KR101957731B1 - Textile machine having a drafting unit and two fibre-material feeds - Google Patents

Textile machine having a drafting unit and two fibre-material feeds Download PDF

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Publication number
KR101957731B1
KR101957731B1 KR1020157003448A KR20157003448A KR101957731B1 KR 101957731 B1 KR101957731 B1 KR 101957731B1 KR 1020157003448 A KR1020157003448 A KR 1020157003448A KR 20157003448 A KR20157003448 A KR 20157003448A KR 101957731 B1 KR101957731 B1 KR 101957731B1
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South Korea
Prior art keywords
fiber material
unit
fibrous material
draft
fiber
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KR1020157003448A
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Korean (ko)
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KR20150030270A (en
Inventor
게르트 슈탈레커
볼커 제흘
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마쉬넨파브릭 리이터 아게
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/005—Arrangements for feeding or conveying the slivers to the drafting machine
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
    • D01H9/14—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements for preparing machines for doffing of yarns, e.g. raising cops prior to removal
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/14—Circular knitting machines with independently-movable needles with provision for incorporating loose fibres, e.g. in high-pile fabrics

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

A textile machine 1, in particular a rotary knitting machine, comprises a fiber material supply 3 for feeding a fiber material 2 to a draft unit 5, a draft unit 5 for drafting the fiber material into a thinner fiber material, , A processing unit connected downstream of the draft unit 5 for processing the fibrous material immediately after draft, in particular a knitting machine 4, and a sensor 8 for detecting defects in the fibrous material. The draft unit 5 is provided with a second fiber material supply unit 3 'and a switching device 9. When a defect is detected in the first fiber material 2, the fiber from the second fiber material supply unit 3' The substance 2 'may be fed to the draft unit 5 by the switching device 9. According to the method for feeding the fibrous material 2 to the draft unit 5 by a fabric process, in particular a rotary-knitting process, the fibrous material 2 is fed from the fibrous material supply 3 to the draft unit 5, And is processed in the processing unit disposed downstream of the draft unit 5, in particular, the knitting process. The fiber material 2 supplied to the draft unit 5 is monitored by the sensor 8 for the presence or absence of defects. The draft unit 5 is provided with a second fiber material supply part 3 'and a switching device 9. When a defect is detected in the first fiber material 2, the second fiber material supply part 3' (2 ') is supplied to the draft unit (5) by the switching device (9).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a textile machine having a draft unit,

The present invention relates to a textile machine, in particular to a spinning-knitting machine, which comprises a fiber material feed for feeding a fiber material to a drafting unit, A processing unit connected downstream of the draft unit for processing the fibrous material immediately after the draft, in particular a knitting device, and a defective portion in the fiber material, Lt; / RTI >

In a textile machine in which fiber material is supplied for general processing in a knitting machine from a plurality of feed parts, if the supply of the material is stopped due to breakage of the feed material or depletion of the feed material, great defects may occur in the finished product. Accordingly, DE 10 2005 031 079 A1 proposes a method for grasping the presence of a bundle of fibers in a rotary-knitting machine through a sensor provided upstream of the draft unit. If no fiber bundle was present, it was a way to stop the draft unit before it was depleted to cause defects in the finished product.

In the case of fabric products such as knitted or crocheted fabrics, the aim is to produce a homogeneous product without visible or thinner parts in the yarn. Defects, such as the appearance of thinner or thicker portions, occur due to uneven material dispensing to the textile machine or unevenness within the manufacturing process itself during spinning in a thread piecing process. Therefore, yarn cleaners are often used in yarn fabrication to identify defects in finished products after fabrication and to remove detected defects. Alternatively, a method of not pulling out a manufactured yarn is used before reaching a downstream processing step such as a rewinding process.

However, in a textile machine in which fiber material is fed into an additional processing system, such as a knitting unit, immediately after drafting, it is no longer possible to extract the finished article. Accordingly, DE 10 2007 052 190 A1 proposes a method of monitoring for defects in the fiber material fed into the draft unit. In this case, when a sheet defect of a fibrous material is detected through a sensor, a method has been proposed in which the fibrous material is separated, the defective portion is separated from the fibrous material, and the two ends of the fibrous material are connected. The monitored fiber material is fed to the draft unit through the intermediate storage area to prevent the spinning-knitting process from being stopped due to depletion of material in the draft unit during this cleaning process. However, if material is also depleted in this intermediate storage area, the entire process must also be stopped.

Accordingly, it is an object of the present invention to provide a textile machine in which the reliability of the supply of the fiber material to the draft unit of the textile machine is improved. The present invention also provides a corresponding method.

This object is achieved by the features set forth in the independent claims.

A textile machine, in particular a rotary-knitting machine, comprises a fiber material feed for feeding a fiber material to a drafting unit, the draft unit for drafting the fiber material to a thinner fiber material, A processing unit connected downstream to process the fiber material immediately after draft, in particular a knitting device, and a sensor for detecting defects in the fiber material. According to the present invention, a second fiber material supply unit and a changeover device are connected to the draft unit. When a defect is detected in the first fiber material supply unit, the fiber material is supplied from the second material supply unit to the draft unit do. According to the method of supplying the fibrous material to the draft unit in the fabric process, the fibrous material is supplied from the fibrous material supply unit to the draft unit, drafted in the draft unit, and processed again immediately after the draft in the processing unit connected downstream of the draft unit. The fiber material fed into the draft unit is monitored for defects by the sensor. According to the present invention, the second fiber material supply unit and the switching device are connected to the draft unit. When a defect is detected in the first fiber material supply unit, the fiber material is supplied from the second material supply unit to the draft unit. By retaining the second fiber material supply and switching to the second fiber material supply when a material defect is found in the fiber material or when the supply of fiber material is stopped, the reliability of the supply of the fiber material to the draft unit is ensured, . Thereby, the second fiber material supply unit can be implemented as a temporary supply unit for temporarily supplying the fiber material to the draft unit. Upon removal of the fiber material defect or after the first fiber material is depleted to replace the fiber material supply, the system returns to the first fiber material supply which is the main material supply. Therefore, the second fibrous material supply portion is only a provisional supply portion, so that it need not be monitored.

According to a preferred embodiment of the present invention, the switching device is provided with first and second feeds for the first and second fiber materials so that the fiber material can be fed from one of the two fiber material feeders alternately to the draft unit. Unit, and a controller for alternately activating the supply units.

The fiber material supply method includes the steps of: detecting a defect presence or absence of a defect in the fiber material of the two fiber material supply units; monitoring the presence or absence of a defect in the fiber material from the one of the two fiber material supply units .

The fabric machine preferably further comprises a second sensor for defect detection for the second fiber material. If a defect is detected in the fibrous material, the feeding unit connected thereto is interrupted by the control unit and at the same time another feeding unit can be operated by the control unit.

If a defect is detected in the fibrous material, the feed portion of the fibrous material is stopped, the fibrous material is separated, and the feed portion of the other fibrous material is activated. Then, the detected defect is corrected, and the supply of the fiber material to the draft unit is performed by the other fiber material supply unit.

It is particularly desirable to splice the fibrous material end of the infeed side of the supply unit to be newly activated with the fiber material end of the draft unit side of the supply unit to be interrupted before actually stopping the supply unit to be interrupted. In a textile machine, a splicer for connecting the ends of the fibrous material is disposed between the switching device and the draft unit for this purpose. The new fiber material can join the two fiber material ends using a splice to allow fresh fiber material to flow directly into the draft unit by the fiber material to be interrupted without causing new defects in the fiber material. On the other hand, when the fibrous material is depleted, the fiber material end of the feeding unit to be newly operated can be brought directly to the draft unit via the feeding unit or the feeding nozzle.

In order to correct detected defects, it is further preferred that at least one cleaning device be disposed between the supply units and the draft unit. Thus, switching to another fiber material supply portion and removal of defects can proceed fully automatically. However, defects of the fibrous material may be manually removed by the operator. Since the supply of the fibrous material to the draft unit is ensured by the other supply unit, elimination of defects does not need to occur immediately.

According to a preferred embodiment, the cleaning device comprises a separating device for the fibrous material, such as a grinding or milling device. Thereby, the fiber material can be cut with a pointed severance cut, and the cut fiber material can be bonded to other fiber material ends in a particularly desirable manner. However, the separating device may be implemented as a shear or twist nozzle, so that the fiber material can be separated by removing the twist. However, according to another embodiment of the present invention, if the supply unit is simply stopped and the fiber material is broken, the fiber material can be cut. If the geometric arrangement of the incoming pairs of feed units and of the draft unit matches the fiber length of the fibers present in the fibrous material, a defined sharpened cut may also be produced. It is further preferred that the removal device comprises a preparation device for preparing the fiber material ends. Using the preparation device, the fiber material ends can be optimally prepared in a reproducible manner to make the ends of the fiber material thin and pointed. Thus, a very uniform piecing point in the fibrous material can be obtained using a separating device and / or a preparation device.

According to a first embodiment of the present invention, feeding units for presenting fibrous material to a draft unit each comprise a pair of rollers, wherein at least one of the two rollers of the pair of rollers is driven to convey the fibrous material to the draft unit . At the same time when the drive stops, the roller pairs act as a clamping device. Thus, there is no need to further clamp the fibrous material, for example, when passing through the clearance cuts or preparing the fiber material ends. Nevertheless, the supply units can be implemented as a clamping device and an injection nozzle, respectively. In this case, the transfer of the fibrous material from the fibrous material supply is made directly by the inlet roller pair of the draft unit into which the fibrous material is introduced, the provision of the fibrous material at the draft unit entrance or joint is only possible Injection nozzle.

Thus, it is preferred that the clamping device is connected to a device for storing fiber material reserves. This may include, for example, a deflecting bail that deflects to store a defined length of the fibrous material and release the stored length upon subsequent delivery of the fibrous material by the injection nozzle. Thereby, a fiber material of the same length is reproducibly provided to the draft unit or the joint, so that a good piercing point can be created in the fibrous material.

According to another embodiment of the present invention, each of the supply units comprises two roller pairs through which a variable drafting of the fibrous material can be established. As a result, the ends of the fiber material can be made thin by drafting before joining. Thereby, both the fiber material end of the depleted fiber material and the fiber material end of the fiber material starting to operate can be drafted to create an optimal piercing point.

It is further preferred that the supply units are driven by a single drive. Thus, stopping and restarting the feeding units can be arbitrarily controlled in a particularly simple manner, as well as the draft setting for the feeding unit with two roller pairs. However, the supply units may be driven by a common drive, where each clutch can be switched on by the control unit to interrupt or restart the supply units.

In the textile machine, it is further preferred that the twisting device is connected upstream of the processing unit, in particular the knitting machine. The apparatus ensures that the process is performed with a particularly high stability by strengthening the drafted fiber material before knitting.

The second material supply and the switching device can be advantageously used in rotary machines as well as rotary machines. For example, if an uneven bundle of fibers is being rotated, the number of yarn clearances next can be greatly reduced if the bundles of fibers being fed are already being monitored.

Other features of the invention are set forth in the embodiments described below. Referring to the drawing, it is as follows:

1 shows a textile machine according to the present invention, which shows a general form of a rotary-knitting machine.
Fig. 2 shows a textile machine according to the invention at the time of conversion of the fibrous material supply.
Figure 3 illustrates a textile machine according to another embodiment of the present invention.
Figure 4 shows a textile machine according to an embodiment of the invention with a supply unit designed in yet another form.
Fig. 5 shows the textile machine of Fig. 4 during the removal process after the conversion of the fiber material supply is complete.
Figure 6 shows a feeding unit with a device for storing preliminary fiber material.
Figure 7 schematically shows the fiber mass distribution at the juncture point of the fibrous material.
Figure 8 schematically shows the fiber mass distribution at the point of connection of the fibrous material with a draft change.

Figure 1 schematically shows a textile machine 1 embodied in a rotary-knitting machine. The knitted fabric is produced by the textile machine 1 directly from the fibrous material 2 from the fibrous material supply 3, directly by the knitting machine 4, without the intermediate yarn making process. The fibrous material 2 is fed to the knitting machine 4 through a draft unit 5, which generally comprises a plurality of roller pairs 6, by driving the roller pairs 6 at different speeds, The fiber material 2 can be drafted.

The knitting machine 4 may be embodied as a circular knitting machine in which a plurality of fibrous materials 2 from a plurality of draft units 5 formed along the periphery of the knitting machine, for example, may be fed into a circular knitting machine . In the drawing, only one draft unit 5 is shown. A twisting organ 7 is additionally provided between the draft unit 5 and the knitting machine 4 which is capable of twisting the fiber material 2 drafted to the desired fineness, false twist to ensure the stability needed for the rotary-knitting process. Here, the fibrous material supply part 3 is a flyer roving or a bobbin with a preliminary yarn wound already containing a slight twist. The fibrous material supply 3 may also be in the form of a can to provide a twisted fiber bundle. The fiber material supply part 3 is monitored by the sensor 8 for the presence or absence of the fibrous material and the presence of a thinner or thicker part. These defects can cause visible defects in the finished product as well as reduce the stability of the subsequent spinning process.

According to the present invention, in order to secure the quality of the fiber material 2 supplied to the draft unit 5 and at the same time ensure a rotary-knitting process without interruption, the second fiber material supply part 3 ' 3, 3 ') are connected to the draft unit 5. When defects are detected in the first fibrous material 2, the switching device 9 performs the conversion from the first fibrous material supply part 3 to the second fibrous material supply part 3 '. Then, instead of the fibrous material 2 from the first fibrous material supplying portion 3, the second fibrous material 2 'from the second fibrous material supplying portion 3' is supplied to the draft unit via the switching device 9 do.

The switching device 9 comprises a supply unit 10,10'for each of the fibrous materials 2,2'and a control unit 11 for which the supply units 10,10'are activated . Here, each of the supply units 10, 10 'is formed by a pair of rollers 6, each of which is driven to supply the corresponding fiber material 2, 2' The supply of material 2, 2 'is performed.

The fibrous materials 2, 2 'of the fibrous material feeds 3, 3' are all defective by one sensor 8, 8 '. As shown, the fibrous material 2 is fed by the first feeding unit 10 in a state where the second feeding unit 10 'is stopped. When a defect is detected in the fibrous material 2, a corresponding signal is transmitted by the sensor 8 to the control unit 11, at which time the control unit stops the supply unit 10 of the first fibrous material 2 . By stopping the feeding unit 10, the fibrous material 2 is separated between the feeding unit 10 and the draft unit 5, and at this time, in the still unwound bundle of fibrous material 2, (19) is generated. At the same time, the second feeding unit 10 'for the second fibrous material 2' is actuated by the control unit 11 so that the second fibrous material 2 'is fed to the draft unit 5 from the second fibrous material feeding unit 3' (2 ').

Thus, as shown, a joining portion 12 is disposed between the feeding units 10, 10 'and the draft unit 5 so that the fiber material ends 19 of the second fibrous material 2' It is preferable to join the separated fiber material end 19 of the first fiber material 2 on the draft unit side. Thus, the second fiber material 2 'can be introduced into the draft unit 5 by the fiber material end 19 of the first fiber material 2 on the draft unit side. When the joining is completed, the fibrous material 2 'is fed from the second fibrous material feeding portion 3' to the draft unit 5 through the feeding unit 10 '. However, it is also possible that the fibrous substance end 19 of the fibrous substance 2 'is directly supplied to the draft unit when the fibrous substance end 19 of the first fibrous substance 2 on the draft unit side is being depleted.

Finally, a cleaning operation of the fibrous material 2 is performed to separate the detected defects from the fibrous material 2. In the simplest case, after the operator operates the feed unit 10, the defective fiber material 2 is taken out and cut, the fiber material end of the fiber material 2 is placed in the splicing device 12, Process and conversion to the first fibrous material 3 can be performed in sequence. During this process, the fiber material 2 'will be supplied to the draft unit 5, so that the feeding process is not interrupted.

However, as shown in Fig. 2, it is particularly preferable that the switching device automatically performs all processes such as switching, joining, and elimination of defects of the fibrous substance supply portions 3 and 3 '. To this end, the control unit 11 stops the connected supply units 10, 10 'via the control unit 11 and supplies the other supply units 10, 1', when the defect is caught in the fibrous material 2, 2 ' Controls the driving units of the switching device 9 and the supply units 10, 10 'in accordance with the signals of the sensors 8 so that they can be operated. Then, when the fiber material from the other feeding unit 10, 10 'is supplied to the draft unit 5 and the defect is detected again from the fiber material 2, 2' which is being supplied again, 3 ') is performed. To this end, a removal device 13 is provided with the joint 12, wherein the joint 12 and the removal device 13 can also be actuated by the control 11, as indicated by the dotted line.

There is shown a situation in which the feeding unit 10 is stopped after the defect is detected in the fibrous material 2 and the separation of the fibrous material 2 occurs between the draft unit 5 and the feeding unit 10. [ The fibrous material end 19 of the fibrous material 2 'is fed to the joining apparatus 12 by the feeding unit 10' and joined to the fibrous substance end 19 of the fibrous material 2 on the draft unit side do. The fiber material end 19 of the fibrous material 2 on the supply side is now fed by the control unit 11 to the removal device 13 which is a suction device for sucking the fiber material end 10 on the supply side, . Then, the control unit 11 activates the supply unit 10 so that the defective fiber material supplied from the fibrous substance supply unit 3 is discharged and transported by the suction. The feed unit 10 is then stopped and the fibrous material 19 of the fibrous material 2 still in the suction area is separated and ready for the next bonding process.

The cutting of the fibrous material 2 can occur in the simplest case, due to the tension effect of the suction part on clamping in the stopped feeding unit 10. If the suction portion is maintained in the ON state, the fiber material end 19 is tapered and ready for the next bonding process. 2, it is preferred that the removal device 13 comprises a separation device 14 which may be a shear device as well as the preparation device 15 . The preparation device 15 is preferably a pneumatic preparation device which uses finely aligned nozzles to taper the end of the fiber material. The piecing point of the fibrous material 2, 2 'having a uniform quality and thickness can be produced without defects in a reproducible manner using the separating device 14 and the preparation device 15. [ A single removal device 13 shown here can be used alternately to two fibrous materials 2, 2 '. However, it is also possible to provide a dedicated removal device 13 for each fibrous material 2, 2 '.

Fig. 3 shows a removal device 13 including the suction device shown in Fig. There is provided a separating device 14 for preparing the fiber material ends 19 at the same time by separating and preparing the sucked fiber material ends 19, 19 '. For example, a grinding device or a milling device may be used, the axis of rotation of which is oriented in the direction transverse to the fibrous material 2, 2 'so that a sharp cutting takes place. Therefore, a separate preparation unit 15 is not required. For the remaining components, reference will be made to the embodiment described with reference to Figures 1 and 2.

FIG. 7 schematically shows the fiber mass distribution of the piercing points of two fiber material ends 19 connected to each other. As can be seen, the two fibrous materials 2, 2 'have a very uniform mass distribution with respect to the length of the fibrous material ends 19, the length of the fibrous material ends 19, , 2 '). ≪ / RTI > Since the fiber material 2, 2 ', in this case the fiber material 2, is always separated between the feeding unit 10 and the draft unit 5 by cutting, the fiber material 2 is automatically A sharp fiber material end 19 is created. The fiber material end 19 of the bundle 2 'of fibers already defective has the same effect as that of the fiber material end 19, however, via the separating device 14 operating simultaneously as the preparation device 15 or the preparation device 15 Preparation is carried out. Thus, a very uniform piercing point is achieved which is thicker than negligible than the continuous fibrous material 2, 2 ', so that the finished article can have a very satisfactory appearance.

However, for fiber mass distribution and strength, it is also possible to optimize the piercing point between two fibrous materials 2, 2 '. To this end, according to FIG. 3, a switching device 9 is provided in which each supply unit 10, 10 'comprises two separately driven and controlled roller pairs 6. The driving portion of each pair of rollers 6 can be controlled using single-drive portions controlled by the control portion 11, or a controllable planetary gearbox and switchable clutches. By providing two pairs of rollers 6 each, a variable draft of the fibrous material 2, 2 'can be arbitrarily adjusted.

The firing points thus obtained are shown in FIG. 8, and FIG. 8, as in FIG. 7, shows fiber mass distributions along the lengths of the piercing points and the fiber ends 19. The situation is shown after a defect has been detected in the fibrous material 2 and the fibrous material 2 has been discontinued. However, unlike in FIG. 7, after the defect detection in the fibrous material 2, the feeding unit 10 is not immediately stopped, and the draft of the fibrous material end 19 is first corrected through the pair of rollers 6 The fiber mass at the fiber material end 19 is reduced. Then, the feed unit 10 is stopped, and then a pointed fiber material end 19 is produced in the final area 19c. The region 19a can be seen further, where the fiber mass gradually decreases and the region 19b has a constant but reduced fiber mass or increased draft.

The fibrous material end 19 of the fibrous material 2 'has a pointed end 19 as opposed to being prepared via the preparation device 15 or the corresponding separating device 14 before the previous removal process. The length of the fiber material end 19 prepared here also extends approximately along the length of the fibers present in the fibrous material 2, 2 '. However, the fiber material end 19 of the fibrous material 2 'may be tapered because a change in the draft occurs by the feeding unit 10'.

Another embodiment of the present invention is shown in Fig. In contrast to FIGS. 1 to 3, the feed units 10 and 10 'are provided as injection nozzles 20 and 20' each having one feed clamp 21 and 21 '. The situation shown is the case where the fiber bundle 2 'is supplied from the fibrous substance supply part 3'. This causes the supply clamp 21 'to open and the fibrous material 2' to flow into the draft unit 5 through the injection nozzle 20 '. As a result, the fibrous material 2 'flows directly through the inlet roller pair 6a of the draft unit. The injection nozzles 20, 20 'provide only ready fiber material ends 19, 19' after a feed conversion. When a defect is detected in the fibrous material 2 ', the feeding clamp 21' is closed and the fibrous material 2 'is broken between the feeding clamp 21' and the inflow roller pair 6a of the draft unit 5 Loses. The feed clamp 21 is opened at the same time and the fiber material end 19 of the previously prepared fibrous material 2 is now supplied to the joint 12 through the injection nozzle 20 with compressed air. The fibrous material end 19 of the supply side fibrous material 2 is joined to the draft unit side fibrous material end 19 at the joint portion 12 and introduced into the draft unit 5 by the draft unit side fibrous material end 19 do. The injection nozzle 20 can be switched off again because the fiber material 2 flows directly by the injection roller pair 6a of the draft unit 5. [ Then, the fibrous material 2 is supplied from the fibrous substance supply part 3.

Upon completion of the feed section switching, the removing device 13 is provided with the fibrous material 2 'and the feed clamp 21' is opened. The fibrous material end 19 'may be disposed in the removal device 13 through the injection nozzle 20'. However, depending on the design of the removal device 13, the fiber material end 19 'may also be inhaled directly by the suction device of the removal device 13. As shown in Figs. 2 and 3, defects may be removed through special units of the removal device 13. Fig. To cut the fibrous material 2, 2 ', a shear may be provided as the separating device 14, or a special preparation nozzle 22 (see FIG. 5) may be disposed in the removal device. As shown in FIG. 4, the preparation of the fiber material ends is carried out directly by the airflow of the injection nozzles 20, 20 '. The nozzles 20 and 20 'and the feed clamps 21 and 21' are adjusted to each other such that the fiber ends 19 and 19 'are tapered, Roughly corresponds to the length of the fibers. When the end of the fiber material is ready, the switching device 9 is ready for the next supply switching.

Fig. 5 shows a switching device 9 in which one supply clamp 21, 21 'and one injection nozzle 20, 20' are provided as supply units 10, 10 ', respectively. Unlike in FIG. 4, a separate preparation nozzle 22 is designed as a twist nozzle with an air supply disposed in the removal device 13 and opening tangentially. This embodiment is preferred when using a fibrous material supply having a twist, such as flyer roving. The preparation nozzle 22 creates a twist swirl in a direction opposite to the direction of rotation of the roving. The spinning of the fibrous material 2, 2 'is released by the preparation nozzle 22 and the separation of the fibrous material 2, 2' Together with the tensile force effect of suction. At the same time, the fiber end 19 can be made thinner by the preparation nozzle 22 until only the clamped fibers remain in the feed units 10, 10 ', with the tapered ends of the fiber material 19 Again corresponding to the length of the individual fibers. Thus, even for the pneumatic preparation of the fibrous material ends 19, an optimized piercing point can be achieved. After cutting and preparing the fibrous material, the injection nozzles 20, 20 'are used to provide the prepared fiber material ends 19 to the joints 12. These pneumatic preparation nozzles 22 are not limited to use with twisted fiber materials 2, 2 'and may be used with non-twisted fiber materials 2, 2', such as draw webs. For this purpose, a nozzle with no kink effect can be used as the preparation nozzle 22.

There is further provided an apparatus for storing a fiber material reserve 23 so as to accurately provide the fiber material ends 19 in a reproducible manner for embodiments having the supply units 10, 10 ' . For this purpose, the supply unit 10, 10 'comprises two supply clamps 21, 21' and a deflecting bail 24. The position of the deflection bail 24 at a given dispense of material is shown in dashed lines. After the defect detection, the fibrous material 2, 2 'is clamped by the feed clamp 21 shown on the right, whereby the fibrous material 2 (2') is sandwiched between the feeding unit 10, 10 'and the draft unit 5 , 2 ') of the first, second, The fiber material 2 is then deflected by the deflection bail 24 while the right supply clamps 21 and 21 'are closed and the left supply clamps 21 and 21' are opened, at which time a preliminary fiber material is produced. Then, the left supply clamps 21, 21 'are also closed. A situation has been shown in which a fiber material end 19, 19 'is provided to the abutment 12 after completion of the formation of the preliminary fiber material. When the right supply clamps 21 and 21 'are opened, the injection nozzles 20 and 20' are released and at the same time, the deflection bail 24 is guided rearwardly, whereby the stored preliminary fiber material is released. The left fiber material clamps 21 and 21 'are opened so that the fiber materials 2 and 2' are also directly discharged from the fiber material supply units 3 and 3 'by the draft unit 5.

The joining portion 12 is preferably a pneumatic joining device in which two halves are pivotally connected to each other. The prepared fiber material ends 19, 19 'can be provided in two parts divided by half of the corresponding joint by the corresponding supply units 10, 10'. The portion divided by half of the corresponding joint can then be pivotally rotated to the remaining portion divided by half of the joint where the fiber end 19 is still present on the draft unit side. The joining of the two fiber ends 19 can be performed by a twist nozzle. Thereby, it is not necessary to prepare the fiber material end 19 particularly on the draft unit side in joining the fiber material ends 19, because the clamping line of the feeding unit 10 and the pair of rollers 6a Because the defined fiber material ends 19 are produced only by tearing the fibrous materials 2, 2 'when the spacing between the clamping lines of the fibrous material 2, 2' is appropriate. Thus, the spacing distance is only slightly longer than the maximum fiber length of the fibers present in the fibrous material 2, 2 '.

The present invention should not be limited to the above-described embodiments. Further improvements and combinations which are technically understandable and considerable within the scope of the claims are also protected by the invention.

List of reference signs

1 Textile Machinery

2 fiber material

3 fiber material supply part

4 Knitting devices

5 draft units

6 roller pair

6a inlet roller pair

7 Twisted device

8 sensors

9 switching device

10 supply unit

11 control unit

12 joint

13 Removal device

14 Separator

15 Preparatory device

19 Textile ends

20 injection nozzle

21 Clamping device

22 Preparation nozzle

23 reserve textile material storage

24 deflection veil

Claims (19)

A first fiber material feeder 3 for feeding a first fiber material 2 to a draft unit 5, a draft unit 5 for drafting the first fiber material to a thinner fiber material, (1) comprising a processing unit (4) connected downstream of said first fiber material (2) for processing said thinner fiber material immediately after draft and a sensor (8) for detecting defects in said first fiber material )as,
When the second fiber material supply part 3 'and the switching device 9 are connected to the draft unit 5 and a defect is detected in the first fiber material 2, A second fibrous material 2 'is fed from the material supply 3' to the draft unit 5,
The switching device 9 comprises a first feeding unit 10 for feeding the first fibrous material 2 and a second feeding unit 10 'for feeding the second fibrous material 2' ,
Wherein the first and second fiber materials (2, 2 ') are fed from one of the first and second fiber material supplies (3, 3') alternately to the draft unit (5) A control unit 11 for alternately operating the supply units 10 and 10 'is further provided,
A second sensor (8 ') for detecting defects in the second fibrous material (2') is further provided, and if a defect is detected in one of the first and second fibrous material (2, 2 ' A corresponding one of the first and second supply units 10 and 10 'is interrupted by the control unit 11 and the other one of the first and second supply units 10 and 10' 11). ≪ / RTI > The method according to claim 1,
Characterized in that the textile machine (1) is a rotary-knitting machine. The method according to claim 1,
Characterized in that the processing unit (4) is a knitting machine. The method according to claim 1,
Characterized in that a joining portion (12) for joining the fiber material ends (19) is arranged between the switching device (9) and the draft unit (9). The method according to claim 1,
Characterized in that at least one removal device (13) is arranged between the first and second supply units (10, 10 ') and the draft unit (5) for removing the detected defects. 6. The method of claim 5,
Characterized in that the removal device (13) comprises a separation device (14) for the first and second fibrous material (2, 2 '), such as a grinding or milling device. The method according to claim 6,
Characterized in that the removal device (13) comprises a preparation device (15) for preparing the fiber material end (19). The method according to claim 1,
Characterized in that the first and second feeding units (10, 10 ') each comprise a pair of rollers (6). The method according to claim 1,
Characterized in that the first and second supply units (10, 10 ') each comprise a clamping device (21) and an injection nozzle (20). 10. The method of claim 9,
Characterized in that the clamping device (21) is connected to a device (23) for storing a preliminary fiber material. 11. The method according to any one of claims 1 to 10,
Characterized in that said first and second feeding units (10, 10 ') each comprise two pairs of rollers (6) capable of adjusting the variable draft of said first and second fibrous material (2, 2' As a textile machine. 11. The method according to any one of claims 1 to 10,
Characterized in that the fabric machine (1) comprises a twist device (7) connected upstream of the processing unit (4). A method for feeding a first fibrous material (2) to a draft unit (5) in a textile process, comprising the steps of feeding a first fibrous material (2) from a first fibrous material supply (3) , Drafting the first fiber material (2) in the draft unit (5), and immediately after performing a draft in a processing unit connected downstream of the draft unit (5) 1 < / RTI > fiber material (2) through the sensor (8)
When the second fibrous material supply part 3 'and the switching device 9 are connected to the draft unit 5 and a defect is detected in the first fibrous material 2, A second fibrous material 2 'is fed from the second fibrous material supply 3' to the draft unit 5,
The first and second fiber materials 2 and 2 'are supplied from the first and second fiber material supply units 3 and 3' to the draft unit 5 through the switching device 9 ,
The presence or absence of defects is monitored for the first and second fiber materials 2, 2 'from the first and second fiber material supplies 3, 3' and the first and second fiber materials 2, 2 ' , The supply of the fiber material in which the defect is detected is stopped, the fiber material in which the defect is detected is separated, and the supply of the other one of the first and second fiber materials 2, 2 '≪ / RTI > 14. The method of claim 13,
Characterized in that the fabric process is a rotary-knitting process. 14. The method of claim 13,
Characterized in that, after separation of the fiber material from which the defect has been detected, the detected defect in the fiber material is removed. 14. The method of claim 13,
Characterized in that the fiber material end (19) of the fiber material to be cut off and the fiber material which has just started to be fed are bonded before or during the feed interruption. 17. The method of claim 16,
Characterized in that a preliminary fiber material is formed prior to bonding. 17. The method of claim 16,
Characterized in that the fibrous material ends (19) are drafted before joining. 19. The method according to any one of claims 13 to 18,
Characterized in that the drafted fibrous material is reinforced through the twist device (7) before processing.
KR1020157003448A 2012-07-10 2013-07-01 Textile machine having a drafting unit and two fibre-material feeds KR101957731B1 (en)

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DE102012106189.0A DE102012106189A1 (en) 2012-07-10 2012-07-10 Textile machine with a drafting system and two fiber material templates
PCT/EP2013/063788 WO2014009189A1 (en) 2012-07-10 2013-07-01 Textile machine having a drafting unit and two fibre-material feeds

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DE102015102266A1 (en) 2015-02-18 2016-08-18 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Method for producing a knitted fabric
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CN110407028B (en) * 2019-08-16 2021-04-09 苏州甫腾智能科技有限公司 Textile machine thread feeding device for textile

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DE102012106189A1 (en) 2014-05-15
CN104411870A (en) 2015-03-11
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DE112013003501A5 (en) 2015-05-07

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