JPH0726247B2 - Method and device for cutting and sucking yarn in high-speed yarn production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a method capable of collectively and reliably cutting and sucking a plurality of yarns traveling at high speed, particularly 4000 m / min or more, and a method therefor. It relates to the device.

[Prior Art] When a thermoplastic fiber such as polyamito or polyester is spun, the melt-spun yarn is usually cooled and oiled, and then passed through a take-up roll, a drawing roll, etc., and then a winding machine. It is wound up (Fig. 6). In such a spinning process, the spinning speed has recently been further increased, and a high-speed spinning method of winding at a speed of 4000 m / min or more is becoming widespread industrially.

On the other hand, as one of the peripheral techniques necessary for industrially performing yarn production, there is a technique of cutting a running yarn and sucking it in order to interrupt the yarn production, and various devices and methods have been proposed. As one of the yarn cutting / sucking methods, the traveling yarn is locked by moving it up to the position of the yarn suction device / yarn cutter fixed to one side of the traveling yarn, and then the yarn JP-A-56-9416 discloses a method in which the yarn is cut by the operation of a cutter, the upstream yarn is sucked by a suction device, and the downstream yarn is wound by a winder (Fig. 7). It has been proposed in.

This method is extremely effective as a method for cutting and sucking a plurality of yarns at a time and can be applied to a relatively high speed, but the yarn running speed has been further increased in multi-yarn yarn making. Or, if the number of yarns increases, such as 4 yarns or 8 yarns, the abrasion at the bending point of the traveling yarns by the yarn guides at the time of yarn pulling becomes significantly large. If the tension of the yarn decreases or the running condition becomes unstable due to tarmi, etc., problems such as winding of the upstream yarn around the oil agent applying device, or failure to suck the upstream yarn after cutting the yarn may occur. This may occur, and the yarn cutting and suction processing may not be performed smoothly. In particular, when the suction operation by the yarn suction device is started at the same time as the yarn pulling operation, the suction flow acts on the yarn pulling yarn to further promote the destabilization of the traveling state and increase troubles.

[Problems to be Solved by the Invention] Therefore, according to the present invention, a process of spinning at a high speed of 4000 m / min or more,
Or even in the process of making multiple yarns with 4 or more yarns,
A main object of the present invention is to provide a method and an apparatus capable of collectively and reliably cutting and suctioning a plurality of traveling yarns.

In addition, the present invention is a yarn suction cutting process particularly suitable for a yarn making process of fibers that are easily affected by rubbing by guides and airflow, such as when the running yarn has a single yarn fineness of 3 denier or less. It is another object to provide a method and its apparatus.

[Means for Solving the Problems] In order to achieve this object, according to the present invention, when a plurality of yarns Y _{1 to} Yn running at high speed are collectively cut and sucked, the plurality of yarns are A yarn cutting / sucking device 1, 2 provided near the central portion A of the yarn path from both outsides in the direction in which the yarns are aligned and provided at a position near the central portion of the yarn path so as not to come into contact with the traveling yarn. , And to the position of the thread deposit guide 3, the plurality of yarns are collectively pulled together, the plurality of yarns are collectively locked to the yarn deposit guide 3, and then the two types of yarn aligners are swiftly moved. Both of the yarn pulling members used for 4,4 ′, 5,5 ′, 6,
6 ′ is returned to the original position and the yarn cutting / suction processing method for operating the yarn cutting / suction processing device is performed, and the yarn cutting / suction processing method in high-speed yarn production; and the yarn near the central portion of the yarn path of a plurality of yarns A yarn suction device 1 and a yarn cutter 2 which are sequentially provided at positions not in contact with the yarn along the yarn traveling direction.
And a yarn depositing guide 3 for collectively locking a plurality of yarns, a yarn shifting plate 4 movable in a direction in which yarn paths of the plurality of yarns are arranged,
4 ', 5, 5', and thread shifting guides 6, 6'movable in a direction of approaching and separating from the thread deposit guide in the vicinity of the central portion of the yarn path of the plurality of yarns, and Yarn cutting by a plate and a yarn drawing guide, batch locking of a plurality of yarns by the yarn depositing guide, and further, the yarn cutting for high-speed yarn production that operates in the order of returning the position of the yarn drawing plate and the yarn drawing guide and cutting the yarn. It consists of suction processing.

Hereinafter, first to sixth examples illustrating the method and the device according to the present invention
A description will be given along the figure (schematic diagram).

FIG. 1 is a plan view showing the progress of thread shifting when carrying out the method of the present invention. 2 (a) to (c) are front views showing a state before thread shifting, a state in which a plurality of yarns are locked in the yarn depositing guide, and a state at the time of cutting the yarns, respectively. Third
(A), (b) is a right side view which respectively shows the state at the time of thread pulling guide before a thread pulling, and when a thread is cut | disconnected by making a thread deposit guide. FIGS. 4 (a) and 4 (b) show the operation of the yarn pulling guide and show the time before the yarn pulling guide is actuated and the time when the yarn pulling guide locks the yarn on the yarn depositing guide, respectively. It is a partially expanded top view.

FIGS. 5A to 5C are enlarged views of the grooved side cap-shaped member of the yarn suction device, and are a front view, a right side view, and a perspective view, respectively.

FIGS. 6 (a) and 6 (b) exemplify the steps for performing the thread-cutting suction process, and are a schematic front view and a yarn showing the case where the thread-cutting processing is performed before the take-up roller in the thread-making process, respectively. It is a partial right side view of the winding part vicinity.

As shown in FIGS. 2 (a) and 3 (a), the traveling yarn shapes Y _{1 to} Yn (illustrated in the case of 4 yarns) before the yarn cutting and suction processing are paired with the upper yarn shifting plates. 4, 4 ', then the front surfaces of the yarn suction device 1, the yarn cutter 2, and the yarn depositing guide 3, and then between the pair of lower yarn shifting plates 5, 5'. It runs without passing and then passes through the yarn guide regulation guide 7.

Then, the cutting and suctioning process of the running yarn is performed in the following order.

First, the upper and lower thread shifting plates 4, 4 ', 5, 5'are the first
Actuated by the reciprocating cylinder 14, a plurality of yarns Y _{1 to} Yn
Is moved to the approximate center of the yarn path (A in FIG. 1). Then, the yarn reciprocating cylinder 6 operates by the second reciprocating cylinder 15 to bundle the reciprocating yarns in a direction approaching the yarn depositing guide 3 and bundle the plurality of yarns into the yarn depositing guide 3. (FIG. 1B, FIG. 2B and FIG. 3B). At this time, the plurality of yarns pulled up by the yarns are gathered on the hooks 16 of the yarn depositing guide 3 and are slid and guided along the inclined portions 17 of the yarn deposit guides 3 to be locked. The yarn suction device 1 is inserted into the yarn collecting groove 11. At this time, the yarn path is sandwiched between the upper and lower yarn shifting plates 4, 4 ', 5, 5'as shown in FIG. 2 (b), and the groove 11 of the yarn suction device, the concave portion of the yarn cutter 2, the yarn guiding guide. It is in a state of being inserted in the hook portions 16 of 6, 6 '.

After this, the yarn pulling plate and the yarn pulling guide are promptly returned to the original position, that is, the position where the traveling yarns do not come into contact with each other (Fig. 2 (c)). At the same time as or after this return, the yarn suction device 1 and the yarn cutter 2 are operated,
Cut the yarn and suck the upstream yarn.

At the time when the yarn pulling plate and the yarn pulling guide are returned to be in a state of non-contact with the yarns, as shown in FIG. 2 (c), the plural yarns are bundled in the groove 11 of the yarn suction device. Then, the concave portion of the yarn cutter 2 and the hook portion 16 of the yarn depositing guide
Drive through.

The series of processes described above may be performed in association with yarn breakage in the process, or may be performed in order to interrupt the process due to other troubles or the like.

For example, in the yarn manufacturing process shown in FIG. 6, when a yarn breakage occurs due to some cause, the yarn breakage yarn is wound around the take-up roll 8 and the drawing roll 9, and the yarn runs to the winder 10. Since the thread breakage is lost, the thread breakage sensors S _{1 to} Sn installed in front of the winder detect the thread breakage. A signal is transmitted from the yarn break sensor corresponding to the yarn in which the yarn break has occurred, is transmitted to the sequence of the yarn cutting suction processing devices 1 and 2, and the above processing is started.

In the above-mentioned processing, the yarn pulling operation can be performed by the yarn pulling members provided on both the upstream side and the downstream side of the yarn cutting and suction processing device, so that a plurality of yarns can be collectively and quickly delivered to the yarn depositing guide 3. Preferred for locking.

In addition, the yarn pulling plate is arranged such that the yarn pulling plates 4, 4 ', 5, 5'movable in the direction in which the yarn paths of the plurality of yarns are arranged and the central portion of the yarn routes of the plural yarns are brought into contact with or separated from the yarn depositing guide. It is preferable to use the yarn pulling guides 6 and 6'which are movable in the direction.
At this time, when the yarn pulling plate has finished moving to the vicinity of the central portion, it does not hinder the running of the yarn pulled yarn between the left and right pair (4, 4'or 5,5 '). Further, it has a slit width narrow enough to enable collective locking by the yarn pulling guide, for example, a slit having a width of about 1 to 2 mm.

Further, the yarn suction side of the yarn suction device 1 has a structure in which the yarn collecting groove 11 having a wide upstream side and the yarn suction port 12 opening to the groove are used for the yarn pulling. It is preferable for stabilizing the traveling of the plurality of yarns in the operating position of the yarn suction device even after the member is returned. Such a structure has a yarn concentrating groove 11 and a yarn suction port 12 of the above-mentioned specific shape,
It is preferable that a side cap-shaped member (FIG. 5) formed of a material that does not damage the yarn traveling in contact be separately prepared and provided by being attached to the suction side of the yarn suction device. The shape on the suction side may be formed into the grooved shape as described above. Further, the yarn collecting groove can be substituted by providing another yarn depositing guide near the yarn suction device 1, for example, near the upstream side (not shown).

Furthermore, the operation of the yarn cutting suction processing device is performed by the suction of the yarn suction device and the yarn cutting operation. This yarn cutting operation can be performed at the same time as the start of suction or within 2 seconds after that. It is preferable to eliminate the adverse effect of the suction flow on the stability of yarn running.

A commonly used suction gun or the like may be used as the yarn suction device 1, and a cylinder type or rotor type cutter is preferably used as the yarn cutter 2.

It is preferable that the upper yarn pulling plates 4 and 4 ′ are provided above the yarn suction device 1 and the lower yarn pulling plates 5 and 5 ′ are below the yarn depositing guide 3.
For example, it is preferable that they are separated by about 50 to 100 mm. Further, it is preferable that the yarn depositing guide 3 is below the yarn cutter 2 and is, for example, below 30 to 60 mm. Furthermore, the distance between the yarn cutter 2 and the yarn suction device 1 is preferably about 60 to 150 mm.

[Operation] As described above, in the present invention, the yarn cutting and suction processing devices 1 and 2 for collectively treating the yarns are provided in the vicinity of the central portion of the yarn path of the plurality of yarns at a position where the traveling yarns are not contacted. Since the yarns are brought close to the central portion of the lever, the bending angle of each yarn at the time of yarn pulling can be minimized even when the number of yarns is increased.

In addition, since the member used for threading is quickly returned to the original position after the completion of threading, and suction is started and yarn is cut at the same time as or after this returning, the threading member (threading plate or threading guide). It is possible to minimize the time to receive the bending due to, and to minimize the number of guide contacts.

Both of these actions work together to prevent problems caused by rubbing by the yarn pulling member immediately before yarn sucking, and therefore, the yarn is much more stable and reliable than the conventional method. Processing becomes possible.

[Example] In a process of high-speed spinning of a nylon 6 yarn of 70 denier and 24 filaments with a yarn number of 4, a cutting and suction treatment test (1 month) of a yarn running at 4500 m / min was conducted according to the present invention (first 1
.About.6) or the conventional method (FIG. 7).

As a result, in the case of the conventional method, the treatment success rate was extremely low at 10%, but according to the present invention, the treatment success rate could be increased to 92%.

[Effects of the Invention] As described above, according to the present invention, even in the step of spinning at a high speed of 4000 m / min or more, or in the step of spinning a multi-spinning yarn with four or more yarns, a plurality of running yarns can be collectively and reliably discharged. It can be cut and sucked easily.

Further, according to the present invention, even in the fiber manufacturing process of fibers that are easily affected by rubbing by guides and airflow, as in the case where the single yarn fineness of the traveling yarn is relatively thin, the yarn cutting and suction processing can be performed reliably and quickly. It can be carried out.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to batch cutting and suction processing of yarns in a process of simultaneously producing or after-processing a plurality of yarns, but in particular, multi-filament high-speed yarn forming of polyamide or polyester fibers (basically, melting It is effective as a batch cutting suction treatment of a plurality of yarns in a method of drawing a spun multi-filament at a high speed and drawing or winding without drawing.

[Brief description of drawings]

1 to 6 show one embodiment of the method and apparatus according to the present invention, and FIG. 1 is a plan view showing the progress of the yarn pulling when the method of the present invention is carried out. Fig. 2 (a) ~
FIG. 6C is a right side view showing a state before the yarn pulling, a time when the plural yarns are locked in the yarn depositing guide, and a state when the yarns are cut. FIGS. 3 (a) and 3 (b) are front views showing a state before thread shifting and a state when a plurality of yarns are locked in the yarn depositing guide and the yarns are cut. FIGS. 4 (a) and 4 (b) show the operation of the yarn pulling guide and show the time before the yarn pulling guide is actuated and the time when the yarn pulling guide locks the yarn on the yarn depositing guide, respectively. It is a partially expanded top view. FIGS. 5A to 5C are enlarged views of the grooved side cap-shaped member of the yarn suction device, and are a front view, a right side view, and a perspective view, respectively. FIGS. 6 (a) and 6 (b) exemplify a process of performing a thread-cutting suction process, and are schematic front views showing a case of performing a thread-cutting process before a take-up roller in a yarn-making process, respectively. It is a partial right side view of the strip winding part vicinity. FIG. 7 is a schematic view showing a conventional multi-thread cutting suction method. [Explanation of reference symbols] 1: yarn suction device, 2: yarn cutter 3: yarn depositing guide 4,4 ′: upper yarn pulling plate 5,5 ′: lower yarn pulling plate 6,6 ′: yarn pulling guide 7: Thread guide guide, 8: Take-up roll 9: Stretching roll, 10: Winding machine 11: Yarn focusing groove of yarn suction device 12: Yarn suction port of yarn suction device 13: Yarn suction Side cap-shaped member with groove 14 of the device: 1st reciprocating cylinder 15: 2nd reciprocating cylinder 16: Hook part of thread pulling guide 17: Inclined part of thread pulling guide Y ₁ ~ Yn: Travel yarn S ₁ ~ Sn: Each Thread breakage sensor for each yarn A: Position of the yarn when the yarn is pulled near the center of the yarn path of multiple yarns B: Position of the yarn when locked to the yarn deposit guide

Claims (5)

[Claims] 1. When a plurality of yarns traveling at high speed are collectively cut and sucked, the plurality of yarns are moved from both outsides in the direction of arrangement of the yarn passages to the vicinity of the central portion of the yarn passages. At the same time, the plurality of yarns are collectively pulled up to the position of the yarn cutting / suction processing device and the yarn depositing guide which are provided in the vicinity of the central portion of the yarn path so as not to come into contact with the traveling yarns. The yarns are collectively locked to the yarn deposit guide, and then both of the yarn pulling members used for the two types of yarn pulling are quickly returned to their original positions, and the yarn cutting suction processing device is operated. A method for cutting and suctioning a yarn in high-speed yarn production, which comprises: 2. The high speed according to claim 1, wherein the yarn pulling is performed by a yarn pulling member provided on both the upstream side and the downstream side of the yarn cutting and suction processing device. A method for cutting and suctioning yarns in yarn making. 3. The yarn cutting suction processing device is operated by starting the suction of the yarn sucking device and at the same time as the start of the suction or by a yarn cutting operation within 2 seconds thereafter. A method for cutting and sucking a yarn in high-speed yarn production according to claim 1. 4. A yarn suction device, a yarn cutter, and a plurality of yarns, which are provided in the vicinity of a central portion of a yarn path of a plurality of yarns and in a position not contacting the yarns, in order along the yarn traveling direction. A thread deposit guide for locking the threads together; a thread shifting plate movable in the direction in which the yarn paths of the plurality of threads are aligned; and a direction in which the vicinity of the central portion of the thread paths of the plurality of threads is brought into contact with or separated from the thread deposit guide. A thread shifting guide that is movable, a thread shifting by the thread shifting plate and the thread shifting guide, a collective locking of a plurality of yarns in the thread depositing guide, and a thread shifting by the thread shifting plate and the thread shifting guide. A yarn cutting suction processing device for high-speed yarn production, which is operated in the order of position return and yarn cutting. 5. The yarn suction device, on the yarn suction side thereof,
A yarn cutting and suctioning process for high-speed yarn production according to claim 4, characterized in that the device has a structure having a wide yarn collecting groove on the upstream side and a yarn sucking port opened to the groove. apparatus.