CN102941345A - Method for manufacturing outer shuttle of rotating shuttle by injection molding - Google Patents
Method for manufacturing outer shuttle of rotating shuttle by injection molding Download PDFInfo
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- CN102941345A CN102941345A CN2012104931713A CN201210493171A CN102941345A CN 102941345 A CN102941345 A CN 102941345A CN 2012104931713 A CN2012104931713 A CN 2012104931713A CN 201210493171 A CN201210493171 A CN 201210493171A CN 102941345 A CN102941345 A CN 102941345A
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Abstract
The invention discloses a method for manufacturing an outer shuttle of a rotating shuttle by injection molding. The outer shuttle of the rotating shuttle is made of alloy materials including Fe2Ni, Mo, FeCrMo or FeCr. The method for manufacturing the outer shuttle of the rotating shuttle includes the steps: (1) mixing raw alloy powder in a segregation-free manner; (2) alloying the raw alloy powder; (3) screening the raw alloy powder; (4) preparing feed with the raw alloy powder; (5) performing injection molding of the feed; (6) sintering the molded outer shuttle of the rotating shuttle; (7) shaping the surface of the outer shuttle to reach needed size; and (8) performing sand blasting or polishing for the surface of the outer shuttle. The Fe2Ni, the Mo, the FeCrMo or the FeCr is used as raw materials, composition segregation and unnecessary internal impurities are eliminated, the outer shuttle is fine in sintering shrinkage uniformity, the granularity of the raw material powder is proportionally adjusted within the range of nanometers to 80 micrometer as needed, the cost of raw materials is greatly reduced, and the density and the performance of the outer shuttle meet requirements.
Description
Technical field
The present invention relates to the sewing machine accessory, relate in particular to the outer shuttle of rotating shuttle in the sewing machine.
Background technology
Outer shuttle of rotating shuttle is one of main accessory in the rotating shuttle.Be somebody's turn to do outer tatting structure complicated, make meticulous.Existing preparation method generally adopts cold extrusion and car, mill machining process makes, and makes manufacturing procedure loaded down with trivial details, and complex process (up to 300 multiple working procedures) can't large-scale production, and the metal material utilization rate is low.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of method of utilizing injection moulding to make outer shuttle of rotating shuttle, and technique is simple, and production efficiency is high, and the metal material utilization rate is high.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of method of utilizing injection moulding to make outer shuttle of rotating shuttle, it is characterized in that: the alloy material that described outer shuttle of rotating shuttle adopts is Fe2Ni Mo, FeCrMo or FeCr, and the manufacture method of this outer shuttle of rotating shuttle comprises the steps:
(1) raw material alloy powder being carried out segregation-free mixes;
(2) raw material alloy powder is carried out Alloying Treatment;
(3) raw material alloy powder is ground sieve,
(4) raw material alloy powder is carried out feedstock preparation;
(5) feeding is carried out injection moulding;
(6) outer shuttle of rotating shuttle carries out sintering after the moulding;
(7) surperficial Shape correction reaches required size;
(8) sandblast or polishing are carried out in the surface.
Preferably, to contain by weight 0.2～0.3%Mo powder, 1.5～2.5% carbonyl nickel powders, surplus be carbonyl iron dust to the raw material alloy powder of described Fe2Ni Mo.
Preferably, to contain by weight 0.2～0.3%Mo powder, 1.5～2.5%Cr powder, surplus be carbonyl iron dust to the raw material alloy powder of described FeCrMo.
Preferably, the raw material alloy powder of described FeCr contains 0.5～1.5%Cr powder by weight, surplus is carbonyl iron dust.
Preferably, the granularity behind the described raw material alloy powder mill sieve is 0.5 ~ 80 micron.
Preferably, 200 ~ 800 ℃ of the temperature of described Alloying Treatment, alloying time 0.2 ~ 6 hour.
Preferably, described injection molding condition is 140 ~ 180 ℃ of injection temperatures, injection pressure 80 ~ 100MPa, 10 ~ 60 ℃ of mold temperatures.
Preferably, the condition of described sintering is 800～1300 ℃ of sintering temperatures, and sintering time is 20 ~ 3600min, and atmosphere is vacuum-sintering or protective atmosphere sintering.
Preferably, sintering adopts continuous sintering furnace, this continuous sintering furnace comprises a combined type body of heater, the burner of described body of heater is provided with liftable fire door and charging aperture, the stove tail is provided with liftable fire door and discharging opening, described body of heater is disposed with the degreasing section from burner to the stove tail, sintering stage, the slow cooling section, cooling section, described degreasing section is provided with at least one inert gas pipeline, the gas outlet subsection setup of described inert gas pipeline is in degreasing section burner hearth, simultaneously degreasing section is provided with at least one control carbon gas pipeline, the gas outlet subsection setup of described control carbon gas pipeline is in degreasing section burner hearth, described inert gas pipeline enters burner hearth from degreasing section left end, described control carbon gas pipeline enters burner hearth from degreasing section right-hand member, and described inert gas pipeline and control carbon gas pipeline are provided with flow control valve.
Preferably, described degreasing section is provided with at least two cooling passages that are communicated with flue and body of heater outer air, this cooling passage is for closing and regulate the adjustable passage of throughput, described degreasing section front end below arranges long-pending wax tank, and described long-pending wax tank is provided with grafting wax mouth, inert gas entrance and exhaust-valve.
It is raw material that the present invention adopts Fe2Ni Mo, FeCrMo or FeCr, has eliminated component segregation and unnecessary intrinsic contaminants, product sintering shrinkage high conformity; Raw material powder particle size carries out proportioning as required between nanometer to 80 micron regulates, and cost of material is significantly reduced, and product density, performance are satisfied the demand.
In addition, the present invention sets up the shaping step, eliminates the product rejection that causes because of micro-deformation, improves product percent of pass, reduces product rejection rate.
Thereby technique of the present invention is simple, and production efficiency is high, and the metal material utilization rate is high.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments:
Fig. 1 is the used sintering furnace structural representation of sintering;
Fig. 2 is degreasing section inert gas pipeline structural representation;
Fig. 3 is degreasing section cooling vent hole structure schematic diagram;
Fig. 4 is the long-pending wax jar structure schematic diagram of degreasing section;
Fig. 5 is the slow cooling section structural representation;
Fig. 6 is the cooling section structural representation;
Fig. 7 is cooling section admission line structural representation;
Fig. 8 is gas distribution pipe structural representation in the cooling section admission line;
Fig. 9 is the temperature alarming device structural representation;
Figure 10 is temperature alarming device control principle schematic diagram.
The specific embodiment
The below specifies the embodiment of outer shuttle of rotating shuttle manufacture method of the present invention.
Embodiment 1:
Alloy material is Fe2Ni Mo, and its raw material consists of: 2% carbonyl nickel powder, 0.25%Mo powder, remaining powder are carbonyl iron dust, 0.5 ~ 80 micron of raw material granularity.At first alloy powder carries out segregation-free and mixes, and then alloy powder is placed in the stove Alloying Treatment under protective atmosphere.200 ~ 800 ℃ for the treatment of temperatures, alloying time 0.2 ~ 6 hour, it is vacuum drying oven that Alloying Treatment adopts body of heater, have continuous oven or batch stove of logical protective gas (inert gas, reducibility gas).After the Alloying Treatment, powder grinds sieve.The raw alloy Powder Particle Size that obtains behind the mill sieve is 0.5 ~ 80 micron.Then raw material alloy powder is carried out feedstock preparation, again feeding is carried out injection moulding; Outer shuttle of rotating shuttle carries out sintering after the moulding.
The comparing embodiment of embodiment 1 is to inject with equigranular atomizing 20Cr material; Under the equal conditions, behind the sintering, Fe2Ni material scantling first-time qualification rate 90%, 20Cr material, first-time qualification rate 60%; Atomizing 20Cr scantling shows the size abnormal deformation, and shrinkage factor is inconsistent.
Embodiment 2:
Alloy material is FeCrMo, and its raw material consists of: 1%Cr powder, 0.25%Mo powder, all the other are carbonyl iron dust, 0.5 ~ 80 micron of raw material granularity.At first carry out segregation-free and mix, then raw material alloy powder is placed in the stove Alloying Treatment under protective atmosphere.200 ~ 800 ℃ for the treatment of temperatures, alloying time 0.2 ~ 6 hour.After the Alloying Treatment, powder grinds sieve.The raw alloy Powder Particle Size that obtains behind the mill sieve is 0.5 ~ 80 micron.Then raw material alloy powder is carried out feedstock preparation, again feeding is carried out injection moulding; Outer shuttle of rotating shuttle carries out sintering after the moulding.
The comparing embodiment of embodiment 2 is injected with equigranular atomizing 20Cr material; Under the equal conditions, behind the sintering, Fe2Ni material scantling first-time qualification rate 92%, 20Cr material, first-time qualification rate 61.5%; Atomizing 20Cr scantling shows the size abnormal deformation, and shrinkage factor is inconsistent.
Embodiment 3:
Alloy material is FeCr, and its raw material consists of: the 1%Cr powder, remaining is carbonyl iron dust, 0.5 ~ 80 micron of raw material granularity.At first carry out segregation-free and mix, then raw material alloy powder is placed in the stove Alloying Treatment under protective atmosphere.200 ~ 800 ℃ of Alloying Treatment temperature, alloying time 0.2 ~ 6 hour.After the Alloying Treatment, powder grinds sieve.The raw alloy Powder Particle Size that obtains behind the mill sieve is 0.5 ~ 80 micron.Then raw material alloy powder is carried out feedstock preparation, again feeding is carried out injection moulding; Outer shuttle of rotating shuttle carries out sintering after the moulding.
The comparing embodiment of embodiment 3 is injected with equigranular atomizing 20Cr material; Under the equal conditions, behind the sintering, FeCr scantling first-time qualification rate 90.2%, 20Cr material, first-time qualification rate 61.2%; Atomizing 20Cr scantling shows the size abnormal deformation, and shrinkage factor is inconsistent.
Among above-mentioned three embodiment, the outer shuttle of rotating shuttle lock needs surperficial Shape correction to reach required size behind the sintering, and then sandblast or polishing are carried out in the surface.
Above-mentioned comparative example fully shows, adopts raw material of the present invention, carries out injection moulding, and the first-time qualification rate of product is greatly improved behind the sintering, and raw material of the present invention and manufacture method have significant superiority.
The below to moulding after outer shuttle of rotating shuttle carry out the used sintering furnace of sintering and make and specifying.
As shown in Figure 1, continuous sintering furnace for the present invention's employing, it comprises a combined type body of heater, the burner of described body of heater is provided with the liftable fire door and charging aperture 6, stove tail are provided with liftable fire door and discharging opening 60, and described body of heater is disposed with degreasing section 1, sintering stage 2, slow cooling section 3, cooling section 4 from burner to the stove tail.Described furnace binding is meshbeltfurnace or stepping beam type continuous oven; When employing pushed away boat structure sintering furnace, material boat size and fire box temperature were the integral multiple relation.
Adopt external cycling mechanism between described charging aperture 6 and the discharging opening 60.This outer circulation mechanism adopts sprocket wheel, belt or gear drive to realize.
Described body of heater is provided with sample tap 150 at the linkage section 15 of degreasing section and sintering stage, and described sample tap adopts upper shed or side opening mode.This sample tap adopts mechanical pull bar or bolted mode to open or close sample tap.
Such as Fig. 2 to the concrete structure that Figure 4 shows that the degreasing section, described degreasing section is provided with at least one inert gas pipeline 11, the gas outlet subsection setup of described inert gas pipeline is in degreasing section burner hearth 13, simultaneously degreasing section is provided with at least one control carbon gas pipeline 12, and the gas outlet subsection setup of described control carbon gas pipeline is in degreasing section burner hearth 13.Inert gas pipeline 11 and control carbon gas pipeline 12 can arrange a row or multi-row gas outlet vertically.Inert gas pipeline 11 is provided with three among Fig. 2, is respectively the first inert gas pipeline 110, the second inert gas pipeline 111, the 3rd inert gas pipeline 112, and its length that stretches into burner hearth 13 inside is different.Control carbon gas pipeline 12 also can adopt the structure identical with inert gas pipeline 11.The adjusting of control carbon gas flow direction can be undertaken by rotating control carbon gas pipeline 12, control carbon gas pipeline two ends are rotatably connected on the tuning movable joint, specifically can adopt thread connection, control carbon gas pipeline is provided with handle, turning handle, then the gas outlet direction is rotated with control carbon gas pipeline 12 and is changed, certainly, for the adjusting of the gas outlet direction that realizes inert gas pipeline 11, it also can adopt the tuning movable joint structure.
Described degreasing section is provided with at least two cooling passages 131 that are communicated with flue and body of heater outer air, and this cooling passage is for closing and regulate the adjustable passage of throughput.This cooling passage 131 passes heat-insulation layer 130 and is communicated with degreasing section flue.Passage 131 adopts the natural ventilation mode.When needs are regulated zone temperatures, can realize by the openings of sizes of opening this section upper shed, can cover opening with a rotating baffle plate, flap shutter can be regulated openings of sizes.
Control carbon gas in the described control carbon gas pipeline adopts decarburization atmosphere, and this decarburization atmosphere is H
2Perhaps H
2O or decomposed ammonia body or CO
2Perhaps O
2Also or the combination of above-mentioned gas.
Described degreasing section front end below arranges long-pending wax tank 14, and described long-pending wax tank is provided with grafting wax mouth 140, inert gas entrance 141 and exhaust-valve 142.
Be illustrated in figure 5 as the concrete structure of slow cooling section, described slow cooling section 3 arranges air-cooled jacket structured, be about to the slow cooling section and be set to the jacket pipe structure, outer tube sleeve on inner pipe, have certain space to form air-cooled chuck inner chamber 30 between outer tube and the inner tube, described air-cooled chuck inner chamber 30 is inwardly dried by an air blast 31.
Such as Fig. 6 to Figure 8 shows that the cooling section concrete structure, described cooling section arranges a liftable separated door 40 cooling section is separated, described cooling section in liftable separated door front side and rear side be respectively equipped with admission line 41, the admission line of described separated door front side is used for carrying reducibility gas, and the admission line of described separated door rear side is used for carrying inert gas.
Wherein, described admission line 41 comprises that one extends transversely into the gas distribution pipe 411 of cooling section, and these gas distribution pipe two ends are slip-knot 413, and gas distribution pipe is provided with several gas outlets 412.Slip-knot and gas distribution pipe adopt spiral marking connection, when needs are adjusted airflow direction, realize by rotating the gas distribution pipe angle.
As shown in Figure 9 and Figure 10, temperature alarming device on the degreasing section describes as example, degreasing section burner hearth 13 outer heat-insulation layers 130 are provided with a main temperature thermocouple 51 and a tracking and temperature testing thermocouple 50, described main temperature thermocouple and tracking and temperature testing thermocouple are connected with switch board 5, and switch board is provided with one and follows the tracks of overtemperature alarm 52.Switch board 5 internal controller judge whether overtemperature according to the data that main temperature thermocouple 51 and a tracking and temperature testing thermocouple 50 record, if overtemperature, then control is followed the tracks of overtemperature alarm 52 and reported to the police.
Temperature alarming device on the sintering stage is identical with temperature alarming device structure on the above-mentioned degreasing section.
In addition, the heater of described degreasing section and sintering stage adopts silicon carbide heater, and described sintering furnace arranges the sintered dimensions image acquistion system at degreasing section, sintering stage.This system has photoelectric coupling mechanism, has optical system, signal processing system, sintering shrinkage curve setting program and pushes away the compositions such as boat time setting program.
The slow cooling section is provided with protective gas admission line 32, and as the usefulness that passes into sintering gas shield gas, the slow cooling section arranges thermocouple temperature measuring apparatus, is used for the temperature of monitoring slow cooling section, is convenient in time adjust cooling velocity, reduces deformation of products.
Beneficial effect of the present invention is:
1, set up the inert gas pipeline in the segmentation of degreasing section, pipeline can carry out flow and airflow direction adjusting at different warm areas as required;
2, for avoiding the uniformity in airflow influence temperature field, establish the cooling passage in the degreasing section flue outside, avoid the burner hearth internal temperature uncontrollable;
3, in the degreasing section control carbon gas pipeline is set, control carbon gas can be adjusted at different sections as required, and airflow direction was adjustable after control carbon gas entered burner hearth inside;
4, control carbon gas adopts decarburization atmosphere, and these atmosphere comprise H
2, H
2O, decomposed ammonia body, CO
2, O
2And their combination, to adapt to control carbon needs.Contain O
2The mist gas ratio is controlled at non-explosive range.
5, for guaranteeing size uniform, adopt meshbeltfurnace, stepping beam type continuous oven; When pushing away boat structure sintering furnace, material boat size and fire box temperature are the integral multiple relation.
6, (sintering stage and cooling section) air inlet arranges the temperature control means in the slow cooling section, and the control cooling velocity reduces deformation of products;
7, at cooling section separated door is set, separated door leading portion configuration reducibility gas pipeline, the current potential during with the cooling of assurance product;
8, for guaranteeing to separate sneaking into of oxidizing gas when door opened, the inert gas seal measure is set, oxidation when causing the product cooling to avoid oxidizing atmosphere to enter the separated door leading portion separating the fire door back segment.
9, be the inhomogeneous deformation of products that causes in the temperature field of avoiding product degreasing and sintering process, in the preferred high-quality Temperature Control Measures, the control accuracy section temperature difference of temperature ± 5 ℃.These measures comprise that high-quality carborundum heater, symmetrically arranged TEMP detect the tracking measure;
10, be to realize that effectively the sintering process size is controlled, at degreasing section, sintering stage the sintered dimensions image acquistion system be set, from motion tracking product sintered dimensions situation of change, to adjust degreasing, sintering process system;
11, for avoiding burner to amass wax, long-pending wax tank body is set under burner; On the long-pending wax tank body inert gas pipeline is set, does not need the blowing out operation to guarantee the de-waxing process, nonoxidizing gas destroys system balancing;
12, be the implementation procedure continuous production, adopt external cycling mechanism, guarantee system's continuous circulation operation.
13, at the follow-up sample tap that arranges of degreasing section, be convenient to sample analysis skimming processes situation and adjust.
The present invention is applicable to the continuous degreasing sintering of cerul, plasticity system, and sintering process can realize that carbon is controlled, and atmosphere is controlled, temperature is controlled, and product size is controlled, and Product Precision is high, can match in excellence or beauty with the vacuum drying oven sintered products.
Claims (10)
1. method of utilizing injection moulding to make outer shuttle of rotating shuttle, it is characterized in that: the alloy material that described outer shuttle of rotating shuttle adopts is Fe2Ni Mo, FeCrMo or FeCr, and the manufacture method of this outer shuttle of rotating shuttle comprises the steps:
(1) raw material alloy powder being carried out segregation-free mixes;
(2) raw material alloy powder is carried out Alloying Treatment;
(3) raw material alloy powder is ground sieve,
(4) raw material alloy powder is carried out feedstock preparation;
(5) feeding is carried out injection moulding;
(6) outer shuttle of rotating shuttle carries out sintering after the moulding;
(7) surperficial Shape correction reaches required size;
(8) sandblast or polishing are carried out in the surface.
2. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1 is characterized in that: it is carbonyl iron dust that the raw material alloy powder of described Fe2Ni Mo contains 0.2～0.3%Mo powder, 1.5～2.5% carbonyl nickel powders, surplus by weight.
3. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1 is characterized in that: it is carbonyl iron dust that the raw material alloy powder of described FeCrMo contains 0.2～0.3%Mo powder, 1.5～2.5%Cr powder, surplus by weight.
4. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1, it is characterized in that: the raw material alloy powder of described FeCr contains 0.5～1.5%Cr powder by weight, surplus is carbonyl iron dust.
5. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1, it is characterized in that: the granularity behind the described raw material alloy powder mill sieve is 0.5 ~ 80 micron.
6. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1 is characterized in that: 200 ~ 800 ℃ of the temperature of described Alloying Treatment, alloying time 0.2 ~ 6 hour.
7. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1, it is characterized in that: described injection molding condition is 140 ~ 180 ℃ of injection temperatures, injection pressure 80 ~ 100MPa, 10 ~ 60 ℃ of mold temperatures.
8. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1, it is characterized in that: the condition of described sintering is 800 ~ 1300 ℃ of sintering temperatures, and sintering time is 20 ~ 3600min, atmosphere is vacuum-sintering or protective atmosphere sintering.
9. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 1, it is characterized in that: sintering adopts continuous sintering furnace, this continuous sintering furnace comprises a combined type body of heater, the burner of described body of heater is provided with liftable fire door and charging aperture, the stove tail is provided with liftable fire door and discharging opening, described body of heater is disposed with the degreasing section from burner to the stove tail, sintering stage, the slow cooling section, cooling section, described degreasing section is provided with at least one inert gas pipeline, the gas outlet subsection setup of described inert gas pipeline is in degreasing section burner hearth, simultaneously degreasing section is provided with at least one control carbon gas pipeline, the gas outlet subsection setup of described control carbon gas pipeline is in degreasing section burner hearth, described inert gas pipeline enters burner hearth from degreasing section left end, described control carbon gas pipeline enters burner hearth from degreasing section right-hand member, and described inert gas pipeline and control carbon gas pipeline are provided with flow control valve.
10. the method for utilizing injection moulding to make outer shuttle of rotating shuttle according to claim 9, it is characterized in that: described degreasing section is provided with at least two cooling passages that are communicated with flue and body of heater outer air, this cooling passage is for closing and regulate the adjustable passage of throughput, described degreasing section front end below arranges long-pending wax tank, and described long-pending wax tank is provided with grafting wax mouth, inert gas entrance and exhaust-valve.
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|---|---|---|---|
| CN201210493171.3A CN102941345B (en) | 2012-11-27 | 2012-11-27 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
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|---|---|---|---|
| CN201210493171.3A CN102941345B (en) | 2012-11-27 | 2012-11-27 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104550973A (en) * | 2013-10-11 | 2015-04-29 | 浙江一火科技有限公司 | Method for preparing artificial acetabulum cup |
| CN104975232A (en) * | 2014-04-04 | 2015-10-14 | 浙江一火科技有限公司 | Wear-resistant alloy rotating shuttle |
| 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 |
| CN110125414A (en) * | 2019-04-16 | 2019-08-16 | 南京恒缇电子有限公司 | A kind of technique of injection molding machine production metal product |
| CN110947955A (en) * | 2019-12-23 | 2020-04-03 | 广东东睦新材料有限公司 | Powder metallurgy preparation process of inverter insert |
| CN111570803A (en) * | 2020-06-19 | 2020-08-25 | 程浩 | Manufacturing method of sewing machine spare and accessory parts |
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| CN104550973A (en) * | 2013-10-11 | 2015-04-29 | 浙江一火科技有限公司 | Method for preparing artificial acetabulum cup |
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| CN110947955A (en) * | 2019-12-23 | 2020-04-03 | 广东东睦新材料有限公司 | Powder metallurgy preparation process of inverter insert |
| CN111570803A (en) * | 2020-06-19 | 2020-08-25 | 程浩 | Manufacturing method of sewing machine spare and accessory parts |
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|---|---|
| CN102941345B (en) | 2014-11-12 |
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