CN102847944A - Method for processing yarn guide nozzle for computer flat knitting machine - Google Patents
Method for processing yarn guide nozzle for computer flat knitting machine Download PDFInfo
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- CN102847944A CN102847944A CN2012101273721A CN201210127372A CN102847944A CN 102847944 A CN102847944 A CN 102847944A CN 2012101273721 A CN2012101273721 A CN 2012101273721A CN 201210127372 A CN201210127372 A CN 201210127372A CN 102847944 A CN102847944 A CN 102847944A
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Abstract
The invention discloses a method for processing a yarn guide nozzle for a computer flat knitting machine and belongs to the technical field of metal powder injection molding. The method comprises the following steps of: uniformly mixing 90 to 94 parts by weight of metal powder and 6 to 10 parts by weight of binder in a mixing device to obtain a raw material for injection; introducing the raw material for injection into an injection molding machine with a yarn guide nozzle die and carrying out injection molding at a controlled injection molding temperature to obtain a yarn guide nozzle blank; immersing the yarn guide nozzle blank in dichloromethane, controlling immersing temperature and immersing time, introducing the yarn guide nozzle blank into a degreasing furnace to remove the binder to obtain a degreased blank body, wherein the degreasing temperature is controlled at a specific temperature; sintering the degreased blank body in a sintering furnace to obtain a yarn guide nozzle to be subjected to thermal treatment, wherein sintering temperature and sintering time are controlled to be specific values respectively; and performing thermal treatment on the yarn guide nozzle at a specific thermal treatment temperature to obtain the yarn guide nozzle with the hardness HRC being 60-62. The method has the advantages that the processing efficiency can be improved, and a requirement on the industrial batch production can be met; phenomena of cracks and/or looseness can be avoided; and manufacturing cost is low.
Description
Technical field
The invention belongs to the Metal Injection Molding field, be specifically related to the processing method of the yarn mouth that a kind of computer plain flat knitter uses
Background technology
Above mentioned yarn mouth (also claims Yarn-guiding mouth, as follows) concept be that the professional in Knitting Machinery field knows, although its macrostructure there are differences, but function all is the yarn feeding knitting mechanisms with braiding usefulness, can be by being understood being not limited to following that exemplify and disclosed Chinese patent literature to this: publication number CN101457440A(Yarn nozzle of knitting horizontal machine), the CN2330673Y(Yarn-guiding mouth), CN2858685Y(Yarn-guiding mouth), CN201250331Y(two-faced machine yarn mouth), CN201250330Y(knitting machine yarn mouth), three-hole nozzle on the CN2554201Y(flat machine) and the CN201024278Y(computer flat machine yarn nozzle), etc.
Processing method to the yarn mouth in the prior art mainly contains following two kinds: the one, by the numerical control machine Cutter Body Processing with Machining Center; The 2nd, accurate casting.Because the shape of yarn mouth is comparatively special, and exists the plane that can Gong clamp hardly, therefore in by the numerical control machining center process, need after multi-pass clamps, just to be accomplished processing, but multi-pass clamps the uniformity that can affect product.Accurate casting is to introduce mold cavity behind the metal molten again, this method has the strong point good to shape of product adaptability, namely be not subjected to the restriction of shape of product, but very soon cooling in flowing to the process of mold cavity behind the metal molten, especially be difficult to flow smoothly at the thinner position metal liquid of wall thickness, thereby the defective with crackle and so on very easily occurs not filling with.In addition, no matter be that digital control processing or accurate casting exist all that efficient is low, cost is high and lose relatively cheap drawback.
In published China and foreign countries patent and non-patent literature, be showed no the technology enlightenment of all manufacturing yarn mouths except above two kinds of processing methods, the applicant has done actively and good try for this reason, and technical scheme described below produces under this background
Summary of the invention
Task of the present invention is to provide a kind of and helps to significantly improve working (machining) efficiency and use and satisfy industrial amplification production and require, be conducive to Crack prevention and/or loose phenomenon and use and ensure desirable fine and close effect and be of value to the processing method that embodies economy and use the yarn mouth that the computer plain flat knitter that reduces cost uses.
Task of the present invention is finished like this, and the processing method of the yarn mouth that a kind of computer plain flat knitter is used may further comprise the steps:
A) get the raw materials ready, by weight metal dust 90-94 part and binding agent 6-10 part are dropped into mixing in the mixing device, obtain the injection raw material;
B) the injection (mo(u)lding) machine injection moulding of being furnished with yarn mouth mould is introduced the injection raw material in injection moulding, and the control injecting forming temperature, obtains yarn mouth parison;
C) degreasing is soaked yarn mouth parison first in carrene, and control soaking temperature and the time, then introduce in the debinding furnace, and removing binding agent, and the control skimming temp, obtain degreasing blank;
D) sintering changes degreasing blank in sintering furnace sintering, and control sintering temperature and sintering time, obtains yarn mouth to be heated;
E) yarn mouth to be heated is heat-treated in heat treatment, and the control heat treatment temperature, and obtaining hardness HRC is the yarn mouth of 60-62.
In a specific embodiment of the present invention, steps A) metal dust described in is Cr12MoV or 440C powder.
In another specific embodiment of the present invention, steps A) binding agent described in is organic binder bond.
In another specific embodiment of the present invention, described organic binder bond is made of following raw material by weight: paraffin 55-65 part, polyethylene 30-40 part and stearic acid 4-6 part.
In another specific embodiment of the present invention, step B) the control injecting forming temperature described in is that injecting forming temperature is controlled to be 130-160 ℃.
Also have in the specific embodiment step C of the present invention) described in control soaking temperature and soak time be that soaking temperature is controlled to be 30-50 ℃, soak time is controlled to be 120-300min; Described control skimming temp comprises the skimming temp of controlling the phase I and the skimming temp of controlling second stage.
More of the present invention and in specific embodiment, described control phase I skimming temp is that temperature is controlled to be 300-400 ℃, and insulation 55-65min and introduce simultaneously protective gas; The skimming temp of described control second stage is that temperature is controlled to be 400-500 ℃, and insulation 110-130min.
In of the present invention and then specific embodiment, described protective gas is hydrogen, nitrogen or argon gas, and the flow of hydrogen, nitrogen or argon gas is 0.5-1.0L/min.
Of the present invention again more and in specific embodiment, step D) the control sintering temperature described in is that sintering temperature is controlled to be 1230-1250 ℃; Described control sintering time is that sintering time is controlled to be 85-95min.
In again of the present invention and then specific embodiment, step e) the control heat treatment temperature described in is that heat treatment temperature is controlled to be 1000-1100 ℃.
Technical scheme provided by the invention can significantly improve the working (machining) efficiency to the yarn mouth with respect to one of advantage of prior art institute tool, is satisfied the industrialized mass production requirement; Two owing to having desirable density, thereby can stop crackle and/or loose situation; Three, low cost of manufacture and can ensure the relatively cheap of yarn mouth product.
Description of drawings
Fig. 1 is the schematic diagram of the yarn mouth that obtains of the inventive method.
The specific embodiment
Yarn mouth body 1 shown in Fig. 1 only is a kind of version that the applicant puts to the proof, and therefore can't limit the present invention program by this, because utilize the present invention program can process the changeable yarn mouth of macrostructure.
Embodiment 1:
A) get the raw materials ready, by weight with mixing in 90 parts in Cr12MoV powder and 10 parts of input batch mixers of organic binder bond, obtain the injection raw material, wherein: organic binder bond is to be made of following raw material by weight, 5 parts of 60 parts in paraffin, 35 parts of polyethylene and stearic acid;
B) injection moulding will be by steps A) the injection raw material that obtains introduces the injection (mo(u)lding) machine injection moulding of the yarn mouth mould of the yarn mouth body 1 of being furnished with structure shown in Figure 1, and injecting forming temperature is controlled to be 130 ℃, obtains yarn mouth parison;
C) degreasing, at first will be by step B) the yarn mouth parison that obtains introduces in the container that fills carrene and soaks, soaking temperature is 50 ℃, soak time is 120min, to remove the part paraffin in the aforesaid organic binder bond, then change in (introducing) debinding furnace to remove the residual paraffin in the organic binder bond, polyethylene and stearic acid, skimming temp is divided into two stage controls, the temperature of phase I with debinding furnace rises to 300 ℃, and insulation 65min, introduce hydrogen or argon gas in the debinding furnace as protective gas in this phase I, the flow of hydrogen or argon gas is 0.5L/min, thereby the residual paraffin as the first component in the organic binder bond is removed fully, second stage is behind insulation 65min temperature to be risen to 500 ℃, and insulation 110min, essentially identical the second component of fusing point each other that removes in the organic binder bond in this second stage is that polyethylene and the 3rd component are stearic acid, obtains degreasing blank;
D) sintering will be by step C) degreasing blank that obtains introduces sintering in the sintering furnace, and sintering temperature is 1230 ℃, and sintering time is 95min, obtains yarn mouth to be heated;
E) heat treatment is to by step D) the yarn mouth to be heated that obtains heat-treats, and heat treatment temperature is 1020 ℃, and the time is 65min, and obtaining by shown in Figure 1 and hardness is that the yarn mouth of HRC60-62 is yarn mouth body 1.
Embodiment 2:
A) get the raw materials ready, by weight with mixing in 94 parts of 440C high-carbon powder of stainless steel and 6 parts of input batch mixers of organic binder bond, obtain the injection raw material, wherein: organic binder bond is paraffin, polyethylene and stearic mixture, and its parts by weight are: 6 parts of 55 parts of paraffin parts, 39 parts of polyethylene and stearic acid;
B) injection moulding will be by steps A) the injection raw material that obtains introduces the injection (mo(u)lding) machine injection moulding of the yarn mouth mould of the yarn mouth body 1 of being furnished with structure shown in Figure 1, and injecting forming temperature is controlled to be 160 ℃, obtains yarn mouth parison;
C) degreasing, first will be by step B) the yarn mouth parison that obtains introduces in the container that fills carrene and soaks, soaking temperature is 30 ℃, soak time is 300min, to remove the part paraffin as the first component of organic binder bond, then change in the debinding furnace to remove as the polyethylene of the second component of organic binder bond with as the stearic acid of the 3rd component over to, skimming temp is divided into two stage controls, the temperature of phase I with debinding furnace rises to 400 ℃, and insulation 55min, and introduce hydrogen or argon gas in the debinding furnace as protective gas in this phase I, the flow of hydrogen or argon gas is 1.0L/min, thereby the residual paraffin as the first component in the organic binder bond is removed fully, second stage is behind insulation 55min temperature to be risen to 500 ℃, and insulation 130min, essentially identical the second component of fusing point each other that removes in the organic binder bond in this second stage is that polyethylene and the 3rd component are stearic acid, obtains degreasing blank;
D) sintering will be by step C) degreasing blank that obtains introduces sintering in the sintering furnace, and sintering temperature is 1250 ℃, and sintering time is 85min, obtains yarn mouth to be heated;
E) heat treatment is to by step D) the yarn mouth to be heated that obtains heat-treats, and heat treatment temperature is 1100 ℃, and the time is 60min, and obtaining by hardness shown in Figure 1 is that the yarn mouth of HRC60-62 is yarn mouth body 1.
Embodiment 3:
Only with steps A) in the parts by weight of Cr12MoV powder change 92 parts into, and change the parts by weight of organic binder bond into 8 parts, change respectively paraffin, polyethylene and stearic parts by weight into 65 parts, 31 parts and 4 parts; With step B) in injecting forming temperature change 145 ℃ into; With step C) in soaking temperature change 40 ℃ into, soak time changes 240min into, phase I changes the debinding furnace temperature into and is warming up to 350 ℃, temperature retention time changes 60min into, second stage is warming up to 450 ℃ with the debinding furnace temperature, temperature retention time changes 120min into, and changes the flow of hydrogen or argon gas into 0.75L/min; With step D) in sintering temperature and time change respectively 1240 ℃ and 90min into; With step e) in heat treatment temperature change 1050 ℃ into, the time is 62min.All the other are all with the description to embodiment 1
Claims (10)
1.
The processing method of the yarn mouth that a kind of computer plain flat knitter is used is characterized in that may further comprise the steps:
A) get the raw materials ready, by weight metal dust 90-94 part and binding agent 6-10 part are dropped into mixing in the mixing device, obtain the injection raw material;
B) the injection (mo(u)lding) machine injection moulding of being furnished with yarn mouth mould is introduced the injection raw material in injection moulding, and the control injecting forming temperature, obtains yarn mouth parison;
C) degreasing is soaked yarn mouth parison first in carrene, and control soaking temperature and the time, then introduce in the debinding furnace, and removing binding agent, and the control skimming temp, obtain degreasing blank;
D) sintering changes degreasing blank in sintering furnace sintering, and control sintering temperature and sintering time, obtains yarn mouth to be heated;
E) yarn mouth to be heated is heat-treated in heat treatment, and the control heat treatment temperature, and obtaining hardness HRC is the yarn mouth of 60-62.
2.
The processing method of the yarn mouth that computer plain flat knitter according to claim 1 is used is characterized in that steps A) described in metal dust be Cr12MoV or 440C powder.
3.
The processing method of the yarn mouth that computer plain flat knitter according to claim 1 is used is characterized in that steps A) described in binding agent be organic binder bond.
4.
The processing method of the yarn mouth that computer plain flat knitter according to claim 3 is used is characterized in that described organic binder bond is made of following raw material by weight: paraffin 55-65 part, polyethylene 30-40 part and stearic acid 4-6 part.
5.
The processing method of the yarn mouth that computer plain flat knitter according to claim 1 is used is characterized in that step B) described in the control injecting forming temperature be that injecting forming temperature is controlled to be 130-160 ℃.
6.
The processing method of the yarn mouth that computer plain flat knitter according to claim 1 is used is characterized in that step C) described in control soaking temperature and soak time be that soaking temperature is controlled to be 30-50 ℃, soak time is controlled to be 120-300min; Described control skimming temp comprises the skimming temp of controlling the phase I and the skimming temp of controlling second stage.
7.
The processing method of the yarn mouth that computer plain flat knitter according to claim 6 is used is characterized in that described control phase I skimming temp is that temperature is controlled to be 300-400 ℃, and is incubated 55-65min and introduces simultaneously protective gas; The skimming temp of described control second stage is that temperature is controlled to be 400-500 ℃, and insulation 110-130min.
8.
The processing method of the yarn mouth that computer plain flat knitter according to claim 7 is used is characterized in that described protective gas is hydrogen, nitrogen or argon gas, and the flow of hydrogen, nitrogen or argon gas is 0.5-1.0L/min.
9.
The processing method of the yarn mouth that computer plain flat knitter according to claim 1 is used is characterized in that step D) described in the control sintering temperature be that sintering temperature is controlled to be 1230-1250 ℃; Described control sintering time is that sintering time is controlled to be 85-95min.
10.
The processing method of the yarn mouth that computer plain flat knitter according to claim 1 is used is characterized in that step e) described in the control heat treatment temperature be that heat treatment temperature is controlled to be 1000-1100 ℃
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101273721A CN102847944A (en) | 2012-04-27 | 2012-04-27 | Method for processing yarn guide nozzle for computer flat knitting machine |
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| CN2012101273721A CN102847944A (en) | 2012-04-27 | 2012-04-27 | Method for processing yarn guide nozzle for computer flat knitting machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043835A (en) * | 2014-06-03 | 2014-09-17 | 宝得粉末注射成形（常熟）有限公司 | Processing method for presser foot control cam for computerized flat knitting machines |
| CN104785785A (en) * | 2015-04-01 | 2015-07-22 | 宝得粉末注射成形（常熟）有限公司 | Machining method for swing cam for car steering control system |
| CN104841940A (en) * | 2015-04-01 | 2015-08-19 | 宝得粉末注射成形（常熟）有限公司 | Method for manufacturing small turbine engine blade |
| CN110566585A (en) * | 2018-06-06 | 2019-12-13 | 斯凯孚公司 | Rolling bearing ring by metal injection molding process |
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| JPH01321262A (en) * | 1988-06-21 | 1989-12-27 | Kyocera Corp | Thread guide |
| CN1178149A (en) * | 1996-09-27 | 1998-04-08 | 财团法人工业技术研究院 | Manufacture of precise cop latch |
| TW467980B (en) * | 1998-11-13 | 2001-12-11 | Keumyong Machinery Co Ltd | Yarn guiding device for knitting machine and method for manufacturing yarn guiding member forming the device |
| CN1914362A (en) * | 2004-02-04 | 2007-02-14 | 索若两合股份有限公司 | Fiber guide channel for an open-end spinning device and method for producing a fiber guide channel |
| CN101353768A (en) * | 2008-09-26 | 2009-01-28 | 北京科技大学 | Nitrogen-containing nickel-free stainless steel and metallurgy forming process for powder thereof |
| CN101391303A (en) * | 2007-09-18 | 2009-03-25 | 比亚迪股份有限公司 | Handset shaft manufacture method |
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2012
- 2012-04-27 CN CN2012101273721A patent/CN102847944A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01321262A (en) * | 1988-06-21 | 1989-12-27 | Kyocera Corp | Thread guide |
| CN1178149A (en) * | 1996-09-27 | 1998-04-08 | 财团法人工业技术研究院 | Manufacture of precise cop latch |
| TW467980B (en) * | 1998-11-13 | 2001-12-11 | Keumyong Machinery Co Ltd | Yarn guiding device for knitting machine and method for manufacturing yarn guiding member forming the device |
| CN1914362A (en) * | 2004-02-04 | 2007-02-14 | 索若两合股份有限公司 | Fiber guide channel for an open-end spinning device and method for producing a fiber guide channel |
| CN101391303A (en) * | 2007-09-18 | 2009-03-25 | 比亚迪股份有限公司 | Handset shaft manufacture method |
| CN101353768A (en) * | 2008-09-26 | 2009-01-28 | 北京科技大学 | Nitrogen-containing nickel-free stainless steel and metallurgy forming process for powder thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043835A (en) * | 2014-06-03 | 2014-09-17 | 宝得粉末注射成形（常熟）有限公司 | Processing method for presser foot control cam for computerized flat knitting machines |
| CN104785785A (en) * | 2015-04-01 | 2015-07-22 | 宝得粉末注射成形（常熟）有限公司 | Machining method for swing cam for car steering control system |
| CN104841940A (en) * | 2015-04-01 | 2015-08-19 | 宝得粉末注射成形（常熟）有限公司 | Method for manufacturing small turbine engine blade |
| CN110566585A (en) * | 2018-06-06 | 2019-12-13 | 斯凯孚公司 | Rolling bearing ring by metal injection molding process |
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Application publication date: 20130102 |