Method and apparatus for producing twisted synthetic yarns

Abstract

The present invention relates to a method and apparatus for producing twisted synthetic yarn, wherein continuous filaments (E) are produced from liquid plastic or granules by means of at least one spinning nozzle (7) and at least one yarn (G) is subsequently produced from at least two continuous filaments (E), the yarn is drawn from a processing device (12) and continuously transferred to a twisting / combining device (15) by means of a collecting and conveying device (14).

Description

Technical Field

[0001] This invention relates to a method and apparatus for producing twisted or doubly twisted yarns. Background Technology

[0002] In the production of synthetic yarns, twisting of multifilament yarns is almost mandatory. Here, the twisting process is a separate process, completely independent of the spinning and drawing process of multifilament yarns.

[0003] According to existing technology, multiple continuous filaments are generated by means of spinning nozzles, these continuous filaments are combined into one or more yarns and dyed and / or textured according to the process flow so that they can be wound by a winding machine for curing after further processing steps. Here, the filaments and the yarns generated from the filaments are transported at different high speeds in the equipment so that they can be wound at speeds between 2000 m / min and 4000 m / min. For the subsequent twisting process, the bobbins with the wound yarn must be stored in the intermediate storage, which, depending on the material and application, must even be carried out in an air-conditioned area. This storage time, including bobbin handling, is very time-consuming, as evidenced by the fact that the subsequent twisting process is usually carried out at a speed of 40 m / min to 80 m / min. In the first unsuccessful approach, the speed difference between the spinning drafting process and the twisting process has been reduced by increasing the speed of the twisting process, but the current technical limit is about 12,000 revolutions per minute.

[0004] US 6164054 discloses a spinning drafting apparatus in which yarn is continuously guided from the spinning drafting apparatus to a twisting apparatus. If the process is interrupted or a malfunction occurs, both apparatus components stop operating.

[0005] US 6119320 describes an apparatus for producing multicolor synthetic yarns from segmented yarns of different colors, which are entangled together after deformation and subsequently wound. Subsequent twisting or doubling in a continuous process is not disclosed herein. Summary of the Invention

[0006] Based on the known prior art, the objective of this invention is to provide a method and an apparatus by which the spinning and twisting processes can be performed continuously. A continuous process is understood as a production process in which the yarn is no longer wound onto a spool and separately stored before the twisting process.

[0007] This invention relates to a method and apparatus for producing twisted synthetic yarn, wherein continuous filaments are produced from liquid plastic by means of at least one spinning nozzle, and at least one yarn is subsequently produced from at least two continuous filaments. The yarn is then drawn from a processing device and transferred to a twisting device by means of a collecting and conveying device. The invention includes the technical teaching that the collecting and conveying device can be configured as a storage device. The collecting and conveying device is used herein as a storage device, which can compensate for the different operating speeds of the spinning drafting equipment and the twisting device. For example, in the event of a bobbin change in the twisting device or in the event of a breakage of a continuous filament or yarn in the spinning drafting equipment, the collecting and conveying device can temporarily compensate for potential production accidents.

[0008] Alternatively or additionally, the collecting and conveying device may also be configured as a spatial connection between the spinning drawing equipment and the twisting device.

[0009] Alternatively or additionally, the collecting and conveying device may also be configured for further processing of the yarn after the processing device of the spinning drawing equipment, or for (e.g., by means of temperature-controlled rollers, cylinders or rolls) relaxing or freezing the current orientation of the molecular chains relative to each other, and / or for transport in a gaseous or hot steam environment.

[0010] The advantage of this invention is that the continuous process from producing continuous filaments to twisted yarn can be achieved without interruption by means of the collection and conveying device. The equipment can operate uninterruptedly on the production line from liquid plastic or granules to twisted yarn, saving space and reducing storage capacity and handling costs. Compared to the prior art, although the spinning drafting equipment operates at a lower capacity, this is generally low-cost because the spinning drafting equipment operates uninterruptedly and is equipped with simple components. Due to the lower speed of the spinning drafting equipment, the risk of yarn breakage is reduced, while yarns with higher quality can be produced because molecules have more time to orient and receive the specific temperatures of each component. Because of the slower speed of the spinning drafting equipment, the components can be constructed larger, allowing up to 20 or more yarns to be guided and drawn simultaneously on the guide disc.

[0011] Here, a predetermined length of at least one yarn is received by the collecting and conveying device to compensate for production differences between the spinning drafting equipment and the twisting device. This length can range from hundreds to thousands of meters, during which the yarn is placed, wound, or guided into loops or loops.

[0012] Preferably, at least two yarns are transferred from the spinning drafting equipment to the twisting device by means of a collecting and conveying device. If the existing spinning drafting equipment has one or more processing devices for multiple yarns, then, for example, a spinning drafting equipment with multiple collecting and conveying devices can be connected to multiple separate twisting devices, thereby increasing productivity.

[0013] In a preferred embodiment, the at least one yarn is processed in a hot steam or gas environment during its transfer from the spinning drafting device to the twisting device. The collecting and conveying device can be kept in a hot steam or regulated gas environment, which accordingly requires a housing or encapsulation.

[0014] Preferably, the at least one yarn is drawn out of the spinning drafting device at a speed of 100 m / min to 300 m / min, more preferably 100 m / min to 150 m / min. A speed range of 200 m / min to 300 m / min is possible if the twisting device can operate at a correspondingly high twist number exceeding 12000 U / min. Currently, this presupposes the use of a magnetic bearing as the spindle.

[0015] Preferably, the at least one yarn (G) is introduced into the twisting device at a speed of 10 m / min to 300 m / min, more preferably at a speed of 10 m / min to 150 m / min.

[0016] The spinning drawing equipment must operate at low load according to the production speed of the twisting device, where small differences in production speed are possible and necessary in order to enable the use of the buffer or storage device of the collection and conveying device, i.e., for emptying and filling.

[0017] In a preferred embodiment, the at least one yarn is guided and can be further processed inside the collecting and conveying device by means of a temperature-controlled roller, cylinder, or a row of guide rollers.

[0018] In one embodiment, at least one unstretched and / or stretched and / or relaxed and / or deformed yarn consisting of at least two single filaments is extracted from the processing device and transferred as one or more yarns to the twisting / twisting device on the collecting and conveying device.

[0019] In another embodiment, the at least one yarn, consisting of at least two single filaments, is adjusted or relaxed by means of a pulling device that can be configured as at least one conveying roller, wherein the method is preferably supported by steam or regulated gas. Thus, the pulling device can serve as an extension of the processing device, for example, as an alternative to a winder, which can also be used to stretch or relax the last pair of rollers.

[0020] With the aid of a controller, the spinning drafting device and the twisting device are matched in terms of their respective production speeds to the current storage capacity of the collecting and conveying device. Here, the average production speed is used as a reference point to determine whether the collecting and conveying device needs to be emptied or filled in terms of storage capacity (the two components may exceed or fall below this average production speed). With the aid of the same controller, the speed of the collecting and conveying device can also be matched to the current speeds of the spinning drafting device and the twisting device.

[0021] According to the present invention, an apparatus for producing twisted synthetic yarn includes at least one spinning and drawing device configured to produce continuous filaments from liquid plastic or granules by means of at least one spinning nozzle, and subsequently to produce at least one yarn from at least two continuous filaments, having a downstream processing device for processing the at least one yarn. It also includes a collecting and conveying device, and a downstream twisting device. Here, the apparatus is configured to continuously transfer at least one yarn from the spinning and drawing device to the twisting device or to transfer at least two yarns to the doubling device.

[0022] Therefore, according to the present invention, it is possible to produce a continuous process from continuous filament to twisted yarn without interruption. The equipment can operate uninterruptedly on a production line from liquid plastic or granules to twisted yarn, saving space and reducing storage capacity and handling costs. Compared to the prior art, although the spinning drafting equipment operates at a lower capacity, this is generally low-cost because it operates uninterruptedly and is equipped with simple components. Based on the lower speed of the spinning drafting equipment, the risk of yarn breakage is reduced, while yarns with higher quality can be produced because molecules have more time to orient and accept the specific temperatures of the individual components.

[0023] Here, the collecting and conveying device is configured to compensate for the difference in production speed between the spinning drafting equipment and the twisting device. Therefore, it is possible to replace the bobbins in the twisting device and eliminate yarn or continuous filament breakage without completely stopping the equipment.

[0024] Preferably, the at least one yarn is extracted from the processing device using a pulling device. The pulling device may consist of at least one conveying roller and may perform other tasks related to yarn processing. Therefore, the yarn in the pulling device can be relaxed or stretched, and processed simultaneously or separately using hot steam or regulated gas.

[0025] The collecting and conveying device can be constructed based on various principles for storing at least one yarn. It can be constructed as a circulating conveyor belt, rollers with yarn guides, cylinders with adjustable spacing, or a storage device with two rows of adjustable-spacing guide rollers. Each embodiment has different advantages and disadvantages in terms of storage capacity and the possibility of handling yarn.

[0026] In particular, the collecting and conveying device can be located inside a housing configured to be filled with hot steam or regulated gas. Therefore, the yarn can be further processed upstream of the twisting device for purposes such as stabilizing molecular chains or impregnating the yarn.

[0027] Preferably, the device has a controller configured to match the respective production speeds of the spinning drafting device and the twisting device to the current storage capacity of the collecting and conveying device, and vice versa. Therefore, high-load and low-load operation of the device components can be understood as slowly emptying or filling the storage device.

[0028] However, the controller is also configured to compensate for the corresponding difference in production speed between the spinning drafting equipment and the twisting device. Here, the storage capacity of the collecting and conveying device is monitored so that the twisting device operates at a low load when the spinning drafting equipment is stopped for an extended period, so that when the storage capacity is exceeded, the twisting device slowly returns to a stationary state.

[0029] Preferably, the controller is a component of the spinning and drawing equipment, because most of the technical difficulties may arise here and the twisting device must be matched to these operating conditions. Attached Figure Description

[0030] Furthermore, the following description of preferred embodiments of the invention, with the aid of the accompanying drawings, presents measures to improve the invention in more detail.

[0031] In the picture:

[0032] Figure 1 A schematic diagram of equipment for producing synthetic yarns up to further processing in a twisting / twisting device is shown.

[0033] Figure 2 A schematic top view showing a first embodiment of a collection and conveying device as a circulating conveyor belt;

[0034] Figure 3 A schematic top view showing another embodiment of the collecting and conveying device for the roller;

[0035] Figure 4 A schematic top view showing another embodiment of a collection and conveying device as a storage device with two rollers;

[0036] Figure 5 A schematic top view is shown as another embodiment of a collection and conveying device as a storage device with multiple turning parts. Detailed Implementation

[0037] The solutions according to the present invention include different combinations of features, particularly defined by the following sequentially numbered embodiments:

[0038] 1. A method for producing twisted or tandemly twisted synthetic yarn, wherein continuous filaments (E) are produced from liquid plastic or granules by means of at least one spinning nozzle (7) and at least one yarn (G) is subsequently produced from at least two continuous filaments (E), the yarn is drawn from a processing device (12) and continuously transferred to a twisting / tandemly twisting device (15) by means of a collecting and conveying device (14), characterized in that a predetermined length of the at least one yarn (G) is received by the collecting and conveying device (14) to compensate for production differences between the spinning drafting device (S) and the twisting device (15).

[0039] 2. The method according to embodiment 1, characterized in that at least two yarns (G) are transferred from the spinning drafting device (S) to the twisting device (15) by means of the collecting and conveying device (14).

[0040] 3. The method according to embodiment 1, characterized in that at least two yarns (G) are drawn from the processing device (12) and loosened by means of a pulling device and transferred as one or more yarns (G) to the collecting and conveying device (14) to the twisting / twisting device (15).

[0041] 4. The method according to any one of embodiments 1 to 3, characterized in that the at least one yarn (G) is processed in an environment of hot steam or regulated gas during the transfer from the spinning drawing device (S) to the twisting device (15).

[0042] 5. The method according to embodiment 1, characterized in that the at least one yarn (G) is drawn out from the spinning drawing device (S) at a speed of 10 m / min to 600 m / min, preferably at a speed of 50 m / min to 150 m / min.

[0043] 6. The method according to one of the above embodiments, characterized in that the at least one yarn (G) is introduced into the twisting device (14) at a speed of 10 m / min to 500 m / min, preferably at a speed of 10 m / min to 150 m / min.

[0044] 7. The method according to one of the above embodiments, characterized in that the at least one yarn (G) is guided inside the collecting and conveying device (14) by means of a temperature-regulating roller (21), a cylinder (23, 24) or a row of guide rollers (26a, 26b).

[0045] 8. The method according to one of the above embodiments, characterized in that the at least one yarn (G) is relaxed by means of a tensioning device that can be configured as at least one conveying roller (13), wherein the method is preferably supported by means of steam or regulated gas.

[0046] 9. The method according to one of the above embodiments is characterized in that the spinning drawing device (S) and the twisting device (15) are adapted by means of a controller to the current storage capacity of the collecting and conveying device (14) in terms of their respective production speeds, and vice versa.

[0047] 10. An apparatus for producing twisted or doubly twisted synthetic yarns, comprising a spinning drafting apparatus (S) configured to produce continuous filaments (E) from liquid plastic or granules by means of at least one spinning nozzle (7) and subsequently to produce at least one yarn (G) from at least two continuous filaments (E), the apparatus having a downstream processing device (12) for processing the at least one yarn (G), a collecting and conveying device (14), and a downstream twisting device (15), wherein the apparatus is configured to continuously transfer the at least one yarn (G) from the spinning drafting apparatus (S) to the twisting / doubly twisting device, characterized in that the collecting and conveying device (14) is configured to compensate for differences in production speed between the spinning drafting apparatus (S) and the twisting device (15).

[0048] 11. The apparatus according to embodiment 10 is characterized in that the at least one yarn (G) is extracted from the processing device (12) by means of a pulling device.

[0049] 12. The device according to embodiment 10 or 11, characterized in that the collecting and conveying device (14) is configured as a circulating conveyor belt (20).

[0050] 13. The device according to embodiment 10 or 11, characterized in that the collecting and conveying device (14) is constructed as a roller (21) having a yarn guide (22).

[0051] 14. The device according to embodiment 10 or 11, characterized in that the collecting and conveying device (14) is constructed as cylinders (23, 24) with adjustable distances between them.

[0052] 15. The device according to embodiment 10 or 11, characterized in that the collecting and conveying device (14) is configured as a storage device (25) having two rows of adjustable-distance guide rollers (26a, 26b).

[0053] 16. The device according to any one of embodiments 10 to 15, characterized in that the collecting and conveying device (14) is disposed inside a housing (16) configured to be filled with hot steam or regulated gas.

[0054] 17. The device according to any one of embodiments 10 to 16 has a controller configured to match the respective production speeds of the spinning drawing device (S) and the twisting device (15) to the current storage capacity of the collecting and conveying device (14), or configured to compensate for corresponding differences in the production speeds between the spinning drawing device (S) and the twisting device (15).

[0055] 18. The device according to embodiment 17, wherein the controller is a component of the entire system, preferably the spinning drawing device (S) and the conveying device (14).

[0056] The following is for reference Figures 1 to 5 The apparatus and method according to the invention are described. The same features are respectively given the same reference numerals in the figures. It is self-evident that these figures are shown only simplified and, in particular, not to scale.

[0057] In a first embodiment, a mixer 1 is configured to mix a melting container 2 filled with solid plastic granules. The plastic granules are typically supplied as scrap and are provided to the melting container 2 alone or together with scrap of another form of plastic, where they are melted into liquid plastic by means of an energy input. The mixer 1 is responsible for the continuous mixing of the plastic, in which the plastic changes between a solid and a liquid state (granules and solution) in an aggregated state during the process. The liquid plastic is guided from the melting container 2 to the spinning box 5 via pipes.

[0058] Alternatively, plastic pellets can be guided from a storage silo to an extruder 4 via a supply device 3. This extruder, by means of energy input and pressure, transforms the solid plastic pellets into liquid plastic, which is then guided via pipes to the spinning box 5 of a spinning drawing apparatus. Polypropylene, PA6, PA6.6, PET, PTT, or other materials can be used as the plastic. Heat stabilizers, dyes, titanium dioxide, UV stabilizers, or other additives with desired properties can be used to improve the material. Additives can be continuously added or incorporated into the raw materials.

[0059] The two methods can be used interchangeably. They have different advantages and disadvantages, but these are not important to this invention.

[0060] At least one spinning pump 6 is installed inside the spinning chamber 5, which forces liquid plastic through a spinning nozzle 7 with multiple small openings. Depending on the configuration of the spinning nozzle 7, it may have several openings, preferably at least two, or for example 50 to 60, or up to more than 1000 openings. The spinning nozzle 7 is connected to a heater 8 to prevent the plastic from freezing. Continuous filaments E flow through the various openings of the spinning nozzle, all of which pass through a well-like spinning channel 9 below the spinning nozzle 7 equipped with the heater 8, where the paste-like molecular structure of the plastic is first solidified. Below the spinning channel 9, additional cooling air is introduced into the spinning channel 9 via a downcomer 10. In the spinning channel 9, the cooled molecular structure of the continuous filaments E is affected by the amount of cooling air, temperature, and relative humidity.

[0061] Subsequently, at least one yarn G is produced from at least two, but preferably multiple, continuous filaments E, and this yarn is guided to the processing device 12 via a first guide disc 11. Preferably, each yarn G consists of at least two continuous filaments E.

[0062] The processing device 12 may have multiple heated or cooled guide rollers for stretching the yarn G. The guide rollers may be configured as single or double rollers, which stretch, compress, or relax the yarn G in stages at different speeds. Additional devices may be provided for processing the yarn G, for example, for entanglement and / or deformation and / or application and / or further processing. According to the prior art, the yarn G is ultimately wound by a winder after the processing device 12. According to the invention, after the processing device 12, the yarn G is directly transferred to a collection and conveying device 14, which temporarily stores the yarn G and subsequently transfers it to a twisting device 15. Here, it is a continuous process in which the yarn G is not individually wound and temporarily stored, but transferred from the spinning drafting device S to the twisting device 15 in one continuous motion without interruption.

[0063] Preferably, the yarn G is drawn out and transferred to the collecting and conveying device 14 by the conveying roller 13. The conveying roller 13 can be provided with the spinning drafting device S, or it can be set as a separate component between the spinning drafting device S and the collecting and conveying device 14. The conveying roller 13 can be used to further stretch or relax the yarn G. Here, the conveying roller 13 can be cooled or heated and / or housed in its own casing, which is filled with steam or regulated gas.

[0064] The equipment components described above, from the mixer 1 or the supply device 3 to the processing device 12, are collectively referred to as the spinning and drawing equipment S.

[0065] according to Figure 1 and Figure 2 The collecting and conveying device 14 can be configured as a continuous circulating conveyor belt 20 on which yarn G is coiled or circulated and conveyed to the twisting device 15. Here, the circulating conveyor belt 20 can have length extensions and width extensions, so that one or more yarns G can be coiled or circulated side-by-side over a length of several hundred meters. The circulating conveyor belt 20 can be maintained in a hot steam or gas environment, which may optionally require a housing 16 or encapsulation. The collecting and conveying device 14 serves as a storage device that can compensate for the different operating speeds of the spinning stretching equipment S and the twisting device 15. For example, in the event of a bobbin change in the twisting device 15 or a breakage of a continuous filament E or yarn G in the spinning stretching equipment S, the collecting and conveying device 14 can temporarily compensate for potential production accidents. The circulating conveyor belt 20 serves as a collection and conveying device to establish a connection upstream of the existing spinning drafting equipment S with the subsequently installed twisting device 15. The twisting device 15 can also be housed in another housing component of the equipment. Utilizing the surrounding housing 16, the collection and conveying device 14 can be configured to process the yarn G in special environments, such as with inert gases or hot steam, or to freeze the current molecular structure of the yarn G. In the described embodiment, two yarns G are drawn from the processing device 12 and placed side-by-side on the conveyor belt 20 via conveyor rollers 13, guiding them into a common twisting device 15 (twisting together) or separate twisting devices 15 (twisting). In principle, one or more yarns G can be conveyed parallel to the twisting device 15 via the collection and conveying device 14.

[0066] According to the present invention, the spinning drafting device S is matched to the twisting device 15 in terms of production speed. Preferably, after the processing device 12, the yarn G is drawn out at a speed of 100 m / min to 150 m / min and conveyed to the collecting and conveying device 14. The downstream twisting device 15 operates at a speed of 10 m / min to 150 m / min. The operating principle of the spinning drafting device S remains unchanged. It operates at only 30 times the speed, thereby making the components to be used easier and cheaper to manufacture. During normal operation, the spinning drafting device S and the twisting device 15 preferably operate at the same speed, which may be, for example, 100 m / min to 120 m / min. The collecting and conveying device 14 is configured to, for example, accommodate a storage capacity for one hour of production time for yarn G, i.e., 6000 meters of yarn at a production speed of 100 m / min. The buffer is sufficient to eliminate, for example, breakage of yarn G or continuous filament E, without having to stop the twisting device 15. The buffer is also sufficient to allow for the replacement of the bobbin of the twisting device 15 without stopping production of the spinning drafting equipment S. If, for example, the storage device with the produced yarn G is operating at low load due to the breakage of the continuous filament and subsequent cessation of the spinning drafting equipment S, the production speed of the twisting device can be simultaneously reduced, for example, to 50 m / min. This can be done during this period until the storage device storing the yarn G in the collection and conveying device 14 has resumed high-load operation to the predetermined rated value. For this purpose, the spinning drafting equipment S operates at an increased speed of up to 150 m / min. The controller of the entire equipment is configured to match the production speeds of the spinning drafting equipment S and the twisting device 15 so that there is always a sufficient reserve of yarn G in the collection and conveying device 14 to compensate for production failures or irregularities.

[0067] In another alternative embodiment, the speed of the spinning drafting device S and the speed of the twisting device 15 can be more closely matched. However, this relies on particularly expensive components, such as magnetic bearings for the spindle of the twisting device 15, enabling the twisting device 15 to operate at speeds far exceeding 12,000 rpm and continuously at speeds of 10 m / min to 300 m / min. According to the invention, the spinning drafting device S is also matched to the twisting device 15 in terms of production speed. In this embodiment, after the processing device 12, the yarn G is drawn out at a speed of 200 m / min to 300 m / min and conveyed to the collecting and conveying device 14. The downstream twisting device 15 operates at a speed of 10 m / min to 300 m / min. The operating principle of the spinning drafting device S remains unchanged. It operates at only 15 times the lower speed, thereby making the components to be used easier and cheaper to manufacture. During normal operation, the spinning drafting device S and the twisting device 15 preferably operate at the same speed, which can be, for example, 200 m / min to 240 m / min. The collecting and conveying device 14 is configured to, for example, accommodate a storage capacity for one hour of production time of yarn G, i.e., 12,000 meters of yarn at a production speed of 200 m / min. The buffer is sufficient in any case to allow the replacement of the bobbins of the twisting device 15 without stopping the production of the spinning drafting device S. Depending on the magnitude of the failure in the spinning drafting device S, the buffer may be sufficient to eliminate, for example, the breakage of yarn G or continuous filament E, without having to stop the twisting device 15. If, for example, the storage device with the produced yarn G is operating at low load due to the breakage of the continuous filament and the subsequent stop of the spinning drafting device S, the production speed of the twisting device can be reduced simultaneously, for example, to 50 m / min. This can be done during this period until the storage of yarn G in the collecting and conveying device 14 has resumed high-load operation to the predetermined rated value. For this purpose, the spinning drafting equipment S operates at an increased speed of up to 300 m / min. The controller for the entire equipment is designed to match the production speeds of the spinning drafting equipment S and the twisting device 15, ensuring that there is always sufficient yarn G reserve at the collection and conveying device 14 to compensate for production failures or irregularities. Depending on the operating mode of the spinning drafting equipment and the space available for the collection and conveying device 14, a storage device or buffer for 10 to 15 minutes of production accidents can also be sufficient to compensate for minor failures or bobbin replacements at the twisting device 15.

[0068] Figure 3A collecting and conveying device 14 is shown, which is constructed as a rotating drum 21 and can store yarn G on the drum 21 for a short time by means of a certain number of coils. The rotational speed of the drum 21 matches the exit speed of the yarn G discharged from the processing device 12. The increase or decrease of the inlet speed of the yarn G entering the twisting device 15 can be achieved by a yarn guide 22 arranged parallel to the axis of the drum 21. The number of coils of the yarn G on the drum 21 is controlled by the yarn guide 22. The embodiment of the collecting and conveying device 14 is also used for storing yarn G to compensate for the different speeds between the spinning drafting device S and the twisting device 15. However, the drum 21 can also be heated or cooled, or alternatively disposed in a housing 16 filled with a special environment.

[0069] This accompanying drawing also exemplarily illustrates all other embodiments in which the two yarns G can be discharged from the processing device 12 and relaxed by means of a pulling device configured as at least one conveying roller 13. Here, the process can be supported in the pulling device by means of hot steam or regulated gas.

[0070] Figure 4 Another collecting and conveying device 14 is shown, comprising at least two cylinders 23, 24 spaced apart from each other, which can continue to transport and temporarily store yarn G. Here, the yarn G is always wound into a loop around the two cylinders 23, 24, and the distance between the two cylinders and their rotational speed are controllable. This embodiment of the collecting and conveying device 14 is also used for storing yarn G to compensate for the different speeds between the spinning drafting device S and the twisting device 15. However, the cylinders 23, 24 can also be heated or cooled, or alternatively arranged in a housing 16 filled with a special environment. Of course, the collecting and conveying device 14 can have other cylinders, i.e., more than two cylinders 23, 24, which are controllable in terms of distance between them and their rotational speed.

[0071] exist Figure 5 Another embodiment of the collecting and conveying device 14 is shown, which is constructed as a storage device 25 having a first row of guide rollers 26a and a second row of guide rollers 26b, wherein yarn G is alternately wound around the first row of guide rollers 26a and then around the second row of guide rollers 26b. The variable distance between the rows of guide rollers 26a and 26b allows the yarn G to be stored and conveyed to the twisting device 15, thus compensating for the speed difference of the yarn G from the outlet of the processing device 12 to the inlet of the twisting device 15. Furthermore, the storage device 25 can be housed in a housing 16 filled with a special environment. The guide rollers 26a and 26b can also be constructed to be heated or cooled.

[0072] According to the present invention, the spinning drafting equipment S operates at a lower drafting speed than in the prior art. Here, the production speed of the spinning drafting equipment is equal to or slightly higher than the production speed of the twisting device 15. Reducing the production speed of the spinning drafting equipment S by approximately 15 to 30 times discourages professionals from considering investing in such equipment, as the price per ton of yarn would increase by almost the same factor. However, the spinning drafting equipment can be more easily designed based on lower productivity or lower production speed, thereby reducing investment costs. Crucially, the elimination of the entire handling and intermediate storage between the spinning drafting equipment S and the twisting device 15 further reduces operating costs according to the method of the present invention.

[0073] The advantage of this invention is that a continuous process from producing continuous filament to twisted yarn can be achieved without interruption by means of the collection and conveying device 14. The collection and conveying device 14 can be configured to compensate for production differences between the spinning drafting equipment S and the twisting device 15. Furthermore, the collection and conveying device 14 can be configured to further process the yarn by means of gas or hot steam, or by means of temperature-controlled rollers, cylinders, or rows of guide rollers. The equipment can operate continuously on the production line from liquid plastic to twisted yarn, which saves space and reduces storage capacity and processing costs. Compared to the prior art, although the spinning drafting equipment operates at a lower capacity, this is generally low-cost because the spinning drafting equipment operates continuously.

[0074] Figure label:

[0075] 1 Mixer

[0076] 2 Melting Container

[0077] 3. Supply device

[0078] 4 extruders

[0079] 5 Spinning box

[0080] 6 spinning pumps

[0081] 7 Spinning nozzles

[0082] 8 heaters

[0083] 9 Spinning tunnels

[0084] 10 downcomer

[0085] 11 guide discs

[0086] 12 processing units

[0087] 13 conveyor rollers

[0088] 14 Collection and conveying device

[0089] 15 Twisting device

[0090] 16-shell

[0091] 17. Add twisting needle to stop the needle.

[0092] 20 conveyor belts

[0093] 21 rollers

[0094] 22 yarn guide

[0095] 23 cylinders

[0096] 24 cylinders

[0097] 25 storage devices

[0098] Rows 26a and 26b have steering rollers

[0099] E Continuous Filament

[0100] G yarn

[0101] S spinning drawing equipment

Claims

1. A method for producing twisted or doubly twisted synthetic yarns, wherein, A continuous filament (E) is produced from liquid plastic or granules by means of at least one spinning nozzle (7) and then at least one yarn (G) is produced from at least two continuous filaments (E). The yarn is drawn from a processing device (12) and continuously transferred to a twisting / twisting device by means of a collecting and conveying device (14). The device is characterized in that a predetermined length of the at least one yarn (G) is received by the collecting and conveying device (14) to compensate for the production difference between the spinning drafting device (S) and the twisting device (15). The collecting and conveying device (14) is constructed as a circulating conveyor belt (20), a roller (21) with a yarn guide (22), cylinders (23, 24) with adjustable distances between them, or a storage device (25) with two rows of guide rollers (26a, 26b) with adjustable distances between them.

2. The method according to claim 1, characterized in that, At least two yarns (G) are transferred from the spinning drafting equipment (S) to the twisting device (15) by means of the collecting and conveying device (14).

3. The method according to claim 1, characterized in that, At least two yarns (G) are drawn from the processing device (12) and loosened by means of a pulling device and transferred as one or more yarns (G) to the twisting / twisting device on the collecting and conveying device (14).

4. The method according to claim 1, characterized in that, During the transfer from the spinning drawing device (S) to the twisting device (15), the at least one yarn (G) is processed in an environment of hot steam or regulated gas.

5. The method according to claim 2, characterized in that, During the transfer from the spinning drawing device (S) to the twisting device (15), the at least one yarn (G) is processed in an environment of hot steam or regulated gas.

6. The method according to claim 3, characterized in that, During the transfer from the spinning drawing device (S) to the twisting device (15), the at least one yarn (G) is processed in an environment of hot steam or regulated gas.

7. The method according to claim 1, characterized in that, The at least one yarn (G) is drawn out from the spinning and drawing device (S) at a speed of 10 m / min to 600 m / min.

8. The method according to claim 1, characterized in that, The at least one yarn (G) is fed into the twisting device (15) at a speed of 10 m / min to 500 m / min.

9. The method according to claim 6, characterized in that, The at least one yarn (G) is fed into the twisting device (15) at a speed of 10 m / min to 500 m / min.

10. The method according to claim 7, characterized in that, The at least one yarn (G) is fed into the twisting device (15) at a speed of 10 m / min to 500 m / min.

11. The method according to claim 1, characterized in that, The at least one yarn (G) is guided inside the collecting and conveying device (14) by means of a temperature-controlled roller (21), a cylinder (23, 24) or a row of guide rollers (26a, 26b).

12. The method according to claim 9 or 10, characterized in that, The at least one yarn (G) is guided inside the collecting and conveying device (14) by means of a temperature-controlled roller (21), a cylinder (23, 24) or a row of guide rollers (26a, 26b).

13. The method according to claim 1, characterized in that, The at least one yarn (G) is relaxed by means of a traction device that can be configured as at least one conveying roller (13).

14. The method according to claim 12, characterized in that, The at least one yarn (G) is relaxed by means of a traction device that can be configured as at least one conveying roller (13).

15. The method according to claim 1, characterized in that, The controller enables the spinning drawing device (S) and the twisting device (15) to be adapted in terms of their respective production speeds to the current storage capacity of the collecting and conveying device (14).

16. The method according to claim 14, characterized in that, The controller enables the spinning drawing device (S) and the twisting device (15) to be adapted in terms of their respective production speeds to the current storage capacity of the collecting and conveying device (14).

17. The method according to claim 1, characterized in that, The at least one yarn (G) is drawn out from the spinning and drawing device (S) at a speed of 50 m / min to 150 m / min.

18. The method according to claim 1, 6, or 7, characterized in that, The at least one yarn (G) is fed into the twisting device (15) at a speed of 10 m / min to 150 m / min.

19. The method according to claim 13 or 14, characterized in that, The method is supported by steam or regulated gas.

20. Equipment for producing twisted or double-twisted synthetic yarns, comprising a spinning and drawing apparatus (S), said spinning and drawing apparatus being configured to produce continuous filaments (E) from liquid plastic or granules by means of at least one spinning nozzle (7) and subsequently to produce at least one yarn (G) from at least two continuous filaments (E), said apparatus having a downstream processing device (12) for processing said at least one yarn (G), a collecting and conveying device (14), and a downstream twisting device (15), wherein, The equipment is configured to continuously transfer the at least one yarn (G) from the spinning drafting device (S) to the twisting / twisting device, characterized in that the collecting and conveying device (14) is configured to compensate for the difference in production speed between the spinning drafting device (S) and the twisting device (15), wherein the collecting and conveying device (14) is configured as a circulating conveyor belt (20), a roller (21) having a yarn guide (22), cylinders (23, 24) with adjustable spacing between them, or a storage device (25) having two rows of guide rollers (26a, 26b) with adjustable spacing between them.

21. The device according to claim 20, characterized in that, The at least one yarn (G) is pulled out from the processing device (12) by means of a pulling device.

22. The device according to claim 20, characterized in that, The collection and conveying device (14) is disposed inside a housing (16) which is configured to be filled with hot steam or regulated gas.

23. The device according to claim 21, characterized in that, The collection and conveying device (14) is disposed inside a housing (16) which is configured to be filled with hot steam or regulated gas.

24. The device according to any one of claims 20 to 23, having a controller configured to match the respective production speeds of the spinning drawing device (S) and the twisting device (15) to the current storage capacity of the collecting and conveying device (14), or configured to compensate for corresponding differences in production speeds between the spinning drawing device (S) and the twisting device (15).

25. The device according to claim 24, characterized in that, The controller is a component of the entire system.

26. The device according to claim 24, characterized in that, The controller is a component of the spinning and drawing equipment (S) and the collecting and conveying device (14).

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