JPS61146825A - Production of spun yarn by high-speed spinning machine - Google Patents

Abstract

PURPOSE:To prevent the winding of defect parts in a cheese, by cutting a spun yarn on sensing yarn defects with a sensor, calling a yarn ending machine thereto, ending the yarn, and restarting the winding of the cheese. CONSTITUTION:A yarn cutter 9 and a yarn defect sensor 10 are provided in each spindle of a spinning machine having a drafting part consisting of rolls 1-3, yarn forming part consisting of conveyor bands 4 and false twisting nozzle 6, pneumatic device 5, delivery rolls 7 and cheese winding part. When the sensor 10 senses a yarn defect, e.g. slub or nep, the yarn cutter 9 is operated to cut a spun yarn. The pneumatic device 5 is operated almost simultaneously therewith to suck and remove the spun yarn. A yarn ending machine 12 is then called thereto and made to carry out yarn ending.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing spun yarn using a high-speed spinning machine.

In particular, the yarn spinning speed is 100 m/min or more, which is 5 to 10 times faster than conventional ring spinning, and can be effectively employed in the operation of temporary twist spinning, which uses compressed air. This invention relates to a method for producing spun yarn using a spinning machine.

(Prior art) Innovative spinning methods such as the open-end method, alternate twist method, temporary twist method, etc. have been developed. These are rings,
By not using a rolling mechanism such as a traveler, it is possible to increase the spinning speed by 2 to 10 times compared to conventional ring spinning, and there is an actual industrial advantage in that it can be directly wound into a cheese shape. It is something. In particular, in the case of the temporary twist spinning method that uses compressed air as described above, the spinning speed and speed are even faster, and these advantages can be fully utilized, and in recent years, it has been attracting attention in the industry. It has become a thing.

(Problems to be solved by the invention) However, in the case of innovative spinning as described above, in particular,
In the case of tentative twist spinning, a supplied staple fiber bundle such as a sliver is drafted by a roller draft mechanism, and although there are some differences in various specific plate twist spinning systems, roller drafting is more or less performed in this way. Due to the nature of spinning, in which a temporary twist is imparted to a miscellaneous bundle of 41 staple fibers, and the kneading-decomposition action is used to form yarn, the spun yarn inevitably has defects such as slubs and neps. remains, and in order to remove these, the yarn wound into a cheese shape must be rewinded.In this respect, it can be said that there is no particular difference from the manufacture of spun yarn by the conventional ring spinning method. These yarn defects are generally small, ranging from 0.1 to a few per kilogram of yarn, but they usually require rewinding to remove them, which requires labor and a rewinding device. This increases the cost and also causes neps to occur due to squeezing with the thread guide. In addition, the generation of neps in this rewinding process is a problem that needs to be solved, and rewinding at high speeds increases the generation of neps. The necessity of rewinding with a large number of spindles must be said to be contrary to the original idea of innovation spinning, which is to obtain high productivity at low cost.

The present invention eliminates the need to remove defects through such a rewinding process, and enables the yarn spun at high speed and wound around cheese to be shipped as a product as it is, and can also be used to produce products such as slabs and neps as described above. Even when removing yarn defects such as, there are fewer process troubles and less yarn waste is generated, and overall extremely high productivity and operability can be achieved, and the performance of the high-speed spinning machine can be improved to its original level. It is an object of the present invention to provide a method for producing spun yarn using a high-speed spinning machine, which is capable of fully achieving the goal of low cost.

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

That is, when manufacturing spun yarn using a spinning machine consisting of a draft section, a yarn forming section, and a cheese winding section, there is a yarn defect sensing device and a yarn cutting device that operates when the yarn defect sensing device senses a yarn defect. A high-speed spinning machine, characterized in that a mechanism is provided on each weight, and after cutting the spun yarn of the weight with yarn defects, the supply of sliver to the yarn forming section of the weight is stopped. This is a method for producing spun yarn.

(Function) Hereinafter, a method for producing spun yarn using a high-speed spinning machine according to the present invention will be explained with reference to the attached drawings.

The figure shows an example of a spinning spinning machine as an example of a high-speed spinning machine that can be suitably used when carrying out the method for producing spun yarn of the present invention, and is one embodiment of the spinning spinning method. This figure shows a high-speed temporary twist spinning machine that adopts a yarn forming method in which a conveyor band and a temporary twist nozzle are installed downstream of a draft device.

In the figure, the spun yarn formed by the draft section by rollers 1, 2, 3 and the yarn forming section consisting of the conveyor band 4, pneumatic material 5, and temporary twist nozzle 6 is pulled out by the delivery roller 7 and wound around the cheese 8.

Here, in the method for producing spun yarn according to the present invention, the yarn cutter 9
A yarn defect sensing device 10 is provided, and when a yarn defect such as a slub or nep is mixed or generated in the spun yarn, the yarn is cut at that portion.

To explain this using the device shown in the figure, in a normal spinning state, when a yarn defect passes through the sensing device 10, the yarn cutter 9
substantially immediately cuts the spun yarn, and the yarn emerging from the nozzle is sucked into the new 711.

Here, the yarn cutting mechanism is not the yarn cutter shown in the figure, but may be such that the yarn spinning is immediately stopped by stopping the air pressure of the nozzle 6, and the staples drafted by the pneumonia 5 are sucked.

After the yarn is cut, the yarn defect sensing device 1
0, the sliver cutter (not shown) or the back roller 3 is stopped to stop the supply of sliver to the yarn forming section of the weight where the yarn defect has occurred. Due to this structure, less yarn waste is generated between yarn cutting and yarn splicing. To stop the supply of such stable raw materials, specifically, the apparatus described in Japanese Patent Application Laid-Open No. 149934/1984 may be appropriately employed.

In the method of the present invention, by splicing the yarn, the defect-free yarn can be wound up as cheese and shipped as is as a product.

' That is, the yarn splicing machine 12 is called by a yarn defect occurrence signal etc. from the yarn defect sensing device 10, and the yarn splicing machine 12 is activated.
The yarn being sucked by the pneuminator 11 is passed through the delivery roller, the yarn end on the cheese side is taken out, the part containing the defect is removed, and each yarn end is tied to resume normal spinning. The yarn piecing machine has a reserve device for the yarn coming out from the delivery roller during yarn piecing, and the slack in the yarn in the reserve device can be absorbed by rotating the cheese at high speed.

In addition, the back roller 3 is directly activated by sensing yarn defects.
Although it is possible to consider a method of stopping the system, such a method is not necessarily preferable.

That is, in this method, the back roller 3 is stopped after sensing a slab or the like, so while the sliver between the back roller 3 and the front roller 1 comes out as yarn, yarn spinning continues, and the invasion is prevented. , the thread can be cut. Therefore, since the yarn continues on the winding cheese even after the slab, etc., 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 preferable. It's something that doesn't exist. Further, in this method, since the thread gradually becomes thinner before being cut, the end of the thread on the cheese side becomes very thin, and there is also the disadvantage that it is difficult for the thread piecing machine to take out the thread end.

On the other hand, in the method of the present invention, the cutter
Or, in order to cut the spun yarn immediately by stopping the air pressure to the nozzle, the yarn length following a yarn defect such as a slub is substantially the yarn length from the sensing device to the yarn cutting mechanism, which is e.g. In general, it is up to about 1 meter, so the loss is small. Furthermore, the yarn end on the cheese side is also thick, making it easy for the yarn splicing machine to grasp the yarn end, thereby reducing failures during yarn splicing and quickly resuming normal spinning. It is effective.

From this point of view, the method for producing spun yarn using a high-speed spinning frame of the present invention is an overall method that can reduce the time loss required for removing and repairing yarn defects and failures in splicing operations when yarn defects occur. It is an extremely rational method, and originally it combines the high-speed performance of high-speed spinning machines and the splicing performance of splicing machines.
Each of these can be fully utilized, making it possible to produce spun yarns and making it possible to produce them at low cost.

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

The above has described a spinning machine that uses a temporary twisting nozzle that blows out in the yarn running direction, but the present invention is not limited to this, and can also be applied to open-end machines and alternate twisting machines. The cutting mechanism, pneumatics, etc. may be installed at optimal positions according to each method, and the method of the present invention may be carried out.

Of course, the yarn defect sensing device and the yarn splicing device can be used not only to operate when a yarn defect passes, but also to detect yarn breakage and to start re-spinning yarn breakage.

(Effects of the Invention) In order to implement the method for producing spun yarn using the high-speed spinning machine of the present invention as described above, the price per tsubo of the device will inevitably be high, but the spinning speed will be particularly high. 100m
If the spinning machine originally has high productivity such as 1/min or more, producing spun yarn according to the method of the present invention eliminates the need for a rewinding process, which is advantageous in terms of cost. Moreover, since the rolled cheese can be used as a product as it is, the advantages of high-speed spinning machines can be fully utilized.

[Brief explanation of drawings]

The figure shows an example of a spinning spinning machine as an example of a high-speed spinning machine that can be suitably used when carrying out the method for producing spun yarn of the present invention. As an embodiment, a high-speed temporary twist spinning machine is shown which employs a yarn forming method in which a conveyor band and a temporary twist nozzle are provided downstream of a draft device. 4: Conveyor band 6: Temporary twist nozzle 9: Yarn cutter 10: Yarn defect detection device 11: 21-7 12: Yarn splicing machine

Claims (3)

[Claims] (1) When manufacturing spun yarn using a spinning machine consisting of a draft section, a yarn forming section, and a cheese winding section, a yarn defect sensing device and a yarn activated when the yarn defect sensing device senses a yarn defect. A high-speed spinning machine, characterized in that a cutting mechanism is provided on each spindle, and after cutting the spun yarn of a spindle that has a yarn defect, the supply of sliver to the yarn forming section of the spindle is stopped. A method for producing spun yarn. (2) A method for producing spun yarn using a high-speed spinning machine according to claim (1), wherein the spinning speed in the yarn forming section is 100 m/min or more. (3) The high-speed spinning method according to claim 1 or 2, wherein the yarn forming section is a yarn forming section using a temporary twist spinning method using an air temporary twist nozzle. A method for producing spun yarn using a spinning machine.