JPH11245309A - Braider for manufacture of hollow container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compose a fraiding layer under a state wherein a fiber bundle is always tightly joined onto a liner by accurately controlling a combining angle of the fiber bundle for which a braiding is performed, in response to a change of the shape of a liner for the manufacture of a hollow container. SOLUTION: A large number of fiber bundles 19 and guided to a composing point on a liner 2, from a bobbin carrier 7 through an annular guide 20b (20a), and are made to mingle with each other and turned around the liner. A second guide 21b (21a) is arranged between the annular guide and the liner. The second guide makes the fiber bundles which are composed by changing the size of an opening in response to the shape of the liner, onto the liner under a state wherein the vicinity of the edge of the opening is in contact with the surface of the liner or the surface of a fraiding layer 22 on the liner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method in which a large number of fiber bundles are passed between a bobbin carrier and a liner for making hollow containers, and are swirled around the liner while being guided to a composition point on the liner through an annular guide. And a braider for forming a braiding layer on a liner.

[0002]

2. Description of the Related Art According to a conventional method of manufacturing a fiber-reinforced hollow container using a blader, particularly a fiber-reinforced pressure container, a pressure container liner having a shape corresponding to the fiber-reinforced pressure container to be manufactured is prepared in advance. Is used, a large number of fiber bundles are passed between the bobbin carrier and the pressure vessel liner, and are swirled around the liner while being guided to the composition points on the liner through the annular guide, and are braided on the liner. The layers are composed.
At this time, the set angle of the fiber bundle in the braiding layer is controlled by the annular guide, and a stable composition of the braiding layer on the pressure vessel liner is realized. Thereafter, after the resin is impregnated into the braiding layer, the resin is cured to produce a fiber-reinforced pressure vessel. In this case, the fiber-reinforced pressure vessel to be manufactured usually includes a cylinder portion and dome portions connected to both ends of the cylinder portion, and the pressure vessel liner also has a shape corresponding to this.

[0003] By the way, in a conventional blader,
The annular guide has a constant size and shape, and when blading is performed using the annular guide, the pressure vessel liner changes abruptly in cross section (diameter) along the axial direction at the dome portion. A gap is formed between the pressure vessel and the braiding layer formed thereon, and the pressure resistance of the manufactured pressure vessel is significantly reduced.

[0004] In order to avoid this, it is conceivable to make the annular guide so that its opening can be changed according to the change in the shape of the pressure vessel liner, and to make the distance between the annular guide and the pressure vessel liner as small as possible. However, also in this case, it is not possible to cope with a sudden change in the cross-sectional shape along the axial direction of the dome portion of the pressure vessel liner, and a gap is generated between the pressure vessel liner and the braiding layer.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to precisely control the angle of a fiber bundle braided in response to a change in the shape of a liner for producing a hollow container.
An object of the present invention is to provide a blade for fabricating a hollow container capable of forming a braiding layer while keeping a fiber bundle in close contact with a liner.

[0006]

In order to solve the above-mentioned problems, the present invention is to pass a large number of fiber bundles between a bobbin carrier and a liner for producing a hollow container, and to reach a composition point on the liner through an annular guide. In a braider configured to be swiveled around the liner while guiding, the fiber bundle is formed between the liner and the annular guide by changing the size of the opening according to a change in the shape of the liner. A blader is provided with a second guide for making close contact with the liner.

In this configuration, preferably, the second
The guide is arranged such that the center of the opening is aligned with the axis of the liner, and the edge of the opening is close to or in contact with the surface of the liner or the surface of the braiding layer formed on the liner. Are arranged so as to change the size.

More preferably, the second guide comprises a pair of wire take-up / feed-out rollers spaced apart from each other, a wire formed between the rollers to form a loop in the middle, and a wire forming the loop. Placed at the intersection of the wires to be maintained, while maintaining the intersection of the wires,
The liner comprises a loop holding / moving member that can reciprocate in the radial direction of the liner when the diameter of the loop changes.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described. FIG. 1 is a schematic plan view of a blade for fabricating a hollow container according to an embodiment of the present invention as viewed from above, and FIG. 2 is a schematic perspective view of the blade of FIG. FIG. 3 is a schematic cross-sectional view along the axial direction of a hollow container showing a configuration near a fiber bundle path from a bobbin carrier to a fiber bundle composition point in the blader of FIG.

In FIGS. 1 and 2, 1 is a blader, 2 is a liner for producing a hollow container, and 3 is a moving device of the liner 2. The liner 2 is for ensuring the airtightness of the hollow container by the blader 1. The liner 2 includes a cylinder portion 2a and a dome portion 2b connected to both ends of the cylinder portion 2a. The braider 1 has a raceway surface 4 in the shape of a cylinder or a sphere, and the center of the braider 1 is hollow because the liner 2 penetrates during composition. Track surface 4 separately
Of course, it is also possible to use a braider of a type in which is formed in a plane. Two intersecting groove-shaped annular orbits 5 and 6 are formed on the orbital surface 4 of the blader 1.
A large number of bobbin carriers 7 are guided in the groove 6 and run crosswise in the opposite direction along each of the tracks 5 and 6. In addition, the center fiber bundle (a fiber bundle that runs straight in the composition direction) at the center surrounded by the two annular orbits 5 and 6
The hole 8 for supplying the gas is formed.

The moving device 3 supports a first chuck 9 for holding one end of the liner 2, and holds a driving table 11 connected to a timing belt 10 for holding the other end of the liner 2. It comprises a driven table 14 that supports the second chuck 12 and runs on a rail 13, and a connecting rod 15 that connects the driving table 11 and the driven table 14. FIG.
Reference numeral 16 denotes a pulse motor for driving the drive gear 17, and reference numeral 18 denotes an encoder for controlling the rotation of the pulse motor 16.

Then, the bobbin carrier 7 has the annular orbit 5,
6, the position of the liner 2 is controlled by the moving device 3, whereby a large number of fiber bundles 19 passed between the bobbin carrier 7 and the liner 2 are swirled around the liner 2, If necessary, the fiber bundle at the center from the hole 8 is entangled with the fiber bundle 19 that is unwound and assembled from the bobbin carrier 7 traveling along the track, so that the braiding is performed and the braid is formed on the liner 2. The coating layer 22 is composed.

As shown in FIGS. 1 and 3, the cavity of the blader 1 has a composition direction of the braiding layer (FIG. 2).
(See arrow A), a pair of annular guides 20a, 20b which are located forward of the turning surface of the fiber bundle 19 and which can be passed by the liner 2 are arranged at intervals and fixed to the blade 1 by appropriate means (not shown). Have been. The pair of annular guides 20a and 20b can change the size of the opening, guide the fiber bundle 19 fed from the bobbin carrier 7 to the composition point, and stabilize the braiding layer 22 on the liner 2. It achieves the composition. Details of the configuration of the annular guides 20a and 20b will be described later.

Further, as shown in FIG. 3, each of the annular guides 20a and 20b is provided outside the pair of annular guides 20a and 20b.
a, 20b and the liner 2 between the second guides 21a,
1b is arranged and fixed to the blader 1 by a suitable means (not shown). Second guides 21a, 21b
A second guide is provided for bringing the fiber bundle 19 into close contact with the liner 2 by changing the size of the opening in accordance with the shape of the liner 2, and is fixed to the blader 1 by a suitable member (not shown). Second guide 21
Details of the configurations of a and 21b will be described later.

FIGS. 4 and 5 show the annular guides 20a, 20a.
5B is a front view showing an example of the configuration of FIG. 4B. In FIG. 4, the annular guides 20 a and 20 b are in a state where the inner peripheral edges are narrowed to a minimum, and in FIG. It is in the state that was done. In addition, a pair of annular guides 2
Since 0a and 20b have the same configuration, FIGS. 4 and 5 show only one annular guide 20b.

As shown in FIGS. 4 and 5, the annular guide 20b includes an installation frame 31 that is stationary with respect to the blader 1, a rotating frame 32 rotatably supported by the installation frame 31, and a shaft. A link 34 pivotally attached at one end to the rotating frame 32 by 33
And an intermediate portion is rotatably attached to the installation frame 31 by a fulcrum shaft 35, and one end of the link 3 is
Guide blade 3 rotatably attached to the other end of 4
7, a motor 38 for rotating the rotating frame 32, and an encoder 39 for controlling the rotation angle of the motor 38.

The installation frame 31 is disposed at the center of the central hollow portion of the blader 1 and has a hole 31a having an inside diameter larger than the maximum diameter of the liner 2 (a circle having a large diameter indicated by a dotted line in FIG. 4). doing. The rotating frame 32 has a hole with a larger inside diameter that is concentric with the hole 31a of the installation frame 31, and is formed with a forked portion 32a that engages with an eccentric roller 41 of a motor 38 described later. The center of rotation of the rotating frame 32 coincides with the center of the hole 31a.

The guide blade 37 is mounted on the installation frame 31.
An appropriate number is provided at equal intervals around the hole 31a.
The guide blade 37 forms an inner peripheral edge of the annular guide 20b. The motor 38 is fixed on the upper part of the installation frame 31, and a pulley 40 is fixed to the motor shaft 38a. An eccentric roller 41 is rotatably mounted on a side surface of the pulley 40 at a position away from the motor shaft 38a. The motor 38 and the encoder 39 are
They are connected by an endless timing belt 42.

Then, upon receiving a signal from the encoder 39, the motor 38 rotates at an angle corresponding to the outer diameter of the liner 2,
When the pulley 40 rotates, the eccentric roller 41 rotates the motor shaft 3.
While rotating around 8a, the rotating frame 32 rotates about the center of the hole 31a of the installation frame 31 as the center of rotation. That is, the rotating frame 32 is mounted on the installation frame 31.
One end of the guide blade 37 supported by the installation frame 31 is angularly moved relative to the rotation frame 3.
2 is pivoted about a fulcrum shaft 35 by being pulled or pushed by a link 34 attached to 2. As a result, the diameter of the inner peripheral edge of the annular guide 20a expands or contracts,
The size of the opening a changes according to the change in the diameter of the liner 2.

FIG. 6 is a perspective view showing an example of the configuration of the second guides 21a and 21b. The second guide 21a,
21b have the same configuration, and FIG. 6 shows only one second guide 21b. As shown in FIG. 6, the second guide 21b includes a pair of wire winding / feeding-out rollers 23a, 23 arranged at an interval.
b, and a wire 25 stretched between the rollers 23a and 23b and forming a loop 24 in the middle. In this case, the rollers 23a and 23b are supported by a frame of the blader 1 by a suitable member (not shown), and the movement of the liner 2 during the braiding and the annular guide 2
0b is not disturbed. In this example, the opening of the loop 24 forms the opening of the second guide 21b.

The second guide 21b further includes a loop 24
Are arranged at the intersections of the wires 25 forming the cross section, and while maintaining the crossing state of the wires 25, the liner 2 can reciprocate in the radial direction of the liner 2 when the diameter of the loop 24 changes (FIG. 6).
(See arrow C).) The loop holding / moving member 26 is provided. The loop holding / moving member 26 also includes the rollers 23a, 23
Similarly to b, it is attached to the frame of the braider 1 by a suitable member (not shown) so as not to hinder the movement of the liner 2 and the movement of the annular guide 20b during braiding.

Further, as shown in FIG. 3, the loop 24 has its center coincident with the axis of the liner 2 and its edge is formed on the surface of the liner 2 or the surface of the braiding layer 22 formed on the liner 2. Are arranged so as to be close to or in contact with.

The roller 23 of the second guide 21b
When the wire 25 is unreeled from the a and 23b, the loop holding / moving member 26 simultaneously moves outward in the radial direction of the liner 2, thereby increasing the opening of the loop 24. However, the wire 25 is wound by the rollers 23a and 23b. When taken, at the same time, the loop holding and moving member 26 moves radially inward of the liner 2 so that the loop 2
The opening 4 is made smaller.

In this embodiment, the loop holding / moving member 26 is arranged only at the intersection of the wire 25 on the lower side of the loop, but the loop holding / moving member 26 is additionally provided on the upper side of the loop. Loop 24 by placing
Can also increase the shape retention power.

Further, instead of the second guide shown in FIG. 6, the annular guide shown in FIGS. 4 and 5 can be used as the second guide.

Next, a method of operating the blader 1 according to the present invention will be described. The operation of the blader 1 and the moving device 3 causes the bobbin carrier 6 to move the orbit 4,
5, the liner 2 moves with respect to the blader 1 at the same time. A large number of fiber bundles 19 passed between the bobbin carrier 7 and the liner 2 are
0a, 20b and the second guides 21a, 21b, interlaced and swirled around the liner 2, and if necessary, the central fiber bundle is entangled with the fiber bundle 19 unwound from the bobbin carrier 7 and assembled from the bobbin carrier 7. Thereby, the braiding is performed, and the braiding layer 22 is formed on the liner 2.
Is composed.

The operation of the annular guides 20a and 20b and the second guides 21a and 21b during the braiding will be described with reference to FIG. FIG. 3 shows a state in which the liner 2 is braiding toward the center of the dome portion 2b while being retracted from the braider 1 by the moving device 3 (see the arrow B in FIG. 3). In this case, the right annular guide 20b and the second guide 21b in FIG. 3 are used.

As is apparent from FIG. 3, the diameter of the liner 2 at the dome portion 2b of the liner 2 decreases rapidly along the axial direction of the liner 2. Then, as the braiding is performed toward the center of the dome portion 2b, the opening of the annular guide 20b and the loop 2 of the second guide 21b are increased.
The opening of No. 4 becomes smaller gradually. At this time, the annular guide 2
0b is a composition point, and the fiber bundle 19 is precisely controlled in composition by the change in the size of the opening of the annular guide 20b, and the composed fiber bundle 19 is close to the surface of the braiding layer 22. Alternatively, it is brought into close contact with the liner 2 by the loop 24 of the second guide 21b arranged in contact.

That is, according to the blader 1, the annular guides 20a and 20a correspond to changes in the shape of the liner.
b and the openings of the second guides 21a and 21b are changed, so that the fiber bundle 19 to be braided is changed.
Can be brought into close contact with the liner 2 while controlling its angle. As a result, in a state where the fiber bundle 19 is in close contact with the liner 2 along the shape of the liner 2, the braiding layer 22 is
And no gap is formed between the liner 2 and the braiding layer 22.

Then, after the braiding layer 9 is impregnated with the resin, the resin is cured and a hollow container is manufactured. In addition, in order to shorten the manufacturing time of the hollow container, in this embodiment, the bobbin carrier 7 and the pair of annular guides 20a,
20b, for example, a resin injection device or the like is disposed to impregnate the resin into the fiber bundle 19 traveling from the bobbin carrier 7 to the annular guides 20a, 20b. For example, it is also possible to arrange a hot air injection device or the like so that the resin is cured immediately after the composition of the fiber bundle impregnated with the resin.

Thus, since there is no gap between the liner 2 and the braiding layer 22 formed thereon, the manufactured hollow container has a sufficient pressure resistance for practical use.

[0032]

As described above, according to the present invention, the set angle of the fiber bundle to be braided is precisely controlled according to the change in the shape of the liner for producing a hollow container, and the fiber bundle is placed on the liner. By forming the braiding layer in a state of being always in close contact, a gap can be prevented from being formed between the liner and the braiding layer. As a result, it is possible to prevent a reduction in pressure resistance of the manufactured pressure vessel.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a braider for manufacturing a hollow container according to one embodiment of the present invention as viewed from above.

FIG. 2 is a schematic perspective view of the blader of FIG. 1;

3 is a schematic cross-sectional view along the axial direction of a hollow container showing a configuration near a fiber bundle path from a bobbin carrier to a fiber bundle composition point in the blader of FIG. 1;

FIG. 4 is a front view showing a configuration of an example of an annular guide;
This shows a state where the inner peripheral edge of the annular guide is narrowed to the minimum.

FIG. 5 is a front view showing a configuration of an example of an annular guide;
5 shows a state in which the inner peripheral edge of the annular guide is maximally expanded.

FIG. 6 is a perspective view illustrating a configuration of an example of a second guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blader 2 Hollow container production liner 2a Cylinder part 2b Dome part 3 Moving device 4 Track surface 5, 6 Annular track 7 Bobbin carrier 8 Hole 9 First chuck 11 Drive stand 12 Second chuck 14 Follower table 19 Fiber bundle 20a , 20b Annular guide 21a, 21b Second guide 22 Braiding layer 23a, 23b Wire winding / feeding roller 24 Loop 25 Wire 26 Loop holding / moving member

Claims (3)

[Claims] 1. A braider which passes a number of fiber bundles between a bobbin carrier and a liner for producing a hollow container, and crosses and turns around the liner while guiding it to a composition point on the liner through an annular guide. Wherein a second guide is provided between the liner and the annular guide for changing the size of the opening in accordance with a change in the shape of the liner to bring the fiber bundle into close contact with the liner. And a braider. 2. The second guide, wherein the center of the opening is aligned with the axis of the liner and the vicinity of the edge of the opening is close to the surface of the liner or the surface of a braiding layer formed on the liner. The blader according to claim 1, wherein the blade is arranged so as to change the size of the opening in a state where the blade is in contact with the blade. 3. The second guide comprises: a pair of wire winding / unwinding rollers arranged at intervals; a wire formed between the rollers to form a loop in the middle;
A loop holding / moving member that is arranged at a crossing position of the wire forming the loop, maintains the crossing state of the wire, and can reciprocate in the radial direction of the liner when the diameter of the loop changes. The blader according to claim 2, wherein