CN1493728B - Sewing machine and shuttle for sewing machine - Google Patents
Sewing machine and shuttle for sewing machine Download PDFInfo
- Publication number
- CN1493728B CN1493728B CN 03125483 CN03125483A CN1493728B CN 1493728 B CN1493728 B CN 1493728B CN 03125483 CN03125483 CN 03125483 CN 03125483 A CN03125483 A CN 03125483A CN 1493728 B CN1493728 B CN 1493728B
- Authority
- CN
- China
- Prior art keywords
- shuttle
- weight
- tube
- sliding
- carbon nano
- 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.)
- Expired - Fee Related
Links
Landscapes
- Sewing Machines And Sewing (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sliding-Contact Bearings (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The present invention discloses a shuttle of a sewing machine, which comprises an outer shuttle and an inner shuttle in the outer shuttle. A sliding groove formed on the inner circumference of the outer shuttle is jogged with a sliding guide protruded on the outer circumference of the inner shuttle, sliding relatively with the rotation of the outer shuttle. A resin film is arranged on the surface of relative sliding guide of the inner shuttle sliding part, which takes thermoplastic polyamide as a main body and mixes at least carbonnanotube (CNT) in a range of 1 w% to less than 10w%, and the CNT has a fiber shape with a diameter of 100nm or less and a length of 1[mu]m or more. Carbon fiber with a diameter of 1[um]m or fluororesin can be contained as required.
Description
Technical field
The present invention relates between the 1st member of relative motion and the 2nd member, to have the Sewing machines of slipper and have outside the Sewing machines of shuttle and Nei Suo.
Background technology
, in the shuttle of Sewing machines, openly put down into shown in 10 years No. 272274 communique like the Japanese Patent Laid application in the past, and formed rail groove on the shuttle outside, the rail bar of interior shuttle gets in this rail groove and slides relatively.At this moment, in order to improve sliding and mar proof, on the rail bar of interior shuttle, be formed with sliding layer.This sliding layer is made up of the macromolecular composition that contains in the polyamide-based resin as the silicone oil of lubricant.In this macromolecular composition, contain the fibre strengthening agent of PAN based carbon fiber etc. again.
Yet, as stated,, exist the problem of the sliding and the mar proof that can not fully improve slipper if only form sliding layer by the macromolecular composition that contains common carbon fiber.That is, because of the diameter of common carbon fiber is about 5 μ m, so it is less all to expose the surface area of carbon fiber with respect to the surface area that slides, the result is the sliding properties that has reduced slipper.
The object of the invention is, Sewing machines and the shuttle of Sewing machines of sliding and mar proof that can fully improve the slipper of outer shuttle and interior shuttle of sliding and mar proof of the slipper of the 1st member that can fully improve relative motion and the 2nd member is provided.
Summary of the invention
Sewing machines of the present invention, relative motion, have in the 1st member and the 2nd member of slipper each other, the slipper of at least the 1 member is made up of the resin that is mixed with carbon nano-tube (carbon nano tube).
Carbon nano-tube is because of harder than resin, and sliding is good, so can improve sliding properties through it being configured to sliding surface.In this occasion; Because carbon nano-tube is littler than the diameter of carbon fiber; Therefore, it is many greatly that the whole surface area that can make with respect to slide exposes the surface area of carbon nano-tube, and the result can fully improve the sliding and the mar proof of slipper of the 1st member and the 2nd member of relative motion.Again, because of carbon nano-tube is the tubulose of hollow, weight is lighter, so also can make the 1st member realize lightweight.
At this moment, can make said carbon nano-tube below the diameter 100nm, the drum (fiber shape) more than the length 1 μ m.Thus, can further improve the sliding properties of slipper.
Can adopt thermoplastic polyamide or polyamide-imide to be used as above-mentioned resin.Because of these polyamide and polyamide-imide itself are not easy wearing and tearing,, can further improve sliding properties so compare with the occasion of other resin of use.Through using thermoplastic, the formability aspect is also good.
Again, according to the inventor's research, the combined amount of said carbon nano-tube is preferably in more than the 1 weight %.Thus, can obtain good sliding properties.As the upper limit of combined amount, to be advisable below the 20 weight %.
Also can in resin, mix the carbon fiber more than the diameter 1 μ m.The above carbon fiber price of diameter 1 μ m is lower, has certain effect to improving sliding properties, therefore, through with itself and carbon nano-tube and usefulness, can reduce the use amount of the carbon nano-tube of high price, with the reduction price.
Also can in resin, mix fluororesin.Because of the fluororesin coefficient of friction is little,, can further improve the sliding properties of slipper so make the surperficial sliding of slipper better.Through mixing fluororesin, also has the advantage of the dispersiveness that improves carbon nano-tube.The combined amount of fluororesin is preferably below 10 weight %.
Slipper as in the Sewing machines includes: the slipper of slipper, thread take-up tension lever axle and the slide block of the interior shuttle of shuttle and the slipper of outer shuttle, shank and shank support member, the sliding part of cranking arm with bent axle grade.Wherein, Because the present invention is applicable to the interior shuttle of the endurance issues that revolution at a relatively high speed and use (slip) exist when the time is longer and the slipper of outer shuttle; Therefore the sliding and the mar proof of the slipper of shuttle and outer shuttle improve durability in can fully improving, and have very large effect.
In this occasion, the structure that normally adopts the sliding tray make outer shuttle to slide, but from the viewpoint of formability with respect to the rail plate of interior shuttle, preferably the surface element with the rail plate of interior shuttle is made up of the resin that is mixed with carbon nano-tube.
The shuttle of Sewing machines of the present invention is that at least one side of surface element of the rail plate of interior shuttle outer peripheral face that the surface element of the sliding tray of outer shuttle inner peripheral surface and the relativity chimeric with it are slided is made up of the resin that is mixed with carbon nano-tube.The resin that is mixed with carbon nano-tube through use constitutes slipper, can fully improve the sliding and the mar proof of the slipper of outer shuttle and interior shuttle,
At this moment, if said carbon nano-tube is the drum below the diameter 100nm, more than the length 1 μ m, then can further improve the sliding properties of slipper.
If use thermoplastic polyamide or polyamide-imide as above-mentioned resin, then can further improve sliding properties, the formability aspect is also good.
Be set in more than the 1 weight % through combined amount, then can obtain good sliding properties carbon nano-tube.
If in resin, be mixed with the carbon fiber more than the diameter 1 μ m, then can reduce the use amount of the carbon nano-tube of high price, to reduce price.
If in said resin, be mixed with fluororesin, then can further improve the sliding properties of slipper.The dispersiveness that also can help improving.
Description of drawings
Fig. 1 representes the shuttle construction of the Sewing machines of one embodiment of the invention, (a) is the profile of this outer shuttle and Nei Suo, (b) amplifies the profile of expression for this slipper.
Fig. 2 is the chart of the data of expression result of the test.
Fig. 3 is the chart of the data of another result of the test of expression.
Fig. 4 is the chart of the data of the another result of the test of expression.
The specific embodiment
With reference to Fig. 1～Fig. 4 one embodiment of the invention is described below.Present embodiment is the occasion that the present invention is applicable to the shuttle of industrial sewing machines.Fig. 1 is the profile of shuttle section of the Sewing machines of present embodiment.At first, shown in Fig. 1 (a), the shuttle of present embodiment have outer shuttle 1 and be contained in this outer shuttle 1, the interior shuttle 3 consistent with gyroaxis.
Wherein, outer shuttle 1 by the outer shuttle body 5 of central authorities, be installed on big peristome 7 sides ring-type interior shuttle pressing plate 9 and constitute with the hub portion 11 of interior shuttle pressing plate 9 reverse side settings.Formation has the stage portion 15 of lateral surface 17A and all side 17C on the shuttle body 5 outside said, has been formed the sliding tray 17 of ring-type by the medial surface 17B of this stage portion 15 and Nei Suo pressing plate 9.This sliding tray 17 be a kind of with after the rail plate 19 of the interior shuttle 3 stated chimeric and can support the endless groove of interior shuttle 3 with reversing, be formed at the inner peripheral surface of the peristome 7 of outer shuttle 1.Again, said hub portion 11 have can chimeric fixedly shuttle driving shaft 21 centre bore 23.In addition, outside shuttle body 5 around fixing the wire loop that constitutes by metallic plate with the position of spur 31 adjacency and expand and open plate 33.
On the other hand, interior shuttle 3 has the cylindrical portion 35 with outer shuttle 1 chimeric (end is by obturation), and the periphery of this cylindrical portion 35 is formed with the rail plate 19 of ring-type protrusion.That is, shown in Fig. 1 (b), this rail plate 19 forms the state chimeric with sliding tray 17, have parallel left and right side 19A, 19B and with this left and right side 19A, the rectangular outer peripheral face 19C of 19B.In this, can adorn in the shuttle 3 and contain not shown bottom line with getting and use shuttle.
Said outer shuttle 1 under the shuttle 3 rotating states, carries out high speed rotary (like 8000rpm) through the shuttle driving shaft 21 that is driven by not shown electrical motor of sewing machine revolution in said by not shown shuttle retainer prevention.At this moment, rail plate 19 slides in sliding tray 17 relatively.Thus, interior shuttle 3 is equivalent to the 1st member of the present invention and the 2nd member respectively with outer shuttle 1.In addition, said outer shuttle 1 for example constitutes by soaking carbon hardened steel with Nei Suo 3.
And, with said in the surface element of the suitable rail plate 19 of shuttle 3 slippers be provided with resin film 37.This resin film 37, is mixed with carbon nano-tube (being designated hereinafter simply as " CNT ") therein at least and constitutes as main body with polyamide thermoplastic (PI).In this occasion, the amount of CNT is defined as more than the 1 weight %, below the 20 weight %.This resin film 37 for example can be shaped through outer folding card (outsert) and be provided with.
Said CNT is that a kind of diameter is that 100nm is following, length is the above drum (carbon fiber shape) of 1 μ m.Also can contain the above carbon fiber (being designated hereinafter simply as " CF ") of diameter 1 μ m as required, perhaps add below the fluororesin 10 weight %.
Like this, because of CNT is harder and sliding good than resin, so, can improve the sliding properties of the resin film 37 that is mixed with CNT through on its sliding surface, disposing CNT.At this moment, CNT is much littler than the diameter of CF, and the CF of the diameter 5 μ m through will be in the past changes over the CNT of diameter 100nm, and diameter becomes 1/50th, if its length is also similarly reduced, then in same volume, carbon surface is long-pending to be 50 2 powers.Can increase the CNT surface area that exposes with respect to the whole surface area that slides so significantly, when being mixed with same weight, compare with CF, a side the sliding properties that is mixed with CNT is far better.Can also more mix.Again, because of being tubulose (hollow form), so but lightweight.
Make an explanation in the face of the test of carrying out for the effect of confirming present embodiment down.
At first, Fig. 2 representes to use pin dish (ピ Application オ Application デ イ ス Network) type testing machine to obtain resin film 37 and be mixed with the occasion of CNT and the wear extent (wear rate) under the unmixing occasion and the result of the test of coefficient of friction.This test be through on rotating dish test film with 2 pin shapes add sheets with fixed load push to the object's position of opening the interval of certain distance with the gyroaxis septum cordis; Be a kind of known test method, for example can see the Japanese Patent Laid application for details and openly put down into communique 8 years No. 173668.
In this occasion, the dish material is to soak carbon hardened steel with the sliding tray 17 corresponding SCM415 (chrome-molybdenum steel) of outer shuttle 1.Again, as experimental condition, the shape of pin is SR8 (sphere), and speed is 4m/s, and load is 0.5kgf.These are as the condition of preferring with the sliding condition of the Sewing machines real machine of reality.
The material of pin have 4 types promptly, containing carbon fiber 30 weight %, be added with the CNT that fluororesin for example is mixed with 0,1,3,5% (weight %) in the polyamide thermoplastic below the polytetrafluoroethylene (PTFE) 10 weight % respectively.Again, wear extent is that the pin diameter after 40 minutes calculates, through calculating wear rate divided by load and displacement.
Its result, the unmixed CNT of having (0%) type wear rate is 0.00555mm
3/ kgfm, bigger, comparatively speaking, the wear rate that is mixed with the 1%CNT class is 0.003mm
3/ kgfm, the wear rate that is mixed with the 3%CNT class is 0.003mm
3/ kgfm, the wear rate that is mixed with the 5%CNT class is 0.002mm
3/ kgfm.Thus,, then can obtain to reduce the effect of wear rate, preferably mix more than 5% if CNT is mixed more than 1%.In addition, four kinds do not have big difference aspect coefficient of friction.
Fig. 3 representes respectively for the blank of four types of polyamide+CF+ fluororesin, polyamide+CF, polyamide+fluororesin, polyamide, through changing the result after the CNT combined amount is tested equally.
From this result of the test, can confirm,, then in all blanks, all exist the tendency that wear rate reduces if increase the CNT combined amount.Again, when containing fluororesin, because of coefficient of friction is decreased to 0.2 from 0.4, it is good to demonstrate sliding, so wear rate also reduces.In addition, though in Fig. 3, do not make diagram, can confirm; If in monomer of polyamide, be mixed with CNT20 weight % when above, can obtain and the equal wear rate of polyamide+CF+10%CNT, yet; Because of the CNT price is high, so at present preferably to use with type of mixing of CF.
Fig. 4 representes to investigate the result of the test after the durability (life-span) of shuttle aspect of Sewing machines real machine.This result of the test is the result with the on-off in 5 seconds of repetition under machine spindle 4000rpm (the shuttle axle 8000rpm) state.At this, the wearing and tearing of the slipper of shuttle, its shake allowance are reached the roughly life-span of 0.2mm time point as shuttle.
Can find out that from this result in traditional method of having only mixed C F, the life-span of shuttle is about 400 hours, but in 1 shuttle of the present embodiment more than being mixed with CNT5%, can realize increasing twice 800 hours durability.
Variation of the present invention is described below.
The foregoing description is with resin film 37 rail plate 19 to be coated, but also can adopt the resin that contains CNT form rail plate 19 itself, or adopt the resin that contains CNT form whole in shuttle.And, also can adopt the resin that contains CNT to form the stage portion 15 or the whole outer shuttle of outer shuttle 1.The slipper aspect of shuttle and interior shuttle does not limit outside, and for example, the slipper of the slipper in shank and shank support member also capable of using, thread take-up tension lever axle and slide block, the sliding part of cranking arm with bent axle grade.
Again, the foregoing description be to use polyamide thermoplastic as base resin so that it can carry out the example of ejection formation, but also can use other resin.Even thermoplasticity, the fusion temperature of above-mentioned polyamide is 400 ℃, need be heated to more than 400 degree metal pattern etc. during shaping, and temperature is very high, and operation is difficulty very.Can confirm that through experiment the polyamide-imide resin can obtain the sliding properties with the polyamide peer-level, near fusion temperature is in 300 ℃, also can use.Polyamide is to belong to the hardest and nonabradable material in the resin that uses as sliding material, but from cost and formability, also can use other resin instead.In as the resin of the sliding material of polyimide (PEI), polyether-ether-ketone (PEEK), polyphenylene sulfide more uses such as (PPS), also can on degree not of the same race, improve mar proof through adding CNT.
Again, the foregoing description with unlubricated fully (no oil supply) as an example, but under butter, oil lubrication, micro-oil supply condition, the sliding properties of the material of this structure also is a most excellent, through being mated use, can realize high lifeization.
Claims (6)
1. Sewing machines, the interior shuttle of relative motion and outside have slipper between the shuttle, it is characterized in that,
Shuttle constitutes by soaking carbon hardened steel with outer shuttle in said,
At least the surface element of the slipper of shuttle is provided with resin film in said,
Said resin film, in thermoplastic polyamide or polyamide-imide with more than the 1 weight % and less than 10 weight % be mixed with diameter below 100 millimicrons (nm), the carbon nano-tube of the formation hollow cylinder shape of length more than 1 micron (μ m), and
Be mixed with carbon fiber and the fluororesin of diameter more than 1 μ m simultaneously.
2. Sewing machines as claimed in claim 1 is characterized in that, the combined amount of said carbon nano-tube is more than the 5 weight % and less than 10 weight %.
3. Sewing machines as claimed in claim 1 is characterized in that, the combined amount of said carbon nano-tube is more than the 1 weight % and below the 5 weight %.
4. the shuttle of a Sewing machines, comprising: inner peripheral surface has the outer shuttle of sliding tray; And be contained in this outer shuttle, on outer peripheral face, have and the chimeric interior shuttle with the rail plate that slides of said sliding tray, it is characterized in that,
Shuttle constitutes by soaking carbon hardened steel with outer shuttle in said,
At least one side in the surface element of said sliding tray and the surface element of said rail plate is provided with resin film,
Said resin film, in thermoplastic polyamide or polyamide-imide with more than the 1 weight % and less than 10 weight % be mixed with diameter below 100 millimicrons (nm), the carbon nano-tube of the formation hollow cylinder shape of length more than 1 micron (μ m), and
Be mixed with carbon fiber and the fluororesin of diameter more than 1 μ m simultaneously.
5. the shuttle of Sewing machines as claimed in claim 4 is characterized in that, the combined amount of said carbon nano-tube is more than the 5 weight % and less than 10 weight %.
6. the shuttle of Sewing machines as claimed in claim 4 is characterized in that, the combined amount of said carbon nano-tube is more than the 1 weight % and below the 5 weight %.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002-280416 | 2002-09-26 | ||
| JP2002280416 | 2002-09-26 | ||
| JP2002280416A JP2004113435A (en) | 2002-09-26 | 2002-09-26 | Sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1493728A CN1493728A (en) | 2004-05-05 |
| CN1493728B true CN1493728B (en) | 2012-09-05 |
Family
ID=32275129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03125483 Expired - Fee Related CN1493728B (en) | 2002-09-26 | 2003-09-23 | Sewing machine and shuttle for sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004113435A (en) |
| CN (1) | CN1493728B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013065652A1 (en) * | 2011-10-31 | 2013-05-10 | 株式会社リケン | Piston ring |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293273A (en) * | 1999-10-15 | 2001-05-02 | 重机公司 | Rotary shuttle of sewing machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02298555A (en) * | 1989-05-15 | 1990-12-10 | Asahi Chem Ind Co Ltd | Resin composition for electrically conductive sliding member |
| JPH10272274A (en) * | 1997-04-01 | 1998-10-13 | Juki Corp | Shuttle for sewing machine |
| JP4535634B2 (en) * | 2000-03-31 | 2010-09-01 | 大阪瓦斯株式会社 | Method for producing nanoscale needle-like material |
| JP2002020628A (en) * | 2000-07-03 | 2002-01-23 | Teijin Chem Ltd | Thermoplastic resin composition |
| JP3403153B2 (en) * | 2000-07-18 | 2003-05-06 | ジューキ株式会社 | Composition for sliding member and sliding member |
| JP2002105314A (en) * | 2000-09-29 | 2002-04-10 | Shimadzu Corp | Lubricating composition |
-
2002
- 2002-09-26 JP JP2002280416A patent/JP2004113435A/en active Pending
-
2003
- 2003-09-23 CN CN 03125483 patent/CN1493728B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293273A (en) * | 1999-10-15 | 2001-05-02 | 重机公司 | Rotary shuttle of sewing machine |
Non-Patent Citations (2)
| Title |
|---|
| 余荣清等.多形态尺寸的纳米管的制备及电镜图象.高等学校化学学报15 9.1994,15(9),1388-1389. |
| 余荣清等.多形态尺寸的纳米管的制备及电镜图象.高等学校化学学报15 9.1994,15(9),1388-1389. * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004113435A (en) | 2004-04-15 |
| CN1493728A (en) | 2004-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102197150B (en) | Sliding bearing with improved wear resistance and method of manufacturing same | |
| Kurokawa et al. | Performance of plastic gear made of carbon fiber reinforced poly-ether-ether-ketone: Part 2 | |
| CN1493728B (en) | Sewing machine and shuttle for sewing machine | |
| EP1750031A2 (en) | Method for manufacturing wet-type friction member | |
| CN101415963A (en) | Sliding bearing | |
| CN107269707A (en) | The bushing of dual structure and the bearing assembly for possessing the bushing | |
| US20080269008A1 (en) | Infinitely Variable Transmission | |
| CN105605082A (en) | Eccentrically oscillating reduction gear, and method for manufacturing eccentric body shaft | |
| CN109563225A (en) | Heat-curable urethane composition and application thereof | |
| CN102639685A (en) | Lubricant oil, friction member, and gear-type differential having limited slip function | |
| EP1394319A1 (en) | Belt for a papermaking machine | |
| CN101846165A (en) | Belt driver | |
| CN102472321A (en) | Slide bearing device and compressor | |
| CN101166596A (en) | Sliding component and method for manufacturing the same | |
| JP4331110B2 (en) | Ball bearings and self-winding watches | |
| DE20302774U1 (en) | Release device with a device for compensating for inaccuracies in a friction clutch of a motor vehicle | |
| EP1230499A1 (en) | Infinitely variable transmission | |
| JP2900244B2 (en) | Constant velocity universal ball joint | |
| EP1255059A2 (en) | Center differential unit and planetary gear | |
| Unal et al. | Study of abrasive wear volume map for PTFE and PTFE composites | |
| CN1690463A (en) | Woven composite clutch friction member with dual-directional moduli of elasticity | |
| JP2006322613A (en) | Constant-velocity joint | |
| Vinothkumar et al. | Study and Investigation of Tribological Functions of Nano Additive with SAE 40/W20 Oil on EN 19 | |
| JP2006199777A (en) | Wet friction material | |
| JPH0914269A (en) | Sintered alloy bearing for make-up feeding lost oil content of grease |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CI01 | Correction of invention patent gazette |
Correction item: Grant text Correct: Correct False: Error Number: 36 Volume: 28 |
|
| CI03 | Correction of invention patent |
Correction item: Grant text Correct: Correct False: Error Number: 36 Page: Description Volume: 28 |
|
| ERR | Gazette correction |
Free format text: CORRECT: AUTHORIZED TEXT; FROM: ERROR TO: CORRECT |
|
| RECT | Rectification | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20200923 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |