CN1178149A - Manufacture of precise cop latch - Google Patents
Manufacture of precise cop latch Download PDFInfo
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- CN1178149A CN1178149A CN 96109875 CN96109875A CN1178149A CN 1178149 A CN1178149 A CN 1178149A CN 96109875 CN96109875 CN 96109875 CN 96109875 A CN96109875 A CN 96109875A CN 1178149 A CN1178149 A CN 1178149A
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- ejection formation
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- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 6
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 5
- YPFNIPKMNMDDDB-UHFFFAOYSA-K 2-[2-[bis(carboxylatomethyl)amino]ethyl-(2-hydroxyethyl)amino]acetate;iron(3+) Chemical compound [Fe+3].OCCN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O YPFNIPKMNMDDDB-UHFFFAOYSA-K 0.000 claims 2
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- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
A method for manufacturing precise central shuttle of sewing machine is a metallic powder ejection procedure, which includes such technological teps as mixing metallic powder with binder, ejection shaping with metal mould and ejection shaping machine to obtain raw blank, supporting it by supporter designed specially, defatting for removing binder, sintering to obtain silver blank, trimming, welding central axle to it, heat treatment and fine grinding. Its advantages are less steps and apparatuses, saing labour and high quality of product.
Description
The present invention relates to a kind of in the method for making of shuttle, refer to shuttle method for making in the precision of sewing machine special use especially.
Sewing machine industry is one of important people's livelihood industry.And sewing machine is a kind of machinery of precision, is assembled by the part of many precisions.The quality of these parts to the performance of sewing machine and the quality of clothing sewing, has decisive influence.Among these precision parts of sewing machine, again with the requirement of the complex-shaped degree of middle shuttle (Shuttle Hook) and precision the highest (see also Fig. 1 among shuttle finished product outward appearance).Therefore, middle shuttle becomes the most representative key part in the sewing machine.
Shuttle method for making in the existing sewing machine can generally be divided into following three classes:
First kind method: the forging/turning of tradition/milling is a shuttle processing procedure among the master: use round steel bar as material, to this round steel bar cut-out, forging, turning, milling, boring ... wait the above machining program in 75 roads, the making of shuttle in finishing, this is to make minimum, the least economic method of efficient at present.
Second class methods: punch forming, hard solder are combined as main middle shuttle processing procedure: mainly be to be material with the plate, through punching press, moulding, welding ... shuttle during supervisor is made.Preceding, the Hou housing of shuttle in becoming earlier with punch process, the tying teat on the right Hou mat housing is done system with recess and is closed the location, and making preceding, two housings of Hou is to close Hou, and hard solder is integral again.This method, can be enhanced productivity for lacking than the procedure of first kind method for making.But because it uses the plate punch forming, the profiled member easy deformation continues in the heat treatment of processing hard solder combination and Hou, and shape, size and the precision of shuttle are difficult for grasping in can causing, and must just can guarantee quality with the program of correction.And required use equipment is many, production process is still loaded down with trivial details, the demand manpower is big, makes this type of method for making also lose competitive advantage gradually.
And the resulting young embryo of the first kind and second class methods, also all will be through finishing, welding central shaft 13, heat treatment, thin portion precise finiss supervisor, shuttle finished product during Hou obtains.So we can say this two class methods, mainly all be the method for making of shuttle moulding in making with machining.
Take a broad view of the method for making of shuttle in this two class, following point is arranged: the first, the processing capacity of manufacturing process is big, and step is many, must use many equipment, and processing procedure management and running are wasted time and energy.The second, because middle fusiformis shape complexity, in processing procedure, be difficult for meeting the requirements of precision, must rely on the continuous correction processing of people's masterpiece Hou, shuttle finished product in finishing, be with, the control of quality is very arduous.Three, office is in existing equipment, manpower and program, and the production capacity of middle shuttle is difficult for improving.
The 3rd class methods: based on the middle shuttle processing procedure of the lost-wax process of hot investment casting.The young embryo of shuttle was the progressive one-body molded autofrettage of middle shuttle during these class methods were made of the lost-wax process of hot investment casting.But in the lost wax casting, carry out repetitiousness to wax pattern and be stained with slurry, and the dry slurry of the universe, and these steps are time-consuming, and quality is wayward.Again, lost-wax process converts the ceramic case mould to wax pattern, the young embryo of shuttle in obtaining with the casting of ceramic case mould again, and the young embryo of middle shuttle must be through the processing of multiple tracks, the size and the precision of shuttle finished product in just can reaching.More because lost-wax process elder generation's processing procedure time in the sky is longer, and quality control is difficult, production is relatively poor.
Be with, because the shortcoming of aforementioned prior art, the present invention's purpose promptly is to provide the method for making of shuttle in a kind of sewing machine, can allow complex-shaped middle shuttle one-shot forming, and, finish the young embryo of middle shuttle of nearly full mold (Near Net Shape), and with quite few procedure through simple processing procedure Hou, can finish the continuous processing of Hou, make finished product.
Another object of the present invention provides the method for making of shuttle in a kind of sewing machine, in making the shaping of shuttle easy, and the goods material is even, does not have the component segregation phenomenon, makes heat treatment deformation little, finished product accuracy is higher.
The present invention's another purpose provides the method for making of shuttle in a kind of sewing machine, makes that the required equipment of shuttle greatly reduces in the making, and simplifies production process, reduces and makes manpower, significantly improves production capacity.
The present invention's a purpose again provides the method for making of shuttle in a kind of sewing machine, make make among shuttle, quality is excellent more.
In order to achieve the above object, the method for making of shuttle in the sewing machine provided by the present invention, be to use the metal dust ejection formation to make, use metal dust and the bond allotment ejection formation prescription of particle diameter at 5-20 μ m (micron), with this ejection formation prescription that makes, in metal die, ejection formation on Jet forming machine, obtain the living embryo of middle shuttle, should give birth to embryo by middle shuttle again, support to be provided with the suitable extraction frame that is somebody's turn to do the living embryo arc of middle shuttle limit in arc limit, carry out the degreasing program, the bond of giving birth in the embryo is removed, and give birth to the shape of embryo by shuttle in the maintenance of extraction frame, size and precision, and Hou, the middle shuttle of this degreasing Hou is given birth to embryo carry out sintering, with metal powder sintered moulding, shuttle silver embryo in obtaining is again the silver-colored embryo that makes, (make profile through finishing, the trace of burr is revised), the central shaft of burn-oning, heat treatment (makes the surface sclerosis, gain in strength) and the precise finiss of the thin portion size of Hou finished product (make), and make middle shuttle, reach the foregoing invention purpose.
Below, the present invention's characteristics will be described in detail in detail with embodiment, and other effect:
Fig. 1 is a shuttle finished product appearing diagram in the sewing machine;
Fig. 2 is the making flow chart of the embodiment of the invention;
Fig. 3 extracts an embodiment schematic diagram of frame for the present invention;
Fig. 4 is the middle shuttle additional support runners organigram of one embodiment of the invention;
Fig. 5 is the top view that the shuttle idiosome uses ceramic gasket and membrane support structure in one embodiment of the invention;
Fig. 6 is that the shuttle idiosome uses powder supporter organigram in one embodiment of the invention:
Table 1 is the comparison of the present invention and traditional method for making.
Just as noted earlier, the method for making of existing middle shuttle, how based on machining, an other class is to use lost wax casting, and the present invention then uses metal powder jet forming method, and (MetalInjection Molding MIM) makes shuttle in the integrated sewing machine.
And metal powder ejection formation is the conformability technology in conjunction with plastic rubber ejaculate molding and powder metallurgy.U.S.'s what promptly began to have industrial production in 1973.Therefore, for being familiar with this operator, the control of metal powder ejection formation manufacturing conditions, belong to the what prior art, not at this detailed description, this paper is only in the metal dust ejection formation, about the present invention makes the relevant processing procedure and the equipment of shuttle in the sewing machine, do the explanation of summary.Embodiment one:
See also Fig. 2, it makes a making flow implementation example of shuttle in the sewing machine for the present invention.
The shuttle method for making is to be deployed into the ejection formation prescription (Molding Compound) with thermal fluidity with metal dust and bond (binder) in of the present invention, fill a prescription in the precision metallic mould with this again, ejection formation on Jet forming machine, the living embryo (GreenCompacts) of shuttle in making, shuttle is given birth to the supporter supports of embryo with particular design in will being somebody's turn to do again, carry out degreasing and sintering program, the bond of giving birth in the embryo is removed Hou, shuttle silver embryo in sintering into, again the silver-colored embryo that makes, through finishing, the central shaft of burn-oning, the precise finiss of heat treatment and thin portion makes middle shuttle finished product.
Below be that the implementation content of present embodiment is done more detailed the introduction, if cooperate above-mentioned flow process (outline) to read it, when more cheer and bright.
Aforesaid metal dust raw material, general powder diameter is between 5～20 μ m (micron), so long as sintered powder all can be used as raw material.In the present embodiment, we to use average grain diameter be that 5～6 microns iron powder is as the metal dust in the moulding prescription.The homogeneous mixture that bond is then formed for polypropylene, polystyrene, wax (present embodiment use paraffin) and hard fatty acids, wherein polypropylene and the polystyrene content in bond is 30～80% (weight), is preferably 55% (weight).Wherein, polystyrene can replace with polymethyl methacrylate, and wax can be used paraffin, beeswax or micro-crystallization wax, but its melt index has change slightly.In whole moulding prescription, the weight of iron powder is 88～93%, is preferably 90%.
Iron powder that utilizes this weight ratio 88～93% and bond by polypropylene, polystyrene, cured and weight ratio that hard fatty acids is formed 7～12%, in the closed cell of heating, be kneaded into the ejection formation prescription, the temperature of heating is 180 degree Celsius, 50 minutes time.Resulting moulding prescription, melt index values are 120～320g/10min, and aforementioned preferred values is 135g/10min (6.2kg/160 a ℃).
And when keeping moulding charging stable, and prevent from hopper, to have arch formation to produce, prescription makes graininess usually and uses.Utilize the ejection formation prescription, carry out moulding with plastic rubber ejection shaping apparatus, heating makes the prescription fusion have flowability, pushes through nozzle with screw rod again, injects moulding in the die cavity, and cooling Hou is taken out, and obtains giving birth to embryo.
Give birth to embryo and will pass through degreasing and sintering, supply further to use with the silver-colored embryo (Silver Parts) that becomes middle shuttle.Wherein so-called " degreasing " is meant the bond of giving birth in the embryo is removed.Because of the effect of bond, give the metal dust flowability at what, and guarantee to give birth to the shape of embryo.In case moulding Hou, the interim purpose of bond is finished, needs with it removal, so that carry out sintering.The method of general degreasing has two kinds: the first, and use solvent with the bond stripping, this method is called " extraction "; The second, heating removes bond, and this is called " hot degreasing ".In the processing procedure of metal ejection formation,, give birth to embryo and have the situation generation of breaking if the bond of degreasing program is removed too soon.(and the uniformity that bond distributes in prescription also can influence the uniformity of shrinking when powder sintered.Therefore, the composition of bond and prescription are important technologies of metal ejection formation.)
In the present embodiment, the middle shuttle that we will make is given birth to embryo, uses the normal heptane extraction, to remove the wax in the living embryo.In shuttle give birth to embryo when in normal heptane, extracting, its shape, size and precision can be by extraction framves provided by the present invention shown in Figure 3, and must keep.On this extraction frame 20, be provided with the arcuation orifice plate 21 on arc limit 22, make the radian of this orifice plate 21, be fit to the arc limit 11 of middle shuttle 10 (Fig. 1).Based on the consideration of volume production, extraction frame 20 more can be provided with a plurality of orifice plates 21, makes and respectively organizes between the orifice plate, separates with dividing plate 23, and a plurality of holes (not showing on the figure) also can be set on the dividing plate 23, helps extraction.
The middle shuttle that aforementioned system is appropriate is given birth to embryo, sends in degreasing/sintering furnace, (also can be in vacuum 10 under nitrogen atmosphere
-1～10
4Under the Torr environment) carry out hot degreasing and (make the not most bond of extraction, can further be removed) and sintering, sintering temperature is between 1200～1300 ℃, and the time is one to three hour, acquisition has the middle shuttle silver embryo of metallic luster outward appearance, and the density of this silver embryo is 7.49g/cm
3About.
Idiosome is in hot degreasing and sintering process, and shape, size and precision more can be avoided changing by the support of particular design on the idiosome.See also Fig. 4, it is that middle shuttle idiosome 10 ' is gone up one of design support runners 31 embodiment, because the support of this runners 31, shuttle idiosome 10 ' in can making can not produce distortion in manufacturing process.Certainly, for being familiar with the personage of this technology,, and reach identical effect when the size that can revise runners 31, shape and position.Only, this part belongs to apparent and easy to know, does not promptly give unnecessary details at this.
In addition, we also can use support structure as shown in Figure 5 to replace, and middle shuttle idiosome 10 ' is placed on the ceramic gasket 41.And between a plurality of middle shuttle idiosomes 10 ', then separate, fix with ceramic separator 42, shape, size and the precision of shuttle idiosome 10 ' in so just can keeping.
The silver-colored embryo that obtains has the character of metal material, and this can make the silver-colored embryo of making by the selecting for use of metal dust, the character of tool iron or iron-nickel alloy (is ferroalloy at present embodiment), and on the physical property, similar forging product.Shape, size and the precision of middle shuttle silver embryo are all very near finished product, as long as (use grinding, cutting through finishing, modification with profile, burr work trace), the central shaft of burn-oning, heat treatment (so that surface sclerosis, gain in strength) and the precise finiss of the thin portion size of Hou finished product (make), commercial high-quality middle shuttle product just can be obtained.Embodiment two:
Same Fig. 2 of making flow process of present embodiment.
In the present embodiment, our nickel powder (average grain diameter is 4～5 microns) of using 2% weight and the iron powder (average grain diameter is 5～6 microns) of 98% weight are as the metal dust in the moulding prescription.The homogeneous mixture that bond is then formed for polypropylene, polystyrene (or polymethyl methacrylate), paraffin and hard fatty acids, wherein polypropylene and the polystyrene content in bond is 30～80% (weight), is preferably 55% (weight).In whole moulding prescription, the weight of metal dust is 88～93%, is preferably 90%.
Utilize this metal dust and combine profit, be kneaded into the ejection formation prescription in the closed cell of heating, the temperature of heating is 180 degree Celsius, 50 minutes time.Resulting moulding prescription, melt index values are 120～320g/10min, and aforementioned preferred values is 135g/10min (6.2kg/160 a ℃).
Utilize the ejection formation prescription, carry out moulding with plastic rubber ejection shaping apparatus, heating makes the prescription fusion have flowability, pushes into nozzle with screw rod again, injects moulding in the die cavity, and cooling Hou is taken out, and obtains giving birth to embryo.
Next carry out degreasing and sintering program, make living embryo become silver-colored embryo.In the present embodiment, we give birth to embryo by the middle shuttle that aforementioned system is appropriate, send in degreasing/sintering furnace, in vacuum 10
-1～10
-4Carry out hot degreasing and sintering under the Torr environment, sintering temperature is between 1200～1300 ℃, and the time is one to three hour, obtains to have the middle shuttle silver embryo of metallic luster outward appearance, and the density of this silver embryo is 7.52g/cm
3About.
Idiosome is in hot degreasing and sintering process, and shape, size and precision also can be avoided by the support structure of aforementioned particular design changing, as Fig. 4, support structure shown in Figure 5.
In addition, also can use support structure as shown in Figure 6 to replace.See also Fig. 6, the non-rigid supporter 52 that we use alumina powder to pile up, shuttle idiosome 10 ' in supporting, middle shuttle idiosome 10 ' is then put on the what ceramic gasket 51, and shuttle idiosome 10 ' keeps shape, size and precision in similarly making.
The silver-colored embryo that obtains has the character of iron-nickel alloy, again through the precise finiss of finishing, the central shaft 13 of burn-oning, heat treatment and thin portion, just can obtain commercial high-quality middle shuttle product.
We compare the present invention with shuttle method for making in traditional sewing machine, can obtain table 1.
Table 1
By above embodiment and table 1 as can be known, the present invention makes complex-shaped middle shuttle one-shot forming with metal die, makes forming shape, size and precision all near shuttle goods among the commercialization requirement through degreasing and sintering again, be able to minimum procedure, the manufacturing of shuttle in finishing, procedure is various on the solution conventional process, and processing capacity is big, product quality is wayward, consume a large amount of manpowers, production capacity promotes the disappearance that is difficult for, and has efficient.And the present invention utilizes shuttle in the making of powder metallurgic method sintering, so material is even, does not have the material segregation situation of microcast process, thereby deflection is little during heat treatment, shuttle finished product among obtained, on outward appearance, shape, size and precision, the finished product that all excellent what conventional process is made.
| Middle shuttle processing procedure | The young embryo processing procedure of middle shuttle | The continuous processing of Hou | Relatively comprehensive | ||||||||||
| The processing procedure explanation | Stock utilization | Yields | Precision | Young embryo is heavy | Process pre-allowance | Processing capacity | The processing passage | Finished weight | The procedure number | Production | Product quality | ||
| The metal dust jet forming method | Prescription modulation → ejection formation → degreasing → sintering → middle shuttle silver embryo (young embryo).Illustrate: one-body molded | 100% | 96% | High | 14g | Little | 1.4g | 25 | 12.6g | Minimum (30) | Best | Excellent | |
| Conventional process | Punch forming, welding combination processing procedure | Progressive die punching press (seven roads) → combination → argon welding → brazing → young embryo.Illustrate: punching press, soldering group synthesis type | 50% | 92% | In | 16g | In | 2.5g | 50 | 13.5g | Many (55) | Good | Good |
| Forging, turning, milling processing procedure | Half block body → inner many Yus the material of shuttle → young embryo in hollowing out is cut → cut off in round stock → forging → turning → company.Illustrate: forging/car/mill/, progressively processing | 10% | 80% | Low | 30g | Greatly | 15g | 75 | 15g | (82) at most | Difference | Difference | |
| The hot investment casting processing procedure | That plastic cement wax-pattern ejection formation → zircon sand is stained with slurry → (←) universe is dry → and ceramic case mould → casting → sand removal and finishing → young embryo dewax → sinter into.Illustrate: one-body molded | 85% | 85% | In | 20g | In | 4.5g | 35 | 15.5g | Few (42) | Good | Good | |
Be with, the present invention with minimum procedure, manufacturing equipment and manpower demand, and have excellent production, and must produce high-quality middle shuttle, economic worth is high, what is promoted the inter-industry competition ability to be had greatly and benefits.
Claims (62)
1. the method for making of shuttle in the sewing machine, it is characterized in that it may further comprise the steps: (1) uses particle diameter to allocate the ejection formation prescription at 5～20 microns metal dust with bond; (2) with this ejection formation prescription in metal die, ejection formation on Jet forming machine and shuttle life embryo obtaining in; (3) should give birth to embryo by middle shuttle, support, carry out the degreasing program, the bond in the living embryo was removed to be provided with the suitable extraction frame that is somebody's turn to do the living embryo arc of middle shuttle limit in arc limit; (4) the middle shuttle of this degreasing Hou is given birth to embryo and carry out sintering, shuttle silver embryo in obtaining; (5) will make silver-colored embryo, the precise finiss through finishing, the central shaft of burn-oning, heat treatment and thin portion obtains middle shuttle.
2. method for making as claimed in claim 1 is characterized in that metal dust in this moulding prescription is 5～6 microns a iron powder.
3. method for making as claimed in claim 1 is characterized in that this bond is the mixture that polypropylene, polystyrene, wax and hard fatty acids are formed.
4. method for making as claimed in claim 1 is characterized in that polypropylene and the content of polystyrene in bond in this bond is 30～80% percentage by weights.
5. method for making as claimed in claim 4 is characterized in that polypropylene and the content of polystyrene in bond in this bond is 55% percentage by weight.
6. method for making as claimed in claim 1 is characterized in that this bond is the mixture that polypropylene, polymethyl methacrylate, paraffin and hard fatty acids are formed.
7. method for making as claimed in claim 3 is characterized in that the wax in this bond, is to select the group that is formed from paraffin, beeswax and micro-crystallization wax.
8. method for making as claimed in claim 2, the weight that it is characterized in that this iron powder is 88～93%.
9. method for making as claimed in claim 8, the weight that it is characterized in that this iron powder is 90%.
10. method for making as claimed in claim 1, it is characterized in that this ejection formation prescription, be iron powder, and, made in 50 minutes with 180 degree heating Celsius by the bond of polypropylene, polystyrene, wax and weight that hard fatty acids is formed 7～12% with heavy 88～93%.
11. method for making as claimed in claim 10, the melt index values that it is characterized in that this ejection formation prescription is 120～320g/10min.
12. method for making as claimed in claim 11, the melt index values that it is characterized in that this ejection formation prescription are 135g/10min (6.2kg/160 ℃).
13. method for making as claimed in claim 3 is characterized in that this degreasing program is to use the normal heptane extraction, removes the wax in the living embryo of shuttle in this.
14. method for making as claimed in claim 1 is characterized in that this extraction frame is provided with the arcuation orifice plate on arc limit, makes the radian of this arcuation orifice plate, is fit to the arc limit that shuttle in this is given birth to embryo.
15. method for making as claimed in claim 14 is characterized in that the arcuation orifice plate on this extraction frame is a plurality of, and also is provided with dividing plate on this extraction frame, in order to separate these arcuation orifice plates.
16. method for making as claimed in claim 15 is characterized in that also being provided with a plurality of holes on the dividing plate of this extraction frame, helps extraction.
17. method for making as claimed in claim 1 is characterized in that this sintering program is under nitrogen atmosphere, 1200～1300 ℃ of temperature, one to three hour heat time heating time, shuttle silver embryo during sintering obtains.
18. method for making as claimed in claim 1 is characterized in that this sintering program is in vacuum 10
-1～10
-4Under the Torr environment, 1200～1300 ℃ of sintering temperatures, the time is one to three hour.
19. method for making as claimed in claim 1 is characterized in that living embryo of shuttle is provided with the support runners in this.
20. method for making as claimed in claim 19 is characterized in that this support runners is provided in a side of on the arc limit of the living embryo of shuttle in this.
21. method for making as claimed in claim 1, it is characterized in that in this sintering program should in shuttle to give birth to embryo be to be positioned on the ceramic gasket, and give birth at middle shuttle and then to be provided with ceramic separator between the embryo and to separate.
22. one kind is used for the degreasing extraction frame that metal ejection formation is made the sewing machine shuttle, it is characterized in that, is provided with the arcuation orifice plate on arc limit on this extraction frame, and makes the radian of this arcuation orifice plate be suitable for the arc limit of shuttle in this.
23. extraction frame as claimed in claim 22 is characterized in that also being provided with dividing plate, in order to separate these arcuation orifice plates.
24. extraction frame as claimed in claim 23 is characterized in that also being provided with on this dividing plate a plurality of holes, helps extraction.
25. the middle shuttle of shuttle is given birth to embryo in the metal ejection formation sewing machine, it is characterized in that, shuttle is given birth to embryo and is had an arc limit in this, and is connected with the support runners on this arc limit.
26. the method for making of shuttle is characterized in that in the sewing machine, it comprises the following steps: that (1) use particle diameter to allocate the ejection formation prescription at 5～20 microns metal powder with bond; (2) fill a prescription in metal die with this ejection formation, use Jet forming machine to penetrate and in obtaining shuttle give birth to embryo; (3) shuttle in this is given birth to embryo and carry out the degreasing program, the bond of giving birth in the embryo is removed; (4) shuttle in this is given birth to embryo and carry out sintering, shuttle silver embryo in making; (5) shuttle silver embryo in this is carried out Hou processing, shuttle finished product in obtaining.
27. method for making as claimed in claim 26 it is characterized in that metal dust in this moulding prescription is 5～6 microns a iron powder, and this iron powder is 88～93% in the weight ratio of this ejection formation prescription.
28. method for making as claimed in claim 26 is characterized in that this bond is the mixture that polypropylene, polystyrene, wax and hard fatty acids are formed.
29. method for making as claimed in claim 28 is characterized in that this polypropylene and the polystyrene weight ratio in this bond is 30～80%.
30. method for making as claimed in claim 29 is characterized in that this polypropylene and the polystyrene weight ratio in this bond is 55%.
31. method for making as claimed in claim 28 is characterized in that this wax is to select the group that is formed from paraffin, beeswax and micro-crystallization wax.
32. method for making as claimed in claim 26, it is characterized in that this ejection formation prescription is the iron powder with weight ratio 88～93%, and, made in 50 minutes with 180 degree heating Celsius by the bond of polypropylene, polystyrene, wax and weight ratio that hard fatty acids is formed 7～12%.
33. method for making as claimed in claim 32, the melt index values that it is characterized in that this ejection formation prescription is 120～320g/10min.
34. method for making as claimed in claim 28 is characterized in that this degreasing program is to use the normal heptane extraction, removes the wax in the living embryo of shuttle in this.
35. method for making as claimed in claim 26 is characterized in that in this degreasing program, also use an extraction frame to carry out degreasing, and this extraction frame is provided with the arcuation orifice plate on arc limit, and the radian of this arcuation orifice plate is the arc limit that is suitable for the living embryo of shuttle in this.
36. method for making as claimed in claim 35 is characterized in that the arcuation orifice plate on this extraction frame is a plurality of, and also is provided with dividing plate on this extraction frame, in order to separate these arcuation orifice plates.
37. method for making as claimed in claim 26 is characterized in that this sintering program is under nitrogen or vacuum atmosphere, 1200～1300 ℃ of temperature, and one to three hour heat time heating time, sintering obtains shuttle silver embryo in this.
38. method for making as claimed in claim 26 is characterized in that living embryo of shuttle is provided with the support runners in this.
39. method for making as claimed in claim 38 is characterized in that this support runners is provided in a side of on the arc limit of the living embryo of shuttle in this.
40. the method for making of shuttle in the sewing machine, it is characterized in that, it comprises the following steps: the iron powder of 5～6 microns of (1) use particle diameters and the bond allotment ejection formation prescription that polypropylene, polystyrene, wax and hard fatty acids are formed, wherein this polypropylene and the polystyrene weight ratio in this bond is 30～80%, and this iron powder is 88～93% in the weight ratio of this ejection formation prescription; (2) fill a prescription in metal die with this ejection formation, utilize the Jet forming machine ejection formation and in obtaining shuttle give birth to embryo; (3) should give birth to embryo by middle shuttle, support, carry out the degreasing program, the bond in the living embryo was removed to be provided with the suitable extraction frame that is somebody's turn to do the living embryo arc of middle shuttle limit in arc limit; (4) the middle shuttle of this degreasing Hou being given birth to embryo carries out sintering and obtains middle shuttle silver embryo; (5) the middle shuttle silver embryo that makes, the precise finiss through finishing, the central shaft of burn-oning, heat treatment and thin portion obtains middle shuttle.
41. method for making as claimed in claim 40 is characterized in that the wax in this bond is to select the group that is formed from paraffin, beeswax and micro-crystallization wax.
42. method for making as claimed in claim 40, it is characterized in that this ejection formation prescription, be iron powder, and, made in 50 minutes with 180 degree heating Celsius by the bond of polypropylene, polystyrene, wax and weight ratio that hard fatty acids is formed 7～12% with weight ratio 88～93%.
43. method for making as claimed in claim 40, the melt index values that it is characterized in that this ejection formation prescription is 120～320g/10min.
44. method for making as claimed in claim 40 is characterized in that this degreasing program is to use the normal heptane extraction, removes the wax in the living embryo of shuttle in this.
45. method for making as claimed in claim 40 is characterized in that this extraction frame is provided with the arcuation orifice plate on arc limit, and the radian of this arcuation orifice plate can be fit to the arc limit of the living embryo of shuttle in this.
46. method for making as claimed in claim 45 is characterized in that the arc frame orifice plate on this extraction frame is a plurality of, and also is provided with dividing plate on this extraction frame, in order to separate these arcuation orifice plates.
47. method for making as claimed in claim 40 is characterized in that this sintering program is under nitrogen atmosphere, 1200～1300 ℃ of temperature heated one to three hour, shuttle silver embryo during sintering obtains.
48. method for making as claimed in claim 40 is characterized in that living embryo of shuttle is provided with the support runners in this.
49. method for making as claimed in claim 48 is characterized in that this support runners is provided in a side of on the arc limit of the living embryo of shuttle in this.
50. method for making of making shuttle in the sewing machine, it is characterized in that, it comprises the following steps: that (1) operating weight is than 2%, nickel powder that particle diameter is 4～5 microns and weight ratio 98%, particle diameter is the metal dust that 5～6 microns iron powder constitutes, with polypropylene, polystyrene, the bond that wax and hard fatty acids are formed, with this metal dust and bond, allotment ejection formation prescription, and wherein this polypropylene and the polystyrene weight ratio in this bond is 30～80%, and this metal dust the weight ratio of this ejection formation prescription be 88～93%:(2) with this ejection formation prescription in metal die, ejection formation on Jet forming machine and shuttle life embryo obtaining in; (3) should in shuttle give birth to embryo, support with the extraction frame that is provided with the arc limit, and make the arc limit of this extraction frame be fit to the arc limit of the living embryo of shuttle in this, to carry out the degreasing program, the bond in the living embryo is removed; (4) the middle shuttle of this degreasing Hou is given birth to embryo and carry out sintering, shuttle silver embryo in obtaining: (5) the middle shuttle silver embryo that makes, the precise finiss through finishing, the central shaft of burn-oning, heat treatment and thin portion obtains middle shuttle.
51. method for making as claimed in claim 50 is characterized in that the wax in this bond, is to select the group that is formed from paraffin, beeswax and micro-crystallization wax.
52. method for making as claimed in claim 50 is characterized in that this ejection formation prescription, is this metal dust and bond were made with 180 degree heating Celsius in 50 minutes.
53. method for making as claimed in claim 50, the melt index values that it is characterized in that this ejection formation prescription is 120～320g/10min.
54. method for making as claimed in claim 50 is characterized in that this degreasing program, is to use the extraction of normal heptane to remove the wax in the living embryo of shuttle in this.
55. method for making as claimed in claim 50 is characterized in that this extraction frame is provided with the arcuation orifice plate on arc limit, and the radian of this arcuation orifice plate is the arc limit that is fit to the living embryo of shuttle in this.
56. method for making as claimed in claim 55 is characterized in that this arcuation orifice plate is a plurality of, and also is provided with dividing plate on this extraction frame, in order to separate these arcuation orifice plates.
57. method for making as claimed in claim 50 is characterized in that this sintering program, is in vacuum 10
-1～10
-4Under the Torr environment, 1200～1300 ℃ of temperature, one to three hour heat time heating time, shuttle silver embryo during sintering obtains.
58. method for making as claimed in claim 50 is characterized in that the density of shuttle silver embryo in this is about 7.52g/cm
3
59. method for making as claimed in claim 50 is characterized in that living embryo of shuttle is provided with the support runners in this.
60. method for making as claimed in claim 59 is characterized in that this support runners is provided in a side of on the arc limit of the living embryo of shuttle in this.
61. method for making as claimed in claim 50 is characterized in that should being positioned on the ceramic gasket by the living embryo of middle shuttle in this sintering program, then is provided with ceramic separator between the living embryo of shuttle in these and separates.
62. method for making as claimed in claim 50 is characterized in that in this sintering program, the alumina powder that use is piled up supports the living embryo of shuttle in this, and should the living embryo of middle shuttle be to place on the ceramic gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96109875A CN1060981C (en) | 1996-09-27 | 1996-09-27 | Manufacture of precise cop latch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96109875A CN1060981C (en) | 1996-09-27 | 1996-09-27 | Manufacture of precise cop latch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1178149A true CN1178149A (en) | 1998-04-08 |
| CN1060981C CN1060981C (en) | 2001-01-24 |
Family
ID=5120684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96109875A Expired - Lifetime CN1060981C (en) | 1996-09-27 | 1996-09-27 | Manufacture of precise cop latch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060981C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011276A (en) * | 2010-10-28 | 2011-04-13 | 宁波市鄞州勇耀缝制机械有限公司 | Process for manufacturing rotating shuttle inner shuttle bottom supporting structure |
| CN102031649A (en) * | 2010-12-24 | 2011-04-27 | 宁波市鄞州勇耀缝制机械有限公司 | Outer shuttle of rotating shuttle and manufacturing process thereof |
| CN102230099A (en) * | 2011-04-01 | 2011-11-02 | 浙江恒成硬质合金有限公司 | Protective device for ultrahigh fine hard alloy sintered product |
| CN102847944A (en) * | 2012-04-27 | 2013-01-02 | 宝得粉末注射成形（常熟）有限公司 | Method for processing yarn guide nozzle for computer flat knitting machine |
| CN102847945A (en) * | 2012-04-27 | 2013-01-02 | 宝得粉末注射成形（常熟）有限公司 | Processing method of special-shaped micro yarn feeding pipe |
| CN102941345A (en) * | 2012-11-27 | 2013-02-27 | 浙江一火科技有限公司 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
| CN103433492A (en) * | 2013-08-20 | 2013-12-11 | 哈尔滨工大宇航精工科技有限公司 | Blow molding method for powder of metal hollow product |
| CN103678440A (en) * | 2012-08-31 | 2014-03-26 | 卡西欧计算机株式会社 | File processing apparatus and file processing method |
| CN107584124A (en) * | 2016-07-10 | 2018-01-16 | 浙江火科技股份有限公司 | A kind of metal injection moulding production method of shuttle frame new alloy material |
| CN107775002A (en) * | 2016-08-31 | 2018-03-09 | 浙江火科技股份有限公司 | A kind of method for avoiding rotating shuttle rack from being collapsed when sintering |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086861A (en) * | 1992-11-11 | 1994-05-18 | 林汉水 | The method for making of precision parts of sewing machine |
-
1996
- 1996-09-27 CN CN96109875A patent/CN1060981C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011276B (en) * | 2010-10-28 | 2012-09-26 | 宁波市鄞州勇耀缝制机械有限公司 | Process for manufacturing rotating shuttle inner shuttle bottom supporting structure |
| CN102011276A (en) * | 2010-10-28 | 2011-04-13 | 宁波市鄞州勇耀缝制机械有限公司 | Process for manufacturing rotating shuttle inner shuttle bottom supporting structure |
| CN102031649A (en) * | 2010-12-24 | 2011-04-27 | 宁波市鄞州勇耀缝制机械有限公司 | Outer shuttle of rotating shuttle and manufacturing process thereof |
| CN102230099A (en) * | 2011-04-01 | 2011-11-02 | 浙江恒成硬质合金有限公司 | Protective device for ultrahigh fine hard alloy sintered product |
| CN102847944A (en) * | 2012-04-27 | 2013-01-02 | 宝得粉末注射成形（常熟）有限公司 | Method for processing yarn guide nozzle for computer flat knitting machine |
| CN102847945A (en) * | 2012-04-27 | 2013-01-02 | 宝得粉末注射成形（常熟）有限公司 | Processing method of special-shaped micro yarn feeding pipe |
| CN103678440A (en) * | 2012-08-31 | 2014-03-26 | 卡西欧计算机株式会社 | File processing apparatus and file processing method |
| CN102941345A (en) * | 2012-11-27 | 2013-02-27 | 浙江一火科技有限公司 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
| CN102941345B (en) * | 2012-11-27 | 2014-11-12 | 浙江一火科技有限公司 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
| CN103433492A (en) * | 2013-08-20 | 2013-12-11 | 哈尔滨工大宇航精工科技有限公司 | Blow molding method for powder of metal hollow product |
| CN103433492B (en) * | 2013-08-20 | 2015-04-15 | 哈尔滨工大宇航精工科技有限公司 | Blow molding method for powder of metal hollow product |
| CN107584124A (en) * | 2016-07-10 | 2018-01-16 | 浙江火科技股份有限公司 | A kind of metal injection moulding production method of shuttle frame new alloy material |
| CN107775002A (en) * | 2016-08-31 | 2018-03-09 | 浙江火科技股份有限公司 | A kind of method for avoiding rotating shuttle rack from being collapsed when sintering |
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|---|---|
| CN1060981C (en) | 2001-01-24 |
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