EP0848093A2 - Twisting tenser - Google Patents

Twisting tenser Download PDF

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Publication number
EP0848093A2
EP0848093A2 EP97121097A EP97121097A EP0848093A2 EP 0848093 A2 EP0848093 A2 EP 0848093A2 EP 97121097 A EP97121097 A EP 97121097A EP 97121097 A EP97121097 A EP 97121097A EP 0848093 A2 EP0848093 A2 EP 0848093A2
Authority
EP
European Patent Office
Prior art keywords
tenser
yarn
twisting
rough surface
guide pipe
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.)
Withdrawn
Application number
EP97121097A
Other languages
German (de)
French (fr)
Other versions
EP0848093A3 (en
Inventor
Masao Uehare
Tatsuo Kimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP0848093A2 publication Critical patent/EP0848093A2/en
Publication of EP0848093A3 publication Critical patent/EP0848093A3/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/10—Tension devices
    • D01H13/104—Regulating tension by devices acting on running yarn and not associated with supply or take-up devices
    • D01H13/106—Regulating tension by devices acting on running yarn and not associated with supply or take-up devices for double-twist spindle

Definitions

  • the present invention relates to a twisting tenser for composite yarn, including elastic yarn.
  • Twisting machines that actually twist yarn such as double twisting machines, twist yarn by forcing it to be turned and folded back by means of the rotation of a spindle while applying an appropriate tension to the yarn using a tenser, followed by the winding of the yarn around a package.
  • Yarn that is twisted includes not only cotton but also wool, acrylic, rayon, and polyester, which may be supplied as single yarn or combined into composite yarn, as appropriate.
  • this invention provides a twisting tenser for composite yarn, including elastic yarn, wherein the upper end of the tenser that engages the composite yarn has a rough surface.
  • the rough surface preferably has a surface roughness of 4 ⁇ m to 15 ⁇ m R max . This configuration prevents elastic yarn from being delayed compared to the other yarn in entering the shaft hole at the upper end of the tenser, thereby preventing the yarn from branching or being cut.
  • the rough surface is preferably finished by blasting (spraying solid metal or mineral or vegetable abrasive material onto a processed surface at a high speed to clean, polish, or harden the surface). Alternatively, the rough surface may be biscuit-fired. This configuration enables a desired rough surface to be formed easily and reliably.
  • Figure 1 is a side view of the integral part of an embodiment of a twisting tenser according to this invention.
  • Figure 2 is a schematic cross-sectional view of the upper end of a guide pipe in Figure 1.
  • Figure 3 is a side cross-sectional view of the overall double twisting machine in Figure 1.
  • Figure 4 is a side view showing a conventional twisting tenser.
  • FIGS 1 and 3 show a twisting tenser 10 according to this invention provided in a double twisting machine 11.
  • the double twisting machine 11 comprises a stationary cylinder 12 with a bottom for holding and accommodating a package P, spindle 13 provided on the bottom of the stationary cylinder 12, and a rotating disc 14 mounted on the spindle 13.
  • the package P is formed as a package for composite yarn Y consisting of polyurethane yarn y 1 which is elastic and cotton yarn y 2 .
  • a shaft portion 15 of an appropriate height is provided at the bottom of the stationary cylinder 12 and coaxially fitted on an upper shaft 13a of a spindle 13 via a bearing 16, and a holder 17 is mounted at the upper end of the shaft portion to detachably hold the tenser 10 for twisting yarn.
  • a long narrow guide pipe 19 is provided at the upper part of the tenser 10 to guide the composite yarn Y to an urging member 18.
  • a flyer 20 extending in the radial direction is provided on the guide pipe 19 via a holder section 21 in such a way as to rotate around the shaft.
  • the composite yarn Y from the package P is guided by the flyer 20, which is turned in response to the release of the yarn Y, to enter the shaft hole 19a in the guide pipe 19, and is then guided to the upper shaft 13a of the spindle 13 while being subjected to an appropriate tension by the urging member 18 below the shaft hole 19a.
  • the composite yarn Y which has entered the shaft hole 19a in the spindle 13, exits the rotating disc 14 in the radial outward direction and is turned to form a balloon outside the stationary cylinder 12. It then passes through a guide member 22 provided above the twisting tenser 10 and is then wound by a take-up device (not shown in the drawings) into a predetermined shape.
  • the upper end 23 of the guide pipe 19 that constitutes the upper end of the tenser has a rough surface 24 with an appropriate surface roughness.
  • that section of the upper end 23 of the stainless-steel-plated guide pipe 19 that engages the composite yarn Y and is of a specified length (for example, 3 mm to 5 mm from the upper end) is finished by blasting from its outer circumferential surface through its round upper-end surface to its inner circumferential surface.
  • the guide pipe 19 has an outer diameter of about 8 mm and an inner diamter about 5 mm
  • its outer circumferential surface within about 5 mm from the top and its inner circumferential surface within 3 mm from the top are finished by blasting. Shots formed by crushing, such as a chilled cast-iron ball, are used as blast particles instead of sand.
  • the rough surface 24 formed in this manner has a cross section in the form of relatively smooth and round waves (continuous circular arc), as shown schematically in Figure 2.
  • the surface is not damaged.
  • the surface roughness is greater than that of the conventional spectral finish.
  • a normal spectral finish shall have a surface roughness of 3S or less, so the rough surface 24 has a surface roughness exceeding this value. That is, according to the standard, the interval (maximum height R max ) between the two lines (25, 26) that sandwich a target portion and are parallel to the average height of the sampled portion having a reference length L (for example, 1 mm) is, for example, 4.0 ⁇ m or more, preferably 5.0 ⁇ m to 15.0 ⁇ m.
  • a biscuit-fired ceramic guide (not shown in the drawings) having a shaft hole may be placed on the upper end of a metallic guide pipe without the use of shot blasting. That is, although in the normal manufacture of ceramics a base is formed into a hard product through two firing processes, the ceramic guide fitted on the upper end is obtained by firing the base into a porous state without final hardening.
  • the surface of this biscuit is also a relatively smooth rough surface 24, as shown in Figure 2.
  • the upper end 23 of the guide pipe 19 is formed as a rough surface 24, for example, even polyurethane yarn y 1 that is thick and viscous and has a fineness of 70 to 140 denier is subjected to reduced frictional resistance when entering the shaft hole 19a, and is prevented from adhering to the upper end 23 and being significantly delayed compared to the cotton yarn y 2 . Consequently, the yarn is prevented from branching or being cut (see Figure 1). That is, this invention enables the composite yarn Y, including elastic yarn y 1 , to be actually twisted in order to extend the applicable range of the yarn type and thickness, thereby improving the general versatility of the twisting tenser 10 and the double twisting machine 11.
  • this invention has a very simple configuration and can be easily applied to existing twisting machines and twisting tensers without an excessive increase in manufacturing costs.
  • the shot-blasted or biscuit-fired ceramic guide can be used to easily and reliably form a preferable rough surface 24 with an appropriate surface roughness.
  • This invention is not limited to the combination of polyurethane yarn y 1 and cotton yarn y 2 as the composite yarn Y, but is useful for composite yarn Y that includes different elastic yarn.
  • twisting tenser according to this invention is not limited to the double twisting machine 11 of the type shown in Figure 3, but is widely applicable to similar twisting apparatuses.
  • the inventions prevent the elastic yarn from being delayed compared to the other yarn in entering the shaft hole at the upper end of the tenser, thereby preventing the yarn from branching or being cut and enabling the composite yarn, including the elastic yarn, to be twisted.
  • the inventions enable the upper end of the tenser to be easily and reliably formed with the desired rough surface.
  • the invention provides a smaller contact area than a structure with a separate cap mounted on the guide pipe, thereby preventing the branching or cutting of the yarn caused by its adherence.
  • This invention can be easily applied to existing twisting machine or twisting tenser.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

To enable composite yarn, including thick elastic yarn, to be twisted.
The present invention provides a twisting tenser 10 of composite yarn Y, including elastic yarn y2, wherein the upper end 23 of a guide pipe 19 that engages the composite yarn Y has a rough surface 24. The rough surface 24 has a surface roughness of 4 µm to 15 µm Rmax, and is finished by blasting or formed by biscuit-firing.

Description

Field of the Invention
The present invention relates to a twisting tenser for composite yarn, including elastic yarn.
Background of the Invention
Twisting machines that actually twist yarn, such as double twisting machines, twist yarn by forcing it to be turned and folded back by means of the rotation of a spindle while applying an appropriate tension to the yarn using a tenser, followed by the winding of the yarn around a package. Yarn that is twisted includes not only cotton but also wool, acrylic, rayon, and polyester, which may be supplied as single yarn or combined into composite yarn, as appropriate.
If composite yarn of elastic yarn, such as polyurethane and cotton yarn, is supplied, the yarn is likely to be cut during the twisting process and, in particular, it is impossible to twist elastic yarn of a large yarn number (for example, 70 or 140 denier). This is because due to the fact that, although the upper end 2 of a tenser 1 that guides composite yarn Y to the lower part of the central shaft (a spindle shaft) is formed as a smooth surface (mirror surface finish), little resistance is provided to prevent damage to the composite yarn Y, and elastic yarn y1 may entwine around and adhere to the surface due to its higher viscosity and be delayed, compared to cotton yarn y2, in entering a shaft hole at the upper end 2 while being released (turned), resulting in yarn branching, as shown in Figure 4. Thus, there is a need for a twisting tenser that can smoothly twist the composite yarn Y, including thick elastic yarn y1.
Summary of the Invention
To solve these problems, this invention provides a twisting tenser for composite yarn, including elastic yarn, wherein the upper end of the tenser that engages the composite yarn has a rough surface. The rough surface preferably has a surface roughness of 4 µm to 15 µm Rmax. This configuration prevents elastic yarn from being delayed compared to the other yarn in entering the shaft hole at the upper end of the tenser, thereby preventing the yarn from branching or being cut. The rough surface is preferably finished by blasting (spraying solid metal or mineral or vegetable abrasive material onto a processed surface at a high speed to clean, polish, or harden the surface). Alternatively, the rough surface may be biscuit-fired. This configuration enables a desired rough surface to be formed easily and reliably.
Brief Description of the Drawing
Figure 1 is a side view of the integral part of an embodiment of a twisting tenser according to this invention.
Figure 2 is a schematic cross-sectional view of the upper end of a guide pipe in Figure 1.
Figure 3 is a side cross-sectional view of the overall double twisting machine in Figure 1.
Figure 4 is a side view showing a conventional twisting tenser.
Detailed Description of the preferred Embodiments
An embodiment of this invention is described with reference to the drawings.
Figures 1 and 3 show a twisting tenser 10 according to this invention provided in a double twisting machine 11. The double twisting machine 11 comprises a stationary cylinder 12 with a bottom for holding and accommodating a package P, spindle 13 provided on the bottom of the stationary cylinder 12, and a rotating disc 14 mounted on the spindle 13. The package P is formed as a package for composite yarn Y consisting of polyurethane yarn y1 which is elastic and cotton yarn y2. A shaft portion 15 of an appropriate height is provided at the bottom of the stationary cylinder 12 and coaxially fitted on an upper shaft 13a of a spindle 13 via a bearing 16, and a holder 17 is mounted at the upper end of the shaft portion to detachably hold the tenser 10 for twisting yarn.
A long narrow guide pipe 19 is provided at the upper part of the tenser 10 to guide the composite yarn Y to an urging member 18. A flyer 20 extending in the radial direction is provided on the guide pipe 19 via a holder section 21 in such a way as to rotate around the shaft. Thus, the composite yarn Y from the package P is guided by the flyer 20, which is turned in response to the release of the yarn Y, to enter the shaft hole 19a in the guide pipe 19, and is then guided to the upper shaft 13a of the spindle 13 while being subjected to an appropriate tension by the urging member 18 below the shaft hole 19a. The composite yarn Y, which has entered the shaft hole 19a in the spindle 13, exits the rotating disc 14 in the radial outward direction and is turned to form a balloon outside the stationary cylinder 12. It then passes through a guide member 22 provided above the twisting tenser 10 and is then wound by a take-up device (not shown in the drawings) into a predetermined shape.
The upper end 23 of the guide pipe 19 that constitutes the upper end of the tenser has a rough surface 24 with an appropriate surface roughness.
According to this embodiment, that section of the upper end 23 of the stainless-steel-plated guide pipe 19 that engages the composite yarn Y and is of a specified length (for example, 3 mm to 5 mm from the upper end) is finished by blasting from its outer circumferential surface through its round upper-end surface to its inner circumferential surface. Concretely, in case the guide pipe 19 has an outer diameter of about 8 mm and an inner diamter about 5 mm, its outer circumferential surface within about 5 mm from the top and its inner circumferential surface within 3 mm from the top are finished by blasting. Shots formed by crushing, such as a chilled cast-iron ball, are used as blast particles instead of sand. Unlike a rough surface obtained through the use of sandpaper, the rough surface 24 formed in this manner has a cross section in the form of relatively smooth and round waves (continuous circular arc), as shown schematically in Figure 2. Thus, there is little frictional resistance between this surface and the composite yarn Y, the surface is not damaged.
In addition, the surface roughness is greater than that of the conventional spectral finish. According to the JIS B 0601 "Surface Roughness" standard and classification, a normal spectral finish shall have a surface roughness of 3S or less, so the rough surface 24 has a surface roughness exceeding this value. That is, according to the standard, the interval (maximum height Rmax) between the two lines (25, 26) that sandwich a target portion and are parallel to the average height of the sampled portion having a reference length L (for example, 1 mm) is, for example, 4.0 µm or more, preferably 5.0 µm to 15.0 µm. When the guide pipe 19 is molded and the design standard of the finish surface of the upper end 23 must be indicated, for example, 12.5 S to 25 S (lower limit: 5 µm Rmax; upper limit: 25 µm Rmax), for example, is specified.
To mold the rough surface 24, a biscuit-fired ceramic guide (not shown in the drawings) having a shaft hole may be placed on the upper end of a metallic guide pipe without the use of shot blasting. That is, although in the normal manufacture of ceramics a base is formed into a hard product through two firing processes, the ceramic guide fitted on the upper end is obtained by firing the base into a porous state without final hardening. The surface of this biscuit is also a relatively smooth rough surface 24, as shown in Figure 2.
Since the upper end 23 of the guide pipe 19 is formed as a rough surface 24, for example, even polyurethane yarn y1 that is thick and viscous and has a fineness of 70 to 140 denier is subjected to reduced frictional resistance when entering the shaft hole 19a, and is prevented from adhering to the upper end 23 and being significantly delayed compared to the cotton yarn y2. Consequently, the yarn is prevented from branching or being cut (see Figure 1). That is, this invention enables the composite yarn Y, including elastic yarn y1, to be actually twisted in order to extend the applicable range of the yarn type and thickness, thereby improving the general versatility of the twisting tenser 10 and the double twisting machine 11.
In addition, this invention has a very simple configuration and can be easily applied to existing twisting machines and twisting tensers without an excessive increase in manufacturing costs. The shot-blasted or biscuit-fired ceramic guide can be used to easily and reliably form a preferable rough surface 24 with an appropriate surface roughness.
This invention is not limited to the combination of polyurethane yarn y1 and cotton yarn y2 as the composite yarn Y, but is useful for composite yarn Y that includes different elastic yarn.
In addition, the twisting tenser according to this invention is not limited to the double twisting machine 11 of the type shown in Figure 3, but is widely applicable to similar twisting apparatuses.
In summary, the inventions prevent the elastic yarn from being delayed compared to the other yarn in entering the shaft hole at the upper end of the tenser, thereby preventing the yarn from branching or being cut and enabling the composite yarn, including the elastic yarn, to be twisted.
The inventions enable the upper end of the tenser to be easily and reliably formed with the desired rough surface.
In combination with the rough surface, the invention provides a smaller contact area than a structure with a separate cap mounted on the guide pipe, thereby preventing the branching or cutting of the yarn caused by its adherence.
This invention can be easily applied to existing twisting machine or twisting tenser.

Claims (5)

  1. A twisting tenser comprising a long, narrow guide pipe that guides composite yarn, including elastic yarn, to an urging member, and a flyer that extends in the radial direction and can be rotated above the guide pipe around its axis, the tenser being coaxially fitted onto an upper shaft of a spindle, wherein the upper end of the tenser that engages said composite yarn has a rough surface.
  2. A twisting tenser according to claim 1 wherein said rough surface has a surface roughness of 4 to 15 µm Rmax.
  3. A twisting tenser according to claim 1 or 2 wherein said rough surface is finished by blasting.
  4. A twisting tenser according to claim 1 or 2 wherein said rough surface is formed by biscuit firing.
  5. A twisting tenser according to any one of claims 1 to 3 wherein said rough surface is formed by processing the upper end of said guide pipe.
EP97121097A 1996-12-16 1997-12-01 Twisting tenser Withdrawn EP0848093A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP335868/96 1996-12-16
JP8335868A JPH10168680A (en) 1996-12-16 1996-12-16 Tenser for twisting

Publications (2)

Publication Number Publication Date
EP0848093A2 true EP0848093A2 (en) 1998-06-17
EP0848093A3 EP0848093A3 (en) 1999-03-31

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ID=18293286

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Application Number Title Priority Date Filing Date
EP97121097A Withdrawn EP0848093A3 (en) 1996-12-16 1997-12-01 Twisting tenser

Country Status (4)

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EP (1) EP0848093A3 (en)
JP (1) JPH10168680A (en)
KR (1) KR100345640B1 (en)
CN (1) CN1185492A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008049825A1 (en) * 2006-10-26 2008-05-02 Oerlikon Textile Gmbh & Co. Kg Device for guiding or treating a multifilament thread and method for the production of a ceramic surface
CN103243420A (en) * 2013-05-24 2013-08-14 吴江金时利织造有限公司 Novel two-for-one twister yarn tension device and operating method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100566519B1 (en) * 2004-09-15 2006-03-31 최병호 a twisting apparatus of a compound yarn
ITMI20071578A1 (en) * 2007-08-01 2009-02-02 Savio Macchine Tessili Spa CONTROL AND REDUCTION DEVICE OF THE VOLTAGE PULSE IN THE FOUR-TWIST FOOD FEEDING

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH330776A (en) * 1954-07-01 1958-06-30 Deering Milliken Res Corp Tweezer for textile machine
US4028870A (en) * 1974-08-03 1977-06-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and device for preventing creation of fuzzy fibers of yarn during twisting operation of the multiple twister
EP0240566A1 (en) * 1985-10-15 1987-10-14 Murata Kikai Kabushiki Kaisha Tenser retracting structure for double twisting machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH330776A (en) * 1954-07-01 1958-06-30 Deering Milliken Res Corp Tweezer for textile machine
US4028870A (en) * 1974-08-03 1977-06-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and device for preventing creation of fuzzy fibers of yarn during twisting operation of the multiple twister
EP0240566A1 (en) * 1985-10-15 1987-10-14 Murata Kikai Kabushiki Kaisha Tenser retracting structure for double twisting machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008049825A1 (en) * 2006-10-26 2008-05-02 Oerlikon Textile Gmbh & Co. Kg Device for guiding or treating a multifilament thread and method for the production of a ceramic surface
CN103243420A (en) * 2013-05-24 2013-08-14 吴江金时利织造有限公司 Novel two-for-one twister yarn tension device and operating method
CN103243420B (en) * 2013-05-24 2015-05-20 吴江金时利织造有限公司 Novel two-for-one twister yarn tension device and operating method

Also Published As

Publication number Publication date
KR19980063527A (en) 1998-10-07
EP0848093A3 (en) 1999-03-31
KR100345640B1 (en) 2002-10-11
JPH10168680A (en) 1998-06-23
CN1185492A (en) 1998-06-24

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