JPH03161503A - Method for reopening operation in filament cutting - Google Patents

Abstract

PURPOSE:To reopen operation in cutting of filament by lowering take up speed when bead is produced by cutting of filament and drawing filament formed by lowering of bead together with other filament. CONSTITUTION:When bead produced by cutting of filament 3 is detected, take up speed is lowered to 1/3 to 1/50 of normal speed. Spindlelike bead 6 is dropped by action of gravity and lowered along the inclined face 10 of guide member 9 and large-size filament 8 travels parallel to other filament 3 which is not cut. A collecting member 5 is horizontally moved and filaments 8 and 3 are pressed to narrow and deep part of V shaped groove and filament 8 is drawn at same speed as other filament 3 by friction force and adhesion of the both. Then drawing speed of the filament is increased up to regular speed and yarn collecting operation is reopened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for producing filaments by drawing a molten heat-softened material flowing out from a large number of small holes provided at the bottom of a pusher at a high regular speed. The present invention relates to a method for resuming work when filament is cut, which makes it possible to automatically and easily restart work when filament cutting occurs during filament harvesting work.

(Prior art) Filament 3 made of a heat-softening material such as glass fiber
is manufactured by a yarn drawing operation in which the molten heat-softened material flowing out from a large number of small holes 2 provided at the bottom of the pusher is drawn at a high regular speed determined according to the desired filament diameter, etc. Ru. (See Figure 2) In the case of glass fibers, a pushing 1 having a small hole 2 with a diameter of about 0.5 to 1.5 mm is used, and a sizing agent is applied to the obtained glass filament by a sizing agent applying device 4. Although a fiber bundle is produced by focusing with the focusing member 5, the filaments 3 may be cut (primary cut) for some reason.

When the filament 3 is cut, an approximately spherical bead of melt is generated in the small hole 2, which is stretched under the action of gravity to form a stretched cone-shaped bead 6.

If the thread-harvesting operation continues as it is, the drawn cone-shaped bead 6 will come into contact with other filaments 3 one after another, resulting in new cutting (secondary cutting) of the filament.

In this way, the cutting of the filaments spreads one after another, and eventually all the filaments are cut.

Traditionally, when a filament breaks, the yarn harvesting process is interrupted and the process is restarted by manually pulling the bead and uncut filament, but restarting the process manually takes a lot of time. However, there were problems in that it required additional labor, increased personnel costs, and reduced productivity.

In order to solve these problems, the inventor of the present invention has conducted repeated studies and developed a filament by drawing the melted heat-softening material flowing out from the numerous small holes provided at the bottom of the pusher at a high regular speed. During the production process, the bead of the molten material produced by filament cutting is detected and taken out as a signal, and the drawing speed is reduced in response to the signal, and the filament drawn at a low speed is A suitable result can be obtained by bringing the filament into contact with the stretched bead and stretching the bead to form a filament with a large diameter, suspending production of regular products during this period, and then increasing the filament stretching speed to the regular speed. This invention was proposed in Japanese Patent Application No. 63-28944 (hereinafter referred to as the "earlier invention").

[Problems to be Solved by the Invention] The previous invention is an extremely effective method for resuming the thread harvesting operation after cutting the filament, but as shown in If the filament is cut, the generated bead will fall without contacting other filaments, making it impossible to restart the work using the method of the prior invention. Also, even if the filament pulled out from the small hole in the center of the pusher is cut, the bead generated by the filament cutting may sometimes come into contact with other filaments and fall down through the gaps between the other filaments. It was found that there is. If the bead falls without contacting other filaments in this way, no secondary breakage will occur due to contact between the bead and the filament, but the molten glass that flows out of the small hole created by the filament breakage will be absorbed by the bead and filament. The filament is stretched by its own weight and has an extremely large diameter, which impedes normal thread-harvesting work.

The object of the present invention is to provide a method for restarting work in the case where the bead falls without coming into contact with other filaments.

[Means to solve the problem]

In order to achieve the above object, the present invention employs the method of manufacturing a filament by drawing the melted heat-softened material flowing out from a large number of small holes provided at the bottom of the bunsing in one step at a high regular speed. During yarn work, the molten C bead produced by cutting the maffilament is detected and taken out as a signal, and in response to the signal, the drawing speed of the uncut filament is lowered to 1 to make a larger diameter filament, and during this time, the filament is made into a genuine product. The filament or bead formed by the descending bead is brought into contact with the large diameter filament, and the frictional force or adhesion force between the two causes one of the beads to change its falling direction due to the action of gravity. The filament formed by drawing is drawn, and the drawing speed of the filament is increased to the normal speed, thereby restarting the filament cutting operation.

Alternatively, the falling direction of the bead can be changed by lowering the bead along an inclined surface by the action of gravity, and the downward direction of the bead can be changed by blowing gas onto the filament or heed formed by the lowering of the heed. changes the direction of fall of the bead by applying a substantially horizontal mechanical force to the filament or bead formed by the bead's descent.

In addition, the reduced drawing speed is 173 to 1/50 of the normal speed.
, preferably 1/6 to 1/30.

Further, the large-diameter filament and the filament formed by the downward movement of the bead are made to run through the square-shaped groove, and the V-shaped groove is moved in the direction in which the width of the groove becomes narrower, thereby bringing these filaments into contact with each other.

Next, the invention according to claim 2 will be explained in more detail with reference to FIGS. 1 to 4.

The molten glass flowing out from the small holes 2, 2, ... of the pushing 1 is drawn at a regular speed of about 300 to 1000 m/min, and a filament of about 3 to 20 μm is drawn. Ru. These filaments are cooled by spraying water in accordance with a known method, and then a binder is added to them, and the fibers are collected by a collecting member 5 to form fibers, which are then wound by a winding device (not shown) rotating at high speed. and a glass fiber bundle is produced. By this high-speed winding, the filament is drawn at the above-mentioned normal speed and yarn harvesting is performed.

The fiber bundle may also be pulled by contact with a pulling wheel, where the pulling force stretches the molten glass.

A bead produced by cutting the filament 3 is detected and taken out as a signal. Bead is in the 6th position immediately after receiving a life warning.
It has a spherical shape as shown by the dotted line in the figure, and it is appropriate to detect the bead in this state.

The diameter of the spherical bead 7 is 5 compared to the filament 3.
The diameter of the spherical bead 7 can be detected using, for example, an image sensor, and there is no particular limitation on the detection means.

The detected vigor of the bead is taken out as a signal, and based on this signal, the drawing speed is reduced to 1/3 to 1/50, preferably 1/6 to 1/30 of the normal speed.

By lowering the drawing speed, the diameter of the filament 3 becomes larger.

If this speed is too high, as will be described later, when the filament 3 comes into contact with the bead 6 or the extremely large filament 8 (abbreviated as large diameter filament) formed by the descending of the bead 6, the filament will break. If this speed is lower than the above range, the diameter of the filament will become too large, the fiber bundle will easily break, and the time required to restart work will be too long.

Although it is practical to reduce the drawing speed by lowering the rotational speed of the winding device, it is also possible to use a separate pull roll to pull the fiber bundle at a low speed, during which time the fiber bundle is drawn to produce a regular product. It is appropriate to interrupt the work.

Note that when lowering the rotational speed of the winding device, it is preferable to wind the fiber bundle made of large diameter filaments separately from the fiber bundle that is wound at the normal speed. It becomes possible to use the fiber bundle as a desired product.

For winding the two fiber bundles separately, for example, a winder can advantageously be used.

The spindle-shaped bead 6 falls under the action of gravity, as shown in FIG. The molten glass flowing out from the small hole is drawn at a low speed by the falling bead, and a large-diameter filament 8 is formed.

A guide member 9 is provided at the bottom of the pushing. The guide member 9 is provided with a pair of opposing inclined surfaces 10, 10, and the pair of inclined surfaces 10, IO are formed so that the distance between them becomes narrower toward the bottom.

The spacing l of the upper ends of the inclined surfaces 10.10 is greater than the spacing l0 of the outermost tips of the pushing l, preferably ff
io+10 to 30 InI1, and it is preferable to make the interval between the lower ends as narrow as possible. If it is too wide, it will be difficult for the bead to come into contact with the adjacent filament. The angle of inclination is suitably 45 to 85 degrees, preferably 60 to 80'. Note that a guide member having a conical or pyramidal inclined surface may also be used. The guide member 9 can be made of ceramics or heat-resistant metal, but it is preferable to use graphite, so that work can be resumed smoothly.

The fallen bead 6 is placed on the inclined surface 1 constructed as described above.
0, the large diameter filament 8 descends along the inclined plane IO as shown by the arrow, and is guided to the center of the pushing I, and as shown in FIG. and drive.

In this state, the focusing member 5 is moved in the direction in which the width of the ■-shaped groove becomes narrower as shown by the arrow. The large diameter filament 8 and the other filament 3 are pressed against the narrow inner part of the V-shaped groove and come into contact with each other, and due to the frictional force and adhesion force between the two, the large diameter filament 8 moves at the same speed as the other filament 3. It is pulled by the above-mentioned winding device or pull roll.

Although the focusing member 5 can be moved horizontally, it is preferable to rotate the focusing member 5 in an arc.

For example, as shown in FIG.
1 in the direction shown by the arrow.

When the focusing member 5 is in position A, the ■-shaped groove is separated from the filament 3 and the large diameter filament 8, but the focusing member 5
When the filament 3.8 rotates to position B, the filament 3.8 comes to be located at the widest part at the tip of the V-shaped groove, and the filament runs in the ■-shaped groove. Next, when the focusing member 5 is rotated to the position C, this rotation (movement) causes ■
The narrowest part of the mold groove comes into contact with the filament 3.8, and the filaments 3 and 8 come into contact.

Next, the filament drawing speed is increased to the normal speed, and the yarn harvesting operation is restarted. The filament drawing speed may be increased after the disappearance of the bead is confirmed by a detection device, or the drawing speed may be reduced and a predetermined time determined empirically elapsed.

In the invention as set forth in claim 3, by blowing gas onto the large diameter filament or bead 6 formed by the descending of the bead 6, the falling direction of the bead 6 is changed and brought into contact with the adjacent filament. Suitably, the gas is ejected approximately horizontally from a small hole or nozzle provided below the pusher.

It is desirable that the ejection speed be about 5 to 20 m/sec.

In the invention according to claim 4, a round rod is applied to the filament or bead that is caught in the downward movement of the bead, and the falling direction of the bead is changed by applying mechanical force by moving the round rod in a horizontal direction. Bring it into contact with the adjacent filament.

[Effect]

The bead of the molten material produced by cutting the filament is detected on the left and taken out as a signal. In response to the signal, the drawing speed of the uncut filament is reduced to make it into a larger diameter filament. During this time, production of regular products is interrupted and the action of gravity is applied. The filament formed by the falling bead is changed by changing the falling direction of the bead, or the bead is brought into contact with the large diameter filament, and the filament formed by the falling bead is stretched by the frictional force, adhesion force, etc. between the two. , then by increasing the filament drawing speed to the normal speed,
To automatically restart yarn harvesting work when a bead falls without contacting other filaments.

The falling direction of the bead is changed by lowering the bead along an inclined surface by the action of gravity, and the large diameter filament and the large diameter filament formed by the lowering of the bead are run in a V-shaped groove. By moving the mold groove in the direction in which the groove width becomes narrower, these filaments are brought into contact with each other, thereby making it possible to restart the work more smoothly.

〔Example〕

The molten glass was allowed to flow out from the small hole provided at the bottom of the punching, and was drawn at a normal speed of 10 m/sec.
A glass filament of μ was produced.

The generation of beads caused by cutting the filament is detected by an image sensor, and the filament drawing speed is reduced to 1 m/sec based on the signal taken out, and the thickness of the glass filament is set to 33 μm. The yarn harvesting work was suspended during this time.

Grapher f as shown in Figures 1 to 3 shows the grown beads.
The large diameter filament 3 and the large diameter filament 8 are brought into contact with each other by guiding the large diameter filament 3 to the center of the pushing, as shown in FIG. The large-diameter filament 8 was drawn by the adhesive force caused by the moisture, and the diameters of both filaments were made to be the same.

The spinning operation was then restarted by increasing the filament drawing speed to the normal speed. The time required to resume work was 8 seconds.

〔Effect of the invention〕

To automatically restart work when a filament is cut and the generated bead falls without contacting other filaments.

[Brief explanation of the drawing]

1.2.3 are perspective views for explaining the method of the present invention, FIG. 4 is a front view, and FIG. 5. FIG. 6 is a front view for explaining the conventional method. In the figure, 1 is a pusher, 2 is a small hole, 3 is a filament,
4 is a focusing agent applying device, 5 is a focusing member, 6 is a spindle-shaped bead, 7 is a spherical head, 8 is a large diameter filament, 9 is a guide member, 10 is an inclined surface, 1 (1) is a holder , 1 2 indicates the fixture. Figure 4 beginning Figure 5

Claims (6)

[Claims] (1) In the yarn-harvesting operation in which filament is produced by drawing the molten heat-softened material flowing out from a number of small holes provided at the bottom of the pusher at a high regular speed, A means of detecting the bead of an object and extracting it as a signal. b) Means for reducing the drawing speed of the uncut filament in response to the above-mentioned signal to make the uncut filament into a large diameter filament, and interrupting production of regular products during this time. c) Means for changing the falling direction of beads falling under the action of gravity. d) Means for bringing the filament or bead formed by the downward movement of the bead into contact with the large-diameter filament and drawing the filament formed by the downward movement of the bead by the friction or adhesion force between the two. e) means for increasing the drawing speed of the filament up to the normal speed. How to restart work when filament is cut, including. (2) The method for restarting work upon cutting a filament according to claim 1, wherein the falling direction of the bead is changed by lowering the bead along an inclined surface under the action of gravity. (3) The method for restarting work upon cutting a filament according to claim 1, wherein the falling direction of the bead is changed by blowing gas onto the filament or the bead formed by the descent of the bead. (4) The method for restarting work after cutting a filament according to claim 1, wherein the falling direction of the bead is changed by applying a substantially horizontal mechanical force to the filament or bead formed by the descending of the bead. (5) The reduced drawing speed is 1/3 to 1/5 of the normal speed.
0, preferably 1/6 to 1/30.
The method for restarting work after filament cutting as described in 3 or 4. (6) A large-diameter filament and a filament formed by lowering the bead are made to run in a V-shaped groove, and the V-shaped groove is moved in a direction in which the groove width becomes narrower to bring these filaments into contact with each other. , 2, 3, 4, or 5. The method for restarting work after filament cutting as described in 2, 3, 4 or 5.