JP5549551B2 - Spinning method using pneumatic spinning device and pneumatic spinning device - Google Patents

Description

  The present invention relates to a spinning method using an air spinning device and a technique of the air spinning device.

  2. Description of the Related Art Conventionally, an air spinning apparatus that manufactures spun yarn by twisting a fiber bundle using a swirling airflow is known. The pneumatic spinning device generates a swirling airflow by supplying air to the spinning chamber, and manufactures spun yarn by swirling each fiber constituting the fiber bundle (for example, Patent Document 1 and Patent Document 2).

  However, the air spinning device has a problem in that it is easily affected by fiber characteristics because the fiber is swirled using a swirling airflow. That is, the pneumatic spinning device has a problem that the strength of twisting of the produced spun yarn varies depending on the fiber characteristics such as the average fiber length of the fiber bundle.

  Therefore, there has been a demand for establishment of a spinning method using an air spinning device that enables spinning according to fiber characteristics, and an air spinning device that enables spinning according to fiber characteristics.

JP 2003-193337 A JP-A-6-41822

  An object of the present invention is to provide a spinning method using an air spinning device that enables spinning according to fiber characteristics and an air spinning device that enables spinning according to fiber characteristics.

  Next, means for solving this problem will be described.

  The first invention relates to a spinning method using an air spinning device. The pneumatic spinning device includes a fiber guide in which a fiber introduction path is formed and a spindle in which a fiber passage path is formed. When a fiber bundle having an average fiber length of 32 mm or more is used as a raw material, an air spinning device having a distance between the spindle and the fiber guide of 2.6 mm or more and 4.1 mm or less is used.

  The second invention relates to a spinning method using the pneumatic spinning device according to the first invention. When a fiber bundle having an average fiber length of 32 mm or more is used as a raw material, an air spinning device having a distance between the spindle and the fiber guide of 3.1 mm to 3.6 mm is used.

  The third invention relates to a spinning method using the pneumatic spinning device according to the first or second invention. A fiber bundle having an average fiber length of 32 mm or more used as a raw material in the pneumatic spinning device includes a fiber bundle of natural fibers, a fiber bundle of synthetic fibers, and a synthetic fiber having an average fiber length of 32 mm or more and 51 mm or less. It is a fiber bundle containing.

  The fourth invention relates to a spinning method using an air spinning device. The pneumatic spinning device includes a fiber guide in which a fiber introduction path is formed and a spindle in which a fiber passage path is formed. When a fiber bundle having an average fiber length of less than 32 mm is used as a raw material, an air spinning device having a distance between the spindle and the fiber guide of 1.6 mm or more and less than 2.6 mm is used.

  The fifth invention relates to a spinning method using the pneumatic spinning device according to the fourth invention. When a fiber bundle having an average fiber length of less than 32 mm is used as a raw material, an air spinning device in which the distance between the spindle and the fiber guide is 1.8 mm or more and 2.3 mm or less is used.

  The sixth invention relates to an air spinning device for producing spun yarn using a fiber bundle having an average fiber length of 32 mm or more as a raw material. The pneumatic spinning device includes a fiber guide in which a fiber introduction path is formed and a spindle in which a fiber passage path is formed. The distance between the spindle and the fiber guide is 2.6 mm or greater and 4.1 mm or less.

  The seventh invention relates to an air spinning device according to the sixth invention. The distance between the spindle and the fiber guide is 3.1 mm or greater and 3.6 mm or less.

  The eighth invention relates to an air spinning device according to the sixth or seventh invention. The pneumatic spinning device uses, as a raw material, a fiber bundle of natural fibers having an average fiber length of 32 mm or more and 51 mm or less, a fiber bundle of synthetic fibers, and a fiber bundle partially including the synthetic fibers.

  The ninth invention relates to an air spinning device for producing spun yarn using a fiber bundle having an average fiber length of less than 32 mm as a raw material. The pneumatic spinning device includes a fiber guide in which a fiber introduction path is formed and a spindle in which a fiber passage path is formed. The distance between the spindle and the fiber guide is 1.6 mm or more and less than 2.6 mm.

  A tenth invention relates to an air spinning device according to the ninth invention. The distance between the spindle and the fiber guide is 1.8 mm or more and 2.3 mm or less.

  An eleventh invention relates to an air spinning device according to any of the sixth to tenth inventions. The pneumatic spinning device includes an input screen for inputting the type of fiber bundle used as a raw material.

  As effects of the present invention, the following effects can be obtained.

  According to the first invention, by using an air spinning device in which the distance between the spindle and the fiber guide is 2.6 mm or more and 4.1 mm or less, a spun yarn manufactured from a fiber bundle having an average fiber length of 32 mm or more is used. It becomes possible to stabilize the quality.

  According to the second invention, by using an air spinning device in which the distance between the spindle and the fiber guide is 3.1 mm or more and 3.6 mm or less, a spun yarn manufactured from a fiber bundle having an average fiber length of 32 mm or more is used. Quality can be improved.

  According to the third invention, it is possible to produce spun yarn from a plurality of types of fiber bundles having an average fiber length of 32 mm or more and 51 mm or less.

  According to the fourth invention, by using an air spinning device in which the distance between the spindle and the fiber guide is 1.6 mm or more and less than 2.6 mm, the spun yarn produced from the fiber bundle having an average fiber length of less than 32 mm It becomes possible to stabilize the quality.

  According to the fifth aspect of the present invention, a spun yarn produced from a fiber bundle having an average fiber length of less than 32 mm by using an air spinning device having a distance between the spindle and the fiber guide of 1.8 mm or more and 2.3 mm or less. Quality can be improved.

  According to the sixth invention, the quality of the spun yarn manufactured from the fiber bundle having an average fiber length of 32 mm or more is stabilized by setting the distance between the spindle and the fiber guide to 2.6 mm or more and 4.1 mm or less. It becomes possible.

  According to the seventh aspect, the quality of the spun yarn manufactured from the fiber bundle having an average fiber length of 32 mm or more is improved by setting the distance between the spindle and the fiber guide to 3.1 mm or more and 3.6 mm or less. It becomes possible.

  According to the eighth aspect, it becomes possible to produce spun yarn from a plurality of types of fiber bundles having an average fiber length of 32 mm or more and 51 mm or less.

  According to the ninth aspect of the invention, the quality of the spun yarn manufactured from the fiber bundle having an average fiber length of less than 32 mm is stabilized by setting the distance between the spindle and the fiber guide to 1.6 mm or more and less than 2.6 mm. It becomes possible.

  According to the tenth invention, the quality of the spun yarn manufactured from the fiber bundle having an average fiber length of less than 32 mm is improved by setting the distance between the spindle and the fiber guide to 1.8 mm or more and 2.3 mm or less. It becomes possible.

  According to the eleventh aspect of the present invention, it is possible to select an air spinning device according to the fiber characteristics without making a mistake, and it is possible to prevent confusion when changing a fiber bundle used as a raw material to a fiber bundle having different fiber characteristics.

The figure which shows the whole structure of the spinning unit. The figure which shows the draft apparatus 5 provided in the spinning unit 1. FIG. The figure which shows the pneumatic spinning apparatus 6 provided in the spinning unit 1. FIG. The figure which shows the pneumatic spinning apparatus 6 which is not provided with the needle 61n. The figure which shows the yarn fault detection apparatus 7 provided in the spinning unit 1. FIG. The figure which shows the tension stabilizer 8 provided in the spinning unit 1. FIG. The figure which shows the influence which the space | interval D of the spindle 62 and the fiber guide 61 has on rolling strength RP. The figure which shows the influence which the space | interval D of the spindle 62 and the fiber guide 61 has on rolling strength RP. The figure which shows the display of the pneumatic spinning apparatus 6 suitable for the kind of fiber bundle F. FIG.

  First, the overall configuration of the spinning unit 1 will be described with reference to FIG.

  The spinning unit 1 is a spinning machine that produces a package P by producing a spun yarn Y from a fiber bundle (hereinafter referred to as “sliver”) F. The spinning unit 1 includes a sliver supply unit 4, a draft device 5, an air spinning device 6, a yarn defect detecting device 7, and tension stabilization, arranged in the following order along the feeding direction of the sliver F and the spun yarn Y. It comprises a device 8 and a winding device 9.

  The sliver supply unit 4 supplies sliver F, which is a raw material of the spun yarn Y, to the draft device 5. The sliver supply unit 4 mainly includes a sliver case 41 and a sliver guide 42 (see FIG. 2). The sliver F stored in the sliver case 41 is guided by the sliver guide 42 and supplied to the draft device 5.

  The draft device 5 drafts the sliver F to make the thickness of the sliver F uniform. As shown in FIG. 2, the draft device 5 mainly includes four pairs of a back roller pair 51, a third roller pair 52, a middle roller pair 53, and a front roller pair 54 along the feeding direction of the sliver F. It consists of a pair of draft rollers. In addition, the arrow shown in the figure has shown the feed direction of the sliver F.

  The four pairs of draft rollers 51, 52, 53, and 54 are respectively composed of bottom rollers 51A, 52A, 53A, and 54A, and top rollers 51B, 52B, 53B, and 54B. Further, apron bands 53C and 53C made of leather or synthetic rubber are wound around the bottom roller 53A and the top roller 53B constituting the middle roller pair 53.

  The bottom rollers 51A, 52A, 53A, and 54A are rotated in the same direction by a driving device (not shown). The top rollers 51B, 52B, 53B, and 54B are driven by the rotation of the bottom rollers 51A, 52A, 53A, and 54A, and are rotated in the same direction. Further, each of the draft roller pairs 51, 52, 53, and 54 is set so that the rotation speed is sequentially increased along the feeding direction of the sliver F.

  With such a configuration, the sliver F sandwiched between the draft roller pairs 51, 52, 53, and 54 increases in feeding speed each time it passes through each of the draft roller pairs 51, 52, 53, and 54, and the adjacent drafts. It will be drafted between the roller pair. In this manner, the draft device 5 can make the thickness of the sliver F uniform by drafting the sliver F.

  The pneumatic spinning device 6 produces the spun yarn Y by twisting the drafted sliver F. As shown in FIG. 3, the pneumatic spinning device 6 mainly includes a fiber guide 61, a spindle 62, and a nozzle block 63. In addition, black arrows in the figure indicate the feeding direction of the sliver F and the spun yarn Y. White arrows shown in the figure indicate the flow direction of the supplied air.

  The fiber guide 61 is a member constituting a part of the spinning chamber SC. The fiber guide 61 guides the sliver F drafted by the draft device 5 to the spinning chamber SC. More specifically, the fiber guide 61 guides the sliver F to the spinning chamber SC through a fiber introduction path 61g communicated with the spinning chamber SC. Further, the fiber guide 61 is provided with a needle 61n for guiding the sliver F along the sliver F so as to protrude from the spinning chamber SC.

  The spindle 62 is a member constituting a part of the spinning chamber SC. The spun yarn Y twisted in the spinning chamber SC is sent to the downstream side in the yarn traveling direction of the pneumatic spinning device 6 through the fiber passage 62s of the spindle 62 communicated with the spinning chamber SC.

  The nozzle block 63 is a member constituting a part of the spinning chamber SC. The nozzle block 63 has a plurality of air holes 63a communicating with the spinning chamber SC. The air pressure-fed from a pneumatic feeder (not shown) is supplied to the spinning chamber SC through the air hole 63a. The air holes 63a provided in the nozzle block 63 are communicated so that the air ejected from the air holes 63a flows in the same direction around the central axis of the spinning chamber SC. Thereby, the air spinning device 6 can generate a swirling airflow in the spinning chamber SC (see white arrows in the figure).

  Here, the spinning chamber SC will be described in more detail. The spinning chamber SC is a space surrounded by the fiber guide 61, the spindle 62, and the nozzle block 63. Specifically, the spinning chamber SC has a substantially conical spindle 62 inserted from one side with respect to a substantially conical through hole 63p provided in the nozzle block 63, and a fiber guide 61 attached to the other side. It is a space surrounded by. The shape of the through hole 63p is not limited to the substantially conical shape as illustrated in FIG. 3, and may be a substantially cylindrical shape. That is, it is only necessary that the swirl airflow can be generated well in the spinning chamber SC, and the shape of the through hole 63p is not limited to a specific shape.

  The spinning chamber SC is divided into a space SC1 formed between the fiber guide 61 and the spindle 62, and a space SC2 formed between the spindle 62 and the nozzle block 63. In the space SC1, the rear end portion of each fiber constituting the sliver F is inverted (refer to a two-dot chain line) by the swirling airflow. Further, in the space SC2, the inverted rear end portion of each fiber constituting the sliver F is swirled (refer to a two-dot chain line) by the swirling airflow.

  With such a configuration, the rear end portion of each fiber constituting the sliver F guided to the fiber passage 62s along the needle 61n is inverted and swirled in the spinning chamber SC. As a result, the fibers that are swirling in an inverted manner are wound around the fibers in the center one after another. In this manner, the pneumatic spinning device 6 can twist the sliver F using the swirling airflow, and produces the spun yarn Y.

  As shown in FIG. 4, even if the pneumatic spinning device 6 has a configuration in which the needle 61n is not provided in the fiber guide 61, there is no difference in the purpose and effect of the present invention, and the technical scope of the present invention is not different. Belongs. In this case, the pneumatic spinning device 6 collects the sliver F at the downstream end portion of the fiber guide 61 and guides the sliver F to the fiber passage 62 s of the spindle 62.

  The yarn defect detection device 7 detects a defect portion generated in the spun yarn Y. As shown in FIG. 5, the yarn defect detection device 7 mainly includes a light source unit 71, a light receiving unit 72, and a casing 73. In addition, the arrow shown in the figure has shown the direction of the light irradiated from the light source part 71. FIG.

  The light source unit 71 is a semiconductor element that emits light by applying a voltage in the forward direction, that is, a light emitting diode. The light source unit 71 is arranged so that the spun yarn Y can be irradiated with light from the light source unit 71.

  The light receiving unit 72 is a semiconductor element that can control a current by an optical signal, that is, a phototransistor. The light receiving unit 72 is disposed so as to receive light emitted from the light source unit 71.

  The casing 73 is a member that holds the light source unit 71 and the light receiving unit 72 at predetermined positions. The casing 73 is provided with a yarn passage 73a through which the spun yarn Y passes. The casing 73 holds the light source unit 71 and the light receiving unit 72 so as to face each other with the spun yarn Y interposed therebetween.

  With such a configuration, the amount of light received by the light receiving unit 72 is a value excluding the amount of light shielded by the spun yarn Y from the light emitted from the light source unit 71 to the spun yarn Y. In this way, the yarn defect detection device 7 can measure the amount of received light that changes according to the yarn thickness, and can detect the defect portion generated in the spun yarn Y.

  The defect portion that can be detected by the yarn defect detection device 7 includes not only an abnormality in which a part of the spun yarn Y is too thick or too thin, but also a case where foreign matter such as polypropylene intervenes in the spun yarn Y. Further, the yarn defect detecting device 7 may employ a capacitance type sensor in addition to the optical sensor as described above.

  The tension stabilizing device 8 keeps the tension applied to the spun yarn Y moderately stable. As shown in FIG. 6, the tension stabilizing device 8 mainly includes a roller 81, a power unit 82, and a unraveling member 83. In addition, the arrow shown in the figure has shown the feed direction of the spun yarn Y. FIG.

  The roller 81 is a substantially cylindrical rotating body that draws the spun yarn Y from the air spinning device 6 and winds the spun yarn Y. The roller 81 is attached to the rotating shaft 82 a of the power unit 82 and is rotated by the power unit 82. Then, the spun yarn Y drawn from the pneumatic spinning device 6 is wound around the outer peripheral surface of the roller 81.

  The power unit 82 is an electric motor that is driven by being supplied with electric power. The power unit 82 rotates the roller 81 and keeps the rotation speed of the roller 81 constant at a predetermined value. Thereby, the winding speed of the spun yarn Y wound around the roller 81 can be kept constant.

  The unwinding member 83 is a yarn hooking member that assists in unwinding the spun yarn Y wound by rotating integrally or independently with the roller 81. One end of the unwinding member 83 is attached to the rotation shaft 84 of the roller 81. The other end portion of the unwinding member 83 is formed to be curved toward the outer peripheral surface of the roller 81. The unwinding member 83 enables the spun yarn Y to be unwound from the roller 81 by the spun yarn Y being hung on the curved portion. In addition, a permanent magnet that generates a resistance force against the rotation of the unwinding member 83 is disposed at the base of the rotating shaft 84 to which the unwinding member 83 is attached.

  With such a configuration, the unwinding member 83 has a low tension applied to the spun yarn Y, and rotates together with the roller 81 when defeating the above-described resistance force. On the other hand, the unwinding member 83 has a high tension applied to the spun yarn Y, and rotates independently from the roller 81 when the resistance force described above is overcome. In this way, the tension stabilizing device 8 can rotate the unwinding member 83 integrally or independently with the roller 81 in accordance with the tension applied to the spun yarn Y, and adjusts the unwinding speed of the spun yarn Y. Making it possible. In this way, the tension stabilizer 8 keeps the tension applied to the spun yarn Y moderately stable.

  The tension stabilizing device 8 can wind and store the spun yarn Y around the outer peripheral surface of the roller 81 even when the spun yarn Y that has been cut is spliced by a yarn splicing device (not shown). For this reason, the tension stabilizer 8 can absorb the slack of the spun yarn Y.

  The winding device 9 creates a substantially cylindrical (cheese-shaped) package P by winding the spun yarn Y. The winding device 9 is mainly composed of a drive roller 91 and a cradle (not shown) that rotatably holds the bobbin 92.

  The driving roller 91 is a rotating body that rotates the bobbin 92 and the package P by rotation. The drive roller 91 adjusts the rotational speed according to the change in the outer diameter of the package P, and maintains the peripheral speed of the package P constant. Thereby, the winding speed of the spun yarn Y wound around the bobbin 92 can be kept constant.

  The bobbin 92 is a substantially cylindrical rotating body that winds the spun yarn Y by rotating. The bobbin 92 is driven and rotated by a driving roller 91 that rotates while being in contact with the outer peripheral surface of the bobbin 92 or the package P. Since the winding device 9 traverses the spun yarn Y by a traversing device (not shown), it prevents the spun yarn Y from being biased in the package P.

  With such a configuration, the spun yarn Y guided to the bobbin 92 is wound around the outer peripheral surface of the bobbin 92 without being biased. In this way, the winding device 9 makes it possible to create a package P having a substantially cylindrical shape (cheese shape). In addition to the substantially cylindrical (cheese shape) package P as illustrated in FIG. 1, the winding device 9 can also create a substantially conical (cone shape) package P, for example.

  Next, the reason for the establishment of a spinning method using the air spinning device 6 that enables spinning according to the fiber characteristics and the air spinning device 6 that enables spinning according to the fiber characteristics will be described. To do.

  As described above, the pneumatic spinning device 6 manufactures the spun yarn Y by twisting the sliver F using the swirling airflow. In the space SC1 constituting the spinning chamber SC, the rear end portion of each fiber constituting the sliver F is reversed by the swirling airflow (refer to the two-dot chain line in FIGS. 3 and 4). Further, in the space SC2 constituting the spinning chamber SC, the rear end portion of each fiber constituting the sliver F is swirled by the swirling airflow (see the two-dot chain line in FIGS. 3 and 4).

  Here, for example, a synthetic fiber having a relatively long average fiber length and an average fiber length of 32 to 51 mm is assumed. In general, synthetic fibers have high rigidity due to their materials. Therefore, when the distance D between the spindle 62 and the fiber guide 61 is smaller than a predetermined value (for example, 2.6 mm), the rear end portion of the synthetic fiber is difficult to reverse, and as a result, a spun yarn Y with a weak twist is manufactured. Is done. More specifically, when the distance D between the spindle 62 and the fiber guide 61 is small (for example, less than 2.6 mm), the rear end of the synthetic fiber cannot be put on the swirling airflow, and the rear end It becomes difficult to reverse. For this reason, the synthetic fiber swirled in the space SC2 is reduced, and as a result, a spun yarn (sweet twisted yarn) Y having a weak twist is manufactured.

  On the other hand, when the distance D between the spindle 62 and the fiber guide 61 is larger than a predetermined value (for example, 2.6 mm), the rear end portion of the synthetic fiber is sufficiently reversed, and as a result, the spun yarn Y having a high twist is formed. Manufactured. More specifically, when the distance D between the spindle 62 and the fiber guide 61 is large (for example, 2.6 mm or more), the rear end portion of the synthetic fiber can easily ride the swirling airflow. Invert sufficiently. Therefore, the rear end portion of the synthetic fiber swirled in the space SC2 is introduced into the fiber passage 62s in a state where the synthetic fiber is sufficiently wound around the center fiber, and as a result, a twisted spun yarn (strong twisted yarn) Y is manufactured. Is done.

  However, if the distance D is too large (for example, larger than 4.1 mm), both ends of the synthetic fiber are swung in the spinning chamber SC without being constrained by the fiber guide 61 or the spindle 62, so that air spinning is performed. The frequency of discharge to the outside of the device 6 increases. Thereby, the malfunction that a fiber loss increases arises. Further, since the volume of the spinning chamber SC increases, the amount of air for forming the swirling airflow in the spinning chamber SC also increases, and the size of the pneumatic feeding device needs to be increased. Thereby, the problem that the spinning unit 1 is increased in size also occurred.

  In addition, description of said space | interval D and the strength of twist is not restricted to the case where the sliver F is entirely composed of synthetic fibers, and also applies to the case where synthetic fibers are contained in a high proportion in natural fiber sliver F. To do.

  Next, for example, a natural fiber having a relatively short average fiber length and an average fiber length of less than 32 mm is assumed. In general, natural fibers have low rigidity due to their materials. However, when the distance D between the spindle 62 and the fiber guide 61 is smaller than a predetermined value (for example, 1.6 mm), the rear end portion of the natural fiber is difficult to reverse. As a result, a spun yarn Y with a weak twist is manufactured. Is done. More specifically, when the distance D between the spindle 62 and the fiber guide 61 is small (for example, less than 1.6 mm), the rear end of the natural fiber cannot be placed on the swirling airflow, and the rear end It becomes difficult to reverse. For this reason, the natural fiber swirled in the space SC2 is reduced, and as a result, a spun yarn (sweet twisted yarn) Y with weak twist is manufactured.

  On the other hand, when the distance D between the spindle 62 and the fiber guide 61 is larger than a predetermined value (for example, 1.6 mm), the rear end portion of the natural fiber is sufficiently reversed. Manufactured. More specifically, when the distance D between the spindle 62 and the fiber guide 61 is large (for example, 1.6 mm or more), the rear end of the natural fiber can easily ride the swirling airflow. Invert sufficiently. For this reason, the rear end portion of the natural fiber swirled in the space SC2 is introduced into the fiber passage 62s in a state where the natural fiber is sufficiently wound around the center fiber, and as a result, a twisted spun yarn (strong twisted yarn) Y is manufactured. Is done.

  However, when the distance D is too large (for example, larger than 2.6 mm), both ends of the natural fiber are swung in the spinning chamber SC without being constrained by the fiber guide 61 or the spindle 62, so that air spinning is performed. The frequency of discharge to the outside of the device 6 increases. Thereby, the malfunction that a fiber loss increases arises. Further, since the volume of the spinning chamber SC increases, the amount of air for forming the swirling airflow in the spinning chamber SC also increases, and the size of the pneumatic feeding device needs to be increased. Thereby, the problem that the spinning unit 1 is increased in size also occurred.

  In addition, description of said space | interval D and the strength of twist is not restricted to the case where the sliver F is entirely composed of natural fibers, and the case where the natural fibers are contained in a high proportion in the sliver F of synthetic fibers and the average This also applies to synthetic fibers having a fiber length of less than 32 mm.

  As described above, the air spinning device 6 has a problem that it is easily affected by the fiber characteristics since the fiber is swirled using the swirling airflow. That is, the air spinning device 6 has a problem that the strength of twisting of the spun yarn Y to be manufactured varies depending on the fiber characteristics such as the average fiber length.

  Therefore, there has been a demand for establishment of a spinning method using an air spinning device 6 that enables spinning according to fiber characteristics, and an air spinning device 6 that enables spinning according to fiber characteristics.

  Next, a spinning method using the pneumatic spinning device 6 according to the first embodiment of the present invention will be described.

  In the spinning method according to the present embodiment, as a method for evaluating the quality of the spun yarn Y, the index is that the rolling strength RP is stable. The rolling strength RP is a value representing the stability of the yarn structure measured by rolling the spun yarn Y until the twist of the spun yarn Y is unwound. When the stability of the yarn structure of the spun yarn Y is high, the spun yarn Y is not unraveled even if the spun yarn Y is rotated a plurality of times, so the numerical value indicating the rolling strength RP is high. On the other hand, when the stability of the yarn structure of the spun yarn Y is low, the value indicating the rolling strength RP is low because the spun yarn Y is unwound immediately after rolling (see JP 2010-168708 for details). .

  In the spinning method according to the present embodiment, when a sliver F having an average fiber length of 32 mm or more is used as a raw material, an air spinning device in which a distance D between the spindle 62 and the fiber guide 61 is 2.6 mm or more and 4.1 mm or less. This is a spinning method in which No. 6 is used.

  The value of 2.6 mm or more and 4.1 mm or less is a value determined by a test using the twist strength of the spun yarn Y that changes according to the fiber characteristics as a parameter. Specifically, as shown in FIG. 7, when the distance D between the spindle 62 and the fiber guide 61 is set to 2.6 mm or more and 4.1 mm or less, the rolling strength RP exceeds the reference value B and is stabilized. It becomes possible to stabilize the quality of the yarn Y. In addition, the value of 2.6 mm or more and 4.1 mm or less is a plurality of kinds of natural fiber sliver F, synthetic fiber sliver F, and sliver F partly including synthetic fiber. Compatible with sliver F.

  Therefore, the pneumatic spinning device 6 used in the spinning method according to the present embodiment is characterized in that the distance D between the spindle 62 and the fiber guide 61 is set to 2.6 mm or more and 4.1 mm or less.

  Thereby, according to the spinning method which concerns on this embodiment, and the air spinning apparatus 6 used by this spinning method, it is possible to stabilize the quality of the spun yarn Y manufactured from the sliver F whose average fiber length is 32 mm or more. It becomes.

  When the sliver F having an average fiber length of 32 mm or more is used as a raw material, it is more effective to set the distance D between the spindle 62 and the fiber guide 61 to 3.1 mm or more and 3.6 mm or less.

  More specifically, as shown in FIG. 7, when the distance D between the spindle 62 and the fiber guide 61 is 3.1 mm or more and 3.6 mm or less, the rolling strength RP becomes more stable and the quality of the spun yarn Y is improved. It is because it becomes possible to improve. In addition, the value of 3.1 mm or more and 3.6 mm or less is a plurality of types such as natural fiber sliver F, synthetic fiber sliver F, and sliver F partly including synthetic fiber. Compatible with sliver F.

  Therefore, it is desirable for the pneumatic spinning device 6 used in the spinning method according to the present embodiment to set the distance D between the spindle 62 and the fiber guide 61 to 3.1 mm or more and 3.6 mm or less.

  Thereby, according to the spinning method which concerns on this embodiment, and the air spinning apparatus 6 used by this spinning method, it is possible to improve the quality of the spun yarn Y manufactured from the sliver F whose average fiber length is 32 mm or more. It becomes.

  In addition, even if this pneumatic spinning device 6 forms the fiber guide 61 and the nozzle block 63 integrally, for example, there is no difference in the objective and effect of this invention, and it belongs to the technical scope of this invention. Further, even if the pneumatic spinning device 6 is configured by integrating the spindle 62 and the nozzle block 63, for example, there is no difference in the object and effect of the present invention, and it belongs to the technical scope of the present invention.

  Next, a spinning method using the pneumatic spinning device 6 according to the second embodiment of the present invention will be described.

  The spinning method according to the present embodiment is a pneumatic spinning device in which the distance D between the spindle 62 and the fiber guide 61 is 1.6 mm or more and less than 2.6 mm when the sliver F having an average fiber length of less than 32 mm is used as a raw material. This is a spinning method in which No. 6 is used.

  The value of 1.6 mm or more and less than 2.6 mm is a value determined by a test using the twist strength of the spun yarn Y that changes according to the fiber characteristics as a parameter. More specifically, as shown in FIG. 8, when the distance D between the spindle 62 and the fiber guide 61 is set to 1.6 mm or more and less than 2.6 mm, the rolling strength RP exceeds the reference value B and becomes stable. It becomes possible to stabilize the quality of the yarn Y. The value of 1.6 mm or more and less than 2.6 mm is a plurality of types of sliver F such as a natural fiber sliver F having an average fiber length of less than 32 mm, a synthetic fiber sliver F, and a sliver F partially including a synthetic fiber. It can correspond to.

  Therefore, the pneumatic spinning device 6 used in the spinning method according to the present embodiment is characterized in that the distance D between the spindle 62 and the fiber guide 61 is set to 1.6 mm or more and less than 2.6 mm.

  Thereby, according to the spinning method which concerns on this embodiment, and the air spinning apparatus 6 used by this spinning method, it is possible to stabilize the quality of the spun yarn Y manufactured from the sliver F whose average fiber length is less than 32 mm. It becomes.

  When the sliver F having an average fiber length of less than 32 mm is used as a raw material, it is more effective to set the distance D between the spindle 62 and the fiber guide 61 to 1.8 mm or more and 2.3 mm or less.

  More specifically, as shown in FIG. 8, when the distance D between the spindle 62 and the fiber guide 61 is 1.8 mm or more and 2.3 mm or less, the rolling strength RP becomes more stable, and the quality of the spun yarn Y is improved. It is because it becomes possible to improve. A value of 1.8 mm or more and 2.3 mm or less indicates a plurality of types of sliver F, such as a natural fiber sliver F having an average fiber length of less than 32 mm, a synthetic fiber sliver F, and a sliver F partially including a synthetic fiber. It can correspond to.

  Therefore, it is desirable for the pneumatic spinning device 6 used in the spinning method according to the present embodiment to set the distance D between the spindle 62 and the fiber guide 61 to 1.8 mm or more and 2.3 mm or less.

  Thereby, according to the spinning method which concerns on this embodiment, and the air spinning apparatus 6 used with this spinning method, it is possible to improve the quality of the spun yarn Y manufactured from the sliver F whose average fiber length is less than 32 mm. It becomes.

  In addition, even if this pneumatic spinning device 6 forms the fiber guide 61 and the nozzle block 63 integrally, for example, there is no difference in the objective and effect of this invention, and it belongs to the technical scope of this invention. Further, even if the pneumatic spinning device 6 is configured by integrating the spindle 62 and the nozzle block 63, for example, there is no difference in the object and effect of the present invention, and it belongs to the technical scope of the present invention.

  The spinning method using the pneumatic spinning device 6 as described above can be realized with a configuration in which the distance D is changed by replacing the fiber guide 61 with a different shape. Further, it can be realized by a structure in which the interval D is changed by adjusting the mounting position of the spindle 62. Further, a plurality of pneumatic spinning devices 6 having different intervals D may be prepared and replaced with pneumatic spinning devices 6 suitable for the type of sliver F.

  The spinning unit 1 includes an input screen 10 for inputting the type of the sliver F, and has a function of displaying the pneumatic spinning device 6 suitable for the type of the sliver F. FIG. 9 is a diagram showing a display of the pneumatic spinning device 6 suitable for the type of sliver F.

  For example, when the operator inputs a sliver F of polyester fiber having an average fiber length of about 38 mm, which is a typical synthetic fiber, the distance D between the spindle 62 and the fiber guide 61 is set to 3.1 mm or more and 3.6 mm or less. The pneumatic spinning device 6 (in FIG. 9, pneumatic spinning device a) is displayed. For example, when the operator inputs a cotton fiber sliver F having a mean fiber length of about 25.4 mm, which is a typical natural fiber, the distance D between the spindle 62 and the fiber guide 61 is 1.8 mm or more. The pneumatic spinning device 6 (pneumatic spinning device b in FIG. 9) set to 3 mm or less is displayed.

  Thereby, the pneumatic spinning device 6 according to the fiber characteristics can be selected without mistake, and confusion when changing the sliver F used as the raw material to the sliver F having different fiber characteristics can be prevented.

  The spinning unit 1 has a configuration in which the spun yarn Y spun by the pneumatic spinning device 6 is pulled out by the tension stabilizing device 8 and temporarily stored. However, the spinning unit 1 is not limited to such a configuration. For example, a delivery roller and a nip roller may be arranged on the downstream side of the pneumatic spinning device 6, and the spun yarn Y may be drawn from the pneumatic spinning device 6 by the delivery roller and the nip roller. Further, the tension stabilizing device 8 may be disposed on the downstream side of the delivery roller and the nip roller to temporarily store the spun yarn Y. Alternatively, the tension stabilizing device 8 may be omitted, and the yarn Y may be directly wound by the winding device 9.

DESCRIPTION OF SYMBOLS 1 Spinning unit 4 Sliver supply unit 41 Sliver case 42 Sliver guide 5 Draft device 51 Back roller pair 52 Third roller pair 53 Middle roller pair 54 Front roller pair 6 Air spinning device 61 Fiber guide 61g Fiber introduction path 62 Spindle 62s Fiber passage path 63 Nozzle block 7 Thread defect detecting device 71 Light source unit 72 Light receiving unit 73 Casing 8 Tension stabilizing device 81 Roller 82 Power unit 83 Unwinding member 9 Winding device 91 Drive roller 92 Bobbin 10 Input screen D Interval F Fiber bundle (sliver)
Y spun yarn P package RP rolling strength SC spinning room

Claims (11)

A fiber guide formed with a fiber introduction path communicating with the spinning chamber;
A spinning method for producing a spun yarn from a fiber bundle as a raw material using an air spinning device having a spindle formed with a fiber passageway through which the fiber swirled in the spinning chamber passes,
When a fiber bundle having an average fiber length of 32 mm or more is used as a raw material, an air spinning device having a distance between the spindle and the fiber guide of 2.6 mm or more and 4.1 mm or less is used. A spinning method using an air spinning device.   When a fiber bundle having an average fiber length of 32 mm or more is used as a raw material, an air spinning device having a distance between the spindle and the fiber guide of 3.1 mm to 3.6 mm is used. A spinning method using the pneumatic spinning device according to claim 1.   A fiber bundle having an average fiber length of 32 mm or more used as a raw material in the pneumatic spinning device includes a fiber bundle of natural fibers, a fiber bundle of synthetic fibers, and a synthetic fiber having an average fiber length of 32 mm or more and 51 mm or less. The spinning method using the pneumatic spinning device according to claim 1 or 2, wherein the fiber spinning bundle is a fiber bundle. A fiber guide formed with a fiber introduction path communicating with the spinning chamber;
A spinning method for producing a spun yarn from a fiber bundle as a raw material using an air spinning device having a spindle formed with a fiber passageway through which the fiber swirled in the spinning chamber passes,
When a fiber bundle having an average fiber length of less than 32 mm is used as a raw material, an air spinning device having a distance between the spindle and the fiber guide of 1.6 mm or more and less than 2.6 mm is used. A spinning method using an air spinning device.   When a fiber bundle having an average fiber length of less than 32 mm is used as a raw material, an air spinning device having an interval between the spindle and the fiber guide of 1.8 mm or more and 2.3 mm or less is used. A spinning method using the pneumatic spinning device according to claim 4. A fiber guide formed with a fiber introduction path communicating with the spinning chamber;
In a pneumatic spinning apparatus for producing spun yarn using a fiber bundle having an average fiber length of 32 mm or more as a raw material, and a spindle formed with a fiber passageway through which the fiber swirled in the spinning chamber passes.
An air spinning device characterized in that an interval between the spindle and the fiber guide is set to 2.6 mm or more and 4.1 mm or less.   The pneumatic spinning device according to claim 6, wherein a distance between the spindle and the fiber guide is set to be 3.1 mm or greater and 3.6 mm or less.   A fiber bundle of natural fibers having an average fiber length of 32 mm or more and 51 mm or less, a fiber bundle of synthetic fibers, and a fiber bundle partially containing synthetic fibers are used as raw materials. The pneumatic spinning device described. A fiber guide formed with a fiber introduction path communicating with the spinning chamber;
In a pneumatic spinning apparatus for producing a spun yarn using a fiber bundle having an average fiber length of less than 32 mm as a raw material, and a spindle formed with a fiber passageway through which the fiber swirled in the spinning chamber passes.
An air spinning device characterized in that a distance between the spindle and the fiber guide is set to 1.6 mm or more and less than 2.6 mm.   The pneumatic spinning device according to claim 9, wherein a distance between the spindle and the fiber guide is set to 1.8 mm or more and 2.3 mm or less.   The pneumatic spinning device according to any one of claims 6 to 10, further comprising an input screen for inputting a type of fiber bundle used as a raw material.

Images