KR20000007330A - Reduction and prevention method of fiber damage wound on spool - Google Patents

Abstract

PURPOSE: A method is provided to reduce and prevent the damage of a fiber wound on a spool by whipping the end of a loose fiber. CONSTITUTION: A method comprises the steps of:winding a fiber on a rotary spool surrounded by a non-round guard; whipping the frayed end of the fiber by leaning on the inlet surface of the guard while the spool rotates; and keeping the frayed end of the fiber to be separated from the fiber wound on the spool by keeping the end of the fiber.

Description

Method to reduce or prevent damage to the fiber wound on the spool

The present invention relates to a method for whipping a loose end of a fiber onto a fiber already wound on a spool to prevent damage to the fiber, such as an optical fiber wound on a rotating spool.

In the optical fiber or plastic filament manufacturing industry, long length fibers or filaments are wound at high speed in a machine rotated take-up spool for conveying or handling. When the fiber is wound on the spool, the fiber is laminated to the spool in a continuous layer. In the optical fiber industry, spooling of fibers takes place in two common locations: a draw tower where the fibers are basically drawn and an off-line screening station where the fibers are tested. In each of these locations, the fiber is wound at a speed of 20 meters per second to maintain a relatively high tension.

During this winding step, the fiber may break due to the force applied by the machine. When the fiber breaks, the loose fiber end of the fiber tends to wind at high speed due to the rapidly rotating spool. The ends of the uncontrolled loose fibers are wound against the fibers already wound on the spool, damaging many fibers on the order of five to six layers. In the fiber optic industry, this can be attributed to damage to the fiber of approximately 500 meters. This failure is unpredictable, requiring the machine to be stopped halfway to prevent fiber whip damage. However, since such breakage is not expected and time is required to stop the spool, the spool continues to rotate so that the end of the fiber leans over the fiber already wound on the spool, causing damage to the fiber. The cycle of time is inevitable.

Ideally, if the spool is stopped in free space, there will be no whip damage since the loose end of the fiber does not hit an obstacle or rebound towards the fiber spool. In most cases, however, the manufacturer has a guard installed for safety reasons. In most winding operations, the web of the winding machine consists of a rectangular box around the spool, or a deflector plate mounted parallel to the spool. The purpose of these nets is to prevent the fibers from winding towards the worker when the fibers are broken. However, this type of mesh has increased the likelihood of fiber ends striking the bundle of fibers. Some type of curved surface in the net causes the loose end of the fiber to hit the edge of the net so that the fiber rebounds to the spool.

In addition, there must be an opening in the net so that the fiber can be wound on the spool. Some type of trim will produce a bent edge that alternately performs the whip action described above at the fiber end. Moreover, a fully round net does not provide the surface configuration necessary to capture and retain the ends of the fibers away from the spool.

The present invention is directed to a novel method for reducing or preventing damage to fibers wound on a spool to overcome one or more of the aforementioned problems associated with fiber winding. The present invention relates to a novel method of reducing or preventing damage to a fiber wound on a spool by performing a whip of loose fiber ends against a fiber already wound on a spool.

The main advantage of the present invention is the preparation of an arrangement which can substantially avoid one or more limitations and disadvantages of conventional arrangements. By holding the loose end of the fiber against the smooth surface of the net that substantially surrounds the spool while the spool is rotating, the whip damage of the fiber in the spool is substantially reduced or completely prevented.

Additional features and advantages of the invention will be set forth in the description which follows, and will be obvious, and examples of the invention will be seen. The objects and other advantages of the present invention will be seen and obtained by the process pointed out in detail in the written description and claims, as well as the appended drawings.

In order to achieve the above and other advantages, and in accordance with the purpose of the present invention, in particular and broadly, the present invention relates to a rotating, substantially enclosed by a non-circular net having a smooth, continuous inner surface in contact with the spool. Winding the fiber onto the spool;

Capturing the loose ends of the fibers at the inlet surface of the mesh while the spool is rotating; And retaining the loose ends of the fibers from the fibers already wound on the spool by holding the loose ends of the fiber against the mesh inner surface while the spool is rotating to reduce or prevent damage to the fibers wound onto the spool. Way.

The present invention also includes maintaining the fiber relative to the inner surface of the net through various degrees of rotation of the spool. The loose end of the fiber can be held leaning against the inner surface of the net after the end of the fiber has entered the inlet surface of the net while the spool rotates at least 90 °, 180 °, or 270 ° to less than 360 °. have.

The foregoing general description and the following detailed description will provide further explanation of the invention, which is preferred, illustrative, and claimed.

The accompanying drawings illustrate embodiments of the invention, together with the description for clarity of the invention, and of which part is a part of the specification, illustrating the principles of the invention.

1 is a cross-sectional view of a conventional fiber winding apparatus,

2 is a cross-sectional view of a conventional fiber winding apparatus showing the whip operation of a broken fiber end;

3 is a cross-sectional view of one embodiment of a network according to the invention,

4-9 are cross-sectional views of the mesh shown in FIG. 3 showing sequential paths of loose fiber ends around the mesh.

1 shows a conventional apparatus for winding fibers. The fibers 1 are wound on the spool 2 at a relatively high speed, for example 30 m / s. The spool 2 rests on the bearing 3. The fibers 1 are kept under relatively high tension in order to be properly wound onto the spool 2. If the fiber is an optical fiber, it will be fed directly to a known drawing device (not shown) or a known screening device (not shown).

Ideally, if the reel stops in free space, there would be no reason to install any type of shield or net around the reel. However, as shown in Fig. 1, a net 4 is provided behind the spool 2 in order to prevent injury of the worker standing around the spool when the fiber is broken. In particular, if the fiber 1 is broken, the ends of the loose fiber will be wound behind the net 4.

However, as shown in FIG. 2, some type of corner or corner is wound around the edge of the fiber end or end of the fiber bundle, and the fiber bundle can be caught by the fiber as shown by reference number 5. Will rewind. In order to avoid damaging the fibers caused by whipping, the ends of the fibers can be included and captured on a smooth surface around the spool. Surrounding the spool with a cylinder may cause the fiber end to be separated from the fiber bundle by centrifugal force by the rotating spool. However, there must be an inlet for the fiber to enter the cylinder. As mentioned above, any type of tape will provide a sure whip source of the fiber. Therefore, the fiber must enter the spool during the winding operation. A cylinder that is completely round around the shipping pool will not prevent the whipping of the fibers from damaging the fiber bundles.

Reference will now be made in detail to preferred embodiments of the invention, which are illustrated in the accompanying drawings. Preferred embodiments of the invention are shown in FIG. 3 and are generally designated by reference numeral 10.

As mentioned above, the present invention relates to a method for reducing or preventing damage to a fiber wound on a spool comprising several steps. As shown in Figure 3, the net 10 according to the present invention adjusts the fiber ends in two stages after the fiber is broken. The first step is to introduce the end of the fiber towards the fiber bundle after the fiber breaks. When the fiber breaks, the end of the fiber is bound around the pulley of the drawing or screening device and has a direct high speed path to the spool that causes damage to the fiber. The second step is to keep spinning the fiber around the spool of fiber. The ends of the rotating fiber can adversely affect the surface and can be rebound to the fiber spool with sufficient energy to cause fiber damage. Maximum separation between the fiber tip and the spool is necessary to prevent damage to the fiber bundles.

The first step of the invention is to wind the fibers into a rotating spool substantially enclosed by the non-circular net 10. The web 10 preferably has a smooth, continuous inner surface in contact with the spool. This smooth surface can prevent the rebound of the fiber to the fiber bundle.

4 shows the fiber path protruding after the fiber breaks. Because of the high tension of the fiber and the direction of spool rotation, the fiber will wind directly into the spool area when the fiber breaks. In order to prevent the loose ends of the fibers from striking the fibers already wound on the spool 2, the arch section, A1, affects the ends of the fibers on the right side of the guard mounting arm 6. Is located to give. Arch A1 is defined as the mesh entrance surface.

In order to prevent damage of the fiber bundles by loose ends of the fibers 1, the next step of the invention is to capture the loose ends of the fibers 1 at the inlet surface of the net 10 while the spool is rotating. 5 shows loose ends captured at the inner inlet formed by arch A1. The capture of the loose end of the fiber 1 results in a smooth arch surface in a position where the loose end of the fiber 1 reaches the spool 2 and initially affects the surface of the web 10 before attacking the fiber bundle. Is achieved by providing Capture is achieved by the arching of the inlet surfaces A1 and A2 with centrifugal forces affecting the ends of the fibers by rotation of the spool 2.

In order to ensure that the loose end of the fiber 1 is not rebound and does not affect the fiber bundle, the last step of the present invention is to hold the fiber end against the inner surface of the net 10 while the spool is rotating, It is to separate the loose end of the fiber from the fiber already wound. Preferably, the ends of the fibers are held against the inner surface of the net 10 while the spool is rotated 90 degrees and more preferably 180 degrees and most preferably 270 degrees.

As shown in FIGS. 3 and 4, the shape of the net 10 is non-circular in order to keep the fibers leaning against the net 10 during the rotation of the spool. In order to optimize the control of the loose ends of the broken fibers 1, the net 10 is preferably composed of several arches.

Each arch has a different radius of R1 to R7. The radius is subtracted from the center of the spool in order to maximize the total amount of the surface of the net 10 in which the fibers are held. Depending on the size of the spool and the net, the position of the subtracted point changes.

6 and 7 show a continuous smooth inner mesh surface, defined by arches A3-A7 coupled by centrifugal force by rotation of the spool 2, to maintain the loose ends of the fibers 1 leaning against the inner mesh surface. Is shown. In other words, the centrifugal force affecting the fiber ends by the rotation of the arched spool 2 of the net 10 causes the fiber ends to be pulled along the surface of the net 10 with minimal rebound results. Thus, the ends of the fibers are held against the net. Since the inner mesh surface is opened at the bent surface, there is no whip result given at the fiber end, and the fiber path follows the inner mesh surface.

8 and 9 show the path of the fiber along the last portion of the net 10 before the fiber reaches the inlet of the net. The last part 11 is substantially the straight part of the net. It is positioned to face the end of the fiber toward the spool before releasing the end of the fiber toward the inlet of the net. This redirection of the fiber path causes the fiber to exit the surface of the net at the corners. As the spool 2 rotates, the loose end of the fiber 1 is initially loosened towards the spool and then injected directly toward the inlet surface of the mesh formed of the arch A1. This fiber path ensures that the loose fiber ends do not wind against the web mounting arm 6 and do not rebound into the fiber bundles. The loose fiber ends also have a similar path shown in FIGS. 4 and 5 to prevent whip damage of the fibers in the spool 2.

Although the present invention has been described in detail for the purpose of the present invention, the above detailed description is not limited to the above object, and those skilled in the art can variously change the present invention without departing from the object of the present invention as defined in the following claims.

The fiber winding according to the present invention can solve the problems of the conventional winding device, and can reduce or prevent damage to the fiber wound on the spool.

Claims (6)

Winding the fiber onto a rotating spool substantially surrounded by a non-circular net having a smooth continuous inner surface in contact with the spool; While the spool is rotating, leaning against the inlet surface of the net to capture the loose ends of the fibers; Retaining the ends of the fibers against the inner surface of the mesh while the spool is rotating, thereby reducing the damage of the fibers wound to the spool, which comprises separating the loose ends of the fibers from the fibers already wound on the spool. Or how to avoid it. 2. The loose end of the fiber is held against the inner surface of the net after the loose end of the fiber is captured at the inlet surface of the spool while the spool is rotated at least 90 °. A method for reducing or preventing damage to fibers wound on a spool. 2. The loose end of the fiber is held against the inner surface of the net after the loose end of the fiber is captured at the inlet surface of the spool while the spool is rotated at least 180 °. A method for reducing or preventing damage to fibers wound on a spool. 2. The loose end of the fiber is held against the inner surface of the net after the loose end of the fiber is captured at the inlet surface of the spool while the spool is rotated at least 270 °. A method for reducing or preventing damage to fibers wound on a spool. 2. The unwinded end of the fiber is held against the inner surface of the net after the unwinded end of the fiber is captured at the inlet surface of the spool while the spool rotates from at least 270 ° to less than 360 °. A method for reducing or preventing damage to a fiber wound on a spool. 6. The fiber wound on a spool of claim 1, 2, 3, 4 or 5 wherein the inner surface of the mesh comprises a substantially straight end adapted to direct the path of the loose end of the fiber to the spool. To reduce or prevent damage.