JPS6363651B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a high-speed spinning machine having a yarn forming section and a cheese winding section that utilize a temporary twisting mechanism using a compressed air nozzle or the like.

(Prior art) Innovative spinning methods such as the open-end method, alternate twist method, temporary twist method, etc. have been developed.

Since these do not use rings or travelers, the spinning speed can be increased 2 to 10 times that of conventional ring spinning, and they can be wound into a cheese shape. In particular, innovative spinning methods such as the alternate twisting method and temporary twisting method, in which a compressed air nozzle or the like is used as a twisting mechanism, achieve high-speed spinning that is approximately 5 to 10 times faster than conventional ring spinning or more. The industrial value is extremely high.

However, these high-speed spinning methods involve drafting a supplied staple fiber bundle such as a sliver with a roller draft mechanism, and although there are some differences in various specific spinning systems, the roller draft mechanism Due to the nature of spinning, in which a fiber bundle consisting of staple fibers is subjected to temporary twisting and the twisting and unrolling action is used to form yarn, the spun yarn inevitably has yarn defects such as slubs and neps. However, in order to remove these, the thread that has been wound into a cheese shape must be rewinded (rewinded). It can be said that there is no particular difference from the manufacturing method.

On the other hand, related to the above-mentioned yarn defect removal technique, there is yarn defect removal using an open-end spinning method, which is described in Japanese Patent Publication No. 35616/1983. However, in this method, when a yarn defect is detected, the blowing of the supplied fibers to the rotating spinning chamber of the open-end spinning machine is stopped. Even after the defect, the spun yarn gradually becomes thinner and is wound until there are no fibers left completely, so when the splicing machine performs the splicing operation, the cheese side yarn is removed to the slab, etc. In addition, since the yarn gradually becomes thinner and breaks, the end of the yarn on the cheese side becomes very thin, making it difficult for the splicing machine to take out the yarn end, which reduces the performance of the splicing machine. There is the inconvenience of not being able to perform to your full potential.
It was still insufficient in terms of high productivity, labor saving/automation, and low cost. In particular, in addition, the method described in the publication takes the following steps: ``detecting yarn defects,'' ``stopping air blowing to the rotating spinning chamber,'' and removing remaining yarn upstream of the take-up roller by suction. In such a system, no consideration is given to the treatment of the sliver remaining in the draft section, and if only the air blowing of the fiber were to be stopped under such a system, problems such as roller wrapping would occur frequently. However, automated thread splicing would be completely impossible.

(Problems to be Solved by the Invention) Temporary twisting is applied to a fiber bundle made of roller-drafted staple fibers as described above,
In a spinning system that utilizes the addition and degeneration effect for yarn formation, yarn defects generally occur in the yarn 1, although there are some differences depending on the specific spinning system.
The number is about 0.1 to several pieces per kg, which is not necessarily a large number, but it usually requires rewinding to remove yarn defects, which requires labor and a rewinding device, which increases costs. .

In addition, the rewinding process itself for removing yarn defects is also a factor in the generation of new neps due to the straining of the yarn with the guide.

The generation of new neps in such a rewinding process is a problem that must be solved, and when rewinding at high speed, the yarn structure of the tentatively spun yarn generally forms on the outer periphery of the core fiber bundle which is substantially untwisted. In addition to the unique yarn structure factor in that the yarn only becomes strong when a small number of staple fibers are wrapped around each other, the occurrence of neps increases even more. It also includes other problems.

In order to avoid such problems, it is necessary to rewind the spun yarn, which was originally spun at a high speed and at a low speed, using many weights and manpower, instead of setting the rewind speed to a high speed. It must be said that the fact that this is not the case also contradicts and goes against the original idea of achieving high productivity at low cost in innovative spinning as mentioned above.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is based on the technical idea of combining a spinning machine and a rewinder to remove yarn defects on a spinning machine. It is an object of the present invention to provide a high-speed spinning machine that does not actually require the removal of defects by rewinding and can make it possible to ship yarn spun at high speed and wound around cheese as it is as a product.

Furthermore, it is an object of the present invention to provide a rational and high-yield method for processing and re-spinning the continuously supplied fibers when removing yarn defects due to yarn cutting, without causing any inconvenience in terms of operability. The objective is to provide a high-speed spinning machine that can effectively achieve the intended objectives of speed, labor saving/automation, and low cost. In other words, even though the yarn defects have been removed, it is still a useful and perfect high-speed spinning machine if it requires a great deal of manpower or results in a long loss of time when resuming normal operations on the spindle. There isn't. In other words, for example, the aforementioned special public interest in open-end spinning
The technique described in the -35616 publication, as in the present invention described later, has the disadvantage that when the yarn is cut with a cutter, the fibers drafted into the rotary spinning chamber accumulate, making it impossible to splice the yarn.
When the air blowing is stopped, the drafted fibers have no destination and have no choice but to wind around the rollers, which is a disadvantage in terms of operation.
Generally, in open-end spinning, the spinning speed is at most 20
~30m/min, so it can be said that there is little actual damage in terms of operation, but when it comes to high-speed spinning, where the spinning speed exceeds 100m/min, optimal measures are needed from both productivity and operability points of view. The present invention provides a high-speed spinning machine which does not have such operational inconveniences, is optimal for realizing automatic yarn splicing, and is constructed with careful consideration.

(Means for Solving the Problems) The present invention, which achieves the above-mentioned objects, has the following configuration.

In other words, in a spinning machine consisting of a roller draft section, a yarn forming section that utilizes a temporary twister and is attached with a newer suction mechanism, a newer provided downstream of the yarn forming section, and a cheese winding section, a slab, A yarn defect detection device that detects yarn defects such as neps; and a sliver supply stop mechanism that stops the supply of sliver to the draft section by stopping draft rollers including a back roller when the yarn defect detection device detects a yarn defect. and a yarn cutting mechanism is provided for each spindle to cut the spun yarn substantially immediately by operating a cutter or by stopping the cutting action of the yarn forming section when the sensing is detected;
After the spun yarn is cut by the yarn cutting mechanism, the staple fibers sent out from the draft section are formed into a yarn by the yarn forming section, spun out, and subjected to suction processing by a newer provided downstream of the yarn forming section, or A high-speed spinning machine, characterized in that the spinning machine is configured so that a pneumatic suction mechanism in a yarn forming section performs suction processing. '', and ``a spinning machine consisting of a roller draft section, a yarn forming section that utilizes a temporary twister and is attached with a pneumatic suction mechanism, a pneumatic roller provided downstream of the yarn forming section, and a cheese winding section. A yarn defect sensing device detects yarn defects such as slabs and nip, and when the yarn defect sensing device detects yarn defects, the supply of sliver to the draft section is stopped by stopping the draft rollers including the cross rollers. A sliver supply stop mechanism and a yarn cutting mechanism for substantially immediately cutting the spun yarn by operating a cutter or by stopping the thread forming section when the above detection is detected are provided for each spindle. After the spun yarn is cut by the yarn cutting mechanism, the staple fibers sent out from the draft section are formed into yarn by the yarn forming section, spun out, and subjected to suction processing by a newer provided downstream of the yarn forming section, or the staple fibers are fed out from the draft section. The yarn is configured such that the staple fiber suction mechanism in the forming section performs suction processing, and after the suction treatment of the staple fibers, the yarn is movably provided on each spindle or between the spindles when re-spinning and winding the yarn. A splicing device connects the yarn pulled out from the yarn forming section with the yarn end of the yarn wound around the cheese, and performs spinning.
A high-speed spinning machine characterized by being configured to restart winding. ”.

(Operations and Examples) The present invention will be described below with reference to Examples shown in the accompanying drawings.

In the figure, the spun yarn formed by the draft part made up of rollers 1, 2, and 3 and the yarn forming part made up of a conveyor band 4, a new material 5, and a temporary twist nozzle 6 is pulled out by a delivery roller 7 and wound around a cheese 8. . Here, in the present invention, a newer 11, a yarn cutter 9, and a defect sensing device 10 are provided at each spindle downstream of the yarn forming section, and when a yarn defect such as a slub or nep is mixed in, the yarn is cut at the part where the defect is mixed, Thereafter, the defects are removed and the yarn is spliced, so that the defect-free yarn is wound up as cheese and can be shipped as is as a product.

To explain the operation of the apparatus of the present invention, in a normal spinning state, when a yarn defect passes through the defect sensing device 10, the yarn cutter 9 cuts the spun yarn substantially immediately, while the spun yarn is subsequently drafted and continued from the draft section. The fed staple is formed into yarn by the temporary twist nozzle 6, and the yarn that comes out from the nozzle is sucked into the needle 11 provided downstream of the yarn forming section.

Next, the yarn splicing machine 12 is called by a signal from the sensing device 10, and the yarn splicing machine 12 passes the yarn sucked by the pneumatic yarn 11 through the delivery roller, and takes out the yarn end on the cheese side and removes any defects in the yarn on the cheese side. After removing the part, the yarn ends of the yarn forming part side yarn and the cheese side yarn are tied together for normal spinning.
Restart winding. The yarn piecing machine has a reserve device for the yarn coming out from the delivery roller during the yarn piecing operation, and slack in the yarn in the reserve device is absorbed by rotating the cheese at high speed.

Here, the yarn cutting mechanism is not the yarn cutter shown in the figure, but by stopping the compressed air of the temporary twisting nozzle 6, the spinning action is stopped and yarn spinning is immediately stopped. After that, the staples that are drafted and sent out from the drafting section may be sucked.
In this case, when re-spinning, compressed air may be supplied again to form a yarn, and the splicing machine 12 may be called in the same manner as described above.

In addition, it is possible to consider a method in which only the defect crawler 3 is directly stopped by sensing a yarn defect.
Such a method is not necessarily preferable. That is, in this method, since the back roller 3 is stopped after sensing a slab or the like, yarn spinning continues while the sliver (staple) between the back roller 3 and the front roller 1 comes out as yarn.
After that, the thread will be cut. Therefore,
In this case, as in the case of the prior art disclosed in Japanese Patent Publication No. 48-35616, the thread continues on the rolled cheese after the slab etc. until it breaks. When the yarn splicing machine performs yarn splicing work, it takes time to remove the yarn on the cheese side to the slab, etc., which is undesirable.In addition, in this method, the yarn gradually becomes thinner. Since the yarn end on the cheese side becomes very thin because it breaks while bending, it is difficult for the yarn splicing machine to take out the yarn end, resulting in the inconvenience that the performance of the yarn splicing machine cannot be fully demonstrated.

In contrast, according to the present invention, the length of yarn following a yarn defect such as a slub is substantially removed from the sensing device due to the fact that the yarn is cut substantially immediately by the cutter or by stopping the air pressure to the nozzle. The length of the thread up to the mechanism is approximately 1 m at most, and the time loss described above is small. Furthermore, the yarn end is also thick, making it easy for the yarn piecing machine to grasp the yarn end.

From this point of view, the device of the present invention can reduce time loss and splicing failures, and can fully utilize the high-speed performance of spinning machines and the splicing performance of splicing machines. be.

The staple fibers sent out from the draft section after the yarn is cut are subjected to suction processing by the newer 11 (or the newer mechanism 5) as described above, and at least the back roller 3
By stopping the draft rollers including
This also stops the supply of sliver to the draft section. In this way, less yarn waste is generated between yarn cutting and yarn splicing.

A yarn splicing device may be provided for each spindle, in which case the waiting time from yarn cutting to yarn splicing is reduced, and the difference in the amount of cheese winding between spindles is reduced.

The above has described a spinning machine using a temporary twisting nozzle that has a blowing effect in the yarn running direction, but the present invention is not essentially limited to this, and can be applied to an alternate twisting machine. cutting mechanism,
The newer is installed in the optimal position depending on each method.

It goes without saying that the yarn defect sensing device and the yarn splicing device can operate not only when the yarn passes through a defect, but also for yarn breakage detection and yarn breakage re-spinning.

(Effects of the Invention) Although the high-speed spinning machine of the present invention explained above has a high price per spindle, it has high functionality by combining the functions of a spinning machine and a rewinder, and the spinning speed can be increased. High productivity of 100 m/min or more eliminates the need for the rewinding process, which is advantageous in terms of cost, and allows the rolled cheese to be made into a product as is, allowing high productivity inherent to high-speed spinning machines. This makes it possible to take full advantage of the advantages such as flexibility and no need for rewind.

According to the present invention, when removing yarn defects, there is no inconvenience in terms of operability such as processing of continuously supplied fibers and re-spinning methods, and it is possible to achieve rational and high productivity, labor saving, automation, A high-speed spinning machine that can fully and effectively achieve the intended purpose of reducing costs has been provided, and is extremely useful in industry.

In addition to the effect of eliminating the need for rewinding, the yarn defect detection and cutting mechanism according to the present invention has the advantage that when used in combination with an automatic yarn splicing machine, the yarn defect detection and cutting mechanism according to the present invention can be used in conjunction with an automatic yarn splicing machine. can be fully exerted, and the overall system can exhibit the above-mentioned great effects even more synergistically.

[Brief explanation of drawings]

The figure is a schematic diagram showing an example of a high-speed spinning machine of the present invention. 4: Conveyor band, 6: Temporary twist nozzle, 9:
Yarn cutter, 10: yarn defect sensing device, 10: yarn defect sensing device, 11: newer, 12: yarn splicing machine.

Claims (1)

[Scope of Claims] 1. A spinning machine consisting of a roller draft section, a yarn forming section that utilizes a temporary twister and is attached with a newer suction mechanism, a newer provided downstream of the yarn forming section, and a cheese winding section. , a yarn defect sensing device detects yarn defects such as slabs and nip, and when the yarn defect sensing device detects a yarn defect, it stops supplying the sliver to the draft section by stopping the draft rollers including the cross rollers. A sliver supply stop mechanism is provided for each spindle, and a yarn cutting mechanism is provided for each spindle to substantially immediately cut the spun yarn by operating a cutter or by stopping a threading action of the yarn forming section when the sensing is detected. After the spun yarn is cut by the yarn cutting mechanism, the staple fibers sent out from the draft section are formed into a yarn by the yarn forming section, spun out, and subjected to suction processing by a newer provided downstream of the yarn forming section, or A high-speed spinning machine, characterized in that the spinning machine is configured so that a pneumatic suction mechanism in a yarn forming section performs suction processing. 2. The high-speed spinning machine according to claim 1, wherein the spinning speed is 100 m/min or more. 3. In a spinning machine consisting of a roller draft section, a yarn forming section that utilizes a temporary twister and is attached with a newer suction mechanism, a newer provided downstream of the yarn forming section, and a cheese winding section, slabs, nets, etc. a yarn defect sensing device that detects yarn defects; a sliver supply stop mechanism that stops the supply of sliver to the draft section by stopping draft rollers including cross rollers when the yarn defect sensing device detects yarn defects; When the above detection is detected, a yarn cutting mechanism is provided for each spindle to cut the spun yarn substantially immediately by operating the cutter or by stopping the cutting action of the yarn forming section, and the spinning by the yarn cutting mechanism is provided. After the yarn is cut, the staple fibers sent out from the draft section are formed into a yarn by a yarn forming section, spun out, and subjected to suction processing by a numa provided downstream of the yarn forming section, or by a numa suction mechanism of the yarn forming section. After the suction treatment of the staple fibers, when re-spinning and winding the yarn, a splicing device movably installed on each spindle or between the spindles is used to splice the yarn. Spinning by tying the thread pulled out from the forming part and the thread end of the thread wrapped around the cheese.
A high-speed spinning machine characterized by being configured to restart winding. 4. The high-speed spinning machine according to claim 3, wherein the spinning speed is 100 m/min or more.