DE102007053467A1 - Semi-automatic open end-rotor spinning machine operating method, involves utilizing suction nozzle during cross coil/empty case replacement, and automatically connecting pressure source of pressure system of coil if necessary - Google Patents

Abstract

The method involves producing a thread and a reeling device, by a spin device for producing a cross coil, where the cross coil has a thread memory nozzle subjected with negative pressure for receiving a thread quantity required in connection with a spinning process and a suction nozzle subjected with the negative pressure. The suction nozzle is used during a cross coil/empty case replacement, and a negative pressure source (42) of a spinning machine-private negative pressure system (41) of the cross coil is connected automatically if necessary. An independent claim is also included for a device for operating a semi-automatic open end-rotor spinning machine.

Description

The The invention relates to a method of operating an open-end rotor spinning machine according to the preamble of claim 1 or a Device according to claim 5.

Open-end rotor spinning machines, a variety of similar jobs, a central control unit and have a spinning machine's own vacuum system are in various, sometimes quite different embodiments known and described in detail in the patent literature.

On The jobs of such textile machines are each a preferably sliver presented in a sliver can by means of an open-end spinning device spun into a thread, which is then on a winding device is wound up into a cheese.

The However, different open-end rotor spinning machines differ both in terms of their design and their Working method partly considerably different from each other.

By the DE 198 36 065 A1 For example, open-end rotor spinning machines are known in which the working members of both the spinning devices and the winding devices are acted upon by machine-length drive means.

In the EP 1 283 288 A2 On the other hand, open-end rotor spinning machines are described in which the various working organs of the numerous work stations are each driven by a single motor.

In open-end rotor spinning machines, as used in the DE 198 36 065 A1 are described, the jobs are usually cared for by service units, patrolling along the jobs and automatically intervene when at one of the jobs an operating case, such as a thread break or a cheese / empty tube change occurs. Such as in the DE 198 27 605 A1 relatively detailed service units are not only relatively complicated in their structural design and therefore relatively expensive, but also limited in terms of their working capacity.

The means, if several operating cases at the same time or occur at short intervals, waiting times are on Hardly preventable for jobs.

The jobs of the EP 1 283 288 A2 open rotor spinning machine described are therefore designed so that they can resolve incidents, especially thread breaks, automatically.

The means, the mostly self-sufficient jobs of this known open-end rotor spinning show next to individual drives in the field of their spinning devices and their winding devices, respectively also a spinning station's own, single motor driven suction nozzle and a reversible driven by a single drive Thread withdrawal device on.

Furthermore These self-sufficient jobs each have over a piecing auxiliary device arranged in the region of the open-end rotor spinning device, in which one of the suction nozzle of the cross-wound bobbin returned Thread laid and prepared for rebinning can be.

Of others are so-called semi-automatic open-end rotor spinning machines known.

Such as in the DE 10 2005 036 485 A1 open rotor spinning machines described also have a variety of jobs, which are each equipped with a spinning device and a winding device.

The Spuleinrichtungen have, as is known, each over a creel for rotatably supporting a cross-wound bobbin, a Bobbin drive roller, a Fadenchangiereinrichtung and a device for lifting the cross-wound bobbin from the bobbin drive roller, wherein the Spool drive rollers and the Fadenchangiereinrichtungen preferably via Group drives are acted upon.

in the Area of the winding devices is also one each Braking device, such as a brake plate, arranged, the if necessary, a free rotation of the coil drive roller Prevented cross-wound bobbin prevented.

The Spinning devices have a rotor housing that can be pressurized with negative pressure, in which a spinning rotor rotates at high speed, as well a sliver-opening device with an opening roller and a sliver draw-in cylinder.

Of the Spinning rotor is for example in a support disk storage is stored and delivered via a machine-length tangential belt driven.

Also the opening roller is preferably over a Machine-long tangential belt applied while the sliver intake cylinder via a defined controllable Drive can be driven by a single motor.

Furthermore, the jobs have sol cher semi-automatic open-end rotor spinning machines each have a thread take-off device with a single motor, defined controllable drive, which, like the drive of the sliver feed cylinder, via a control line with a workstation's own control direction is connected.

In Thread running direction behind the thread withdrawal device is also a thread storage device, preferably one with negative pressure actable storage nozzle, provided, one related with a piecing process required amount of thread temporarily can save.

Of Further, in the field of work, one, many times Also referred to as third hand suction nozzle arranged, the also connected to the vacuum system of the textile machine and closed during the "normal" spinning operation is.

These Suction nozzles come in connection with cheese / empty tube changes used manually in semiautomatic spinning machines and where the spinning process takes place at the affected job is not interrupted.

The means, through the suction nozzle, in the spinning device Continuously further produced yarns are disposed of until he can be applied to the new empty tube.

There the opening of these suction nozzles, especially when several of these suction nozzles open simultaneously be, the air pressure in the negative pressure system of the spinning machine negative can influence the known semi-automatic Open rotor spinning machines via a second vacuum source, which can be switched on manually if necessary.

adversely in the embodiment described below a However, semiautomatic open-end rotor spinning machines is that the switch for activating the second vacuum source on the end frame or drive frame of the spinning machine is arranged.

The means the operator must, if several suction nozzles should be opened at the same time, first to one of the machine frames of the textile machine run and the switch on the second vacuum source.

The second vacuum source then provides a constant additional Negative pressure, which, if few or none of the suction nozzles are open, often too high, while the extra Negative pressure when a variety of suction nozzles simultaneously are often still too low is.

outgoing From the aforementioned prior art, the invention is the task to develop a method and a device by the / It can be ensured that in the vacuum system of an open-end rotor spinning machine, specifically at the suction nozzles of a semiautomatic open-end rotor spinning machine If necessary, an optimal vacuum is always present.

These The object is achieved by a method dissolved, as described in claim 1 or by a device according to claim 6.

advantageous Embodiments of the invention are the subject of the dependent claims.

The inventive method has in particular the Advantage that during the spinning process, the second vacuum source If necessary, it is automatically switched on immediately, so that on the suction nozzles at any time optimal vacuum ratio given are.

The is called, by the method according to the invention not only ensures that at the suction nozzles always a proper, for one Cheese coil / empty tube change sufficient negative pressure is present, but by the inventive method Also, the energy consumption of the textile machine is reduced because the drive of the second vacuum source is only switched on, if it is needed and remains switched on only so long how additional vacuum is needed.

According to claim 2 is provided in an advantageous embodiment that the drive of the second vacuum source according to the vacuum requirement is regulated, which occurs when one or more Cheese / empty tube change Suction nozzles open become.

The means, when opening a suction nozzle, is independent from the number of open suction nozzles, ensures that at each of the suction nozzles a sufficient negative pressure pending.

As described in claims 3 and 4, it is also provided in an advantageous embodiment, that the second vacuum source is controlled by the central control unit of the spinning machine, that is automatically switched on when at one or more job (s) of the open-end rotor spinning machine, a cheese / Empty tube change is pending. Since the central control unit of the textile machine is informed at all times about the run lengths of the individual cheeses of the numerous jobs, the second vacuum source can always be activated as needed so early that the operator at a cheese / empty tubes Change at the suction nozzles always optimal conditions finds.

The that is, the operator can keep on running in the spinning device produced thread easily passed to the suction nozzle, which in turn reliably disposes of the running thread, until the thread reaches a new, clamped by the operator in the creel Empty tube can be created.

As described in claim 5, is also advantageous provided that the air pressure in the separate vacuum channel, on the suction nozzles are connected, sensory monitored and the drive of the second negative pressure source as needed in the sense "Speed change" is controlled.

Of the running at optimum speed ensures in this way that the second vacuum source always exactly as much additional Negative pressure creates that by opening the suction nozzles unavoidable pressure losses reliably balanced become.

As described in claim 6, the open-end rotor spinning machine has over a main vacuum source as well as an on demand switchable second negative pressure source whose variable speed drive over a control line is connected to the central control unit.

A Such training enables a needs-based operation the second vacuum source, that is, it is on the one hand ensures that, if necessary, largely independent from the number of open suction nozzles, always sufficient vacuum is present at the suction nozzles, and it On the other hand, it is avoided that the second vacuum source unnecessarily is in operation or the drive of the second vacuum source with unnecessarily high speed is operated.

The defined driving the variable speed drive of the second Consequently, the vacuum source also has a positive effect on the energy consumption of the Textile machine off.

According to claim 7 is provided in an advantageous embodiment that the suction nozzles each on a machine side of the open-end rotor spinning machine over a common, separate vacuum channel with a filter chamber be connected to both the main vacuum source as also the second vacuum source are connected.

By the connection of the suction nozzles to a common, separate Vacuum channel ensures that short-term pressure fluctuations, as they are almost inevitable when opening the suction nozzles occur negatively on the case of proper Operating open-end spinning devices indispensable spinning vacuum of the open-end spinning machine.

As set forth in claim 8, the vacuum channels of two sides of the machine in an advantageous embodiment machine end connected. By such a machine end arranged connecting channel between the two vacuum channels the longitudinal sides of the machine can be the pressure loss at the suction nozzles, which are spaced far from the vacuum source, positive to be influenced.

The means, the pressure losses can be significantly reduced become.

By the training described in claim 9, with a in the area the vacuum channels arranged sensor, the in this Area prevailing air pressure detected and sent to the central control unit The open-end spinning machine can be connected as well be ensured that in the vacuum channel and thus at the suction nozzles always almost optimal pressure conditions are given.

The means it ensures that the pressure level neither can sink too far, nor that the negative pressure at the suction nozzles unnecessarily high.

As described in claim 10, the suction nozzles during the normal spinning / Spulprozesses closed.

The Suction nozzles are only opened when at the concerned Workstation a cross-bobbin / empty tube change is pending and then during the changing operation in the open-end spinning device continue to be disposed of temporarily produced thread got to.

The Invention is described below with reference to an illustrated in the drawings Embodiment explained in more detail.

It shows:

1 a side view of a workstation of a semi-automatic open-end rotor spinning machine, with a suction nozzle, which disposed during a cheese / Leerhülsenwechsels the continuously produced in the open-end spinning device thread,

2 schematically a plan view of the vacuum system according to the invention ausgebil semiautomatic open-end rotor spinning machine.

Semiautomatic open-end rotor spinning machines 1 wise, as in 1 represented a variety of jobs 2 on, each with a spinning device 3 and a winding device 33 are equipped.

In the spinning devices 3 becomes one in sliver cans 28 submitted sliver 34 each to a thread 30 spun, then on the winding device 33 to a cheese 22 is wound up.

The winding devices 33 each have a creel 21 for rotatably supporting the sleeve of a cross-wound bobbin 22 , a bobbin drive roller 23 , a Fadenchangiereinrichtung 26 and a lifting device 7 for lifting the cheese 22 from the bobbin drive roller 23 on. The lifting device 7 For example, it is designed as a thrust piston transmission, via a pneumatic line 24 into which a solenoid valve 17 is switched on, connected to a (not shown) overpressure source.

In the area of the winding device 33 Furthermore, a braking device (not shown) is arranged, through which, if necessary, a free rotation of the of the coil drive roller 23 lifted cheese 22 can be prevented.

In the present embodiment, the drive of the bobbin drive roller takes place 23 as a group drive.

That is, there is provided a machine-length drive shaft on which the individual reel drive rollers 23 are fixed. In an alternative embodiment, however, is also a single-motor drive of the bobbin drive roller 23 possible. In such a case, the drive of the bobbin drive roller is a corresponding control line to the spinning station's own control device 9 connected, in turn, via a bus system 60 with the central control unit 45 the open-end spinning machine 1 communicates.

The spinning device 3 Essentially, as known, has a spinning rotor 4 which rotates at high speed in a vacuum-pressurizable rotor housing and via a sliver-opening device with an opening roller 12 and a sliver draw cylinder 14 ,

According to the present embodiment, the spinning rotor 4 for example, in a support disk storage 5 is stored and delivered via a machine-length tangential belt 6 driven.

The opening roller 12 is preferably also via a machine-tangential belt 13 charged during the sliver draw cylinder 14 via a drive 15 is driven single motor.

The drive of the sliver feed cylinder 14 , for example, a stepper motor 15 , is via a control line 16 in a workstation's own control direction 9 connected.

Furthermore, the jobs have 2 each via a thread withdrawal device 18 whose drive 19 via a control line 20 also with the control direction 9 communicates.

In the field of spinning device 3 is also a stationary device 10 arranged, which is a defined cutting one manually from the cheese 22 retrieved thread allows. As in 1 further indicated, is the control device 9 that drive the lifting device 7 for lifting the cheese, the drive 16 the thread withdrawal device 18 as well as the drive 15 the sliver draw-in cylinder 14 controls, also via a signal line 29 with a switching element 27 connected.

That is, the controller 9 can via the switching element 27 to be activated.

In the thread running direction behind the thread withdrawal device 18 is a thread storage nozzle 37 arranged, via a pneumatic line 38 to the main vacuum channel 31 of in 2 schematically illustrated vacuum system 41 the open-end rotor spinning machine 1 connected.

In the pneumatic line 38 is a defined controllable blocking agent 35 turned on, by the control device 9 via signal line 36 is operable.

Each of the jobs 2 furthermore has a suction nozzle 25 , which is closed during the normal spinning process.

The suction nozzles 25 can be selectively opened, if necessary, in particular for the disposal of thread material.

This means that with a manual cheese / empty tube change, the opened suction nozzle can be used 25 the job in question 2 during the cheese / Leerhülsenwechsels of the spinning device 3 each consecutively further produced thread 30 until the thread is re-applied 30 to one in the creel 21 retained empty tube safely disposed of.

As in 2 as previously mentioned, are normally closed suction nozzles 25 each side of the machine to a common, separate vacuum channel 32 connected, with the vacuum channels 32 the two sides of the machine pneumatically connected end-to-end.

The two vacuum channels 32 open into the filter chamber 50 the vacuum system 41 the open-end rotor spinning machine 1 ,

To the filter chamber 50 passing through a partition in filter chamber parts 50A and 50B is split, except a main vacuum source 39 by an electric motor 46 is driven, an additional second vacuum source 42 connected, whose variable speed drive 43 via a control line 44 with the central control unit 45 the open-end rotor spinning machine 1 communicates.

As in 2 shown, the arrangement is chosen so that the filter chamber part 50A via the vacuum source 42 to the filter chamber part 50b connected constantly by the negative pressure of the main vacuum source 39 is charged.

Function of the semiautomatic open-end rotor spinning machine according to the invention:
During the regular spinning process, the spinner will be spinning 3 manufactured thread 30 through the thread withdrawal device 18 withdrawn and then on the winding device 33 to a cheese 22 wound. The between the arms of a creel 21 rotatably mounted cross-wound bobbin 22 lies with its surface on the bobbin drive roller 23 on and is driven by this via frictional engagement in the winding.

At the same time, the thread coming to the reel becomes 30 by means of the Fadenchangiereinrichtung 26 so laid that he in intersecting layers on the lateral surface of the cheese 22 runs.

If at one or more of the jobs 2 the open-end rotor spinning machine 1 a cross-coil / empty tube change is necessary, what the central control unit 45 the open-end spinning machine 1 is always informed by the central control unit 45 causes the drive 43 the second vacuum source 42 switched and thus the negative pressure in the separate vacuum channels 32 so far raised that at the suction nozzle 25 the relevant job (s) 2 always a predetermined negative pressure is given.

As the negative pressure in the area of the vacuum channels 32 sensory monitored and the variable speed drive 43 the second vacuum source 42 If necessary, there is a proper vacuum at the suction nozzles 25 even then ensures, if a larger number of suction nozzles 25 is opened at the same time.

That is, in the area of the vacuum channels 32 is a pressure sensor 47 arranged, via a signal line 48 to the central control unit 45 connected.

The central control unit 45 ensures that the variable speed drive 43 the second vacuum source is always raised to a speed level in which it is ensured that at all open suction nozzles 25 always enough negative pressure to pick up and dispose of a thread 30 ready.

The during a cheese / Leerhülsenwechsels of the spinning device 3 the job in question 2 continuously further produced thread 30 can thus until the re-application of the thread 30 to one in the creel 21 retained empty tube can be safely disposed of at any time.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19836065 A1 [0005, 0007]
• - EP 1283288 A2 [0006, 0009]
• - DE 19827605 A1 [0007]
• DE 102005036485 A1 [0013]

Claims (10)

A method for operating an open-end rotor spinning machine having a plurality of jobs, each having a spinner for producing a thread and a winding device for producing a cross-wound bobbin, and having a central control unit and a spinning machine's own vacuum system, in addition to a main vacuum source one as needed switchable second vacuum source, and in which in the work areas each acted upon by a vacuum yarn storage nozzle for receiving a required in connection with the piecing yarn amount and a vacuum acted upon suction nozzle, which is used in a cheese / empty tube change, are arranged, characterized characterized in that the second vacuum source ( 42 ) is automatically activated if necessary. Method according to claim 1, characterized in that the second vacuum source ( 42 ) according to the vacuum requirement of the suction nozzles ( 25 ) is regulated. Method according to claim 1 or 2, characterized in that the second vacuum source ( 42 ) from the central control unit ( 45 ) of the open-end rotor spinning machine ( 1 ) is driven. Method according to claim 1 or 2, characterized in that the drive ( 43 ) of the second vacuum source ( 42 ) is activated when at one or more jobs (s) ( 2 ) of the open-end rotor spinning machine ( 1 ) a cheese / empty tube change is pending. A method according to claim 1 or 2, characterized in that the negative pressure of a separate vacuum channel ( 32 ), to which the suction nozzles ( 25 ) and is monitored and that the drive ( 43 ) of the second vacuum source ( 42 ) is controlled in the sense of "speed change". Device of an open-end rotor spinning machine, which has a plurality of jobs, each having a spinning device for producing a thread and a winding device for producing a cross-wound bobbin, and having a central control unit and a spinning machine's own vacuum system, in addition to a main vacuum source a switchable if necessary second In the area of the work stations, in each case a yarn storage nozzle which can be subjected to negative pressure for receiving a quantity of yarn required in connection with the piecing process and a suction nozzle which can be acted upon by vacuum and which is used during a cheese / empty tube change, are arranged to carry out the process Method according to claim 1, characterized in that the open-end rotor spinning machine ( 1 ) a main vacuum source ( 39 ) and a second vacuum source ( 42 ), which has a variable-speed drive ( 43 ), wherein the drive ( 43 ) via a control line ( 44 ) with the central control unit ( 45 ) of the open-end rotor spinning machine ( 1 ) connected is. Apparatus according to claim 6, characterized in that the suction nozzles ( 25 ) of each machine side of the open-end rotor spinning machine ( 1 ) each via a common, separate vacuum channel ( 32 ) with a filter chamber ( 50 ) keep in touch. Apparatus according to claim 7, characterized in that on each machine side of the open-end rotor spinning machine ( 1 ) arranged vacuum channels ( 32 ) are connected machine end side. Apparatus according to claim 7, characterized in that in the region of the vacuum channels ( 32 ) at least one via a signal line ( 48 ) to the central control unit ( 45 ) connected sensor ( 47 ) arranged in the vacuum channels ( 32 ) prevailing negative pressure detected. Apparatus according to claim 6, characterized in that the suction nozzles ( 25 ) of the jobs ( 2 ) are closed during the normal spinning process.