CN1236878C - Needls and manufacturing method thereof - Google Patents
Needls and manufacturing method thereof Download PDFInfo
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- CN1236878C CN1236878C CN 99111882 CN99111882A CN1236878C CN 1236878 C CN1236878 C CN 1236878C CN 99111882 CN99111882 CN 99111882 CN 99111882 A CN99111882 A CN 99111882A CN 1236878 C CN1236878 C CN 1236878C
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Abstract
The aim of the present invention is to enhance the abrasion resistance of the needle surface and greatly enhance the endurance of the needle surface. The needle maintains large buckling rigidity, and high-quality sewing needles basically having no folding accidents are formed. The needle has the advantages of easy manufacture, high productivity and low manufacturing cost. Shots whose hardness is at least larger than that of parent materials of metal needles are in shot cold hardening from a handle through a conical part comprising the surface of a needle main body of a needle tip. Thus, the needles, such as high-quality sewing needles which have large buckling rigidity and basically have no folding accidents, etc., are formed.
Description
Technical field
The present invention relates generally to the pin class and the manufacture method thereof of sewing needle, knitting needle or felting needle etc., particularly relate to that the metal needle mother metal that makes carbon steel hardens and the pin class and the manufacture method thereof of the sewing needle made etc. by surface treatment processing.
Background technology
In the past, people know, in the occasion of making sewing needle, by metal wire rod is carried out machining, or form sewing needle by the punch process of metal wire-drawing being carried out molding operation etc., but in any case, to the local of this metal finished product or all carry out after Q-tempering handles, according to machining operation several or the combined mode of fine finishining it is carried out cold rolling processing with carrying out grinding, grinding operation etc., in addition, implemented and known also being included in this existing operation, carried out peening and handle.
But above-mentioned various operations need spended time, owing to must carry out several operations at various operations position, must handle the pin class successively simultaneously, and inevitable like this cost is higher.
In the surface treatment operation in the processing operation of adopting existing metal wire rod formation pin class, it is necessary operation that the polishing grinding waits fine finishining, but this operation has following shortcoming, and promptly it is complicated, the activity duration that cost is long, method according to operation, the intensity of pin and the quality of pin reduce, and form bad goods, and scrap piece loss is also bigger, productivity can not improve, and manufacturing cost is higher.
In addition, be to form in the processing operation of pin class quench, the heat treatment of tempering, surface texture is carried out peening handle, produce compressive residual stress, the occasion that fatigue strength is increased, has following problems, promptly along with temperature controlling, it is complicated that engineering management becomes, and cost increases, be difficult to acquisition in addition and make us well-content case hardness and fatigue strength, operation task is also relatively poor.
Summary of the invention
The present invention can overcome above-mentioned existing shortcoming, the objective of the invention is to improve the abrasion performance on the surface of pin class, increase considerably durability, as the pin class, it has enough big flexural rigidity, make the pin class of the high-quality sewing needle of not losing accident substantially easily, productivity improves in addition, and manufacturing cost is lower.
According to the present invention, to polish grinding waits fine finishining to omit, make the pin class produce compressive residual stress by the peening processing, fatigue strength is increased, processing operation and engineering management also are easier to, cost reduces, and carries out gratifying stable operation, the pin class that formation can also be turned round at a high speed of making in addition.
In addition, another object of the present invention is to provide a kind of manufacture method of sewing needle, this method can be simply, make following high-quality sewing needle at low cost, this needle set has enough big intensity, can carry out the stable operation of making, can realize the operation of making of high stable, and high-speed running.
An aspect among the present invention relates to following pin, to what form by carbon steel, the surface of the metal needle mother metal of handling through Q-tempering, at least carrying out peening greater than the shot-peening of the hardness of metal needle mother metal by its hardness handles, form surface-treated layer at the outer peripheral face of handling through this peening, towards outer circumferential surface section, its hardness increases gradually from the central part of above-mentioned metal needle mother metal.
In addition, according to feature of the present invention, above-mentioned peening processing layer is to form like this, with at 2.0～5.0kg/cm
2Air pressure in the scope, according to the jet velocity greater than 100m/s, greater than the hardness of metal needle mother metal, the shot-peening of the ceramic particle of particle diameter in the scope of 40～200 μ m sprays, and to handling near the metal surface, forms hardened layer to its hardness.
Particularly, according to one embodiment of the present of invention, form following sewing needle, the outmost surface of wherein above-mentioned metal needle mother metal has chromium coating, by the shot-peening of its hardness greater than the hardness of above-mentioned metal needle mother metal, once more this chrome-plated surface being carried out peening handles, this pin is by the shank portion that is positioned at an end, extend to the pin main body of the other end by taper portion from this shank portion, the needle point that is formed at this pin body front end forms, comprise in addition as the wire casing that partly extends to from above-mentioned needle handle near the surface groove of the continuous concavity at the position of above-mentioned needle point, opposite side at above-mentioned wire casing, from inside groove and the short groove of above-mentioned needle handle part towards the continuous concavity that extends near the position of above-mentioned needle point, the pin hole part that is communicated with above-mentioned wire casing and short groove, thin part in the above-mentioned pin main body between this pin hole part and inside groove, the recess that forms near the position of this pin hole part relatively.
Sewing needle according to embodiments of the invention, it forms like this, promptly to forming by carbon steel, the surface of the metal needle mother metal of handling through Q-tempering, at least carrying out peening greater than the shot-peening of the hardness of metal needle mother metal by its hardness handles, form titanizing at the outer peripheral face of handling through this peening, or the surface-treated layer of chromium plating processing, in addition to this surface-treated layer, at least carrying out peening greater than the shot-peening of the hardness of above-mentioned metal needle mother metal by its hardness handles, from the central part of above-mentioned metal needle mother metal towards outer circumferential surface section, its hardness increases gradually, and above-mentioned peening is handled and to be performed such, with at 2.0～5.0kg/cm
2Air pressure in the scope, according to the jet velocity greater than 100m/s, greater than the hardness of metal needle mother metal, the shot-peening of the ceramic particle of particle diameter in 40～200 mu m ranges sprays, and closely handles during to the metal surface to its hardness.
Particularly, has chromium coating according to outmost surface at above-mentioned metal needle mother metal, once more to this surface, carry out the embodiment of peening processing greater than the shot-peening of metal needle mother metal hardness by its hardness, its surface has higher abrasion performance, durability increases substantially, as pin, it has enough big flexural rigidity, can be used as the high-quality sewing needle of not losing accident substantially, in addition on making, omitted fine finishining such as grinding, the processing operation and the engineering management of pin also are easier to, and cost reduces, carry out the gratifying stable operation of making, can also realize high-speed running.
Description of drawings
Fig. 1 represents the sewing needle of the 1st embodiment of the present invention, and Fig. 1 (a) is for amplifying elevation, and Fig. 1 (b) is its longitudinal sectional drawing, and Fig. 1 (c) is the amplification transverse cross-sectional view along the A-A line, and Fig. 1 (d) is the detailed cross sectional view of the further amplification of its part;
Fig. 2 represents the knitting knitting needle of the 2nd embodiment of the present invention, and Fig. 2 (a) is an amplification profile, and Fig. 2 (b) is the enlarged elevation figure along the B-B line, and Fig. 2 (c) is the detailed cross sectional view of the further amplification of its part;
Fig. 3 represents the felting needle of the 3rd embodiment of the present invention, and Fig. 3 (a) is an amplification profile, and Fig. 3 (b) is the enlarged elevation figure along the C-C line, and Fig. 3 (c) is the detailed cross sectional view of the further amplification of its part.
The specific embodiment
The occasion that embodiments of the invention is described at the example of the sewing needle by Fig. 1, this sewing needle 10 is included in the needle handle part 1 of the end formation of metal needle mother metal, the pin main body 3 of extending to the other end from this needle handle part 1 by taper portion 2, front end in this pin main body 3 forms needle point 4, as the wire casing 5 that extends to from above-mentioned needle handle part 1 near the surface groove of the continuous concavity at the position of above-mentioned needle point, extend to inside groove 6 and short groove 7 at the opposite side of above-mentioned wire casing 5 from above-mentioned needle handle part 1 near the continuous concavity at the position of above-mentioned needle point 4, the pin hole part 8 that is communicated with above-mentioned wire casing 5 and short groove 7, thin part in the above-mentioned pin main body 3 between this pin hole part 8 and inside groove 6, the recess 9 that forms near the position of this pin hole part 8 relatively forms, this metal needle mother metal is to be formed by carbon steel or steel alloy, and through the quenching about 850 ℃, the heat treatment of the tempering about 200 ℃, to the metal needle mother metal that forms by carbon steel, such as comprising from needle handle part 1, by the surface of taper part 2 to the pin main body 3 of needle point 4, at least carrying out peening greater than the shot-peening of the hardness of metal needle mother metal by its hardness handles, form the surface-treated layer 12 of chromium plating or titanizing etc. at the outer peripheral face of handling through this peening 11, in addition to the surface of this surface-treated layer 12, by its hardness at least greater than the shot-peening of the hardness of above-mentioned metal needle mother metal, carrying out peening handles, thereby form outmost surface 13, towards outer circumferential surface section, its hardness increases gradually from the central part of above-mentioned metal needle mother metal.
In this occasion, above-mentioned peening processing is performed such, to form by carbon steel, make various forms of pin classes through heat treated metal needle mother metal, this pin class is received in a plurality of rotating cylinders, makes its upset, and towards the pin class of in this rotating cylinder, overturning, by compressed air shotblasting machine, with at 2.0～5.0kg/cm
2Scope in air pressure, with the jet velocity greater than 100m/s, greater than the hardness of metal needle mother metal, particle diameter sprays at the shot-peening of the ceramic particle of 40～200 mu m ranges to its hardness, near the metal surface of above-mentioned pin class, the time surpasses A according to the rules
1Covert processing of putting realizes the surface sclerosis, thereby productivity is improved, to make than the ground cost.
Promptly, the periphery of the central part of hardness in 600～750Hv scope in the above-mentioned metal needle mother metal is carried out peening to be handled, make its hardness in the scope of 700～820Hv, on this peening treatment surface, form chromium coating in addition, and the periphery of this chromium coating is carried out peening handle, thereby can form the hardened layer of hardness more than 1000Hv.
In addition, above-mentioned peening is handled according to the tube mode, also spray the occasion of compressed-air actuated air mode simultaneously from the nozzle of compressed air shotblasting machine, adopt ceramic particle, after the outer peripheral face 11 of metal needle mother metal is handled, the outer peripheral face 13 of the surface-treated layer 12 that is plated on the above-mentioned chromium coating on this outer peripheral face 11 is carried out peening once more to be handled, because thermal effectiveness, the effect of forging effect and work strengthening, hardness in the zone of the tens of μs downward from the surface reaches the hardness when quenching, its hardness is improved, increase substantially abrasion performance, owing to produce compressive residual stress by the peening processing, thereby be easy to make fatigue strength to increase.
In addition, handle as above-mentioned peening, in the occasion of sewing needle, according to the mode that is in proportion of the sectional area of pin main body, realize that by the injection air pressure of regulating shot-peening greatly the operation of following processing is better, according to batch mode, for each batch, admit 6000～10000, preferably admit 7000～9000, with 30～60 minutes processing time, its integral body is handled, and the pin main body does not produce bending or distortion, the good fine finishining of formation quality.
In this occasion,, then can not reach more than the transformation temperature if air pressure does not reach 2.0kg, also can spend a large amount of processing times, if air pressure is more than 5.0kg in addition, surpasses above-mentioned limit, should consider that then the situation of buckling phenomenon appears in the pin main body of pin class and air pressure is increased.
In addition, can adopt as required a plurality of pin main bodys are lined up row, carry out the mode that peening is handled, to replace above-mentioned tube mode.
Also have, in the embodiment of knitting needle shown in Figure 2 20, comprise that through heat treated metal needle mother metal its front end has the spindle blade 22 of hook 21, this spindle blade has with above-mentioned hook 21 and contacts the rotatable fastening device 27 that leaves and realize opening and closing, and the handle 23 that is positioned at the other end, as 1 embodiment, surface at above-mentioned spindle blade 22, make following outer peripheral face 24 form the outermost side face, this outer peripheral face 24 by its hardness at least greater than the shot-peening of the hardness of metal needle mother metal, carried out the peening processing, or as other embodiment, form surface-treated layer 25 at the outer peripheral face of handling through this peening 24 as required, make the surface of this surface-treated layer 25 form following outermost side face 26 in addition, this face 26 has carried out the peening processing greater than the shot-peening of the hardness of metal needle mother metal at least by its hardness, and towards outer circumferential surface section, the hardness of this pin increases gradually from the central part of above-mentioned metal needle mother metal.
In addition, in the embodiments of figure 3, this pin is suitable for felting needle 30, has pointed needle point 31 through heat treated above-mentioned metal needle mother metal at front end, keep continuously with this needle point 31, extend to form the spindle blade 32 that its cross section is substantially triangular in shape vertically, each crest line along this spindle blade 32, be formed with pointed hangnail 33 according to the rules at interval, the shank 34 that has bending in addition at the other end of spindle blade, as an embodiment, surface at above-mentioned spindle blade 32, make following outer peripheral face 35 form the outermost side face of this pin, this outer peripheral face 35 by its hardness at least greater than the shot-peening of the hardness of metal needle mother metal, carrying out peening handles, as other embodiment, in the manner described above, on the outer peripheral face of handling through peening 35, form surface-treated layer 36 again, to the surface of this surface-treated layer 36 further by its hardness at least greater than the shot-peening of the hardness of metal needle mother metal, carrying out peening handles, make this surface form the outermost side face 37 of this pin, towards outer circumferential surface section, the hardness of this pin increases gradually from the central part of the metal needle mother metal of above-mentioned felting needle 30.
In addition, for above-mentioned knit goods knitting needle 20 or felting needle 30, also can not carry out electroplating processes such as chromium plating, but form following outermost side face, omit surface-treated layer, this outermost side face, carries out peening and handles at least greater than the shot-peening of the hardness of metal needle mother metal by its hardness.
After the pin class of these embodiment is carried out the heat treatment of Q-tempering, under normal temperature or high temperature, carry out shot-peening processing, the tissue of metal needle near surface is changed, form following metal needle finished product thus, it produces compressive residual stress, fatigue strength increases, and has higher surface hardness.Owing to handle greater than the above-mentioned peening that the shot-peening of the hardness of metal needle mother metal carries out by its hardness, if the shot-peening particle diameter is reduced, then jet velocity increases, the injected surface of the metal needle finished product of thing to be processed produces heat simultaneously, and injected surface temperature increases along with jet velocity and rises.
Promptly, forming the ceramic particle of above-mentioned shot-peening particle diameter in the scope of 40～200 μ m is because consider, because the relation between jet velocity and the jet velocity, in order to improve jet velocity, can not increase the particle diameter of shot-peening, if injection density is lower, even because under the situation that expulsion pressure increases, machined layer is still inhomogeneous, so should avoid this situation, minimizing is to the influence of the roughness of the work surface of finished product.
In addition, in occasion from the nozzle of peening treating apparatus and the common air shot-peening formula of spraying of compressed air, by reducing the particle diameter of shot-peening, be easier to by the compressed air carrier band, be easy to form jet velocity up to 200m/s, injection density is increased, injected temperature of metal needle finished product rises also in 750～900 ℃ scope, can also reach more than 900 ℃ in moment at an easy rate, thereby can form following metal needle finished product, the transformation temperature that it surpasses metal has high case hardness.In this occasion, the jet length of said nozzle is preferably in the scope of 150～200mm, is preferably in the scope of 160～180mm.
Handle by peening, the metal needle finished product is heated, in the scope of 10～30 μ m on top layer, austenite changes martensite into, and the hardness of this layer is higher, and the bottom, top layer is changed bainite and/or tempered martensite into, acquisition hardness is higher, and the tissue with toughness can make the fine finishining on surface even in addition effectively, forms the fine finishining on level and smooth surface.
Peening by above-mentioned ceramic hollow particle (1000Hv) is handled the sewing needle A of the present invention that obtains, compared through the heat treated sewing needle B of existing Q-tempering, the sewing needle of peening processing through being undertaken by existing bead, and the measurement result of hole slip value, intensity (hardness, distortion, break, rigidity) is listed in the table 1.
Table 1
In addition, for sewing needle A of the present invention, compare with existing sewing needle B, C, the relative sewing needle B of its hole slip value increases by 200～380%, and sewing needle C increases by 260～900% relatively.
Also have, by intensity relatively (hardness, crooked residual deformation, lose angle break, bending rigidity value), can confirm that following non-chance is poor, be the relative sewing needle B of its hardness, 40～50Hv rises, relative sewing needle C, case hardness increases 80Hv, and can confirm to form crooked residual deformation, lose the angle break, finished product that the bending rigidity value does not have difference basically.
In addition, same with regard to the epidermis of surface configuration, concerning sewing needle A of the present invention, with existing sewing needle B, C compares, form the less thinner uniform epidermis of protuberance, equally performance relatively [is run through resistance, the non-cementability of the hot temperature of pin (pin temperature)], as shown in table 2, it is equal running through the hot temperature of resistance and pin, for non-cementability, with at existing sewing needle B, among the C, being to begin to produce bonding under 1800 the condition in sewing machine rotation time amount, or is to produce fully bonding situation under 2000 the condition to compare in above-mentioned number of revolutions, relatively in sewing needle A of the present invention, be to begin to produce bonding under 2000 the condition in sewing machine rotation quantity,, can expect to make the raising of operation so confirm that just non-chance is poor.
Table 2
The present invention is by to being formed by carbon steel, the surface of the metal needle mother metal of handling through Q-tempering, at least carrying out peening greater than the shot-peening of the hardness of metal needle mother metal by its hardness handles, the hardness that makes this pin increases towards outer circumferential surface section gradually from the central part of above-mentioned metal needle mother metal, thereby the abrasion performance on the surface of pin class improves, its durability increases considerably, the pin class keeps the enough big rigidity of buckling, substantially do not lose accident, the gratifying stable operation of making can form the pin class of the high-quality sewing needle that can also turn round at a high speed etc.
In addition,,, this pin class is received in a plurality of tubes, overturns, towards the pin class that in this rotating cylinder, realizes upset, with 2.0～5.0Kg/cm by the various forms of pin classes that the metal needle mother metal that formed by carbon steel is formed according to the present invention
2Air pressure, according to jet velocity greater than 100m/s, from its hardness of nozzle ejection greater than the hardness of above-mentioned metal needle mother metal, the shot-peening of the ceramic particle of particle diameter in the scope of 40～200 μ m, to near time according to the rules metal surface of above-mentioned pin class, surpass A
1The peening of transition point handle, the manufacturing needles class, omitted fine finishining such as polishing thus, in the pin class, produced compressive residual stress, fatigue strength is increased, processing operation and engineering management also are easy to, cost reduces, and carries out the well-content stable various operations such as operation of making, can be simply, manufacturing at low cost can also be turned round the pin class that productivity is also higher at a high speed.
Table 1
Hole slip value and strength detection comparison sheet
| Pin A of the present invention | Existing example pin B | Existing example pin C | ||
| Hole slip value (number of times) | After chemical grinding is handled | 481.2 | 234.8 | 311.4 |
| After the plating | 303.2 | 116.4 | 214.4 | |
| Hardness | Electroplate back (Hv) | 833.0 | 740.4 | 759.6 |
| Residual deformation | Electroplate back (mm) | 0.0154 | 0.0110 | 0.0136 |
| Break | Electroplate back (angle) | 17.00 | 20.70 | 20.68 |
| Rigidity | After the plating | 649.8 | 675.2 | 690.0 |
Table 2
The performance comparison sheet
| Pin A of the present invention | The pin B of existing example | The pin C of existing example | |
| Run through resistance (kg f) | 0.551 | 0.531 | 0.535 |
| The hot temperature of pin (℃) | 259.7 | 256.6 | 257.2 |
| Non-cementability (sewing machine number of revolutions) | 2000 | 1600 | 1800 |
Claims (11)
1. pin, it is characterized in that forming by carbon steel, the surface of the metal needle mother metal of handling through Q-tempering, at least carrying out peening greater than the shot-peening of the hardness of metal needle mother metal by its hardness handles, form surface-treated layer at the outer peripheral face of handling through this peening, towards outer circumferential surface section, its hardness increases gradually from the central part of above-mentioned metal needle mother metal.
2. pin according to claim 1 is characterized in that above-mentioned peening is handled to be performed such, with at 2.0～5.0kg/cm
2Air pressure in the scope, according to the jet velocity greater than 100m/s, greater than the hardness of metal needle mother metal, the shot-peening of the ceramic particle of particle diameter in the scope of 40～200 μ m sprays to its hardness, with greater than A
1Transition point to handling near the metal surface.
3. pin according to claim 1 and 2, it is characterized in that above-mentioned metal needle mother metal is by the shank portion that is positioned at an end, extend to the pin main body of the other end by taper portion from this shank portion, the needle point that is formed at this pin body front end forms, comprise in addition as the wire casing that partly extends to from above-mentioned needle handle near the surface groove of the continuous concavity at the position of above-mentioned needle point, at the opposite side of above-mentioned wire casing from inside groove and the short groove of above-mentioned needle handle part towards the continuous concavity that extends near the position of above-mentioned needle point, the pin hole part that is communicated with above-mentioned wire casing and short groove, thin part in the above-mentioned pin main body between this pin hole part and inside groove, the recess that forms near the position of this pin hole part relatively.
4. pin according to claim 1 is characterized in that, described surface-treated layer has carried out the peening processing greater than the shot-peening of the hardness of metal needle mother metal at least by its hardness,
5. pin according to claim 4 is characterized in that above-mentioned peening is handled to be performed such, with at 2.0～5.0kg/cm
2The scope inner air pressure, according to the jet velocity greater than 100m/s, greater than the hardness of metal needle mother metal, the shot-peening of the ceramic particle of particle diameter in the scope of 40～200 μ m sprays to its hardness, with greater than A
1Transition point to handling near the metal surface.
6. according to claim 4 or 5 described pins, it is characterized in that above-mentioned metal needle mother metal is by the shank portion that is positioned at an end, extend to the pin main body of the other end by taper portion from this shank portion, the needle point that is formed at this pin body front end forms, comprise in addition as the wire casing that partly extends to from above-mentioned needle handle near the surface groove of the continuous concavity at the position of above-mentioned needle point, at the opposite side of above-mentioned wire casing from inside groove and the short groove of above-mentioned needle handle part towards the continuous concavity that extends near the position of above-mentioned needle point, the pin hole part that is communicated with above-mentioned wire casing and short groove, thin part in the above-mentioned pin main body between this pin hole part and inside groove, the recess that forms near the position of this pin hole part relatively.
7. pin according to claim 1 is characterized in that, described pin is the knit goods knitting needles, and its front end has hook, comprises in addition with this hook realizing rotatable fastening device that opens and closes and the handle that is positioned at the other end to contact the mode of leaving.
8. pin according to claim 1, it is characterized in that, described pin is a felting needle, has pointed needle point at front end, keep extending to form the spindle blade that its cross section is substantially triangular in shape vertically, on each crest line of this spindle blade continuously with this needle point, spacing is formed with pointed barb according to the rules, and the other end at spindle blade has crooked shank in addition.
9. the manufacture method of a pin forms various forms of pins with the metal needle mother metal that is formed by carbon steel, and this pin is received in a plurality of rotating cylinders, makes its upset, and towards the pin that overturns in this rotating cylinder, with at 2.0～5.0kg/cm
2Air pressure in the scope, according to jet velocity greater than 100m/s, greater than the hardness of metal needle mother metal, the shot-peening of the ceramic particle of particle diameter in the scope of 40～200 μ m surpasses A near the metal surface of time to above-mentioned pin according to the rules from its hardness of nozzle ejection
1The processing of transition point.
10. manufacture method according to claim 9, it is characterized in that above-mentioned peening processing is in the occasion of also spraying compressed-air actuated air mode from nozzle, adopt ceramic particle, after the outer peripheral face to the metal needle mother metal carries out the peening processing, this outer peripheral face is carried out chromium plating handle, the outer peripheral face to above-mentioned chromium coating carries out the peening processing in addition.
11. according to claim 9 or 10 described manufacture methods, it is characterized in that above-mentioned peening handle be according to the mode that is in proportion of the sectional area of pin main body, undertaken by the injection air pressure of adjusting shot-peening, according to batch mode, for per 1 batch processing 30～60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99111882 CN1236878C (en) | 1999-08-03 | 1999-08-03 | Needls and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99111882 CN1236878C (en) | 1999-08-03 | 1999-08-03 | Needls and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1282639A CN1282639A (en) | 2001-02-07 |
| CN1236878C true CN1236878C (en) | 2006-01-18 |
Family
ID=5275332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99111882 Expired - Fee Related CN1236878C (en) | 1999-08-03 | 1999-08-03 | Needls and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1236878C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324151C (en) * | 2004-04-27 | 2007-07-04 | 东华大学 | Guipure furnace knitting needle brightness quench technics parameter determining method |
| CN101633977B (en) * | 2009-05-08 | 2014-02-19 | 青岛优耐尔精密织针有限公司 | Method for vacuum hardening of knitting needle of circular knitting machine |
| CN103264127B (en) * | 2013-05-23 | 2014-12-10 | 三门峡鑫宏精密纺织器材有限公司 | Three-station automatic pressing aligned-cutting needle making machine |
| PT2886668T (en) | 2013-12-19 | 2019-02-04 | Groz Beckert Kg | Textile tool and manufacturing method for the same |
| CN107345342A (en) * | 2017-07-04 | 2017-11-14 | 杰克缝纫机股份有限公司 | A kind of presser feet of sewing machine |
| PT3483319T (en) * | 2017-11-09 | 2022-02-14 | Groz Beckert Kg | Textile tool with indicator film |
| CN109302861B (en) * | 2018-11-29 | 2022-05-03 | 马鞍山市绿之友机械制造有限公司 | Side soil discharging perforating needle and processing method thereof |
-
1999
- 1999-08-03 CN CN 99111882 patent/CN1236878C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1282639A (en) | 2001-02-07 |
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