CN101130875A - Circular knitter cylinder and its manufacturing method - Google Patents
Circular knitter cylinder and its manufacturing method Download PDFInfo
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- CN101130875A CN101130875A CNA2006101115154A CN200610111515A CN101130875A CN 101130875 A CN101130875 A CN 101130875A CN A2006101115154 A CNA2006101115154 A CN A2006101115154A CN 200610111515 A CN200610111515 A CN 200610111515A CN 101130875 A CN101130875 A CN 101130875A
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Abstract
The present invention relates to a needle cylinder of round knitting machine and its production method. It is characterized by that a covering layer made of special material is formed on the surface of needle cylinder, and said covering layer mainly is a settled layer of nickel material, and its production method includes degreasing process, acid neutralization process, electrolytic grinding process, alkali neutralization process, activating acid process, covering layer settling process and drying process.
Description
Technical field
The present invention is relevant a kind of circular knitter cylinder and manufacture method thereof, refers to that especially a kind of coating layer of an exotic materials that can form on the surface is to improve the circular knitter cylinder and the manufacture method thereof of surfaceness and abrasion performance characteristic.
Background technology
Press, circular knitting machine is that a kind of quilt extensively applies to the mass-produced facility of knitting cloth, and the more fine needle knitting machine of total needle amount of existing circular knitting machine-especially, many because of the guide pin groove number that is provided with on its syringe, groove is narrow, so the forming process of these grooves has high degree of difficulty, and finished product are often not good because of mechanical characteristicies such as precision deficiency or surface roughness, abrasion performance degree, so that the facility running time produces many unfavorable shortcomings.
In the time of early, knitting needle guide channel processing mode on the circular knitter cylinder, be that direct mode with deep stria forms the knitting needle guide channel, not only machining is time-consuming for right this mode, and the stress regular meeting that adds man-hour makes the partition wall between each knitting needle guide channel produce strain, its precision size degree is because of the various unanimity that is difficult to of cutting guide channel number in addition, when thermal treatment, also be very easy to cause the distortion of knitting needle guide channel partition again, institute thinks the saving tooling cost and guarantees quality of finished, general neither directly the mode of guide channel milling out of the ordinary is processed, and it is extremely shown in Figure 6 as Fig. 3, the knitter cylinder manufacture of industry employing at present is the configuration of elder generation with top cylinder roughing Cheng Suoxu, five equilibrium is radially offered the inserted sheet groove of some roads required sinker (SINKER) guide channel and knitting needle guide channel both sides according to setting knitting number in the position of knitting needle guide channel predetermined set again, again will be in advance through the guide channel partition of special processing one by one among these inserted sheet grooves of build-in, grind sinker guide channel and guide channel partition then to required size, and finish the knitting needle guide channel processing and manufacturing of syringe; Yet in aforementioned manufacturing processed, those sinker guide channel and guide channel partitions after milling or attrition process on the syringe, often have the situation that burr are residual or formation part surface rugosity (Surface Rounghness) is uneven (as with reference to shown in Figure 1), in addition, also cause the distortion of knitting needle guide channel partition after the syringe thermal treatment through regular meeting, this result will cause high speed start members such as sinker to produce tight pin in knitting operation, the situation of card pin, this component interference phenomenon takes place not only can make the cloth that weaves produce the vertical bar flaw, hook yarn yarn bifurcated, fracture or flaw such as fluffing and seriously reduce product quality, also can cause the associated components high wear and reduce facility work-ing life, even cause member to damage, the puzzlement that machine can't operate; Again, above-mentioned every shortcoming-especially is for the ultra fine needle knitting machine of those high total needle amounts, and problem will be more obviously and serious (with reference to figure 7 and Fig. 8).
In order to solve these shortcomings, normally the syringe of finishing machining is carried out again the procedure of processing of deflashing and/or polishing, utilize the processing mode that polishing wheel or jet grinding clean so that remove burr and promote the surface flatness of knitting needle guide channel; Yet according to processing experience in the past, use the open flat surfaces position that polishing wheel (its material is steel wire or copper wire or emery cloth etc.) only can grinding work-piece, and can't go deep into the inner surface (as with reference to shown in Figure 2) of narrow and small hole such as guide channel; And the clean mode of jet grinding is to use superfine sand grains as the lotion medium, though can clean to the inner surface jet grinding of narrow and small holes such as guide channel, but the residual problem of fines is arranged, often after processing, must expend many times and manpower and clear up and check the fine sand of confirming noresidue, because if residual fines is not cleared up cleaning, equally can derive foregoing every shortcoming.
Summary of the invention
The object of the invention is to address the above problem, provides a kind of improved circular knitter cylinder, mainly be to be provided with a coating layer on the surface of this syringe, by the mechanical characteristicies such as good surface rugosity (Ra), high rigidity and high abrasion consumption degree that this coating layer possessed, Flatness, slickness and the wear resistance on sinker guide channel on the syringe and knitting needle guide channel surface are all obtained significantly promoted, get rid of known syringe because of the unfavorable feature of factors such as burr or surface irregularity institute deutero-at one stroke.
According to the present invention, the area of this coating layer institute coating comprises the surface at sinker guide channel and knitting needle guide channel position at least.Wherein, this coating layer can be a ni-p alloy coating or the compound nickel dam of nickel phosphorus-Teflon, nickel phosphorus-silicon carbide compound nickel dam, the compound nickel dam of nickel phosphorus-diamond, and this coating layer is coated on this needle cylinder surface equably, best, the thickness of this coating layer is more than 10 μ m, be to belong to the amorphousness crystallizing layer because of this coating layer again, so at this coating layer surface pore-free, glossiness is excellent and tool nature oilness, the abrasion performance degree is more than 10mg/1000rpm, and hardness Yue Keda 350-500HV above (as after heat treatment reaching more than the 600-1000HV).
In addition, the present invention also further provides a kind of manufacture method of circular knitter cylinder, and it comprises:
A, provide a syringe workpiece of having finished cutting forming processing, best, this syringe is also through preliminary surface treatment (as removing burr or grinding and polishing).
B, degreasing processing procedure: be with degreasing fluid the top layer of syringe workpiece to be implemented to clean, after the dipping bath, syringe is immersed in the ultrasonic degreasing liquid bath again ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove.
C, neutralizing acid processing procedure: will in the syringe workpiece of aforementioned degreasing processing procedure immerses the tank of circulation overflow, clean, and again this syringe be immersed in neutralizing acid liquid bath, and remain in the acidity of the degreasing fluid of this syringe workpiece surface with neutralization.
D, the electrolytic polishing processing procedure: will through the syringe workpiece of neutralizing acid processing procedure immerse clean in the tank of circulation overflow after, immerse the ultrasonic wave washing bath again so that ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove, syringe workpiece after will cleaning then immerses and is filled with in the electrolytic polishing groove of electrolytic solution, make this syringe electricity be connected to a positive electrode, and near these syringe outer peripheral edges, be provided with the corresponding negative electrode of body, again according to indivedual syringe sizes specifications, and selectively between positive and negative electrode, bestow suitable voltage, electric current and electrolysis time, make the reaction of syringe workpiece surface generation anode electrolysis, with removal burr and deep clean workpiece surface, and reach planarization, the effect of glossization and passivation; Generally speaking, the workpiece behind the electrolytic polishing processing procedure improves the workpiece surface rugosity usually and can reach 25-50%.
E, neutralization bases processing procedure: the syringe workpiece that will finish the electrolytic polishing processing procedure immerses in the tank of circulation overflow to be cleaned, and this syringe is immersed in neutralization bases liquid bath again, remains in the alkalescence of the electrolytic solution of syringe workpiece surface with neutralization.
F, activated acids processing procedure: will immerse in the tank of circulation overflow through the syringe workpiece of aforementioned neutralization bases processing procedure and clean, and again syringe be immersed in the activated acids liquid bath to improve the sticking power of syringe workpiece surface.
The deposition manufacture process of G, coating layer: the syringe workpiece that will finish the activated acids processing procedure immerses in the pure water groove of circulation overflow to be cleaned, syringe workpiece after will purifying then is immersed in the immersion plating groove of the chemical plating fluid of selecting for use (for example acid nickel-phosphor bath), under 70-110 ℃ temperature condition, redoxomorphism by this chemical plating fluid, and the deposition of nickel-phosphorus alloy is carried out in the metallic surface of syringe workpiece, to form a nickel-phosphorus alloy coating layer.
Again, aforementioned chemical plating fluid also can be selected the compound nickel plating bath of nickel phosphorus-Teflon, nickel phosphorus-silicon carbide compound nickel plating bath, nickel phosphorus-Ceramic Composite nickel plating bath or the compound nickel plating bath of nickel phosphorus-diamond for use, also utilize the sedimentary mode of chemical nickel and micropartical such as Teflon/silicon carbide/diamond and nickel phosphorus gold belonged to separate out (Co-deposit) jointly and be plated on the workpiece surface,, more abrasion performance or have more the metallic surface of oilness harder to obtain.
In the deposition manufacture process of aforementioned coating layer, can control the thickness that this coating layer forms by the length of controlling the immersion plating time.
H, drying process: the syringe workpiece that will finish the deposition manufacture process of coating layer immerses in the pure water groove of circulation overflow to be cleaned, immerse again in the washing trough of ultrasonic wave pure water, ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove, after after draining and the moisture of residual needle cylinder surface being dried up with jet-stream wind, again syringe is bestowed high bake up to drying.
Via the practice of aforementioned processing procedure, can have the coating layer of characteristics such as good surface rugosity, high rigidity and high abrasion consumption degree concurrently in the surface of this syringe formation one.
And the present invention is not limited to the above form; clearly; with regard to haveing the knack of this technology personage; after the above-mentioned explanation of reference; more improvement and variation can be arranged, be with, all have in that identical creation spirit is following do relevant any modification of the present invention or change; all must be included in the category that the invention is intended to protect, and give Chen Ming.And will go on to say with a specific embodiment after being next to, further to illustrate character of innovation of the present invention.
Description of drawings
Below, will be that the embodiment of the invention is made nearly step explanation with the manufacture method that forms a nickel-phosphorus alloy coating layer at needle cylinder surface, wherein:
Figure 1 shows that procedure of processing schema of the present invention;
Fig. 2 is the diagrammatic cross-section of the sinker guide channel on the syringe of the present invention;
Fig. 3 is the schematic perspective view of syringe, and the guide channel of demonstration syringe machining is finished;
Fig. 4 is the stereographic map of guide channel partition;
Fig. 5 is the side sectional view of syringe, show the guide channel partition by build-in among the inserted sheet groove; And
Fig. 6 is the part vertical view of syringe;
Fig. 7 is the accompanying drawing of the sinker guide channel residual burr after Milling Process on the syringe;
Fig. 8 is the figure of needle cylinder surface after polishing wheel is handled, and shows that the burr of sinker guide channel inner surface can't be removed;
Fig. 9 is sinker guide channel figure on the syringe after the manufacture method processing of the present invention, shows that the burr of sinker guide channel inner surface have been removed and have been the surface of smooth planar.
Embodiment
The explanation of most preferred embodiment
As shown in Figure 1, the manufacture method of circular knitter cylinder of the present invention slightly is to process and to have done deposition manufacture process → drying process that preliminary surface-treated syringe workpiece applies degreasing processing procedure → neutralizing acid processing procedure → electrolytic polishing processing procedure → neutralization bases processing procedure → activated acids processing procedure → coating layer in regular turn through finishing cutting forming, utilize this manufacture method can form the coating layer of a uniform thickness, and this coating layer have characteristics such as good surface roughness, high rigidity and high abrasion consumption degree on the surface of this syringe.
Wherein, the operation of this degreasing processing procedure is after earlier the surface of syringe workpiece being imposed the about 60-95 of temperature ℃ degreasing fluid and scrubs clean, about more than 5 minutes in this degreasing fluid of dipping bath again, again syringe is immersed in the about 40-80 of temperature ℃ the ultrasonic degreasing liquid bath about more than 3 minutes afterwards, and each position of needle cylinder surface layer and groove bestowed ultrasonic cleansing, so that this syringe workpiece surface has good hydrophilicity.
This neutralizing acid processing procedure is that the syringe workpiece that will finish aforementioned degreasing processing procedure immerses in the tank of circulation overflow, at room temperature continue dipping bath more than 1 minute, in again this syringe being immersed and in acid solution (sulfuric acid or the hydrochloric acid) groove about 1-8 minute, remain in the acidity of the degreasing fluid of this syringe workpiece surface with neutralization.
And the electrolytic polishing processing procedure is that the syringe workpiece through the neutralizing acid processing procedure is immersed in the tank of circulation overflow, at room temperature continue dipping bath more than 1 minute, immerse again in the ultrasonic wave washing bath, ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove, syringe workpiece after will cleaning then immerses and is filled with in the electrolytic polishing groove of electrolytic solution (sulfuric acid or phosphoric acid), make this syringe electricity be connected to a positive electrode, and near these syringe outer peripheral edges, be provided with the corresponding negative electrode of body, again according to indivedual syringe sizes specifications, and selectively between positive and negative electrode, bestow suitable voltage, electric current and electrolysis time (generally about 5-30 minute), make the reaction of syringe workpiece surface generation anode electrolysis, with removal burr and deep clean workpiece surface, and reach planarization, the effect of glossization and passivation (with reference to figure 9).
The neutralization bases processing procedure is that the syringe workpiece that will finish the electrolytic polishing processing procedure immerses in the tank of circulation overflow, at room temperature continue dipping bath more than 1 minute, in again this syringe being immersed and about more than 1 minute in alkali lye (sodium hydroxide) groove, remain in the alkalescence of the electrolytic solution of syringe workpiece surface with neutralization.
The activated acids processing procedure is that the syringe workpiece through aforementioned neutralization bases processing procedure is immersed in the tank of circulation overflow, at room temperature continue dipping bath more than 1 minute, with about more than 1 minute in syringe immersion activation acid solution (sulfuric acid) groove, improve the sticking power of syringe workpiece surface according to this again.
The deposition manufacture process of the coating layer that continues is that the syringe worker who finishes the activated acids processing procedure is immersed in the pure water groove of circulation overflow, at room temperature continue dipping bath more than 1 minute, syringe workpiece after will purifying then is immersed in the immersion plating groove of acid nickel-phosphor bath for example, under 70-110 ℃ temperature condition, select for use sodium hypophosphite as deoxidizer, redoxomorphism by this plating bath, and the syringe workpiece surface is carried out the deposition of nickel-phosphorus alloy, usually continue approximately during the immersion plating more than 35 minutes, can be deposited as thickness more than 10 μ m, and the nickel-phosphorus alloy coating layer that contains 88-94% nickel and 6-12% phosphorus.
Last drying process is that the syringe workpiece that will finish the deposition manufacture process of coating layer immerses in the pure water groove of circulation overflow, at room temperature continue dipping bath more than 1 minute, immerse again in the washing trough of ultrasonic wave pure water, ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove, then the syringe workpiece being hung the washing trough of ultrasonic wave pure water drains, and after the moisture of residual needle cylinder surface dried up with jet-stream wind, again syringe is bestowed high bake more than 120 ℃, continue more than 1 hour.
Foregoing manufacture method of the present invention can form a coating layer 2 with excellent mechanical properties on this syringe 1 surface, especially can significantly promote the Flatness on narrow and small line of rabbet joint surfaces such as sinker guide channel on the syringe and knitting needle guide channel 13, slickness and wear resistance (as Fig. 2 and with reference to shown in Figure 3), reduce the abrasion when operating between the guide channel on sinker and the syringe according to this, promote the work-ing life of facility member, and it is smooth and easy more noiseless to allow knitting needle process when operating, simultaneously also can significantly promote syringe process rate and quality of finished and precision, can be rated as a creation that has a practical value in fact by the present invention.Can form a coating layer 2 with excellent mechanical properties on this syringe 1 surface through preceding described manufacture method of the present invention.
And for example Fig. 2 and reference are shown in Figure 3, circular knitter cylinder provided by the present invention is to have a coating layer 2 on the surface of this syringe 1, this coating layer can be selected a ni-p alloy coating or the compound nickel dam of nickel phosphorus-Teflon for use, nickel phosphorus-silicon carbide compound nickel dam, the compound nickel dam of nickel phosphorus-diamond, and being coating at least, this coating layer comprises the surface at positions such as sinker guide channel on this syringe and knitting needle guide channel 13, and the thickness that makes this coating layer is more than 10 μ m, the high rigidity that this coating layer 2 is possessed, high abrasion resistance and surperficial pore-free, special mechanical propertiess such as the excellent and tool of glossiness nature oilness, abrasion when operating between the guide channel on sinker and the syringe to reduce, promote the work-ing life of facility member, and it is smooth and easy more noiseless to allow knitting needle process when operating.
Claims (7)
1. the manufacture method of a circular knitter cylinder, can be at this needle cylinder surface one especially narrow and small line of rabbet joint surface such as sinker guide channel on syringe and knitting needle guide channel, form a coating layer with good Flatness, slickness and wear resistance, it is characterized in that its procedure of processing comprises:
A, provide a syringe workpiece of having finished cutting forming processing;
B, degreasing processing procedure: be with degreasing fluid the top layer of syringe workpiece to be implemented to clean, after the dipping bath, syringe is immersed in the ultrasonic degreasing liquid bath again ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove;
C, neutralizing acid processing procedure: will in the syringe workpiece of aforementioned degreasing processing procedure immerses the tank of circulation overflow, clean, and again this syringe be immersed in neutralizing acid liquid bath, and remain in the acidity of the degreasing fluid of this syringe workpiece surface with neutralization;
D, activated acids processing procedure: will immerse in the tank of circulation overflow through the syringe workpiece of preceding paragraph processing procedure and clean, and again syringe be immersed in the activated acids liquid bath to improve the sticking power of syringe workpiece surface;
The deposition manufacture process of E, coating layer: the syringe workpiece that will finish the activated acids processing procedure immerses in the pure water groove of circulation overflow to be cleaned, syringe workpiece after will purifying then is immersed in the immersion plating groove of the chemical plating fluid of selecting for use, under 70～110 ℃ temperature condition, redoxomorphism by this chemical plating fluid, and the metallic surface of syringe workpiece is carried out the deposition of alloy molecule, forming an alloy coating layer, and control the thickness that this coating layer forms by the length of controlling the immersion plating time; And
F, drying process: the syringe workpiece that will finish the deposition manufacture process of coating layer immerses in the pure water groove of circulation overflow to be cleaned, immerse again in the washing trough of ultrasonic wave pure water, ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove, after after draining and the moisture of residual needle cylinder surface being dried up with jet-stream wind, again syringe is bestowed high bake up to drying.
2. as the manufacture method of claim 1 a described circular knitter cylinder, it is characterized in that, wherein, also be included in and implement following procedure for processing between neutralizing acid processing procedure and the activated acids processing procedure:
The electrolytic polishing processing procedure: will through the syringe workpiece of neutralizing acid processing procedure immerse clean in the tank of circulation overflow after, immerse the ultrasonic wave washing bath again so that ultrasonic cleansing is bestowed at each position of needle cylinder surface layer and groove, syringe workpiece after will cleaning then immerses and is filled with in the electrolytic polishing groove of electrolytic solution, make this syringe electricity be connected to a positive electrode, and near these syringe outer peripheral edges, be provided with the corresponding negative electrode of body, again according to indivedual syringe sizes specifications, and selectively between positive and negative electrode, bestow suitable voltage, electric current and electrolysis time, make the reaction of syringe workpiece surface generation anode electrolysis, with removal burr and deep clean workpiece surface, and reach planarization, the effect of glossization and passivation; And
The neutralization bases processing procedure: the syringe workpiece that will finish the electrolytic polishing processing procedure immerses in the tank of circulation overflow to be cleaned, and this syringe is immersed in neutralization bases liquid bath again, remains in the alkalescence of the electrolytic solution of syringe workpiece surface with neutralization.
3. as the manufacture method of claim 1 a described circular knitter cylinder, it is characterized in that wherein, selected chemical plating fluid is to be acid nickel-phosphor bath in the deposition manufacture process of this coating layer, and can form a nickel-phosphorus alloy coating layer at needle cylinder surface.
4. as the manufacture method of claim 1 a described circular knitter cylinder, it is characterized in that, wherein, selected chemical plating fluid is the compound nickel plating bath of nickel phosphorus-Teflon in the deposition manufacture process of this coating layer, and can form the compound nickelalloy coating layer of a nickel phosphorus-Teflon at needle cylinder surface.
5. as the manufacture method of claim 1 a described circular knitter cylinder, it is characterized in that, wherein, selected chemical plating fluid is nickel phosphorus-Ceramic Composite nickel plating bath in the deposition manufacture process of this coating layer, and can form nickel phosphorus-Ceramic Composite nickelalloy coating layer at needle cylinder surface.
6. as the manufacture method of claim 1 a described circular knitter cylinder, it is characterized in that, wherein, selected chemical plating fluid is the compound nickel plating bath of nickel phosphorus-diamond in the deposition manufacture process of this coating layer, and can form the compound nickelalloy coating layer of a nickel phosphorus-diamond at needle cylinder surface.
7. circular knitter cylinder, mainly be to be provided with a coating layer on the surface of this syringe, particularly the area of this coating layer institute coating comprises the surface at sinker guide channel and knitting needle guide channel position at least, it is characterized in that, this coating layer is to be a ni-p alloy coating or the compound nickel dam of nickel phosphorus-Teflon, nickel phosphorus-silicon carbide compound nickel dam, the compound nickel dam of nickel phosphorus-diamond, and this coating layer is coated on this needle cylinder surface equably, has the above coating layer thickness of 10 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101115154A CN101130875A (en) | 2006-08-21 | 2006-08-21 | Circular knitter cylinder and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101115154A CN101130875A (en) | 2006-08-21 | 2006-08-21 | Circular knitter cylinder and its manufacturing method |
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| CN101130875A true CN101130875A (en) | 2008-02-27 |
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| CNA2006101115154A Pending CN101130875A (en) | 2006-08-21 | 2006-08-21 | Circular knitter cylinder and its manufacturing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| ITMO20120110A1 (en) * | 2012-04-26 | 2013-10-27 | Marcello Galiotto | CLEANING MACHINE FOR NEEDLE-HOLDER PLATES FOR KNITTING MACHINES |
| CN103510326A (en) * | 2012-08-30 | 2014-01-15 | 芜湖海成科技有限公司 | Draw-off godet and manufacturing method thereof |
| CN103608495A (en) * | 2011-06-09 | 2014-02-26 | 东京不锈钢研磨兴业株式会社 | Method for producing steel |
| CN105386117A (en) * | 2015-11-24 | 2016-03-09 | 常州乐奥医疗科技有限公司 | Electrochemical polishing device and method for support |
| CN111519328A (en) * | 2020-04-27 | 2020-08-11 | 苏州禾润智能制造有限公司 | Needle plate of flat knitting machine and processing technology of sinker bed |
-
2006
- 2006-08-21 CN CNA2006101115154A patent/CN101130875A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103608495A (en) * | 2011-06-09 | 2014-02-26 | 东京不锈钢研磨兴业株式会社 | Method for producing steel |
| CN103608495B (en) * | 2011-06-09 | 2016-12-28 | 东京不锈钢研磨兴业株式会社 | The manufacture method of steel |
| ITMO20120110A1 (en) * | 2012-04-26 | 2013-10-27 | Marcello Galiotto | CLEANING MACHINE FOR NEEDLE-HOLDER PLATES FOR KNITTING MACHINES |
| WO2013160817A1 (en) * | 2012-04-26 | 2013-10-31 | Galiotto Marcello | Machine for cleaning needle holder plates for knitting machines |
| RU2624177C2 (en) * | 2012-04-26 | 2017-06-30 | Марчелло ГАЛИОТТО | Machine for knitting machine needle bar plates cleaning |
| CN103510326A (en) * | 2012-08-30 | 2014-01-15 | 芜湖海成科技有限公司 | Draw-off godet and manufacturing method thereof |
| CN103510326B (en) * | 2012-08-30 | 2015-09-02 | 芜湖海成科技有限公司 | A kind of draw-off godet and preparation method thereof |
| CN105386117A (en) * | 2015-11-24 | 2016-03-09 | 常州乐奥医疗科技有限公司 | Electrochemical polishing device and method for support |
| CN111519328A (en) * | 2020-04-27 | 2020-08-11 | 苏州禾润智能制造有限公司 | Needle plate of flat knitting machine and processing technology of sinker bed |
| CN111519328B (en) * | 2020-04-27 | 2022-12-13 | 江苏云编智能科技有限公司 | Processing technology of needle plate or sinker bed of flat knitting machine |
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Application publication date: 20080227 |