JP4903142B2 - Method for redirecting the hook position of fibers of a group of fibers and apparatus for carrying out the method - Google Patents

Description

  The present invention relates to a method of changing the hook position of a fiber in a process line for processing a fiber material using a comb.

  In the fiber material processing step, a rear end hook is formed of a card. This can be understood from the document “Die Kurzstapelspinnerei von W. Klein; Band 1: Allgemein Technology der Kurzstapelspinnereiau The Textile Institute (pages 0.108-59)”.

  For example, a ring spinning machine is installed at the end of the process line, and yarn is formed by the ring spinning machine. In this case, the yarn is wound on a package. In order to produce the yarn on a ring spinning machine, particularly with regard to the drafting device, if the fiber material is provided as a roving yarn, the fiber still having a hook is provided in the configuration of a rear end hook. As a result, it is necessary to provide an odd number of different processing stages between the card and the ring spinning machine, and according to the premise that the hook position is maintained at each stage. This means that when drawing fiber material from an intermediate reservoir (eg, cans) installed at the processing stage, the fibers are fed in the reverse direction in subsequent process stages.

  In general, one draft is provided on each of the upstream and downstream sides of the comb, so that, in combination with the preparation machine and the flyer for forming the windings, an odd number between the card and the ring spinning machine This ensures the correct orientation of the hooks still present (rear end hooks).

  If one of the machines is omitted in the process line between the card and the ring spinning machine, appropriate precautions must be taken immediately so that the hook position is again correctly provided at the ring spinning machine. For example, if the required draft is already done on the card or comb itself, one of the draft stages can be omitted. The expression “notwendige Verstreckung” relates to a draft to achieve a high quality intermediate product (eg fiber bundles with the desired uniformity), which is subsequently processed in subsequent process steps. Is done.

  In order to achieve an appropriate orientation of the hook position, it has been proposed, for example, to transfer a fiber material (fiber bundle) sent to a can in one process step to another can (German Patent Application Publication No. No. 4136908). As a result, the withdrawal end of the fiber bundle is redirected for the subsequent process steps, so that at the end of the process, the hook position is again provided as a rear end hook in the ring spinning machine.

  Devices are also known in which the cans are filled from below and the fiber bundles are drawn from above, where the hook position is likewise maintained for the subsequent steps.

  Devices are also known which turn over the cans filled with fiber bundles in one process step, whereby the leading end of the previously fed fiber bundle is fed to the subsequent textile machine.

  Such a configuration is partly very expensive and is no longer economically acceptable based on the time criteria required today. In addition to this, additional equipment is required.

  The object of the present invention is therefore to provide a simple method or device in which the hook position can be changed in at least one process step of the process line.

  Even if there is an even number of machines between the card and the spinning machine that produces the yarn, it is desirable to ensure that the hook position in the supplied fiber material is provided to the spinning machine as a trailing hook, Moreover, no additional machine is used that affects the hook position between the machines that process the fiber material.

  This problem is solved by turning the hooks at the comb provided on the process line during the treatment process.

  Advantageously, the hook is turned prior to forming the combed fiber bundle following the combing process.

  Further advantageously, for combing the end of the fiber mass, which is fed stepwise in the comber and clamped, and then withdrawing the fibers from the end of the fiber mass, the fibers are formed into a fiber fleece. The trailing end of the fiber group is overlapped with the existing trailing end of the pre-drawn fiber group or the pre-provided fiber fleece. .

  Furthermore, it is proposed to adjust the direction of the leading end of the fiber group in the direction opposite to the conveying direction of the fiber fleece during or after the drawing, as viewed in the drawing direction.

  This is achieved, for example, by rotating the drawn fiber group at least 90 ° as viewed in the drawing direction before joining the end of the fiber fleece.

  Furthermore, this can be achieved by adjusting the leading end of the fiber group in the direction opposite to the direction in which the fiber fleece is conveyed during or after drawing, as viewed in the drawing direction.

  In this case, for example, the drawn fiber group can be rotated at least 90 ° as viewed in the drawing direction before being joined to the end of the fiber fleece.

  In order to carry out such a method, a comber is proposed which has means for turning the hook after the combing step and before forming the combed fiber bundle.

  In this case, the comb is equipped with a device for feeding the fiber mass to the comb, and the comb is adapted to comb the end of the fiber mass, which is fed in stages from the feeding device and clamped, The fiber group is drawn from the end of the fiber lump by a subsequent drawing device, and the drawing device includes a fiber group, an end of the previously drawn fiber group, and an end of a new fiber group. In this case, the rear end of the new fiber group is installed in the trailing direction of the previously drawn fiber group when viewed in the drawing direction. A further device is provided for overlapping the end or the end of the already formed fiber fleece.

  In known combs, the lap drawn from the wrap roll is provided by a supply roller via a nipper to a cylinder comb located below the nipper for combing. During the combing process, the reciprocating nipper is closed, in which case the wrap end (also called tuft) protruding from the nipper nip line (clamp line) is gripped and combed by the comb segment of the combing cylinder The The nipper is then pivoted to the forward position and released. In this case, the free end of the tuft reaches the region of the end of the previously formed fiber fleece, and the end of the fiber fleece is retracted by a predetermined value through the reverse movement of the detaching roller, thereby A group of fibers to be combed can be applied. In this contact process, the rotation direction of the detaching roller occurs again in the transport direction. The combed tuft is placed on the end of the fiber fleece in a roof tile shape with a predetermined overlap, and reaches the nip line of the detaching roller by the rotational movement of the detaching roller. During this process, as a rule, the top comb attached to the nipper enters the tuft. The top comb has the role of restraining the shell-like parts (Schalenteile), neps and noils that are present in the region of the tuft that is not gripped by the comb segments of the cylinder comb during the removal process. When the detaching roller further rotates, the fibers not gripped by the nippers but gripped by the nip line are drawn out as a fiber group and joined to the end portion of the fiber fleece through the clamping action of the detaching roller. This process is repeated for each nip grip. That is, it is necessary to reverse the rotation direction of the detaching roller before a new removal process or a contact process (joining process). This process needs to be performed 350-400 times per minute, depending on the size of the nip grip, so that on the one hand, the necessary rotational movement is performed on the one hand and on the other hand the high acceleration and reversal that occurs in this case. In order to control the movement, an expensive and stable transmission unit is required.

  Accordingly, a device is proposed here that can change the hook position on the one hand and avoid the described reverse movement on the other hand.

  In this case, a first means for rotation is provided, the first means is provided with an opening for ventilation along the circumference and along the circumference, and at least one part of the inner chamber of the first means The region is connected to a negative pressure source and a cover is provided, the cover forming a chamber separated from the surroundings between the drawer and the circumference of the first means to rotate. In this case, the separated partial region of the chamber is formed by the circumference of the first means and the extraction device.

  With such a device, the fiber group delivered from the detaching roller is reliably guided even with a relatively high number of nip grips, and after changing the hook position, the fiber group is applied to the end of the preformed fiber fleece. Can be attached (or joined).

  With such an embodiment, the contact process for the joining process and the turning process can be carried out in one room, and the air flow can be accurately controlled in this room, so that inconvenient air circulation that is not controlled is Avoided. As is apparent from practice, control of the air flow in the fiber region delivery region is important in order to achieve controlled joining and turning at relatively high delivery speeds.

  The expression “separated from the surroundings” does not mean that the required chamber is completely “airtight” sealed to the surrounding air. This means that another opening may be provided for the inflow of air, which serves in particular to recompensate the air mass sucked in via the negative pressure source. Such an opening may be provided, for example, between the defining part outside the cover and the drawing device. By mounting such openings in the desired manner, the air guide can be precisely adjusted or influenced with respect to the direction and application of the delivered fiber group.

  Advantageously, the separation of the chamber relative to the ambient air has a value between 80% and 99%, which ensures the replenishment of air from the surroundings into the closed chamber.

  The size of the opening ratio for the inflow of air into the closed chamber is adjusted, for example, according to the negative pressure required inside the chamber during the turning or joining process.

  Further, at least one second means is provided inside the rotating first means, and at least a partial region of the opening is provided at a time interval synchronized with the delivery of the fiber group via the second means. Free ventilation between the surrounding of the first means and the negative pressure source is controllable.

  With the negative pressure acting on the circumference of the first means at the exact time desired via the negative pressure source, the delivered fibers are held in place and then with the desired overlap and remaining hook orientation, It is placed on the end of the fiber fleece.

  Advantageously, the second means provided inside the first means are connected to the drive device and comprise at least one opening along the circumferential surface, the opening being substantially It extends across the width of the drawn fiber group, and a connection is formed between the vent opening of the first means and the negative pressure source via the opening. The second means serves as a kind of control element for the connection between the opening of the first means and the negative pressure source. In order to ensure the described synchronization, the drive means of the second means is drivingly coupled to the drive means of the drawer device.

  In order to ensure that the appropriate area is separated from the negative pressure source, it is proposed to additionally provide at least one cover element inside the first means.

  Advantageously, the first means comprise a rotatably supported suction drum, and the second means is arranged as a rotatably supported cylinder inside the suction drum.

To affect delivery airflow required I bets in the process, the rotational speed of the second means includes one or more times the value nip gripping the number of combed.

  By suitably forming the second means, particularly with respect to the number of openings distributed along the circumferential surface, the rotation speed of the second means has a value that is part of the nip gripping number of the comber. . What is necessary is just to guarantee the exact winning of the fiber group newly delivered each time.

  Depending on the specification, the rotational speed of the first means or the second means can be controlled or adjustable. In particular, the joining (joining interval) can be influenced by the change in the rotational speed of the second means.

  Furthermore, the rotation direction of the first means or the second means can be changed. In this case, the rotational directions of both means may be reversed.

  The cover element or elements can be placed inside the second means or, alternatively, between the first means and the second means. Such a cover means is provided in an area where the fiber fleece formed in the first means needs to be handed over, for example, to supply for subsequent processing.

  Further, the second means has two openings arranged so as to be shifted from each other along the peripheral surface, and is provided with at least two cover elements arranged so as to be shifted from each other. In this way, another embodiment can be realized.

  In order to ensure that the fiber fleece already formed along the circumference of the suction drum is gripped during transport, a plurality of other relatively small openings distributed along the circumference of the second means are provided. These openings simply extend over a partial area with respect to the width of the drawn fiber group. This creates a relatively small negative pressure continuously along the circumference of the suction drum, which is created in the gap between the suction drum and the cylinder. This is because this gap is continuously connected to the negative pressure source. The action of this relatively small negative pressure does not affect the delivery of the fibers from the removal device to the suction drum, and serves simply to hold the fiber fleece along the suction drum as already described.

  The cover can advantageously be formed from a transparent material, so that the operator can see this area and the cover does not have to be removed. This is advantageous for cleaning operations that occur in some cases or for recognizing the cause of the failure at a precise point in time.

  In order to prevent scattered fiber debris or other contaminants from accumulating in the cover area, at least a portion of the cover is made of an antistatic material.

  At least one adjustable element is provided in the area of the cover in order to actively and in a desired manner influence the air flow inside the isolated chamber, the adjustable element being separated Suitable for controlling at least one opening for the ventilation of ambient air between the chamber and the cover.

  In this case, the element consists of a flap that can be pivoted about a pivot axis, the flap extending substantially over the length of the drawing device when viewed transversely to the conveying direction of the fiber fleece. In this case, the pivot axis of the flap is preferably arranged in the region below the extraction device, and the free end of the flap faces the extraction device.

  In order to ensure that the fibers are fed reliably along the suction drum, the flap is mounted so that the free end of the flap forms a clamping position with the first means in the open position.

  Similarly, a cover (defining part) is provided between the drawing device and the circumference of the first means in order to interrupt inconvenient air circulation in the delivery area of the drawing device. Partially close free space.

  In order to take out the fiber fleece from the first means, the first means is provided with a take-out device for taking out the fiber fleece formed on the first means.

  Advantageously, an extraction device is arranged following the defining part of the cover.

  In this case, the take-out device may be a roller pair.

  It is also conceivable to provide a take-out device that directly cooperates with the suction drum.

  In order to form a fiber bundle for subsequent processing or to be sent to a can, the take-out device may be an apparatus that forms a fiber bundle. For example, a known fleece hopper for forming a fiber bundle is placed behind the roller pair.

  In order for the negative pressure of the negative pressure source to act mainly only in the area where the fiber group is applied, the radial spacing between the first means and the second means is kept relatively small, which is inconvenient. Air flow is avoided. In this case, the radial spacing between the suction drum and the cylinder has a value between 0.2 mm and 2 mm.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a configuration related to a known prior art. Here, the wrap 2 supplied from the nipper 1 is supplied to a drawing roller pair 5 (also called a detaching roller) through a supply cylinder 3. In this case, the tuft (Faserbart) 7 protruding from the open nipper 1 reaches the trailing end 8 of the top fleece (Kammzugvlies) or the fiber fleece 10, and thereby the pulling roller 5 moves forward based on the forward movement of the drawing roller 5. Reach the nip. In this case, fibers that are not retained by the wrap restraint force or nippers are removed from the wrap composite fibers. In this removal (pulling) process, the tuft is additionally pulled by the needle of the top comb 9. In this case, the top comb 9 combs the trailing portion of the tuft that has been drawn out, and also acts to constrain the nep and foreign matter. Based on the speed difference between the wrap 2 and the pulling speed of the detaching roller, the pulled tuft is stretched to a specific length. A guide roller pair 6 is arranged following the detaching roller pair. During the removal process, the leading end of the removed or drawn fiber group is overlapped or doubled with respect to the trailing end 8 of the fiber fleece 10. As soon as the removal or joining process (applying the combed tuft to the already formed top fleece) is finished, the nipper is retracted to the retracted position, where the nipper is closed and protrudes from the nipper The tuft 7 is provided to the comb segment 12 of the cylinder comb 13 for combing. When the nipper 1 returns to the advanced position again, the drawing roller 5 and the guide roller 6 perform a reverse movement, whereby the trailing end 8 of the fiber fleece 10 is retracted by a specified amount. This is necessary to achieve the superposition necessary for the joining process.

  FIG. 2 shows an embodiment in accordance with the invention, in which the drawing roller 5 no longer has to perform a reverse movement. In short, the fiber group P drawn from the drawing roller is intermittently transferred to the succeeding suction drum (Siebtrommel; screen drum) T under the influence of the air flow L, and to the end E of the fiber fleece V already formed. This will be explained in more detail below.

  As can be seen from FIG. 3, which is a sectional view taken along the line AA in FIG. 2, the suction drum T is rotatably supported on the flange 21 via the bearing 20. The flange 21 is fixedly coupled to the cylinder Z. The cylinder Z is fixed to the shaft 24 through the flange 21 so as not to be relatively rotatable (that is, to rotate together). The shaft 24 is supported by the machine frame MG through a bearing 22 in a cantilever manner. Of course, the shaft 24 is fixed at an axial position (not shown). In the end region of the suction drum T where the bearing 20 is located, the belt pulley 26 is connected to the suction drum and at the same time forms a lateral closure for the ambient air. Via a belt 27 (not shown) wound around the belt pulley 26, the belt pulley 26 is driven via a drive wheel (not shown) that is drivingly coupled to the transmission G. The transmission is driven through a motor M, which is controlled by a control unit ST.

  Outside the inner chamber IR of the suction drum T, the drive wheel 30 is attached to the shaft 24 so as not to be relatively rotatable. The drive wheel 30 may be, for example, a gear, a chain wheel, or a belt pulley, and the drive wheel 30 is connected to the transmission device G via a drive connection portion 31 that is schematically shown.

  A passage 33 is formed in the machine frame MG on the end surface of the shaft 24 opposite to the support location 20. The tubular passage 33 extends at the end face 32 into the inner diameter of the cylinder Z and thus separates the inner chamber IR from the ambient air. A sealing element 38 may be provided between the fixed passage 33 and the rotating suction drum T for additional sealing. It is also possible to form this element as a bearing means and to support the suction drum T in the passage 33 additionally on the relevant side.

  A passage 34 connected to the negative pressure source Q communicates with the passage 33. The end surface 32 of the passage 33 projects into the suction drum T, and an opening 36 is provided in the end surface 32. Through the opening 36, as indicated by an arrow, an air flow is passed through the inner chamber of the suction drum. It is formed from the IR toward the negative pressure source Q.

  As schematically shown, the suction drum T includes a large number of openings 35, and the openings 35 are distributed and attached over the entire peripheral surface of the suction drum. Instead of a suction drum made of metal, plastic or other solid material with an opening in the peripheral surface, it is also conceivable to use a fabric or other fabric with a defined breathability. Such fabrics need to be properly stretched on the support structure.

  Cover elements A1 and A2 are fixed to the end surface 32 of the passage 33 via fixing means, for example, screws 37, and the cover elements A1 and A2 extend along the inner surface of the suction drum T, as can be seen from FIG. Extending over a section of the peripheral area.

  In this case, the cover elements A1 and A2 are arranged with a slight gap along the inner surface of the annularly extending cylinder Z. The cover elements A1, A2 can also be arranged between the suction drum T and the cylinder Z in a stationary manner.

  In the embodiment shown in FIG. 3, a relatively small radial distance a is provided between the suction drum T and the cylinder Z, and the distance a is 0.2 mm to 2 mm. As soon as the negative pressure source Q is switched on, a relatively small negative pressure is created in the free space in the radial direction between the suction drum T and the cylinder Z. This relatively small negative pressure, which will be described in detail later, serves to grip the fiber fleece V already formed on the suction drum, at least in the area where the cover elements A1, A2 are not attached. In order to always form a connection between the inner chamber IR connected to the negative pressure source Q and the radial free space between the drum T and the cylinder Z, a plurality of relatively small openings 53 are arranged around the cylinder Z. It is provided along the surface. The size and number of the openings 35 are selected so as not to adversely affect the applying process or the joining process along the suction drum T. In the illustrated embodiment, only three of such openings are shown on a straight line. A plurality of such openings 53 may be distributed along the circumferential surface of the cylinder Z. A portion of the suction drum T provided with the opening 35 can be connected to the negative pressure source Q via the opening S1 or S2 (FIG. 2) provided in the cylinder Z.

  The cover element A2 is mounted in the area of the take-out roller 40, so that the fiber fleece V can be taken out from the suction drum T via the driven roller 40 without problems. The fiber fleece V is fed from a roller to a subsequent fleece hopper (Vliestrichter) 41 where the fleece is bundled from a width B (FIG. 3) into a fiber bundle FB (comb fiber bundle). Such devices for fleece consolidation are already known in combs, cards or drafts and are therefore not described in detail here.

  The fiber bundle FB formed by the fleece hopper 41 is sent to the can 44 via the hopper wheel 43. It is also conceivable that the formed fiber bundle FB is transferred to a conveying table and supplied to a subsequent draft device (not shown) together with another fiber bundle of an adjacent combing head (Kaemmkopf). Another cover element A1 is arranged in the delivery area AG, which cover element A1 serves in particular for controlling the air flow in combination with the openings S1, S2, whereby the group of fibers is connected to a hook (Haekchen; In order to change (reverse) the position of the portion where the tip of the fiber is bent and formed into a bowl shape, it can be appropriately changed.

  A stationary hood 46 is attached above the suction drum T in order to control the air flow L which is important for the process of applying the fiber group P to the fleece V. As shown schematically in FIG. 3, the hood 46 includes a side wall 47, and the side wall 47 extends to the region of the circumferential surface U of the suction drum T on both ends of the hood 46. Thus, in combination with the peripheral surface U of the suction drum T and the drawing roller 5, a chamber AM separated from the surroundings is formed. The spacing between the hood 46 and the suction drum is reduced to the area of the subsequent take-off roller 40, thereby avoiding undesired airflow.

  Another hood 54 is provided below the suction drum T. The hood 54 is provided with a side wall 57 similar to the hood 46, and the side wall 57 extends to the suction drum T. In order to separate from the surroundings, the hood 54 is provided with a bent portion 54 a in one end region, and the bent portion 54 a has a very small distance from the circumferential surface U. The opposite end of the hood 54 extends to the peripheral surface of the upper roller of the drawing roller 5.

  The fiber fleece V is supplied from the roller 40 to the subsequent fleece hopper 41, where the fleece is grouped into a fiber bundle FB from the width B (FIG. 3). Such a device for fleece bundling is already known in many embodiments in combs, cards and drafts and will therefore not be described in detail here.

  The fiber bundle FB formed in the fleece hopper 41 is sent to the can 44 via the hopper wheel 43 or supplied to the subsequent drafting device along the conveying table together with another fiber bundle of the adjacent combing head. Can do.

  In the embodiment shown in FIG. 2, both the suction drum T and the cylinder Z have the same rotational direction that is counterclockwise. The circumferential speed of the cylinder Z coincides with the circumferential speed of the drawing roller 5. In other words, the rotation speed of the cylinder Z needs to rotate synchronously with the nip gripping (Kammspiel; combing and removing), so that the application process or the joining process is synchronized with the delivery of the fiber group. It can be carried out. It is also possible to select the number of rotations of the cylinder Z multiple times with respect to nip gripping, and synchronization is not lost. Similarly, the cylinder Z can be driven at a rotational speed at which the circumferential speed of the cylinder forms part of the circumferential speed of the drawing roller. In this case, the number of openings in the cylinder needs to be provided corresponding to the predetermined portion. For example, when the circumferential speed of the cylinder Z corresponds to a half of the circumferential speed of the drawing roller 5, the cylinder has twice as many openings S1 in order to perform the applying process. That is, when the cylinder Z rotates once, the joining process is performed twice.

  The number of rotations of the suction drum T is considerably lower than the number of rotations of the cylinder Z, and is appropriately adjusted for the application process. Along with the change in the rotational speed of the suction drum T, the joining interval or the overlap between the trailing end HE and the end E of the fiber group P can be changed.

  In the embodiment shown in FIG. 2, the leading end VE of the fiber group P already exists in the region of the suction drum T. The space between the hood 54 and the suction drum T is connected to the negative pressure source Q via the opening S2 of the rotating cylinder Z and the opening 35 of the suction drum T. The negative pressure source Q is connected to the control unit ST. Can be controlled via The air flow L1 generated thereby is adjusted to be opposite to the rotation direction of the suction drum, and acts so that the leading end VE of the fiber group P supplied from the drawing roller is displaced downward. In this case, the positioning of the opening S2 or S1 is precisely harmonized with the process of supplying the fiber group P by the drawing roller 5, whereby the described air flow can be formed. The opening S1 is still present behind the cover element A1 and therefore has no connection to the negative pressure source. The leading end VE is gripped on the circumferential surface U of the suction drum T by the air flow L1.

  In the subsequent method, the end HE of the fiber group P is released from the drawing roller 5. At the same time, the opening S1 moves outside the cover area of the cover element A1 and acts so that an air flow is formed by the connection with the negative pressure source and the opening 35, in this case the released end HE of the fiber group P Is placed on the end E of the fiber fleece V already formed or superposed on the end along the suction drum T in the rotational direction. The opening S2 is moved behind the cover element A1, thereby interrupting the air flow L1. This application process rotates the fiber group during application, thereby changing the hook position.

  This process is repeated for each nip grip, whereby a new fiber group P is constantly applied to the fiber fleece V at a constant rotation speed of the suction drum T, and the hook position is changed. As soon as a new end VE is fed from the drawing roller 5, the first opening S1 is located in the region of the hood 54 in order to form an air flow L1, and this air flow L1 draws the end VE into the suction It is displaced downward in the direction opposite to the drum rotation direction. As soon as the opening S1 is hidden behind the cover A1, this function is assumed by the opening S2 until the described process, where the trailing end HE of the fiber group P is released.

  The overlap of the trailing end HE of the fiber group P with the end E of the fiber fleece can be defined by the rotational speed of the suction drum T, as already described.

  The fiber fleece V is conveyed to the take-out area AB of the roller 40 by the rotational movement of the suction drum T, and a cover element A2 attached in a stationary manner is arranged there. This ensures that this region is separated from the negative pressure source Q, so that the fiber fleece can be lifted off the peripheral surface U without problems for transport to the nip line between the take-out rollers 40. . The fiber fleece V is handed over to the fleece hopper 41 via such a driven roller 40 (the driving device is not shown), and is likewise driven on the downstream side of the fleece hopper 41. 42 is arranged. In the fleece hopper 41, the fiber fleece V is gathered into a fiber bundle FB in a known manner, and the fiber bundle FB is pulled out by the take-out roller 42 and cylindrical in the can 44 via the hopper wheel 43 schematically shown. Sent to. The fiber bundle FB thus sent can then be conveyed to an open-end spinning machine equipped with a subsequent processing device, for example a flyer or can.

  The embodiment of FIGS. 2a and 2b differs from the embodiment of FIG. 2 or FIG. 3 by, for example, attaching a pivotable flap KL in the area of the cover 46, in which case the lower cover 54 is attached. Omitted.

  Combined with the appropriate side wall 47, the definition by the suction drum T and the drawing roller 5, the cover 46 forms a chamber AM which is substantially separated from the surrounding air, which has already been formed in the chamber AM. The process of turning and joining the subsequent fiber group P to the fiber fleece V is performed. In order to control this process relatively well even at relatively high transport speeds of the fibers, the embodiment of FIGS. 2a and 2b proposes the use of a flap KL, which is centered on the pivot axis SA. It is supported so that it can turn. In this case, the pivot axis SA can be attached to the machine frame or directly to the hood 46.

  For example, the swivel device 70 acts on the swivel axis SA that is pivotally supported on the side of the hood 46 or the machine frame on the side, and the swivel device 70 is operated by the control device ST via the track 72. The swivel device may be, for example, a cylinder pivotally attached to a lever that is coupled to the swivel shaft so as not to be relatively rotatable (that is, to rotate together). The control of the swivel device 70 is performed via the control device ST in synchronism with the movement of the drawing roller, or in particular in synchronism with the positions of the openings S1, S2 of the cylinder Z.

  In the position shown in FIG. 2a, the flap KL is in the closed position, where the free end of the flap is substantially in contact with the peripheral surface of the lower drawer roller 5a. That is, only a very small safety interval exists between the lower drawing roller 5a and the flap KL. The leading end VE of the fiber group P is displaced downward by the airflow acting on the arrow L. The end VE is adsorbed to the circumferential surface U of the suction drum T at an appropriate position of the negative pressure applied inside the suction drum and the opening S1 of the cylinder Z. In this case, the leading end VE of the fiber group P indicates the direction opposite to the rotation direction of the suction drum T. A gap 65 exists between the hood 46 and the upper drawing roller 5 b, and air can be replenished from the surroundings through the gap 65.

  The air flow L generated by the arrangement structure assures that the deflection of the fiber group and the placement of the leading end VE on the suction drum T can be carried out at a relatively high conveying speed without damaging the fiber mixture. The

As the cylinder Z further rotates, the opening S1 is moved to the rear of the cover A1 and is therefore separated from the negative pressure source Q. With the movement of the opening S 1, at the same time opening S2 is moved to the position shown in FIG. 2b, whereby is formed an air flow toward the take-out apparatus 60 and 61, for which suggested by arrow L. Simultaneously with the movement of the openings S1, S2, the turning device 70 is operated by the control device ST via the track 72 and exerts the turning of the flap KL to the position shown in FIG. 2b. This position is occupied immediately before the trailing end HE of the fiber group is released by the drawing roller 5.

  When the clamping position KS is formed between the suction drum T and the free end of the flap KL, the leading end VE of the fiber group is released to the suction drum T when the trailing end HE is released from the drawing roller. It is placed and securely held. Through the opening 90 formed by the swirling of the flap KL, another air flow is formed tangential to the direction of rotational movement of the suction drum T, and the released end HE thereby forms the already formed fiber. Overlapping with the trailing edge E of the fleece V.

  Due to this air flow L, the front region of the hood 46 is exposed to negative pressure through the opening S2 by an appropriate position of the opening S2. The air flow sucked in this case is replenished, for example, via the gap 65 present in part and mostly through the opening 90, as indicated by appropriate arrows. The second opening S1 is located behind the cover A1 and is therefore not working.

  When this process is finished, the flap KL is swiveled again to the position shown in FIG. 2a, so that again a new fiber group P can be supplied from the draw roller 5 for subsequent application. By using the flap KL, the fiber group joining process along the suction drum can be performed in a desired manner without any problem even when the transport speed of the fiber group is relatively high, and the fiber group is damaged during the contact process. It will never be.

  The air flow required for the contact process can be controlled or influenced via the flap KL in particular.

  Instead of the flap KL, it is also conceivable to install additional openings which can be opened and closed at a suitable time by means of a suitable device via a suitable control device.

  4 and 5 schematically show a process line PL between the card KA and the ring spinning machine RS. Here, it is shown how the hook positions of the hooks H of the individual fibers F are present in the individual process steps.

  In the known process line PL shown in FIG. 4, the fiber delivered from the card KA is conveyed with a rear end hook and delivered to the can K1. Kens K1 serves as a reservoir for the subsequent draft S1, where the fiber F reaches the draft S1 with a tip hook after being drawn from the cans K1. After the drafting process, the fiber material is sent to Kens K2, which serves as a reservoir for the subsequent winding device WM. After the fiber material is pulled out from the cans K2, the fiber material reaches the winding body forming machine WM by the rear end hook. The wrap wound body WW formed there is conveyed to the subsequent comb KM. The wrap fed out from the wrap winding body WW by the comb is provided with a fiber having a tip hook, and the tip hook is partially released along the comb. The fiber bundle formed by the comb has a tip hook that is still not resolved. The fiber bundle is sent to Kens K3, which serves as a reservoir for the subsequent second draft stage SII. After pulling out from Kens K3, the fiber still with the hook H is conveyed to the draft SII at the rear end hook. The fiber bundle formed by the draft SII is sent to Kens K4. Kens K4 is then conveyed to the flyer FL, and after the fiber bundle is pulled out from the cans K4, the flyer FL has fibers with a tip hook. The package SP formed by the flyer FL is then conveyed to a ring spinning machine for subsequent processing. In delivering the package SP to the ring spinning machine RS, the fibers still having the hooks H are provided at the rear end hooks, which is advantageous for the last processing step. This means that if a tip hook is provided, the processing steps in the ring spinning machine are impaired and in some cases the quality of the yarn production is impaired.

  Efforts are made to shorten the process line PL while maintaining a certain quality of the final product in order to rationalize and thus reduce costs. In this, it has already been proposed, for example, to omit the second draft stage SII. This is obtained, for example, by a regulated draft device at the comb. This eliminates one process step and thus the hooks still present are provided to the ring spinning machine as inconvenient tip hooks. Therefore, the present invention is applied, and it is proposed to change the hook position during the processing step in the comber KM, which is shown in FIG. In this case, the fiber delivered by the fiber bundle in the comber KM is provided by the rear end hook. In the subsequent production process in which the drafting device stage SII is omitted, the fiber finally reaches the ring spinning machine via the flyer FL at the rear end hook.

  Of course, it is also conceivable that the fiber material has a mixed form of rear end hooks and front end hooks as well as end hooks. When the rear end hook or the front end hook in the embodiment of the present invention is described, it is considered that the existing fiber mixture occupies most of the hook configuration.

  Combing is particularly suitable for turning the hook position in the processing step, and the fiber material can be separated into individual fiber groups and then turned appropriately.

It is the schematic which shows partially the drawer | drawing-out area | region or joining area | region of the comb in a prior art. 1 is a side view schematically showing an embodiment according to the present invention in the region of a drawing device; FIG. FIG. 6 is a side view schematically showing another embodiment of the present invention. FIG. 2b is a side view showing another state of the embodiment shown in FIG. 2a. It is sectional drawing along the AA line of FIG. It is a figure which shows a well-known process line roughly. It is a figure which shows schematically the process line by this invention.

Claims (27)

A method of turning the hook position of the fiber (F) of the fiber group (P),
In the comb, the fiber group (P) is delivered from the drawing device (5) to the device (T, Z) for forming the subsequent fiber fleece, and the trailing end (HE) of the drawn fiber group (P). In a method of superimposing the trailing edge (E) of the fiber fleece (V) already located in the device (T, Z) for forming the fiber fleece,
Fibers that are already positioned in the apparatus (T, Z) for forming the fiber fleece by adjusting the direction of the leading end (VE) of the drawn fiber group (P) in the direction opposite to the conveying direction of the fiber fleece (V) The superposition of the trailing end (E) of the fleece (V) and the trailing end (HE) of the drawn fiber group (P) is controlled by a controlled air flow formed in the delivery region (AG) ( L, L1), the method for changing the hook position of the fiber of the fiber group.   The leading end (VE) of the fiber group (P) is adjusted in the direction opposite to the conveying direction of the fiber fleece (V) during or after the drawing, as viewed in the drawing direction (AR). Method.   3. The method according to claim 2, wherein the drawn fiber groups (P) are rotated at least 90 [deg.] In the drawing direction before being combined with the end (E) of the fiber fleece.   Hold the leading end (VE) of the fiber group (P) by forming the clamp position (KS) before releasing the trailing end (HE) of the fiber group (P) by the drawing device (5). The method according to any one of claims 1 to 3. In an apparatus for carrying out the method of redirecting the hook position of the fibers (F) of the fiber group (P) according to claim 1,
The apparatus (T, Z) for forming the subsequent fiber fleece in the drawing device (5) comprises a first means (T) for rotation, the first means (T) being arranged around the circumference (U). Along the circumferential surface with an opening (35) for ventilation, at least one partial region of the inner chamber of the first means (T) is connected to the negative pressure source (Q), Covers (46, 47) are provided, which cover (46, 47) between the drawer (5) and the circumference (U) of the rotating first means (T) with respect to the surroundings A separated chamber (AM) is formed, and a partial region of the separated chamber (AM) is formed by the circumference (U) of the first means (T) and the drawing device (5). At least one second means (Z) is provided inside the first means (T) that rotates, and the second means (Z) Then, at a time interval synchronized with the delivery of the fiber group (P), at least between the periphery of the first means (T) and the negative pressure source (Q) through the partial region of the opening (35). A device for carrying out the method for redirecting the hook position of the fibers (F) of the group of fibers (P), characterized in that the free ventilation is controllable.   6. The device according to claim 5, wherein the separation of the chamber (AM) with respect to ambient air has a value between 80% and 99%. The second means (Z) is connected to the driving device (M, G) and has at least one opening (S1, S2) along the peripheral surface, and the opening (S1, S2). negative pressure but extends over the width (B) of the argument can issued the fiber group (P), through said opening (S1, S2), and the vent opening (35) of said first means (T) 6. The device according to claim 5, wherein a connection is made with the source (Q).   At least one cover element (A1, A2) arranged in a stationary manner is attached to the inside of the first means (T), and the cover element (A1, A2) is drawn out from the drawn fiber group (P The device according to claim 7, wherein a partial area of the vent opening (35) of the first means (T) is separated from the negative pressure source (Q) over a width (B) of the first means (T).   The first means is composed of a suction drum (T) rotatably supported, and the second means is a cylinder (Z) rotatably supported inside the suction drum (T). 9. A device according to claim 7 or 8, which is arranged.   The device according to any one of claims 7 to 9, wherein the rotational speed of the second means (Z) has a value that is one or more times the number of nip grips of the comb (KM).   The device according to any one of claims 7 to 9, wherein the rotational speed of the second means (Z) has a value that is a part of the nip gripping number of the comber (KM).   12. A means (ST, M, G) for controlling or adjusting the rotational speed of said first means and / or second means (T, Z) is provided. apparatus.   13. A means (ST, M, G) for adjusting the direction of rotation of the first means and / or the second means (T, Z) is provided. The device described.   14. Device according to any one of claims 8 to 13, wherein a cover element (A1, A2) is arranged inside the second means (Z).   The second means (Z) has two openings (S1, S2) that are shifted from each other along the peripheral surface, and at least two cover elements (A1, A2) that are shifted from each other. 8. The apparatus according to claim 7, wherein:   A plurality of other relatively small openings (53) distributed along the peripheral surface of the second means (Z) are provided, and these openings (53) are simply the widths of the drawn fiber groups. 8. The device according to claim 7, wherein the device extends over a partial area.   6. The device according to claim 5, wherein at least part of the cover (46, 47, 54, 57) is made of a transparent material.   18. Device according to claim 5 or 17, wherein at least part of the cover (46, 54) is made of an antistatic material.   In the region of the cover (46, 47), at least one adjustable element (KL) is provided, which is divided into a separate chamber (AM) and a cover (46, 47). 19. A device according to any one of claims 5 to 18, which is suitable for controlling at least one opening (90) for the ventilation of ambient air between them. The element (KL) is composed of a flap (KL) that can be swiveled around a swivel axis (SA), and the flap (KL) is pulled laterally with respect to the conveying direction of the fiber fleece (V). 20. The device according to claim 19, which extends over the length of the dispensing device (5).   21. The device according to claim 20, wherein the pivot (SA) of the flap (KL) is arranged in a region below the extraction device (5) and the free end (KE) of the flap faces the extraction device. .   21. Apparatus according to claim 20, wherein the free end (KE) of the flap (KL) forms a clamping position (KS) with the first means (T) in the open position.   A take-out device (40) for taking out the fiber fleece (V) formed on the first means (T) is provided in the first means (T). The apparatus of any one of Claims.   23. The device according to claim 22, wherein the take-out device (40) is arranged following the defining part (54a) of the cover (46, 54).   25. Apparatus according to claim 23 or 24, wherein the take-out device is a roller pair (40).   25. The device according to claim 23 or 24, wherein the take-out device (40) is followed by a device (41, 42) for forming a fiber bundle (FB).   Device according to claim 9, wherein the radial distance between the suction drum (T) and the cylinder (Z) has a value between 0.2 mm and 2 mm.

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