JP7143393B2 - Melt spinning equipment - Google Patents

Description

The present invention relates to a melt spinning apparatus for producing synthetic yarns, according to the preamble of claim 1 .

Synthetic yarn production is carried out on melt spinning equipment having multiple spinning stations. A plurality of spinning stations are installed side by side to form the longitudinal front of the machine in the machine hall. Each spinning station has a spinning nozzle unit with a plurality of spinning nozzles for extruding a plurality of yarns. The yarns of one spinning station are drawn together as a group of yarns from the spinning nozzle by the godet unit and at the end of the process are wound up in parallel at several winding points of the winding unit to form a package. The winding units of the spinning station each comprise two winding spindles held in one winding revolver so that the yarn can be produced continuously at the spinning station. Only at the start of the process or when the process is interrupted does it become necessary to guide the yarn group in the spinning station by means of an auxiliary unit, for example to hang it on a godet unit and a winding unit. Such an auxiliary unit is preferably formed by an automatic operating device. An automatic manipulator is movably guided along the longitudinal front of the machine and is selectively feedable for threading one of the spinning stations. Such a melt spinning apparatus is disclosed, for example, in EP-A-3162748.

In known melt spinning devices, the automatic manipulator is operably configured to selectively access individual spinning stations. In order to guide and thread the yarn group in the relevant spinning position, the automatic manipulator has a suction injector. The suction injector continuously receives and guides the skein of yam into a lint receptacle. Basically, different variants of the connection between the suction injector and the lint container are possible.

Thus, for example from EP 0 803 595 A1, a driveable automatic control device with a suction injector is known. In this manipulator, the lint container is arranged directly on the manipulator. However, such an arrangement with an integrated lint container basically has the disadvantage that it has a limited capacity for containing lint.

In principle, however, EP-A-0 010 772 discloses an automatic operating device in which a suction injector is connected via a waste line to a stationary yarn container. However, such systems basically have the great disadvantage that the lint duct must span a large section and therefore require a relatively high overpressure of the compressed air. The associated high compressed air consumption makes such systems uneconomical in terms of energy.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to improve a melt-spinning apparatus for producing synthetic yarns of the type mentioned at the outset, in such a way that the lint caused by the automatically manipulating apparatus can be accommodated and stored as energy-efficiently as possible. to do.

Another object of the present invention is to improve the automatic operation of the melt spinning apparatus mentioned at the outset so that relatively long operating times can be realized even with an integrated lint bin.

This problem is solved according to the invention in that a lint container for containing lint has a cyclone-shaped inner structure in which the lint can be deposited in a spiral.

Advantageous variants of the invention are defined by the features and feature combinations of the dependent claims.

The invention has the particular advantage that the lint can be deposited in a very compact, one-on-one position in the lint receptacle. Due to the cyclonic inner structure of the lint receptacle, the incoming lint stream is deflected in a predefined guide trajectory and enters the lint receptacle for helical deposition. This prevents a messy placement and thus tangling of the threads in the lint receptacle. In addition to the extremely compact filling of the lint container, there is also the advantage that the removal from and emptying of the lint container is facilitated.

A lint duct connected to the suction injector is connected to the lint container via a tangentially oriented container connection so that a lint stream can be introduced into the lint container with a corresponding setting. A variant of the melt spinning device according to the invention is preferably implemented in which the container connection is formed in the upper region of the lint container. Therefore, the suction flow produced by the suction injector can be advantageously used to introduce lint in the desired lint flow into the lint receptacle.

The air stream introduced into the lint container via the lint duct is preferably discharged via a discharge opening provided in the upper side of the lint container.

The lint stream formed in the lint bin is further enhanced by a vacuum source connected to the exhaust opening, with which a vacuum can be created in the lint bin. The suction action in the lint duct is increased for receiving and introducing the swarm of threads into the lint receptacle.

By compactly depositing the lint bin in the lint bin, the lint bin is held on the carrier frame of the automatic manipulator and the underside of the lint bin has a movable lint flap for opening and closing. A variation of the melt spinning apparatus is preferably practiced. This provides the possibility of emptying the lint container by simply opening the lint flap.

For this purpose, the lint flap is associated with a controllable actuator, which is connected to an automatic control of the automatic operating device.

By detecting the filling level of lint in the lint bin and using a fill level sensor connected to an automatic controller, the process of emptying the lint bin can be automated. The automatic operating device is therefore preferably guided into a waiting position in which the lint bin is associated with the collecting bin.

One of a plurality of connection stations with a respective compressed air connection for the transmission of compressed air to each spinning position, so that the compressed air-actuated suction injectors of the automatic manipulator can be operated at each spinning position. A variant of the invention in which two are arranged in correspondence is particularly advantageous. Thereby, the automatic manipulator is selectively connected to the connection station for compressed air transmission via the connection adapter. Thereby, the automatic manipulator is advantageously automatically connected to one compressed air supply at each spinning position.

In order that the automatic manipulator can reach each spinning position as quickly as possible, the guide unit is formed by a suspended track. On the suspension track, the automatic manipulator is movably held by the carrier means. Collisions with floor-travelable doffer units for unloading full tubes are thus advantageously avoided.

By means of an advantageous variant of the melt spinning device, in which the automatic manipulator has a controllable robot arm, the suction injector can be operated with great flexibility for guiding and threading one group of yarns at the spinning station. . The free mobility of the robot arm achieves an extremely high degree of freedom for guiding the suction injector.

The melt spinning apparatus according to the invention is particularly suitable for carrying out fully automated production of synthetic yarns. The work effort for the operator is significantly reduced and is substantially defined by control functions and maintenance work.

The melt spinning apparatus according to the present invention will now be described in detail with reference to the accompanying drawings with reference to embodiments.

1 is a schematic front view of multiple spinning positions of a melt spinning apparatus according to the present invention; FIG. FIG. 2 is a schematic front view of the automatic operating device of the melt spinning apparatus according to the present invention shown in FIG. 1; Fig. 3 is a schematic cross-sectional view of the lint container of the automatic manipulator shown in Fig. 2; Figure 2 is a schematic side view of one of the spinning stations of the melt spinning apparatus according to the invention shown in Figure 1; FIG. 2 is a schematic side view of the automatic operating device of the melt spinning apparatus according to the present invention shown in FIG. 1; FIG. 4 is a schematic side view of one of the spinning positions during threading; 2 is a schematic front view of the embodiment shown in FIG. 1 in changed operating conditions; FIG.

1 and 4 illustrate in front and side views an embodiment of a melt spinning apparatus according to the invention with multiple spinning stations. The following description applies to both figures, unless explicitly linked to one of the figures.

An embodiment of the melt spinning apparatus according to the invention comprises a plurality of spinning stations 1.1-1.6. These spinning stations 1.1 to 1.6 are arranged side by side in a row-like arrangement and form the machine longitudinal sides. The number of spinning positions illustrated in FIG. 1 is merely exemplary. Basically, a melt spinning apparatus of this type contains multiple spinning stations of the same type.

The structure of the spinning stations 1.1 to 1.6 shown in FIG. 1 is identical and is explained in greater detail in the spinning station 1.1 shown in FIG.

As can be seen from the drawing in FIG. 4, each spinning station 1.1 to 1.6, in this case spinning station 1.1, has a spinning nozzle unit 2 . The spinning nozzle unit 2 comprises a spinning beam 2.2 whose underside supports a plurality of spinning nozzles 2.1. These spinning nozzles 2.1 are connected to spinning pumps 2.3. This spinning pump 2.3 is preferably designed as a multi-pump and is connected to each spinning nozzle 2.1. The spin pump 2.3 is connected via a melt inlet passage 2.4 to an extruder or another melt former (not shown).

A cooling unit 3 is arranged below the spinning nozzle unit 2 . This cooling unit 3 has a cooling cylinder 3.1 with gas-permeable walls in the blow chamber 3.3 in this embodiment. For each spinning nozzle a cooling cylinder 3.1 serves to accommodate and cool the filaments. Below the cooling sleeve 3.1 is a descending sleeve 3.2.

A collective unit 4 is arranged below the dropper 3.2. This collecting unit 4 has a plurality of thread guides 4.1. A yarn guide 4.1 is associated with the spinning nozzle 2.1 and collects the filaments to form a yarn. In this example the spinning nozzle unit 2 forms four threads. The number of threads is exemplary. Such a spinning nozzle unit 2 can therefore simultaneously form up to 32 yarns per spinning position 1.1 to 1.6.

An oil supply unit 5 is associated with the collective unit 4 . The individual threads of a thread group 8 are moistened by this oil supply unit 5 . The yarns are drawn off by the godet unit 6 as a yarn group 8 and supplied to the winding unit 7 . In this example, a godet unit 6 with two driven godets 6.1 is selected. Interlacing units 6.2 are arranged between the godets 6.1 with which the yarns of the yarn group 8 can be interlaced separately.

The winding unit 7 has a winding point 7.5 for each yarn of the yarn group 8. In FIG. A total of four winding points 7.5 extend along the winding spindle 7.1. The winding spindle 7.1 is held so as to protrude into the winding revolver 7.2. The winding revolver 7.2 carries two winding spindles 7.1. These winding spindles 7.1 are alternately guided in the winding area and the exchange area. Each winding point 7.5 is associated with one of a plurality of small deflecting rollers 7.6 for splitting and separating the thread group 8. FIG. These deflecting miniature rollers 7.6 are directly behind the godet unit 6. FIG. Each winding point 7.5 has a traverse unit 7.3 for winding and laying the yarn to form a package. This traverse unit 7.3 cooperates with a pressure roller 7.4, which is arranged parallel to the winding spindle 7.1 and rotates on the machine frame 7.7. supported as possible. During the winding of the yarn 8 to form the package 19, the pressure roller 7.4 rests against the surface of the package 19. As shown in FIG.

1 and 4, spinning stations 1.1 to 1.6 are positioned in their normal operating state. In normal operating conditions, at each spinning station 1.1 to 1.6 a group 8 of yarns is extruded, withdrawn and continuously wound to form a package 19. FIG.

In order to be able to operate the spinning stations 1.1 to 1.6 at the start of the process and at process interruptions, the spinning stations 1.1 to 1.6 are assigned an automatic control device 9. . In FIG. 1 the automatic manipulator 9 is shown in the standby position. The automatic operating device 9 is held by a guide unit 12 above the operating passage 21 . The guide unit 12 is formed in this example by a suspension track 12.1. This suspension track 12.1 runs parallel to the machine longitudinal side of the spinning stations 1.1 to 1.6.

In order to explain the automatic manipulator 9, additional reference is made below to FIGS. FIG. 2 shows an enlarged and partially sectioned front view of an automatic manipulator such as that shown in the spinning unit shown in FIG. FIG. 3 shows a section through the lint bin 10 integrated into the automatic manipulator 9 . FIG. 5 shows a side view of the automatic manipulator as shown in FIG. 4, also enlarged. The following description applies to all drawings, unless explicitly associated with one of the drawings.

The manipulator 9 has a carrier frame 9.1. This carrier frame 9.1 is held on a suspension track 12.1. The carrier frame 9.1 is connected to the running frame 9.4. The running frame 9.4 is guided in the suspension track 12.1. Conveying means 9.3 are associated with the running frame 9.4. With this transport means 9.3, the automatic manipulator 9 can travel in the suspension track 12.1. The suspension track 12.1 has two guide rails 12.2 for this purpose. The conveying means 9.3 are connected to the automatic control device 11. As shown in FIG. An automatic control device 11 schematically illustrated on the top side of the carrier frame 9.1 is connected to a machine control device (not shown in detail).

A robot arm 9.2 is held at the lower end of the carrier frame 9.1. The robot arm 9.2 has a freely projecting guide end. At this guide end the suction injector 20 is guided. The protruding articulated robot arm 9.2 is freely movable by means of actuators and sensors (not shown in detail) and the movement of the robot arm 9.2 is controlled by the automatic controller 11. FIG. The power supply to the automatic manipulator 9 preferably takes place via a current rail or energy chain.

In order to operate the suction injector 20, the automatic manipulator 9 cooperates with the connection station 13 at each spinning position 1.1-1.6. FIG. 5 shows the connection station 13 of the spinning station 1.1. For the description of the connection station 13 additional reference is made to FIG. FIG. 6 shows the connection of the manipulator 9 to the connection station 13 via the connection adapter 13.2.

As can be seen from FIGS. 5 and 6, the connection adapter 13.2 is arranged on the carrier frame 9.1 of the manipulator 9. As shown in FIG. A connection adapter 13.2 is coupled to the actuator 13.3. The actuator 13.3 reciprocates to couple the connection adapter 13.2 to one of the plurality of connection stations 13. As shown in FIG. FIG. 5 shows the manipulator 9 held in the standby position and thus not connected to the connection station 13 .

In FIG. 6 the connection adapter 12.2 is shown coupled to the connection station 13. FIG. The connection station 13 has a compressed air connection 13.1. This compressed air connection 13.1 is connected via a central compressed air line 16 to a central compressed air source (not shown). The connection adapter 13.2 is coupled with the compressed air connection 13.1 by means of an actuator 12.3. Actuator 13.3 is connected to automatic control device 11 . The connection adapter 13.2 is connected to the connection station 13 such that the compressed air line 15 arranged on the automatic operating device 9 is connected to the compressed air connection 13.1, for example by means of a plug-in connection. The compressed air line 15 is connected to a suction injector 20 so that this suction injector 20 is prepared for receiving the yarn group. A lint duct 14 connected to the suction injector 20 opens into the lint container 10 . The lint bin 10 is arranged for this purpose on a carrier frame 9.1 of the automatic manipulator 9. As shown in FIG.

Reference is made to FIGS. 2 and 3 for a detailed description of the lint bin 10. FIG. FIG. 2 shows a longitudinal section through the lint container 10, and FIG. 3 shows a transverse section. The following drawings refer to both drawings unless explicitly referred to as one of them.

The lint container 10 has a cyclone-shaped inner structure 10.1, in particular for the helical flow of the incoming lint stream. For this purpose, a tangentially formed container connection 10.2 is formed in the upper region of the lint container 10 . A lint line 14 is connected to this container connection 10.2. In the central area, the lint container 10 has an exhaust pipe piece 10.3 which projects into the interior. This exhaust pipe piece 10.3 forms an exhaust opening 10.4 at the casing end. Besides the exhaust pipe piece 10.3, the cyclone-shaped inner structure 10.1 is formed by the slightly conical cylindrical wall 10.5 of the lint container 10. As shown in FIG.

As can be seen in particular from FIG. 2, the underside of the lint container 10 is closed by a movable lint flap 10.6. The lint flap 10.6 is pivotable and is moved to open and close the lint container 10 by means of an actuator 10.7. Actuator 10.7 is connected to automatic control device 11 .

A filling level sensor 10.8 is arranged inside the lint bin 10. As shown in FIG. This filling level sensor 10.8 is connected to the automatic control device 11. As shown in FIG.

During operation of the automatic manipulator 9, the yarn groups supplied to the spinning stations 1.1 to 1.6 are tangentially fed to the container connection 10.2 via the lint line 14 as a lint stream into the lint container. 10. The vortex-like flow causes the lint to spirally lay in multiple layers within the lint receptacle. A very compact filling of the lint container is thus possible. The filling of the lint container 10 is monitored by a filling sensor 10.8 so that the lint container 10 can be emptied if necessary.

FIG. 6 shows the yarn group 8 at the spinning station 1.1 being guided by the suction injector 20 and the automatic manipulator 9 . The suction injector 20 is guided by the robot arm 9.2 of the automatic manipulator 9 for threading and threading the threads of the thread group through the godet unit 6 and the winding unit 7. FIG. During this period the swarm is continuously introduced into the lint container 10 as a lint stream. As soon as the operating steps in the spinning station 1.1 have ended, the automatic manipulator 9 is returned to its standby position, for example as shown in FIG.

In order to dispose of the lint contained in the lint container 10, the automatic manipulator 9 is associated with a collecting container 17 in the standby position. In FIG. 7 it is schematically illustrated how emptying of the lint container 10 can be carried out in a side view of the embodiment shown in FIG.

In the state illustrated in FIG. 7, the automatic operating device 9 is positioned at the standby position. In this state, the lint container 10 is associated with a collection container 17 . The collecting container 17 is fed into the automatic manipulator 9, for example, via a conveying means 18. As shown in FIG. As soon as the collecting container 17 assumes its lower position below the lint container, the actuator 10.7 is activated via the automatic control device 11 in order to open the lint flap 10.6. After opening the lint flap 10.6, the lint is automatically released from the lint container 10 and collected by the collecting container 17. FIG. Due to the slightly downwardly enlarged container cross section of the lint container 10 and of the conical cylindrical wall 10.5, complete emptying is possible without problems.

At this point, it should be emphasized that the container cross-section of the lint container 10 can also be elliptical.

Furthermore, the possibility arises of connecting the discharge opening 10.4 of the lint bin 10 to a source of underpressure in order to support the suction force and to accommodate the lint. As a result, a slight underpressure is created in the lint container 10, so that a strong suction flow can be created for removing and collecting the lint.

The melt spinning apparatus according to the invention is therefore distinguished by the fact that a process interruption and respective restart, in particular of one of the spinning stations, can be carried out automatically. The construction of the melt spinning apparatus according to the present invention is merely exemplary in the illustrated embodiment. An additional unit is therefore used for handling and guiding the thread group. Similarly, the configuration of the automatic operating device is also exemplary. The automatic manipulator can therefore alternatively be designed as a floor vehicle.

Claims (10)

A melt spinning apparatus for producing synthetic yarns, comprising a plurality of spinning stations (1.1-1.6) and an automatic operating device (9), wherein said spinning stations (1.1-1. 6) each have a spinning nozzle unit (2), a cooling unit (3), a godet unit (6) and a winding unit (7), said automatic operating device (9) are guided by a guide unit (12) parallel to the spinning positions (1.1-1.6) arranged in a row, and each spinning position (1.1-1.6) Moveable for threading, said automatically manipulating device (9) drives at least one suction injector (20) driven by compressed air to a group of threads in one of said spinning stations (1.1-1.6). and wherein said suction injector (20) is connected to a lint container (10), comprising:
In order for the lint container (10) to contain lint,
a conical wall (10.5) laterally surrounding the inside of said lint container (10) such that the cross section of the inside of said lint container (10) increases from top to bottom;
an exhaust pipe piece (10.3) arranged on top of said lint container (10);
, whereby the lint can be deposited in a spiral. A lint line (14) connected to the suction injector (20) is connected to the lint container (10) via a tangentially oriented container connection (10.2), and the 2. Melt spinning device according to claim 1, characterized in that a container connection (10.2) is formed in the upper region of the lint container (10). Melt spinning apparatus according to claim 1 or 2, characterized in that the upper surface of the lint container (10) has an evacuation opening (10.4). 4. Melt spinning apparatus according to claim 3, wherein a vacuum source is connected to said exhaust opening (10.4), said vacuum source being able to create a vacuum in said lint container (10). Said lint container (10) is held in a carrier frame (9.1) of said automatic manipulator (9), the underside of said lint container (10) being provided with a movable lint flap for opening and closing. Melt spinning apparatus according to any one of claims 1 to 4, comprising (10.6). A controllable actuator (10.7) is assigned to said lint flap (10.6), said actuator (10.7) being the automatic control device (11) of said automatic operating device (9). 6. The melt spinning apparatus of claim 5, wherein the melt spinning apparatus is connected to a A filling level sensor (10.8) is assigned to the lint container (10), with which filling level sensor (10.8) the degree of filling in the lint container (10) can be detected. 7. Melt spinning apparatus according to claim 6 , characterized in that said filling state sensor (10.8) is connected to said automatic control device (11). Each spinning position (1.1 to 1.6) is associated with one of a plurality of connection stations (13) each with a compressed air connection (13.1) for compressed air transmission. Melt spinning according to any one of claims 1 to 7, characterized in that said connection station (13.1) cooperates with a connection adapter (13.2) arranged on said automatic manipulator (9). Device. The guide unit (12) is formed by a suspension track (12.1) in which the manipulator (9) is guided and the manipulator (9) has a transport means (9.3) by means of which said automatic manipulator (9) can run on said suspension track (12.1) A melt spinning apparatus according to any one of the preceding claims. Said automatic manipulator (9) has a controllable robot arm (9.2) which at the free end of said robot arm (9.2) drives said suction injector (20) to said spinning station (1). Melt spinning apparatus according to any one of the preceding claims, wherein the godet unit (6) and the winding unit (7) of one of .1 to 1.6) are guided for winding a group of yarns. .

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