JPH07107225B2 - Bias cloth manufacturing method and apparatus - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for spirally cutting a tubular cloth to manufacture an elongated bias cloth.

FRP molded products of various shapes are used as structural materials for aircraft and the like, and as a reinforcing material for these FRP molded products,
Bias cloth such as carbon fiber or glass fiber is used.

When these bias cloths are continuously manufactured, a tubular cloth is woven from carbon fibers or the like, and the cylindrical cloth is cut into a spiral shape to obtain a long bias cloth.

Conventional technology As a manufacturing technology for this type of bias cloth, a Japanese bar is covered with a tubular cloth, and while diagonally incising it with a cutter,
Bias cloth is continuously manufactured by pulling out the cut bias cloth diagonally.

Further, as described in JP-A-52-85597, three rolls that are twisted with respect to each other are covered with a tubular cloth, and the rolls are rotated to rotate the tubular cloth for a long length. It is also known to make a bias cloth by feeding it in a direction and cutting it with a cutter.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in these techniques, since the tubular cloth has a movement in the circumferential direction, continuous incision cannot be performed while weaving the tubular cloth. Must be inventoried once and supplied to Bias Cut.

Therefore, it is necessary to wind the tubular cloth, which has been woven once, into a coil or fold it in a zigzag and store it, and transfer it to the cutting step again. However, when it is wound or folded in this way, the tubular cloth is flatly folded and strongly pressed, and at the folding ears, the tubular cloth is bent at a sharp angle and the texture is displaced.

Also, when trying to obtain a bias cloth such as carbon fiber as described above, if a tubular cloth woven of carbon fiber etc. is flatly folded, the weft thread is strongly bent at the fold and is cut. Often damaged.

Further, in the method of covering two bars with the tubular cloth in the conventional method and incising while pulling out the bars diagonally, the tubular cloth is pulled obliquely, so that misalignment is likely to occur. Further, in the method of covering three rolls and cutting them while rotating them, the tubular cloth is twisted by each roll, so that misalignment easily occurs.

As described above, in the method of the conventional example, misalignment is likely to occur in the tubular cloth, and even if this is spirally cut,
Unable to get high quality bias cloth.

Therefore, in order to obtain a high-quality bias cloth, the woven tubular cloth is directly supplied to the cutting device, the tubular cloth is held in a cylindrical shape, and the length direction and the circumferential direction are accurately set. However, it is desirable that the tubular cloth be spirally incised while the tubular cloth is moved in the lengthwise direction while maintaining this state. If the weave of the tubular cloth is deviated, even if the tubular cloth is cut at the correct angle, the size of the bias cloth is distorted or the weave is distorted, and a high-quality bias cloth cannot be obtained.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method and an apparatus for producing a high-quality carbon fiber bias cloth having a uniform weave and no defects and an accurate bias angle. To do.

Means for Solving the Problems Thus, the invention of the method in the present application is such that a cutter and a take-up device are attached to the core while advancing a tubular cloth held in a cylindrical shape in the core in the length direction of the core. The invention is characterized in that the device is rotated around a center, and the tubular cloth is spirally incised by the cutter, and the incised bias cloth is taken by the take-off device. Core, a feeding device for advancing a tubular cloth covering the core in the length direction of the core, a revolving frame that revolves around the core around the core, and a cutter attached to the revolving frame. And a take-off device,
The feature is that the operations of the feeding device and the swing frame are interlocked.

The present invention will be described below with reference to the drawings. The drawings show the device of the invention. The core 1 is erected in the center,
A swivel frame 2 is provided below the core 1 so as to swivel around the core 1.

The core 1 is fixedly erected on the floor surface, and a groove 3 is formed on the outer circumference of the upper part thereof. In addition, the concave groove 3
A plurality of rolling wheels 4 are rotatably mounted radially inside the core 1 above, and the peripheral surface of the rolling wheels 4 is slightly exposed to the outer peripheral surface of the core 1.

The previous turning frame 2 is rotatably supported on the rotary leg 5, and its turning center coincides with the central axis of the core 1. A bias cloth take-up device 6 is mounted on one end of the revolving frame 2, and a control box 7 is mounted on the other end.

Reference numeral 8 denotes a cutter, which is attached to an upper end portion of a support rod 9 provided upright on the swivel frame 2. Cutter 8
A disk-shaped rotary blade 10 is attached to the tip of. The rotary blade 10 coincides with the position of the concave groove 3 of the core 1, and the outer circumference of the rotary blade 10 slightly bites into the concave groove 3. As the swivel frame 2 swivels, the cutter 8 swivels along the outer circumference of the concave groove 3.

Next, 11 is a feeder. The feeding device 11 is provided above the cutter 8 and has a plurality of rollers 12 arranged radially outside the core 1, and these rollers 12 face the rolling wheels 4, respectively. It is arranged.
Each roller 12 is driven to rotate by a motor 13, and the air cylinder 14 is used to rotate the core 1
It is slidable in the direction of moving in and out of.

The rotation speed of each roller 12 in this feeder 11 is the same, and there is almost no play in the drive. Further, the rotation of the roller 12 and the turning of the turning frame 2 are interlocked with each other so that they are started and stopped at the same time, and their speeds are synchronized. This tuning is performed by, for example, picking up a pulse from a motor 13 that rotates the roller 12 by an encoder and controlling a stepping motor that swivels the swivel frame 2 based on this by a microcomputer.

Operation The operation of this device will be described below. The tubular cloth 19 is woven by an annular loom (not shown) and directly supplied to the apparatus of the present invention. The tubular cloth 19 is supplied from the upper end of the core 1 and covers the core 1. Then, it is expanded into a cylindrical shape by the core 1,
It moves downwards along the outer surface of the core 1 passing between the wheel 4 and the roller 12. Then, the bias cloth 20 obtained by cutting the tubular cloth 19 by cutting with the rotary blade 10 of the cutter 8 while moving downward is taken up by the take-up device 6 and wound up.

First, when the apparatus of the present invention is stopped, the tubular cloth 19 is constituted by an annular loom, and is slightly accumulated between the annular loom and the core 1. When the tubular cloth 19 is accumulated to some extent, the device of the present invention starts to operate.

In operation, first, the roller 12 of the feeding device 11 rotates to feed the tubular cloth 19 downward. Roller with air cylinder 14
The roller 13 is rotated by the motor 13 while pressing the roller 12 against the roller 4, and the tubular cloth 19 is fed downward. At this time, the rolling wheels 4 are also pressed against the tubular cloth 19 to rotate.

Thus, while the tubular cloth 19 is fed downward along the core 1, the swivel frame 2 swivels and the rotary blade 10 of the cutter 8 swivels around the core 1 to incline the tubular cloth 19 obliquely. .

At this time, the bias angle of the obtained bias cloth 20 can be changed by adjusting the feeding speed of the tubular cloth 19 by the roller 12 and the turning speed of the turning frame 2 as described above. For example, a bias cloth having a bias angle of 45 degrees can be obtained by making the feed speed of the tubular cloth 19 by the roller 12 equal to the rotational peripheral speed of the rotary blade 10.

The obtained bias cloth 20 is taken up by the take-up device 6 which turns together with the turning frame 2 and wound into a coil.

When all the accumulated tubular cloth 19 has been supplied to the apparatus, the apparatus stops and accumulates the woven tubular cloth 19 again.

EFFECTS OF THE INVENTION According to the present invention, since it is possible to directly feed the tubular cloth 19 configured by the annular loom to the device and make a spiral incision, it is not necessary to fold the tubular cloth 19 flatly, and the folding is possible. I have no ears. Therefore, in this case, the tubular cloth 19 made of carbon fiber or the like as described above is used.
Even when making an incision, there is no misalignment or damage to the yarn at the folded ear.

Further, according to the present invention, while the tubular cloth 19 advances along the outer periphery of the core 1 in the length direction thereof, the cutter 8 swivels and incises the periphery thereof, so that the tubular cloth 19 is twisted or slanted. Therefore, the warp thread and the weft thread are incised with the warp thread and the weft thread accurately extending in the length direction and the circumferential direction. Therefore, there is no misalignment, wrinkling, or cloth deviation as in the conventional example, and there is no uneven width of the bias cloth or distortion of the fiber arrangement, and a high-quality bias cloth can always be obtained.

The device and the device of the present invention, the tubular cloth 19 woven by the annular loom as described above is directly supplied, and the bias cloth is incised.
It is suitable for obtaining 20 but is not limited thereto, and it is needless to say that the present invention can be applied to a case where a tubular cloth woven in another step is cut to obtain the bias cloth 20.

[Brief description of drawings]

1 is a front view of the apparatus of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 1 ... Core, 2 ... Revolving frame 6 ... Take-off device, 8 ... Cutter 11 ... Feeding device, 19 ... Cylindrical cloth 20 ... Bias cloth

Claims (2)

[Claims] 1. A cutter (8) and a take-up device (6) while advancing a tubular cloth (19) held in a cylindrical shape by a core (1) in the longitudinal direction of the core (1). Is rotated about the core, the tubular cloth (19) is spirally cut by the cutter (8), and the cut bias cloth (20) is taken by the take-up device (6). A method for manufacturing a bias cloth, characterized by 2. A cylindrical core (1), a feeding device (11) for advancing a tubular cloth (19) covering the core (1) in the longitudinal direction of the core (1), and the core. A revolving frame (2) revolving around the core (1) around (1),
A cutter (8) and a take-up device (6) attached to the revolving frame (2), and the operation of the feeding device (11) and the revolving frame (2) are interlocked with each other. Bias cloth manufacturing equipment