] To explain the manufacturing method step by step, as shown in Figures 1 to 3, (a) Cut prepreg tape of a constant width W, which is thinner than the entire length of the rod material, from the prepreg original and connect them. Together, a prepreg tape base material 2 is prepared. The direction of the reinforcing fibers is the width direction of the prepreg tape base material 2. (b) First and second prepreg tapes having a width S shorter than the width W of the prepreg tape base material 2 are cut from the prepreg original, and they are joined to form prepreg tape auxiliary materials 3 and 4. The direction of the reinforcing fibers is the longitudinal direction of the prepreg tape auxiliary materials 3 and 4. (c) The first prepreg tape auxiliary material 3 and the prepreg tape base material 2 are placed on the inner surface of the prepreg tape base material 2.
A second tape auxiliary material 4 made of prepreg is superimposed on the outer surface of the tape auxiliary material 4 made of prepreg with their respective longitudinal directions matching, and the first auxiliary tape material 3 made of prepreg and the second auxiliary tape material 4 made of prepreg are stacked.
The tape 5 for forming a tubular body is formed by setting the tape base material 2 and the prepreg tape base material 2 such that they are shifted from their positions on both sides of the prepreg tape base material 2. (d) This tape 5 for forming a tubular body is placed on the mandrel 6 by setting the reinforcing fiber direction of the prepreg tape base material 2 at a small inclination angle with respect to the axial direction of the mandrel 6. Wrap it in a spiral shape. During the winding, the following second polymerization portion B is superposed on the first polymerization portion A of the tape 5 for forming a tubular body that has been previously wound. (e) After this, post-processes such as firing are started. Therefore, in the lowest layer of multiple layers, the direction of the reinforcing fibers is set in the circumferential direction of the tubular body, which increases the strength against cracking, and the direction of the reinforcing fibers in the upper layer is set in order from the bottom layer to the circumferential direction of the tubular body. They are set in orthogonal directions to increase the resistance to crushing.

[0009]

[Effects of the Invention] As a result, a tubular body with careful alignment of reinforcing fibers can be achieved even with tape-type prepreg, and the strength is equivalent to that of a tubular body formed by stacking multiple regular prepregs over the entire length of the tubular body. We have now been able to provide a manufacturing method that can express this. Therefore, there is no need to attach a local reinforcing pattern to the inner layer of a multi-layer regular prepreg, which is generally done. An object of the third invention is to provide a tubular body that can adopt a laminated structure depending on the required strength of each part of the tubular body.

0010

[Means for Solving the Problems] The characteristic configuration according to the third invention is to provide a long prepreg tape base material having a constant width formed by aligning reinforcing fibers in one direction, which is perpendicular to the one direction. A tubular body formed by stacking long prepreg tape auxiliary materials whose width is shorter than the width of the prepreg tape base material with the reinforcing fibers aligned in the direction of alignment, with their respective longitudinal directions aligned. The tape is wound so that a portion of the tape in the width direction overlaps with each other, and its functions and effects are as follows.

[0011]

[Effect] In other words, the overlapping margin of the tape for forming the tubular body is increased in areas that require cracking strength, such as the tip of the tubular body, to achieve a structure with increased strength, and in the middle area, which does not require as much strength. etc., it is possible to reduce the overlap and roll it roughly. Moreover, depending on the size of the overlap margin, there are two cases: a three-layer structure in which the prepreg tape base material that follows the overlapped portion of the prepreg tape base material and the prepreg tape auxiliary material is further layered; In the case of a four-layer structure in which the polymerized portion of the prepreg tape base material and the prepreg tape auxiliary material is further overlapped after the polymerized portion of the prepreg tape base material and the prepreg tape auxiliary material, it can be used carefully depending on the required strength. A laminated structure can be obtained.

0012

[Effects of the invention] As a result, the overlap margin can be changed arbitrarily, and by taking advantage of the effect of being able to change it arbitrarily, even the number of laminated prepreg tapes can be changed to create a tubular body that is more finely tailored to the required strength. can be provided. In addition, since the reinforcing fibers in each tape are aligned in one direction, compared to using a cross-shaped prepreg in which reinforcing fibers are woven vertically and horizontally, it can provide the same strength but is easier to wrap. To achieve the effect that the disorder of the fiber arrangement during manufacturing and the resin wrapping around the part where the reinforcing fibers intersect at right angles are small, and the occurrence of peeling phenomenon between the reinforcing fibers and the resin in those parts can be suppressed. You can also do it.

[0013]

EXAMPLE A method for manufacturing a rod material 1 as a tubular body will be explained step by step. As shown in Figures 1 and 2 (
b) A prepreg tape base material 2 of a constant width W, which is narrower than the entire length of the rod material 1, is cut from a prepreg original formed by aligning reinforcing fibers in one direction and impregnating a thermosetting resin such as an epoxy resin. . The direction of the reinforcing fibers is the width direction of the prepreg tape base material 2. This prepreg tape base material 2 has a width W of about 15 mm.

(b) First and second prepreg tape auxiliary materials 3 and 4 having a width S shorter than the width W of the prepreg tape base material 2 are cut from the prepreg original. The direction of the reinforcing fibers is the longitudinal direction of the prepreg tape auxiliary materials 3 and 4, and the thickness thereof is thinner than the thickness of the prepreg tape base material 2.

(c) A prepreg tape first auxiliary material 3 is provided on the inner surface of the prepreg tape base material 2, and a prepreg tape second auxiliary material 4 is provided on the outer surface of the prepreg tape base material 2.
overlap each other with their longitudinal directions matching, and
A first prepreg tape auxiliary material 3 and a second prepreg tape auxiliary material 4 are set in a state where they are shifted from each other at both ends of the prepreg tape base material 2 to form a tape 5 for forming a tubular body. This tape 5 for forming a tubular body has a first polymerized portion A in which the first tape auxiliary material 3 made of prepreg and the tape base material 2 made of prepreg are superimposed, the second tape auxiliary material 4 made of prepreg and the prepreg tape base material 2
A second polymerized portion B is formed by overlapping the two. The tape width S of the prepreg tape auxiliary materials 3 and 4 is set to less than half the width W, and with both 3 and 4 superimposed on the prepreg tape base material 2, the first polymerization portion A or the second polymerization portion A portion C that is not portion B (that is, a portion consisting only of the prepreg tape base material 2) is left on the tubular body forming tape 5. When the tubular body forming tape 5 is wound around the mandrel 6, this portion C is easily deformed along the side edges of the prepreg auxiliary materials 3 and 4 that have been previously wound.

(d) As shown in FIGS. 2 and 3, this tape 5 for forming a tubular body is attached to a prepreg tape base material 2.
The direction of the reinforcing fibers is set at a small inclination angle with respect to the axial direction of the mandrel 6, and the reinforcing fibers are wound spirally around the mandrel. When wrapping it around,
The following second polymerization portion B is polymerized onto the first polymerization portion A of the tape 5 for forming a tubular body that has been previously wound. During this winding, a braking force is applied to the rotating shaft 7 of the tape so as to press the tubular body forming tapes 5 and 5 together, and the tubular body forming tape 5 and the mandrel 6 with appropriate pressure. Appropriate measures may be taken, such as having the

(e) As shown in FIG. 4, after the winding is completed, a heat shrink tape 8 is wrapped around the upper surface of the tubular body forming tape 5. After this, post-processes such as firing begin. As described above, the rod material 1 formed by wrapping the tape 5 for forming a tubular body can be formed with a natural concave portion 1a when it is wrapped in layers, so water droplets are scattered by the unevenness of the concave portion 1a, and the rod material 1 is formed by wrapping the tape 5 for forming a tubular body. It also has the effect of preventing threads from adhering to the surface along with water droplets.

[Another Example] ■ As shown in FIG. 5, a prepreg tape auxiliary material 3 may be polymerized only on one side of a prepreg tape base material 2 to form a tubular body forming tape 5. In order to wrap this tape 5 for forming a tubular body around the mandrel 6, overlap the non-polymerized portion of the prepreg tape base material 2 with the polymerized portion of the prepreg tape base material 2 and the prepreg tape auxiliary material 3. Wrap it around. ■ The tubular body can be used not only as a fishing rod but also as a golf shaft and structural material.

It should be noted that although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Fig. 1] A perspective view showing a tape for forming a tubular body.

[Fig. 2] A perspective view showing how the tape for forming a tubular body is wound around a mandrel.

[Figure 3] Vertical side view showing the state in which the tape for forming a tubular body is wound around a mandrel.

[Fig. 4] A perspective view showing a state in which a forming tape is wound around a tubular body forming tape.

[Fig. 5] A longitudinal side view showing a state in which a tape for forming a tubular body according to another implementation is wound around a mandrel.

[Explanation of symbols]

2 Prepreg tape base material 3 Prepreg first tape auxiliary material 4 Prepreg second tape auxiliary material 5 Tubular object forming tape 6 Mandrel A First polymerization portion B Second polymerization portion

Claims (3)

[Claims] 1. A long prepreg tape base material (2) having a constant width formed by aligning reinforcing fibers in its width direction, and said prepreg tape base material having reinforcing fibers aligned in its longitudinal direction. The tape for forming a tubular object (
5), and at the same time form this tubular body forming tape (5).
) is provided with a polymerized part where the prepreg tape base material (2) and the prepreg tape auxiliary material (3) are overlapped, and a non-polymerized part of only the prepreg tape base material (2), and a mandrel (6). The tape for forming a tubular body (5) is wound in advance with the width direction of the tape for forming a tubular body (5) inclined at a certain angle with respect to the axial direction of the tape for forming a tubular body (5).
5) A method for manufacturing a tubular body, in which the polymerized portion is superimposed on the non-polymerized portion, the tape for forming a tubular body (5) is wound around the mandrel (6), and the tubular body is formed by firing. 2. The prepreg tape has reinforcing fibers aligned in its longitudinal direction on the inner surface of a long prepreg tape base material (2) having a constant width formed by aligning reinforcing fibers in its width direction. Layering a long prepreg first tape auxiliary material (3) having a width shorter than the width of the base material (2) with their longitudinal directions aligned,
On the outer surface of the prepreg tape base material (2), a long prepreg second tape having reinforcing fibers arranged in the longitudinal direction and having a width shorter than the width of the prepreg tape base material (2) is provided.
The tape auxiliary material (4) is aligned in its longitudinal direction, and the prepreg first tape auxiliary material (3) is
A tape for forming a tubular body (5) is formed by superimposing them in a position displaced in the width direction from the superposition position of the tape for forming a tubular body (5), and the first tape auxiliary material made of prepreg (3) and the prepreg tape base material (2) are stacked together, and the prepreg tape base material (2) is overlapped with the
Tape auxiliary material (4) and the prepreg tape base material (2)
) and the second polymerized portion (B) is formed by overlapping the tape (5) for forming a tubular body with respect to the mandrel (6).
When winding the tubular body, the width direction of the tubular body forming tape (5) is inclined at a certain angle with respect to the axial direction of the mandrel (6), and the tubular body is wound in advance. The second polymerized portion (B) is superimposed on the first polymerized portion (A) of the forming tape (5), and the mandrel (6) is
A method for producing a tubular body, which involves winding the tape (5) for forming a tubular body around the body and baking the tape to form the tubular body. 3. A long prepreg tape base material (2
), a long prepreg tape auxiliary material (3) whose width is shorter than the width of the prepreg tape base material (2), in which reinforcing fibers are aligned in a direction perpendicular to the one direction;
A tubular body is formed by winding tapes (5) for forming a tubular body, which are formed by overlapping each other with their longitudinal directions aligned, so that a portion of the tape in the width direction overlaps.