EP3095900A1 - Combined yarn producing device - Google Patents
Combined yarn producing device Download PDFInfo
- Publication number
- EP3095900A1 EP3095900A1 EP16168913.8A EP16168913A EP3095900A1 EP 3095900 A1 EP3095900 A1 EP 3095900A1 EP 16168913 A EP16168913 A EP 16168913A EP 3095900 A1 EP3095900 A1 EP 3095900A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- roller
- drawing roller
- yarns
- rollers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
- D02J1/225—Mechanical characteristics of stretching apparatus
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
Definitions
- the present invention relates to a combined yarn producing device which is configured to produce a combined yarn by combining two types of yarns.
- a combined yarn formed by combining two types of yarns which are different in physical properties or the like has been known.
- a representative example of such a combined yarn is a differential-shrinkage combined yarn produced by combining two types of yarns which are different in thermal shrinkage.
- a typical differential-shrinkage combined yarn is produced by combining, by air interlacing or the like, a thermally-treated yarn which is thermally treated (thermally set) after drawn and a non-thermally-treated yarn which is not thermally set after drawn.
- differential-shrinkage combined yarns are produced by combining thermally-treated yarns and non-thermally-treated yarns which are produced independently. Later on, a technology of producing differential-shrinkage combined yarns simultaneously with drawing by using a drawing machine configured to draw material yarns such as undrawn yarns (UDY) and partially oriented yarns (POY) was developed (see, e.g., PTL 1 (Japanese Unexamined Patent Publication No. 57-193543 )).
- FIG. 8 shows an example of a known device for producing differential-shrinkage combined yarns.
- This device 100 is provided with a first roller 101 which is a heating roller, a second roller 102 which is a non-heating roller, a heater 103 provided between the first roller 101 and the second roller 102, a guide 104 provided to bypass the heater 103, and a combining section 105.
- a differential-shrinkage combined yarn is produced by this device, to begin with, two packages Pa and Pb on each of which a material yarn such as the undrawn yarn (UDY) and the partially oriented yarn (POY) is wound are prepared.
- the yarn Ya on one package Pa is arranged to run a yarn path which connects the first roller 101 with the second roller 102 via the heater 103.
- the yarn Ya is heated to a drawable temperature at the first roller 101, and is then drawn between the first roller 101 and the second roller 102.
- the yarn Ya is thermally treated by the heater 103.
- the yarn Yb on the other package Pb is arranged to run on a yarn path which connects the first roller 101 with the second roller 102 via the guide 104.
- the yarn Yb is heated to a drawable temperature at the first roller 101, and is then drawn between the first roller 101 and the second roller 102. Being different from the yarn Ya, the yarn Yb is not thermally treated during the drawing.
- the yarn Ya thermally treated after drawn becomes a low-shrinkage yarn with low thermal shrinkage
- the non-thermally-treated yarn Yb becomes a high-shrinkage yarn with high thermal shrinkage.
- packages of material yarns such as UDY and POY are prepared in advance, and two types of yarns different in thermal shrinkage are produced from the material yarns.
- a combined yarn is produced through at least two steps including a step of producing the packages of the material yarns and a step of producing the two types of yarns from the packages and combining the yarns, and this requires a lot of labor and cost.
- An object of the present invention is to provide a combined yarn producing device capable of serially performing processes from spinning to production of a combined yarn.
- a combined yarn producing device includes: a yarn feed roller configured to feed yarns spun out from a spinning apparatus; a first drawing roller on which a first yarn among the yarns fed from the yarn feed roller is wound, the first drawing roller being configured to be higher in yarn feeding speed than the yarn feed roller and to heat and feed the first yarn drawn between the yarn feed roller and the first drawing roller; a second drawing roller on which a second yarn among the yarns fed from the yarn feed roller is wound, the second drawing roller being configured to be higher in yarn feeding speed than the yarn feed roller, to be lower in roller surface temperature than the first drawing roller, and to feed the second yarn drawn between the yarn feed roller and the second drawing roller; and a combining section configured to combine the first yarn fed from the first drawing roller and the second yarn fed from the second drawing roller.
- the combined yarn producing device of the present invention includes the yarn feed roller configured to feed the yarns spun out from the spinning apparatus 2 and the two drawing rollers which are higher in the yarn feeding speed than the yarn feed roller.
- the first yarn is drawn between the yarn feed roller and the first drawing roller whereas the second yarn is drawn between the yarn feed roller and the second drawing roller.
- the second drawing roller is lower in the roller surface temperature than the first drawing roller.
- the first yarn drawn by the first drawing roller is heated by a higher temperature than the second yarn is.
- the first yarn and the second yarn after drawn are therefore different in physical properties such as thermal shrinkage. Thereafter, the first yarn and the second yarn are combined in the combining section and a combined yarn is produced.
- two types of yarns which are different in physical properties are produced from yarns spun out from the spinning apparatus, and processes until the combination of the two types of the yarns are serially performed.
- processes from the spinning to the production of the combined yarn are serially performed, labor and cost are significantly reduced as compared to known arrangements.
- the combined yarn producing device of the first aspect is arranged such that the first drawing roller is a heating roller heating the first yarn wound onto a surface of the heating roller, and the second drawing roller is a non-heating roller not heating the second yarn wound onto a surface of the non-heating roller.
- the first yarn drawn between the yarn feed roller and the first drawing roller is heated by the first drawing roller which is a heating roller.
- the second yarn drawn between the yarn feed roller and the second drawing roller is wound onto the second drawing roller which is a non-heating roller, and hence the second yarn is not heated by the second drawing roller.
- the combined yarn producing device of the first or second aspect is arranged such that the yarn feeding speed of the first drawing roller is higher than the yarn feeding speed of the second drawing roller.
- the first yarn which is heated at a high temperature by the first drawing roller after drawn is a rigid yarn as compared to the second yarn.
- a difference in the rigidity is one of reasons why the two types of yarns are not easily interlaced at the combining section.
- the yarn feeding speed of the first drawing roller is higher than that of the second drawing roller, there is a difference in the yarn tension at the time of the combination, and hence the tension of the first yarn is lower than that of the second yarn. With this, the rigid first yarn becomes easily bendable, and the interlacing of the first yarn and the second yarn in the combining section is facilitated.
- the difference in the tension between the first yarn and the second yarn at the time of the combination is preferably not excessively large.
- a difference between the yarn feeding speed of the first drawing roller and the yarn feeding speed of the second drawing roller preferably falls within the range of 0.25% to 2.5% of the yarn feeding speed of the first drawing roller (the fourth aspect of the invention).
- the combined yarn producing device of any one of the first to fourth aspects is arranged such that the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, and the second yarn is wound onto the second drawing roller at a winding angle of less than 360 degrees.
- the winding angles of the first yarn and the second yarn on the drawing roller are both less than 360 degrees. In other words each yarn is wound not more than once on each drawing roller, and hence the yarn placement on each drawing roller is easily done.
- the combined yarn producing device of any one of the first to fourth aspects is arranged such that the first drawing roller and the second drawing roller extend in a predetermined direction, the first yarn before wound onto the first drawing roller and the second yarn before wound onto the second drawing roller run side by side in the predetermined direction, the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, a separate roller is provided in the vicinity of the second drawing roller, and the second yarn is wound at least once between the second drawing roller and the separate roller.
- the second drawing roller does not heat a yarn to a high temperature and hence this roller can be short in diameter.
- the contact length with the second yarn is short and the gripping force is low.
- the second yarn is wound at least once between the second drawing roller and the separate roller. The contact length between the second drawing roller and the second yarn is therefore long and the gripping force is increased, with the result that the second yarn is less likely to slip.
- the first yarn and the second yarn are lined up in the roller axial direction.
- the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, and hence the yarn path of the first yarn after wound onto the first drawing roller is unlikely to be shifted from the yarn path of the first yarn before wound onto the first drawing roller.
- the second yarn is wound between the second drawing roller and the separate roller at least once, and hence the yarn path of the second yarn after wound onto the second drawing roller is shifted from the yarn path of the second yarn before wound onto the second drawing roller. This makes it possible to cause the yarn path of the first yarn fed by the first drawing roller and the yarn path of the second yarn fed by the second drawing roller to converge, immediately before reaching the combining section.
- FIG. 1 is a front elevation of a spun yarn take-up apparatus of the present embodiment.
- the up-down direction and the left-right direction shown in FIG. 1 will be used as the up-down direction and the left-right direction of the spun yarn take-up apparatus.
- the direction orthogonal to the plane of FIG. 1 will be used as the front-back direction of the spun yarn take-up apparatus.
- the direction away from the plane of FIG. 1 toward the viewer is the frontward direction.
- the spun yarn take-up apparatus 1 is provided with members such as a combined yarn producing device 3, a winding device 4, and a controller 5.
- spinnerets 7 (7a and 7b) of a spinning apparatus 2 are provided above the spun yarn take-up apparatus 1.
- FIG. 1 shows only two spinnerets 7, in reality plural spinnerets 7 are provided to be lined up along the left-right direction.
- yarns Y (Y1 and Y2) made of synthetic fibers (e.g., polyester fibers) are spun out, respectively.
- an oil guide 8 is provided below each spinneret 7, to apply oil to the spun-out yarns Y.
- the combined yarn producing device 3 is provided with rollers 10 to 19 configured to take up the yarns Y on which the oil has been applied. While the rollers 10 to 19 take up the yarns Y, the combined yarn producing device 3 draws and thermally treats the yarns Y to produce two yarns Y1 and Y2 which are different in physical properties. Furthermore, a single combined yarn Ym is produced by combining the two yarns Y1 and Y2. The structure of the combined yarn producing device 3 will be detailed later.
- the winding device 4 is configured to wind combined yarns Ym respectively produced by the combined yarn producing devices 3.
- the winding device 4 includes members such as a bobbin holder 21 and a contact roller 22.
- the bobbin holder 21 is long in the front-back direction (i.e., the direction orthogonal to the plane of FIG. 1 ) in shape, and is rotationally driven by an unillustrated motor.
- bobbins 23 are attached to be lined up along the longitudinal direction of the bobbin holder 21.
- the winding device 4 rotates the bobbin holder 21 so as to wind the combined yarns Ym onto the respective bobbins 23, with the result that packages 24 are formed.
- the contact roller 22 adjusts the shape of each package 24 by making contact with the surface of each package 24 and applying predetermined contact pressure thereto.
- the controller 5 is provided with a setting unit 25 for setting control parameters of various actions of the spun yarn take-up apparatus 1. Based on the parameters set by an operator through the setting unit 25, the controller 5 controls the sections of the combined yarn producing device 3 and the winding device 4. For example, the controller 5 controls the speed of a motor (not illustrated) by which the rollers 10 to 19 of the combined yarn producing device 3 are driven and the temperature of a heater 30 provide in each of the rollers 11 to 15.
- a motor not illustrated
- the combined yarn producing device 3 includes a roller 10, a heat retaining box 20, preheating rollers 11, 12, and 13 (yarn feed rollers of the present invention), first drawing rollers 14 and 15, a second drawing roller 16, rollers 17, 18, and 19, and an interlacing device 26.
- the rollers 10 to 19 are disposed so that the axial direction of each roller is along the front-back direction.
- the axial direction may not be in parallel to the front-back direction in at least one of the rollers 10 to 19.
- the axial direction of at least one of the rollers may be slightly deviated upward or downward relative to the front-back direction.
- the rollers 18 and 19 may be disposed so that the axial direction of each roller is along the left-right direction.
- the yarns Y spun out from the spinning apparatus 2 are fed by the rollers 10 to 19 and run side by side in the front-back direction.
- roller 10 Onto the roller 10, plural (e.g., eight) yarns Y spun out from the spinnerets 7 of the spinning apparatus 2 are wound to be side by side in the axial direction of the roller 10 (i.e., the direction orthogonal to the plane of FIG. 1 ).
- the roller 10 is driven by an unillustrated motor, and takes up the yarns Y spun out from the spinning apparatus 2 and sends the yarns Y to the heat retaining box 20.
- FIG. 2 is a perspective view of the heat retaining box 20, the preheating rollers 11 to 13, the first drawing rollers 14 and 15, and the second drawing roller 16.
- the heat retaining box 20 is made of a heat insulating material. Through a right wall member of this heat retaining box 20, a yarn inlet 20a, a first yarn outlet 20b, and a second yarn outlet 20c are formed.
- the yarn inlet 20a is formed at a lower end portion of the right wall member of the heat retaining box 20.
- the first yarn outlet 20b is formed at an upper end portion of the right wall member of the heat retaining box 20, whereas the second yarn outlet 20c is formed at a central portion in the up-down direction of the right wall member.
- the yarns Y sent from the roller 10 are introduced into the heat retaining box 20 through the yarn inlet 20a.
- five heating rollers in total i.e., three preheating rollers 11 to 13 and two first drawing rollers 14 and 15 are housed.
- the three preheating rollers 11 to 13 are provided in a lower space in the heat retaining box 20, whereas the two first drawing rollers 14 and 15 are provided in an upper space in the heat retaining box 20.
- the five heating rollers are each rotationally driven by an unillustrated motor.
- the yarn feeding speeds of the three preheating rollers 11 to 13 are V1, V2, and V3, respectively.
- the relationship between the yarn feeding speeds of the three preheating rollers 11 to 13 is V1 ⁇ V2 ⁇ V3. In this way, the running speed of the yarns Y is gradually increased across the three preheating rollers 11 to 13.
- the yarn feeding speeds of the two first drawing rollers 14 and 15 are V4 and V5, respectively, and V4 is substantially equal to V5.
- the yarn feeding speeds V4 and V5 of the two first drawing rollers 14 and 15 are higher than the yarn feeding speeds V1 to V3 of the three preheating rollers 11 to 13.
- the heater 30 is provided in each of the five heating rollers (the three preheating rollers 11 to 13 and the two first drawing rollers 14 and 15).
- the yarns Y wound onto each heating roller are heated on the surface of the roller which is maintained at a predetermined temperature by the heater 30.
- the three preheating rollers 11 to 13 are heating rollers for heating the yarns Y to a drawable temperature.
- the roller surface temperatures of the three preheating rollers 11, 12, and 13 are T1, T2, and T3, respectively.
- the roller surface temperature T3 of the preheating roller 13 is arranged to be equal to or higher than a glass transition temperature (e.g., 80 to 95 degrees centigrade in cases of polyester fibers).
- the relationship between the temperatures of the three preheating rollers 11 to 13 is arranged to be T1>T2>T3.
- a temperature difference between two neighboring preheating rollers is, for example, about 5 degrees centigrade.
- the two first drawing rollers 14 and 15 are heating rollers for heating the drawn yarns Y and fixing the drawn state.
- thermal treatment performed for drawn yarns may be referred to as "thermal setting”.
- the roller surface temperatures of the two first drawing rollers 14 and 15 are T4 and T5, respectively.
- T4 and T5 may be equal to each other or different from each other.
- T4 and T5 are arranged to be higher than T3 (e.g., arranged to be 120 to 150 degrees centigrade).
- the second drawing roller 16 is provided outside the heat retaining box 20 and to the right of the second yarn outlet 20c. This second drawing roller 16 is driven by an unillustrated roller.
- the yarn feeding speed V6 of the second drawing roller 16 is higher than the yarn feeding speeds V1 to V3 of the preheating rollers 11 to 13.
- the yarn feeding speeds V4 and V5 of the first drawing rollers 14 and 15 are arranged to be higher than the yarn feeding speed V6 of the second drawing roller 16. The reason of this arrangement will be given later.
- the second drawing roller 16 is not provided with a heater.
- the second drawing roller 16 is a non-heating roller which does not heat yarns wound thereon.
- the roller surface temperature T6 of the second drawing roller 16 is substantially equal to an environmental temperature (e.g., 40 degrees centigrade), and is significantly lower than the roller surface temperatures T4 and T5 of the two first drawing rollers 14 and 15.
- the yarns Y spun out from the spinning apparatus 2 and taken up by the roller 10 are introduced into the heat retaining box 20 through the yarn inlet 20a, and are wound onto the three preheating rollers 11 to 13 one by one. Thereafter, the yarns Y are divided into two groups in the heat retaining box 20, and the two groups of the yarns Y go out from the heat retaining box 20 through the two yarn outlets 20b and 20c, respectively.
- a yarn Y1 (a first yarn of the present invention) spun out from the left spinneret 7a in FIG. 1 will be described.
- the yarn Y1 introduced into the heat retaining box 20 through the yarn inlet 20a is wound onto the front parts of the three preheating rollers 11 to 13, and are preliminarily heated to the drawable temperature by the lower three preheating rollers 11 to 13.
- the preliminarily-heated yarn Y1 is then wound onto the upper two first drawing rollers 14 and 15.
- the yarn Y1 is drawn by the difference in the yarn feeding speed between the preheating roller 13 and the first drawing roller 14.
- the yarn Y1 is heated to a higher temperature while being fed by the upper two first drawing rollers 14 and 15, with the result that the drawn state is thermally set.
- the thermally-set yarn Y1 goes out from the heat retaining box 20 through the first yarn outlet 20b.
- a yarn Y2 (a second yarn of the present invention) spun out from the right spinneret 7b in FIG. 1 will be described.
- the yarn Y2 introduced into the heat retaining box 20 through the yarn inlet 20a is wound onto the back parts of the three preheating rollers 11 to 13, and is preliminarily heated to a drawable temperature by the preheating rollers 11 to 13. Until this stage, the yarn Y2 is treated in the same manner as the yarn Y1. However, the yarn Y2 is not wound onto the upper two first drawing rollers 14 and 15, and goes out from the heat retaining box 20 through the second yarn outlet 20c.
- the yarn Y2 from the second yarn outlet 20c is wound onto the second drawing roller 16.
- the yarn Y2 is drawn due to the difference in the yarn feeding speed between the preheating roller 13 and the second drawing roller 16.
- the second drawing roller 16 is a non-heating roller not including a heater.
- the yarn Y2 drawn between the preheating roller 13 and the second drawing roller 16 is not thermally set after drawn.
- the two yarns Y1 and Y2 are different from each other in physical properties such as thermal shrinkage.
- the yarn Y2 which is not thermally set after drawn has higher thermal shrinkage than the yarn Y1 which is thermally set.
- the thermally-set yarn Y1 is a low-shrinkage yarn with low thermal shrinkage
- the non-thermally-set yarn Y2 is a high-shrinkage yarn with high thermal shrinkage.
- the thermal shrinkage (boiling water shrinkage) of the yarn Y1 is, for example, 5 to 10%
- the thermal shrinkage of the yarn Y2 is, for example, 10 to 20%.
- the yarn Y1 on the front side is wound at a winding angle of less than 360 degrees onto each of the three preheating rollers 11 to 13 and the two first drawing rollers 14 and 15.
- the yarn Y2 on the back side is wound at a winding angle of less than 360 degrees onto each of the three preheating rollers 11 to 13 and the second drawing roller 16.
- the yarn placement of the yarn Y2 is performed first and then the yarn placement of the yarn Y1 is performed.
- the yarn Y1 may run on the back side whereas the yarn Y2 may run on the front side. In such a case, the yarn placement of the yarn Y1 is performed first.
- the yarn paths of the yarn Y1 and Y2 after the yarns Y1 and Y2 are wound onto each roller are not deviated from the yarn paths before the yarns Y1 and Y2 are wound onto each roller, and hence the yarn Y1 and the yarn Y2 run side by side in the front-back direction.
- the yarn paths of the yarn Y1 and the yarn Y2 naturally converge when the yarn path of the yarn Y2 is shifted by slightly tilting the roller axial direction of the second drawing roller 16 relative to the front-back direction.
- the yarn Y1 coming from the heat retaining box 20 through the first yarn outlet 20b and the yarn Y2 coming through the second yarn outlet 20c and sent to the second drawing roller 16 are both wound onto the rollers 17 and 18.
- the interlacing device 26 (a combining section of the present invention) configured to interlace the two types of the yarns Y1 and Y2 is provided.
- a nonlimiting example of the interlacing device 26 is a device having an interlace nozzle which is configured to blow air in the direction orthogonal to the running direction of the yarns Y to interlace filaments.
- the interlacing device 26 has four interlace nozzles. In each interlace nozzle, one yarn Y1 and one yarn Y2 are inserted.
- each nozzle filaments constituting the two yarns Y1 and Y2 are interlaced by the airflow.
- four combined yarns Ym are produced by the interlacing device 26.
- the combined yarns Ym produced by the interlacing device 26 are sent to the winding device 4 by the roller 19, and are wound onto the respective bobbins 23 by the winding device 4.
- the yarn feeding speeds of the rollers including the preheating rollers 11 to 13, the first drawing rollers 14 and 15, and the second drawing roller 16 and the temperatures of the heaters 30 in the five heating rollers 11 to 15 are set by an operator through the setting unit 25.
- the controller 5 controls the rotation speeds of the motors driving the rollers and the heating temperatures of the heaters 30.
- the yarn Y1 is thermally set after drawn whereas the yarn Y2 is not thermally set after drawn, so that two types of yarns Y1 and Y2 which are different in physical properties are produced. Then processes are serially performed until the two types of the yarns Y1 and Y2 are combined. In this way, because the processes from the spinning to the production of the combined yarn Ym are serially performed, labor and cost are significantly reduced as compared to known arrangements.
- the second drawing roller 16 on which the yarn Y2 is wound is not a roller which heats and thermally sets a yarn.
- the contact length of the yarn Y2 on the roller is not required to be long.
- the second drawing roller 16 is therefore only required to be a roller which is large enough to obtain gripping force with which the yarn Y2 is not slipped, and can be shorter in diameter than the first drawing rollers 14 and 15.
- the second drawing roller 16 is additionally provided in the spun yarn take-up apparatus 1 of the present embodiment.
- the apparatus is not very large as compared to the known apparatuses because the diameter of the second drawing roller 16 can be short.
- the yarn Y1 which is thermally set at a high temperature is a rigid yarn as compared to the yarn Y2 which is not thermally set.
- Such a difference in the rigidity is one of reasons why the two types of the yarns Y1 and Y2 are not easily interlaced at the interlacing device 26.
- the yarn feeding speeds V4 and V5 of the first drawing rollers 14 and 15 are higher than the yarn feeding speed V6 of the second drawing roller 16
- the yarns Y1 and Y2 are different in the yarn tension at the time of the combination, and the tension of the yarn Y1 is lower than the tension of the yarn Y2.
- the rigid yarn Y1 becomes easily bendable, and the interlacing of the two types of the yarns Y1 and Y 2 in the interlacing device 26 is facilitated.
- the difference in the yarn tension between the two types of the yarns Y1 and Y2 at the time of the combination is preferably not excessively large.
- the difference in the speed between the first drawing rollers 14 and 15 and the second drawing roller 16 is preferably 0.25% to 2.5% of the yarn feeding speeds V4 and V5 of the first drawing rollers 14 and 15.
- the spun yarn take-up apparatus of the present embodiment can be used not only for producing the combined yarn Ym by combining the two types of the yarns Y1 and Y2 but also for producing only one type of yarns.
- all of the yarns Y spun out from the spinnerets 7 of the spinning apparatus 2 are wound onto the two first drawing rollers 14 and 15, and no yarn Y is wound onto the second drawing roller 16.
- all of the yarns Y are thermally set after drawn, so that only the yarns with low thermal shrinkage are produced.
- all of the yarns Y spun out from the spinnerets 7 are wound onto the second drawing roller 16 and all of the yarns Y are not thermally set after drawn, only yarns with high thermal shrinkage are produced.
- the yarn thickness (e.g., thickness of each filament and/or the number of filaments) may be different.
- the yarn Y1 which is a low-shrinkage yarn is on the outer side and functions as a sheath yarn
- the yarn Y2 which is a high-shrinkage yarn is on the inner side and functions as a core yarn.
- the yarn Y1 which functions as the sheath yarn is narrow whereas the yarn Y2 which functions as the core yarn is thick, a yarn which is tense and stiff but is gentle in touch is obtained, and such an arrangement is preferred in terms of the texture.
- the arrangements (the size of holes spinning out filaments or the number of the holes) of the spinnerets 7 producing the respective yarns are differentiated, or the amounts of discharged polymer are differentiated.
- the second drawing roller 16 on which the yarn Y2 is wound is a non-heating roller not including a heater
- the second drawing roller 16 may be a heating roller including a heater 31 as shown in FIG. 3 .
- the controller 5 controls the heater 31 so that the roller surface temperature of the second drawing roller 16 is lower than the roller surface temperatures of the first drawing rollers 14 and 15.
- the heater 31 of the second drawing roller 16 may be turned on or off by the controller 5 in consideration of the type of the yarn to be produced.
- the separate roller 33 may be provided in the vicinity of the second drawing roller 16, and the yarn Y2 may be wound at least once between the second drawing roller 16 and the separate roller 33.
- the second drawing roller 16 can be arranged to be shorter in diameter than the first drawing rollers 14 and 15 which thermally set the yarn Y1 after drawn.
- the diameter of the second drawing roller 16 is short, the contact length with the yarn Y2 is short and the gripping force is low.
- the contact length between the second drawing roller 16 and the yarn Y2 is long and the gripping force is increased, with the result that the yarn Y2 is less likely to slip. Because a main objective of this arrangement is to increase the gripping force, the number of times of the winding of the yarn Y2 is not required to be large, and once or twice is sufficient.
- the yarn Y1 before wound onto the first drawing rollers 14 and 15 and the yarn Y2 before wound onto the second drawing roller 16 run side by side in the front-back direction (see FIG. 2 ).
- the yarn Y1 on the front side is wound onto the winding angle of less than 360 degrees onto the first drawing rollers 14 and 15, and hence the yarn path of the yarn Y1 after wound onto the first drawing rollers 14 and 15 is not shifted from the yarn path of the yarn Y1 before wound onto the first drawing rollers 14 and 15.
- the yarn Y2 on the back side is wound at least once between the second drawing roller 16 and the separate roller 33, and hence the yarn path of the yarn Y2 after wound onto the second drawing roller 16 is shifted frontward as compared to the yarn path of the yarn Y2 before wound onto the second drawing roller 16.
- the yarn paths of the yarn Y1 and the yarn Y2 are converged.
- the yarn path of the yarn Y2 is shifted in the direction away from the yarn Y1.
- the amount of the shifting is small, and hence it is not difficult to cause the yarn path of the yarn Y2 and the yarn path of the yarn Y1 to be converged.
- the yarn Y2 is wound more than twice, it becomes difficult to cause the yarn paths to be converged because of a large amount of the shifting from the yarn path of the yarn Y1.
- the yarn paths of the yarn Y1 and the yarn Y2 are easily converged when the yarn Y2 is wound once or twice.
- the diameter of the second drawing roller 16 may be determined so that required gripping force is obtained with the winding of the yarn Y2 once or twice.
- the yarn placement of the yarn Y2 on the back side is performed first, and the yarn Y2 is wound once or twice onto each of the second drawing roller 16 and the separate roller 33, from the back side to the front side. Thereafter, the yarn Y1 on the front side is placed.
- the yarn feed rollers (preheating rollers 11 to 13) feeding the yarns Y (both of the yarn Y1 and the yarn Y2) spun out from the spinning apparatus 2 are heating rollers.
- these yarn feed rollers may be non-heating rollers.
- the yarn feed rollers may be non-heating rollers.
- the numbers of the rollers and the layout of the rollers may be suitably changed.
- the second drawing roller 16 may be provided to the right of the roller 17. With this arrangement, the winding angle of the yarn Y2 on the second drawing roller 16 is large and hence the gripping force is increased.
- the second drawing roller 16 is provided in a space between the yarn path from the spinnerets 7 to the roller 10 and the yarn path between the roller 17 and the roller 18. This space, however, is small in reality, and hence yarn placement is not easy and must be carefully done. In this connection, such a problem does not occur in FIG. 5(a) , because the second drawing roller 16 is provided in a space to the right of the yarn path between the roller 17 and the roller 18.
- the yarn Y2 sent by the second drawing roller 16 may be directly sent to the roller 18 without being wound onto the roller 17.
- the yarn Y2 may be directly sent to the roller 18 without being wound onto the roller 17 in the same manner as in FIG. 5(b) , and may be wound at least once between the second drawing roller 16 and the separate roller 33.
- a spun yarn take-up apparatus 61 shown in FIG. 6 includes two preheating rollers 41 and 42 and two first drawing rollers 43 and 44 which are housed in a heat retaining box 40, and a second drawing roller 45 provided outside the heat retaining box 40.
- the two preheating rollers 41 and 42 are provided in an upper space in the heat retaining box 40, whereas the two first drawing rollers 43 and 44 are provided in a lower space in the heat retaining box 40.
- These four rollers 41 to 44 are heating rollers each including a heater 50.
- the second drawing roller 45 is a non-heating roller not including a heater, and is provided below the heat retaining box 40.
- the controller 5 controls the motors (not illustrated) and the heaters 50 for the two preheating rollers 41 and 42 and the two first drawing rollers 43 and 44 in the heat retaining box 40, respectively.
- the yarn feeding speeds V3 and V4 of the two first drawing rollers 43 and 44 are arranged to be higher than the yarn feeding speeds V1 and V2 of the two preheating rollers 41 and 42.
- the roller surface temperatures T3 and T4 of the two first drawing rollers 43 and 44 are arranged to be higher than the roller surface temperatures T1 and T2 of the two preheating rollers 41 and 42.
- the controller 5 controls the motor of the second drawing roller 45.
- the yarn feeding speed V5 of the second drawing roller 45 is arranged to be higher than the yarn feeding speeds V1 and V2 of the preheating rollers 41 and 42. Because the second drawing roller 45 is a non-heating roller, the roller surface temperature T5 of the second drawing roller 45 is lower than the roller surface temperatures T3 and T4 of the two first drawing rollers 43 and 44.
- the yarns Y spun out from the spinning apparatus 2 are introduced into the heat retaining box 40 through the yarn inlet 40a.
- the yarn Y1 among the yarns Y is, to begin with, wound onto the two preheating rollers 41 and 42, and is preliminarily heated to a drawable temperature while being fed by the two preheating rollers 41 and 42.
- the yarn Y1 is then wound onto the two first drawing rollers 43 and 44.
- the yarn Y1 is drawn between the rollers 42 and 43 which are different in the yarn feeding speed, and is thermally set by being heated to a high temperature by the two first drawing rollers 43 and 44. Thereafter, the yarn Y1 goes out from the heat retaining box 40 through the first yarn outlet 40b and is wound onto the roller 47.
- the yarn Y2 among the yarns is wound onto the two preheating rollers 41 and 42 and is preliminarily heated to a drawable temperature while being fed by the two preheating rollers 41 and 42.
- the yarn Y2 then goes out from the heat retaining box 40 through the second yarn outlet 40c and is wound onto the second drawing roller 45.
- the yarn Y2 is drawn between the rollers 42 and 45 which are different in the yarn feeding speed.
- the second drawing roller 45 is a non-heating roller, and hence the yarn Y2 is not thermally set after drawn.
- the yarn Y2 is fed by the rollers 46 and 47, and the yarn Y2 and the yarn Y1 are combined by the interlacing device 49 provided between the rollers 47 and 48.
- a combined yarn Ym produced by the combination is wound by the winding device 4.
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Abstract
Description
- The present invention relates to a combined yarn producing device which is configured to produce a combined yarn by combining two types of yarns.
- A combined yarn formed by combining two types of yarns which are different in physical properties or the like has been known. A representative example of such a combined yarn is a differential-shrinkage combined yarn produced by combining two types of yarns which are different in thermal shrinkage. A typical differential-shrinkage combined yarn is produced by combining, by air interlacing or the like, a thermally-treated yarn which is thermally treated (thermally set) after drawn and a non-thermally-treated yarn which is not thermally set after drawn.
- In early days, differential-shrinkage combined yarns are produced by combining thermally-treated yarns and non-thermally-treated yarns which are produced independently. Later on, a technology of producing differential-shrinkage combined yarns simultaneously with drawing by using a drawing machine configured to draw material yarns such as undrawn yarns (UDY) and partially oriented yarns (POY) was developed (see, e.g., PTL 1 (Japanese Unexamined Patent Publication No.
57-193543 FIG. 8 shows an example of a known device for producing differential-shrinkage combined yarns. Thisdevice 100 is provided with afirst roller 101 which is a heating roller, asecond roller 102 which is a non-heating roller, aheater 103 provided between thefirst roller 101 and thesecond roller 102, aguide 104 provided to bypass theheater 103, and a combiningsection 105. - When a differential-shrinkage combined yarn is produced by this device, to begin with, two packages Pa and Pb on each of which a material yarn such as the undrawn yarn (UDY) and the partially oriented yarn (POY) is wound are prepared. The yarn Ya on one package Pa is arranged to run a yarn path which connects the
first roller 101 with thesecond roller 102 via theheater 103. The yarn Ya is heated to a drawable temperature at thefirst roller 101, and is then drawn between thefirst roller 101 and thesecond roller 102. During the drawing, the yarn Ya is thermally treated by theheater 103. In the meanwhile, the yarn Yb on the other package Pb is arranged to run on a yarn path which connects thefirst roller 101 with thesecond roller 102 via theguide 104. The yarn Yb is heated to a drawable temperature at thefirst roller 101, and is then drawn between thefirst roller 101 and thesecond roller 102. Being different from the yarn Ya, the yarn Yb is not thermally treated during the drawing. - The yarn Ya thermally treated after drawn becomes a low-shrinkage yarn with low thermal shrinkage, whereas the non-thermally-treated yarn Yb becomes a high-shrinkage yarn with high thermal shrinkage. These two types of the yarns Ya and Yb are combined at the combining
section 105 by air interlacing or the like, with the result that a differential-shrinkage combined yarn Yx is obtained. - In the above-described known device for production of the combined yarn, packages of material yarns such as UDY and POY are prepared in advance, and two types of yarns different in thermal shrinkage are produced from the material yarns. As such, a combined yarn is produced through at least two steps including a step of producing the packages of the material yarns and a step of producing the two types of yarns from the packages and combining the yarns, and this requires a lot of labor and cost.
- An object of the present invention is to provide a combined yarn producing device capable of serially performing processes from spinning to production of a combined yarn.
- According to the first aspect of the invention, a combined yarn producing device includes: a yarn feed roller configured to feed yarns spun out from a spinning apparatus; a first drawing roller on which a first yarn among the yarns fed from the yarn feed roller is wound, the first drawing roller being configured to be higher in yarn feeding speed than the yarn feed roller and to heat and feed the first yarn drawn between the yarn feed roller and the first drawing roller; a second drawing roller on which a second yarn among the yarns fed from the yarn feed roller is wound, the second drawing roller being configured to be higher in yarn feeding speed than the yarn feed roller, to be lower in roller surface temperature than the first drawing roller, and to feed the second yarn drawn between the yarn feed roller and the second drawing roller; and a combining section configured to combine the first yarn fed from the first drawing roller and the second yarn fed from the second drawing roller.
- The combined yarn producing device of the present invention includes the yarn feed roller configured to feed the yarns spun out from the
spinning apparatus 2 and the two drawing rollers which are higher in the yarn feeding speed than the yarn feed roller. Among the yarns, the first yarn is drawn between the yarn feed roller and the first drawing roller whereas the second yarn is drawn between the yarn feed roller and the second drawing roller. The second drawing roller is lower in the roller surface temperature than the first drawing roller. On this account, after being drawn, the first yarn drawn by the first drawing roller is heated by a higher temperature than the second yarn is. The first yarn and the second yarn after drawn are therefore different in physical properties such as thermal shrinkage. Thereafter, the first yarn and the second yarn are combined in the combining section and a combined yarn is produced. - In the present invention, two types of yarns which are different in physical properties are produced from yarns spun out from the spinning apparatus, and processes until the combination of the two types of the yarns are serially performed. In this way, because the processes from the spinning to the production of the combined yarn are serially performed, labor and cost are significantly reduced as compared to known arrangements.
- According to the second aspect of the invention, the combined yarn producing device of the first aspect is arranged such that the first drawing roller is a heating roller heating the first yarn wound onto a surface of the heating roller, and the second drawing roller is a non-heating roller not heating the second yarn wound onto a surface of the non-heating roller.
- In the present invention, the first yarn drawn between the yarn feed roller and the first drawing roller is heated by the first drawing roller which is a heating roller. In the meanwhile, the second yarn drawn between the yarn feed roller and the second drawing roller is wound onto the second drawing roller which is a non-heating roller, and hence the second yarn is not heated by the second drawing roller.
- According to the third aspect of the invention, the combined yarn producing device of the first or second aspect is arranged such that the yarn feeding speed of the first drawing roller is higher than the yarn feeding speed of the second drawing roller.
- The first yarn which is heated at a high temperature by the first drawing roller after drawn is a rigid yarn as compared to the second yarn. Such a difference in the rigidity is one of reasons why the two types of yarns are not easily interlaced at the combining section. In the present invention, because the yarn feeding speed of the first drawing roller is higher than that of the second drawing roller, there is a difference in the yarn tension at the time of the combination, and hence the tension of the first yarn is lower than that of the second yarn. With this, the rigid first yarn becomes easily bendable, and the interlacing of the first yarn and the second yarn in the combining section is facilitated.
- In this regard, the difference in the tension between the first yarn and the second yarn at the time of the combination is preferably not excessively large. To be more specific, a difference between the yarn feeding speed of the first drawing roller and the yarn feeding speed of the second drawing roller preferably falls within the range of 0.25% to 2.5% of the yarn feeding speed of the first drawing roller (the fourth aspect of the invention).
- According to the fifth aspect of the invention, the combined yarn producing device of any one of the first to fourth aspects is arranged such that the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, and the second yarn is wound onto the second drawing roller at a winding angle of less than 360 degrees.
- In the present invention, the winding angles of the first yarn and the second yarn on the drawing roller are both less than 360 degrees. In other words each yarn is wound not more than once on each drawing roller, and hence the yarn placement on each drawing roller is easily done.
- According to the sixth aspect of the invention, the combined yarn producing device of any one of the first to fourth aspects is arranged such that the first drawing roller and the second drawing roller extend in a predetermined direction, the first yarn before wound onto the first drawing roller and the second yarn before wound onto the second drawing roller run side by side in the predetermined direction, the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, a separate roller is provided in the vicinity of the second drawing roller, and the second yarn is wound at least once between the second drawing roller and the separate roller.
- Being different from the first drawing roller, the second drawing roller does not heat a yarn to a high temperature and hence this roller can be short in diameter. However, when the diameter of the second drawing roller is short, the contact length with the second yarn is short and the gripping force is low. In this regard, in the present invention, the second yarn is wound at least once between the second drawing roller and the separate roller. The contact length between the second drawing roller and the second yarn is therefore long and the gripping force is increased, with the result that the second yarn is less likely to slip.
- In addition to the above, in the present invention, the first yarn and the second yarn are lined up in the roller axial direction. The first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, and hence the yarn path of the first yarn after wound onto the first drawing roller is unlikely to be shifted from the yarn path of the first yarn before wound onto the first drawing roller. In the meanwhile, the second yarn is wound between the second drawing roller and the separate roller at least once, and hence the yarn path of the second yarn after wound onto the second drawing roller is shifted from the yarn path of the second yarn before wound onto the second drawing roller. This makes it possible to cause the yarn path of the first yarn fed by the first drawing roller and the yarn path of the second yarn fed by the second drawing roller to converge, immediately before reaching the combining section.
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FIG. 1 is a front elevation of a spun yarn take-up apparatus of an embodiment. -
FIG. 2 is a perspective view of a heat retaining box, a preheating roller, a first drawing roller, and a second drawing roller. -
FIG. 3 is a front elevation of a spun yarn take-up apparatus of a modification. -
FIG. 4 is a front elevation of a spun yarn take-up apparatus of another modification. -
FIG. 5 is a front elevation of a combined yarn producing device of another modification. -
FIG. 6 is a front elevation of a spun yarn take-up apparatus of another modification. -
FIG. 7 is a front elevation of a spun yarn take-up apparatus of another modification. -
FIG. 8 is a schematic diagram of a known combined yarn producing device. - Now, the following will describe an embodiment of the present invention.
FIG. 1 is a front elevation of a spun yarn take-up apparatus of the present embodiment. Hereinafter, the up-down direction and the left-right direction shown inFIG. 1 will be used as the up-down direction and the left-right direction of the spun yarn take-up apparatus. Furthermore, the direction orthogonal to the plane ofFIG. 1 will be used as the front-back direction of the spun yarn take-up apparatus. The direction away from the plane ofFIG. 1 toward the viewer is the frontward direction. As shown inFIG. 1 , the spun yarn take-up apparatus 1 is provided with members such as a combinedyarn producing device 3, a windingdevice 4, and acontroller 5. - Above the spun yarn take-up apparatus 1, spinnerets 7 (7a and 7b) of a
spinning apparatus 2 are provided. AlthoughFIG. 1 shows only twospinnerets 7, in realityplural spinnerets 7 are provided to be lined up along the left-right direction. From thespinnerets 7, yarns Y (Y1 and Y2) made of synthetic fibers (e.g., polyester fibers) are spun out, respectively. Below eachspinneret 7, anoil guide 8 is provided to apply oil to the spun-out yarns Y. - The combined
yarn producing device 3 is provided withrollers 10 to 19 configured to take up the yarns Y on which the oil has been applied. While therollers 10 to 19 take up the yarns Y, the combinedyarn producing device 3 draws and thermally treats the yarns Y to produce two yarns Y1 and Y2 which are different in physical properties. Furthermore, a single combined yarn Ym is produced by combining the two yarns Y1 and Y2. The structure of the combinedyarn producing device 3 will be detailed later. - The winding
device 4 is configured to wind combined yarns Ym respectively produced by the combinedyarn producing devices 3. The windingdevice 4 includes members such as abobbin holder 21 and acontact roller 22. Thebobbin holder 21 is long in the front-back direction (i.e., the direction orthogonal to the plane ofFIG. 1 ) in shape, and is rotationally driven by an unillustrated motor. To thisbobbin holder 21,bobbins 23 are attached to be lined up along the longitudinal direction of thebobbin holder 21. The windingdevice 4 rotates thebobbin holder 21 so as to wind the combined yarns Ym onto therespective bobbins 23, with the result that packages 24 are formed. Thecontact roller 22 adjusts the shape of eachpackage 24 by making contact with the surface of eachpackage 24 and applying predetermined contact pressure thereto. - The
controller 5 is provided with asetting unit 25 for setting control parameters of various actions of the spun yarn take-up apparatus 1. Based on the parameters set by an operator through the settingunit 25, thecontroller 5 controls the sections of the combinedyarn producing device 3 and the windingdevice 4. For example, thecontroller 5 controls the speed of a motor (not illustrated) by which therollers 10 to 19 of the combinedyarn producing device 3 are driven and the temperature of aheater 30 provide in each of therollers 11 to 15. - Now, the structure of the combined
yarn producing device 3 will be detailed. As shown inFIG. 1 , the combinedyarn producing device 3 includes aroller 10, aheat retaining box 20, preheatingrollers first drawing rollers second drawing roller 16,rollers device 26. - The
rollers 10 to 19 are disposed so that the axial direction of each roller is along the front-back direction. The axial direction may not be in parallel to the front-back direction in at least one of therollers 10 to 19. The axial direction of at least one of the rollers may be slightly deviated upward or downward relative to the front-back direction. Therollers spinning apparatus 2 are fed by therollers 10 to 19 and run side by side in the front-back direction. - Onto the
roller 10, plural (e.g., eight) yarns Y spun out from thespinnerets 7 of thespinning apparatus 2 are wound to be side by side in the axial direction of the roller 10 (i.e., the direction orthogonal to the plane ofFIG. 1 ). Theroller 10 is driven by an unillustrated motor, and takes up the yarns Y spun out from thespinning apparatus 2 and sends the yarns Y to theheat retaining box 20. -
FIG. 2 is a perspective view of theheat retaining box 20, the preheatingrollers 11 to 13, thefirst drawing rollers second drawing roller 16. Theheat retaining box 20 is made of a heat insulating material. Through a right wall member of thisheat retaining box 20, ayarn inlet 20a, afirst yarn outlet 20b, and asecond yarn outlet 20c are formed. Theyarn inlet 20a is formed at a lower end portion of the right wall member of theheat retaining box 20. Thefirst yarn outlet 20b is formed at an upper end portion of the right wall member of theheat retaining box 20, whereas thesecond yarn outlet 20c is formed at a central portion in the up-down direction of the right wall member. - The yarns Y sent from the
roller 10 are introduced into theheat retaining box 20 through theyarn inlet 20a. In theheat retaining box 20, five heating rollers in total, i.e., three preheatingrollers 11 to 13 and twofirst drawing rollers rollers 11 to 13 are provided in a lower space in theheat retaining box 20, whereas the twofirst drawing rollers heat retaining box 20. - The five heating rollers are each rotationally driven by an unillustrated motor. The yarn feeding speeds of the three preheating
rollers 11 to 13 are V1, V2, and V3, respectively. To prevent the yarns Y from becoming slackened, the relationship between the yarn feeding speeds of the three preheatingrollers 11 to 13 is V1<V2<V3. In this way, the running speed of the yarns Y is gradually increased across the three preheatingrollers 11 to 13. In the meanwhile, the yarn feeding speeds of the twofirst drawing rollers first drawing rollers rollers 11 to 13. - In each of the five heating rollers (the three preheating
rollers 11 to 13 and the twofirst drawing rollers 14 and 15), theheater 30 is provided. The yarns Y wound onto each heating roller are heated on the surface of the roller which is maintained at a predetermined temperature by theheater 30. The three preheatingrollers 11 to 13 are heating rollers for heating the yarns Y to a drawable temperature. The roller surface temperatures of the three preheatingrollers roller 13 is arranged to be equal to or higher than a glass transition temperature (e.g., 80 to 95 degrees centigrade in cases of polyester fibers). To efficiently increase the temperature of the yarns Y to the glass transition temperature in a short time, the relationship between the temperatures of the three preheatingrollers 11 to 13 is arranged to be T1>T2>T3. A temperature difference between two neighboring preheating rollers is, for example, about 5 degrees centigrade. - In the meanwhile, the two
first drawing rollers first drawing rollers - The
second drawing roller 16 is provided outside theheat retaining box 20 and to the right of thesecond yarn outlet 20c. Thissecond drawing roller 16 is driven by an unillustrated roller. The yarn feeding speed V6 of thesecond drawing roller 16 is higher than the yarn feeding speeds V1 to V3 of the preheatingrollers 11 to 13. In the present embodiment, the yarn feeding speeds V4 and V5 of thefirst drawing rollers second drawing roller 16. The reason of this arrangement will be given later. - The
second drawing roller 16 is not provided with a heater. In other words, thesecond drawing roller 16 is a non-heating roller which does not heat yarns wound thereon. On this account, the roller surface temperature T6 of thesecond drawing roller 16 is substantially equal to an environmental temperature (e.g., 40 degrees centigrade), and is significantly lower than the roller surface temperatures T4 and T5 of the twofirst drawing rollers - The yarns Y spun out from the
spinning apparatus 2 and taken up by theroller 10 are introduced into theheat retaining box 20 through theyarn inlet 20a, and are wound onto the three preheatingrollers 11 to 13 one by one. Thereafter, the yarns Y are divided into two groups in theheat retaining box 20, and the two groups of the yarns Y go out from theheat retaining box 20 through the twoyarn outlets - Now, among the yarns Y, a yarn Y1 (a first yarn of the present invention) spun out from the
left spinneret 7a inFIG. 1 will be described. To begin with, the yarn Y1 introduced into theheat retaining box 20 through theyarn inlet 20a is wound onto the front parts of the three preheatingrollers 11 to 13, and are preliminarily heated to the drawable temperature by the lower three preheatingrollers 11 to 13. The preliminarily-heated yarn Y1 is then wound onto the upper twofirst drawing rollers roller 13 and thefirst drawing roller 14. The yarn Y1 is heated to a higher temperature while being fed by the upper twofirst drawing rollers heat retaining box 20 through thefirst yarn outlet 20b. - Now, a yarn Y2 (a second yarn of the present invention) spun out from the
right spinneret 7b inFIG. 1 will be described. The yarn Y2 introduced into theheat retaining box 20 through theyarn inlet 20a is wound onto the back parts of the three preheatingrollers 11 to 13, and is preliminarily heated to a drawable temperature by the preheatingrollers 11 to 13. Until this stage, the yarn Y2 is treated in the same manner as the yarn Y1. However, the yarn Y2 is not wound onto the upper twofirst drawing rollers heat retaining box 20 through thesecond yarn outlet 20c. - The yarn Y2 from the
second yarn outlet 20c is wound onto thesecond drawing roller 16. At this stage, the yarn Y2 is drawn due to the difference in the yarn feeding speed between the preheatingroller 13 and thesecond drawing roller 16. In this connection, thesecond drawing roller 16 is a non-heating roller not including a heater. For this reason, unlike the yarn Y1, the yarn Y2 drawn between the preheatingroller 13 and thesecond drawing roller 16 is not thermally set after drawn. On this account, the two yarns Y1 and Y2 are different from each other in physical properties such as thermal shrinkage. - In regard to the thermal shrinkage, the yarn Y2 which is not thermally set after drawn has higher thermal shrinkage than the yarn Y1 which is thermally set. To put it differently, the thermally-set yarn Y1 is a low-shrinkage yarn with low thermal shrinkage, whereas the non-thermally-set yarn Y2 is a high-shrinkage yarn with high thermal shrinkage. The thermal shrinkage (boiling water shrinkage) of the yarn Y1 is, for example, 5 to 10%, whereas the thermal shrinkage of the yarn Y2 is, for example, 10 to 20%.
- In the present embodiment, as shown in
FIG. 1 andFIG. 2 , the yarn Y1 on the front side is wound at a winding angle of less than 360 degrees onto each of the three preheatingrollers 11 to 13 and the twofirst drawing rollers rollers 11 to 13 and thesecond drawing roller 16. To put it differently, because each of the yarns Y1 and Y2 is wound onto each roller once at the maximum, yarn placement can be easily done. In the present embodiment, as shown inFIG. 2 , because the yarn Y2 runs on the back side whereas the yarn Y1 runs on the front side, the yarn placement of the yarn Y2 is performed first and then the yarn placement of the yarn Y1 is performed. The yarn Y1 may run on the back side whereas the yarn Y2 may run on the front side. In such a case, the yarn placement of the yarn Y1 is performed first. - When the winding angle on each roller is less than 360 degrees, the yarn paths of the yarn Y1 and Y2 after the yarns Y1 and Y2 are wound onto each roller are not deviated from the yarn paths before the yarns Y1 and Y2 are wound onto each roller, and hence the yarn Y1 and the yarn Y2 run side by side in the front-back direction. On this account, the yarn paths of the yarn Y1 and the yarn Y2 naturally converge when the yarn path of the yarn Y2 is shifted by slightly tilting the roller axial direction of the
second drawing roller 16 relative to the front-back direction. - As shown in
FIG. 1 , the yarn Y1 coming from theheat retaining box 20 through thefirst yarn outlet 20b and the yarn Y2 coming through thesecond yarn outlet 20c and sent to thesecond drawing roller 16 are both wound onto therollers - On the downstream in the yarn running direction of the
roller 18, the interlacing device 26 (a combining section of the present invention) configured to interlace the two types of the yarns Y1 and Y2 is provided. A nonlimiting example of the interlacingdevice 26 is a device having an interlace nozzle which is configured to blow air in the direction orthogonal to the running direction of the yarns Y to interlace filaments. For example, as shown inFIG. 2 , when the number of each of the yarns Y1 and the yarns Y2 is four, the interlacingdevice 26 has four interlace nozzles. In each interlace nozzle, one yarn Y1 and one yarn Y2 are inserted. In each nozzle, filaments constituting the two yarns Y1 and Y2 are interlaced by the airflow. With this arrangement, four combined yarns Ym are produced by the interlacingdevice 26. The combined yarns Ym produced by the interlacingdevice 26 are sent to the windingdevice 4 by theroller 19, and are wound onto therespective bobbins 23 by the windingdevice 4. - In the explanations above, the yarn feeding speeds of the rollers including the preheating
rollers 11 to 13, thefirst drawing rollers second drawing roller 16 and the temperatures of theheaters 30 in the fiveheating rollers 11 to 15 are set by an operator through the settingunit 25. Based on the yarn feeding speeds and the temperatures set through the settingunit 25, thecontroller 5 controls the rotation speeds of the motors driving the rollers and the heating temperatures of theheaters 30. - In the present embodiment, among the yarns Y spun out from the
spinning apparatus 2, the yarn Y1 is thermally set after drawn whereas the yarn Y2 is not thermally set after drawn, so that two types of yarns Y1 and Y2 which are different in physical properties are produced. Then processes are serially performed until the two types of the yarns Y1 and Y2 are combined. In this way, because the processes from the spinning to the production of the combined yarn Ym are serially performed, labor and cost are significantly reduced as compared to known arrangements. - The
second drawing roller 16 on which the yarn Y2 is wound is not a roller which heats and thermally sets a yarn. On this account, the contact length of the yarn Y2 on the roller is not required to be long. Thesecond drawing roller 16 is therefore only required to be a roller which is large enough to obtain gripping force with which the yarn Y2 is not slipped, and can be shorter in diameter than thefirst drawing rollers second drawing roller 16 is additionally provided in the spun yarn take-up apparatus 1 of the present embodiment. The apparatus, however, is not very large as compared to the known apparatuses because the diameter of thesecond drawing roller 16 can be short. - The yarn Y1 which is thermally set at a high temperature is a rigid yarn as compared to the yarn Y2 which is not thermally set. Such a difference in the rigidity is one of reasons why the two types of the yarns Y1 and Y2 are not easily interlaced at the interlacing
device 26. In this regard, in the present embodiment, because the yarn feeding speeds V4 and V5 of thefirst drawing rollers second drawing roller 16, the yarns Y1 and Y2 are different in the yarn tension at the time of the combination, and the tension of the yarn Y1 is lower than the tension of the yarn Y2. With this, the rigid yarn Y1 becomes easily bendable, and the interlacing of the two types of the yarns Y1 andY 2 in the interlacingdevice 26 is facilitated. In this regard, the difference in the yarn tension between the two types of the yarns Y1 and Y2 at the time of the combination is preferably not excessively large. On this account, the difference in the speed between thefirst drawing rollers second drawing roller 16 is preferably 0.25% to 2.5% of the yarn feeding speeds V4 and V5 of thefirst drawing rollers - The spun yarn take-up apparatus of the present embodiment can be used not only for producing the combined yarn Ym by combining the two types of the yarns Y1 and Y2 but also for producing only one type of yarns. For example, all of the yarns Y spun out from the
spinnerets 7 of thespinning apparatus 2 are wound onto the twofirst drawing rollers second drawing roller 16. With this, all of the yarns Y are thermally set after drawn, so that only the yarns with low thermal shrinkage are produced. On the contrary, when all of the yarns Y spun out from thespinnerets 7 are wound onto thesecond drawing roller 16 and all of the yarns Y are not thermally set after drawn, only yarns with high thermal shrinkage are produced. - Now, various modifications of the embodiment above will be described. The members identical with those in the embodiment above will be denoted by the same reference numerals and the explanations thereof are not repeated.
- 1] Between the yarn Y1 which is a low-shrinkage yarn and the yarn Y2 which is a high-shrinkage yarn, the yarn thickness (e.g., thickness of each filament and/or the number of filaments) may be different. When a wound combined yarn Ym is thermally treated in a later process, the yarn Y1 which is a low-shrinkage yarn is on the outer side and functions as a sheath yarn, whereas the yarn Y2 which is a high-shrinkage yarn is on the inner side and functions as a core yarn. On this account, when, for example, the yarn Y1 which functions as the sheath yarn is narrow whereas the yarn Y2 which functions as the core yarn is thick, a yarn which is tense and stiff but is gentle in touch is obtained, and such an arrangement is preferred in terms of the texture. To differentiate the yarn Y1 from the yarn Y2 in thickness, the arrangements (the size of holes spinning out filaments or the number of the holes) of the
spinnerets 7 producing the respective yarns are differentiated, or the amounts of discharged polymer are differentiated. - 2] While in the embodiment above the
second drawing roller 16 on which the yarn Y2 is wound is a non-heating roller not including a heater, thesecond drawing roller 16 may be a heating roller including aheater 31 as shown inFIG. 3 . In such a case, thecontroller 5 controls theheater 31 so that the roller surface temperature of thesecond drawing roller 16 is lower than the roller surface temperatures of thefirst drawing rollers heater 31 of thesecond drawing roller 16 may be turned on or off by thecontroller 5 in consideration of the type of the yarn to be produced. - 3] As shown in
FIG. 4 , theseparate roller 33 may be provided in the vicinity of thesecond drawing roller 16, and the yarn Y2 may be wound at least once between thesecond drawing roller 16 and theseparate roller 33. - As described in the embodiment above, the
second drawing roller 16 can be arranged to be shorter in diameter than thefirst drawing rollers second drawing roller 16 is short, the contact length with the yarn Y2 is short and the gripping force is low. In this regard, when the yarn Y2 is wound at least once between thesecond drawing roller 16 and theseparate roller 33 as shown inFIG. 4 , the contact length between thesecond drawing roller 16 and the yarn Y2 is long and the gripping force is increased, with the result that the yarn Y2 is less likely to slip. Because a main objective of this arrangement is to increase the gripping force, the number of times of the winding of the yarn Y2 is not required to be large, and once or twice is sufficient. - In addition to the above, as described in the embodiment above, the yarn Y1 before wound onto the
first drawing rollers second drawing roller 16 run side by side in the front-back direction (seeFIG. 2 ). The yarn Y1 on the front side is wound onto the winding angle of less than 360 degrees onto thefirst drawing rollers first drawing rollers first drawing rollers second drawing roller 16 and theseparate roller 33, and hence the yarn path of the yarn Y2 after wound onto thesecond drawing roller 16 is shifted frontward as compared to the yarn path of the yarn Y2 before wound onto thesecond drawing roller 16. This makes it possible to cause the yarn path of the yarn Y1 fed by thefirst drawing rollers second drawing roller 16 to converge, before the combination by the interlacingdevice 26. - To be more specific, as the yarn Y2 is wound once onto the
second drawing roller 16 and theseparate roller 33, the yarn paths of the yarn Y1 and the yarn Y2 are converged. When the yarn Y2 is wound twice, the yarn path of the yarn Y2 is shifted in the direction away from the yarn Y1. The amount of the shifting, however, is small, and hence it is not difficult to cause the yarn path of the yarn Y2 and the yarn path of the yarn Y1 to be converged. When the yarn Y2 is wound more than twice, it becomes difficult to cause the yarn paths to be converged because of a large amount of the shifting from the yarn path of the yarn Y1. For this reason, the yarn paths of the yarn Y1 and the yarn Y2 are easily converged when the yarn Y2 is wound once or twice. Conversely, the diameter of thesecond drawing roller 16 may be determined so that required gripping force is obtained with the winding of the yarn Y2 once or twice. InFIG. 4 , the yarn placement of the yarn Y2 on the back side is performed first, and the yarn Y2 is wound once or twice onto each of thesecond drawing roller 16 and theseparate roller 33, from the back side to the front side. Thereafter, the yarn Y1 on the front side is placed. - 4] In the embodiment above, the yarn feed rollers (preheating
rollers 11 to 13) feeding the yarns Y (both of the yarn Y1 and the yarn Y2) spun out from thespinning apparatus 2 are heating rollers. Alternatively, these yarn feed rollers may be non-heating rollers. For example, when the fiber material is nylon, preliminary heating before the drawing tends to be unnecessary because of the low glass transition temperature (about 40 to 50 degrees centigrade). In such cases, the yarn feed rollers may be non-heating rollers. - 5] The numbers of the rollers and the layout of the rollers may be suitably changed.
- (1) As shown in
FIG. 5(a) , thesecond drawing roller 16 may be provided to the right of theroller 17. With this arrangement, the winding angle of the yarn Y2 on thesecond drawing roller 16 is large and hence the gripping force is increased. In addition to the above, in, for example,FIG. 1 , thesecond drawing roller 16 is provided in a space between the yarn path from thespinnerets 7 to theroller 10 and the yarn path between theroller 17 and theroller 18. This space, however, is small in reality, and hence yarn placement is not easy and must be carefully done. In this connection, such a problem does not occur inFIG. 5(a) , because thesecond drawing roller 16 is provided in a space to the right of the yarn path between theroller 17 and theroller 18. - In addition to the above, as shown in
FIG. 5(b) , the yarn Y2 sent by thesecond drawing roller 16 may be directly sent to theroller 18 without being wound onto theroller 17. In addition to the above, as shown inFIG. 5(c) , the yarn Y2 may be directly sent to theroller 18 without being wound onto theroller 17 in the same manner as inFIG. 5(b) , and may be wound at least once between thesecond drawing roller 16 and theseparate roller 33. - (2) A spun yarn take-up
apparatus 61 shown inFIG. 6 includes two preheatingrollers first drawing rollers heat retaining box 40, and asecond drawing roller 45 provided outside theheat retaining box 40. - The two preheating
rollers heat retaining box 40, whereas the twofirst drawing rollers heat retaining box 40. These fourrollers 41 to 44 are heating rollers each including aheater 50. In the meanwhile, thesecond drawing roller 45 is a non-heating roller not including a heater, and is provided below theheat retaining box 40. - The
controller 5 controls the motors (not illustrated) and theheaters 50 for the two preheatingrollers first drawing rollers heat retaining box 40, respectively. The yarn feeding speeds V3 and V4 of the twofirst drawing rollers rollers first drawing rollers rollers - In addition to the above, the
controller 5 controls the motor of thesecond drawing roller 45. The yarn feeding speed V5 of thesecond drawing roller 45 is arranged to be higher than the yarn feeding speeds V1 and V2 of the preheatingrollers second drawing roller 45 is a non-heating roller, the roller surface temperature T5 of thesecond drawing roller 45 is lower than the roller surface temperatures T3 and T4 of the twofirst drawing rollers - The yarns Y spun out from the
spinning apparatus 2 are introduced into theheat retaining box 40 through theyarn inlet 40a. The yarn Y1 among the yarns Y is, to begin with, wound onto the two preheatingrollers rollers first drawing rollers rollers first drawing rollers heat retaining box 40 through thefirst yarn outlet 40b and is wound onto theroller 47. - In the meanwhile, the yarn Y2 among the yarns is wound onto the two preheating
rollers rollers heat retaining box 40 through thesecond yarn outlet 40c and is wound onto thesecond drawing roller 45. The yarn Y2 is drawn between therollers second drawing roller 45, however, is a non-heating roller, and hence the yarn Y2 is not thermally set after drawn. Thereafter, the yarn Y2 is fed by therollers device 49 provided between therollers device 4. - (3) In the arrangement shown in
FIG. 6 , modifications similar to those in the arrangement above shown inFIG. 4 may be done. That is to say, as shown inFIG. 7 , theseparate roller 51 may be provided in the vicinity of thesecond drawing roller 45 and the yarn Y2 may be wound at least once between thesecond drawing roller 45 and theseparate roller 51. In the arrangement shown inFIG. 7 in which the yarn Y2 is wound at least once onto thesecond drawing roller 45, theroller 46 shown inFIG. 6 may be omitted.
Claims (6)
- A combined yarn producing device comprising:a yarn feed roller configured to feed yarns spun out from a spinning apparatus;a first drawing roller on which a first yarn among the yarns fed from the yarn feed roller is wound, the first drawing roller being configured to be higher in yarn feeding speed than the yarn feed roller and to heat and feed the first yarn drawn between the yarn feed roller and the first drawing roller;a second drawing roller on which a second yarn among the yarns fed from the yarn feed roller is wound, the second drawing roller being configured to be higher in yarn feeding speed than the yarn feed roller, to be lower in roller surface temperature than the first drawing roller, and to feed the second yarn drawn between the yarn feed roller and the second drawing roller; anda combining section configured to combine the first yarn fed from the first drawing roller and the second yarn fed from the second drawing roller.
- The combined yarn producing device according to claim 1, wherein,
the first drawing roller is a heating roller heating the first yarn wound onto a surface of the heating roller, and
the second drawing roller is a non-heating roller not heating the second yarn wound onto a surface of the non-heating roller. - The combined yarn producing device according to claim 1 or 2, wherein, the yarn feeding speed of the first drawing roller is higher than the yarn feeding speed of the second drawing roller.
- The combined yarn producing device according to claim 3, wherein, a difference between the yarn feeding speed of the first drawing roller and the yarn feeding speed of the second drawing roller falls within the range of 0.25% to 2.5% of the yarn feeding speed of the first drawing roller.
- The combined yarn producing device according to any one of claims 1 to 4, wherein,
the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees, and
the second yarn is wound onto the second drawing roller at a winding angle of less than 360 degrees. - The combined yarn producing device according to any one of claims 1 to 4, wherein,
the first drawing roller and the second drawing roller extend in a predetermined direction,
the first yarn before wound onto the first drawing roller and the second yarn before wound onto the second drawing roller run side by side in the predetermined direction,
the first yarn is wound onto the first drawing roller at a winding angle of less than 360 degrees,
a separate roller is provided in the vicinity of the second drawing roller, and
the second yarn is wound at least once between the second drawing roller and the separate roller.
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JP2015101507A JP6671110B2 (en) | 2015-05-19 | 2015-05-19 | Mixed fiber production equipment |
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EP3095900A1 true EP3095900A1 (en) | 2016-11-23 |
EP3095900B1 EP3095900B1 (en) | 2018-04-18 |
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EP16168913.8A Active EP3095900B1 (en) | 2015-05-19 | 2016-05-10 | Combined yarn producing device |
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Cited By (2)
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CN109652887A (en) * | 2018-12-19 | 2019-04-19 | 浙江恒澜科技有限公司 | A kind of production method of double-colored imitative hair polyester fiber |
EP3842576A1 (en) * | 2019-12-24 | 2021-06-30 | TMT Machinery, Inc. | Combined filament yarn producing device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7053287B2 (en) * | 2018-01-29 | 2022-04-12 | Tmtマシナリー株式会社 | Spinning and stretching equipment |
CN111485297A (en) * | 2020-03-23 | 2020-08-04 | 扬州海众织物有限公司 | Shaping method of plastic woven base fabric |
CN116163024B (en) * | 2022-12-09 | 2023-10-03 | 浙江恒优化纤有限公司 | Equipment and process for producing polyester POY/FDY differential shrinkage mixed filament yarn |
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Also Published As
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JP2016216846A (en) | 2016-12-22 |
JP6671110B2 (en) | 2020-03-25 |
CN106167922A (en) | 2016-11-30 |
EP3095900B1 (en) | 2018-04-18 |
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