JP5995633B2 - Suction nozzle for each working part of textile machine that manufactures twill winding package - Google Patents

Description

  The present invention relates to a suction nozzle for each working part of a textile machine for manufacturing a traversing package, as described in the premise part of claim 1.

  With regard to the operation of textile machines that produce traversed packages, especially automatic traversing machines, for many years when rewinding is interrupted, for example during thread breaks, controlled cutting by clearers or changing transport packages, the working unit calculator Therefore, it is common to operate an automatic yarn coupling device unique to the working unit.

  As described in German Patent Application Publication No. 4005752, for example, the working unit computer is a first type of winding package that slowly rotates a suction opening of a so-called suction nozzle in a direction opposite to the winding direction. A negative pressure is applied to the surface. At this time, the suction nozzle attempts to receive the yarn end portion of the upper yarn from the surface of the winding package formed as a traverse winding package in an aerodynamic manner by the suction opening. After gripping the upper thread end, the suction nozzle pivots back to its starting position where the suction opening of the suction nozzle is positioned below the yarn splicing device. At that time, the yarn strand extending between the traverse package and the suction nozzle is connected to the electronic yarn clearer arranged above the yarn coupling device, to the yarn clamping device positioned in the region of the yarn coupling device, and to the yarn guide plate. And through the corresponding guide contours of the yarn guide bending member, into which the thread of the yarn cutting device located below the splicing device enters.

  At substantially the same time as the suction nozzle, the gripper tube positioned at the lower starting position pivots to the upper working part, and at that time, for example, the lower thread fed from the transport package held by, for example, a yarn tensioning device is swung to the upper working portion. Take me with you. When the gripper tube turns in the upper working part, the lower thread similarly guided by the corresponding thread guide contour moves to the attached open thread clamping device and also the open thread cutting device. The lower thread and the upper thread are then cut to a precise length, prepared in a so-called holding and defibrating tube, and joined together in a yarn twisting device. In short, the working section of the automatic traverse winding machine always needs not only the upper thread brought back from the traverse package but also the lower thread coming from the transport bobbin in order to continue operation automatically after the yarn breakage, for example. It is said.

  The above-described yarn binding devices and the accompanying suction nozzles and gripper tubes have been demonstrated and have been used extensively in the textile industry for some time.

  Of course, with known suction nozzles, problems may arise in some cases when receiving the yarn ends that wrap around the surface of the twill package. Such a problem is especially the case when the yarn ends that wind around the twill package are relatively strongly kneaded and / or when there are, for example, somewhat difficult, for example particularly multi-haired (fluffy, tangled) yarns. To occur.

  In order to assist the suction nozzle in receiving yarn ends that are somewhat difficult to handle, it has already been proposed to place a comb strip in the region of the suction opening of the suction nozzle. The sucked yarn is captured by the comb strip.

  Suction nozzles with such comb strips in the region of the suction opening are known, for example DE 102006039735, DE 102006020353 or EP 0398415. It is described in detail in the specification.

  For example, in German Offenlegungsschrift DE 102006039735, a suction nozzle is known, which has a particularly suitable suction characteristic, based on the particular configuration of the suction head. A preferred suction nozzle is additionally provided with a comb strip in the region of the suction opening, the comb strip being arranged on the cover element of the suction nozzle head and having teeth of the same length arranged side by side. Has a column.

  In German Offenlegungsschrift 102006020353, a special mouthpiece of a suction nozzle is described. This known mouthpiece is provided with a needle strip manufactured and bent by embossing in the area of the suction opening. The needle strip is a guide plate for the mouthpiece by means of hot melt adhesive tape using a so-called corner plate. It is fixed to. In German Offenlegungsschrift 102006020353 there is no detailed description of the precise formation of the needle strip.

  Similarly, in EP 0 398 415, suction nozzles are known, which suction nozzles are each provided with a comb strip in the region of the suction opening. Furthermore, EP-A-0398415 describes a process for the production of such comb strips. According to this known method, first, several base plates (the base plate itself already has a fixing hole) are separated by a laser cutting device at the center so that the cutting line has a comb-like course. . The plate piece resulting from the separation of the base plate is then provided with a number of teeth of the same size in the region of the cutting edge, and the plate piece is then formed into comb strips by a plurality of bending processes, And finally deburred to chemical formula.

  The comb strips known from EP-A-0 398 415 are not only relatively cumbersome to manufacture, but are in fact not completely satisfactory.

German Patent Application Publication No. 102006039735 German Patent Application Publication No. 102006020353 European Patent Publication No. 0398415

  Starting from the background art, the object of the present invention is to improve the suction nozzle with the comb strip, which can be produced economically on the one hand and on the other hand always ensuring the yarn end that wraps around the twill package. To provide something that can be received.

  In order to solve this problem, according to the present invention, there is provided a suction nozzle for each working part of a textile machine for manufacturing a traverse package, the surface of the traverse package after a thread break or controlled thread cut A suction opening for aerodynamically receiving a yarn end that winds around the suction end, wherein the suction opening comprises a comb strip that constrains the sucked yarn end, wherein the comb strip is manufactured by photochemical etching and has a different height. Teeth having a large height and teeth having a large height are alternately arranged with teeth having a small height.

  Preferably, the large teeth are arranged with a spacing of 0.5 mm to 1.0 mm from each other.

  Preferably, the height of the large teeth is 0.5 mm to 0.8 mm and the height of the small teeth is 0.2 mm to 0.4 mm.

  Preferably, the small teeth have an acute angle of 10 ° to 30 °.

  Preferably, the comb strip is made from spring steel having a thickness of 0.2 mm to 0.5 mm.

  According to the particular advantage of the manufacture and configuration of the suction nozzle comb strip with alternating large and small teeth according to the present invention, the surface of the winding package is based on the retracted arrangement of small teeth. The end of the wound upper thread is first gripped exclusively by the large teeth, lifted relatively softly, and then transferred to the small teeth through the sides of the large teeth. The relatively sharp small teeth grip the yarn end or the fiber protruding from the yarn end and immediately restrain the yarn. The yarn thus constrained is then unwound from the traverse package that rotates slowly in the unwinding direction without problems.

  According to a further advantage of the tooth arrangement and configuration according to the invention, in particular the retracted placement of the small teeth between each two large teeth, the small teeth are substantially protected from mechanical influences. As a result, small teeth can be formed very precisely. Furthermore, due to the tooth spacing between the larger teeth, which is larger than that of comb strips having identical teeth, such comb strips are less susceptible to dirt than conventional comb strips.

  Photochemical etching is recognized as a preferred method for producing comb strips according to the invention, in particular for producing fine tooth geometries.

  In this known method, a photochemical process is carried out with short-wave radiation, and in the photochemical process a very precise material separation occurs at the exposed location of the material.

  In a preferred configuration, the large teeth are arranged with a spacing of 0.5 mm to 1.0 mm, for example 0.7 mm, with respect to each other. Such spacing of the large teeth prevents, on the one hand, the comb strip from prematurely soiling, and on the other hand such spacing ensures that the yarn ends are received from the surface of the twill package.

  When the height of the large tooth is 0.5 mm to 0.8 mm, for example 0.7 mm, and the height of the small tooth is 0.2 mm to 0.4 mm, suitable conditions for the tooth height can be obtained. (Claim 3). In short, the best condition (ratio) is when the small tooth height is approximately half of the large tooth height and the large tooth spacing is approximately equal to that height, as will be appreciated in practice. Is given.

  According to a further preferred configuration, the acute angles of the small teeth are each 10 ° to 30 °, preferably about 20 °. With such thin and small teeth, particularly difficult yarns, which are often relatively fluffy, can be reliably gripped.

  According to a further preferred configuration, the comb strip is preferably made from spring steel having a thickness of 0.2 mm to 0.5 mm. Such proven spring steel, which is freely available on the market, is not only a proven inexpensive material, but also has a sufficiently high strength even with a small thickness.

  The structure of the suction nozzle comb strip according to the invention not only improves the working capacity of the suction nozzle when receiving the yarn end, but also the return of the suction nozzle by the comb strip according to the invention. When turning, for example, in some cases, slacks or loops seen in the received yarn are chopped off, ensuring that there is always a single fiber during the subsequent yarn joining process.

1 schematically shows one winding section of a textile machine, in the illustrated embodiment of an automatic traversing machine, having a suction nozzle with a comb strip according to the invention for producing a traversing package. 1 is a perspective view of a suction nozzle head of a suction nozzle with a comb strip according to the present invention. FIG. It is a figure which shows the suction nozzle provided with the comb strip by this invention from the front. FIG. 3 is a partially enlarged view of a dentition of a comb strip according to the present invention.

  Next, embodiments of the present invention will be described in detail using the illustrated embodiments.

  FIG. 1 is a schematic side view of a textile machine for manufacturing a traverse winding package, that is, a rewinding working section 2 of a so-called automatic traverse winding machine 1 in the illustrated embodiment.

  Such an automatic traversing machine 1 is normally provided with the working part 2 as the same many rewinding parts arrange | positioned along with the row. Although not known in detail, the spinning cup 3 produced by the ring spinning machine is rewound onto the large capacity traverse package 5 in the working unit 2. After completion, the traverse package 5 is delivered to a traverse package transporting device 7 extending over the machine length by a service assembly that performs automatic work (not shown), preferably a traverse package changer. It is transported to a package loading station or the like arranged on the end side.

  As shown in the illustrated embodiment, the automatic traversing machine 1 is often provided with a logistic device configured as a bobbin / pipe transport system 6, in which a spinning cup 3 or an empty pipe is provided. Circulates on the transport tray 11. Of the bobbin / tube bobbin transport system 6, FIG. 1 shows only a cup supply section 24, a reversibly drivable storage section 25, a lateral transport section 26 leading to the rewinding unit 2, and a pipe return guide section 27. Yes.

  Furthermore, each working part 2 of the automatic traversing machine 1 is equipped with various other devices which are necessary for regular operation of the working part 2, which are known and therefore not described in detail. Each working unit 2 includes, for example, a working unit computer 28, and the working unit computer 28 is connected to the central control unit 30 of the automatic traverse winding machine 1 through a bus connection unit 29, and each working unit 2. Is provided with a winding device 4, and the winding device 4 is provided with a package holding frame 8 that is movably supported around a turning shaft 12.

  As can be seen from FIG. 1, during winding operation, the traverse package 5 held in the package holding frame 8 so as to be freely rotatable is placed on the surface of the support / drive roller 9 for support / drive. An electric motor 33 acts on the roller 9. The electric motor 33 is connected to the working unit computer 28 via the control line 35.

  In order to traverse the wound yarn 16 during the winding process, a yarn traversing device 10 is provided, which comprises, for example, a yarn guide finger 13, and the yarn guide finger 13 is electrically driven. The motor-type driving device 14 acts to traverse the yarn 16 wound around the traverse package 5 between the end faces of the traverse package 5. The yarn guide driving device 14 is operatively connected to the working unit computer 28 via the control line 15.

  Furthermore, such a working part 2 comprises a yarn coupling device 42, preferably an aerodynamic twisting device 42, a gripper tube 43 for manipulating the bobbin thread, and the suction nozzle 17, and the suction nozzle 17, the yarn end portion wound around the surface of the traverse package 5 after interruption of winding is received and can be introduced into the yarn coupling device 42. The suction nozzle 17 is provided with a suction opening 23 in the part of the suction nozzle head 18, as can be seen from FIGS. 2 and 3, for example, and the suction opening 23 is provided with a comb strip 19 according to the invention.

  Below, the exact structure of the comb strip 19 according to the present invention will be described in detail with reference to FIGS.

  FIG. 3 is a front view of the suction head 18 of the suction nozzle 17. The suction head 18 is provided with a suction opening 23, and a comb strip 19 according to the present invention is positioned in a region above the suction opening 23. The comb strip 19 comprises several large teeth 20 and several small teeth 21. That is, one small tooth 21 is positioned between two large teeth 20 arranged at intervals.

  As shown in an enlarged view in FIG. 4, the large teeth 20 have a height H of 0.5 mm to 0.8 mm, preferably 0.7 mm, and a mutual distance a of 0.5 mm to 1.0 mm. Is arranged in. Each small tooth 21 arranged between two large teeth 20 has a height h of 0.2 mm to 0.4 mm and an angle α of 10 ° to 30 °, preferably 20 °. ing. In short, the tooth tip 31 of the small tooth 21 is retracted largely with respect to the tooth tip 22 of the large tooth 20 and is approximately half the height starting from the bottom of the tooth.

  The comb strip 19 according to the invention is preferably machined from a spring steel plate having a thickness t of 0.2 mm to 0.5 mm. Photochemical etching is recognized as a preferred production method for producing the comb strip according to the invention. Such a manufacturing method in which photochemical processes are carried out with short-wave radiation (very precise material peeling occurs in exposed areas of thin spring steel in the photochemical process) makes it possible to produce particularly fine tooth geometries at low cost. it can.

  DESCRIPTION OF SYMBOLS 1 Automatic traverse winding machine, 2 Working part, 3 Spinning cup, 4 Winding device, 5 Traverse winding package, 6 Bobbin / pipe transport system, 7 Traverse package transport device, 8 Package holding frame, 9 Support / drive roller, 10 Traverse device, 11 Conveying plate, 12 Rotating shaft, 13 Thread guide finger, 14 Drive device, 15 Control line, 16 Thread, 17 Suction nozzle, 18 Suction nozzle head, 19 Comb strip, 20 Large teeth, 21 Small teeth, 22 Tooth tip, 23 suction opening, 24 cup supply section, 25 storage section, 26 lateral transport section, 27 pipe return guide section, 28 working section computer, 29 bus connection section, 30 central control unit, 31 bent section, 32 structured Surface, 33 electric motor, 34 combs Lip region, 35 control lines 42 yarn binding apparatus 43 gripper tube

Claims (5)

A suction nozzle for each working part of a textile machine that manufactures a twill winding package,
A suction opening for aerodynamically receiving a yarn end that winds around the surface of the twill package after thread breakage or controlled yarn cutting, the suction opening comprising a comb strip that restrains the sucked yarn end In things,
Alternating comb strip (19) is provided with teeth (20, 21) having different heights, the teeth (20) having larger height (H) is provided with teeth (21) having a smaller height (h) A suction nozzle, characterized in that it is arranged in   Suction nozzle according to claim 1, wherein the large teeth (20) are arranged with a spacing (a) between 0.5 mm and 1.0 mm, respectively.   The height (H) of the large tooth (20) is 0.5 mm to 0.8 mm, and the height (h) of the small tooth (21) is 0.2 mm to 0.4 mm. Suction nozzle.   The suction nozzle according to claim 1, wherein the small teeth (21) have an acute angle (α) of 10 ° to 30 °.   Suction nozzle according to claim 1, wherein the comb strip (19) is made of spring steel having a thickness (t) of 0.2 mm to 0.5 mm.

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