EP2871270B1 - Rouleau de filature - Google Patents

Rouleau de filature Download PDF

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Publication number
EP2871270B1
EP2871270B1 EP13812558.8A EP13812558A EP2871270B1 EP 2871270 B1 EP2871270 B1 EP 2871270B1 EP 13812558 A EP13812558 A EP 13812558A EP 2871270 B1 EP2871270 B1 EP 2871270B1
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EP
European Patent Office
Prior art keywords
rubber layer
layer
rubber
roller
thickness
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Active
Application number
EP13812558.8A
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German (de)
English (en)
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EP2871270A1 (fr
EP2871270A4 (fr
Inventor
Yu Onodera
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.)
Yamauchi Corp
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Yamauchi Corp
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Publication date
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Publication of EP2871270A1 publication Critical patent/EP2871270A1/fr
Publication of EP2871270A4 publication Critical patent/EP2871270A4/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D01H5/80—Rollers or roller bearings with covers; Cots or covers

Definitions

  • the present invention relates to a spinning roller used in processes in spinning such as combing, drawing, roving, and spinning.
  • a conventionally known spinning roller comprises: a pipe configured to have an arbor inserted therein; and a cylindrical elastic layer adhering to the external surface of the pipe.
  • the external surface of a spinning roller becomes worn with use.
  • the hardness of the rubber that forms the roller surface is preferably made higher.
  • the ability of the roller to hold a fibre bundle would degrade and the yarn may become uneven. That is, it is not easy to ensure the ability of the roller to hold a fibre bundle, while also suppressing wear of the external surface of the roller.
  • the elastic layers for spinning rollers proposed in Patent Literatures 1 and 2 both have a double-layer structure including a first rubber layer (inner layer) and a second rubber layer (outer layer), the hardness of the first rubber layer set lower than the hardness of the second rubber layer. Since the relatively soft first rubber layer is provided as the inner layer, the apparent hardness of the roller surface becomes lower, making it easier for the respective rollers to ensure the ability to hold a fibre bundle. On the other hand, since the second rubber layer having a higher hardness than the first rubber layer is provided as the outer layer in the elastic layer, wear of the roller surface is suppressed.
  • nip width is produced when, for example, the roller is pressed against a flat surface.
  • the present inventors found that, even among the spinning rollers in which the respective outer layers were of the same material and the respective roller surfaces were of the same apparent hardness, there was a significant difference in their nip widths; and that when the nip width became wider, the ability of the roller to hold a fibre bundle improved. Based on the above findings, the present inventors were able to complete the present invention.
  • one aspect of the present invention relates to a spinning roller comprising:
  • a spinning roller capable of producing a wide nip width and excellent in the ability to hold a fibre bundle.
  • a spinning roller is used for a drafting mechanism in which a fibre bundle is stretched in processes such as combing, drawing, roving, and spinning. Since a fibre bundle tends to come in local contact with the external surface of a spinning roller, the surface of a spinning roller preferably has high resistance against wear. On the other hand, to suppress varied thickness and fuzzing of a fibre bundle as well as to produce a final yarn product of consistent quality, a spinning roller needs to be capable of producing a sufficient nip width to be able to firmly hold a fibre bundle and press a sufficient area of the fibre bundle.
  • a spinning roller according to the present invention has a cylindrical pipe and an elastic layer fixed to the external surface of the pipe.
  • the elastic layer has a first rubber layer on the inner side and a second rubber layer on the outer side fixed to the first rubber layer.
  • the hardness of the first rubber layer is 30° to 38° and the hardness of the second rubber layer is 60° or more.
  • the thickness of the elastic layer is set to 3 to 20 mm. Since the hardnesses of the two rubber layers and the thickness of the elastic layer are set as above, the spinning roller has high resistance against wear.
  • the nip width or the ability of the roller to hold a fibre bundle greatly depends on the relative relation between the thickness of the first rubber layer (inner layer) and the thickness of the second rubber layer (outer layer). Therefore, for the spinning roller according to the present invention, the ratio of a thickness T 2 of the second rubber layer to a thickness T 1 of the first rubber layer: T 2 /T 1 is set to 1/1 to 1/10.
  • the elastic layer can be moderately deformed, a wide nip width can be produced, and as a result, the roller becomes excellent in the ability to hold a fibre bundle.
  • the rubber hardness is in compliance with JIS-K6253 (Type A durometer hardness).
  • the hardness of the first rubber layer is 30° to 38° and the hardness of the second rubber layer may preferably be 65° to 73°.
  • the thickness T 1 of the first rubber layer is preferably 1.5 to 10 mm for example. Since the thickness is in the above range, the effect of the first rubber layer with relatively low hardness is sufficiently ensured; and therefore, a wide nip width can be produced more easily.
  • the thickness of the elastic layer (total of the first rubber layer and the second rubber layer) is 3 to 20 mm. Since the thickness is in the above range, a wide nip width can be produced more easily, and also, the quality of the roller becomes consistent.
  • the ratio T 2 /T 1 is preferably 1/1 to 1/6 and further preferably 1/3 to 1/6. Since the ratio T 2 /T 1 is in the above range, the effect of the first rubber layer with relatively low hardness is sufficiently ensured; and therefore, a wide nip width can be produced more easily.
  • a cylindrical arbor is inserted in the hollow of the cylindrical pipe. Since the elastic layer including the first rubber layer 4 and the second rubber layer 6 is formed as an organized integral part on the external surface of the pipe 2 in which the arbor is inserted, when the elastic layer becomes worn, the spinning roller can be removed from the arbor and easily replaced. If the first rubber layer directly adheres to the external surface of the arbor, when the elastic layer needs to be replaced, considerable time and effort would be required to detach the elastic layer from the external surface of the arbor and then replace it with another one.
  • Fig. 1 is an oblique view of a spinning roller according to the present embodiment, with an arbor pressed therein.
  • Fig. 2 is a sectional view of the spinning roller.
  • a spinning roller 1 comprises: a cylindrical pipe 2; a first adhesive layer 3 formed on the external surface of the pipe 2; a first rubber layer 4 fixed to the external side of the pipe 2 via the first adhesive layer 3; a second adhesive layer 5 formed on the external surface of the first rubber layer 4; and a second rubber layer 6 fixed to the external side of the first rubber layer 4 via the second adhesive layer 5. That is, the first rubber layer 4 and the second rubber layer 6 form an elastic layer.
  • the cylindrical pipe 2 can be made of metal or synthetic resin.
  • the cylindrical pipe 2 is preferably made of aluminum for example, because it is lightweight and excellent in the ability to hold the inserted arbor.
  • the inner diameter of the pipe 2 is not particularly limited, and is 10 to 50 mm for example.
  • the first adhesive layer 3 and the second adhesive layer 5 are not mandatory.
  • the first rubber layer 4 can be directly bonded to the pipe 2.
  • the second rubber layer 6 can be directly bonded to the first rubber layer 4, without the second adhesive layer 5 provided therebetween.
  • the first adhesive layer 3 can be of, for example, a one-part adhesive suited for bonding rubber and metal, or, a two-part adhesive that uses a primer (undercoat) and a topcoat to enable strong adhesion.
  • the second adhesive layer 5 can be of, for example, a polyolefin-based adhesive or a phenolic resin-based adhesive.
  • the respective rubber materials for forming the first rubber layer 4 and the second rubber layer 6 may be solid rubber or sponge rubber.
  • the respective rubber materials include, but are not limited to, nitrile rubber (NBR), natural rubber (NR), styrene-butadiene rubber (SBR), butadiene rubber (BR), and butyl rubber (IIR).
  • NBR nitrile rubber
  • NR natural rubber
  • SBR styrene-butadiene rubber
  • BR butadiene rubber
  • IIR butyl rubber
  • the rubber material for forming the first rubber layer 4 and the rubber material for forming the second rubber layer 6 may be the same or be different. Among these, NBR is preferred because it has excellent oil resistance and can easily suppress electrostatic charge of a fibre bundle.
  • the rubber layers used for the spinning roller contains relatively large amounts of sulfur as a vulcanizing agent.
  • the sulfur content in the second rubber layer 6 is preferably 3 to 10 mass%.
  • the hardness of the first rubber layer 4 is required to be 30° to 38°, and preferably about 35°, for example. If the hardness of the first rubber layer 4 is less than 30°, since the layer would become too soft, the ability of the roller to hold a fibre bundle would degrade. Moreover, since the first rubber layer would easily deform and thus cause the nip width to become too wide, the spinning roller may come in contact with an adjacent apron band and thus inhibit rotations of both the roller and the band.
  • the hardness of the second rubber layer 6 is required to be 60° or more; and is preferably 65° to 95°, further preferably 65° to 73°, and utmost preferably about 70° for example. If the hardness of the second rubber layer 6 is less than 60°, the second rubber layer 6 would become greatly worn and it would be difficult to conduct spinning with consistency. If the hardness of the second rubber layer 6 is more than 95°, it would be difficult to widen the nip width.
  • the thickness of the elastic layer (total of a thickness T 1 of the first rubber layer 4 and a thickness T2 of the second rubber layer 6) is required to be 3 to 20 mm and preferably 3 to 12 mm, for example. If the thickness of the elastic layer is less than 3 mm, since the second rubber layer 6 would become considerably thin, the quality of the roller would become inconsistent. Moreover, only a slight wear of the second rubber layer 6 due to use would cause the apparent hardness to sharply decline or to become difficult to control. On the other hand, if the thickness of the elastic layer is more than 20 mm, the spinning roller would become large in size and may become unsuited for operation in a common spinning machine. Thus, there would be a problem in terms of limit on the roller size. Moreover, the first and second rubber layers would become extremely thick and behave as if they form a single-layer rubber roller when the spinning roller is operated. Thus, the spinning roller would lose its feature of having a double-layer structure.
  • T 2 /T 1 The ratio of the thickness T 2 of the second rubber layer to the thickness T 1 of the first rubber layer: T 2 /T 1 is required to be 1/1 to 1/10; and is preferably 1/1 to 1/6 and further preferably 1/3 to 1/6. Since the ratio T 2 /T 1 is set in the above range, even if the apparent hardness is the same, it is possible to obtain a wider nip width and ensure a consistent yarn quality.
  • the thickness of the elastic layer is 3 to 20 mm
  • the ratio T 2 /T 1 is larger than 1/1
  • the second rubber layer 6 would become too thick relative to the first rubber layer 4, and it would be difficult to obtain a sufficient nip width.
  • the apparent hardness of the roller surface would tend to become higher.
  • the ratio T 2 /T 1 is larger than 1.15/1, such tendency would increase.
  • the ratio T 2 /T 1 is smaller than 1/10, since the second rubber layer 6 would become considerably thin relative to the first rubber layer 4, it would be difficult to obtain a roller of uniform quality.
  • only a slight wear of the second rubber layer 6 due to use would cause the apparent hardness to sharply decline or become difficult to control.
  • the thickness T 1 of the first rubber layer is preferably 1.5 to 10 mm and further preferably 2.25 to 9 mm, for example.
  • the thickness T 1 of the first rubber layer being more than 1.5 mm (e.g., more than 2.25 mm) serves as an advantage in widening the nip width.
  • the thickness T 1 of the first rubber layer is less than 10 mm (e.g., less than 9 mm), the first rubber layer can easily be attached to a common widely-used spinning machine, without any limit on the roller size.
  • the thickness T 2 of the second rubber layer is preferably 0.5 to 10 mm and further preferably 0.75 to 3 mm, for example. Since the thickness T 2 of the second rubber layer is more than 0.5 mm (e.g., more than 0.75 mm), it becomes easier to obtain a roller of uniform quality, and also, sharp decline in the apparent hardness associated with wear is unlikely to occur. Furthermore, the roller surface can be easily reground and the running cost for spinning can be reduced. On the other hand, since the thickness T 2 of the second rubber layer is less than 10 mm (e.g., less than 3 mm), it becomes easier to widen the nip width.
  • the apparent hardness of the surface of the spinning roller 1 satisfying the foregoing conditions is 50° to 80° and preferably 55° to 70°, for example.
  • an adhesive that is to become a first adhesive layer 3 is uniformly applied to the external surface of a pipe 2. Then, via the first adhesive layer 3, the external surface of the pipe 2 is coated with a first rubber composition that is unvulcanized and cylindrically extruded with use of an extruder. Thereafter, the first rubber composition is vulcanized to form a first rubber layer 4.
  • an adhesive that is to become a second adhesive layer 5 is uniformly applied to the external surface of the first rubber layer 4.
  • a second rubber composition rubber tube
  • unvulcanized and cylindrically molded in advance is fitted around the first rubber layer 4 so as to coat the ground external surface.
  • the second rubber composition is vulcanized to form a second rubber layer 6.
  • the external surface of the second rubber layer is ground, thereby to complete a spinning roller 1.
  • An alternative production method may be used, the method using an extruder which has a function of sending out a pipe 2 at a predetermined speed; and a function of pushing out an unvulcanized first rubber composition (inner layer) and an unvulcanized second rubber composition (outer layer) together, such that the two rubber compositions become coaxial with the pipe 2.
  • a preform of the roller is obtained, the preform comprising: the pipe 2; the unvulcanized first rubber composition (inner layer) that coats the external surface of the pipe 2; and the unvulcanized second rubber composition (outer layer) that coats the external surface of the inner layer.
  • an adhesive is preferably applied to the external surface of the pipe 2 before being coated with the inner layer.
  • the inner layer and the outer layer are vulcanized together, thereby to form an elastic layer including the first rubber layer 4 and the second rubber layer 6.
  • the external surface of the second rubber layer is ground. In that case, the second adhesive layer 5 can be omitted.
  • a spinning roller illustrated in Fig. 1 was produced by the following procedures.
  • An adhesive was applied to the external surface of a cylindrical pipe 2 (diameter: 21 mm, width: 1250 mm) made of aluminum, to form a first adhesive layer 3. Then, an unvulcanized NBR composition was extruded in layer form onto the first adhesive layer 3, and then vulcanized, thereby to form a first rubber layer 4. The external surface of the first rubber layer 4 formed was ground. The thickness of the first rubber layer was 4.63 mm.
  • An adhesive was applied to the external surface of the first rubber layer 4 after the grinding in (a) above, to form a second adhesive layer 5.
  • a rubber tube was formed separately with use of an unvulcanized NBR composition.
  • the rubber tube obtained was attached onto the second adhesive layer 5 so as to coat the external surface of the second adhesive layer 5, and then vulcanized, thereby to form a second rubber layer 6.
  • the elastic layer was cut together with the pipe to have a predetermined width, thereby to obtain a spinning roller 1.
  • the thickness and hardness of the second rubber layer were 0.77 mm and 70°, respectively.
  • the thickness of the whole rubber layer (elastic layer) including the first rubber layer and the second rubber layer was 5.4 mm.
  • the ratio of a thickness T 2 of the second rubber layer to a thickness T 1 of the first rubber layer: T 2 /T 1 was 1/6.
  • the hardnesses of the first rubber layer and the second rubber layer were measured in the following manner.
  • test pieces were produced as defined in "Durometer hardness test" of JIS-K6253 "Rubber, vulcanized or thermoplastic - Determination of hardness”. Then, the test pieces obtained were measured with a Type A durometer in compliance with "Durometer hardness test” as standardized in the above-mentioned JIS-K6253.
  • the apparent hardness corresponding to the hardness of the whole rubber layer (elastic layer) including the first and second rubber layers, was measured by pressing a Type A durometer against the surface of the second rubber layer of the spinning roller.
  • Fig. 3 is a schematic illustration to describe a method of measuring the nip width.
  • a roller R is held between a metal plate P1 and a metal plate P2 that are disposed below and above the roller R, respectively, as illustrated in Fig. 3 .
  • a load of 16 kgf (157 N) is applied to the roller R from above, via the metal plate P2, as indicated by the arrow in Fig. 3 . Due to applying the load, the roller R becomes slightly distorted in a horizontal direction, and this causes the respective contact faces between the roller R and the metal plates P1 and P2 to increase.
  • a width W of the contact face between the distorted roller R and the metal plate P1 disposed below the roller R is measured, and then evaluated as the nip width.
  • a spinning roller was produced as in Example 1, the thickness of the whole rubber layer therein being 5.4 mm.
  • a spinning roller was produced as in Example 1, the thickness of the whole rubber layer therein being 5.4 mm.
  • a vulcanized rubber layer with a hardness of 70° was formed on the external surface of the cylindrical pipe via the first adhesive layer 3, followed by grinding of the external surface of the rubber layer formed, thereby to produce a spinning roller having a rubber layer with a single-layer structure and a thickness of 5.4 mm.
  • a vulcanized rubber layer with a hardness of 65° was formed on the external surface of the cylindrical pipe via the first adhesive layer 3, followed by grinding of the external surface of the rubber layer formed, thereby to produce a spinning roller having a rubber layer with a single-layer structure and a thickness of 5.4 mm.
  • a spinning roller was produced as in Example 1, the thickness of the whole rubber layer therein being 5.4 mm.
  • a spinning roller was produced as in Example 1, the thickness of the whole rubber layer therein being 5.4 mm.
  • Example 2 and 3 and Comparative Examples 1 to 4 the apparent hardnesses and the nip widths were measured as in Example 1. The results are shown in Table 1.
  • Table 1 T 2 /T 1 Hardness of inner layer (°) Hardness of outer layer inner (°) Apparent hardness(°) Nip width(mm) Ex.1 1:6 35 70 55 15.9 Ex.2 1:2 35 70 65 14.1 Ex.3 1:1 35 70 70 12.4 Comp.Ex.1 - - - 70 9.7 Comp.Ex.2 - - - 65 11.0 Comp.Ex.3 6:1 35 70 72 10.2 Comp.Ex.4 2:1 35 70 71 11.1
  • Example 2 As shown in Table 1, the apparent hardnesses of the roller of Example 2 and the roller of Comparative Example 2 were both the same, being 65°. However, the nip width in Example 2 was longer than that in Comparative Example 2, and a widening of the nip width was observed.
  • Example 3 the apparent hardnesses of the roller of Example 3 and the roller of Comparative Example 1 were both the same, being 70°.
  • the nip width in Example 3 was longer than that in Comparative Example 1, and a widening of the nip width was observed.
  • the spinning roller of the present invention can be used in processes in spinning such as combing, drawing, roving, and spinning; and is also expected to be used in a wide range of applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (5)

  1. Rouleau de filature (1) comprenant:
    un tube cylindrique (2); et
    une couche élastique cylindrique fixée à une surface extérieure du tube (2),
    la couche élastique comprenant:
    une première couche de caoutchouc (4) sur un côté intérieur; et
    une seconde couche de caoutchouc (6) sur un côté extérieur, fixée à la première couche de caoutchouc (4),
    une dureté de la seconde couche de caoutchouc (6) au duromètre de type A conformément à JIS-K6253 est supérieure ou égale à 60°, et
    un rapport (T2/T1) entre une épaisseur (T2) de la seconde couche de caoutchouc (6) et une épaisseur (T1) de la première couche de caoutchouc (4) étant de 1/1 à 1/10
    caractérisé en ce que
    une dureté de la première couche de caoutchouc (4) au duromètre de type A conformément à JIS-K6253 est de 30° à 38°, et
    une épaisseur de la couche élastique est de 3 à 20 mm.
  2. Rouleau de filature (1) selon la revendication 1,
    dans lequel la dureté au duromètre de type A de la seconde couche de caoutchouc (6) est de 65° à 95°.
  3. Rouleau de filature (1) selon la revendication 2,
    dans lequel la dureté au duromètre de type A de la seconde couche de caoutchouc (6) est de 65° à 73°.
  4. Rouleau de filature (1) selon l'une quelconque des revendications 1 à 3,
    dans lequel l'épaisseur (T1) de la première couche de caoutchouc (4) est de 1.5 à 10 mm.
  5. Rouleau de filature (1) selon l'une quelconque des revendications 1 à 4,
    dans lequel le rapport (T2/T1) et de 1/3 à 1/6.
EP13812558.8A 2012-07-05 2013-07-04 Rouleau de filature Active EP2871270B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012151031A JP2014012910A (ja) 2012-07-05 2012-07-05 紡績用ローラー
PCT/JP2013/004174 WO2014006915A1 (fr) 2012-07-05 2013-07-04 Rouleau de filature

Publications (3)

Publication Number Publication Date
EP2871270A1 EP2871270A1 (fr) 2015-05-13
EP2871270A4 EP2871270A4 (fr) 2015-07-29
EP2871270B1 true EP2871270B1 (fr) 2017-11-08

Family

ID=49881682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13812558.8A Active EP2871270B1 (fr) 2012-07-05 2013-07-04 Rouleau de filature

Country Status (4)

Country Link
EP (1) EP2871270B1 (fr)
JP (1) JP2014012910A (fr)
CN (1) CN104321474B (fr)
WO (1) WO2014006915A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6331689B2 (ja) * 2014-05-23 2018-05-30 村田機械株式会社 繊維送りローラ、ドラフト装置及び紡績機
CN105755597A (zh) * 2016-04-29 2016-07-13 无锡市兰翔胶业有限公司 一种纺纱用胶辊
CN113072756A (zh) * 2021-02-24 2021-07-06 江阴市东杰纺机专件有限公司 一种纺织用高强度耐磨罗拉及其加工工艺

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Publication number Priority date Publication date Assignee Title
CH442095A (de) * 1966-08-25 1967-08-15 R & E Huber Schweizerische Kab Mit einem elastischen Belag versehene Walze für Streckwerk an Spinnereimaschine
JPS5089644A (fr) * 1973-12-13 1975-07-18
US4550478A (en) * 1981-08-04 1985-11-05 Armstrong World Industries, Inc. Two-ply spinning cots
US4530866A (en) * 1983-10-12 1985-07-23 Yamauchi Rubber Industry Co., Ltd. Rubber roller for spinning
JP2004225216A (ja) * 2003-01-24 2004-08-12 Hokushin Ind Inc 紡績用ゴムロール及びその製造方法
CN2622209Y (zh) * 2003-05-23 2004-06-30 无锡二橡胶股份有限公司 纺纱中上罗拉的金属衬橡胶辊
JP4833641B2 (ja) 2005-11-21 2011-12-07 ヤマウチ株式会社 紡績用ローラー
CN202202055U (zh) * 2011-08-16 2012-04-25 无锡二橡胶股份有限公司 高速高温高耐磨纺纱胶辊

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
JP2014012910A (ja) 2014-01-23
EP2871270A1 (fr) 2015-05-13
EP2871270A4 (fr) 2015-07-29
CN104321474B (zh) 2016-12-07
CN104321474A (zh) 2015-01-28
WO2014006915A1 (fr) 2014-01-09

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