RU2556473C2 - Device for spinning from melt, drawing and rolling of several complex threads - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: proposed invention relates to spinning complex threads from melt, their drawing and rolling. Proposed device comprises spinning device, cooling device, drawing device and winding device. Thread wetting device is arranged between cooling device and winding device. Thread wetting device is composed by two separate preparation sections arranged upstream and downstream of drawing device. Proposed device differs from known designs in that one of preparation sections can be controlled and/or connected for threading wetting adjustment. Note also that first preparation section is located upstream of drawing device and equipped with moving wetting means. The latter can be set to working position for contact with thread and to rest state without this contact. This allows a constant thread wetting related with appropriate operating conditions.

EFFECT: perfected design.

10 cl, 2 dwg

Description

The invention relates to a device for spinning from a melt, drawing and winding several complex threads according to the restrictive part of claim 1 of the claims.

In the manufacture of synthetic yarns, primarily for use in the textile field, it is generally known that multifilament yarns are wetted after melt spinning and cooling to combine, on the one hand, a multitude of thin filaments inside one yarn and, on the other hand , to create an antistatic state so that it is possible to reliably direct the connection of the filaments through the guiding elements and spinning disks. Therefore, it is common to carry out such wetting of the threads immediately after the first cooling of strands of filaments. However, the wetting liquid introduced into the filament connection also has the disadvantage that, first of all, during the heat treatment, the wetting liquid must also be heated or evaporated, depending on the type and composition, in order to heat the filament material to certain processing temperatures. Therefore, various methods and devices are known from the prior art so that a wetting liquid can be supplied to the threads.

Thus, for example, from DE 19649809 A1, a device is known in which a preparation device is formed by two separate preparation sections. In the first preparation section, which is located in front of the exhaust device, the thread is pretreated. At the same time, the amount of preparative wetting fluid, coordinated with subsequent heat treatment, is brought to the thread. After heat treatment and drawing in the second preparation section, subsequent processing is carried out to introduce the amount of wetting liquid necessary for further processing into the thread. Thus, in each of the preparation sections, a strictly specified part of the wetting liquid is supplied to the thread.

From WO 2009/141424 A2 another device is known for melt spinning, drawing and winding multifilament yarns, in which the preparation device has only one preparation section, which is located behind the exhaust device. In this device, the multifilament yarn is pulled from the spinning device without any wetting. In this case, the threads are pulled in a dry state. However, this requires additional tools, such as, for example, devices for pneumatic connection of threads, to ensure minimum compactness of the thread in the threads before the pulling process.

However, in principle, a similar device is also known from the prior art in which the preparation device consists of one preparation section that directly relates to a cooling device, since this, for example, is known from DE 10309966 A1. In this known device, the preparation section is part of a cooling device and is adjustable to apply a wetting liquid. Thus, the preparation section may be in operation between the speed of the technological process for the manufacture of threads and the state of threading at the beginning of the technological process. Thus, in each operating state, a predetermined amount of wetting fluid is supplied to the threads.

However, in addition, from the prior art, it is also known to change the amount of wetting liquid applied during the process, depending on the constantly fixed parameters of the process or product. A similar device is described, for example, in DE 4444150 A1. At the same time, the preparation section related to the cooling device is controlled in such a way that, depending on the measured value, an increase or decrease in the applied amount of the preparation is carried out.

All known devices for spinning from a melt, drawing and winding complex yarns are combined in that they respectively only to a very limited extent cover one operating mode for the manufacture of complex yarns. However, there are numerous operating conditions in the manufacture of complex yarns during the process of spinning from the melt. Thus, at the beginning of the technological process, first, after piecing, the threads are preferably threaded into the technological units one after another using manually guided overhead accessories. It should be noted that continuously extruded strands of filaments during the entire process of threading the thread can be continuously fed into the waste collection. After the threading process is completed, the technological units at the next technological stage are accelerated to the speed necessary for the production of threads. During this time, the threads are already wound into bobbins, which, however, are treated as waste yarn. And therefore, after reaching the speed of the technological process, bobbins are replaced to prevent mixing of threads with bobbins. In addition, it is necessary to take into account the operating conditions in which the threads, due to breaks, are preferably separated to the exhaust device and continuously fed to the waste through a stationary exhaust device.

From this, in turn, follows the task of the invention, which consists in creating a device of this kind, with which it is possible to flexibly wet the threads, depending on the relevant requirements and operating conditions.

This task according to the invention is solved by means of a device with features of an independent claim.

Preferred improvements of the invention are defined by features and combinations of features of the dependent claims.

A device is proposed for spinning from a melt, drawing and winding several complex threads using a spinning device, a cooling device, an exhaust device, a winding device and a preparation device for wetting the threads located between the cooling device and the winding device. The preparation device is formed by two separate preparation sections, which along the thread are located before and after the exhaust device. In accordance with the invention, at least one of the preparation sections is adapted to be controlled and / or connected to control the wetting of the thread, the first preparation section being located upstream of the exhaust device and provided with a movable wetting means which is optionally operable with a contact with the thread and at rest without contact with the thread. The device according to the invention is characterized in that at least one of the preparation sections can be used in order to obtain wetting of the threads adapted to the corresponding operating mode. Moreover, in an alternative way, only a predetermined amount of wetting liquid can be changed, or a complete shutdown and connection of the preparation section can be realized. Moreover, in the connected state, it is also possible to change the supplied amount of the wetting liquid. For this, at least one of the preparation sections is configured to control and / or connect to control the wetting of the thread.

The first preparation section is made with a movable wetting agent, optionally brought into operation with contact with the thread and at rest without contact with the thread in order to minimize the friction of the thread in its direction. For threading and threading, the latter are brought to a wetting agent in contact with the thread. However, during the manufacture of the yarns, this contact with the yarn can be avoided due to the fact that the wetting agent is brought to rest. This allows you to reduce or eliminate the harmful formation of electrostatic charges due to friction of the thread on the wetting agent without supplying a wetting liquid.

First of all, for the manufacture of fully elongated yarns, which are subjected to heat treatment for extrusion, the improved form of the invention is preferably used, in which case the first preparation section can optionally be switched to the operating mode with wetting of the thread or to the resting state without wetting of the thread. Thus, it is possible to wet them during the manufacture of the yarns in the second preparation section, so that for receiving dry threads the first preparation section is placed in a resting state. On the contrary, the threads for sticking could be wetted directly in the first preparation section, so that they can be filled protected from static inflation and can be taken into the waste collection.

The compactness of the thread when threading the threads can be advantageously improved due to the fact that the wetting agent of the first preparation section is formed by several pin nipples that are mounted on a common movable carrier. Thus, all strands extruded in the same spinning position can be simultaneously directed through a wetting agent.

In the manufacture of threads, each of the threads is wetted on the outlet side of the exhaust device due to the second preparation section. For this, the preparation section is preferably provided with a stationary wetting agent with a finely porous contact surface on which the threads can be directed together in parallel with high speeds. It is essential that a partial entanglement of the finely porous contact surface is achieved, so that even at very high speeds of movement of the thread, sufficient wetting of the threads is achieved.

Since the requirements for the preparation sections are largely determined by the various operating modes, the preparation device is preferably formed by two separate power units that are related to the preparation sections. The power supply units can be connected together with one tank or, preferably, individually connected to two tanks. Thus, various wetting liquids can be supplied to the threads in the first and second preparation sections.

The proposed device is further described in more detail based on several embodiments with reference to the accompanying figures.

The figures show:

FIG. 1 is a schematic side view of an embodiment of the invention,

FIG. 2 is a schematic side view of another embodiment of the invention.

In FIG. 1 shows a first embodiment of the inventive device for spinning from a melt, drawing and winding several complex threads. For spinning from a melt of a complex thread, a spinning device 14 is provided with a heated spinning beam 1, which is provided on its reverse side with a die 3 with a large number of die holes and on the upper side has a receiving hole 2 for the melt. The melt receiving hole 2 is coupled to a melt source not shown here, for example, an extruder. Inside the spinning beam 1 can be located other guides and transmitting the melt parts, which we will not dwell on here in more detail.

Several dies 3 are located on the spinning beam 1 below to spin simultaneously several threads parallel to each other in the form of rows or in the form of a zigzag. The spinning beam 1 is located across the plane of the drawing, so that in FIG. 1 only one of the dies is visible 3. Therefore, the following devices and assemblies are explained in more detail only on the basis of the passage of the thread. In principle, each of only five threads created parallel to each other is processed simultaneously.

Under the spinning device 14, a cooling device 6 is provided, which consists of a cooling shaft 8 and a blowing device 7. The cooling shaft 8 is located below the die 3 so that a plurality of filaments 4 extruded through the dies pass through the cooling shaft 8. By means of a blowing device 7, a stream of cooling air can be created, which enters the cooling shaft 8, so that the filaments 4 extruded through the dies 3 are uniformly cooled by the cooling stream.

Under the cooling shaft 8 there is a yarn guide 9 for combining the threads to bring together the filaments 4 into a bundle 5 of filaments. For this, the yarn guide 9 for combining the threads is located centrally under the die 3, so that the filaments 4 are evenly brought together in the yarn guide 9 to combine the threads.

The first preparation section 16.1 of the preparation device 16 is associated with the yarn feeder 9 for combining the threads. The preparation section 16.1 in this embodiment is equipped with a wetting means 36.1, a power unit 17.1 and a tank 19.1, the power unit 17.1 being regulated by means of a regulating device 18. The wetting means 36.1 made stationary and combined with yarn guide 9 to combine the threads. The power unit 17.1 is preferably provided with a metering pump, by means of which an adjustable volumetric flow of wetting fluid can be generated.

Under the cooling shaft 8, a vertical shaft 10 adjacent to it is located with the thread guide 11 for the incoming thread located on the outlet side. Inside the vertical shaft 10, bundles of 5 filaments are connected based on the spinning step determined by the distance between the spinnerets to the processing distance. For this, the bundles 5 of filaments due to the yarn guide 11 for the incoming thread are placed relative to each other at a processing distance, so that the bundles 5 of filaments can be directed parallel to each other at a small distance in the range of 3-8 mm.

Under the vertical shaft 10 is an exhaust device 15 with several driven spinning disks 20.1-20.4. In this case, the spinning disks 20.1 and 20.2 form the first pair 13.1 of the spinning disks, and the spinning disks 20.3 and 20.4 form a second pair of 13.2 spinning disks. The spinning disks 20.1 and 20.2 of the first pair 19.1 of spinning disks are located one above the other and, accordingly, are driven by separate electric motors with the same peripheral speed and counterclockwise. Thus, to drive the spinning disks 20.1 and 20.2, as well as the spinning disks 20.3 and 20.4 of the second pair 13.2 of the spinning disks, left-handed and right-handed electric motors are used. The sheaths 20.1-20.4 of the spinning discs are heated to draw the threads, especially in the transition region between the pairs 13.1 and 13.2 of the spinning discs.

To receive the bundle 5 of filaments from the spinning zone, a thread tensioner 12 is located in front of the first pair 13.1 of spinning disks along the thread direction. The thread tensioner 12 in this embodiment consists of several guide rollers that are mounted for free rotation. The bundle 5 of filaments is guided through guide rollers with a corresponding partial coverage, and the filaments of a bundle of 5 filaments take the form of a tape. Thus, a ribbon-like passage of the yarn along the periphery of the spinning disks 20.1-20.4 is achieved.

The first pair 13.1 of spinning disks serves to remove a bundle of 5 elementary fibers. For this, bundles of 5 filaments with a simple partial coverage are guided through the guiding casings of the spinning disks 20.1 and 20.2. Bundles of 5 filaments cover the guide casing of the spinning disks 20.1 and 20.2 alternately with an S-shaped passage of the thread. To this end, the spinning discs 20.1 and 20.2 are preferably arranged so that when the filament passes, an angle of coverage of> 180 ° is formed accordingly.

A second pair 13.2 of spinning disks is driven at a drawing speed that is higher than the reception speed. In this case, the bundle of filaments is also conducted through the spinning disks 20.3 and 20.4 with a simple S-shaped coverage. The pairs 13.1 and 13.2 of the spinning disks are located in the box 21 of the spinning disks. For this, a bundle of 5 filaments is sent through the entrance to the box 21 of spinning disks and through the exit from the box 21 of spinning disks.

Under the casing 21 of the spinning disks is a second preparation section 16.2 and another drive spinning disk 20.5. The preparation section 16.2 is equipped with a stationary wetting agent 36.2, which is connected to the power supply 17.2. The power assembly 17.2, which preferably consists of a metering pump, is connected to a tank 19.2, which contains a wetting liquid. The wetting agent 36.2 is provided with a finely porous contact surface 37, which comes into contact with bundles 5 of filaments guided between the spinning disks 20.4 and 20.5.

In the further course of the yarn, the spinning disk 20.5 is equipped with another spinning disk 20.6, which is fixed above the winding device 23. Between the spinning disks 20.5 and 20.6, the device 32 for pneumatic connection of the threads is integrated into the stretched section of the thread to create a leveling of the wetting liquid in the threads 22, and also create the connection of the thread due to the formation of the node weave. In this case, the tension of the thread for pneumatic connection of the thread 22 can be determined, mainly, due to the difference between the speeds established between the spinning disks 20.5 and 20.6.

A winding device 23 is located under the spinning disks 20.5 and 20.6. The winding device 23 in this embodiment consists of a bobbin rewinder with a turret, which has one spindle head 29 with two protruding spindles 27.1 and 27.2 of the winding head. The spindle head 29 is mounted on the frame 30 of the machine. In this case, the spindles 27.1 and 27.2 of the winding head are alternately led to the working area for winding the bobbin and to the replacement zone for replacing the bobbin. A thread folding device 25 and a pressure roller 26 are provided on the frame 30 of the machine 30 to wind the thread 22 into the bobbin 28. Above the thread folding device 25 is provided a thread guide 24 for the upper thread, by which the threads 22 are guided to the winding positions. In this exemplary embodiment, the yarn guide 24 for the upper thread consists of guide rollers with free rotation to redirect the thread exiting from the spinning disk 20.6 from the horizontal horizontal distribution plane to the outside to the winding position.

Shown in FIG. 1, an embodiment is shown in an operating mode in which several multifilament yarns are produced continuously next to each other. In this case, the necessary wetting of the threads can be carried out in various ways. In the case of the first alternative, in the first preparation section 16.1, the supply unit 17.1 is brought to a standstill by means of the regulating device 18, so that the wetting liquid does not leave the wetting means 36.1. Thus, the bundles 5 of filaments are connected exclusively by the yarn guide 9 to combine the threads without adding a wetting liquid. Due to this, the bundles of 5 filaments leave the vertical shaft 10 mainly in a dry state and enter the exhaust device 15. After drawing with the help of the exhaust device 15, the bundles of filaments in the second preparation section 16.2 are wetted with a wetting liquid. In this case, a water-in-oil emulsion or a pure low-viscosity oil is preferably used as a wetting liquid in order to create a combination of filaments. The distribution of the wetting fluid within the thread joint, as well as the final thread joint, is then created using the thread pneumatic jig 32.

In the case where the filaments sensitive to static charges are created, it is possible to use the device according to the embodiment of FIG. 1, so that in the preparation section 16.1, the power unit 17.1 is tuned with the help of the regulating device 18 so that the wetting fluid taken from the tank 19.1 enters the bundle of 5 filaments in a minimum amount. Due to this, primarily due to this, the thread direction between the cooling device 6 and the exhaust device 14 can be optimized. Due to the use of two separate tanks 19.1 and 19.2 in the preparation section 19.1 and 19.2, various wetting liquids can be used to wet the threads.

In the case when the threads must be threaded by the operator before the start of the technological process, the bundles of 5 filaments after piecing are introduced through the die 3 using a manually guided vacuum gun 38. This state is shown in FIG. 1 dashed line. In this case, the bundle of elementary fibers due to the first preparation section 16.1 is continuously wetted by a wetting liquid. For this, the power unit 17.1 with the help of the adjusting device 18 switches to the operating state, in which the wetting fluid taken from the tank 19.1 is continuously supplied to the manually guided bunches of filaments. Thus, the threading and filling of the bundle 5 of filaments in the subsequent technological units of the exhaust device 21 and the winding device 23 can be carried out in a simple way. Static inflations of a bundle of filaments that complicate refueling are avoided. In addition, traction and tangling of filaments at the entrance to a manually guided vacuum gun is not possible.

In FIG. 2 schematically shows a side view of another example implementation of the proposed device. The embodiment of FIG. 2 is basically identical to the embodiment of FIG. 1, so that only significant differences will be explained here, but otherwise, reference will be made to the above description.

In the case of FIG. 2 of the embodiment, the preparation section 16.1 is provided with a movable wetting agent 36.1. The wetting agent 36.1 in this embodiment is a pin grease nipple 33 that is fixed to the carrier. The carrier 34 has the ability to move back and forth along the guide 35 across the direction of movement of the thread. Thus, the wetting agent 36.1 can optionally be brought into operation with contact with the thread or at rest without contact with the thread. In FIG. 2 shows the resting state of the wetting agent 36.1. The operating state of the wetting agent 36.1 is indicated by a dashed line. The wetting means 36.1 is connected by a flexible conduit to a power unit 17.1, which is connected to the tank 19.

Located under the vertical shaft 10, the exhaust device 15 in this embodiment is made with a receiving spinning disk 39 in the input zone. The receiving spinning disk 39 picks up 5 elementary fibers from the spinning device 14. The remaining spinning disks of the exhaust device 15 are identical to the above examples of the invention, so we do not provide further explanation here.

Next to the exhaust device 15, the second preparation section 16.2 in this embodiment is also identical, with the supply unit 17.2 and the supply unit 17.1 of both preparation sections connected to the tank 19. Thus, in both preparation sections identical wetting liquids are applied to the threads.

In the case of FIG. 2 of the embodiment, the preparation section 16.1 is mainly used only for wetting the bundle of filaments during the filling process. For this, the wetting agent 36.1 of the preparation section 16.1 is brought into operation so that the bundle 5 of elementary fibers elongated by means of a manually guided vacuum gun 38 is wetted with a wetting liquid before entering the vacuum gun. After the filling process is completed and the manufacturing process can be started, the wetting agent 36.1 is brought to a standstill. For this, the carrier element 34 is brought out along the guide 35 from the path of the thread to the rest state without contact with the thread. The adjustment of the carrier 34 can be carried out manually or by means of an actuator.

The carrier 34 of the preparation section 16.1 has one pin nipple 33 for each thread, respectively, so that the input and output of the wetting agent 36.1 uniformly extends to all parallel passing threads. Thus, collective adjustment can be made in a simple manner.

However, it is necessary to mention that the preparation sections 16.1 and 16.2 may have a separate wetting agent for each passage of the thread. In principle, all the design options standard for wetting complex threads can be used.

In addition, it is also possible that the power supply unit 17.2 was equipped with a separate control device so that changes in the applied amount of the formulation to the threads during the process can be made.

LIST OF REFERENCE NUMBERS

1 Spinning beam

2 melt inlet

3 Die

4 Elementary threads

5 Bundle of filaments

6 cooling device

7 Blower

8 cooling shaft

9 Thread guide for combining threads

10 Vertical shaft

11 Thread guide for incoming thread

12 thread tensioner

13.1, 13.2 A pair of spinning discs

14 Spinning device

15 Exhaust device

16 Preparation device

16.1, 16.2 Preparation section

17.1, 17.2 Power node

18 Regulator

19, 19.1, 19.2 Tank

20.1 ... 20.6 Spinning disc

21 Spinning Box

22 thread

23 Winding device

24 Thread guide for the upper thread

25 Folding device

26 Pinch roller

27.1, 27.2 Spindle of the winding head

28 Bobbin

29 spindle head

30 car frame

31 cartridge spools

32 Tool for pneumatic connection of threads

33 pin grease fitting

34 Carrier

35 Guide

36.1, 36.2 Wetting agent

37 Contact surface

38 Vacuum gun

39 receiving spinning disk

Claims (10)

1. A device for spinning from a melt, drawing and winding several complex threads using a spinning device (14), a cooling device (6), an exhaust device (15), a winding device (23) and located between the cooling device (6) and the winding device (23) the preparation device (16) for wetting the threads, and the preparation device (16) is formed by two separate preparation sections (16.1, 16.2), which along the thread are located before and after the exhaust device (15), characterized in that at least one of the preparation sections (16.1, 16.2) is made with the possibility of control and / or connection for regulating the wetting of the thread, and the first preparation section (16.1) is located before the exhaust device (15) and is equipped with a movable wetting means (36.1), which is made with the ability to optionally bring into operation with contact with the thread and at rest without contact with the thread. 2. The device according to claim 1, characterized in that the first preparative section (16.1) is configured to switch optionally to a working state with the thread wetted or to rest without wetting the thread. 3. The device according to claim 1, characterized in that the wetting agent (36.1) is formed by several pin nipples (33), which are mounted on a common movable bearing element (34). 4. The device according to one of paragraphs. 1-3, characterized in that the second preparation section (16.2) is equipped with a stationary wetting agent (36.2) with a finely porous contact surface (37). 5. The device according to one of paragraphs. 1-3, characterized in that the preparatory device (16) is equipped with two separate power nodes (17.1, 17.2), which are connected to the preparation sections (16.1, 16.2) for supplying a wetting liquid. 6. The device according to claim 4, characterized in that the preparation device (16) is equipped with two separate power units (17.1, 17.2), which are connected to the preparation sections (16.1, 16.2) for supplying a wetting liquid. 7. The device according to p. 5, characterized in that the nodes (17.1, 17.2) of the power supply are connected together with one tank (19) or individually connected to two tanks (19.1, 19.2). 8. The device according to p. 6, characterized in that the nodes (17.1, 17.2) of the power supply are connected together with one tank (19) or individually connected to two tanks (19.1, 19.2). 9. The device according to claim 5, characterized in that at least one regulating device (18) is provided, which is coupled to one of the power supply nodes (17.1, 17.2). 10. The device according to claim 6, or 7, or 8, characterized in that at least one regulating device (18) is provided, which is interfaced with one of the power supply nodes (17.1, 17.2).

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