JP2005325509A - Spinning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spinning machine that is equipped with a draft mechanism 13, to which a guide 25 for the fiber bundle 22 is connected in the guide division 15 and the sucking band area 33 is formed next to the inner face of the guide along the guide division in the radius direction in order to form the collecting and bundling areas 25, 26, 27 for aggregating the fiber bundle that is finally drafted but not yet be spun; in this spinning machine system, a fine spinning machine is provided by improving the conventional system that the compact fiber bundle 22 is guided and then continuously twisted into a new system that aerodynamic and mechanical fiber bundle is guaranteed with optimal combination in the no-draft bundle-collecting area, even when a traverse motion is used in front of the draft mechanism or not used. <P>SOLUTION: In the case where a traverse motion device 42 is employed in front of a multi-step draft mechanism, a deflecting screen 40 is arranged on the upper side of the sucking zone 33. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a spinning machine, in particular a ring spinning machine, of the type described in the superordinate concept of claim 1.

  In the case of a known ring spinning method or in the case of a known ring spinning machine of the above type (German Patent Publication No. 3927936; textil praxis international 1993, September, pages 684-686), single or parallel Two roving yarns are guided to one half of each of the ring spinning draft mechanisms, in which case the roving yarns are drafted at normal draft values and then perforated without further drafting. Supplied to an aerodynamic fiber compression mechanism on the suction roller.

  That is, in the known method, the aerodynamic compact compression of the fiber bundle is performed on the surface of the perforation / suction roller or suction drum, and in this case, an advantageous effect is obtained by separating the fiber focusing process and the drafting process. Affected. Because of the compression, the already drafted fiber bundle held on the surface of the suction drum by the suction air flow is displaced in the drum axial direction, so that the fibers are oriented parallel and drafted in the fiber bundle and in the transverse direction. The movement causes the individual fibers to accumulate and converge with each other.

  In general, the blown air impingement on the surface supports the process created by the suction action, so that the loose fibers are stable between the acting air streams during transport towards the tightening line for the twisting process. Held in a balanced state.

  The invention is particularly advantageously also applicable to the ring spinning method and ring spinning machine according to West German patent application No. 4426249.3, filed simultaneously under the title “Ring spinning machine and ring spinning machine”. Instead of blowing air flow, suitable air guiding means are used. Therefore, the contents of this specification also refer to the contents of the present invention.

  The fiber aerodynamic compression following the high draft results in a compact fiber bundle with a width of approximately 1 mm or less, which simultaneously forms the base of the spinning triangle following the untwisting gap. . This necessarily reduces the height of the spinning triangle. Therefore, the twisting of the fiber bundle can be influenced based on the aerodynamic focusing of the fibers.

  Normally, a three-cylinder draft mechanism is used in a ring spinning machine. In this case, the central cylinder pair provided at the beginning of the high draft area is generally provided with a double apron, and this apron is an inflow gap of the delivery roller pair. Has reached near.

  The three-cylinder draft mechanism to which the roving is supplied performs a draft of 25 to 50 times according to the yarn fineness. In this case, the high draft corresponds to a fine yarn count. Mechanical condensers have already been used to converge the fiber bundles between the end of the apron in the main draft area and the clamping gap between the delivery rollers of the draft mechanism (German Patent Publication No. 4132919 and No. 1). No. 4141237).

  However, the resulting yarn quality improvement is limited. This is because the irregularity of the yarn is caused by friction of individual fibers in the guide member of the condenser. For this reason, the condenser provided at the end of the main draft area does not constitute the best means for dramatically improving yarn quality.

  In order to reduce wear in the compound / draft mechanism, a traversing device is generally provided in front of the compound / draft mechanism, and this traversing device has a fiber bundle entering the compound / draft mechanism for about one minute. It can be traversed over a width of approximately 6 mm to 10 mm in a time period. In this case, however, there is a problem with the use of a suction zone formed as a tilted slit, which focuses the fiber bundle aerodynamically and mechanically at the front tilted slit edge as viewed in the transport direction. It has the basic advantage.

The action of the inclined slit is temporarily changed by the traverse motion. This is because the fiber bundle moves along the leading edge for a relatively long time.
German Patent Publication No. 3927936 West German Patent Application No. 4426249.3 German Patent Publication No. 4132919 German Patent Publication No. 4141237 textil praxis international 1993, September, pages 684-686

  It is an object of the present invention to achieve the best combined aerodynamic and mechanical in a focusing zone where no drafting is performed, whether using a traversing device in front of a double-draft mechanism or not using a traversing device. The aim is to improve a ring spinning machine of the type mentioned at the beginning so that fiber bundle focusing is ensured.

    According to the present invention, the above problem has been solved by the configuration of the present invention described in the characterizing portion of claim 1.

  Further advantageous configurations are set forth in the other claims.

  The idea of the present invention is that the suction band, which has an advantageously linear restricting portion extending in the axial direction at the rear end when viewed in the rotation direction of the sucking roller, is slightly longer than the traversing motion length within this restricting portion. It has a large extension and is formed so as to be substantially symmetrically tapered in the fiber bundle / conveying direction. In this way, the fiber bundle alternately contacts the left or right suction band limiting portion extending obliquely in the opposite direction during the traverse motion, so that the best set of fiber bundles is achieved despite the traverse motion. Compact fiber bundles can be formed by combined aerodynamic and mechanical focusing.

  Unlike inclined slits with edges that extend parallel to each other, which significantly changes the fiber guide conditions when traversing motion is superimposed, such fiber guide condition variations are particularly symmetric with the triangles of the suction zone according to the invention. Reduced by typical configuration.

  The elongate taper provided at the end of the suction zone located in the conveying direction is particularly important for particularly best focusing of the fiber bundle.

  The arrangement according to the invention of at least approximately a triangle in the suction zone significantly reduces the total area of the suction zone, in which case the triangle is significantly shortened in the conveying direction and the second half is circumferential in the circumferential direction of the suction zone. It is formed only as an elongated slit piece extending in the direction.

  Next, the present invention will be described with respect to the embodiments of the present invention shown in the drawings.

  According to FIGS. 1 and 2, the front draft area 23 and the main draft area 24 having the drawing roller pairs 37, 37 ′ from the coarse yarn bobbin 12 arranged at the upper portion through the deflection member 28 are provided to the coarse yarn 11. It is supplied into the provided three cylinder draft mechanism 13. A pair of rollers 29, 29 'located at the end of the front draft zone 23 and at the beginning of the main draft zone 24 comprises an apron 30, 30' schematically illustrated in a known manner. , 26 has been reached.

  The lower roller of the delivery roller pair 25, 26 is configured as a perforation and suction roller 25 with a rotational axis 36 having a significantly larger diameter than the other rollers, which suction roller corresponds to the draft mechanism. In cooperation with the delivery roller 26, the final clamping gap 14 of the draft mechanism 13 is formed.

  The fiber bundle moving through the draft mechanism 13 is guided to the corresponding untwisting roller 27 through a part of the peripheral surface of the suction roller along the guide section 15 bent after the clamping gap 14, This untwisting roller cooperates with the suction roller 25 to form an untwisting gap 16 for the fiber bundle.

  According to FIG. 2, the perforation 35 of the suction roller 25 extends over the entire circumferential direction, but extends only over a small width of the peripheral wall of the suction roller 25, and this width is the case of the fiber bundle 22. In consideration of the traversing motion performed by the above, the fiber bundle 22 is designed in such a size that it always contacts the perforation 35.

  Inside the suction roller 25, a concentric screen 32 interrupted in the range of the guide section 15 is arranged as follows, that is, based on the negative pressure maintained in the inner chamber of the screen 35, the suction roller 25. The screen 32 is arranged so that an air flow is generated in the direction of the arrow 34 through the perforation 35 in the radial direction from the outside to the inside.

  Following the untwisting gap 16, the fiber bundle is twisted to reach a general ring spinning machine 17 with ring rail 18, ring 19, traveler 20, spindle rail 38 and spindle 21 and untwisted. A ring spinning yarn 39 is manufactured from the compact fiber bundle 22 delivered from the gap 16.

  In the draft mechanism 13, the draft is advantageously performed 80 to 100 times as a whole. In this case, the draft is performed only within the normal limit range of 1.1 to 1.3 times in the front draft area 23. Is called.

  According to FIGS. 1, 2 and 3, the suction zone 33 provided in the screen 32 as a notch is not only limited to the length of the guide section 15 in the circumferential direction, but also the perforation range in the width direction. It is limited to the width d which is the same size as the width of.

  As is apparent from FIGS. 1 to 3, according to the present invention, the deflection screen 40 is provided on the outer side in the radial direction of the suction roller 25 and on the upper side of the suction zone 33. 27 extends beyond the width d of the suction zone 33 on both sides in the axial direction over the guide section 15 between 27. The distance A between the outer surface of the suction roller 25 and the deflection screen 40 is substantially the same as the width d of the suction zone 33.

  On the basis of the fact that the deflection screen 40 extends laterally beyond the suction zone 33, the air stream 34 sucked from the outside is forced from both sides almost in the center of the suction zone 33 in the axial direction. The air flow 34 impinges on the fiber bundle 22 from all sides and substantially axially from both sides. This causes the fiber bundle to be significantly compressed in the axial direction, so that the fibers are very effectively focused to form a compact fiber bundle 22 with a width significantly less than 1 mm.

  That is, following the high draft carried out in the main draft zone 24, the suction roller 25 and the roller 26 without drafting in the converging zone (guide section 15) and without applying a blowing air flow. 27, the fiber bundles are converging between the clamping gaps 14, 16, which results in a significantly higher yarn quality behind the untwisting gap 16. In other words, the focusing according to the present invention not only prevents the fiber bundle expansion action in the main draft area, but also overcompensates this action to dramatically improve the yarn quality.

  In the embodiment according to FIG. 4, the deflection screen 40 ′ which is likewise arranged concentrically with respect to the suction roller 25 has an opening 42 on only one side, through which the air flow 34 is substantially axial. It can flow toward the suction zone 33. On the other side, the deflection screen 40 ′ is provided with a wall 31 projecting inward in the radial direction, which wall is substantially flush with the lateral restriction of the suction zone 33 located on this deflection screen side. Yes.

  Based on this configuration, the air stream 34 acting on the fiber bundle 22 in a substantially axial direction and partially in the radial direction presses the fiber bundle against the wall 31 and the perforation 35 at the same time. Are compressed into a narrow bundle of compact fibers having a width of 1 mm or less.

  As shown in FIGS. 1 to 4, since a large number of spinning sections are usually arranged in the ring spinning machine, the deflection screen 40 ′ extends from the opening 42 to the adjacent suction zone, where Are provided with mirror-symmetric walls with respect to the wall 31 in alignment with the opposing edges of the suction zone. In this case, a sufficiently large opening for allowing air to flow in from the outside must be provided at the end of the deflection screen 40 'when viewed in the circumferential direction or in the deflection screen 40' itself.

  The main idea of the embodiment according to FIGS. 3 and 4 is that a partial annular gap 41 is provided between the deflection screens 40, 40 ′ and the outer surface of the suction roller 25 around the suction roller 25 in the range of the suction zone 33 or the guide section 15. In this partial annular gap, air can flow almost axially only from one side or from both sides.

  As described above, a normal ring spinning machine is provided with 400 to 500 spinning units side by side. In general, one drawing arm is assigned to four adjacent draft areas. Further, since the suction roller 25 is assigned to the drawing arm, the suction roller 25 actually has four perforation ranges juxtaposed at intervals, which are respectively shown in FIG. 3 or FIG. 4 with deflection screens 40, 40 '.

  FIGS. 5 to 7 show cross-sectional views taken along FIGS. 1III-III of various embodiments of the suction zone 33 according to the present invention. Symbol F indicates the fiber bundle / conveying direction.

  According to FIG. 5, the suction zone 33 has the shape of an acute isosceles triangle having a symmetry axis 43, in which case the symmetry axis 43 extends in the circumferential direction of the suction roller 25 and the suction zones 33 are mirrored to each other. It is divided into two symmetrical equal halves.

  The restriction in front of the suction zone 33 forms a straight base 33 ′ extending perpendicularly to the symmetry axis 43 or parallel to the schematically shown rotation axis 36 of the suction roller 25. In FIG. 5, the fiber bundle entering the suction zone 33 from above through the bottom 33 ', for example, traverses within a range B that is slightly shorter than the bottom 33' as a whole and located completely within the bottom.

  As a result, the fiber bundle alternately reaches the right restricting portion 33 ″ and the left restricting portion 33 ″ ′ of the suction roller 25 (as viewed in the transport direction) when transported through the suction zone 33 on the suction roller 25. When the fiber guide conditions are almost unchanged, a combined aerodynamic and mechanical focusing of the fiber bundles takes place. The restricting portion 33 ″ and the restricting portion 33 ″ ′ of the suction roller 25 extend obliquely opposite to the apex 33 ″ ″ of the triangular suction band 33.

  The length of the suction zone 33 from the bottom 33 'in the axial direction to the apex 33 "" when viewed in the circumferential direction is 25 mm to 40 mm.

  In the embodiment of FIG. 6 using the same reference numerals as in FIG. 5, the suction zone 33 is first formed in a triangle. However, since the lateral restriction 33 "and restriction 33" 'extend at a steep angle with respect to the symmetry axis 43, the height of the triangle is significantly shorter than the height of the triangle in FIG. According to FIG. 6, a straight slitted piece 45 extending in the conveying direction F having a width of 1 mm to 2 mm is connected to the apex 33 "" of the triangle in the circumferential direction.

  In this way, the aerodynamic and mechanical focusing action combined in the lateral restricting part 33 ″ and the restricting part 33 ″ ″ by the traversing stroke B of the fiber bundle is likewise obtained within the converging zone. This focusing is maintained within the linear slitted piece 45 and subsequently transported when transporting the already compacted compact fiber bundle 22.

  In the embodiment of the suction zone 33 in FIG. 7, a concave side restricting portion 44, which is mirror-symmetrical with respect to the symmetry axis 45, is provided following the linear axial base 33 ′ of the suction zone 33. This restricting portion has shifted to a linear slitted piece 45 having a width of 1 mm to 2 mm when viewed in the transport direction.

  According to FIG. 8, a hole row 35 of the suction roller 25, preferably having a hole diameter of 8 mm, is located symmetrically above the linear slit piece 45 having a width of approximately 1 mm to 2 mm.

  The concave side limits 44 that taper to each other also provide the best combined aerodynamic and mechanical focusing of the fiber bundles reciprocating within the traverse stroke B. This fiber bundle enters into a narrow linear slit piece 45 extending in the circumferential direction based on the action of the suction air flow after being compacted, whereby focusing is maintained and further improved.

  The advantage of the embodiment according to FIG. 7 with a concave side restriction 44 is that the total area of the suction zone 33 which is important for the total intake air quantity without impairing the focusing action in the case of fine fiber guide conditions. Is further reduced compared to the other two embodiments.

1 is a schematic side view of a single spinning section of a ring spinning machine according to the present invention. The front view of FIG. The expanded sectional view which followed the air guide means of 1st Example, and followed the FIG. 1III-III line. FIG. 3 is an enlarged cross-sectional view along the line of FIG. 1III-III having another example air guiding means. 1 is a schematic plan view of a suction zone according to the present invention in a first embodiment when viewed in the radial direction. FIG. FIG. 6 is another embodiment of the suction zone according to the present invention. The figure which showed the structure of the suction zone by this invention especially advantageous for reducing required amount of intake air. FIG. 8 is a cross-sectional view similar to FIG. 3, showing the range of the linear slit piece of FIG. 6 or 7.

Explanation of symbols

  11 roving, 12 roving bobbin, 13 draft mechanism, 14 clamping gap, 15 guide section, 16 untwisting gap, 17 ring spinning machine, 18 ring rail, 19 ring, 20 traveler, 21 spindle, 22 fiber bundle, 23 Front draft zone, 24 main draft zone, 25 suction roller, 26, 27 roller, 32, 40, 40 'screen, 33 suction zone, 34 air flow, 35 perforation

Claims (24)

A spinning machine,
A multistage / draft mechanism (13) is provided, and a guide (25) for the fiber bundle (22) is connected to the multistage / draft mechanism (13) over the guide section (15),
Forming a converging zone (25, 26, 27) in which the final drafted untwisted fiber bundle is agglomerated or converged into a compact fiber bundle (22) with a width of especially 1.5 mm or less, preferably 1 mm or less In order to do so, a suction zone (33) is formed along the guide section (15) and radially adjacent to the inner surface of the guide (25),
A spinning machine (17) is provided, and the spinning machine (17) gives a predetermined twist to the compact fiber bundle (22) that is fed from the untwisting gap (16) following the guide (25). In the form of
A spinning machine characterized in that when the traversing device (42) is used before the multistage / draft mechanism (13), a deflection screen (40) is provided above the suction zone (33).   The spinning machine according to claim 1, wherein the guide (25) is a suction roller.   A deflection screen (40) extends substantially over the guide section (15) between the rollers (26, 27), one roller (26) being the delivery roller and the other roller (27) being the solution. The spinning machine according to claim 1 or 2, wherein the spinning machine is a twist roller.   4. Spinning machine according to any one of claims 1 to 3, wherein the deflection screen (40) extends in the axial direction on both sides beyond the width of the suction zone (33).   The distance (A) between the outer surface of the guide (25) and the deflection screen (40) is approximately the same size as the width (d) of the suction zone (33). The spinning machine described in the item.   The deflecting screen (40) extends in the lateral direction far beyond the suction zone (33), and the air flow (34) sucked from the outside is forcibly forced from both sides almost in the suction zone (33). The spinning machine according to any one of claims 1 to 5, wherein the spinning machine is adapted to flow toward a fiber bundle (22) occupying substantially the center of the fiber.   A deflection screen (40 ') arranged concentrically with the guide (25) is provided with an opening (42) on one side, through which the air flow (34) is substantially axial. The spinning machine according to any one of claims 1 to 6, wherein the spinning machine is adapted to flow toward the suction zone (33).   On the other side, the deflection screen (40 ′) comprises a wall (31) projecting radially inward, the suction zone (33) being located on the deflection screen (40 ′) side. The spinning machine according to any one of claims 1 to 7, wherein the spinning machine is substantially flush with the side restriction portion.   A deflection screen (40 ') extends from the opening (42) to an adjacent suction zone, where the wall is mirror-symmetrical with respect to the wall (31) in alignment with the opposite edge of the suction zone The spinning machine according to any one of claims 1 to 8, wherein a spinning machine is provided.   The spinning machine according to any one of claims 1 to 9, wherein an opening for allowing air to flow in from the outside is provided at an end of the deflection screen (40 ').   The perforation (35) of the guide (25) extends over the entire circumferential direction only over a small width of the peripheral wall of the guide (25), and the width of the peripheral wall causes the traversing motion of the fiber bundle (22). 11. The spinning machine according to claim 1, wherein the fiber bundle (22) is designed with such a size that the fiber bundle (22) is always in contact with the perforation (35).   2. A row of holes of a guide (25) with a hole diameter of 0.8 mm symmetrically advantageously located above a linear slit piece (45) with a width of 1 mm to 2 mm. The spinning machine according to any one of 11 to 11.   The spinning machine according to any one of the preceding claims, wherein the suction zone (33) has an axis of symmetry (43) extending in the circumferential direction of the guide (25).   14. A spinning machine according to any one of claims 1 to 13, wherein the suction zone (33) has a particularly acute triangular shape.   The suction zone (33) has the shape of a triangle or hopper with walls (44) that extend in a tapered manner, in particular symmetrically with each other, and with elongated slits (45) that follow in the fiber bundle and transport direction. 15. Spinning according to any one of claims 1 to 14, wherein the slitted piece (45) is advantageously linearly formed and extends in the circumferential direction of the guide (25). machine.   The spinning machine according to any one of claims 1 to 15, wherein the overall length of the suction zone (33) when viewed in the circumferential direction is 25 mm to 40 mm.   17. A spinning machine according to any one of claims 12 to 16, wherein the length of the piece with slit (45) that is linear in the circumferential direction is approximately half the length of the total suction zone.   The spinning machine according to any one of claims 12 to 17, wherein the width of the straight slit piece (45) is 1 mm to 2 mm.   The spinning machine according to any one of claims 1 to 18, wherein the guide (25) constitutes a feed roller of a draft mechanism (13).   The guide (25) is in contact with the corresponding delivery roller (26) of the draft mechanism and the corresponding untwisting roller (27) arranged angularly offset about the guide section (15); The spinning machine according to any one of claims 1 to 19.   21. A spinning machine according to any one of the preceding claims, wherein an untwisting gap (16) is formed between the guide (25) and the corresponding untwisting roller (27).   Following the untwisting gap (16), a ring spinning machine (17) comprising a ring rail (18), a ring (19), a traveler (20), a spindle rail (38) and a spindle (21) is arranged. A ring spinning yarn (39) is produced from a compact fiber bundle (22) delivered from an untwisting gap (16), according to any one of claims 1 to 21. Spinning machine.   The spinning machine according to any one of claims 1 to 22, wherein the suction zone (33) has at least one restricting portion that is inclined with respect to the circumferential direction of the guide (25). A method for operating a spinning machine according to any one of claims 1 to 23,
A multi-stage / draft mechanism (13) is provided, and a guide (25) for the fiber bundle (22) is connected to the multi-stage / draft mechanism (13) across the guide section (15), and the final draft is already twisted. Along the guide section (15) in order to form a converging zone (25, 26, 27) for agglomerating or converging unseen fiber bundles into compact fiber bundles with a width of especially 1.5 mm or less, preferably 1 mm or less And a suction zone (33) is formed adjacent to the inner surface of the guide (25) in the radial direction, and a spinning machine (17) is provided. The spinning machine (17) follows the guide (25) and is untwisted. In a method of giving a predetermined twist to the compact fiber bundle (22) delivered from the stop gap (16),
When the traversing device (42) is used in front of the multistage / draft mechanism (13), the deflection screen (40) is arranged outside the guide (25) to force the air flow (34) sucked from the outside. In the axial direction toward the fiber bundle (22), the air stream (34) impinges on the fiber bundle (22), and the fiber bundle (22) is significantly compressed in the axial direction. How to drive a spinning machine.

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