JP6484425B2 - Spinning and drawing method - Google Patents

Description

The present invention relates to a spinning drawing method for drawing a yarn spun from a spinning device.

  2. Description of the Related Art A spinning / drawing device is known that includes a plurality of rollers that draw and heat-set yarn spun from a spinning device.

  There exists a thing of patent document 1 as such a spinning drawing apparatus. The spinning drawing apparatus includes a plurality of preheating heating rollers (heating rollers) and a plurality of heat fixing heating rollers (tempering rollers). In this spinning and drawing apparatus, the yarn is wound around a plurality of preheating heating rollers and then wound around a plurality of heat fixing heating rollers arranged above them. The surface of the preheating roller is set to a temperature at which the yarn can be drawn. Further, the surface of the heat fixing heating roller is set to a temperature higher than the surface of the preheating heating roller so that the drawn yarn can be heat fixed. Further, the yarn feeding speed of the heat fixing heating roller is set to be higher than that of the preheating heating roller. The yarn preheated by the plurality of preheating heating rollers is a roller arranged at the most downstream in the yarn traveling direction among the plurality of preheating heating rollers, and a plurality of heat fixing heating rollers, It is stretched between the rollers arranged at the most upstream in the yarn traveling direction. The drawn yarn is heat-fixed by a plurality of heat-fixing heating rollers.

  Patent Document 2 describes a spinning and drawing apparatus that can produce a yarn having a predetermined boiling water shrinkage rate by setting the heating temperature of a heat-fixing heating roller that heat-fixes the yarn to a predetermined temperature. . Furthermore, Patent Document 2 describes that a yarn having a lower boiling water shrinkage can be produced as the surface temperature of the heat fixing heating roller in contact with the yarn is higher.

JP 2011-122276 A JP 2003-105628 A

  By the way, the higher the surface temperature of the heat fixing heating roller, the greater the amount of heat released from the roller, resulting in wasted heat energy. Further, since the heated yarn having a large amount of heat is sent to the outside from the heat insulation box that accommodates the roller with a heated accompanying air flow, heat energy is further wasted. Therefore, from the viewpoint of energy saving, it is desired to keep the surface temperature of the heat roller for heat setting as low as possible when obtaining a yarn having a low boiling water shrinkage.

  However, in the spinning winder described in Patent Document 2, in order to obtain a yarn having a low boiling water shrinkage, the surface temperature of the heat roller for heat setting must be set high, resulting in a large energy loss.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a spinning drawing method capable of obtaining a yarn having a low boiling water shrinkage rate while keeping the surface temperature of a heat roller for heat setting low. It is to be.

A spinning drawing method according to a first aspect of the present invention includes a plurality of rollers arranged along a yarn path for drawing a yarn spun from a spinning device, and a speed control for controlling the yarn feeding speeds of the plurality of rollers, respectively. Each of the plurality of rollers is wound around the thread at a winding angle of less than 270 degrees, and the plurality of rollers are fed from at least one first roller and the first roller. And a plurality of second rollers that are heating rollers each having a yarn feeding speed higher than the yarn feeding speed of the first roller, and the temperature of the plurality of second rollers is A spinning / drawing method in a spinning / drawing apparatus further comprising a temperature control unit for controlling each of the rollers , wherein the speed control unit includes a roller disposed on the downstream side in the yarn traveling direction of the two adjacent second rollers. yarn The feeding speed is set to be equal to or lower than the yarn feeding speed of a roller arranged upstream in the yarn traveling direction, and the second roller in the most upstream direction in the yarn traveling direction and the first roller in the most downstream direction in the yarn traveling direction among the second rollers. the deceleration rate of the yarn feed speed of the second roller, is controlled to be 2% or more, as boiling water shrinkage percentage of the obtained yarn becomes a desired value, the feed yarn of the plurality of second rollers to the speed control unit Rutotomoni to control the speed, respectively, each to control the plurality of temperature of the second roller to the temperature control unit is characterized in Rukoto.

In the present invention, the plurality of rollers including the second roller are each wound with a yarn at a winding angle of less than 270 degrees. In the case where the yarn is wound a plurality of times between the plurality of second rollers, the surface speeds of the plurality of rollers need to be the same, whereas in the present invention, each of the plurality of second rollers On the other hand, since the yarn is hung on one side, the yarn feeding speeds of the plurality of second rollers can be set freely.

In the present invention, the speed control unit sets the yarn feed speed of a roller arranged downstream in the yarn traveling direction among the plurality of second rollers to be equal to or lower than the yarn feed speed of the roller arranged upstream in the yarn running direction. To do. As a result, the stretched yarn contracts by being relaxed by the plurality of second rollers for heat setting, so the boiling water shrinkage rate of the produced yarn is reduced. Furthermore, in the present invention, the deceleration rate of the yarn feed speed of the second roller at the most upstream in the yarn traveling direction and the second roller at the most downstream in the yarn traveling direction is 2% or more. As described above, the deceleration rate of the yarn feed speed between the most upstream second roller and the most downstream second roller in the yarn traveling direction (total deceleration rate of the plurality of second rollers) is as large as 2% or more. Thus, the yarn is heat-fixed in the plurality of second rollers while being sufficiently relaxed. Therefore, it is possible to obtain a yarn having a low boiling water shrinkage rate while keeping the surface temperature of the plurality of second rollers low.
In the present invention, since the temperature control unit can freely set and control the temperature of the yarn feeding speed of the plurality of second rollers, a yarn having a low boiling water shrinkage can be easily obtained.

Spinning stretching method of the second invention, in the first invention, the speed control unit, between two of said second roller adjacent in the yarn traveling direction, the deceleration rate of the yarn feeding speed, and less than 5% is a control that is characterized in Rukoto.

  Here, if the rate of deceleration of the yarn feed speed is too large between two rollers adjacent in the yarn traveling direction, the slack of the yarn becomes large and the yarn path becomes unstable. When the yarn path becomes unstable, the yarn may be wound around the roller.

  In the present invention, the deceleration rate of the yarn feed speed is less than 5% between the two second rollers adjacent in the yarn traveling direction. Therefore, in the two second rollers adjacent to each other in the yarn traveling direction, the yarn path may become unstable due to the slackness of the yarn caused by decelerating the downstream second roller relative to the upstream second roller. It is suppressed. Thereby, the winding of the thread | yarn around the some 2nd roller, the thread breakage, etc. are suppressed.

Spinning drawing method of the third invention, in the first or second aspect, wherein it is the second roller is three or more, the the speed control unit, of the two adjacent yarn traveling direction and the second roller between in, and is characterized in Rukoto to the control of all of 1% or more the deceleration rate of the yarn feed speed.

  When there are three or more second rollers, a plurality of yarn traveling sections exist between the second rollers. In the present invention, in all the yarn traveling sections between the plurality of second rollers, the deceleration rate of the yarn feeding speed is set to 1% or more, respectively. The total deceleration rate is increased by appropriately increasing the deceleration rate of each yarn traveling section. Therefore, it is possible to obtain a yarn having a low boiling water shrinkage rate while keeping the surface temperature of the plurality of second rollers low.

According to a fourth aspect of the present invention, there is provided the spinning drawing method according to the third aspect, wherein the number of the second rollers is three or more, and the speed control unit feeds the yarn between the two second rollers adjacent in the yarn traveling direction. the deceleration rate of the speed, is characterized in Rukoto to the control of the same for a plurality of sections.

  In the present invention, there are a plurality of yarn traveling sections between the plurality of second rollers, and the deceleration rate of the yarn feed speed is the same for the plurality of sections. Thereby, the total deceleration rate can be maximized while equalizing the deceleration rates in the plurality of sections. Therefore, it is possible to obtain a yarn having a low boiling water shrinkage rate while keeping the surface temperature of the plurality of second rollers low. In the present invention, “the rate of deceleration of the yarn feed speed is the same for a plurality of sections” is not limited to the case where the rate of deceleration is completely the same, but slightly so as not to affect the boiling water shrinkage rate. It is a concept that includes different cases.

It is a front view which shows the structure of the spinning takeover machine which concerns on embodiment of this invention. It is a side view of the spinning take-up machine which concerns on embodiment of this invention. It is an enlarged front view of a spinning drawing apparatus. (A) is a table showing the relationship between the temperature of the heat fixing godet roller and the contraction rate of boiling water when the heat fixing godet roller is not decelerated, and (b) is the temperature of the heat fixing godet roller fixed at 160 ° C. (C) is a table showing the relationship between the deceleration rate of the heat fixing godet roller and the boiling water shrinkage rate, and (c) is an example of the roller temperature and deceleration rate conditions when producing a yarn having a boiling water shrinkage rate of 11%. It is a table | surface which shows. (A) is a graph showing the relationship between the surface temperature of the heat fixing godet roller and the boiling water shrinkage obtained from the data of FIG. 4 (a), and (b) is obtained from the data of FIG. 4 (b). It is a graph which shows the relationship between the deceleration rate of a heat setting godet roller, and a boiling water shrinkage | contraction rate.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing a configuration of a spinning take-up machine provided with a spinning stretcher according to an embodiment of the present invention. FIG. 2 is a side view of the spinning take-up machine. Hereinafter, each direction shown in FIGS. 1 and 2 will be described as a vertical direction, a horizontal direction, and a front-back direction. As shown in FIGS. 1 and 2, the spinning take-up machine 1 includes a spinning drawing device 2 and a yarn winding device 3. The yarn take-up machine 1 draws a plurality of yarns Y spun from the spinning device 4 at the upper side and continuously supplied by the yarn drawing device 2 and sends the yarn Y to the yarn winding device 3. Yarn Y is wound up. The yarn Y is made of, for example, polyester or nylon.

  The spinning and stretching device 2 includes a plurality of godet rollers 14 to 18 (a plurality of rollers) for stretching the yarn Y spun from the spinning device 4. The specific configuration of the spinning stretcher 2 will be described in detail later.

  The yarn winding device 3 is disposed below the spinning device 4 and winds the plurality of yarns Y drawn by the spinning drawing device 2 around the plurality of bobbins B to form a plurality of packages P. The yarn winding device 3 includes guide rollers 5 and 6, a plurality of fulcrum guides 7, and two winding units 8.

  The guide rollers 5 and 6 are drive rollers driven by a drive motor (not shown). The guide rollers 5 and 6 are disposed such that the axial direction is parallel to the left-right direction. The guide roller 6 is disposed behind and above the guide roller 5. A plurality of yarns Y sent from the spinning and drawing apparatus 2 are sent to a plurality of fulcrum guides 7 below by the guide rollers 5 and 6.

  The plurality of fulcrum guides 7 are located below the guide rollers 6 and above the plurality of traverse guides 12 of the winding unit 8 to be described later, and are true of the plurality of traverse guides 12 and the plurality of bobbins B mounted on the bobbin holder 11. Above, it arrange | positions along with the space | interval same as the space | interval of the several bobbin B along the front-back direction.

  The winding unit 8 includes a main body frame 9, a disc-shaped turret 10 rotatably provided on the main body frame 9, and a cantilever supported by the turret 10. A winding shaft extends horizontally, and a plurality of bobbins Two bobbin holders B mounted in series along the axial direction of the take-up shaft, a traverse guide 12 that traverses the yarn Y, and a contact roller that makes contact with the bobbin B mounted on the bobbin holder 11 13 and so on.

  The winding unit 8 rotates a plurality of bobbins B mounted on the bobbin holder 11 by rotating the bobbin holder 11 by driving a motor (not shown), and winds a plurality of yarns Y around the rotating bobbins B. At this time, the yarn Y wound around the bobbin B is traversed in the axial direction of the bobbin B with the fulcrum guide 7 as a fulcrum by the traverse guides 12 respectively disposed above the plurality of bobbins B.

  Then, the yarn Y traversed by the traverse guide 12 with the fulcrum guide 7 as a fulcrum is wound around the bobbin B to form a package P. At this time, the contact roller 13 contacts the outer peripheral surface of the package P during winding onto the bobbin B, rotates while applying a predetermined contact pressure, and adjusts the shape of the package P. When the plurality of packages P wound on the plurality of bobbins B mounted on the bobbin holder 11 are fully wound, the turret 10 is rotated by a drive device (not shown) to hold the fully wound package P. The bobbin holder 11 moves to the standby position, and the bobbin holder 11 at the standby position moves to the winding position. Furthermore, the yarn switching device (not shown) is operated to switch the yarn Y wound around the full-winding package P to the bobbin B at the winding position, so that the yarn Y is continuously wound. Further, the full package P is pushed forward by a pusher (not shown) and removed from the bobbin holder 11.

  Next, a specific configuration of the spinning drawing apparatus 2 will be described. The spinning drawing device 2 is disposed below the spinning device 4. As shown in FIGS. 1 to 3, the spinning and drawing apparatus 2 includes a plurality of godet rollers 14 to 18 (a plurality of rollers), a heat retaining box 19, guide rollers 20 and 21, guides 25 and 26, and a control device 27. And. 1 and 3, the inside of the heat insulation box 19 is shown so that it can be seen.

  The plurality of godet rollers 14 to 18 are arranged along the yarn path, and are used to draw and heat-fix the yarn Y spun from the spinning device 4. Each of the plurality of godet rollers 14 to 18 is a drive roller that is rotated by a drive motor (not shown) that is cantilevered by a frame (not shown). Each of the plurality of godet rollers 14 to 18 is a heating roller in which a heater (not shown) is provided. The surface temperature of the godet rollers 14 to 18 is maintained at a predetermined temperature by controlling the heater by the control device 27 described later.

  The godet rollers 14 and 15 (first rollers) are preheating godet rollers for heating the yarn Y before drawing, in which the yarn Y before drawing travels. Here, in order to draw the yarn Y made of a resin having a glass transition temperature higher than room temperature, such as polyester, it is necessary to heat the surface of the godet roller in contact with the yarn Y to a temperature equal to or higher than the glass transition temperature. Accordingly, the surface temperatures of the godet rollers 14 and 15 with which the yarn Y is in contact are maintained at a temperature equal to or higher than the glass transition temperature by a heater (not shown) provided therein. As will be described later, when a yarn Y made of a resin having a glass transition temperature close to room temperature, such as nylon, is stretched, it is not always necessary to perform preheating before stretching. In this case, the godet rollers 14 and 15 may be non-heating rollers.

  The godet rollers 14 and 15 have substantially the same rotation speed (yarn feed speed). The yarn feed speeds of the preheating godet rollers 14 and 15 may be different from each other.

  The godet rollers 16 to 18 (second rollers) are heat setting godet rollers for heat fixing the stretched yarn Y. The surface temperature of the godet rollers 16 to 18 with which the yarn Y contacts is maintained at a temperature higher than the surface temperature of the godet rollers 14 and 15 for preheating by a heater (not shown) provided inside. In addition, when drawing the yarn Y whose glass transition temperature is close to room temperature, it is not always necessary to preheat before drawing, but when using a preheating godet roller with a built-in heater, the surface temperature of the godet rollers 16 to 18 is Set higher than the glass transition temperature. For example, when the yarn Y is made of polyester, the surface temperature of the preheating godet rollers 14 and 15 is 80 degrees or more, and when the yarn Y is nylon, the surface temperature of the preheating godet rollers 14 and 15 is 50 degrees or more. Is set. The surface temperatures of the godet rollers 16 to 18 are substantially equal.

  Further, by a control device to be described later, in the godet rollers 16 to 18, the yarn feed speed of the rollers arranged on the downstream side in the yarn running direction is set to be equal to or lower than the yarn feed speed of the rollers arranged on the upstream side in the yarn running direction. That is, the godet rollers 16 to 18 have the same or slower yarn feed speed in the order of the godet rollers 16, 17 and 18. More specifically, in the godet roller 16 on the most upstream side in the yarn traveling direction and the godet roller 18 on the most downstream side in the yarn traveling direction, the yarn feed speeds are maximum and minimum in the godet rollers 16, 17, and 18, respectively. The total deceleration rate of the yarn feed speed between the godet rollers 16 and 18 is 2% or more. Note that the total yarn feed speed reduction rate (%) of the heat fixing godet rollers 16 to 18 is Va as the yarn feed speed of the godet roller 16 disposed on the most upstream side, and the godet roller 18 disposed on the most downstream side. This is a value represented by 100 × (Va−Vb) / Va, where Vb is the yarn feed speed.

  Further, in the two adjacent godet rollers 16 and 17, the rate of reduction of the yarn feed speed between the godet roller 16 disposed on the upstream side and the godet roller 17 disposed on the downstream side is 1% or more and less than 5%. It is. Further, in the two godet rollers 17 and 18, the rate of reduction of the yarn feed speed between the godet roller 17 arranged on the upstream side and the godet roller 18 arranged on the downstream side is similarly 1% or more and less than 5%. It is. The rate of reduction of the yarn feed speed between the two godet rollers is the same between the godet rollers 16 and 17 and the godet rollers 17 and 18. The deceleration rate (%) between two adjacent godet rollers is 100 × when the yarn feed speed of the godet roller arranged on the upstream side is V1, and the yarn feed speed of the godet roller arranged on the downstream side is V2. It is a value represented by (V1-V2) / V1. The speed reduction rate between the godet rollers 16 and 17 and the speed reduction rate between the godet rollers 17 and 18 are not only the case where the speed reduction rates of both are completely the same, but also do not affect the physical properties of the yarn. Including the case where it is slightly different.

  Although the speed reduction rate between the godet rollers 16 and 17 and the speed reduction rate between the godet rollers 17 and 18 are slightly different, an example that may be regarded as substantially “same” is shown below. In general, in the speed control of the godet rollers 14 to 18 by the control device 27, a target yarn feed speed value is set for each of the rollers 14 to 18. That is, in the heat fixing godet rollers 16-18, the speed reduction rate between the godet rollers 16, 17 and the godet roller are not set in the form of the deceleration rate, but as a result of setting the target speed value of each roller 16-18. The deceleration rate between 17 and 18 is automatically determined.

For example, it slowed 2% between the godet rollers 16 and 17, further likewise decelerated 2% between godet roller 1 7, 1 8, consider a case of decelerating 4% total between godet rollers 16-18. Specifically, the yarn feed speed of the godet roller 16 is 5000 m / min, the yarn feed speed of the godet roller 17 is 4900 m / min, and the yarn feed speed of the godet roller 18 is 4800 m / min. At this time, in the total section of the godet rollers 16 to 18, the speed is 5000 m / min → 4800 m / min, and the total deceleration rate is 4%. However, looking at each of the two sections, the speed reduction rate is 2% at 5000 m / min → 4900 m / min between the godet rollers 16 and 17, but 4900 m / min → 4800 m / min between the godet rollers 17 and 18. The deceleration rate becomes 2.04%. In the present embodiment, the case where the deceleration rate between the godet rollers 16 and 17 and the deceleration rate between the godet rollers 17 and 18 are “same” includes the case where a slight difference occurs due to the above factors.

  The plurality of godet rollers 14 to 18 have respective axes that are parallel to each other, and the rotation shaft extends in the depth direction of the paper surface of FIGS. 1 and 3. The plurality of godet rollers 14 to 18 have substantially the same diameter. The diameters of the plurality of godet rollers 14 to 18 are in the range of 220 to 300 mm. The plurality of godet rollers 14 to 18 are arranged such that the godet rollers 16 to 18 for heat fixation are positioned above the godet rollers 14 and 15 for preheating. The plurality of godet rollers 14 to 18 are arranged in a staggered manner from the bottom to the top in the order of the godet rollers 14, 15, 16, 17, and 18.

  The godet rollers 14, 16, and 18 are rotating in the clockwise direction as indicated by arrows in FIGS. Further, the godet rollers 15 and 17 are rotating in the counterclockwise direction as indicated by arrows in FIGS. That is, the two godet rollers 14 and 15, the godet rollers 15 and 16, the godet rollers 16 and 17, and the godet rollers 17 and 18 that are adjacent to each other in the traveling direction of the yarn Y have opposite rotation directions.

  Each of the godet rollers 14 to 18 has a winding angle of less than 270 degrees (angle θ in FIG. 3), and is directed from the bottom to the top in the order of the godet rollers 14, 15, 16, 17, and 18 along the respective rotation directions. Thread Y is hooked. In other words, each of the two godet rollers 14 and 15, the godet rollers 15 and 16, the godet rollers 16 and 17, and the godet rollers 17 and 18 that are adjacent to each other in the traveling direction of the yarn Y is threaded in an S shape. Therefore, the yarn Y travels in the common inscribed line direction of the adjacent godet rollers between the two godet rollers 14 and 15 adjacent to each other in the traveling direction of the yarn Y, the godet rollers 15 and 16, the godet rollers 16 and 17, and the godet rollers 17 and 18. .

  The heat insulation box 19 is for accommodating the plurality of godet rollers 14 to 18. The heat insulation box 19 is a substantially rectangular parallelepiped box. The heat insulating box 19 is made of a heat insulating material. As a result, heat generated from the godet rollers 14 to 18 does not escape from the heat retaining box 19 to the outside, and the inside is kept warm. The temperature inside the heat insulation box 19 is higher than the lower temperature due to the fact that the heat fixing godet rollers 16 to 18 having a high surface temperature are arranged on the upper side and heat convection. A plurality of partition walls 24 are provided inside the heat insulation box 19 in order to prevent the surface temperatures of the plurality of godet rollers 14 to 18 from affecting each other's surface temperature. Specifically, the plurality of partition walls 24 are provided between two godet rollers so as to partition the godet rollers arranged in the vertical direction.

  In addition, the heat insulation box 19 is provided with two slits 22 and 23 above and below the same side surface (right side surface in the figure). The yarn Y spun from the spinning device 4 and guided by the guide roller 20 through guides 25 and 26 described later is guided into the heat retaining box 19 from the lower slit 22. Thereafter, as described above, the godet rollers 14 to 18 are respectively wound and guided from the upper slit 23 to the outside of the heat insulation box 19.

  The guide rollers 20 and 21 are drive rollers that are rotated by drive motors (not shown) provided respectively. The guide rollers 20 and 21 are non-heating rollers.

  The guide roller 20 is disposed outside the heat insulation box 19 and at a position (right side in the figure) shifted from the slit 22 of the heat insulation box 19 in the left-right direction. The guide roller 20 changes the yarn path of the yarn Y spun downward from the spinning device 4 through guides 25 and 26 described later, and guides the yarn Y to the slit 22 provided in the heat retaining box 19.

The guide roller 21 is disposed outside the heat insulation box 19 and at a position (right side in the drawing ) shifted in the left-right direction from the slit 23 of the heat insulation box 19. Of the plurality of godet rollers 14 to 18, the guide roller 21 is wound with the yarn Y sent from the godet roller 18 disposed on the most downstream side in the yarn traveling direction. The guide roller 21 changes the yarn path of the yarn Y guided to the outside of the heat insulation box 19 through the slit 23 of the heat insulation box 19 and guides the yarn Y to the guide roller 5.

  The guide 25 is disposed below the spinning device 4. The guide 25 is for bending the yarn Y spun downward from the spinning device 4 from the rear to the front. The bent yarn Y is guided to the guide 26.

  The guide 26 is disposed in the vicinity of the guide roller 20. The guide 26 is for bending the yarn Y from above to below. The bent yarn Y is guided to the guide roller 20.

  The control device 27 (corresponding to the speed control unit and the temperature control unit of the present invention) drives the godet rollers 14 to 18 respectively (not shown) and the godet rollers 14 to 18 with which the yarn Y contacts the surfaces. The heater and the guide rollers 20 and 21 are connected to various driving units of the spinning and drawing apparatus 2 such as a driving motor (not shown) that drives the respective rollers.

  The control device 27 individually controls drive motors (not shown) that drive the godet rollers 14 to 18, respectively, and adjusts the yarn feed speed of each godet roller to a predetermined speed. Further, the control device 27 individually controls heaters (not shown) that respectively heat the surfaces of the godet rollers 14 to 18 with which the yarn Y contacts, and adjusts the surface temperature of each godet roller to a predetermined temperature. The control device 27 individually controls drive motors that drive the guide rollers 20 and 21, respectively, and adjusts the yarn feed speed of each godet roller to a predetermined speed.

  Next, a process of drawing the yarn Y by the plurality of godet rollers 14 to 18 will be described.

  First, when the yarn Y guided from the slit 22 into the heat insulation box 19 is made of polyester, for example, it is preheated to a temperature equal to or higher than the glass transition temperature by contacting the surface of the preheating godet rollers 14 and 15. The The preheated yarn Y is sent to the heat fixing godet rollers 16 to 18 downstream of the yarn traveling direction by the rotational drive of the preheating godet rollers 14 and 15. Here, as described above, the heat fixing godet rollers 16 to 18 downstream in the yarn traveling direction have a yarn feeding speed faster than the preheating godet rollers 14 and 15. Accordingly, the yarn Y is accelerated between the preheating godet roller 15 and the heat fixing godet roller 16. Thereby, the yarn Y is stretched. When the yarn Y is a yarn having a glass transition temperature close to room temperature such as nylon, for example, the preheating godet rollers 14 and 15 may be non-heating rollers.

The drawn yarn Y is heat-fixed by contacting the heat-setting godet rollers 16-18. Here, on the godet rollers 16 to 18, the yarn Y is hung on the godet rollers 16 to 18 in the order of the godet rollers 16, 17, and 18 from the bottom to the top at a winding angle of less than 270 degrees. Here, in the case of a configuration in which yarn is wound a plurality of times between a plurality of godet rollers, which has been well known, the surface speeds of the plurality of rollers need to be the same. In the present embodiment, since the yarn is hung pieces for each godet rollers 16 to 18, it is possible to set the yarn feeding speed of the godet roller 16-1 8 freely respectively.

  In addition, the control device 27 arranges the yarn feed speed of the rollers arranged on the downstream side in the yarn running direction among the heat fixing godet rollers 16 to 18 adjacent in the yarn running direction on the upstream side in the yarn running direction. The thread feed speed of the rolled roller should be less than Accordingly, the yarn Y stretched between the godet rollers 15 and 16 contracts by being relaxed by the three godet rollers 16 to 18 for heat setting, and thus a yarn Y having a small boiling water contraction rate can be obtained.

Furthermore, in the present embodiment, the control device 27, among the three godet rollers 16 to 18 for heat, the rate of deceleration of the yarn feed speed of the yarn traveling direction most upstream of the godet roller 16 and the yarn traveling direction downstream of the godet roller 18 Is 2% or more. As described above, the deceleration rate of the yarn feed speed between the most upstream godet roller 16 and the most downstream godet roller 18 in the yarn traveling direction (total deceleration rate of the three godet rollers 16 to 18) is as large as 2% or more. By doing so, the yarn Y is heat-fixed in the three godet rollers 16 to 18 while being sufficiently relaxed. Accordingly, it is possible to obtain the yarn Y having a low boiling water shrinkage rate while keeping the surface temperature of the godet rollers 16 to 18 low.

  Moreover, the spinning drawing apparatus 2 of this embodiment can change suitably the deceleration rate between the godet rollers 16-18 according to a desired boiling-water shrinkage rate. For example, when producing a yarn Y having a low boiling water shrinkage rate, the total deceleration rate of the yarn feed speed between the heat fixing godet rollers 16 to 18 is increased by an input setting from a setting unit (not shown). On the other hand, when producing a yarn Y having a large boiling water shrinkage rate, the total reduction rate of the yarn feed speed between the heat fixing godet rollers 16 to 18 is reduced by setting the input from the setting unit. In detail, according to the information input from the setting unit, the control device 27 controls drive motors (not shown) provided on the godet rollers 16 to 18 and individually adjusts the yarn feed speeds of the godet rollers 16 to 18. The deceleration rate of the yarn feed speed between the godet rollers 16 to 18 is appropriately changed.

  Further, regarding the roller surface temperatures of the godet rollers 16-18, the control device 27 can individually adjust the temperatures of the godet rollers 16-18 by controlling a heater (not shown). That is, the control device 27 can easily obtain the yarn Y having a desired boiling water shrinkage rate by controlling the yarn feed speed and the roller surface temperature for each of the three godet rollers 16 to 18.

  On the other hand, if the rate of deceleration of the yarn feed speed is too large between two godet rollers adjacent in the yarn traveling direction, the yarn Y becomes slack and the yarn path becomes unstable. When the yarn path becomes unstable, the yarn may be wound around the roller. In this regard, in the present embodiment, the reduction rate of the yarn feed speed is less than 5% between the two heat setting godet rollers 16 and 17 and the godet rollers 17 and 18 adjacent in the yarn traveling direction. Therefore, the yarn path is prevented from becoming unstable due to the slack of the yarn Y due to the deceleration of the downstream godet roller relative to the upstream godet roller. Thereby, winding of the yarn Y around the heat fixing godet rollers 16 to 18, yarn breakage, and the like are suppressed.

  In this embodiment, the number of heat setting godet rollers is three, and there are two traveling sections of the yarn Y between the three godet rollers 16-18. In the present embodiment, the deceleration rate of the yarn feed speed is set to 1% or more in each of the two traveling sections. That is, the total deceleration rate is increased by appropriately increasing the deceleration rates of the two sections instead of particularly increasing the deceleration rates of some sections. Thereby, the thread | yarn with a low boiling-water shrinkage rate can be obtained, suppressing the surface temperature of the godet rollers 16-18 for heat setting low.

  Further, by increasing the deceleration rate between two adjacent heat setting godet rollers to 1% or more, the number of heat fixing godet rollers to reduce the number of heat fixing godet rollers (for example, 3%) is reduced. Can) Thereby, equipment cost can be reduced.

  Furthermore, in the two yarn traveling sections between the three godet rollers 16 to 18, the rate of reduction of the yarn feed speed between two godet rollers adjacent in the yarn traveling direction is the same. Thereby, the total deceleration rate can be maximized while equalizing the deceleration rates in the plurality of sections. Therefore, it is possible to obtain a yarn having a low boiling water shrinkage rate while keeping the surface temperature of the plurality of second rollers low.

(Details of specific examples)
Next, a specific example is given and demonstrated about the deceleration rate of the godet roller for heat setting, and the boiling water shrinkage rate of the yarn produced. In the following example, the yarn to be produced is nylon (PA6: 78 dtex / 24f). The number of heat fixing godet rollers is three, and the yarn feed speeds of these three heat fixing godet rollers can be individually changed. In the following example, the surface temperature of the rollers is the same among the three heat fixing godet rollers. Based on this premise, the shrinkage rate of the yarn can be obtained by changing the yarn feed speed and roller surface temperature of the three heat fixing godet rollers.

  4A is a table showing the relationship between the temperature of the heat fixing godet roller and the boiling water shrinkage rate when the heat fixing godet roller is not decelerated. FIG. (B) is a table | surface which shows the relationship between the deceleration rate of a heat setting godet roller, and a boiling water shrinkage | contraction rate when the temperature of the heat fixing godet roller is fixed at 160 degreeC. (C) is a table | surface which shows the example of conditions of roller temperature and the deceleration rate in the case of producing the thread | yarn whose boiling water shrinkage rate is 11%. In FIG. 4, “A / B” is described in the column of “Deceleration rate between adjacent rollers”. Here, “A” indicates two yarn traveling sections between three heat fixing godet rollers. Of these, the deceleration rate in the first half section is shown, and “B” shows the deceleration rate in the second half section. FIG. 5 (a) is a graph showing the relationship between the surface temperature of the heat fixing godet roller and the boiling water shrinkage obtained by plotting the table data of FIG. 4 (a). FIG. 5B is a graph showing the relationship between the deceleration rate and the boiling water shrinkage rate of the heat fixing godet roller obtained by plotting the table data of FIG.

  First, in order to produce a yarn having a low boiling water shrinkage without changing the yarn feed speed of the heat fixing godet roller (total deceleration rate is 0), as shown in FIGS. 4 (a) and 5 (a). In addition, the temperature of the heat fixing godet roller needs to be considerably increased. For example, as in Comparative Example 5, if the yarn has a boiling water shrinkage of 12%, the roller temperature may be 150 ° C. However, a yarn Y having a boiling water shrinkage of 1% and a boiling water shrinkage of 11% may be used. When producing, as in Comparative Example 2, it is necessary to raise the roller temperature by 30 ° C. and maintain it at 180 ° C.

  On the other hand, by applying the present invention and reducing the yarn feed speed of the heat fixing godet roller, a yarn having a low boiling water shrinkage can be produced without increasing the roller temperature. As shown in FIGS. 4 (b) and 5 (b), even if the roller surface temperature is 160 ° C., the total deceleration rate of the heat fixing godet roller should be 2% or more as in Examples 1-3. Thus, a yarn having a boiling water shrinkage of about 11% can be produced.

  On the other hand, in order to produce a yarn having a boiling water shrinkage of 11%, examination was also made as to what conditions should be used for the roller temperature and the deceleration rate. As mentioned earlier, as shown in FIG. 4C, in order to produce a yarn having a boiling water shrinkage of 11% when the yarn feed speed of the heat fixing godet roller is not reduced (total reduction rate is 0). As in Comparative Example 2, it is necessary to raise the roller temperature to 180 ° C. On the other hand, in Examples 4 to 9 in which the yarn feeding speed is reduced, a yarn having a boiling water shrinkage of 11% can be produced under the condition that the roller temperature is lower than that in Comparative Example 2. Further, as clearly understood from FIG. 4 (c), the larger the total deceleration rate of the heat fixing godet roller, the lower the roller temperature even when producing yarns having the same boiling water shrinkage rate.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments and examples, and various design changes can be made as long as they are described in the claims. is there.

  In the present embodiment, it has been described that the rate of reduction of the yarn feed speed of the heat fixing godet roller is the same between the godet rollers 16 and 17 and the godet rollers 17 and 18, but the maximum rate of reduction of the yarn feed rate is 5 If it is less than%, the speed reduction rate of the yarn feed speed is different between the godet rollers 16 and 17 and the godet rollers 17 and 18 as in some embodiments shown in FIG. It does not matter.

  In addition, as long as the total deceleration rate is equal, the deceleration rate between two adjacent heat fixing godet rollers may be distributed in any way.

  In the present embodiment, the surface temperatures of the heat fixing godet rollers 16 to 18 are described as being substantially equal. However, the surface temperatures of the godet rollers 16 to 18 may be different from each other. Specifically, for example, the godet rollers 18, 17, and 16 are set so that the surface temperature becomes higher, that is, the godet roller 16 arranged at the most upstream of the heat setting godet rollers has the highest surface temperature. It doesn't matter.

  Further, in the present embodiment, it is described that the heat fixing godet rollers 16 to 18 are three in total. However, if the yarn Y has the minimum number necessary for heat fixing, the heat fixing is performed. The number of godet rollers for use may be any number as long as it is two or more.

  Further, in the present embodiment, it is described that there are a total of two preheating godet rollers 14 and 15. However, if the yarn Y has the minimum number necessary for preheating, the preheating is performed. Any number of godet rollers may be used.

  In the present embodiment, the preheating godet rollers 14 and 15 on which a plurality of yarns Y before stretching travel are described as heating rollers. However, the yarn Y is nylon or the like, and the glass transition temperature is a resin near normal temperature. In this case, since preheating is not necessarily required, all or a part of the preheating godet rollers 14 and 15 may be non-heating rollers without a heater. Further, when the preheating godet rollers 14 and 15 are provided with a heater, the heater may be turned off, and all or a part thereof may be used in a non-heated state.

  In the present embodiment, the diameters of the plurality of godet rollers 14 to 18 are in the range of 220 to 300 mm, and are arranged in a staggered manner from the bottom to the top in the order of the godet rollers 14, 15, 16, 17, and 18. However, the diameter, arrangement, yarn winding angle, etc. of the godet rollers 14-18 may be appropriately changed according to the type of yarn Y to be produced, the heating temperature of the yarn Y, and the like.

DESCRIPTION OF SYMBOLS 1 Spinning take-up machine 2 Spinning drawing apparatus 3 Yarn winding apparatus 4 Spinning apparatuses 14 and 15 Godet rollers 16 to 18 for preheating Heating Godet roller 27 for heat setting Controller

Claims (4)

A plurality of rollers arranged along the yarn path for drawing the yarn spun from the spinning device, and a speed control unit for controlling the yarn feed speeds of the plurality of rollers,
Each of the plurality of rollers is wound with the yarn at a winding angle of less than 270 degrees.
The plurality of rollers are heating rollers in which at least one first roller and the yarn fed from the first roller are one-sided and each has a yarn feeding speed higher than the yarn feeding speed of the first roller. A plurality of second rollers, and
A spinning and stretching method in a spinning and stretching apparatus further comprising a temperature control unit that controls the temperature of each of the plurality of second rollers ,
The speed controller,
Of the two adjacent second rollers, the yarn feed speed of the roller disposed on the downstream side in the yarn traveling direction is set to be equal to or lower than the yarn feed speed of the roller disposed on the upstream side in the yarn traveling direction,
Among the plurality of second rollers, control is performed so that a deceleration rate of the yarn feeding speed of the second roller in the most upstream direction in the yarn traveling direction and the second roller in the most downstream direction in the yarn traveling direction is 2% or more ,
As boiling water shrinkage percentage of the obtained yarn becomes a desired value, respectively to control the yarn feeding speed of the plurality of second rollers to the speed controller Rutotomoni, of the plurality of second roller to the temperature control unit spinning stretching method, wherein Rukoto respectively to control the temperature. The speed controller,
In between two of said second roller adjacent in the yarn traveling direction, the spinning stretching method according to claim 1, wherein the deceleration rate of the yarn feed velocity, and wherein the Rukoto to control to less than 5%. There are three or more second rollers,
The speed control unit, between two of said second roller adjacent in the yarn traveling direction, according to claim 1 or 2, characterized in Rukoto to the control of the deceleration rate of the yarn feed speed all 1% or more Spinning method . There are three or more second rollers,
Said speed control section, the two adjacent yarn traveling direction between the second roller deceleration rate of the yarn feeding speed, according to claim 3, characterized in Rukoto to the control of the same for a plurality of sections Spinning drawing method .

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