JP6794776B2 - Manufacturing method of glass fiber strand - Google Patents

Description

The present invention relates to a technique for manufacturing a glass fiber strand.

Conventionally, in the process of manufacturing a glass fiber strand, the strand winding body is generally manufactured by winding a glass fiber strand formed by bundling a plurality of glass fiber filaments around a collet.
Specifically, for example, a plurality of (for example, thousands) glass fiber filaments are spun by pulling the molten glass downward through a hollow nozzle (orifice) of a bushing and focusing on these spun glass fiber filaments. A glass fiber strand is formed by applying a sizing agent (binder) with an agent coating device and squeezing these glass fiber filaments coated with the sizing agent with a sizing roller.
Then, the formed glass fiber strand is wound on a collet mounted on a winding device located below the bushing while being twilled by a traverse mechanism (twilling mechanism) to form a strand winding body, and then becomes a strand winding body. Sent to the process.

By the way, in the manufacturing process of such a glass fiber strand, when the thread breakage of the glass fiber filament occurs during the spinning of the glass fiber filament, the orifice position of the bushing from which the glass fiber filament in which the thread breakage has been pulled out is pulled out. Bead-shaped glass lumps and large-diameter glass pieces are produced.
Then, when these glass lumps, glass pieces, etc. grow to a certain size, they fall from the orifice position.
After that, another glass block, glass piece, or the like is generated again at the orifice position, and when it grows to a certain size, it falls again from the orifice position.
In this way, these glass lumps, glass pieces, and the like may fall on the strand winding body during the winding operation of the glass fiber strand and adhere to the strand winding body.
Therefore, after the strand winding body to which such a glass block or a glass piece is attached is sent to the next step, the glass block or the glass piece is removed by the manual work of the operator or compressed air. It is very difficult to completely remove the glass block or glass piece once adhered from the strand winding body.

Therefore, as a measure to prevent such a glass block or a piece of glass from falling into the strand winding, for example, when a thread breakage of an arbitrary glass fiber filament occurs during spinning of the glass fiber filament, A technique is known in which the winding operation of the strand winding body is stopped immediately after detecting this by a sensor or the like (see, for example, "Patent Document 1").

Japanese Unexamined Patent Publication No. 53-41521

However, even if the winding operation of the strand winding is stopped immediately after the thread breakage of the glass fiber filament occurs, it is possible to prevent the falling glass gob or glass piece from falling into the strand winding. However, it is unavoidable that these glass lumps and glass fragments adhere to the stopped strand winding.
Therefore, these glass lumps and glass pieces are removed manually by an operator or by compressed air, but it is very difficult to completely remove the glass lumps and glass pieces once adhered from the strand winding body. Is.
Therefore, in the strand winding body, among the glass fiber strands wound on the collet, the portion wound on the outer peripheral surface side where these glass lumps and glass pieces may be attached must be removed to some extent. It had to be a factor that caused a deterioration in yield.

The present invention has been made in view of the current problems described above, and is formed in a bead shape on a strand winding body obtained by winding an already formed glass fiber strand due to the occurrence of thread breakage of the glass fiber filament. It is an object of the present invention to provide a method for producing a glass fiber strand, which can prevent the glass lumps and glass pieces having a large diameter from adhering to the glass fiber strands and can improve the yield of the glass fiber strands.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.

That is, in the method for producing a glass fiber strand according to the present invention, a plurality of glass fiber filaments formed by pulling out molten glass downward from a plurality of holes provided in the bushing are focused by a focusing device. A method for producing a glass fiber strand, in which a glass fiber strand is formed and the glass fiber strand is wound on a spindle located below the bushing to form a strand winding, and the glass fiber is produced by a detecting means. When the thread breakage of the filament is detected and the thread breakage of the glass fiber filament is detected by the detection means, the strand winding body is moved in a direction away from the position directly below the bushing.

According to the method for producing a glass fiber strand having such a structure, when a thread breakage of a glass fiber filament occurs, it is immediately detected by a detecting means, such as a bead-shaped glass block or a large-diameter glass piece. Since the strand winding body can be immediately retracted from the position where the glass falls, it is possible to prevent bead-shaped glass lumps, large-diameter glass pieces, and the like from adhering to the strand winding body. It is possible to improve the yield of fiber strands.

Further, in the method for producing a glass fiber strand according to the present invention, in the strand winding body, the glass fiber strand that could not be wound up on the spindle is rooted on the strand winding body side as the strand winding body moves. It is preferable to cut at the part.

By having such a configuration, for example, the glass fiber strands that could not be completely wound are towed and entangled by the moving strand winding body, and it is possible to prevent the occurrence of secondary troubles such as delaying the restoration work of the equipment. be able to.

Further, in the method for manufacturing a glass fiber strand according to the present invention, the movement of the strand winding body is executed by automatically operating the spindle based on the detection signal of the thread breakage of the glass fiber filament by the detection means. Is preferable.

In this way, by executing the movement of the strand winding by the automatic operation of the spindle, the strand winding is moved more quickly than, for example, by the manual operation of the operator (or the manual operation of the operator). Since the strand winding body can be retracted, it is possible to more reliably prevent bead-shaped glass lumps, large-diameter glass pieces, and the like from adhering to the strand winding body.

Further, in the method for producing a glass fiber strand according to the present invention, the spindle is provided on a turret board having a cutting means for cutting the glass fiber strand, and is formed on the spindle by rotating the turret board. The strand winding body is moved in a direction away from the position directly below the bushing, and the cutting means is configured to cut the glass fiber strand that could not be completely wound up as the strand winding body. Is preferable.

By having such a configuration, it is not necessary to separately provide a spindle moving device and a glass fiber strand cutting device, and it is economical because the equipment cost can be reduced.

Further, in the method for producing a glass fiber strand according to the present invention, a plurality of glass fiber filaments formed by pulling out molten glass downward from a plurality of holes provided in the bushing are focused by a focusing device. A method for producing a glass fiber strand, in which a glass fiber strand is formed and the glass fiber strand is wound on a spindle located below the bushing to form a strand winding, and the glass fiber is produced by a detecting means. When the thread breakage of the filament is detected and the thread breakage of the glass fiber filament is detected by the detection means, a shielding cover is provided between the strand winding body and the bushing.

According to the method for manufacturing a glass fiber strand having such a structure, when a thread breakage of the glass fiber filament occurs, it is immediately detected by the detecting means, and a shielding cover is provided between the bushing and the strand winding body. By arranging the shield cover, it is possible to prevent a bead-shaped glass block, a large-diameter glass piece, or the like from falling and adhering to the strand winding body, so that the yield of the glass fiber strand is improved. be able to.

As the effect of the present invention, the following effects are exhibited.
That is, according to the method for producing a glass fiber strand according to the present invention, a bead-shaped glass block or a thick glass fiber block or a thick glass fiber strand is wound around a previously formed glass fiber strand due to thread breakage of the glass fiber filament. It is possible to prevent the glass pieces having a diameter and the like from adhering to them, and it is possible to improve the yield of the glass fiber strands.

The front schematic view which showed the overall structure of the glass fiber strand manufacturing apparatus. The side schematic diagram which showed the overall structure of the glass fiber strand manufacturing apparatus. An enlarged front schematic view showing the positional relationship between the take-up device and the bushing. A flowchart showing the operation procedure of the thread breakage monitoring program. The enlarged front schematic view which showed the relationship between the winding device and a bushing in another embodiment.

Next, an embodiment of the invention will be described with reference to FIGS. 1 to 5.
In the following description, for convenience, the vertical direction of FIGS. 1, 2, 3, and 5 is defined as the vertical direction of the glass fiber manufacturing apparatus 1.101.
Further, in FIGS. 1 and 2, the direction indicated by the arrow A is defined as the drawing direction of the glass fiber filament f or the glass fiber strand S.

[Glass fiber manufacturing equipment 1]
First, the overall configuration of the glass fiber manufacturing apparatus 1 that embodies the method for manufacturing glass fiber strands according to the present invention will be described with reference to FIGS. 1, 2 and 4.

The glass fiber manufacturing apparatus 1 in the present embodiment is a glass fiber formed by spinning molten glass to form a plurality of glass fiber filaments f · f ··· and bundling these glass fiber filaments f · f ···. This is an apparatus for winding the strand S around the collet 100 to form the strand winding Sk.

As shown in FIGS. 1 and 2, the glass fiber manufacturing apparatus 1 mainly controls the operation of the bushing 10, the focusing agent coating device 20, the focusing roller 30, the winding device 40, and the winding device 40. It is composed of.

The bushing 10 draws out the molten glass that has flowed into the inside into a fibrous form to form the glass fiber filament f.
The bushing 10 is formed of, for example, platinum or a platinum alloy, and a plurality of (for example, several thousand) hollow nozzles 11 and 11 arranged in a matrix of a plurality of rows and a plurality of columns are provided at the bottom thereof. ing.

Then, by pulling out the molten glass in the bushing 10 from the hollow portions (holes) of the hollow nozzles 11 and 11 ... In the direction of the arrow A (downward in the present embodiment), the plurality of glass fiber filaments f・ F ... Is molded (spun).

A spray nozzle 12 is arranged below the bushing 10, and a plurality of glass fiber filaments f · f ... (Hereinafter, appropriately “glass” drawn from the plurality of hollow nozzles 11 ・ 11 ... The structure is such that a coolant is sprayed onto the fiber filament group F).
As a result, the glass fiber filament group F is sufficiently cooled by the cooling liquid sprayed from the spray nozzle 12 and sent to the sizing agent coating device 20 described later.

Next, the sizing agent coating device 20 will be described.
The sizing agent coating device 20 is a device for applying a sizing agent (binder) for bundling a plurality of glass fiber filaments f · f ... Spinned by a bushing 10 onto, for example, one glass fiber strand S. ..
The sizing agent coating device 20 comes into contact with the sizing agent in the container 21 for storing the sizing agent and a part of the outer peripheral surface (for example, the lower end portion in the present embodiment) while the axial direction is horizontal. It is composed of a rotating roller 22 and the like that are pivotally supported as described above.

Then, on another portion of the outer peripheral surface of the rotary roller 22 (for example, the front end portion in the present embodiment), a plurality of glass fiber filaments f · f ... Slide while being pressed against each other at a predetermined portion. , A sizing agent is applied to the outer peripheral surface of each glass fiber filament f.

Next, the focusing roller 30 will be described.
The focusing roller 30 is a focusing device for focusing the glass fiber filament group F.
At the central portion in the axial direction of the focusing roller 30, a focusing portion 30A formed of a portion having a diameter smaller than that at both ends in the other axial direction is provided.

Then, the glass fiber filament group F is focused by being gathered by the focusing portion 30A of the focusing roller 30, and a glass fiber strand S having a string-like shape is formed.

Next, the winding device 40 will be described.
The winding device 40 is a device for winding the glass fiber strand S focused by the focusing roller 30 to form a strand winding Sk.

The take-up device 40 includes a frame 41, and is arranged on one side surface (for example, the front surface in the present embodiment) of the frame 41 in a substantially vertical state. A pair of spindles 43 and 43 that are supported and arranged so as to extend parallel to each other and substantially horizontally, and a first drive motor (not shown) attached to a turret board 42 to rotationally drive each spindle 43. Is arranged.

Here, the turret board 42 is rotatably provided about the axis.
A collet 100 is coaxially inserted into each spindle 43, and a second drive motor (not shown) is arranged on the frame 41. The second drive motor causes one spindle 43. When the collet 100 in the above is in the "full winding state", the turret board 42 is driven to rotate 180 ° in order to switch to the other spindle 43.

Then, in the frame 41, a traverse mechanism 44 is arranged in front of the collet 100 at the “execution position X1” of the winding work of the glass fiber strand S, and the glass fiber strand S is wound around the collet 100 by the traverse mechanism 44. The glass fiber strand S is twilled in a direction parallel to the axial direction of the spindle 43.
In this way, the glass fiber strand S is wound around each collet 100 while being twilled by the traverse mechanism 44, and the strand winding Sk is formed.

The glass fiber strand S at the "execution position X1" is located below the bushing 10, specifically, directly below the bushing 10 (vertical direction). For example, as will be described later, the thread of the glass fiber filament f. When a break occurs, a bead-shaped glass block, a large-diameter glass piece, or the like is easily dropped and adhered.
That is, the glass fiber strand S is wound through the collet 100 on the spindle 43 located directly below the bushing 10, which is a position where a bead-shaped glass block, a large-diameter glass piece, or the like is likely to fall and adhere. The strand winding Sk is formed.

By the way, a cutting cover 45 is erected at the center of the turret board 42, and as will be described later, the strand winding Sk has a bushing 10 as the turret board 42 is rotated by 180 ° in a predetermined direction. It is configured to move in a direction away from the position directly below.
Further, as the turret board 42 is rotated by 180 ° in a predetermined direction, the glass fiber strand S that could not be completely wound as the strand winding Sk is wound by the end portion 45a (see FIG. 3) of the cutting cover 45. It is configured to cut at the root portion (cutting position P in FIG. 1) on the Sk side of the body.
That is, as the strand winding Sk moves, the glass fiber strand S that cannot be completely wound as the strand winding Sk is cut at the root portion (cutting position P) on the strand winding Sk side.

The structure is not limited to cutting the glass fiber strand S with the cutting cover 45. For example, as the turret plate 42 is rotated by 180 ° in a predetermined direction, the strand S is wound from the collet A to the collet B, and the collet B is wound. May be cut between collet A and collet B by the force pulling the strand S as it rotates.

By having such a configuration, for example, the glass fiber strand S that could not be wound up is entangled with the moving strand winding body Sk, and it is possible to prevent the occurrence of secondary troubles such as delaying the restoration work of the equipment. Can be done.

When the glass fiber strand S is manufactured by the glass fiber manufacturing apparatus 1 having the above configuration, the yarn is formed on any glass fiber filament f among the plurality of glass fiber filaments f · f ... Drawn from the bushing 10. Cuts may occur.
Then, at the site where such thread breakage occurs, the molten glass drawn from the bushing 10 does not become thread-like but grows substantially spherically, and bead-shaped glass lumps (molten glass beads) are formed. ..
As a result, the formed molten glass beads, the large-diameter glass pieces remaining after the thread breakage, and the like fall and adhere to the strand winding Sk during formation, which reduces the yield of the manufactured strand winding Sk. It was.

Therefore, in the glass fiber manufacturing apparatus 1 of the present embodiment, the operation of the winding device 40 is controlled by the control system 50, and the control system 50 causes the yarn breakage of the glass fiber filament f drawn from the bushing 10. The presence or absence is constantly monitored, and when a thread breakage occurs, the operation of the spindle 43 is immediately stopped and the position of the strand winding Sk is moved in a direction away from the position directly below the bushing 10. , It is intended to avoid a decrease in the yield of the strand winding Sk.

Here, the configuration of the control system 50 and the outline of the thread breakage monitoring program S100 executed by the control system 50 will be described.
The control system 50 includes a camera 51, an image processing device 52, a detection device 53, a control device 54, and the like.

The camera 51 is an example of an image pickup means, and for example, a camera provided with a CCD image sensor or a CMOS image sensor can be adopted as an image pickup element. In this embodiment, a large number of hollow nozzles 11 of the bushing 10 are used. The structure is such that the glass fiber filament group F immediately after being pulled out from 11 ... Can be captured in the field of view.

Then, in the present embodiment, by imaging the glass fiber filament group F immediately after being pulled out from the bushing 10 by the camera 51, the glass fiber filament group F and the glass fiber filament group F are formed in the same region. It is configured to generate "primary image data" that captures molten glass beads, glass fiber filament f that breaks and flickers, and the like.

Next, the image processing device 52 will be described.
The image processing device 52 is a device for image processing the "primary image data" captured by the camera 51, and the "primary image data" is binarized, and based on the result of the binarization processing, "two". It is configured so that "next image data" can be generated.

The image processing device 52 includes an interface connected to the camera 51, a storage device such as a ROM / RAM / HDD, a CPU (calculation unit), a display device, and the like, and is a general-purpose image processing device in which a predetermined image processing program is installed. You can use a personal computer.

Next, the detection device 53 will be described.
The detection device 53 is an example of a detection means, and can detect a glass fiber filament f or a bead-shaped glass block (molten glass beads) that breaks and fluctuates based on the result of binarization processing. It is configured in.

The detection device 53 includes an interface for connecting to the image processing device 52, a storage device such as a ROM / RAM / HDD, a CPU (calculation device), a display device, and the like, and a predetermined thread breakage detection program is installed. It is possible to use a general-purpose personal computer.

Next, the control device 54 will be described.
The control device 54 controls the operation of the winding device 40 according to a signal from the detection device 53.

The thread breakage monitoring program S100 (see FIG. 4) is executed by the control system 50 having the above configuration.
Here, as shown in FIG. 4, the thread breakage monitoring program S100 takes an image of a bundle of a plurality of glass fiber filaments f · f ... By an image pickup means to generate "primary image data" (step S101). ), The image processing step (step S102) of processing the "primary image data" by the image processing means and generating the "secondary image data" based on the image processing result, and thread breakage based on the image processing result. It is composed of a thread breakage detection step (step S103) for detecting.

Specifically, when the glass fiber strand S is manufactured by the glass fiber manufacturing apparatus 1, the glass fiber filaments f · f ... (that is, the glass fiber immediately after being spun from the bushing 10) is in the field of view of the camera 51. The filament group F) is captured, and the imaging step (step S101) is executed by imaging the glass fiber filament group F with the camera 51.

In the imaging step (step S101), an image capturing the glass fiber filament group F is captured in the field of view of the camera 51, and "primary image data" is generated. The "primary image data" generated at this time is input to the image processing device 52 in real time.

Next, in the glass fiber manufacturing apparatus 1, the "primary image data" input to the image processing apparatus 52 is image-processed by the image processing apparatus 52, and the image processing step (step S102) is executed.

In the image processing step (step S102), the "primary image data" is binarized by the image processing device 52, and the "secondary image data" is generated based on the image processing result.

Next, the glass fiber manufacturing apparatus 1 detects the thread breakage based on the image processing result executed in the image processing step (step S102), and the detection device 53 executes the thread breakage detection step (step S103).

In the thread breakage detection step (step S103), the detection device 53 detects a high-luminance region based on the "secondary image data" based on the image processing result, and whether or not the glass fiber filament f is thread breakage. To judge.
Specifically, when the area of the high-luminance region becomes equal to or larger than the threshold value, it is determined that the glass filament f is thread-broken.

In this way, in the detection device 53, the generation of molten glass beads and the glass fiber filament f that breaks and fluctuates is recognized, and when the occurrence of the thread breakage of the glass fiber filament f is detected, the detection device 53 sends the control device 54. A signal to that effect is output.
As a result, as will be described later, the control device 54 stops the operation of the spindle 43 and temporarily suspends the winding of the glass fiber strand S, while the turret plate 42 rotates and the position of the strand winding Sk moves. At the same time, the glass fiber strand S is cut at the root portion (cutting position P) on the Sk side of the strand winding body.

In the present embodiment, "primary image data" is generated by the camera 51, and thread breakage is detected by the data. For example, molten glass beads generated at the orifice position when the glass fiber filament is cut. The change in brightness or radiant heat accompanying the growth of the glass fiber may be detected as an electric signal by a radiation thermometer to detect the breakage of the glass fiber filament.

[Recovery operation]
Next, in the case where the glass fiber strand S is manufactured by the glass fiber manufacturing apparatus 1, the procedure of the restoration operation of the glass fiber manufacturing apparatus 1 when a thread breakage of an arbitrary glass fiber filament f occurs is described in FIG. This will be described with reference to FIG.

First, as shown in FIG. 1, in the glass fiber manufacturing apparatus 1, molten glass is drawn out from a plurality of hollow nozzles 11, 11 ... Provided at the bottom of the bushing 10, and a plurality of thread-like glass fiber filaments are drawn out. f · f ... Is formed.

Further, the formed plurality of glass fiber filaments f.f .... are coated with the sizing agent by the sizing agent coating device 20, and then focused on one glass fiber strand S by the sizing roller 30, and the traverse mechanism 44. Is continuously wound on the collet 100 inserted in the spindle 43 on the "execution position X1" side.
That is, the formation of the strand winding Sk is continuously performed.

In such a state, when a thread breakage occurs in any glass fiber filament f among the plurality of glass fiber filaments f · f ..., the control system 50 immediately causes the yarn based on the thread breakage monitoring program S100 described above. The disconnection is detected, and the rotational operation of the spindle 43 on the "execution position X1" side is stopped.
As a result, the formation of the strand winding Sk is temporarily stopped.

When the rotational operation of the spindle 43 is stopped, the turret board 42 rotates 180 ° in a clockwise direction (direction of arrow B in FIG. 3), for example.
As a result, as shown in FIG. 3, the formed strand winding Sk is moved to the “retracted position X2” which is separated from the position directly below the bushing 10, and the plurality of hollow nozzles 11 and 11 ... It is in a state of being sufficiently retracted with respect to the region Y (position directly below the bushing 10) where the molten glass beads and the like are more likely to fall.

As described above, in the glass fiber manufacturing apparatus 1 of the present embodiment, the control system 50 monitors the thread breakage of the plurality of glass fiber filaments f · f ..., And the control system 50 (more specifically, detection). When the device 53) detects a thread breakage of an arbitrary glass fiber filament f, the formation of the strand winding Sk is stopped, and the strand winding Sk is moved in a direction away from the position directly below the bushing 10. It is supposed to be evacuated.

As a result, when a thread breakage of the glass fiber filament f occurs, the detection device 53 immediately detects it, and a bead-shaped glass block, a large-diameter glass piece, or the like falls at a position below the bushing 10. As a result, the strand winding Sk can be immediately retracted, so that it is possible to prevent bead-shaped glass lumps and large-diameter glass pieces from adhering to the strand winding Sk, and the manufactured glass fiber strands can be prevented. It is possible to improve the yield of S.

Further, as the turret board 42 rotates, the cutting cover 45 also rotates about the axis of the turret board 42. At this time, one side of the cutting cover 45 (upper side in the present embodiment). ) Crosses between the traverse mechanism 44 and the strand winding Sk while in contact with the glass fiber strand S, and as a result, the glass fiber strand S is crossed by the end 45a of the cutting cover 45. It is cut at the "cutting position P (see FIG. 1)".

As described above, in the present embodiment, the spindle 43 is provided on the turret board 42 having the cutting cover 45 as a cutting means for cutting the glass fiber strand S, and the turret board 42 is rotated about the axis. As a result, the strand winding Sk formed on the collet 100 inserted in the spindle 43 is moved in a direction away from the position directly below the bushing 10, and is used as the strand winding Sk via the cutting cover 45. The structure is such that the glass fiber strand S that cannot be completely wound is cut.

By having such a configuration, in the glass fiber manufacturing apparatus 1 of the present embodiment, for example, it is not necessary to separately provide a moving device for the spindle 43 and a cutting device for the glass fiber strand S, and the equipment cost is low. It is economical because it can be converted.

In the present embodiment, the movement of the strand winding Sk, that is, the rotational operation of the turret board 42 is performed by automatic operation, but the present invention is not limited to this, and for example, the control system 50 uses a glass fiber. After the thread breakage of the filament f is detected and the rotational operation of the spindle 43 is stopped, the turret board may be rotated by a manual operation by an operator or by human power to move the strand winding Sk.

However, as in the present embodiment, if the movement of the strand winding Sk is executed according to the automatic operation of the spindle based on the detection signal of the thread breakage of the glass fiber filament f by the control system 50, as described above. Compared to the case where the strand winding Sk is moved manually by an operator or by human power, the strand winding Sk can be retracted more quickly, so that the strand winding Sk has a bead-shaped glass block or a large diameter. It is more preferable because it is possible to more reliably prevent glass pieces and the like from adhering.

When the rotational operation of the turret board 42 is completed and the movement of the strand winding Sk is completed, the strand winding Sk is detached from the spindle 43.
On the other hand, the recovery work of the glass fiber filament f in which the thread breakage has occurred is performed.

Then, as shown in FIG. 1, the plurality of glass fiber filaments f · f ... That have been recovered and are in a normal state are again subjected to the focusing agent coating device 20, the focusing roller 30, the traverse mechanism 44, and the traverse mechanism 44. By setting the collet 100 in which the spindle 43 on the "execution position X1" side is inserted in order, the glass fiber manufacturing apparatus 1 is restored when a thread breakage of an arbitrary glass fiber filament f occurs. The operation ends.

After the restoration operation is completed, the production of the glass fiber strand S is restarted by restarting the rotation operation of the spindle 43 on the "execution position X1" side.

[Glass fiber manufacturing apparatus 101 (separate embodiment)]
Next, the configuration of the glass fiber manufacturing apparatus 101 according to another embodiment will be described with reference to FIG.
While the glass fiber manufacturing apparatus 101 in another embodiment has substantially the same configuration as the glass fiber manufacturing apparatus 1 described above, the configuration of the winding apparatus 140 is partially different from that of the glass fiber manufacturing apparatus 1.
Therefore, in the following description, the differences from the glass fiber manufacturing apparatus 1 will be mainly described, and the description of the configuration equivalent to the glass fiber manufacturing apparatus 1 will be omitted.

In the winding device 140, a movable cover 146, which is an example of a shielding cover, is provided above the collet 100 inserted in the spindle 143 on the “execution position X1” side.
The movable cover 146 is composed of a plate-shaped member having an outer size that can sufficiently shield the strand winding Sk formed on the collet 100, for example, in a plan view.
Further, the movable cover 146 is configured to be movable in the horizontal direction by, for example, an actuator (not shown).

Then, by moving the movable cover 146 by the actuator, the movable cover 146 can be arranged between the strand winding Sk and the bushing 10.
In the case of the present embodiment, the movable cover 146 is arranged at a position directly above the strand winding Sk and a position directly below the bushing 10.

Then, when the glass fiber strand S is normally manufactured by the glass fiber manufacturing apparatus 101, the movable cover 146 is arranged at a position separated from the strand winding Sk (the position of the movable cover 146A in FIG. 5). However, when a thread breakage occurs in any of the plurality of glass fiber filaments f.f ..., the thread breakage is immediately caused by the control system 150 based on the thread breakage monitoring program S100 described above. It is detected and immediately moved to a position directly above the strand winding Sk and directly below the bushing 110 (the position of the movable cover 146 in FIG. 5) by an actuator (not shown).
As a result, the formed strand winding Sk is reliably shielded by the movable cover 146 with respect to the region Y where molten glass beads or the like may fall from the plurality of hollow nozzles 111, 111 ... The Rukoto.

As described above, in the glass fiber manufacturing apparatus 101 of another embodiment, based on the image processing by the control system 150, the yarn breakage of the plurality of glass fiber filaments f · f ... Is monitored, and the control system 150 (more specifically). When the detection device 153) detects a thread breakage of an arbitrary glass fiber filament f, the formation of the strand winding Sk is stopped, and a movable cover is placed above the strand winding Sk and below the bushing 110. 146 is to be arranged.

As a result, when the thread breakage of the glass fiber filament f occurs, the detection device 153 immediately detects it, and the movable cover 146 is arranged between the bushing 110 and the strand winding Sk, and the movable cover 146 is arranged. This makes it possible to prevent bead-shaped glass lumps, large-diameter glass pieces, and the like from falling and adhering to the strand winding Sk, so that the yield of the manufactured glass fiber strands can be improved.

10 Bushing 11 Hollow nozzle 30 Focusing roller (focusing device)
42 Turret board 43 Spindle 45 Cutting cover (cutting means)
50 Control system 53 Detection device 100 Collet 110 Bushing 111 Hollow nozzle 143 Spindle 146 Movable cover (shielding cover)
150 Control system (control means)
f Glass fiber filament P Cutting position S Glass fiber strand Sk Strand winding

Claims (6)

A plurality of glass fiber filaments formed by pulling out molten glass downward from a plurality of holes provided in the bushing are bundled by a focusing device to form a glass fiber strand, which is located below the bushing. A method for producing a glass fiber strand, wherein a strand winding body is formed by winding the glass fiber strand on a spindle.
The detection means detects the thread breakage of the glass fiber filament and
When the thread breakage of the glass fiber filament is detected by the detection means,
The strand winding body is moved in a direction away from the position directly below the bushing.
A method for producing a glass fiber strand, which is characterized in that. In the strand winding
The glass fiber strand that could not be wound on the spindle is cut at the root portion on the strand winding side as the strand winding moves.
The method for producing a glass fiber strand according to claim 1, wherein the glass fiber strand is produced. The movement of the strand winding is
It is executed by automatically operating the spindle based on the detection signal of the thread breakage of the glass fiber filament by the detection means.
The method for producing a glass fiber strand according to claim 1 or 2, wherein the glass fiber strand is produced. The spindle is provided on a turret board having cutting means for cutting the glass fiber strands.
By rotating the turret board,
The strand winding body formed on the spindle is moved in a direction away from the position directly below the bushing, and is separated from the bushing.
The cutting means is configured to cut the glass fiber strands that could not be wound up as the strand winding body.
The method for producing a glass fiber strand according to any one of claims 1 to 3, wherein the glass fiber strand is produced. A plurality of glass fiber filaments formed by pulling out molten glass downward from a plurality of holes provided in the bushing are bundled by a focusing device to form a glass fiber strand, which is located below the bushing. A method for producing a glass fiber strand, wherein a strand winding body is formed by winding the glass fiber strand on a spindle.
The detection means detects the thread breakage of the glass fiber filament and
When the thread breakage of the glass fiber filament is detected by the detection means,
A shielding cover for shielding the strand winding is arranged between the strand winding and the bushing.
A method for producing a glass fiber strand, which is characterized in that. The shielding cover is arranged between the strand winding body and the focusing device.
The method for producing a glass fiber strand according to claim 5, wherein the glass fiber strand is produced.

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