CN1039547C - Unit of sewing maching - Google Patents
Unit of sewing maching Download PDFInfo
- Publication number
- CN1039547C CN1039547C CN 93101180 CN93101180A CN1039547C CN 1039547 C CN1039547 C CN 1039547C CN 93101180 CN93101180 CN 93101180 CN 93101180 A CN93101180 A CN 93101180A CN 1039547 C CN1039547 C CN 1039547C
- Authority
- CN
- China
- Prior art keywords
- bobbin case
- inward turning
- mentioned
- titanium nitride
- turning bobbin
- 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 - Lifetime
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-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2209/00—Use of special materials
- D05D2209/12—Metals or metal coatings
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- Physical Vapour Deposition (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
For preventing the occurrence of pilling and wire breaking, and increasing durability simultaneously, titanium nitride is coated on the surfaces of the components of a sewing machine, such as an internal rotation shuttle shell, an external rotation shuttle shell, a shuttle peg, a shuttle peg sleeve, a thread take-up lever, a presser foot, a rotating shuttle frame, a rotating shuttle rod, etc.
Description
The present invention relates to the full circle swinging rotating shuttle shell of Sewing machines.On the full circle swinging rotating shuttle shell of Sewing machines, the revolution of outer bobbin case is that the guide rail groove that forms on the outward turning bobbin case is a guiding with the guide rail that forms on the inward turning bobbin case.Therefore when Sewing machines ran up, the frictional force that is produced by outward turning bobbin case and inward turning bobbin case contact-making surface probably can make it that calcination takes place.Calcination makes and stops it to produce resistance along the rotating shuttle portion of ending of outward turning bobbin case gyratory directions on the inward turning bobbin case, when forming stitching, causes upper thread to break away from difficulty from ending shuttle portion, perhaps breaks end.
In order to improve its mar proof, the method for Shi Shiing was chromium plating on rotating shuttle frame and outward turning bobbin case in the past, still, and like this and fail to make broken string to reduce.In addition, in order to prevent broken string, also have to coat special teflon (polytetrafluoroethylene (PTFE)) on rotating shuttle frame surface, it is such to open clear 54-142060 communique strictly according to the facts, but the effect of sufficient of so also failing to obtain.
And, with the rotating shuttle shell poor durability of special teflon coating.Make the operation meeting for a long time continuously special teflon clad is worn away, expose the original surface of inward turning bobbin case and outward turning bobbin case, its result rises the balling-up number of times that produces broken string, and the number of times that causes breaking rises, and this is the defective of this invention.
Purpose of the present invention is exactly to solve above technical problem, provides a kind of and can prevent that balling-up from taking place, and prevents that broken string from taking place, and improves the full circle swinging rotating shuttle shell of the Sewing machines of durability.
To achieve these goals, the full circle swinging rotating shuttle shell of Sewing machines of the present invention is characterized in that it comprises:
The inward turning bobbin case, this inward turning bobbin case has the receiving room of taking in bobbin case, form guide rail on the periphery of this inward turning bobbin case, adhered to by plasma spray method evaporation in its surface and form the clad that only is made of titanium nitride, the hardness of this titanium nitride clad is 1000～2000 Brinell hardness;
The outward turning bobbin case, this outward turning bobbin case has the receiving room of taking in above-mentioned inward turning bobbin case, on the interior week of this outward turning bobbin case, form the guide rail groove, this guide rail channel shaped becomes the size of the guide rail of the above-mentioned inward turning bobbin case of supporting, adhered to by plasma spray method evaporation on the surface of this outward turning bobbin case and form the clad that only is made of titanium nitride, the hardness of this titanium nitride clad is 1000～2000 Brinell hardness;
Bobbin case, this bobbin case has bobbin case is remained on shuttle door closure device in the receiving room of above-mentioned inward turning bobbin case, adhered to by plasma spray method evaporation on the surface of this bobbin case and form the clad that only is made of titanium nitride, this clad has 1000～2000 Brinell hardness;
The full circle swinging rotating shuttle shell of Sewing machines by above-mentioned bobbin case be accommodated in the above-mentioned inward turning bobbin case, the inward turning bobbin case of taking in above-mentioned bobbin case is accommodated in the above-mentioned outward turning bobbin case and constitute;
Prevent the generation of breaking by reducing coefficient of friction between outward turning bobbin case, inward turning bobbin case and the bobbin case, and, by having hardness and the mar proof that constitutes by titanium nitride, improve the durability of above-mentioned outward turning bobbin case, inward turning bobbin case and bobbin case.
According to the present invention, broken string number of times and the frequency that causes the balling-up of broken string have had significantly than the technology of the special teflon of above-mentioned coating and have descended, and durability has also had and increases substantially.
Embodiments of the invention are described with reference to the accompanying drawings.By following detailed description and accompanying drawing, above-mentioned purpose of the present invention and other purpose, characteristic, advantage are just clearer and more definite.
Brief description of drawings is as follows:
Fig. 1 is the front elevation of the inward turning bobbin case 1 of one embodiment of the invention.
Fig. 2 is the front elevation of the outward turning bobbin case 10 of another embodiment of the present invention.
Fig. 3 is the oblique view of the bobbin case 14 of another embodiment of the present invention.
Fig. 4 is present inventor's experimental result presentation graphs.
Fig. 5 is present inventor's experimental result presentation graphs.
Fig. 6 is the oblique view of the peg or spindle 30 of other embodiments of the invention.
Fig. 7 is the oblique view of the thread take-up tension lever 40 of other embodiments of the invention.
Fig. 8 is the oblique view of the presser feet 50 of other embodiments of the invention.
Fig. 9 is the oblique view of the rotating shuttle frame 60 of other embodiments of the invention.
Figure 10 is the oblique view of the rotating shuttle bar 70 of other embodiments of the invention.
Shown in figure, Fig. 1 is the front elevation of the inward turning bobbin case 1 of one embodiment of the invention.In the periphery of inward turning bobbin case 1, for guiding outward turning bobbin case 10 (described later shown in Figure 2) are provided with the guide rail 2 of protrusion, in inward turning bobbin case 1, form receiving room 4, take in peg or spindle and the bobbin case 14 (described later shown in Figure 3) of rolling up bottom line.Contain on the periphery of inward turning bobbin case 1 of guide rail 2 and coating titanium nitride, formed metal cured film 5.
Be formed with guide rail groove 11 by the guide rail guiding of inward turning bobbin case 1 in the inboard of outward turning bobbin case 10 shown in Figure 2, outside in the rotating shuttle shell 10, the promising receiving room 12 of taking in inward turning bobbin case 1; Interior week (the interior week of receiving room 12) at the outward turning bobbin case 10 that contains guide rail groove 11 is same with the periphery of inward turning bobbin case 1, is coating titanium nitride, becomes metal cured film 13.
On the bobbin case 14 of Fig. 3, the shuttle door closure that can load and unload with the inward turning bobbin case is being set, adjustable shuttle skin 15 also is housed.On the periphery of such bobbin case 14, with the above-mentioned same metal cured film 17 that coating.
Titanium nitride (TiN) is coated on method on inward turning bobbin case 1, outward turning bobbin case 10 and the bobbin case 14, can carries out with the plasma spray method.Promptly in the scorching hot discharge of nitrogen, make titanium (Ti) evaporation at its discharge space, (is coating to be coated the periphery of inward turning bobbin case 1 in the foregoing description, the interior week of outward turning bobbin case 10 and the periphery of bobbin case 14) surface adhered to by titanium nitride evaporation, forms the clad of metal cured film 5,13,17.
Metal cured film 5,13,17 with the plasma spray method forms has following advantage:
(a) can obtain the cured film of gold look, because color and luster can regulate to the stronger gold of redness from the stronger gold of yellow, so, when being implemented on inward turning bobbin case, outward turning bobbin case and the bobbin case, can be processed into beautiful appearance.
(b) hardness height.Detailed says, Brinell hardness can obtain under the formation condition than relative broad range in the hardness more than 1000, under only condition, can obtain Brinell hardness and be 2000 hardness.Owing to the hardness height that obtains, improved the ABRASION RESISTANCE of inward turning bobbin case and outward turning bobbin case contact-making surface.
(c) because coefficient of friction is low, it is good to slide, so, can prevent the generation of breaking.
(d) heat is conducted.Make that the cooling of inward turning bobbin case, outward turning bobbin case or other parts is easy, so, durability improved.
(e) Young's modulus height, anti-wear performance is superior.When coating titanium nitride on inward turning bobbin case 1, outward turning bobbin case 10, the bobbin case 14, can coat all surfaces of each parts, also can coat part surface.
Fig. 4 has shown present inventor's experimental result.Bottom line and upper thread are polyester threads, wash/when cotton two plies are made, the number of times of the upper thread balling-up that is taken place, the expression in the figure.Making length is 27m.What A1～A3 represented is the situation that has coated the full circle swinging rotating shuttle shell of 20 μ m titanium nitrides among the present invention; What B1～B3 represented is the experiment situation that is coating the full circle swinging rotating shuttle shell of the thick special teflon of 20 μ m, with as a comparative example; C
1～C
3What represent is the experiment situation of the metal full circle swinging rotating shuttle shell of chromium plating.Be understood that from Fig. 4, coat the generation that full circle swinging rotating shuttle shell that titanium nitride constitutes can suppress the upper thread balling-up with the present invention.
Fig. 5 also is an experimental result of the present invention.The experiment of its experiment condition and Fig. 4 explanation is same.What the figure shows is when having made 20m, the mean value of upper thread broken string number of times.As seen from the figure, the broken string that is produced with full circle swinging rotating shuttle shell A1, A2 of the present invention is few, and coating as a comparative example the mean value of broken string frequency of full circle swinging rotating shuttle shell C1 of the full circle swinging rotating shuttle shell B1 of special teflon and chromium plating much bigger.Be appreciated that thus with full circle swinging rotating shuttle shell of the present invention, can reduce the frequency of broken string.
According to present inventor's experiment, even the full circle swinging rotating shuttle shell of the present invention that is coating titanium nitride through making continuously more than 3000 hours, reaches as shown in Figure 5 as Fig. 4, the balling-up frequency is few, and in addition, the mean value that broken string takes place is also little.And coat the full circle swinging rotating shuttle shell B1～B3 of special teflon, when making 300～500 hours continuously, special teflon clad just is worn, the original surface that exposes inward turning bobbin case and outward turning bobbin case, its as a result the balling-up frequency and the broken string frequency mean value rise more than Fig. 4, experimental result shown in Figure 5.Therefore, can confirm that the full circle swinging rotating shuttle shell that titanium nitride of the present invention coats is compared with the full circle swinging rotating shuttle shell that special teflon coats, durability is good.
In sum, full circle swinging rotating shuttle shell constructed in accordance is compared with the full circle swinging rotating shuttle shell that coats with special teflon, can confirm that its balling-up frequency reduces, and the mean value of broken string frequency reduces, and endurance quality increases substantially.Table 1 has been listed the experimental result with example comparison in the past.
Table 1
Embodiment A is to have coated the thick titanium nitride of 20 μ m on metal full circle swinging rotating shuttle shell, comparative example B is the metal full circle swinging rotating shuttle shell that has same size shape with embodiment A, coated the thick special teflon of 20 μ m thereon, comparative example C is the metal full circle swinging rotating shuttle shell that has same size shape with embodiment A, is coated with the thick chromium of 20 μ m thereon.Upper thread and bottom line are polyester threads, wash/cotton 2 plies make, when making length 27m, and the frequency of broken string and upper thread balling-up, as shown in table 1, embodiment A is 55 times, and comparative example B is 80 times, and comparative example C is 100 times.Judge thus, can reduce the balling-up frequency significantly with embodiment A.
| The balling-up frequency | The mean value of broken string frequency | Durability | ||
| Embodiment | A | 55 | 1.0 | More than 3000 hours |
| Comparative example | B | 80 | 2.0 | 300～500 hours |
| C | 100 | 2.3 | 1000 hours | |
In addition, embodiment A through continuous more than 3000 hours make operation the time, the mean value of the balling-up frequency of its line and broken string frequency is few, and the titanium nitride clad does not have wearing and tearing.In contrast to this, coat the comparative example B of special teflon, through 300～500 hours make operation continuously, its special teflon clad just has been worn, the original surface that exposes inward turning bobbin case and outward turning bobbin case, its result, the mean value of balling-up frequency and broken string frequency is more taller than the value shown in the table 1.Therefore, the comparative example B that coats special teflon is described, its durability is bad.The comparative example C that chromium coating is arranged, through 1000 hours make operation continuously, its chromium coating has just worn away, and exposes the original surface of inward turning bobbin case and outward turning bobbin case, its result, the mean value of the frequency of balling-up and the frequency of broken string can rise more than the value shown in the table 1.Therefore, the comparative example C of chromium coating is arranged, its durability also is bad.So embodiment A is aspect durability, and is better than comparative example B and comparative example C.
The present invention is not limited to above-mentioned Fig. 1～inward turning bobbin case 1, outward turning bobbin case 10 and bobbin case 14 shown in Figure 3.
Can both well be implemented on peg or spindle 30 shown in Figure 6, thread take-up tension lever 40 shown in Figure 7, presser feet 50 shown in Figure 3, the rotating shuttle frame 60 that partly turns round rotating shuttle shown in Figure 9 and the rotating shuttle bar 70 that partly turns round rotating shuttle shown in Figure 10.
Claims (1)
1. the full circle swinging rotating shuttle shell of a Sewing machines is characterized in that it comprises:
The inward turning bobbin case, this inward turning bobbin case has the receiving room of taking in bobbin case, form guide rail on the periphery of this inward turning bobbin case, adhered to by plasma spray method evaporation in its surface and form the clad that only is made of titanium nitride, the hardness of this titanium nitride clad is 1000～2000 Brinell hardness;
The outward turning bobbin case, this outward turning bobbin case has the receiving room of taking in above-mentioned inward turning bobbin case, on the interior week of this outward turning bobbin case, form the guide rail groove, this guide rail channel shaped becomes the size of the guide rail of the above-mentioned inward turning bobbin case of supporting, adhered to by plasma spray method evaporation on the surface of this outward turning bobbin case and form the clad that only is made of titanium nitride, the hardness of this titanium nitride clad is 1000～2000 Brinell hardness;
Bobbin case, this bobbin case has bobbin case is remained on shuttle door closure device in the receiving room of above-mentioned inward turning bobbin case, adhered to by plasma spray method evaporation on the surface of this bobbin case and form the clad that only is made of titanium nitride, this clad has 1000～2000 Brinell hardness;
The full circle swinging rotating shuttle shell of Sewing machines by above-mentioned bobbin case be accommodated in the above-mentioned inward turning bobbin case, the inward turning bobbin case of taking in above-mentioned bobbin case is accommodated in the above-mentioned outward turning bobbin case and constitute;
Prevent the generation of breaking by reducing coefficient of friction between outward turning bobbin case, inward turning bobbin case and the bobbin case, and, by having hardness and the mar proof that constitutes by titanium nitride, improve the durability of above-mentioned outward turning bobbin case, inward turning bobbin case and bobbin case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93101180 CN1039547C (en) | 1993-01-13 | 1993-01-13 | Unit of sewing maching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93101180 CN1039547C (en) | 1993-01-13 | 1993-01-13 | Unit of sewing maching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1090609A CN1090609A (en) | 1994-08-10 |
| CN1039547C true CN1039547C (en) | 1998-08-19 |
Family
ID=4983450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93101180 Expired - Lifetime CN1039547C (en) | 1993-01-13 | 1993-01-13 | Unit of sewing maching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039547C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072289C (en) * | 1996-08-01 | 2001-10-03 | 高桥重雄 | Non-oiling bobbin case for sewing machine |
| KR100378979B1 (en) * | 2000-08-31 | 2003-04-11 | 코베스트 주식회사 | bobbin case of rotary shuttle device for sewing machine |
| CN101134220B (en) * | 2006-08-29 | 2011-01-19 | 徐凤南 | Technique of processing sewing machine shuttle putamen stay wire bore ram compression angle and mold thereof |
-
1993
- 1993-01-13 CN CN 93101180 patent/CN1039547C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1090609A (en) | 1994-08-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130113 Granted publication date: 19980819 |