JP2005041673A - Disconnected thread processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disconnected thread processing device capable of smooth and quick disconnection treatment almost without accumulation of lines of thread in a spinning cylinder upon occurrence of disconnection, when multi-filament lines of thread formed of a thermoplastic synthetic fiber, for example with a size of a single fiber of 2 dtex or less is melt-spun, or cospun. <P>SOLUTION: This disconnected thread processing device is installed to a thread melt-spinning device having at least an oil agent giving means (7) installed in thread spinning cylinders (3), (5) cooling a plurality of multi-filament lines of thread (Y) formed of a spun thermoplastic synthetic fiber. The disconnected thread treatment device comprises a disconnected thread detecting means detecting disconnection of the line of thread (Y), and thread removing means (12), (13), (14) and (15) for separating the traveling lines of thread (Y) from the oil agent giving means (7) by disconnected thread detection signals from the disconnected thread detection means. The device also comprises a thread line suction means (8) downstream of the oil agent giving means (7), a thread line cutting means (9) installed immediately below the thread line suction means (8), and thread line collecting means (10) and (11) collecting a plurality of the lines of thread (Y) to a thread line suckable position of the thread line suction means (8) along a thread line traveling direction in this order. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a yarn breakage treatment apparatus used when breakage occurs in a melt spinning apparatus for thermoplastic synthetic fibers such as nylon and polyester.

  In recent years, in the synthetic fiber industry, the processing speed in the spinning process has been increased. For example, in the melt spinning process, it has become common for the spinning speed to exceed 3000 m / min. Thus, when the processing speed is increased, the air resistance received by the spun yarn increases, and as a result, the spinning tension also increases. Further, when the traveling yarn is taken up between the rollers or travels in contact with the yarn path regulation guide, the yarn tension increases due to the frictional resistance at the time of contact. When the yarn tension is increased in this manner, the yarn is likely to break when some factor acts, and in fact, the occurrence of yarn breakage due to the increase in the spinning speed is increasing.

  For this reason, in recent spinning machines, in order to reduce the spinning tension, an oil film is formed on an oiling roller, which has been conventionally used, and a thread is run on the oil film to apply the oil. Therefore, a metering oil system using an oil supply guide is generally used. Further, in order to increase production efficiency, a multi-spindle spinning machine such as 6-spindle take-up, 8-ply take-up, and 12-pile take-up is becoming common in order to increase the number of spindles that simultaneously process a large number of yarns. Although it is different from multi-concentration, from the viewpoint of spinning a plurality of yarns, two or more types of polymers are spun from different bases while being a single spinning machine. A method for producing a cospun mixed yarn, which is obtained by combining the obtained yarns and mixing them using an entanglement nozzle or the like and then winding them with a winder, is being developed.

  In recent years, when high added value and differentiation of synthetic fibers have been achieved, today, the yarns to be manufactured tend to be finer and multifilament, and the yarns to be manufactured. The single fiber fineness of the strip is mainly 2 dtex or less, and fibers of 1 dtex or less can be spun. Accordingly, when the single fiber fineness of the yarn to be produced in this way becomes small and a situation is produced in which a fine yarn is produced, yarn breakage is more likely to occur.

  As mentioned above, when yarn breakage occurs in the melt spinning process, it is not possible to continue spinning, as well as winding around a rotating body such as a roller, or the yarn end that has been broken reaches the adjacent weight. This will cause a situation in which the broken yarn propagates to the adjacent weight. Therefore, it is necessary to perform an appropriate yarn cutting process so as not to cause such a situation as soon as yarn breakage occurs, and considering the increasing tendency of the frequency of yarn breakage in the recent melt spinning process as described above, It can be said that the importance of such yarn breakage processing is increasing.

  Therefore, in order to appropriately handle the occurrence of yarn breakage in a spinning facility that winds such a multi-yarn group of yarns at a spinning speed of 3000 m / min or more, FIG. Such a yarn breaker is proposed in Japanese Patent No. 2786603. Here, the conventional yarn breaker illustrated in FIG. 4A will be described. The yarn suction for sucking the yarn Y spun from the spinneret 1 ′ into the lower end portion of the spinning tube 3 ′. A means 10 'is provided, and a yarn cutting means 9' and a yarn converging device 6 'are provided between the lower end of the spinning cylinder 3' and the oil supply guide 5 '. Note that in this prior art, the oiling guide 5 'does not exist in the spinning cylinder 3', but is provided at a position protruding from the spinning cylinder 3 '. From the yarn cutting means 9', That is, there is no obstacle on the upstream side where the cut yarn Y is entangled.

  In the yarn breakage processing apparatus configured as described above, when a yarn breakage is detected by a yarn breakage detection unit (not shown), the yarn breakage detection from the yarn breakage detection unit is detected as shown in FIG. In response to the signal, the yarn focusing guides 6a 'and 6b' attached to the yarn focusing device 6 'project from the left and right to focus the yarn group Y to a position on the center line of the yarn suction means 10', and Compressed air is supplied to the yarn suction means 10 'so that the yarn group Y can be sucked. At almost the same time, the yarn cutting means 9 'operates to cut the converged yarn group Y at a position directly below the lower end of the spinning cylinder 3'. Then, the yarn group Y is sucked by the yarn suction means 10 'simultaneously with the cutting and discharged out of the spinning cylinder 3'. At this time, the yarn Y cut by the yarn cutting means 9 ′ is loosened and appears to be easily wound. As described above, in this prior art, the yarn is disposed upstream from the yarn cutting means 9 ′. There are no obstacles that wrap around the strip. Therefore, in this prior art, the yarn breaking process is smoothly performed, and thereafter, after predetermined processing after the yarn breaking, such as removing the yarn Y wound around the roller or the like, is left in the yarn suction means 10 ′. The yarn group Y that has been transferred can be transferred to a yarn hook such as a suction gun, and re-threading can be performed to return to the normal yarn making process.

  However, when the fineness of the single fiber is reduced to 2 dtex or less and the single fiber diameter is reduced, the fiber is cooled to a temperature not higher than the glass transition point, which is the cooling end point of the molten polymer spun from the base 1 ′. Therefore, the distance is shortened as necessary, and it is closer to the base 1 ′ direction than in the past. As a result, stable spinning cannot be performed unless the refueling guide 5 ′ is attached to a position directly below the blow-off completion surface 2 a ′ of the cooling air blown from the cooling air blowing device 2 ′. Then, when the yarn breakage occurs in a state where the oil supply guide 5 ′ is attached at such a position in the spinning cylinder 3 ′, the oil supply guide 5 ′ becomes the yarn suction means 10 ′, the yarn cutting means 9 ′ and the yarn. It will be located upstream from the strip focusing device 6 '.

  For this reason, when the yarn Y is cut by the yarn cutting means 9 ′ and is sucked by the suction device 10 ′, the yarn Y is caused by factors such as a drop in tension that occurs momentarily when the yarn Y is cut. A phenomenon occurs in which it is loosened, detached from the oil supply guide 5 ', caught and entangled. Then, the yarn Y is not attracted well to the yarn suction means 10 ′, causing a suction error, and the yarn Y spun one after another from the upstream side accumulates in the spinning cylinder 3 ′. Will occur.

  Also, in the melt spinning process, the apparatus must be vertically long, so on the layout, the spin block where the base 1 'is usually provided and the cooling device 6 are installed on the second floor part of the building and on the downstream side The winder to be placed will be installed on the first floor of the building. Then, once the problem that the yarn Y accumulates in the spinning cylinder 3 ′ as described above occurs despite the restrictions on the layout, the yarn suction unit 10 ′, the yarn cutting unit, Since 9 'and the yarn converging device 6' are installed directly under the cooling air blowing completion surface 2a ', there is almost no work space in this portion, and the downwinding machine from the yarn suction means 10' There arises a problem that it becomes difficult to deliver the yarn Y to the yarn hooking suction gun.

In the above-mentioned cospun spinning, two or more kinds of polymers are used, and yarns having different fineness are simultaneously spun by one spinning machine, so that the solidification positions may be different between the two. In this case, the oiling guide 5 'must be installed at different positions, and one yarn must be installed upstream of the yarn suction means, the yarn cutting means, and the yarn focusing guide. If both yarns are not installed upstream of each device, stable spinning may occur, and the same problem as when spinning yarns having a single fiber fineness of 2 dtex or less occurs.
Japanese Patent No. 2786603

  In view of the problems of the prior art, the object of the present invention is particularly advantageous when, for example, melt spinning or performing cospun spinning of multifilament yarns made of thermoplastic synthetic fibers having a single fiber fineness of 2 dtex or less. Thread breakage that eliminates the problems of the prior art that become prominent and causes little or no yarn accumulation in the spinning cylinder when the breakage occurs, thus enabling smooth and quick breakage processing. It is to provide a processing apparatus.

Here, as the present invention for achieving the above object, an oil agent provided in a spinning cylinder for cooling a plurality of multifilament yarns made of spun thermoplastic synthetic fibers according to claim 1 is provided. A yarn breakage treatment apparatus provided in a melt spinning apparatus having at least a means,
The yarn breakage processing device is configured to separate the yarn traveling by the yarn breakage detection signal from the yarn breakage detection unit from the oil agent applying unit, and to detect that the yarn has been broken. There is provided a yarn breakage processing apparatus comprising a yarn removing means.

  In this case, the present invention is as described in claim 2, “in the downstream portion of the oil applying means, a yarn suction means, a yarn cutting means provided immediately below the yarn suction means, and a plurality of The yarn breaking device according to claim 1, wherein the yarn converging means for converging the yarn to a yarn suckable position of the yarn sucking means is provided in this order along the yarn traveling direction. Is preferred.

  According to a third aspect of the present invention, as described in the third aspect of the present invention, “the yarn suction means, the yarn cutting means, and the yarn converging means are provided downstream from the lower end of the spinning cylinder. It is preferable to use a "thread breaker".

  According to a fourth aspect of the present invention, as described in claim 4, "the yarn removing means is capable of moving forward and backward in the running direction of the yarn and provided above and below the oil agent applying means, respectively. 4. An apparatus comprising a member and a yarn path regulating guide, and further comprising an actuator for moving the yarn removing member and the yarn path regulating guide in a yarn removing direction in response to a yarn breaking detection signal from the yarn breaking detecting unit. It is preferable to use the yarn breakage treatment apparatus according to any of the above.

  Furthermore, as described in claim 5, the present invention is applied to a melt spinning apparatus for spinning a multifilament yarn having a single fiber fineness of 2 dtex or less. The described yarn breakage treatment apparatus is preferable.

  And, as described in claim 6, the present invention is “applying to a cospun spinning device that spins, respectively mixes and mixes yarns made of two or more types of thermoplastic synthetic fibers having different solidification points. The yarn breakage treatment apparatus according to any one of claims 1 to 5 is preferable.

  First, since the present invention has the configuration described in claim 1, even if the yarn breaks, the yarn removing means that pulls the traveling yarn away from the oil agent applying means causes the yarn to be put into the spinning cylinder during the yarn breaking process. The yarn does not get tangled in the oil agent applying means existing as an obstacle. For this reason, the entanglement of the yarn to the oil agent applying means, which causes the yarns spun one after another in the spinning cylinder, is prevented, and the work to be carried out in the narrow spinning cylinder is thus proposed, and smooth and Enables quick thread breakage.

  Moreover, since this invention has the structure described in the said Claim 2, even if it cut | disconnects a thread | yarn under the oil agent provision means, the situation where a running yarn loosens at the time of a cutting | disconnection and it becomes entangled with an oil agent provision means can be avoided. . Therefore, it is possible to provide the yarn suction means, the yarn cutting means, and the yarn focusing means at the downstream portion of the oil agent applying means.

  Further, since the present invention has the configuration described in claim 3, the yarn suction means, the yarn cutting means, and the yarn converging means can be provided further downstream from the lower end of the spinning cylinder, and are performed in the spinning cylinder. There is almost no thread breakage. For this reason, the lower end of the spinning cylinder descends to the first floor, and the joint work on the upper and lower floors is reduced, and the yarn that has been subjected to the yarn breaking process and sucked by the yarn suction means is operated. By passing to the suction gun, re-threading with respect to the melt spinning apparatus becomes easy.

  In addition, since the present invention has the configuration described in the above-described fourth aspect, upon receiving a yarn breakage detection signal from the yarn breakage detecting means, the actuator is immediately operated to remove the yarn removing member and the yarn path regulating guide from the yarn. It can be driven in the direction, and the yarn running on the oil agent applying means can be smoothly and quickly separated from the oil agent applying means.

  Furthermore, since the present invention has the structure described in claim 5, the oil agent applying means is inevitably provided in the spinning cylinder as in a melt spinning apparatus for spinning a multifilament yarn having a single fiber fineness of 2 dtex or less. In particular, it has a remarkable effect when it enters the cooling air blowing surface. Since the present invention has the configuration described in claim 6 above, for the same reason as the invention described in claim 5, each of the yarns composed of two or more types of thermoplastic synthetic fibers having different solidification points is spun, When applied to a cospun spinning device that mixes and mixes fibers, it has a remarkable effect.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic apparatus configuration diagram including a melt spinning apparatus schematically illustrated for explaining an embodiment of a yarn breakage treatment apparatus of the present invention. In FIG. 1, (a) is a front view, (b) ) Figures show side views respectively. In FIG. 1, 1 is a spin block, 2 is a spinneret, 3 is an upper spinning cylinder, 4 is a cooling air blowing surface, 5 is a lower spinning cylinder, 6 is a cooling air supply unit, and 7 is an oil supply of a guide oil supply system. Means 8, yarn suction means, 9 is yarn cutting means, 10 is a yarn focusing member, 11 is an actuator for driving the yarn focusing member, 12 is a yarn removing member, 13 is an actuator for driving the yarn removing member, and 14 is a yarn. A road regulation guide, 15 is an actuator for driving the yarn path regulation guide, and Y is a yarn group made of thermoplastic synthetic fibers such as polyester and nylon. The base 2 is incorporated into the spin block 1 as a spinneret pack.

  Here, a known melt spinning process to which the present invention is applied will be briefly described. A thermoplastic polymer melted by a melt extruder (not shown) or the like is transported by a metering means such as a gear pump to be spin-block 1. Are spun into the upper spinning cylinder 3 from the discharge hole groups respectively formed in a plurality (six in this example) of the nozzle groups 2 provided in the upper spinning cylinder 3. Next, a plurality of (six in this example) multifilament yarns Y spun in this way are supplied from the cooling air supply unit 6 and cooled from the cooling air blowing surface 4 into the upper spinning cylinder 3. Cooled by wind. In the example of FIGS. 1 to 3, a horizontal blowing cooling method in which cooling air is blown in a direction substantially perpendicular to the running direction of the yarn Y is shown. However, the yarn running in the upper spinning cylinder 3 is shown. It is also possible to employ a vertical blowing cooling system in which cooling air is blown from the entire circumference of Y and the cooling air is caused to flow along the running direction of the yarn Y. In this way, the spinning yarn Y, once cooled to a temperature below the glass transition point (solidification point) by blowing cooling air, is provided with an oil agent by the oil supply means 7 of the guide oil supply system. Then, after traveling in the lower spinning cylinder 5 as it is, after applying entanglement for entanglement of filaments (single fibers) with an entanglement applying device (not shown) as necessary, a take-up roller (not shown) is used. It is taken up at a predetermined speed and taken up as a yarn package by a winder (not shown) arranged at the most downstream position.

  When yarn breakage occurs in the melt spinning process as described above, the yarn breakage treatment apparatus of the present invention is required in order to cause various problems as described in the “Background Art” section. Next, the yarn breakage treatment apparatus of the present invention will be described in detail.

  When breakage occurs in the melt spinning process, it is necessary to automatically detect this. However, such a breakage detection means (not shown) is used to detect which yarn Y is spun in the melt spinning process. In order to enable detection even when the yarn is broken at such a location, it is usually provided immediately upstream of the winder disposed at the most downstream. As such a yarn breakage detecting means, a contact type yarn breakage detector that monitors the tension of the yarn Y online by bringing a tension pickup into contact with the running yarn Y, or a projector and a light receiver are used as the running yarn. Known yarn breakage detecting means such as a non-contact type yarn breakage detector that detects the presence or absence of the yarn Y by monitoring the change in the amount of light on-line with the Y interposed therebetween can be used. Further, the yarn breakage detecting means, the yarn removing member 12, the yarn path regulating guide 14, the yarn suction means 8, the yarn cutting means 9, and the yarn converging member 10 which will be described later are broken from the yarn breakage detecting means. It is set to operate in conjunction with each other according to the detection signal to perform the yarn breaking process. However, such interlocking is not performed only by the thread breakage detection signal from the thread breakage detection means, but a forcible operation switch that can forcibly perform thread breakage processing is provided, and if necessary, a person can set the forcible operation switch. It is preferable to forcibly interlock by operating.

  Here, the yarn breakage processing apparatus of the present invention performs the yarn breakage processing immediately when the yarn breakage is detected by the yarn breakage detection means. For this purpose, first, the yarn traveling on the oil supply guide of the oil supply means 7 is used. Thread removal means for removing the strip Y from the oiling guide is provided. This yarn removing means is for preventing the broken yarn from being entangled with the oil supply guide and hindering the subsequent yarn breaking process. Therefore, in order to perform such processing, the yarn removing means includes a yarn removing member 12 and a yarn path regulating guide 14 provided above and below the oil agent applying means 7, and further, these yarn removing member 12 and the yarn path regulating guide. The guide 14 includes a yarn removing member driving actuator 13 and a yarn path regulating guide driving actuator 15 for allowing the guide 14 to move forward and backward in the yarn removing direction. However, the actuators 13 and 15 are preferably installed on the side surfaces of the spinning cylinder 3 or 5 as shown in the figure.

  Here, with regard to the yarn removing member 12 and the yarn path regulating guide 14, during normal melt spinning, one yarn removing member 12 is moved backward with respect to the yarn Y so as not to contact the yarn Y. The other yarn path regulation guide 14 always regulates the yarn path of the traveling yarn Y to the correct position and presses the yarn Y against the oil supply guide of the oil supply means 7 while maintaining an appropriate contact pressure. It plays the role of making the oil agent surely applied by contacting. Therefore, when the yarn breakage occurs, the yarn removing member 12 moves forward in the yarn Y direction to remove the yarn Y from the oil supply guide 7, and at the same time, the yarn path regulating guide 14 moves away from the yarn Y direction. Retreat for.

  Since the yarn removing means of the present invention is configured as described above, when yarn breakage is detected by the yarn breakage detecting means, the yarn removal member drive actuator 13 and the yarn path regulation guide drive are received in response to the detection signal. The actuator 15 is actuated to immediately move the yarn removing member 12 and the yarn path regulating guide 14 in the yarn removing direction, and the yarn Y traveling on the oil agent applying unit 7 is pulled away from the oil agent applying unit 7. At this time, the actuator for driving the yarn removing member 12 and the yarn path regulating guide 14 need not be particularly limited as long as the yarn removing member 12 and the yarn path regulating guide 14 can be normally operated. However, a fluid pressure cylinder that operates by fluid pressure such as air pressure or hydraulic pressure is suitable because it is inexpensive and excellent in handling.

  Further, the shape and material of the yarn removing member 12 and the yarn path regulating guide 14 are not particularly limited as long as they have the required functions, but the contact portion with the yarn Y is related to the yarn. It has an appropriate surface roughness and abrasion resistance that reduces the frictional resistance with Y, and even if the yarn Y travels in contact therewith, it does not damage both the yarn Y and the yarn removing member 12. Needless to say, it must be finished.

  In the yarn processing apparatus of the present invention, when yarn breakage occurs, the broken yarn accumulates in the spinning cylinders 3 and 5 or winds around a take-up roller (not shown) and damages peripheral devices. The main feature is that adverse effects are avoided, the spread of the yarn breakage to the adjacent weight is prevented, and re-threading is easy. For this purpose, it goes without saying that the yarn group Y supplied one after another from the spin block 1 needs to be simultaneously sucked into the yarn suction means 8. It should be noted that the yarn breakage processing means of the present invention is, as mentioned above, the yarn suction means 8 when the yarn Y gets entangled with the oil supply guide of the oil agent applying means 7 as described above. Therefore, the above-described yarn removing means is required because it is impossible to suck the yarn group Y well.

  Therefore, in order to normally suck the yarn group Y supplied one after another from the spin block 1 when the yarn breaks into the yarn suction means 8 at the same time without any suction error, the yarn breakage treatment apparatus of the present invention further includes The yarn suction means 8, the yarn cutting means 9, and the yarn focusing member 10 are provided in this order from upstream to downstream where the yarn Y travels. However, the yarn converging member 10 is provided with an actuator 11 for driving the yarn converging member, and this actuator 11 is the same as the yarn converging device 6 ′ described in the “Background Art” section with reference to FIG. To work. That is, the yarn converging members 10 and 10 provided at both ends of a plurality of (six in this example) yarns are protruded by the actuators 11 and 11 in the running direction of the yarn group Y, and the yarns are projected. The focusing members 10 and 10 serve to focus the yarn group Y to a position on the center line of the yarn suction means 8.

  The converging process of the yarn group Y by the yarn concentrating members 10 and 10 performed at this time is performed simultaneously with or immediately after the operation of the yarn removing means according to the yarn breaking signal from the yarn breaking detecting means. Is called. At the same time or immediately after this, the yarn suction means 8 can suck the yarn Y by the yarn breakage detection signal sent to the yarn suction means 8. The yarn suction means 8 is preferably of a type that obtains a large yarn suction force using compressed air and discharges the sucked yarn with high tension by a high-speed swirling flow. . In addition, when this type of yarn suction means 8 is used, there is an advantage that the yarn suction means 8 can be brought into the suction state easily and quickly by turning on and off the compressed air supplied by the pneumatic valve.

  As described above, for example, by opening a pneumatic valve (not shown), when the yarn suction means 8 is in a state in which the yarn group Y can be sucked at any time, the yarn focusing members 10 and 10 and Thus, all the yarn groups Y in which the yarn groups Y are focused on substantially the center line of the yarn suction means 8 are cut at once by the operation of the yarn cutting means 9. At that time, as the yarn cutting means 9, usually, a type that cuts by moving a scissors-like cutting blade is preferably used, but if necessary, a heater method, a hot air method, or other known methods Means are also available. It should be noted that the installation position of the yarn suction means 8 at this time needs to be a position corresponding to the forward end position of the yarn focusing members 10 and 10 so that the yarn group Y cut at the same time is not mistakenly sucked. is there.

  As described above, when the yarn breakage occurs, when the yarn breakage treatment apparatus of the present invention is operated, the yarn group Y successively sent from the spin block 1 is cut, and the yarn end is turned to the yarn end. By sucking the suction means 8, extra yarn is not sent downstream of the yarn suction means 8. As a result, the yarn Y is wound around the take-up roller after the yarn is broken to cause thickening, and the attached equipment is not damaged or the adjacent weight is not affected by the yarn breakage.

  Further, since the chance of making a suction mistake by being entangled with the oil supply means 7 is greatly reduced, the yarns that have been broken in the spinning cylinders 3 and 5 do not stay and accumulate. Furthermore, when re-threading, the operator needs to reciprocate between the upstairs and downstairs, and the two workers must wait on the upstairs and downstairs to deliver the yarn. When one operator receives the yarn group Y sucked by the yarn suction means 8 downstairs in the suction gun for threading, the threading through the spinning cylinders 3 and 5 can be easily performed. it can. The threading operation is necessary not only in this case, but also after replacement of the spinning pack and after cleaning of the so-called base surface foreign matters such as monomers and oligomers adhering to the base surface. It is possible to minimize human, physical, and time loss by performing an appropriate yarn cutting process.

  As described in detail above, the yarn breakage treatment apparatus of the present invention has various advantages, but when this is applied to the cospun spinning process, a greater effect can be obtained. Details will be described with reference to FIG. 2 and 3 are schematic apparatus configuration diagrams including the cospun spinning apparatus schematically illustrated for explaining two embodiments when the yarn breakage treatment apparatus of the present invention is applied to the cospun spinning process. 2 and 3, as in FIG. 1, (a) is a front view and (b) is a side view.

  In general, in cospun spinning, a plurality of (two in this example) multifilament yarns Ya made of thermoplastic polymers having different physical properties such as fineness, filament count, boiling water shrinkage, elongation, and strength of a single fiber and Yb was spun from the bases 2a and 2b, respectively, and the spun yarns Ya and Yb were supplied from the cooling air supply unit 6 to a temperature below the glass transition point under appropriate conditions, and were blown out from the cooling air blowing surface 4. Cool each with cooling air. Then, after applying the oil agent by the oil agent applying means 7a and 7b having the oil supply guides to the respective yarns Ya and Yb, the yarns are mixed and mixed using a tangled nozzle using compressed air, etc. It is done by winding it as a yarn.

  In such cospun spinning, an embodiment as illustrated in FIG. 2 occurs. That is, an oil agent applying means 7a for applying an oil agent to the yarn Ya spun from one of the caps 2a is provided directly below the blowout surface 4 of the cooling air, and a yarn suction means 8 for performing a yarn breaking process. The yarn applying means 7a is provided upstream of the yarn cutting means 9 and the yarn converging member 10, and the yarn Yb spun from the other base 2b is similar to the prior art illustrated in FIG. An oil agent applying means 7 b is provided below the lower end of the lower spinning cylinder 5, and the oil agent applying means 7 b is provided downstream of the yarn suction means 8, the yarn cutting means 9 and the yarn converging member 10 for performing the yarn breaking process. This is the case.

  In the embodiment as shown in FIG. 2, the oil agent application means on the side for applying the oil agent to the yarn Yb is not a problem during the yarn breaking process as in the prior art illustrated in FIG. 4. For only the oil agent applying means 7a for applying the oil agent, as in the embodiment of FIG. 1, the yarn removing member 12, the yarn removing member driving actuator 13, the yarn path regulating guide 14 and the yarn path regulating guide are arranged in the vertical direction. What is necessary is just to set it as the structure which provides the thread | yarn removal means comprised including the actuator 15 for a drive. And in such a case, by setting it as an apparatus structure illustrated in FIG. 2, the phenomenon that the thread | yarn cut | disconnected by the oil agent provision means 7a can be avoided.

  Finally, the embodiment illustrated in FIG. 3 will be described. In this embodiment, the cooling distance between the two co-spun yarns Ya and Yb is shortened, and the oil agent applying means 7a for applying an oil agent to the yarn Ya spun from one of the bases 2a is provided with cooling air. The yarn Yb spun from the other nozzle 2b and spun from the other nozzle 2b is provided at a position directly below the cooling air outlet 4 as in the embodiment of FIG. In such a case, the thread removing members 12a and 12b, the thread removing member driving actuators 13a and 13b, the yarn path regulating guides 14a and 14b, and the thread path regulating guide are respectively provided above and below the oil agent applying means 7a and 7b. What is necessary is just to set it as the structure which provides the 2 sets of thread | yarn removal means comprised including the actuators 15a and 15b for driving, respectively.

  Then, when the yarn Y is cut when performing the yarn breaking process, the yarn path on which each yarn Ya and Yb travels from the oil agent applying means 7a and 7b to which the already cut yarn is entangled. It has been removed. For this reason, the situation that the cut yarn is entangled with these oil agent applying means 7a and 7b can be avoided, and the suction mistake that the cut yarn is not sucked by the yarn suction means 8 can be greatly reduced. Threading work is greatly improved.

  The yarn breakage treatment apparatus of the present invention enables smooth and quick yarn breakage when a yarn breakage occurs in the melt spinning process of thermoplastic synthetic fibers such as nylon and polyester, and the oiling means is provided upstream of the spinning cylinder. In particular, it can be suitably used in a melt spinning apparatus or a cospun spinning apparatus for multifilament yarns having a single fiber fineness of 2 dtex or less.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic apparatus block diagram containing the melt spinning apparatus typically illustrated in order to demonstrate embodiment of the yarn breakage processing apparatus of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic apparatus block diagram including the cospun spinning apparatus typically illustrated, respectively, in order to explain one embodiment when the yarn breakage treatment apparatus of the present invention is applied to the cospun spinning process. It is a schematic apparatus block diagram including the cospun spinning apparatus typically illustrated in order to explain other embodiment examples when the yarn breakage treatment apparatus of the present invention is applied to the cospun spinning process. It is a schematic diagram explaining embodiment of the conventional yarn breakage processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spin block 2 Spinneret 3 Upper spinning cylinder 4 Cooling-air blowing surface 5 Lower spinning cylinder 6 Cooling-air supply part 7 Oil supply means 8 Yarn suction means 9 Yarn cutting means 10 Yarn focusing member 11 Yarn focusing member drive Actuator 12 Yarn removal member 13 Actuator for driving yarn removal member 14 Yarn path regulation guide 15 Actuator for driving thread path regulation guide Y Yarn

Claims (6)

A yarn breakage treatment apparatus provided in a melt spinning apparatus having at least an oil agent applying means provided in a spinning cylinder for cooling a plurality of multifilament yarns made of spun thermoplastic synthetic fibers,
The yarn breakage processing device is configured to separate the yarn traveling by the yarn breakage detection signal from the yarn breakage detection unit from the oil agent applying unit, and to detect that the yarn has been broken. A yarn breakage treatment device comprising a yarn removal means.   A yarn suction means, a yarn cutting means provided immediately below the yarn suction means, and a plurality of the yarns to the yarn suction position of the yarn suction means at the downstream portion of the oil supply means. The yarn breakage processing device according to claim 1, wherein the yarn converging means for converging is provided in this order along the yarn traveling direction.   The yarn breakage processing apparatus according to claim 2, wherein the yarn suction unit, the yarn cutting unit, and the yarn converging unit are provided on the downstream side of the lower end of the spinning cylinder.   The yarn removing means includes a yarn removing member and a yarn path regulating guide that are movable forward and backward in the running direction of the yarn and are respectively provided above and below the oil agent applying means, and further detecting the yarn breakage. The yarn breakage processing apparatus according to any one of claims 1 to 3, further comprising an actuator that moves the yarn removal member and the yarn path regulating guide in a yarn removal direction in response to a yarn breakage detection signal from the means.   The yarn breakage treatment apparatus according to any one of claims 1 to 4, which is applied to a melt spinning apparatus for spinning a multifilament yarn having a single fiber fineness of 2 dtex or less.   The yarn according to any one of claims 1 to 5, wherein the yarn is applied to a cospun spinning device that spins yarns composed of two or more types of thermoplastic synthetic fibers having different solidification points, and combines and mixes the yarns. Thread breaker.

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