EP3371361A1

EP3371361A1 - Device and method for producing knitwear

Info

Publication number: EP3371361A1
Application number: EP16794746.4A
Authority: EP
Inventors: Johannes Barth; Michael Lau; Stephan Geiler; Hermann Schmodde
Original assignee: Terrot GmbH
Current assignee: Terrot GmbH
Priority date: 2015-11-05
Filing date: 2016-11-03
Publication date: 2018-09-12
Also published as: KR20180079433A; CN108495960A; JP2018536776A; US20180313009A1; DE102015119040A1; WO2017077481A1; TW201726996A

Abstract

The present invention relates to a device and a corresponding method for producing knitwear using a knitting machine and a roving warping and bonding unit, which comprises a roving supply unit having at least one roving, a drawing unit coupled with the roving supply unit, a spinning nozzle unit arranged downstream of the drawing unit in the roving conveyance direction of the device, configuring a fiber bonding path by means of pressurization, and a counter-rotating end thread tensioning roller pair limiting the fiber bonding path, arranged downstream of the spinning nozzle unit in the roving conveyance direction, wherein the device has at least one blowing device for blowing out of the spinning nozzle unit and/or of the drawing unit, and at least one suction device for suctioning loose fibers from the spinning nozzle unit and/or from the drawing unit. In the present invention, the suction device and the blowing device are connected to a blowing and suction system, wherein the suction device has a suction air purification unit comprising at least one blower device, and at least one suction air outlet of the suction air purification unit is connected to at least one air channel passing above the at least one end thread tensioning roller pair, which air channel has at least one channel opening which is aligned on or along the spinning nozzle unit and/or with or along the drawing unit.

Description

Apparatus and method for producing knitwear

The present invention relates to an apparatus for producing knitwear comprising a knitting machine and a roving warping and fastening unit comprising a roving supply unit having at least one roving, a drafting device coupled to the roving supply unit, a fiber setting section downstream of the drafting device in a roving conveying direction of the apparatus, by pressurized air The device has at least one blow-off device for blowing off the spinneret device and / or the drafting system and at least one suction device for extracting loose fibers from the spinneret device and / or the spooling device Drawframe has. The invention further relates to a method for producing knitwear, wherein at least one roving is fed to a drafting system by a Vorgarnvorratseinheit, an emerging from the drafting, warped roving is applied with a spinneret device on a fiber setting section with compressed air and thereby solidified, the fiber consolidation section by a counter-rotating Endfadenklemmwalzenpaar, through which the warped, solidified roving is clamped out, is limited, and one of the Endfadenklemmwalzenpaar exiting end thread of a knitting machine is supplied, wherein the spinneret and / or the drafting system is blown off with at least one blower and at the spinneret device and / or the drafting system is sucked with at least one suction suction air.

The document WO 2009/043187 A1 includes a device and a method for the production of knitwear, in which the knitting needles of a knitting machine directly a fiber structure is supplied. The fiber structure is warped to the desired fineness in a stretching system and then moderately consolidated by means of a pneumatically operated spinneret. Through the spinneret, the fiber structure is permanently solidified, wherein a core of the fiber structure is wrapped by overlapping and interlocked Umwindefasern each other. Then the transport-stable fiber structure is transported via a guide tube to the knitting needles. In the Guide tube is introduced to the output of the spinneret escaping air to assist in the transport of the fiber strand through the guide tube.

The production of knitwear by means of a so-called false-twist wire instead of a classic yarn offers the advantage that particularly cost-effective and soft-knit knitwear can be produced.

However, it is problematic in the production and use of such solidified fiber composites as in the publication WO 2009/043187 A1 that the smallest fiber particles, so-called lint, detach from the fiber structure due to the stretching, twisting or transporting of the fiber structure, resulting in contamination of the device and production environment and thus lead to process interruptions or health hazards to people.

The document WO 2009/043187 A1, however, does not take into account that fiber flow forms during the production and transport of the consolidated fiber structure, which can have a negative effect on the process sequence and thus on the process result. In particular, there is a risk in the device of document WO 2009/043187 A1 that the air emerging from the spinneret and afflicted with loose fiber residues causes blockages in the guide tube.

To avoid fiber fly, it is known from the prior art to use suction and blowing air devices for the removal of free fibers, in particular of the drafting and spinneret devices. Thus, document WO 2007/093166 A2 discloses a suction / blowing air device for removing free fibers from a drafting system. The suction / blowing air device has two nozzles, which are provided on both sides of output rollers of the drafting system. Blowing air is introduced into the tuyeres, as a result of which the rollers of the drafting system can be kept free of fluff as far as possible. The exiting blown air is deflected via patches, which are arranged on the back of the rollers of the drafting system, and fed via air ducts, which are formed on the bottom and top of the drafting enveloping housing and in which there is a slight negative pressure, a central exhaust. From the document DE 10 201 1 053 396 B3 a device and a method of the type mentioned are known with which knitted fabric can be produced directly from warped, consolidated roving, the intermediate stages of the classical yarn production, such as yarn formation, winding and possibly rewinding of Garnes, dropped. In order to achieve this, the document DE 10 201 1 053 396 B3 proposes to distort a roving in a drafting unit starting from a roving supply unit, subsequently to apply compressed air in a spinneret device and thereby solidify it, then to guide it through a pair of end nip rollers wherein the Endfadenklemmwalzenpaar limits the fiber consolidation section of the spinneret device, and to supply the warped, solidified roving directly thereafter a knitting point of a knitting machine. The roving is drawn in the drafting to a desired fineness and twisted by the spinnerets of the spinneret to a false twist, wherein a core of the fiber structure, in which the fibers are substantially free of twisting and substantially aligned parallel to each other, are wrapped by Umwindefasern. The spinneret pair downstream of the spinneret clamps the roving solidified by the spinneret and thus stops the false-thread formation at the nip, thereby avoiding direct roving of the looped fibers strengthening the core of the warped roving and the warped, consolidated roving over relatively long distances to the knitting needles of the knitting machine can be transported.

At the device known from the document DE 10 201 1 053 396 B3, a suction device for sucking loose fibers is provided. The suction units of the suction device used are connected downstream between the spinnerets of the spinning nozzle device, the spinneret device and provided on an output clamping roller pair of the drafting system and combined to form a conically designed suction channel. Through the suction of the fiber flow is derived centrally, being ensured by its conical shape uniform flow conditions over the system width.

For general cleaning of the device of the document DE 10 201 1 053 396 B3 is provided above the device provided a rotating fan device, with a uniform distribution of the non-sucked fiber flow is made. In addition, blowing devices are used, with which the flow of fibers in the front and in the rear part of the drafting system is blown off, thereby preventing the formation of fiber clumps. However, the fan device used has the disadvantage that influenced by the air turbulence generated by the amount of fiber at the drafting system output and thus Garnfeinheitsschwankungen can be caused. Also, the fan device and the additionally used blowing devices can lead to unwanted accumulations of fiber flow and a concomitant disturbance of the yarn formation process. This is counteracted in the document DE 10 201 1 053 396 B3 by corresponding Abdeckvorrichtungen at certain points of the device. However, this in turn has the disadvantage that at the areas covered by the covering devices in the process no fiber flow can be removed, so that it can lead to contamination of the device, the device must be stopped in order to eliminate it.

It is therefore the object of the present invention to provide an apparatus and a method for producing knitted fabric having a knitting machine and a roving warp and fastening unit, during which all device components essential to roving warping and roving strengthening are effectively and inexpensively kept clean during the manufacturing process be able to increase the reliability of the device can.

This object is achieved, on the one hand, by a device of the abovementioned type, in which the suction device and the blow-off device are connected to a blow-off and suction system, the suction device having a suction-air cleaning device with at least one fan device, and at least one exhaust-air outlet of the suction-air cleaning device having at least is connected to an over the at least one Endfadenklemmwalzenpaar extending air duct having at least one channel opening which is aligned on or along the spinneret means and / or on or along the drafting (es).

In the present invention, therefore, the suction device used is coupled to an exhaust air cleaning device whose purified exhaust air can be used as blow-off air for blowing off the spinneret device and / or the drafting system. This is possible in the present invention by the on the Absaugluftreinigungsvorrichtung provided fan device, by the one hand, in a direction of the vacuum required for suction and on the other hand, provided in the opposite direction of the overpressure required for blowing available. Thus, the device according to the invention comprises a self-contained suction and blow-off system composed of relatively few system components, which enables a targeted and effective blowing off of loose fibers and / or other loose particles from the spinneret device and / or the drafting system, a simultaneous, Reliable suction of the blown loose fibers through the suction device and also allows the cleaning and reuse of the extracted air. Since the direction of the blow-off air and the suction air is realized in the present invention by only one fan device, the extraction and blow-off system of the device according to the invention is structurally simple and space-saving feasible and cost operable.

Thus, according to the invention, the exhaust air cleaning device has at least one fan device, by means of which effect exhaust air drawn in with loose fibers and / or other loose particles from certain components of the device is sucked in and purified air is returned to the production process as blow-off air.

In the present invention, a fan device is understood to mean a turbomachine having at least one rotating impeller, through which air is conveyed and compressed, and which, during operation, has a suction side with negative pressure and a pressure side with overpressure. As a fan device, for example, a fan, a fan or a fan can be used. By the rotational movement of the at least one impeller of the fan device, an air flow is generated, which flows through the exhaust air outlet of the Absaugluftreinigungsvorrichtung in the air duct in the direction of at least one channel opening.

The air stream leaving the at least one channel opening is fed to the production process for blowing off loose fibers and other particles from the spinneret device and / or the drafting device. On the one hand, while the air flow generated by the fan device flows from purified air toward the channel opening, on the other hand, there is a negative pressure on the side of the suction air cleaning device opposite to the air channel. The negative pressure causes a suction, the air contaminated with loose fibers and / or other loose particles passes through at least one exhaust air inlet of the exhaust air cleaning device in the direction of the fan device. Accordingly, contaminated air is simultaneously sucked into the Absaugluftreinigungsvornchtung by the rotational movement of the fan device and discharged purified air from the Absaugluftreinigungsvornchtung. f

In the apparatus according to the invention, the fan device can be designed as axial, diagonal, radial, centrifugal or tangential fan. The fan device is preferably provided within a housing of the exhaust air purification device. The impeller of the fan device may comprise any number of blades whose shape and size can be selected specific to the application. The impeller of the fan device is driven by a drive motor, which may be integrated directly in the Absaugluftreinigungsvornchtung or au ßerhalb the Absaugluftreinigungsvornchtung is provided. The fan device is designed and / or operated with such a performance that the roving is damaged neither by the blow-off nor by the suction process.

The on the or along the spinneret and / or on or along the drafting aligned, located above the Endfadenklemmwalzenpaar air duct is supplied with the coming from the fan device, under pressure over blown air. From the at least one channel opening of the air channel, the blow-off air flows to the spinneret device and / or the drafting system, whereby existing loose fibers and other loose particles are blown down there.

In principle, the air duct can have a channel opening or else a plurality of channel openings. The arrangement, configuration, size and orientation of the at least one channel opening can be selected specifically for this application. Insofar as the air channel has a plurality of channel openings, they can be evenly spaced from one another or concentrated in at least one region of the air channel, for example the holes of a shower head.

However, particularly preferably, the air duct has only a single, continuous, along the spinneret and / or along the drafting (s) extending channel opening, whereby the blow-off air unhindered on the spinneret and / or the drafting system can flow and thus loose fibers or other particles from the spinnerets and / or the drafting rollers or from spaces between the spinnerets and / or between the drafting rollers can be optimally removed.

Then the exhausted loose fibers and / or other loose particles are sucked off with the suction device, whereby in particular the area of the spinneret device and / or the area of the drafting system are cleaned. In this case, at least one suction opening of the suction device is advantageously aligned directly in the direction of the spinneret device and / or the drafting system. The alignment of the suction device on the spinneret and / or the drafting system has the advantage that the loose fibers are sucked directly at the point where they arise predominantly, namely during the delay of the roving in the drafting and the twisting of the roving through the spinneret. By sucking off the loose fibers and at the same time other loose particles in particular a spread of the loose fibers can be prevented, whereby a clean production environment can be guaranteed and process interruptions due to contamination and human hazards due to loose fibers and other particles can be avoided.

With regard to the type of suction device used, no limits are set in the present invention. Thus, the suction device, for example, on the spinneret and / or the drafting rollers aligned suction air ducts or suction tubes have, which can be performed directly to the areas where particularly much fiber flow would be deposited. Such suction air ducts can be configured both as rigid pipes and as flexible hoses, the length and thickness of which are selected as far as possible so that the actual yarn production process can proceed undisturbed and as little material as possible is used for the suction pipes. It is also advantageous if the device according to the invention has a plurality of individual exhaust air ducts which are brought together to form a common exhaust air duct and which are aligned with different regions of the spinneret device and / or the drafting system.

The suction air ducts of the suction device are connected to at least one exhaust air inlet of the extraction air cleaning device, so that the exhaust air extracted from the exhaust air in this exhaust air contained loose fibers can be filtered out. The exhaust air purified in the exhaust air cleaning device is left out of the exhaust air purification device via the at least one exhaust air outlet, pressurized by the action of the fan device, flows into the air duct and is discharged therefrom as blow-off air.

It has proven to be particularly advantageous if the at least one channel opening of the air duct is oriented such that it is not only aligned with or along the spinneret device and / or on or along the drafting system, but also at least one Suction opening of the suction device.

The air duct may be in the form of a rigid or flexible pipe or pipe system. Preferably, the air duct is horizontal, ie parallel to the drafting rollers. The air duct can be fixedly mounted on the device according to the invention or else be variable in its height position, for example, to make the intensity of the blow-off variable and / or to facilitate maintenance of the device. In particular, in the formation of the air duct as a pipe system, the air duct can be configured such that of a main flow channel, which in turn can be composed of individual tubes or formed from a single tube, several branches, if necessary, in different orientations, depart, which make it possible to blow off different areas of the device.

It has proven to be particularly advantageous if a lint screening device which has a perforated drum with at least one lint filter layer provided around the perforated drum is provided on the negative pressure side of the ventilating device.

In this embodiment of the invention, the sucked, contaminated by fiber flow exhaust air for removing the loose fibers and other particles from the exhaust air is passed through the lint filter. The lint filter device has a perforated drum, that is to say an internally hollow, cylindrical drum with holes provided in the drum circumference, that is to say the cylinder jacket. Through the holes of the perforated drum prevails around the perforating drum, which is coupled with its drum base to the negative pressure side of the fan device, negative pressure. As a result, the polluted exhaust air is sucked next to the drum circumference. To the drum circumference, so to the cylinder shell, the at least one Flusensieblage is provided. The lint filter layer forms a lint filter for the polluted exhaust air. The lint filter layer is more closely meshed than the hole structure of the perforated drum, so has openings with a smaller diameter than the diameter of the holes in the perforated drum, so that lint remain on the lint filter layer and are not sucked into the interior of the perforated drum. The lint filter layer may be formed, for example, as a filter wire mesh.

The lint filter layer is preferably replaceable. Thus, it is possible, in particular in the formation of the lint filter as a perforated drum, to replace the lint filter used by a lint filter with other properties, for example with openings with different diameters and / or a different number of openings. This has been found to be particularly advantageous with regard to the production and use of different yarns with different properties. Furthermore, replacement of the perforated drum but also in case of defect of the perforated drum or to clean the perforated drum advantageous.

In a particularly favorable embodiment of the present invention, in an inner peripheral region of the perforated drum, a holeless diaphragm and the diaphragm opposite, au Shen on the perforating drum a stripping device provided. Due to the holeless aperture prevails at that Au ßenumfangsbereich the perforating drum, which is the aperture, no negative pressure. So here no polluted exhaust air is sucked. In this way, in this area, a wiper of the wiper device can easily be guided up to the lint line layer lying on the outer periphery of the perforated drum, in order to strip the latter from it. For this purpose, the scraper preferably extends over the entire length of the perforated drum.

In optional design variants of the device according to the invention, other devices for cleaning the lint screen device may also be provided within the suction air cleaning device, so that, for example, the lint filter layer does not have to be removed from the suction air cleaning device for its cleaning. For example, as a lint screen cleaning device instead of the stripping device described above, a suction or flushing device can be used. The lint filter used in each case can be used with a central len dirt pick-up device connected

Particularly preferably, the lint screen device can be coupled or coupled to a monitoring device, which provides a user of the device according to the invention with information about the contamination or air permeability of the lint screen device. For example, it can be displayed by means of the monitoring device if the lint filter device is blocked and / or has to be cleaned. Further, a defect of the lint filter device or the like may also be displayed by means of the monitoring device.

In a further expedient embodiment of the device according to the invention, a sprocket for adjusting the hole drum position relative to the stripping device is provided around the inner circumference of the perforated drum. In the ring gear, an adjusting member introduced, whereby the perforating drum can be moved by a rotation angle. In this case, the stripping device scrapes off a part of the lint fleece deposited in the process on the lint filter device in accordance with the angle of rotation.

In an advantageous embodiment of the present invention, the device has an auxiliary yarn feed, by which at least one auxiliary thread can be fed to the drafting system, wherein the at least one air duct extends at least partially over the auxiliary yarn feed and has at least one channel opening which is aligned with or along the auxiliary yarn feed is.

Through the use of an auxiliary thread, the strength of the knitting machine fed, warped, solidified roving can be increased and the reliability of the executed on the device according to the invention process can be increased. If an auxiliary layer is supplied to the roving treated in the device according to the invention, a core-sheath yarn is produced, the core being formed by the auxiliary thread. The auxiliary thread used can be an inelastic or an elastic thread. Preferably, the auxiliary yarn feeding on a realized by an output roller pair of the drafting hood deduction, whereby the auxiliary thread can be picked up by the pair of output rollers of the drafting and incorporated into the warped roving. The auxiliary thread can, for example, with the help of provided in the auxiliary thread supply auxiliary thread clamping rollers to the stretched be transported.

In order to protect the auxiliary yarn feeding or at least individual components of the auxiliary yarn feeding, such as the auxiliary yarn clamping rollers, against loose fibers or other loose particles and thus to ensure a permanently reliable functioning of the auxiliary yarn supply, it has proved to be advantageous to design the air duct such that at least one Part of the effluent from the air duct, cleaned air can hit the auxiliary yarn feed. For this purpose, at least one channel opening provided in the air channel is aligned with the auxiliary thread feed. Furthermore, however, a plurality of channel openings can also be aligned with the auxiliary thread feed. Likewise, a branch can also depart from the air duct, which is aligned directly with the auxiliary yarn feed and has at least one channel opening.

Insofar as the air duct and the suction air duct has a plurality of openings and / or branches through which air can flow, in the apparatus according to the invention an air duct system may be provided in the air duct and / or the suction air duct, which as required individual openings and / or branches of the Air duct and / or the suction air duct closes or opens and thus allows a targeted, appropriate flow of air.

In a favorable development of the device according to the invention, the exhaust air cleaning device is a Sammelabsaugluftreinigungseinrichtung, in which all provided on the device exhaust devices open.

By merging the contaminated by the individual suction air in a single Absaugluftreinigungseinrichtung the exhaust air of the device can be processed centrally and forwarded to the desired locations as blowdown. The central treatment of the air, the cost of the device according to the invention and the maintenance and repair costs of the device can be kept low.

In particular, when using a central Absaugluftreinigungseinrichtung it makes sense to use a previously described air duct system. In order to ensure uniform flow conditions over the system width of the device according to the invention, a suction collecting channel extending parallel to the air duct and tapering over its length is preferably provided between the suction air cleaning device and at least one suction duct of the suction device.

The object of the present invention is further achieved by a method of the abovementioned type, in which the exhaust air is conducted to a Absaugluftreinigungsein- direction in which at least one fan device on the one hand a negative pressure is generated, are derived by the loose fibers from the exhaust air, and on the other hand the purified exhaust air obtained from the exhaust air is pressurized, the purified exhaust air under pressure from the exhaust air purifier into at least one air duct passing over the at least one pair of end thread clamp rollers and at least one duct opening of the air duct forming at least one is directed along or along the spinneret and / or on or along the drafting (es) aligned air curtain.

In the method according to the invention are by means of the suction loose fibers, which are separated due to the process of yarn production, in particular by a rotation of air jets in the spinneret device of the treated roving, from the apparatus on which the inventive method is carried out and / or Suctioned environment of this device. Advantageously, the loose fibers as well as other particles are sucked off by the drafting unit pulling the roving and / or by the spinning nozzle device twisting and consolidating the roving. By sucking loose fibers and / or other loose particles, it is possible to avoid spreading them and thus contaminating the production environment, whereby the process stability can be increased.

For sucking off the air contaminated with loose fibers and / or other loose particles, the exhaust air cleaning device, to which the exhaust air is passed on, at least one fan device, which by generating a negative pressure, the contaminated air from the device or from the environment of the device on which the process of the invention is carried out, sucks.

The air purified in the suction air cleaning device of fibers and other particles is conducted by means of an overpressure generated by the fan device into an air duct emanating from the suction cleaning device, which runs along the end thread clamping roller pair.

To convey the air, the fan device has a rotatable impeller. As a result of a rotational movement of the impeller, the air is conveyed, at the same time for compressing the air and establishing a pressure ratio between the suction and negative pressure side, ie that side of the fan device, is attracted to which contaminated air from the fan device, and a blower or overpressure side of the fan device, ie the side of the fan device, at which purified air is discharged comes.

The purified exhaust air passing through the air duct exits through at least one duct opening formed in the air duct and is directed to or along the spinneret assembly and / or onto or along the drafting apparatus (es) to form an air curtain. The air curtain is particularly effective when in the air duct only a single, continuous channel opening is formed, so that the air curtain like a continuous air towel on the spinneret device and / or the drafting system.

The air flowing on or along the spinneret and / or on or along the drafting equipment optimally blows loose fibers and other particles away from the apparatus and the treated roving, and thus easily removes the device and roving from lint, which causes the Further processing of the roving would possibly hinder, be cleaned. It has proved to be particularly advantageous if the air duct or the at least one channel opening is oriented such that the outflowing air after blowing off the spinneret, the drafting and / or the yarn and thus the absorption of fibers and other particles optimally an exhaust air inlet of Absaugluftreinigungseinrichtung can be sucked. In a particularly expedient embodiment of the method according to the invention, the suction air is passed through a lint filter coupled to the vacuum side of the at least one fan device, which has a perforated drum with at least one lint filter provided around the drum, whereby loose fibers contained in the suction air are collected by the lint filter become. The sucked air is freed from loose fibers and / or other loose particles as it flows through the lint filter. The cleaned air leaving the lint filter flows into the interior of the perforated drum and, guided by the overpressure built up by the fan device, is passed on into the at least one air duct.

In a special embodiment of the method according to the invention, the lint filter device can be cleaned by a lint filter, the lint filter being able to be freed from the collected fibers and / or other collected particles either by suction, rinsing, scouring or stripping. The aspirated, rinsed or stripped fibers and / or particles sucked off by the lint screening device can, for example, be forwarded to a central dirt collecting device.

The stripping a Flusschicht on the lint filter designed, for example, particularly effective when provided in an inner peripheral region of the perforated drum a holeless aperture, au Shen on the perforating drum, the diaphragm is provided opposite a stripping and around the inner circumference of the perforated drum a sprocket is provided wherein at intervals by means of the ring gear, the hole drum position is adjusted relative to the stripping device.

Furthermore, it has been found to be advantageous if the lint screening device is monitored by means of a monitoring device, wherein it can be displayed by the monitoring device, for example, if the lint screen device is clogged, has to be cleaned or if there is a defect on the lint filter device.

In a particularly preferred embodiment of the method according to the invention, the at least one air channel also extends over at least one auxiliary thread feed, and at least one air curtain is formed through at least one channel opening of the air channel aligned with or along the auxiliary thread feed.

By incorporating an auxiliary thread or a so-called core thread in the roving, the stability of the roving can be increased and thus the reliability of the knitting process can be increased. For this purpose, the auxiliary thread is supplied to the roving in the drafting system in a preferred embodiment of the method according to the invention. It is particularly practicable if the auxiliary thread is withdrawn by a pair of output rollers of the drafting, whereby the auxiliary thread can be easily inserted between the fibers of the warped by the drafting roving. Furthermore, however, the auxiliary thread can be supplied to the roving in another embodiment of the method according to the invention at another point. For the gentle transport of the auxiliary thread to the roving, the auxiliary thread can also be conveyed with the aid of at least one auxiliary thread pinch roller pair encompassed by the auxiliary thread feed.

To ensure easy transport of the auxiliary thread to the roving as well as uncomplicated integration of the auxiliary thread in the roving the auxiliary yarn feed is applied to the cleaned, flowing out of the channel opening air. By blowing off the auxiliary yarn feed, fibers and other particles can be removed from the auxiliary yarn feed and the auxiliary yarn, and thus the process reliability of the process according to the invention can be increased.

According to a further preferred embodiment variant of the method according to the invention, the exhaust air sucked from the device is collected and passed to the exhaust air cleaning device, the cleaned exhaust air of which is passed over all the spinneret devices located on the device.

Advantageously, not only in the area of the drafting system and / or the spinneret device contaminated air is sucked off, but also in other areas of the device, whereby the cleanliness of the production environment and thus the process reliability can be further increased. In order to keep the costs as well as the maintenance and repair effort as low as possible, it has proved to be particularly advantageous if the exhaust air is directed to a common, central Absaugluftreinigungseinrich- device in which the contaminated air from loose fibers and / or loose Particles is released. The cleaned in the Absaugluftreinigungseinrichtung air can be forwarded in connection, for example, to the spinneret and / or the drafting system. Further, however, the cleaned air may also be used to blow off further components of the apparatus, auxiliary thread and / or roving to remove fibers and / or particles from them.

Preferred embodiments of the present invention, their structure, function and advantages are explained in more detail below with reference to figures, wherein

Figure 1 shows schematically details of an embodiment of a device according to the invention in a side view;

Figure 2 shows schematically the details of the device of Figure 1 in a front view;

FIG. 3 schematically shows an exemplary embodiment of a device according to the invention

Device usable perforated drum in a perspective view shows; and

Figure 4 shows schematically the perforated drum of Figure 3 in a front view.

The figures show schematically details of an embodiment of a device according to the invention for the production of knitwear. For the sake of clarity, in the figures, a variety of other machine details concerning, for example, the apparatus body, the media supply, the apparatus control, etc. are omitted in the figures. With regard to such details is hereby fully to the comments on the in the document DE 10 201 1 053 396 B3, which describes the basic structure of the device according to the invention, wherein the device according to the invention over the document DE 10 201 1 053 396 B3 changed blow-off and suction 1, whose elements are primarily shown in the figures described below.

FIG. 1 shows a section of the device according to the invention in a side view, while FIG. 2 shows the section of the inventive device shown in FIG. pointing direction in a side view.

The device according to the invention has a knitting machine, not shown in the figures, as well as a roving warping and hardening unit 10 supplying the knitting machine with warped, consolidated roving. The Vorgarnverzugs- and solidification unit 10 has a roving storage unit, also not shown in the figures, on which at least one roving is stored, for example, on at least one supply reel.

The Vorgarnverzugs- and solidification unit 10 further includes a drafting 5 for warping the Vorgarnvorratseinheit supplied to the drafting 5 roving on. The roving, not shown in the figures passes through the drafting 5 in a Vorgarnförderrichtung A, ie in the embodiment shown vertically from bottom to top.

The drafting device 5 used in the embodiment of Figures 1 and 2 has three fixed, continuous lower rollers 51 1, 521, 531, which in each case during operation of the device rotatable and with a lever arm 50 against the lower rollers 51 1, 521, 531 pushable rollers 512th , 522, 532 with formation of corresponding, designated in Figure 2 pairs of rollers 51, 52, 53 face. The rollers 512, 522, 532 may be, for example, rubber rollers.

The Vorgarnverzugs- and solidification unit 10 also has a the drafting 5 in the Vorgarnförderrichtung A downstream spinneret 6. With the spinneret device 6, a warped roving emerging from the drafting system 5 during operation of the device is subjected to compressed air on a fiber consolidation section and thereby solidified. The spinneret 6 consists in the embodiment shown of two, the warped roving in the Vorgarnförderrichtung A automatically promoting spinnerets 61, 62nd

The device according to the invention further comprises a suction device 1 1. In the exemplary embodiment shown in FIGS. 1 and 2, the suction device 1 1 has four suction channels 3 a, 3 b, 3 c, 3 d, by means of which loose fibers and / or loose particles at different points of the roving warping and hardening unit 10 of these can be sucked.

A first suction channel 3a is aligned with the lower roller 531 of the output roller pair 53 of the drafting system 5. In the embodiment shown, the suction channel 3a is aligned approximately at right angles to the Vorgarnförderrichtung A on the lower roller 531.

A second suction channel 3b is aligned with a region between the spinnerets 61, 62 of the spinneret 6 to remove loose fibers and / or loose particles from the spinnerets 61, 62. The suction channel 3b is aligned approximately at right angles to the Vorgarnförderrichtung A on the spinneret 6.

A third suction channel 3c is connected downstream of the spinneret device 6 in the roving conveying direction A.

A fourth suction channel 3d extends over the spinneret device 6, is bent over the spinneret device 6 and aligned obliquely from above onto the output roller pair 53 of the drafting device 5.

The suction channels 3a, 3b, 3c, 3d open into a common suction air duct 30, in which the suction air is discharged in the Absaugströmungsrichtung B and which opens into a Absaugluftreinigungseinrichtung 4 of the device. The suction-air cleaning device 4 is surrounded by a housing 41 in which a lint filter is provided. In the exemplary embodiment shown, the lint filter device has a perforated drum 7, that is to say a cylindrical, inner-hollow drum, in the cylinder jacket of which through-holes are provided. One possible embodiment of the perforated drum 7 is shown in a perspective view in FIG. 3 and in a front view in FIG. The perforated drum 7 may be formed, for example, of steel.

To the cylinder jacket of the perforated drum 7, a lint filter layer 70 is provided. The lint filter layer 70 has a plurality of through holes whose diameter is smaller than the diameter of the holes of the perforated drum 7. As a result, contained on the lint filter layer 70 in the exhaust air contained fiber flow, and in the Inside the perforated drum 7 only reaches the cleaned of the fiber flow exhaust air. The lint filter layer 71 can be formed, for example, as a cylindrical, knitted or knitted grid whose mesh sizes are so small that the loose fibers and / or other loose particles produced by the roving processing on the device according to the invention penetrate the grid into the interior of the perforated drum 7 be prevented. The lint filter layer 71 may be formed, for example, from a filter wire mesh.

Within the perforated drum 7, a shutter 71 is also arranged. The aperture 71 is located in the embodiment shown at the bottom of the perforated drum 7. Outside of the perforated drum 7, the aperture 71 opposite a acting on the cylinder jacket of the perforated drum 7 stripping device 72 is provided.

For sucking the contaminated with loose fibers and / or loose particles air at the Vorgarnverzugs- and solidification unit 10, a fan device 8 is then provided to an opening of a housing wall 41 1 of the housing 41. In this case, a negative pressure side of the fan device 8 in connection with the interior of the perforated drum 7, whose open drum bottom 73 opens into the opening of the housing wall 41 1, the fan device 8 opposite. Accordingly, a negative pressure is generated in the interior of the perforated drum 7 and also in the interior of the housing 41, resulting in a suction effect in the suction channels 30, 3a, 3b, 3c, 3d connected to the housing 41. The pressure side of the fan device 8 is au ßerhalb the housing 41, so au outside the housing 41, an overpressure arises, the pressure difference between the interior of the housing 41 and the space outside the housing to an air flow in the direction of the blower 9, as by the Arrow C shown leads.

The negative pressure side of the fan device 8 terminates flush in the embodiment shown in the figures around the open drum bottom 73 with the housing wall 41 1, but may also project beyond this or even into the interior of the suction air cleaning device 4 or into the perforated drum 7 protrude. However, the open drum bottom 73 may also have a larger diameter than the negative pressure side of the fan device 8. By rotational movement of at least one fan blade 81 of the fan device 8, a negative pressure is generated, which causes air from the suction air duct 30 and thus from the suction channels 3a, 3b, 3c, 3d is sucked in the direction of the fan device 8.

The extracted by the Vorgarnverzugs- and -festing unit 10 exhaust air flows initially due to the suction along the tapering in Absaugströmungsrichtung B exhaust air duct 30 and passes from this Absaugluftkkanal 30 via an exhaust inlet 42 into the Absaugluftreinigungseinrichtung 4. To a constant extraction speed over the entire length of the suction air duct 30, the suction air duct 30 opens within the Absaugluftreini- supply device 4 in a Absaugsammelkanal 43, which is parallel to the longitudinal extent of the air duct 9 and / or parallel to the longitudinal extent of the rollers of the drafting 5 extending longitudinal extent conical.

The Absaugsammelkanal 43 is opened in the direction of the interior of the housing 41. Inside the suction air cleaning device 4, the extracted air moves in the direction of the fan device 8 located on the housing wall 41 1, the extracted air flowing through the cylinder wall of the perforated drum 7 into the interior of the perforated drum 7. During this process, the suction air passes the lint filter layer 70 provided around the perforated drum 7. As the polluted air flows through the lint filter layer 70, the loose fibers and / or particles in the extracted air are filtered by the lint filter layer 70, so that exhaust air purified only from the flow of fibers and particles enters the interior of the perforated drum 7 and from there the fan device 8 flows.

Outside the exhaust air cleaning device 4, an overpressure is generated by the rotation of the fan blades 81, which causes the purified air flows from the interior of the perforated drum 7 through at least one exhaust outlet of the Absaugluftreinigungs- device 4 in the flow direction C in the air channel 90. In this case, at least one channel opening 91, which is preferably a single, continuous and parallel to the rollers of the drafting 5 extending channel opening of the air duct 90, as shown in Figure 1, aligned on the spinneret 6 and / or the drafting 5, so that the cleaned Exhaust air for blowing off loose fibers and / or other particles Tare of the drafting 5 and / or the spinneret 6 can be used. Thereafter, the blow-suction circuit of the present invention closes, in turn, by the blown from the drafting 5 and / or the spinneret 6 loose fibers and / or particles are sucked from the suction channels 3a, 3b, 3c, 3d.

By the treatment of the extracted air and the use of the purified air for blowing off the drafting 5 and / or the spinneret 6 in the present invention, an energy-cost device and a corresponding method is provided, by means of which easily and efficiently the drafting 5 and / or the spinneret device 6 can be freed from loose fibers and / or other particles.

To ensure a continuous air flow of purified air into the air channel 90 and thus out of the channel opening 91, is on the cylinder wall of the perforated drum 7, adjacent to the lint filter layer 71, a stripping 72, for example in the form of a wiper lip, for stripping a on the lint filter layer 71st accumulating lint fleece provided. The regular stripping of the loose fibers and / or other particles accumulated on the lint filter layer 71 prevents clogging of the passage openings of the lint filter layer 71 formed as a lattice network and thus ensures a continuous flow of air into the air duct 90.

As can be seen in Figure 1, the stripping 72 touches the lint filter layer 71 at least during the cleaning process in order to strip the accumulated on the Au ßenseite the lint filter layer 71 loose fibers and / or particles. Since the fibers and / or particles are firmly sucked on the lint filter layer 71 due to the negative pressure generated by the fan device 8 and thus their stripping with the stripping 72 is hindered by the negative pressure, the stripping device 72 is opposite, within the perforated drum 7, a holeless aperture 71st arranged. Through the aperture 71 is formed on the opposite side of the perforation drum 7 no negative pressure, whereby in this area the accumulated loose fibers and / or particles can be easily stripped from the lint filter layer 71. Helpful for the stripping of the lint layer on the lint filter layer 71 is a rotational movement of the perforated drum 7 with the lint filter layer 71 thereon relative to the stripping device 72.

In order to enable an uncomplicated turning of the perforated drum 7 with lint filter device 71, the perforated drum 7 in the exemplary embodiment shown in FIG. 3 has a toothed rim in the region of the open drum bottom 73. By engaging a not shown here, the sprocket 74 corresponding trained slider or other actuator in the ring gear 74, the perforated drum 7 together with the Flusensieblage 71 provided thereon can be rotated about the drum axis, ie the position of the perforated drum 7 relative to the stripping 72 for a facilitated Stripping the lint nonwoven be changed by the lint filter 71.

In a simple embodiment of the suction air cleaning device 4, the screen 71 can simply be inserted into the perforated drum 7 and thus automatically lies in a lower region of the perforating drum 7 due to gravity. The stripping device 72 is provided below the perforated drum 7. However, in other embodiments of the present invention, the aperture 71 may also be fixedly mounted in the exhaust air purification device 4. Insofar as the aperture 71 is fixedly provided in the suction-air cleaning device 4, it can also be provided at any other point on the circumference of the perforated drum 7; important here is merely that the wiper-type device 72 is arranged opposite the aperture 71.

Claims

W016955Ter / CS.LF claims

1 . An apparatus for producing knitwear comprising a knitting machine and a roving warping and fastening unit (10) comprising a roving supply unit having at least one roving, a drafting device (5) coupled to the roving supply unit, a drafting device (5) in a roving conveying direction (A) Device downstream, a Faserfestigungsstrecke by pressurization forming spinneret device (6) and one of the spinneret device (6) in the Vorgarnförderrichtung (A) downstream, the Faserverfestigungsstrecke limiting, counterrotatable Endfadenklemmwalzenpaar (12), wherein the device at least one blowing device (9) for blowing off the spinneret device (6) and / or the drafting device (5) and at least one suction device (1 1) for sucking loose fibers from the spinneret device (6) and / or the drafting device (5),

characterized,

in that the suction device (1 1) and the blow-off device (9) are connected to a blow-off and exhaust system (1), wherein the suction device (1 1) has an exhaust air-cleaning device (4) with at least one fan device (8), and at least an exhaust air outlet of the exhaust air cleaning device (4) is connected to at least one air duct (90) extending over the at least one end thread nip roller pair (12) having at least one duct opening (91) on or along the spinneret device (6) and / or on the or along the drafting device (es) (5) is aligned.

2. Apparatus according to claim 1, characterized in that on the negative pressure side of the fan device (8) a lint filter device, which has a perforated drum (7) with at least one around the perforated drum (7) provided lint filter layer (71) is provided.

3. A device according to claim 2, characterized in that in a Innenum- receiving area of the perforated drum (7) a holeless aperture (71) is provided and the diaphragm (71) opposite to the outside of the perforated drum (7) provided a stripping (72) is.

4. Apparatus according to claim 3, characterized in that around the inner circumference of the perforated drum (7) a sprocket (74) for adjusting the position of the perforated drum (7) relative to the stripping device (72) is provided.

5. The device according to at least one of the preceding claims, characterized in that the device has an auxiliary yarn feed (13) through which at least one auxiliary thread the drafting system (5) can be supplied, wherein the at least one air duct (90) at least partially over the auxiliary yarn feed (13) extends and has at least one channel opening (91) which is aligned with or along the auxiliary yarn feed (13).

6. The device according to at least one of the preceding claims, characterized in that the Absaugluftreinigungseinrichtung (4) is a Sammelabsaug- air cleaning device into which all provided on the device suction channels (3a, 3b, 3c, 3d, 30) open.

7. The device according to at least one of the preceding claims, characterized in that between the Absaugluftreinigungsvorrichtung (4) and at least one suction channel (3a, 3b, 3c, 3d, 30) of the suction device (1 1) a parallel to the air duct (90) extending, over its length tapered Absaugsammelkanal (43) is provided.

8. A process for the production of knitwear, wherein by a Vorgarnvorratseinheit at least one roving a drafting system (5) is fed, from the drafting system (5) emerging, warped roving with a spinneret device (6) acted upon on a fiber setting section with compressed air and thereby solidified wherein the fiber strengthening section is bounded by a counter-rotating end thread nip roller (12) through which the warped solidified roving is clamped, and a final thread leaving the end nip roller pair (12) is fed to a knitting machine, the spinneret device (6) and / or the drafting system (5) is blown off with at least one blow-off device (9) and attached to the spinneret device (6) and / or the Drafting system (5) with at least one suction device (1 1) exhaust air is sucked,

characterized,

in that the suction air is conducted to a suction air cleaning device (4) in which at least one fan device (8) generates a vacuum on the one hand, through which loose fibers are discharged from the suction air, and on the other hand the cleaned exhaust air obtained from the suction air is pressurized , the purified exhaust air under pressure from the suction air cleaning means (4) into at least one air duct (90) extending over the at least one pair of end thread clamp rollers (12) and through at least one duct opening (91) of the air duct (90) forming at least one directed along or along the spinneret means (6) and / or on or along the level of the streak) (5).

9. The method according to claim 8, characterized in that the suction air by a to the negative pressure side of the at least one fan device (8) coupled lint filter device having a perforated drum (7) with at least one around the perforated drum (7) provided lint filter layer (71), is passed, which are collected by the lint filter in the suction air contained loose fibers.

10. The method according to claim 9, characterized in that in an inner circumference range of the perforated drum (7) a holeless aperture (71) is provided on the outside of the perforated drum (7), the diaphragm (71) opposite a stripping (72) and on the inner circumference of the perforated drum (7) a sprocket (74) is provided, wherein at intervals by means of the ring gear (74) the position of the perforated drum (7) relative to the stripping (72) is adjusted.

1 1. Method according to at least one of claims 8 to 10, characterized in that the at least one air duct (90) also extends over an auxiliary yarn feed (13) and through at least one channel opening (91) of the air duct (90) at least one air curtain (14) on the or aligned along the auxiliary yarn feed (13).

2. The method according to at least one of claims 8 to 1 1, characterized in that the sucked on the device exhaust air collected to the suction air cleaning device (4) passed, the purified exhaust air is passed through all located on the device spinnerets (6).