JP2009155067A - Winding device for false twisted yarn of thermoplastic synthetic fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding device for false twisted yarn of a thermoplastic synthetic fiber having a good thread guard property, improving the generation of sliding or decentering with a bobbin holder, and capable of obtaining a stable package form. <P>SOLUTION: In this winding device, a pair of cradles clipping a paper pipe from both ends is provided with a rotatable bobbin holder, and the bobbin holder has shapes of the following (1) and (2). (1) A paper pipe clipping portion on a tail forming side of the bobbin holder has a columnar shape. (2) A paper pipe clipping portion on an opposite tail forming side of the bobbin holder is a conical shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a winding device for false twisted yarn of thermoplastic synthetic fiber, and more particularly, in a rotatable bobbin holder that grips a paper tube provided in a pair of cradles from both ends, the bobbin holder By setting the shape of the paper tube gripping part to a different shape on the paper tube tail forming side and the anti-tail forming side, it is possible to obtain extremely good yarn threading properties, and false twisted yarn of thermoplastic synthetic fiber that can obtain a package foam The present invention relates to a winding device.

  Conventionally, a winding device for false twisted yarn of thermoplastic synthetic fiber is passively rotated by contacting a drive roller that rotates an empty paper tube held by a pair of left and right bobbin holders rotatably supported by a cradle. And winding the yarn while traversing it with a traverse guide, forming a yarn layer, and then extending the full package that has been wound up by removing the bobbin holder by expanding the cradle. It is known (see, for example, Patent Document 1).

  On the other hand, in such a winding method and apparatus, the shape and material of the bobbin holder that holds the paper tube are important.

In particular, the package soiling is deteriorated due to the deterioration of the thread gripping property when threading, the package form failure due to slipping between the bobbin holder and the paper tube, and the paper tube scraping scraping due to the scraping of the paper tube gripping part caused by the slipping. In addition, there has been a problem that product defects such as the occurrence of looseness of the package end face due to the eccentricity caused by the misalignment between the bobbin holder and the paper tube often occur.
Japanese Patent Laid-Open No. 10-194596

  The object of the present invention is to improve the drawbacks of the prior art, improve the threading property, improve the problem of slippage and eccentricity between the bobbin holder and the paper tube, and obtain a stable package foam. An object of the present invention is to provide a false twisted yarn winding device for thermoplastic synthetic fibers.

The object of the present invention described above can be achieved by adopting the following configuration. That is,
[1] A false twisting process of a thermoplastic synthetic fiber, characterized in that a pair of cradle holding a paper tube from both ends is provided with a rotatable bobbin holder, and the bobbin holder has the following shapes (1) and (2) Yarn winding device.
(1) The shape of the paper tube gripping portion on the tail forming side of the bobbin holder is a cylindrical shape,
(2) The shape of the paper tube gripping portion on the anti-tail forming side of the bobbin holder is conical.

  [2] The winding device for false twisted yarn of thermoplastic synthetic fiber according to (1), wherein the bobbin holder has a swing function.

  [3] The winding device for false twisted yarn of thermoplastic synthetic fiber according to (1) or (2), wherein the material of the bobbin holder is metal.

  [4] The thermoplastic synthetic fiber according to any one of (1) to (3) above, wherein the inclination angle of the paper tube gripping portion of the conical bobbin holder is 60 ° <θ <90 ° False twisted yarn winding device.

  According to the present invention, as described below, the shape of the paper tube gripping portion of the bobbin holder is different on the paper tube tail forming side and the anti-tail paper tube forming side. It is possible to solve the problem of slippage and eccentricity between the holder and the paper tube and obtain a stable package foam.

  Hereinafter, the winding device for false twisted yarn of thermoplastic synthetic fiber of the present invention will be described in more detail with reference to the drawings.

  FIG. 1 is a schematic view showing an embodiment of a false twisting device used in the present invention, and FIG. 2 is a top view showing an example of a false twisting yarn winding device of the present invention.

  FIG. 3 is a side sectional view showing an example of the engagement relationship between the tail side of the paper tube used in the present invention and the bobbin holder, and FIG. 4 shows the anti-tail side of the paper tube used in the present invention and the bobbin holder. It is side surface sectional drawing which shows an example of the engagement relationship with.

  5 is a top view showing an example of the false twisting yarn winding device of the present invention, and FIG. 6 is a side sectional view showing an example of a bobbin holder (cylindrical shape) used in the present invention. These are side surface sectional drawings which show an example of the bobbin holder (conical shape) used by this invention.

  In the false twisted yarn of the thermoplastic synthetic fiber of the present invention, for example, as shown in FIG. 1, the undrawn yarn 1 is drawn out through a yarn guide 2, and the first feed roller 3 and the second feed roller 7 are And a false twisting member (a friction false twisting type in the example shown in the figure) via a drawing false twisting heater 4 and a cooling plate 5 disposed between the first feed roller 3 and the second feed roller 7. (Disc unit) 6 is provided with false twist, and entanglement is provided by an entanglement nozzle 8 disposed between the second feed roller 7 and the third feed roller 9, and further the third feed roller 9 and the yarn path It passes through the conversion guides 11 and 12 and is wound around a paper tube in contact with the drive roller 13 to form a package 14 of drawn false twisted yarn.

  As shown in FIG. 2, such a device for winding a thermoplastic synthetic fiber false twisted yarn is wound around a paper tube 17 held by a bobbin holder 16 that can be rotated around a pair of cradle 15 to form a package 14. ing.

  When the shape of the paper tube gripping portion of the pair of left and right bobbin holders 16 that grips the paper tube 17 is, for example, a cylindrical shape as shown in FIG. 3, the specifications of the paper tube 17 vary depending on the production accuracy and the storage method. Often, the inner diameter of the paper tube 17 is equal to or greater than the diameter of the cylindrical portion. For this reason, the end surface of the paper tube 17 is in strong contact with the bobbin holder 16a, so that the contact portion wears over time, and slipping occurs between the bobbin holder 16a and the paper tube 17 due to fluctuations in the winding tension of the false twisted yarn. There is a problem that a package form defect occurs, and further, paper tube scraping scraps adhere to the package due to slippage of the paper tube gripping portion of the bobbin holder 16a and the paper tube 17, and a stain defect occurs.

  Further, when the shape of the pair of left and right bobbin holders 16 holding the paper tube 17 is the conical bobbin holder 16b shown in FIG. 4, the end surface of the paper tube 17 can be adapted to the change in the inner diameter of the paper tube. Since there is no slip between the paper tube 17 and the bobbin holder 16b over time without contact with the wire, there is no fluctuation in the winding tension of the false twisted yarn, and there is no package foam defect or dirt defect. .

  However, if the paper tube gripping portion of the paper tube 17 and the bobbin holder 16b is tilted, the winding is continued without being corrected. Therefore, misalignment between the paper tube 17 and the bobbin holder 16b occurs, and the eccentricity occurs. There is a problem in that the yarn is missing from the end surface of the package due to vibration caused by the vibration, and the yarn end is pinched between the paper tube 17 and the bobbin holder 16b when the yarn hooking is started. However, since the end face of the paper tube 17 and the bobbin holder 16b are not in contact with each other, there is a problem that the thread is not gripped and the start failure occurs.

  Therefore, the winding device for false twisted yarn of thermoplastic synthetic fiber of the present invention has a cylindrical shape as the paper tube gripping portion of the paper tube 17a on the tail forming side of the bobbin holder 16a as shown in FIG. By making the shape of the paper tube gripping portion of the paper tube 17b on the anti-tail forming side of the holder 16b into a conical shape and making the shape of the paper tube gripping portion on the tail forming side and the anti-tail forming side different, Since the bobbin holder 16a and the end face of the paper tube 16a are in close contact with each other, the thread gripping property during threading is improved, the threading property is improved, and the bobbin holder 16b can cope with a change in the inner diameter of the paper tube 16b. Since the end face of the paper tube 16b can be securely gripped and the bobbin holder 16b does not contact and wear, the product defect due to the anti-slip effect is improved, and a stable package foam It is to be obtained.

  Moreover, since high-speed false twisting was enabled by this invention, false twisting speed can be made into the range of 400-1200 m / min. The false twisting speed is preferably in the range of 400 to 1200 m / min, more preferably in the range of 600 to 800 m / min. When the false twisting speed is less than 400 m / min, the cost is increased and the productivity is deteriorated. On the other hand, if it exceeds 1200 m / min, false twisting yarn breakage will increase, which will cause the operability to deteriorate.

  Next, the bobbin holders 16a and 16b attached to the cradle 15 shown in FIG. 5 are generally fixed types in which the angle does not change, but by expanding the full package 14 that has been rolled up, Although it has been removed from the bobbin holders 16a and 16b, in the case of the fixed type, there is a problem that the full package 14 is tilted and does not come off well, contacts the winding device, and stains and fluff are generated.

  Therefore, the angle of the attachment portion of the bobbin holders 16a and 16b of the present invention is provided with a swing function so that it can be freely changed, and the swing function has a function that is aligned with the bearing. The effect of improving the detachability of the full package 14 from the bobbin holders 16a and 16b can be exhibited.

  The bobbin holders 16a and 16b are preferably made of metal in order to suppress wear, and more preferably by applying hard plating to the surface of the metal.

  Furthermore, the inclination angle θ of the conical shape of the paper tube gripping portion of the bobbin holder 16b shown in FIG. 7 is preferably 60 ° <θ <90 °, more preferably 70 ° <θ <80 °.

  In addition, when the inclination angle θ is 90 °, the end face of the paper tube 17b and the bobbin holder 16b come into strong contact with each other, which promotes wear, causes slipping and paper tube scraping, and causes package defects and dirt defects. There is.

  Further, when the inclination angle θ is less than 60 °, the gripping force of the paper tube 17 and the bobbin holder 16b is reduced, and a package form defect occurs due to a slip factor.

Hereinafter, the present invention will be described more specifically with reference to examples. The measurement and evaluation items in the examples were measured by the methods described below.
(1) Rotational speed difference measurement between paper tube and bobbin holder Rotational speed difference (bobbin holder rotation speed-paper tube rotation speed) using Nidec Sympo Co., Ltd. digital rotation speed meter to confirm the slip condition Was measured.
(2) Start success rate At the start of false winding of the false twisted yarn, the rate at which the yarn was securely gripped between the bobbin holder and the paper tube and successfully wound onto the paper tube was calculated as the start success rate = {( The number of starts−the number of failures) / the number of starts} × 100, and 95% or more was accepted.

Example 1
A 150 dtex, 36-filament polyester semi-stretched yarn spun at a spinning speed of 3000 m / min is stretched using a polyurethane friction disk as a false twisting member 6 by a drawing false twisting apparatus shown in FIG. Stretch false twisting was performed at a draw ratio of 1.80 times and a heating temperature of 220 ° C. to obtain a stretched polyester yarn of 84 dtex and 36 filaments. When winding the drawn false twisted yarn, the shape of the gripping part on the paper tube tail side of the bobbin holder is cylindrical, the shape on the opposite side of the paper tube is conical, and there is a swing mechanism. The winding device having a gripping portion with an inclination angle of 85 ° was used to confirm whether the bobbin holder was worn, whether the full package was removed from the bobbin holder, whether there was a defective yarn, and the start success rate. In addition, (circle) is a pass in comprehensive evaluation, and x is a disqualification.

Example 2
When winding the false twisted yarn similar to that in Example 1, the shape of the grip portion on the paper tube tail side of the bobbin holder is a cylindrical shape, the shape on the side opposite to the paper tube is a cone shape, and there is a swing mechanism, and the material is The same confirmation as in Example 1 was performed with a winding device in which the inclination angle of the metal and conical paper tube gripping portion was 80 °.

Example 3
When winding the false twisted yarn similar to that in Example 1, the shape of the grip portion on the paper tube tail side of the bobbin holder is a cylindrical shape, the shape on the side opposite to the paper tube is a cone shape, and there is a swing mechanism, and the material is The same confirmation as in Example 1 was performed with a winding device in which the inclination angle of the metal and conical paper tube gripping portion was 70 °.

Example 4
When winding the false twisted yarn similar to that in Example 1, the shape of the grip portion on the paper tube tail side of the bobbin holder is a cylindrical shape, the shape on the side opposite to the paper tube is a cone shape, and there is a swing mechanism, and the material is The same confirmation as in Example 1 was performed with a winding device in which the inclination angle of the metal and conical paper tube gripping portion was 65 °.

Comparative Example 1
When winding the false twisted yarn similar to that of Example 1, the bobbin holder has a conical shape on both the paper tube tail side and the non-tail side, with a swing mechanism, made of resin, the inclination angle of the conical paper tube gripping part The same confirmation as in Example 1 was performed using a 70 ° winding device.

Comparative Example 2
When winding the false twisted yarn similar to that of Example 1, both the paper tube tail side and the non-tail side of the bobbin holder are cylindrical, no swing mechanism, and the material is a resin winding device. A similar confirmation was made.

Comparative Example 3
When winding the false twisted yarn similar to that of Example 1, the shape of the gripping portion on the paper tube tail side of the bobbin holder is a conical shape, the shape on the side opposite to the paper tube is a cylindrical shape, no swing mechanism, material The same confirmation as in Example 1 was performed with a winding device in which the inclination angle of the metal and conical paper tube gripping portion was 80 °.

  Table 1 summarizes the results of Examples 1 to 4 and Comparative Examples 1 to 3.

It is the schematic which showed one embodiment of the false twist processing apparatus used by this invention. It is a top view which shows an example of the false twist process yarn winding apparatus of this invention. It is side surface sectional drawing which shows an example of the engagement relation of the tail side of the paper tube used by this invention, and a bobbin holder. It is side surface sectional drawing which shows an example of the engagement relationship of the anti-tail side of the paper tube used by this invention, and a bobbin holder. It is a top view which shows an example of the false twist process yarn winding apparatus of this invention. It is side surface sectional drawing which shows an example of the bobbin holder (column shape) used by this invention. It is side surface sectional drawing which shows an example of the bobbin holder (conical shape) used by this invention.

Explanation of symbols

1: Semi-stretched yarn package 2: Yarn guide 3: First feed roller 4: Stretch false twist heater 5: Cooling plate 6: Friction false twist disc unit 7: Second feed roller 8: Entangling nozzle 9: Third feed roller 10: Oiling rollers 11, 12: Yarn path change guide 13: Drive roller 14: Stretched false twisted yarn package 15: Cradle 16: Bobbin holder 16a: Bobbin holder (cylindrical shape)
16b: Bobbin holder (conical shape)
17: Paper tube 17a: Paper tube tail forming side 17b: Paper tube anti-tail forming side

Claims (4)

A pair of cradle holding a paper tube from both ends is provided with a rotatable bobbin holder, and the bobbin holder has the following shapes (1) and (2): Take-off device.
(1) The shape of the paper tube gripping portion on the tail forming side of the bobbin holder is a cylindrical shape,
(2) The shape of the paper tube gripping portion on the anti-tail forming side of the bobbin holder is conical.   The bobbin holder has a swing function, The winding device for false twisted yarn of thermoplastic synthetic fiber according to claim 1.   The bobbin holder is made of metal, and the winding device for the false twisted yarn of thermoplastic synthetic fiber according to claim 1 or 2.   Winding of false twisted yarn of thermoplastic synthetic fiber according to any one of claims 1 to 3, wherein the inclination angle of the paper tube gripping portion of the conical bobbin holder is 60 ° <θ <90 ° Take-off device.

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