WO2020045433A1 - False twister disc and false twister disc production method - Google Patents

False twister disc and false twister disc production method Download PDF

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Publication number
WO2020045433A1
WO2020045433A1 PCT/JP2019/033523 JP2019033523W WO2020045433A1 WO 2020045433 A1 WO2020045433 A1 WO 2020045433A1 JP 2019033523 W JP2019033523 W JP 2019033523W WO 2020045433 A1 WO2020045433 A1 WO 2020045433A1
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Prior art keywords
surface layer
disk
twisting machine
machine according
false twisting
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PCT/JP2019/033523
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French (fr)
Japanese (ja)
Inventor
浩 浜島
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京セラ株式会社
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Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Priority to JP2020539500A priority Critical patent/JP7062073B2/en
Publication of WO2020045433A1 publication Critical patent/WO2020045433A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • 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
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • 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
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements

Definitions

  • the present disclosure relates to a disk for a false twister and a method for manufacturing a disk for the false twister.
  • the disk for a false twisting machine includes a disk-shaped base portion and a surface layer portion located in an outer peripheral region of the base portion, and the surface layer portion is formed of a ceramic mainly containing an oxide of aluminum and titanium. Become.
  • the method of manufacturing a disk for a false twisting machine according to the present disclosure is configured such that, after forming the surface layer mainly containing an oxide of aluminum and titanium on the outer peripheral region of the base, the barrel is subjected to a barrel vibration process or a shot blast process. The surface layer is polished.
  • FIG. 1A is a perspective view
  • FIG. 2B is a cross-sectional view
  • FIG. 1C is a schematic view showing a state in which a yarn is twisted, showing an example of a false twister disk of the present disclosure.
  • . 2 is a photograph of the surface of the twisted portion of the false twister disk shown in FIG. 1 taken with a scanning electron microscope.
  • 1A is a schematic cross-sectional view of one example of a disk for a false twister according to the present disclosure
  • FIG. 1B is a schematic cross-sectional view of another example.
  • 1 is a schematic diagram of a false twister provided with a false twister disk of the present disclosure.
  • FIG. 1A and 1B show an example of a disk for a false twister of the present disclosure, wherein FIG. 1A is a perspective view, FIG. 1B is a cross-sectional view, and FIG. FIG. FIG. 2 is a schematic diagram of a false twister provided with the false twister disk of the present disclosure.
  • a disk 10 for a false twisting machine (hereinafter, simply referred to as a disk) shown in FIG. 1 includes a disk-shaped base 1 and a surface layer 2 located in an outer peripheral region of the base 1, and an axial center of the base 1. Is provided with a through-hole 3 penetrating from the front surface to the back surface.
  • the disk 10 has the shaft 4 shown in FIG. 2 inserted into the through hole 3 and fixed, and the disk 10 rotates with the rotation of the shaft 4.
  • the yarn S is pressed against the surface layer 2 of the disk 10 as shown in FIG.
  • a portion of the surface layer portion 2 that is in contact with the yarn S will be described as a twisted yarn portion surface 2a.
  • the yarn S is, for example, a fiber made of polyamide or polyester.
  • FIG. 1 shows an example in which the disk 10 has the through holes 3, the disk 10 may have any structure as long as it is fixed to the shaft body 4 in the false twisting machine 20. Not something.
  • the surface layer portion 2 is made of a ceramic mainly composed of oxides of aluminum and titanium. With such a configuration, the aggressiveness of the twisted yarn surface 2a on the yarn S is reduced, so that abrasion powder is less likely to be generated. Further, since shedding from the twisted yarn portion surface 2a caused by sliding contact with the yarn S is reduced, it can be used for a long period of time.
  • the false twisting machine disk is made of ceramics
  • the ceramics have excellent mechanical properties and therefore have excellent durability.
  • the yarn to be twisted must not be seriously damaged, and this damage can be determined by the size of abrasion powder generated at the time of twisting. Therefore, it is required that the disk for the false twisting machine has a small amount of abrasion powder generated at the time of twisting.
  • the surface layer 2 is made of ceramics mainly composed of an oxide of aluminum and titanium.
  • the false twister disk 10 made of is excellent in durability and can reduce abrasion powder generated when the yarn S is twisted.
  • the titanium oxide is preferably a titanium oxide having a composition formula of TiO 2-x (0 ⁇ x ⁇ 2), and the content of the titanium oxide in the total 100% by mass of the components constituting the surface layer portion 2 May be 2% by weight or more and 42% by weight or less.
  • Titanium oxide having a composition formula of TiO 2-x (0 ⁇ x ⁇ 2) can be identified by X-ray Photoelectron Spectroscopy (XPS), and when this titanium oxide is present, Has a peak of TiO 2-x (0 ⁇ x ⁇ 2) in a binding energy range of 456 to 462 eV.
  • XPS X-ray Photoelectron Spectroscopy
  • the surface layer portion 2 becomes semiconductive (the volume resistivity is, for example, (1 ⁇ 10 5 ⁇ ⁇ m or more and 1 ⁇ 10 8 ⁇ ⁇ m or less), and the static electricity generated even when the yarn S is repeatedly brought into sliding contact with the twisted yarn surface 2a can be quickly removed.
  • the amount of aluminum titanate that increases the residual stress on the twisted yarn portion surface 2a is small, and the content thereof is 1% by mass or less in the total 100% by mass of the components constituting the surface layer portion 2. Is also good.
  • the base 1 is made of, for example, ceramics containing aluminum oxide, silicon carbide, or aluminum nitride as a main component. Since ceramics containing the above components as main components have high thermal conductivity, heat generated by sliding contact between the yarn S and the surface layer portion 2 can be quickly released.
  • the main component in the ceramics refers to a component occupying 80% by mass or more of the total 100% by mass of the components constituting the ceramics.
  • a ceramic containing aluminum and titanium oxides as main components means that the sum of the content of aluminum converted to oxide (Al 2 O 3 ) and the content of titanium converted to oxide (TiO 2 ) is 80. It refers to ceramics that is at least mass%.
  • the base portion 1 may contain magnesium, silicon and calcium as components other than the main component as oxides.
  • both the base portion 1 and the surface portion 2 may contain iron and chromium as inevitable impurities, and the total content of iron and chromium in each portion may be 6000 mass ppm or less. .
  • the components may be identified by using an X-ray diffractometer and collating with a JCPDS card.
  • the content of the component is determined by determining the content of the metal element constituting the component by an X-ray fluorescence analyzer (XRF) or an ICP (Inductively Coupled Plasma) emission analyzer (ICP), and using an X-ray diffractometer. What is necessary is just to convert into the identified compound.
  • XRF X-ray fluorescence analyzer
  • ICP Inductively Coupled Plasma emission analyzer
  • the content of aluminum titanate may be determined using the Rietveld method.
  • the base portion 1 when the base portion 1 is made of a ceramic containing aluminum oxide as a main component, the base portion 1 is relatively easily processed into a desired shape as compared with a ceramic containing silicon carbide or aluminum nitride as a main component. It has the mechanical properties required for a low cost and is inexpensive. Among ceramics containing aluminum oxide as a main component, ceramics having a content of aluminum oxide of 99% by mass or more have excellent thermal conductivity.
  • the base 1 may be made of aluminum alloy, stainless steel (SUS) or bearing steel (SUJ) other than ceramics.
  • the arithmetic average roughness Ra of at least the twisted yarn surface 2a of the surface layer portion 2 may be 1 ⁇ m or more and 2 ⁇ m or less.
  • the cutting level difference R ⁇ c may be 1.5 ⁇ m or more and 4.5 ⁇ m or less.
  • twisting of the yarn S can be performed satisfactorily, and the area of a portion having a gentle shape in the twisted yarn portion surface 2a increases, thereby further suppressing generation of abrasion powder. can do.
  • the arithmetic average roughness Ra and the cutting level difference R ⁇ c can be measured by using a surface roughness measuring device (SURFEST: SV-2100, manufactured by Mitutoyo Corporation) in accordance with JIS B 0601-2001.
  • the measurement conditions may be as follows.
  • Curve correction Circle ⁇ Average line processing: OFF
  • the thickness of the surface layer portion 2 may be 50 ⁇ m or more.
  • the surface layer portion 2 can be used for a long time because the surface layer portion 2 is thick.
  • the thickness of the surface layer portion 2 may be 100 ⁇ m or less.
  • FIG. 2 is a photograph of the surface of the twisted portion of the false twister disk shown in FIG. 1 taken with a scanning electron microscope.
  • the surface 2 a of the surface of the twisted yarn portion may have an aggregate 11 in which a large number of granular materials are integrated and have a curved surface convex toward the outside, and an open pore 12. .
  • the diameter of the open pores 12 is, for example, not less than 4 ⁇ m and not more than 12 ⁇ m.
  • any one of the aggregates 11 may include a plurality of spherical particles 13a, 13b,... Having a diameter of 0.2 ⁇ m or more and 1 ⁇ m or less on a curved surface.
  • each top surface of the spherical particles 13a, 13b,... Becomes a part of the substantially twisted yarn portion surface 2a, so that between the curved surface of the aggregate 11 and the twisted yarn portion surface 2a. A minute space is created, and this space can suppress aggression to the yarn S.
  • any of the aggregates 11 may be provided with a plurality of concave streaks 14a, 14b,... Having adjacent intervals of 0.2 ⁇ m or more and 1 ⁇ m or less on a curved surface. With such a configuration, the curved surface of the aggregate 11 becomes a part of the substantial twisted portion surface 2a, and the streaks 14a, 14b,... Can be suppressed.
  • FIG. 3 shows a disk for a false twisting machine according to the present disclosure, wherein (a) is a schematic cross-sectional view of one example and (b) is a schematic cross-sectional view of another example.
  • the surface layer portion 2 includes a cavity 16 extending in the thickness direction from a concave portion 15 located on the surface of the base portion 1 facing the surface layer portion 2. It may be closed.
  • the concave portion 15 refers to an open pore or a void on a surface of the base portion 1 facing the surface layer portion 2. Before the surface layer portion 2 is formed, the surface on which the concave portion 15 is formed is the surface of the base portion 1. Part of.
  • the gap 16 does not communicate with the outside, and therefore cannot be removed by washing before forming the surface layer 2 and remains in the recess 15. Since the floating particles thus generated are not discharged from the surface layer portion 2 to the outside, the floating particles do not adhere to the yarn S.
  • the width of the gap 16 as viewed in cross section along the thickness direction of the surface layer portion 2 may be smaller on the twisted yarn portion surface 2a side of the surface layer portion 2 than on the concave portion 15 side of the base portion 1.
  • the section 2 may be composed of, for example, a plurality of surface layers 2A, 2B,.
  • FIG. 4 is a schematic diagram of a false twister using the false twister disk of the present disclosure.
  • the false twisting machine 20 shown in FIG. 4 includes a plurality of shafts 4 (4a, 4b, 4c) installed at predetermined intervals, and a disk 10 (10a, 10b, 10c) is mounted on these shafts 4a, 4b, 4c. ) Are located at predetermined intervals.
  • the disks 10a, 10b, and 10c are arranged so that at least some of them overlap when viewed from above.
  • the shafts 4a, 4b, and 4c are rotatably supported by the plate 5 disposed on the lower side.
  • the shafts 4a and 4b are attached to the belt 6 (6a), and the shafts 4b and 4c are attached to the belt 6 ( 6b). Further, the shaft body 4b is also connected to a drive belt 7 located below.
  • ⁇ Circle around (4) ⁇ At the uppermost part of the shaft body 4a, there is located a guide disk 8 to which the thread S comes into contact first.
  • the guide disk 8 may have the same shape as the disk 10. Further, a truncated cone-shaped knife edge disk 9 is located at a portion where the thread S comes into contact last.
  • the drive of the false twisting machine 20 is such that the shaft 4b is rotated by the drive source via the drive belt 7, and the shafts 4a and 4c are rotated by the belts 6a and 6b in the same direction as the rotation direction of the shaft 4b. With the rotation, the guide disk 8, disk 10 and knife edge disk 9 rotate. When the yarn S is run so as to be in sliding contact with each disk 10, the yarn S is twisted by the frictional force at the time of sliding contact with the disk 10.
  • the base portion is made of ceramics mainly containing aluminum oxide.
  • a main component of aluminum oxide powder, each powder of magnesium hydroxide, silicon oxide, and calcium carbonate, a dispersant for dispersing the aluminum oxide powder as needed, and an organic binder are mixed with a ball mill, a bead mill or a vibrator. It is wet-mixed by a mill to form a slurry.
  • the average particle diameter (D 50 ) of the aluminum oxide powder is 3 ⁇ m or less, preferably 1 ⁇ m or less, and the content of magnesium hydroxide powder in the total 100% by mass of the powder is 0.3 to 0.4% by mass.
  • the content of silicon oxide powder is 0.02 to 0.04% by mass, and the content of calcium carbonate powder is 0.045 to 0.055% by mass.
  • the wet mixing time is, for example, 40 to 50 hours.
  • the organic binder is, for example, paraffin wax, wax emulsion (wax + emulsifier), PVA (polyvinyl alcohol), PEG (polyethylene glycol), PEO (polyethylene oxide) and the like.
  • the granules are formed by a powder press molding method to obtain a disk-shaped formed body having through holes. Then, the obtained compact is fired at a temperature of 1600 ° C. or more and 1800 ° C. or less to obtain a sintered body.
  • the base portion can be obtained by grinding the sintered body with a grindstone provided with a diamond having a grain number of, for example, # 325 to form a convex curved outer peripheral surface.
  • melt particles obtained by spraying are sprayed onto the outer peripheral region of the base by spraying.
  • the average particle size of the molten particles is, for example, 4 ⁇ m or more and 12 ⁇ m or less.
  • a thermal spraying method for example, a gas powder method, a gas melting rod method, a gas deflagration method, a plasma method, or the like may be used.
  • the average particle size of the molten particles may be set to 4 ⁇ m or more and 10 ⁇ m or less, for example.
  • a plasma spraying method may be used, and the spraying time may be, for example, 10 minutes or more.
  • the disk of the present disclosure can be obtained by polishing the surface layer by barrel vibration processing or shot blast processing.
  • GC green silicon carbide abrasive
  • spraying by a spraying method can be obtained by repeating polishing.
  • the disk of the present disclosure obtained by the above-described manufacturing method has excellent durability and can reduce abrasion powder generated when twisting the yarn.
  • the false twister disc of the present embodiment has the same composition in the base portion and the surface layer portion. It may be configured integrally. That is, both the base portion and the surface layer portion may be ceramics mainly composed of oxides of aluminum and titanium, and may have no boundary portion between the base portion and the surface layer portion.
  • Base part 2 Surface part 2a: Twisted part surface 3: Through hole 4: Shaft 5: Plate 6: Belt 7: Drive belt 8: Guide disk 9: Knife edge disk 10: False twister disk 11: Coagulation Aggregate 12: open pores 13a, 13b: spherical particles 14a, 14b: streak 15: recess 16: void 20: false twister S: yarn

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The present disclosure provides a false twister disc comprising a discoid base and a surface layer located on the outer circumferential region of the base. The surface layer comprises a ceramic in which aluminum and titanium oxides are the main components. The present disclosure also provides a false twister disc production method wherein the surface layer, which has aluminum and titanium oxides as the main components, is formed on the outer circumferential region of the base, after which the surface layer is polished by barrel tumbling or shot blasting.

Description

仮撚機用ディスクおよび仮撚機用ディスクの製造方法Disk for false twister and method for manufacturing disk for false twister
　本開示は、仮撚機用ディスクおよび仮撚機用ディスクの製造方法に関する。 The present disclosure relates to a disk for a false twister and a method for manufacturing a disk for the false twister.
　従来、糸条に撚りを掛けるために、回転している複数の仮撚機用ディスクに接触させる方法が用いられている。そして、このような仮撚機用ディスクは、セラミックスからなることが知られている（特許文献１参照）。 Conventionally, in order to twist the yarn, a method of contacting a plurality of rotating false twister discs has been used. It is known that such a disk for a false twister is made of ceramics (see Patent Document 1).
特開平８－３３７９３６号公報JP-A-8-337936
　本開示の仮撚機用ディスクは、円盤状の基体部と、該基体部の外周領域に位置する表層部とを備え、該表層部は、アルミニウムおよびチタンの酸化物が主成分であるセラミックスからなる。 The disk for a false twisting machine according to the present disclosure includes a disk-shaped base portion and a surface layer portion located in an outer peripheral region of the base portion, and the surface layer portion is formed of a ceramic mainly containing an oxide of aluminum and titanium. Become.
　本開示の仮撚機用ディスクの製造方法は、前記基体部の外周領域に、アルミニウムおよびチタンの酸化物を主成分とする前記表層部を成膜した後、バレル振動処理またはショットブラスト処理によって前記表層部を研磨する。 The method of manufacturing a disk for a false twisting machine according to the present disclosure is configured such that, after forming the surface layer mainly containing an oxide of aluminum and titanium on the outer peripheral region of the base, the barrel is subjected to a barrel vibration process or a shot blast process. The surface layer is polished.
本開示の仮撚機用ディスクの一例を示す、（ａ）は斜視図であり、（ｂ）は断面図であり、（ｃ）は糸条に撚りを掛けている状態を表す概略図である。1A is a perspective view, FIG. 2B is a cross-sectional view, and FIG. 1C is a schematic view showing a state in which a yarn is twisted, showing an example of a false twister disk of the present disclosure. . 図１に示す仮撚機用ディスクの撚糸部表面を走査型電子顕微鏡を用いて撮影した写真である。2 is a photograph of the surface of the twisted portion of the false twister disk shown in FIG. 1 taken with a scanning electron microscope. 本開示の仮撚機用ディスクを示す、（ａ）は一例の模式的な断面図であり、（ｂ）は他の例の模式的な断面図である。1A is a schematic cross-sectional view of one example of a disk for a false twister according to the present disclosure, and FIG. 1B is a schematic cross-sectional view of another example. 本開示の仮撚機用ディスクを備える仮撚機の模式図である。1 is a schematic diagram of a false twister provided with a false twister disk of the present disclosure.
　以下、図面を参照して、本開示の仮撚機用ディスクの実施形態について詳細に説明する。図１は本開示の仮撚機用ディスクの一例を示す、（ａ）は斜視図であり、（ｂ）は断面図であり、（ｃ）は糸条に撚りを掛けている状態を表す概略図である。図２は、本開示の仮撚機用ディスクを備える仮撚機の模式図である。 Hereinafter, an embodiment of a disk for a false twister according to the present disclosure will be described in detail with reference to the drawings. 1A and 1B show an example of a disk for a false twister of the present disclosure, wherein FIG. 1A is a perspective view, FIG. 1B is a cross-sectional view, and FIG. FIG. FIG. 2 is a schematic diagram of a false twister provided with the false twister disk of the present disclosure.
　図１に示す仮撚機用ディスク１０（以下、単にディスクという。）は、円盤状の基体部１と、基体部１の外周領域に位置する表層部２とを備え、基体部１の軸心には、表面から裏面まで貫通する貫通孔３を備えている。 A disk 10 for a false twisting machine (hereinafter, simply referred to as a disk) shown in FIG. 1 includes a disk-shaped base 1 and a surface layer 2 located in an outer peripheral region of the base 1, and an axial center of the base 1. Is provided with a through-hole 3 penetrating from the front surface to the back surface.
　ディスク１０は、図２に示す軸体４が貫通孔３に挿通されて固定され、この軸体４の回転とともにディスク１０が回転するものである。そして、ディスク１０を用いて糸条Ｓに撚りを掛ける場合、図１（ｃ）に示すように、ディスク１０の表層部２に糸条Ｓが押し当てられる。なお、以下においては、表層部２のうち、糸条Ｓに接する部分を撚糸部表面２ａと記載して説明する。ここで、糸条Ｓは、例えば、ポリアミドあるいはポリエステルからなる繊維である。なお、図１においてディスク１０は、貫通孔３を備えている例を示したが、仮撚機２０において軸体４に固定されるものであればよく、必ずしも貫通孔３を備えていなければならないものではない。 The disk 10 has the shaft 4 shown in FIG. 2 inserted into the through hole 3 and fixed, and the disk 10 rotates with the rotation of the shaft 4. When twisting the yarn S using the disk 10, the yarn S is pressed against the surface layer 2 of the disk 10 as shown in FIG. In the following, a portion of the surface layer portion 2 that is in contact with the yarn S will be described as a twisted yarn portion surface 2a. Here, the yarn S is, for example, a fiber made of polyamide or polyester. Although FIG. 1 shows an example in which the disk 10 has the through holes 3, the disk 10 may have any structure as long as it is fixed to the shaft body 4 in the false twisting machine 20. Not something.
　ここで、表層部２は、アルミニウムおよびチタンの酸化物が主成分であるセラミックスからなる。このような構成であると、撚糸部表面２ａの糸条Ｓへの攻撃性が低減するので、摩耗粉が発生しにくくなる。また、糸条Ｓとの摺接によって生じる撚糸部表面２ａからの脱粒が減少するため、長期間に亘って用いることができる。 Here, the surface layer portion 2 is made of a ceramic mainly composed of oxides of aluminum and titanium. With such a configuration, the aggressiveness of the twisted yarn surface 2a on the yarn S is reduced, so that abrasion powder is less likely to be generated. Further, since shedding from the twisted yarn portion surface 2a caused by sliding contact with the yarn S is reduced, it can be used for a long period of time.
　仮撚機用ディスクがセラミックスからなる場合、セラミックスは機械的特性に優れるものであるために優れた耐久性を有する。しかしながら、優れた機械的特性によって、撚りの対象となる糸条に大きなダメージを与えるものであってはならず、このダメージは、撚りを掛ける際に生じる摩耗粉の大小で判断することができる。そのため、仮撚機用ディスクには、撚りを掛ける際に生じる摩耗粉が少ないことが求められており、本開示のような、表層部２が、アルミニウムおよびチタンの酸化物が主成分であるセラミックスからなる仮撚機用ディスク１０は、耐久性に優れているとともに、糸条Ｓに撚りを掛ける際に生じる摩耗粉を少なくすることができる。 場合 When the false twisting machine disk is made of ceramics, the ceramics have excellent mechanical properties and therefore have excellent durability. However, due to excellent mechanical properties, the yarn to be twisted must not be seriously damaged, and this damage can be determined by the size of abrasion powder generated at the time of twisting. Therefore, it is required that the disk for the false twisting machine has a small amount of abrasion powder generated at the time of twisting. As described in the present disclosure, the surface layer 2 is made of ceramics mainly composed of an oxide of aluminum and titanium. The false twister disk 10 made of is excellent in durability and can reduce abrasion powder generated when the yarn S is twisted.
　特に、チタンの酸化物は、組成式がＴｉＯ2-x（０＜ｘ＜２）として示される酸化チタンがよく、表層部２を構成する成分の合計１００質量％におけるチタンの酸化物の含有量は、２重量％以上４２重量％以下であってもよい。 In particular, the titanium oxide is preferably a titanium oxide having a composition formula of TiO 2-x (0 <x <2), and the content of the titanium oxide in the total 100% by mass of the components constituting the surface layer portion 2 May be 2% by weight or more and 42% by weight or less.
　組成式がＴｉＯ2-x（０＜ｘ＜２）として示される酸化チタンは、Ｘ線光電子分光法（ＸＰＳ；X-ray Photoelectron Spectroscopy）で同定することができ、この酸化チタンが存在する場合には、結合エネルギーが４５６～４６２ｅＶの範囲にＴｉＯ2-x（０＜ｘ＜２）のピークが存在する。 Titanium oxide having a composition formula of TiO 2-x (0 <x <2) can be identified by X-ray Photoelectron Spectroscopy (XPS), and when this titanium oxide is present, Has a peak of TiO 2-x (0 <x <2) in a binding energy range of 456 to 462 eV.
　組成式がＴｉＯ2-x（０＜ｘ＜２）として示される酸化チタンの含有量が２重量％以上４２重量％以下であると、表層部２は半導電性（体積抵抗率が、例えば、１×１０5Ω・ｍ以上１×１０8Ω・ｍ以下）を示し、糸条Ｓが繰り返して撚糸部表面２ａに摺接しても発生する静電気を速やかに除去することができる。 When the content of titanium oxide represented by the composition formula TiO 2-x (0 <x <2) is 2% by weight or more and 42% by weight or less, the surface layer portion 2 becomes semiconductive (the volume resistivity is, for example, (1 × 10 5 Ω · m or more and 1 × 10 8 Ω · m or less), and the static electricity generated even when the yarn S is repeatedly brought into sliding contact with the twisted yarn surface 2a can be quickly removed.
　また、撚糸部表面２ａにおける残留応力を大きくするチタン酸アルミニウムは少ない方が好適であり、その含有量は、表層部２を構成する成分の合計１００質量％のうち、１質量％以下であってもよい。 Further, it is preferable that the amount of aluminum titanate that increases the residual stress on the twisted yarn portion surface 2a is small, and the content thereof is 1% by mass or less in the total 100% by mass of the components constituting the surface layer portion 2. Is also good.
　そして、基体部１は、例えば、酸化アルミニウム、炭化珪素または窒化アルミニウムを主成分とするセラミックスからなる。上記成分を主成分とするセラミックスは、熱伝導率が高いため、糸条Ｓと表層部２との摺接により発生した熱を速やかに逃がすことができる。 The base 1 is made of, for example, ceramics containing aluminum oxide, silicon carbide, or aluminum nitride as a main component. Since ceramics containing the above components as main components have high thermal conductivity, heat generated by sliding contact between the yarn S and the surface layer portion 2 can be quickly released.
　ここで、セラミックスにおける主成分とは、セラミックスを構成する成分の合計１００質量％のうち、８０質量％以上を占める成分をいう。アルミニウムおよびチタンの酸化物が主成分であるセラミックスとは、アルミニウムを酸化物（Ａｌ2Ｏ3）に換算した含有量と、チタンを酸化物（ＴｉＯ2）に換算した含有量との合計が８０質量％以上であるセラミックスをいう。 Here, the main component in the ceramics refers to a component occupying 80% by mass or more of the total 100% by mass of the components constituting the ceramics. A ceramic containing aluminum and titanium oxides as main components means that the sum of the content of aluminum converted to oxide (Al 2 O 3 ) and the content of titanium converted to oxide (TiO 2 ) is 80. It refers to ceramics that is at least mass%.
　基体部１は、主成分以外の成分として、マグネシウム、珪素およびカルシウムを酸化物として含んでいてもよい。 The base portion 1 may contain magnesium, silicon and calcium as components other than the main component as oxides.
　また、基体部１および表層部２は、いずれも不可避不純物として、鉄およびクロムを含んでいてもよく、それぞれの部位における鉄およびクロムの含有量の合計は、６０００質量ｐｐｍ以下であってもよい。 Further, both the base portion 1 and the surface portion 2 may contain iron and chromium as inevitable impurities, and the total content of iron and chromium in each portion may be 6000 mass ppm or less. .
　なお、成分の特定にあたっては、Ｘ線回折装置を用いて、ＪＣＰＤＳカードと照合することによって同定すればよい。 成分 In specifying the components, the components may be identified by using an X-ray diffractometer and collating with a JCPDS card.
　また、成分の含有量は、該当成分を構成する金属元素の含有量を蛍光Ｘ線分析装置（ＸＲＦ）またはＩＣＰ（Inductively Coupled Plasma）発光分析装置（ＩＣＰ）で求め、Ｘ線回折装置を用いて同定された化合物に換算すればよい。 The content of the component is determined by determining the content of the metal element constituting the component by an X-ray fluorescence analyzer (XRF) or an ICP (Inductively Coupled Plasma) emission analyzer (ICP), and using an X-ray diffractometer. What is necessary is just to convert into the identified compound.
　なお、チタン酸アルミニウムの含有量については、リートベルト法を用いて求めればよい。 The content of aluminum titanate may be determined using the Rietveld method.
　ここで、基体部１が酸化アルミニウムを主成分とするセラミックスからなるときには、炭化珪素または窒化アルミニウムを主成分とするセラミックスに比べて、所望形状への加工が比較的容易でありつつ、基体部１に求められる機械的特性を有しており、かつ安価である。酸化アルミニウムを主成分とするセラミックスの中でも、酸化アルミニウムの含有量が９９質量％以上であるセラミックスからなるときには、熱伝導性に優れる。 Here, when the base portion 1 is made of a ceramic containing aluminum oxide as a main component, the base portion 1 is relatively easily processed into a desired shape as compared with a ceramic containing silicon carbide or aluminum nitride as a main component. It has the mechanical properties required for a low cost and is inexpensive. Among ceramics containing aluminum oxide as a main component, ceramics having a content of aluminum oxide of 99% by mass or more have excellent thermal conductivity.
　なお、基体部１は、セラミックス以外、アルミニウム合金、ステンレス鋼（ＳＵＳ）またはベアリング鋼（ＳＵＪ）から形成されていてもよい。 The base 1 may be made of aluminum alloy, stainless steel (SUS) or bearing steel (SUJ) other than ceramics.
　また、表層部２の少なくとも撚糸部表面２ａにおける算術平均粗さＲａは１μｍ以上２μｍ以下であってもよい。 算 Also, the arithmetic average roughness Ra of at least the twisted yarn surface 2a of the surface layer portion 2 may be 1 μm or more and 2 μm or less.
　算術平均粗さＲａが上記範囲であると、糸条Ｓの撚り掛けを良好に行えるとともに、撚糸部表面２ａにおける凹凸の凸部の形状が鋭利ではなくなだらかな形状となるので、さらに摩耗粉の発生を抑制することができる。 When the arithmetic average roughness Ra is within the above range, twisting of the yarn S can be performed well, and the shape of the projections of the unevenness on the surface 2a of the twisted yarn portion becomes not sharp but a gentle shape. Generation can be suppressed.
　また、表層部２の少なくとも撚糸部表面２ａの粗さ曲線における２５％の負荷長さ率での切断レベルと、粗さ曲線における７５％の負荷長さ率での切断レベルとの差を表す、切断レベル差Ｒδｃは１．５μｍ以上４．５μｍ以下であってもよい。 In addition, the difference between the cutting level at a load length ratio of 25% in the roughness curve of at least the surface 2a of the twisted yarn portion of the surface layer portion 2 and the cutting level at a load length ratio of 75% in the roughness curve is shown. The cutting level difference Rδc may be 1.5 μm or more and 4.5 μm or less.
　切断レベル差Ｒδｃが上記範囲であると、糸条Ｓの撚り掛けを良好に行えるとともに、撚糸部表面２ａ内でなだらかな形状となっている部分の面積が増えるので、さらに摩耗粉の発生を抑制することができる。 When the cutting level difference Rδc is within the above range, twisting of the yarn S can be performed satisfactorily, and the area of a portion having a gentle shape in the twisted yarn portion surface 2a increases, thereby further suppressing generation of abrasion powder. can do.
　算術平均粗さＲａおよび切断レベル差Ｒδｃは、ＪＩＳ　Ｂ　０６０１－２００１に準拠し、表面粗さ測定機（(株)ミツトヨ製、ＳＵＲＦＴＥＳＴ：ＳＶ－２１００）を用いて測定することができる。
測定条件としては、以下の通りとすればよい。
・フィルタ：ＧＡＵＳＳ
・λc：０．８ｍｍ
・λs：２．５ｍｍ
・測定方向：径方向
・測定長さ：５ｍｍ
・測定箇所：２箇所
・前走/後走：ＯＮ
・波形削除：ＯＦＦ
・曲線補正：円
・平均線処理：ＯＦＦ
　また、表層部２の厚みは５０μｍ以上であってもよい。 The arithmetic average roughness Ra and the cutting level difference Rδc can be measured by using a surface roughness measuring device (SURFEST: SV-2100, manufactured by Mitutoyo Corporation) in accordance with JIS B 0601-2001.
The measurement conditions may be as follows.
・ Filter: GAUSS
・ Λc: 0.8mm
・ Λs: 2.5mm
-Measuring direction: radial direction-Measuring length: 5 mm
・ Measurement points: 2 points ・ Previous / backward: ON
・ Delete waveform: OFF
・ Curve correction: Circle ・ Average line processing: OFF
Further, the thickness of the surface layer portion 2 may be 50 μm or more.
　表層部２の厚みが上記範囲であると、糸条Ｓが表層部２に繰り返し摺接しても、表層部２は厚いので長期間に亘って用いることができる。 と If the thickness of the surface layer portion 2 is within the above range, even if the yarn S repeatedly slides on the surface layer portion 2, the surface layer portion 2 can be used for a long time because the surface layer portion 2 is thick.
　また、製造効率の点から、表層部２の厚みは１００μｍ以下であってもよい。 From the viewpoint of manufacturing efficiency, the thickness of the surface layer portion 2 may be 100 µm or less.
　図２は、図１に示す仮撚機用ディスクの撚糸部表面を走査型電子顕微鏡を用いて撮影した写真である。 FIG. 2 is a photograph of the surface of the twisted portion of the false twister disk shown in FIG. 1 taken with a scanning electron microscope.
　図２に示すように、表層部の撚糸部表面２ａは、多数の粒状体が一体化し、外部に向かって凸状の曲面を有する凝集体１１と、開気孔１２とを有していてもよい。 As shown in FIG. 2, the surface 2 a of the surface of the twisted yarn portion may have an aggregate 11 in which a large number of granular materials are integrated and have a curved surface convex toward the outside, and an open pore 12. .
　このような凝集体１１を有することで、糸条Ｓへの直接的な攻撃性が抑制されるとともに、開気孔１２を有することで、発生した摩耗粉は撚糸部表面２ａ上に残らずに、開気孔１２の内部に取り込まれやすくなるので、摩耗粉を介した糸条Ｓへの攻撃性も抑制される。開気孔１２の直径は、例えば、４μｍ以上１２μｍ以下である。 By having such agglomerates 11, direct aggression to the yarn S is suppressed, and by having the open pores 12, the generated wear powder does not remain on the twisted yarn surface 2a. Since it becomes easy to be taken into the inside of the open pores 12, the aggressiveness to the yarn S via wear powder is also suppressed. The diameter of the open pores 12 is, for example, not less than 4 μm and not more than 12 μm.
　凝集体１１のいずれかは、直径が０．２μｍ以上１μｍ以下の球状粒子１３ａ、１３ｂ、・・・を曲面に複数備えていてもよい。このような構成であると、球状粒子１３ａ、１３ｂ、・・・の各頂面が実質的な撚糸部表面２ａの一部となるため、凝集体１１の曲面と撚糸部表面２ａとの間に微小な空間が生じ、この空間により糸条Ｓへの攻撃性を抑制することができる。 Any one of the aggregates 11 may include a plurality of spherical particles 13a, 13b,... Having a diameter of 0.2 μm or more and 1 μm or less on a curved surface. With such a configuration, each top surface of the spherical particles 13a, 13b,... Becomes a part of the substantially twisted yarn portion surface 2a, so that between the curved surface of the aggregate 11 and the twisted yarn portion surface 2a. A minute space is created, and this space can suppress aggression to the yarn S.
　凝集体１１のいずれかは、隣り合う間隔が０．２μｍ以上１μｍ以下の凹んだ筋１４ａ、１４ｂ、・・・を曲面に複数備えていてもよい。このような構成であると、凝集体１１の曲面が実質的な撚糸部表面２ａの一部となり、筋１４ａ、１４ｂ、・・・自体が微小な空間となって、糸条Ｓへの攻撃性を抑制することができる。 Any of the aggregates 11 may be provided with a plurality of concave streaks 14a, 14b,... Having adjacent intervals of 0.2 μm or more and 1 μm or less on a curved surface. With such a configuration, the curved surface of the aggregate 11 becomes a part of the substantial twisted portion surface 2a, and the streaks 14a, 14b,... Can be suppressed.
　図３は、本開示の仮撚機用ディスクを示す、（ａ）は一例の模式的な断面図であり、（ｂ）は他の例の模式的な断面図である。 3 shows a disk for a false twisting machine according to the present disclosure, wherein (a) is a schematic cross-sectional view of one example and (b) is a schematic cross-sectional view of another example.
　図３に示すように、表層部２は、基体部１の表層部２の対向面に位置する凹部１５から厚み方向に伸びる空隙部１６を備え、空隙部１６の先端は、表層部２内で閉塞されていてもよい。 As shown in FIG. 3, the surface layer portion 2 includes a cavity 16 extending in the thickness direction from a concave portion 15 located on the surface of the base portion 1 facing the surface layer portion 2. It may be closed.
　ここで、凹部１５とは、基体部１の表層部２との対向面における開気孔や空隙をいい、表層部２が形成される前においては、凹部１５を形成する表面は基体部１の表面の一部である。 Here, the concave portion 15 refers to an open pore or a void on a surface of the base portion 1 facing the surface layer portion 2. Before the surface layer portion 2 is formed, the surface on which the concave portion 15 is formed is the surface of the base portion 1. Part of.
　空隙部１６の先端は、表層部２内で閉塞されていると、空隙部１６が外部に連通しないため、表層部２を形成する前の洗浄で除去することができず、凹部１５内に残留した浮遊微粒子が表層部２から外部に向かって排出されることがないので、糸条Ｓにこの浮遊微粒子が付着することがない。 If the tip of the gap 16 is closed in the surface layer 2, the gap 16 does not communicate with the outside, and therefore cannot be removed by washing before forming the surface layer 2 and remains in the recess 15. Since the floating particles thus generated are not discharged from the surface layer portion 2 to the outside, the floating particles do not adhere to the yarn S.
　表層部２の厚み方向に沿って断面視した空隙部１６の幅は、基体部１の凹部１５側よりも表層部２の撚糸部表面２ａ側の方が狭くてもよい。このような構成であると、表層部２が糸条Ｓとの摺接により、厚みが減少して、空隙部１６の先端が開口したとしても、凹部１５側よりも撚糸部表面２ａ側の方の幅が広い場合に比べ、空隙部１６内にある浮遊微粒子が表層部２から外部に向かって排出されにくい。 幅 The width of the gap 16 as viewed in cross section along the thickness direction of the surface layer portion 2 may be smaller on the twisted yarn portion surface 2a side of the surface layer portion 2 than on the concave portion 15 side of the base portion 1. With such a configuration, even if the surface layer portion 2 is reduced in thickness by sliding contact with the yarn S and the tip of the void portion 16 is opened, the surface portion 2a is closer to the twisted yarn portion surface 2a than to the concave portion 15 side. The floating fine particles in the gap 16 are less likely to be discharged from the surface layer portion 2 to the outside as compared with the case where the width is wider.
　図３に示すように、先端が表層部２内で閉塞されている空隙部１６や基体部１の凹部１５側よりも表層部２の撚糸部表面２ａ側の方が狭い空隙部１６を備える表層部２は、例えば、複数の表層部２Ａ、２Ｂ・・・から構成されていてもよい。 As shown in FIG. 3, a surface layer having a void portion 16 whose tip is closed in the surface layer portion 2 and a void portion 16 in which the twisted yarn portion surface 2 a side of the surface layer portion 2 is narrower than the concave portion 15 side of the base portion 1. The section 2 may be composed of, for example, a plurality of surface layers 2A, 2B,.
　図４は、本開示の仮撚機用ディスクを用いた仮撚機の模式図である。 FIG. 4 is a schematic diagram of a false twister using the false twister disk of the present disclosure.
　図４に示す仮撚機２０は、所定の間隔で設置された複数の軸体４（４ａ、４ｂ、４ｃ）を備え、これらの軸体４ａ、４ｂ、４ｃにディスク１０（１０ａ、１０ｂ、１０ｃ）が所定の間隔で位置している。なお、ディスク１０ａ、１０ｂ、１０ｃは、上面視において、少なくとも一部が重なり合うように配置される。そして、軸体４ａ、４ｂ、４ｃは、下側に配置されたプレート５に回転可能に支持され、軸体４ａ、４ｂは、ベルト６（６ａ）に、軸体４ｂ、４ｃは、ベルト６（６ｂ）に連結されている。また、軸体４ｂは、下方に位置する駆動ベルト７にも連結されている。 The false twisting machine 20 shown in FIG. 4 includes a plurality of shafts 4 (4a, 4b, 4c) installed at predetermined intervals, and a disk 10 (10a, 10b, 10c) is mounted on these shafts 4a, 4b, 4c. ) Are located at predetermined intervals. The disks 10a, 10b, and 10c are arranged so that at least some of them overlap when viewed from above. The shafts 4a, 4b, and 4c are rotatably supported by the plate 5 disposed on the lower side. The shafts 4a and 4b are attached to the belt 6 (6a), and the shafts 4b and 4c are attached to the belt 6 ( 6b). Further, the shaft body 4b is also connected to a drive belt 7 located below.
　また、軸体４ａの最上部には、糸条Ｓが最初に接することとなるガイドディスク８が位置する。ガイドディスク８はディスク１０と同一形状であってもよい。また、糸条Ｓが最後に接する部分には、円錐台状のナイフエッジディスク９が位置する。 {Circle around (4)} At the uppermost part of the shaft body 4a, there is located a guide disk 8 to which the thread S comes into contact first. The guide disk 8 may have the same shape as the disk 10. Further, a truncated cone-shaped knife edge disk 9 is located at a portion where the thread S comes into contact last.
　仮撚機２０の駆動は、駆動源により駆動ベルト７を介して軸体４ｂが回転し、ベルト６ａ、６ｂにより、軸体４ａ、４ｃが軸体４ｂの回転方向と同じ方向に回転し、この回転に伴い、ガイドディスク８、ディスク１０およびナイフエッジディスク９が回転する。そして各ディスク１０と摺接するように糸条Ｓを走行させると、糸条Ｓはディスク１０との摺接時の摩擦力によって撚りが与えられる。 The drive of the false twisting machine 20 is such that the shaft 4b is rotated by the drive source via the drive belt 7, and the shafts 4a and 4c are rotated by the belts 6a and 6b in the same direction as the rotation direction of the shaft 4b. With the rotation, the guide disk 8, disk 10 and knife edge disk 9 rotate. When the yarn S is run so as to be in sliding contact with each disk 10, the yarn S is twisted by the frictional force at the time of sliding contact with the disk 10.
　次に、本開示の仮撚機用ディスクの製造方法の一例として、基体部が酸化アルミニウムを主成分とするセラミックスからなる場合について説明する。 Next, as an example of a method of manufacturing a disk for a false twisting machine according to the present disclosure, a case where the base portion is made of ceramics mainly containing aluminum oxide will be described.
　まず、主成分である酸化アルミニウム粉末と、水酸化マグネシウム、酸化珪素および炭酸カルシウムの各粉末と、必要に応じて酸化アルミニウム粉末を分散させる分散剤と、有機結合剤とを、ボールミル、ビーズミルまたは振動ミルにより湿式混合してスラリーとする。 First, a main component of aluminum oxide powder, each powder of magnesium hydroxide, silicon oxide, and calcium carbonate, a dispersant for dispersing the aluminum oxide powder as needed, and an organic binder are mixed with a ball mill, a bead mill or a vibrator. It is wet-mixed by a mill to form a slurry.
　ここで、酸化アルミニウム粉末の平均粒径（Ｄ50）は３μｍ以下、好ましくは１μｍ以下であり、上記粉末の合計１００質量％における水酸化マグネシウム粉末の含有量は０．３～０．４質量％、酸化珪素粉末の含有量は０．０２～０．０４質量％、炭酸カルシウム粉末の含有量は０．０４５～０．０５５質量％である。 Here, the average particle diameter (D 50 ) of the aluminum oxide powder is 3 μm or less, preferably 1 μm or less, and the content of magnesium hydroxide powder in the total 100% by mass of the powder is 0.3 to 0.4% by mass. The content of silicon oxide powder is 0.02 to 0.04% by mass, and the content of calcium carbonate powder is 0.045 to 0.055% by mass.
　湿式混合する時間は、例えば、４０～５０時間である。また、有機結合剤は、例えば、パラフィンワックス、ワックスエマルジョン（ワックス＋乳化剤）、ＰＶＡ（ポリビニールアルコール）、ＰＥＧ（ポリエチレングリコール）、ＰＥＯ（ポリエチレンオキサイド）等である。 The wet mixing time is, for example, 40 to 50 hours. The organic binder is, for example, paraffin wax, wax emulsion (wax + emulsifier), PVA (polyvinyl alcohol), PEG (polyethylene glycol), PEO (polyethylene oxide) and the like.
　次に、上述した方法によって得たスラリーを噴霧造粒して顆粒を得た後、この顆粒を粉末プレス成形法により、成形することで貫通孔を備えた円板状の成形体を得る。その後、得られた成形体を１６００℃以上１８００℃以下の温度で焼成して焼結体を得る。 Next, after the slurry obtained by the above-described method is spray-granulated to obtain granules, the granules are formed by a powder press molding method to obtain a disk-shaped formed body having through holes. Then, the obtained compact is fired at a temperature of 1600 ° C. or more and 1800 ° C. or less to obtain a sintered body.
　次に、粒度番号が、例えば、＃３２５のダイヤモンドを備えた砥石で焼結体を研削加工することにより凸曲面状である外周面を形成することにより、基体部を得ることができる。 Next, the base portion can be obtained by grinding the sintered body with a grindstone provided with a diamond having a grain number of, for example, # 325 to form a convex curved outer peripheral surface.
　次に、表層部を得る製造方法について説明する。 Next, a manufacturing method for obtaining the surface layer will be described.
　表層部を得るには、まず、酸化アルミニウム粉末および酸化チタン粉末を混合、溶融粉砕して得られる溶融粒子を溶射法により基体部の外周領域に吹き付けることによって形成する。溶融粒子の平均粒径は、例えば、４μｍ以上１２μｍ以下とする。溶射法は、例えば、ガス粉末式、ガス溶棒式、ガス爆燃式あるいはプラズマ式等を用いればよい。 (1) In order to obtain the surface layer, first, aluminum oxide powder and titanium oxide powder are mixed, melt-pulverized, and melt particles obtained by spraying are sprayed onto the outer peripheral region of the base by spraying. The average particle size of the molten particles is, for example, 4 μm or more and 12 μm or less. As the thermal spraying method, for example, a gas powder method, a gas melting rod method, a gas deflagration method, a plasma method, or the like may be used.
　ここで、撚糸部表面における算術平均粗さＲａが１μｍ以上２μｍ以下であるディスクを得るには、溶融粒子の平均粒径を、例えば、４μｍ以上１０μｍ以下にすればよい。 Here, in order to obtain a disk in which the arithmetic average roughness Ra on the surface of the twisted portion is 1 μm or more and 2 μm or less, the average particle size of the molten particles may be set to 4 μm or more and 10 μm or less, for example.
　また、表層部の厚みが５０μｍ以上であるディスクを得るには、プラズマ式の溶射法を用い、溶射時間を、例えば、１０分以上とすればよい。 デ ィ ス ク In addition, in order to obtain a disk having a surface layer thickness of 50 μm or more, a plasma spraying method may be used, and the spraying time may be, for example, 10 minutes or more.
　そして、バレル振動処理またはショットブラスト処理によって表層部を研磨することによって本開示のディスクを得ることができる。 デ ィ ス ク Then, the disk of the present disclosure can be obtained by polishing the surface layer by barrel vibration processing or shot blast processing.
　また、撚糸部表面における算術平均粗さＲａが１μｍ以上２μｍ以下であるディスクをバレル振動処理によって得るには、粒度番号がＦ２２０、Ｆ２３０またはＦ２４０であるＧＣ（緑色炭化珪素研磨材）と酸化アルミニウムからなるメディアとを用い、焼結体とともにバレルに投入して、１２時間以上１４時間以下にわたって振動を付与すればよい。 In addition, in order to obtain a disk having an arithmetic average roughness Ra of 1 μm or more and 2 μm or less on the surface of the twisted yarn portion by barrel vibration processing, it is necessary to use GC (green silicon carbide abrasive) having a particle size number of F220, F230 or F240 and aluminum oxide. What is necessary is just to put into a barrel together with a sintered compact using a medium which becomes, and to apply vibration for 12 to 14 hours.
　また、先端が表層部内で閉塞されている空隙部や基体部の凹部側よりも表層部の撚糸部表面側の方が狭い空隙部を備える表層部を得る場合には、例えば、溶射法による吹き付け、研磨を繰り返すことによって得ることができる。 Further, when obtaining a surface layer portion having a void portion whose front end is narrower on the surface side of the twisted yarn portion than on the concave portion side of the void portion or the concave portion of the base portion which is closed in the surface layer portion, for example, spraying by a spraying method Can be obtained by repeating polishing.
　上述した製造方法によって得られる本開示のディスクは、耐久性に優れているとともに、糸条に撚りを掛ける際に生じる摩耗粉を少なくすることができる。 デ ィ ス ク The disk of the present disclosure obtained by the above-described manufacturing method has excellent durability and can reduce abrasion powder generated when twisting the yarn.
　以上、本開示に係る実施形態について例示したが、本開示は上述した実施形態に限定されるものではなく、本開示の要旨を逸脱しない限り任意のものとすることができることはいうまでもない。 Although the embodiment according to the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment, and it goes without saying that the present disclosure may be arbitrary without departing from the gist of the present disclosure.
　例えば、上述した実施形態では、基体部の表面上に別途、表層部を設けた場合を例にとって説明したが、本実施形態の仮撚機用ディスクは、基体部と表層部とが同じ組成で一体的に構成されたものであってもよい。つまり、基体部も表層部も、アルミニウムおよびチタンの酸化物が主成分であるセラミックスであり、基体部と表層部との境界部がないものであってもよい。 For example, in the above-described embodiment, the case where a surface layer portion is separately provided on the surface of the base portion has been described as an example, but the false twister disc of the present embodiment has the same composition in the base portion and the surface layer portion. It may be configured integrally. That is, both the base portion and the surface layer portion may be ceramics mainly composed of oxides of aluminum and titanium, and may have no boundary portion between the base portion and the surface layer portion.
１：基体部
２：表層部
２ａ：撚糸部表面
３：貫通孔
４：軸体
５：プレート
６：ベルト
７：駆動ベルト
８：ガイドディスク
９：ナイフエッジディスク
１０：仮撚機用ディスク
１１：凝集体
１２：開気孔
１３ａ、１３ｂ：球状粒子
１４ａ、１４ｂ：筋
１５：凹部
１６：空隙部
２０：仮撚機
Ｓ：糸条 1: Base part 2: Surface part 2a: Twisted part surface 3: Through hole 4: Shaft 5: Plate 6: Belt 7: Drive belt 8: Guide disk 9: Knife edge disk 10: False twister disk 11: Coagulation Aggregate 12: open pores 13a, 13b: spherical particles 14a, 14b: streak 15: recess 16: void 20: false twister S: yarn

Claims (10)

  1. 円盤状の基体部と、該基体部の外周領域に位置する表層部とを備え、該表層部は、アルミニウムおよびチタンの酸化物が主成分であるセラミックスからなる仮撚機用ディスク。 A disk for a false twister, comprising: a disk-shaped base portion; and a surface portion located in an outer peripheral region of the base portion, wherein the surface layer portion is made of ceramics mainly containing oxides of aluminum and titanium.
  2. 前記表層部の少なくとも撚糸部表面における算術平均粗さＲａは１μｍ以上２μｍ以下である、請求項１に記載の仮撚機用ディスク。 The disk for a false twisting machine according to claim 1, wherein the arithmetic average roughness Ra on at least the surface of the twisted portion of the surface layer portion is 1 m or more and 2 m or less.
  3. 前記表層部の少なくとも撚糸部表面の粗さ曲線における２５％の負荷長さ率での切断レベルと、前記粗さ曲線における７５％の負荷長さ率での切断レベルとの差を表す、切断レベル差Ｒδｃは１．５μｍ以上４．５μｍ以下である、請求項１または請求項２に記載の仮撚機用ディスク。 A cutting level representing a difference between a cutting level at a load length ratio of 25% in a roughness curve of at least the surface of the twisted portion of the surface layer portion and a cutting level at a load length ratio of 75% in the roughness curve. The disk for a false twisting machine according to claim 1, wherein the difference Rδc is 1.5 μm or more and 4.5 μm or less.
  4. 前記表層部の厚みは５０μｍ以上である、請求項１乃至請求項３のいずれかに記載の仮撚機用ディスク。 4. The false twister disc according to claim 1, wherein the thickness of the surface layer is 50 μm or more.
  5. 前記表層部の撚糸部表面は、多数の粒状体が一体化し、外部に向かって凸状の曲面を有する凝集体と、開気孔とを有する請求項１乃至請求項４のいずれかに記載の仮撚機用ディスク。 The temporary yarn according to any one of claims 1 to 4, wherein the surface of the twisted portion of the surface layer portion has an aggregate in which a large number of granular materials are integrated and has a curved surface convex toward the outside, and an open pore. Disc for twisting machine.
  6. 前記凝集体のいずれかは、直径が０．２μｍ以上１μｍ以下の球状粒子を前記曲面に複数備えている請求項５に記載の仮撚機用ディスク。 The disk for a false twisting machine according to claim 5, wherein any one of the aggregates has a plurality of spherical particles having a diameter of 0.2 µm or more and 1 µm or less on the curved surface.
  7. 前記凝集体のいずれかは、隣り合う間隔が０．２μｍ以上１μｍ以下の凹んだ筋を前記曲面に複数備えている請求項５または請求項６に記載の仮撚機用ディスク。 The disk for a false twisting machine according to claim 5, wherein one of the aggregates includes a plurality of concave streaks having an interval of 0.2 μm or more and 1 μm or less on the curved surface.
  8. 前記表層部は、前記基体部の前記表層部との対向面に位置する凹部から厚み方向に伸びる空隙部を備え、前記空隙部の先端は、前記表層部内で閉塞されている、請求項１乃至請求項７のいずれかに記載の仮撚機用ディスク。 The said surface layer part is provided with the space | gap part extended in the thickness direction from the recessed part located in the surface facing the said surface layer part of the said base | substrate part, The front-end | tip of the said space part is closed in the said surface layer part, The claim 1 thru | or The disk for a false twisting machine according to claim 7.
  9. 前記表層部の厚み方向に沿って断面視した前記空隙部の幅は、前記基体部の凹部側よりも前記表層部の撚糸部表面側の方が狭い、請求項８に記載の仮撚機用ディスク。 9. The false twisting machine according to claim 8, wherein a width of the gap portion viewed in a cross section along a thickness direction of the surface layer portion is narrower on a surface of the twisted yarn portion of the surface layer portion than on a concave side of the base portion. 10. disk.
  10. 請求項１乃至請求項９のいずれかに記載の仮撚機用ディスクの製造方法であって、前記基体部の外周領域に、アルミニウムおよびチタンの酸化物を主成分とする前記表層部を成膜した後、バレル振動処理またはショットブラスト処理によって前記表層部を研磨する、仮撚機用ディスクの製造方法。 The method for manufacturing a disk for a false twisting machine according to any one of claims 1 to 9, wherein the surface layer mainly composed of an oxide of aluminum and titanium is formed in a peripheral region of the base. And then polishing the surface layer by a barrel vibration process or a shot blast process.
PCT/JP2019/033523 2018-08-30 2019-08-27 False twister disc and false twister disc production method WO2020045433A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54150542U (en) * 1978-03-31 1979-10-19
JPS5522023A (en) * 1978-07-27 1980-02-16 Ishikawa Seisakusho Kk False twisting element for abrasion false twisting
JPS61194233A (en) * 1985-02-22 1986-08-28 ユニチカ株式会社 Production of false twisted yarn having hair
JPS63211334A (en) * 1987-02-26 1988-09-02 京セラ株式会社 Friction disc
JPH04123272U (en) * 1991-04-19 1992-11-06 京セラ株式会社 false twist disc
JPH0841742A (en) * 1994-07-29 1996-02-13 Kyocera Corp Friction disc
JPH09256232A (en) * 1996-03-21 1997-09-30 Chichibu Onoda Cement Corp False-twisting disk

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54150542U (en) * 1978-03-31 1979-10-19
JPS5522023A (en) * 1978-07-27 1980-02-16 Ishikawa Seisakusho Kk False twisting element for abrasion false twisting
JPS61194233A (en) * 1985-02-22 1986-08-28 ユニチカ株式会社 Production of false twisted yarn having hair
JPS63211334A (en) * 1987-02-26 1988-09-02 京セラ株式会社 Friction disc
JPH04123272U (en) * 1991-04-19 1992-11-06 京セラ株式会社 false twist disc
JPH0841742A (en) * 1994-07-29 1996-02-13 Kyocera Corp Friction disc
JPH09256232A (en) * 1996-03-21 1997-09-30 Chichibu Onoda Cement Corp False-twisting disk

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