CN102581281B - Manufacturing method of mobile phone oscillator - Google Patents
Manufacturing method of mobile phone oscillator Download PDFInfo
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- CN102581281B CN102581281B CN201110429475.9A CN201110429475A CN102581281B CN 102581281 B CN102581281 B CN 102581281B CN 201110429475 A CN201110429475 A CN 201110429475A CN 102581281 B CN102581281 B CN 102581281B
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- tungsten
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Abstract
The invention relates to a manufacturing method of a mobile phone oscillator, which is characterized in comprising the following steps: (1) mixing tungsten-based alloy powder and water-soluble adhesive at the temperature range of 165-180 DEG C to obtain a mixture; (2) forming a blank of the mobile phone oscillator through compression molding; (3) performing degreasing on the obtained blank of the mobile phone oscillator to remove the adhesive; and (4) performing microwave sintering under the protection of nitrogen to obtain the mobile phone oscillator. Compared with the prior art, the manufacturing method provided by the invention has the following advantages: the water-soluble adhesive is adopted to reduce the degreasing temperature, so as to reduce the holding time during the degreasing; the microwave sintering is adopted to reduce the sintering temperature, so as to shorten the holding time; therefore, the time for realizing the technology is finally shortened above 50%, and the energy consumption is reduced by above 50%.
Description
Technical field
The present invention relates to the part preparation method of zero of a kind of tungsten-bast alloy material.
Background technology
Conventionally adopt powder pressing explained hereafter handset vibrator, pack in mould by tungsten-bast alloy powder, form pressed compact at certain pressure compacted under, then by pressed compact at high temperature sintering obtain handset vibrator.But because the draw ratio of handset vibrator is large, be not easy to obtain the pressed compact of even density, after sintering shrinkage may there is distortion in size, and shape and the precision of goods are restive.And handset vibrator also has the labyrinths such as step, conventionally also need follow-up machined, operation is many and complicated.
Researcher has done technological improvement for this reason, see that the patent No. is the Chinese invention patent " a kind of method of manufacturing handset vibrator " (Granted publication number is CN101396734B) of ZL200710154684.0, this patent one-shot forming, machining accuracy is also high, compare traditional technique process and greatly reduce, but integrated artistic process cycle is still longer, and energy consumption is higher, be mainly that sintering furnace energy consumption is high because degreasing and sintering process complexity, temperature are high, temperature retention time is long.Meanwhile, in this patent, adopt the poisonous organic solvent degreasings such as trichloro-ethylene, unfriendly to environment, injection moulding, in order to be increased in the mobility of feeding in grinding tool, needs the bonding agent of interpolation more, after degreasing, the uniformity of shape-retaining ability, dimensional contraction is bad, and then affects the dimensional accuracy after sintering.
Summary of the invention
Technical problem to be solved by this invention is the preparation method that a kind of handset vibrator low, technique is short that consumes energy is provided for the above-mentioned state of the art.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of preparation method of handset vibrator, is characterized in that comprising the steps:
1. tungsten-bast alloy powder is mixed at the temperature of 165～180 ℃ with water miscible bonding agent, obtain mixture;
2. be handset vibrator blank by the compression molding of gained mixture;
3. gained handset vibrator blank is carried out to ungrease treatment to remove bonding agent wherein;
4. finally under nitrogen protection, carry out microwave sintering, prepare handset vibrator.
As preferably, the bonding agent of step described in 1. comprises following component and weight proportion thereof:
60～80 parts of polyethylene glycol
10～30 parts of polyformaldehyde
1～5 part of SSS
1～5 part of dioctyl phthalate.
Above-mentioned water soluble adhesive can make follow-up degreasing process simple, only need in water, heat degreasing, then dries; Meanwhile, skimming temp is low, generally following at 100 ℃.Without using the poisonous organic solvent degreasings such as trichloro-ethylene, environmentally friendly in addition.
Step 1. in the mass ratio of tungsten-bast alloy powder and bonding agent be 20～50: 1.In prior art, injection moulding, in order to be increased in the mobility of feeding in grinding tool, need mix with more bonding agent, and the follow-up compression molding of the application needs little bonding agent, so the ratio of bonding agent and tungsten alloy is also different.
As preferably, step 3. in ungrease treatment condition be: described blank is put into degreasing equipment and is warming up to 50～100 ℃ and be incubated 0.5～2 hour.
As preferably, the tungsten that the tungsten-bast alloy powder of step in 1. contains 85～95 weight portions, the nickel of 1～7 weight portion, the copper of 1～5 weight portion.
As preferably, the tungsten-bast alloy powder particles size of step in is 1. 0.5-10 μ m.
As preferably, step 2. in compression molding pressure be 10～20KN.
As preferably, step 4. in microwave sintering condition be: in microwave agglomerating furnace, under the frequency of 1～5GHz, be heated to 1350～1500 ℃ with the heating power of 800～3000W, be incubated 30～60 minutes.
Compared with prior art, the invention has the advantages that: the process time shortens greatly, energy consumption significantly reduces, and relative density, the mesopore crushing strength of handset vibrator also increase simultaneously.Adopt water soluble adhesive to reduce skimming temp, reduce degreasing temperature retention time, and avoided the environmental pollution that uses poisonous organic solvent degreasing to bring; Select mold pressing can well control the size of handset vibrator; By using the mode of microwave sintering to reduce sintering temperature, shortening temperature retention time, grain size that simultaneously can refinement product is to improve its comprehensive mechanical property.Finally can realize technique duration and shorten more than 50%, Energy Intensity Reduction is more than 50%, and combination property is not less than the handset vibrator that conventional method is manufactured.
The specific embodiment
Below in conjunction with embodiment and comparative example, the present invention is described in further detail.
Embodiment 1:
Prepare bonding agent: the dioctyl phthalate mixing bonding agent of the SSS of the polyformaldehyde of the polyethylene glycol that contains 74 weight portions, 24 weight portions, 1 weight portion, 1 weight portion is mixed 40 minutes at the temperature of 140 ℃.
Tungsten-bast alloy powder powder is mixed with bonding agent: tungsten-bast alloy powder and bonding agent, with the ratio of quality 25-1, are mixed 1 hour; The copper of the tungsten that wherein said tungsten-bast alloy powder contains 93 weight portions, the nickel of 5 weight portions, 2 weight portions.
Compression molding: by the mixture of described tungsten-bast alloy powder and bonding agent, put into corresponding mould, with the pressure of 10KN, compressing, form blank.
Degreasing: described blank is put into degreasing equipment and be warming up to 70 ℃ and be incubated 2 hours.
Sintering: first by degreasing blank under nitrogen protection, in micro-wave oven, carry out sintering with 1375 ℃, and be incubated 40 minutes.
Embodiment 2:
Prepare bonding agent: the dioctyl phthalate mixing bonding agent of the SSS of the polyformaldehyde of the polyethylene glycol that contains 76 weight portions, 22 weight portions, 1 weight portion, 1 weight portion is mixed 40 minutes at the temperature of 140 ℃.
Tungsten-bast alloy powder powder is mixed with bonding agent: tungsten-bast alloy powder and bonding agent, with the quality ratio of 35: 1, are mixed 1 hour; The copper of the tungsten that wherein said tungsten-bast alloy powder contains 95 weight portions, the nickel of 2 weight portions, 3 weight portions.
Compression molding: by the mixture of described tungsten-bast alloy powder and bonding agent, put into corresponding mould, with the pressure of 15KN, compressing, form blank.
Degreasing: described blank is put into degreasing equipment and be warming up to 75 ℃ and be incubated 2 hours.
Sintering: first by degreasing blank under nitrogen protection, in micro-wave oven, carry out sintering with 1410 ℃, and be incubated 30 minutes.
Embodiment 3:
Prepare bonding agent: the dioctyl phthalate mixing bonding agent of the SSS of the polyformaldehyde of the polyethylene glycol that contains 75 weight portions, 23 weight portions, 1 weight portion, 1 weight portion is mixed 40 minutes at the temperature of 140 ℃.
Tungsten-bast alloy powder powder is mixed with bonding agent: tungsten-bast alloy powder and bonding agent, with 45: 1 ratios of quality, are mixed 1 hour; The copper of the tungsten that wherein said tungsten-bast alloy powder contains 95 weight portions, the nickel of 3 weight portions, 2 weight portions.
Compression molding: by the mixture of described tungsten-bast alloy powder and bonding agent, put into corresponding mould, with the pressure of 20KN, compressing, form blank.
Degreasing: described blank is put into degreasing equipment and be warming up to 70 ℃ and be incubated 2.5 hours.
Sintering: first by degreasing blank under nitrogen protection, in micro-wave oven, carry out sintering with 1450 ℃, and be incubated 50 minutes.
Wherein, above-described embodiment is comparatively preferred three embodiment of the application.
Comparative example:
Prepare bonding agent: the stearic mixing bonding agent of the high density polyethylene (HDPE) of the Brazil wax of the paraffin of the ethene-vinyl acetate copolymer that contains 20 weight portions, 55 weight portions, 15 weight portions, 5 weight portions, 5 weight portions is mixed 1 hour at 160 ℃ of temperature;
Tungsten-bast alloy powder is mixed with bonding agent: by volume, tungsten-bast alloy powder is mixed 1 hour at 180 ℃ of temperature to the tungsten that wherein said tungsten-bast alloy powder contains 87 weight portions, the nickel of 7 weight portions, the iron of 4 weight portions and the copper of 2 weight portions with the ratio of 80: 20 with bonding agent;
Injection moulding: the condition hemostasis moulding by the mixture of described tungsten-bast alloy powder and bonding agent 60 ℃ of 150 ℃ of injection pressure 60MPa mould temperature of injection temperature, forms blank.
Degreasing: described blank is put into trichloro-ethylene liquid and be heated to 60 ℃ of insulations 3 hours; then blank is put in debinding furnace; under hydrogen shield, be heated to 350 ℃ and be incubated 0.5 hour with 15 ℃/min speed, then continue to be warming up to 600 ℃ and be incubated 0.5 hour.
Sintering: first degreasing blank is heated to 900 ℃ and does presintering 2 hours, then be placed in vacuum drying oven, sintering 3 hours at 1380 ℃.
The each embodiment of table 1 and the contrast of comparative example's gained handset vibrator parameters
| Parameter | Comparative example | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Relative density (%) | 98 | 98 | 98.5 | 99.1 |
| Mesopore crushing strength (KN) | 4.1 | 4.1 | 4.2 | 4.5 |
| Technique duration (H) | 11.5 | 6.4 | 6.5 | 6.7 |
| Energy consumption (KW) | 425 | 171.5 | 172.7 | 173.9 |
Can find out from above-described embodiment and comparative example's comparative result, manufacture method provided by the invention is compared with existing manufacture method, and relative density, the mesopore crushing strength of the handset vibrator obtaining are slightly high.And technique duration and energy consumption all significantly reduce.
Claims (6)
1. a preparation method for handset vibrator, is characterized in that comprising the steps:
1. tungsten-bast alloy powder is mixed at the temperature of 165～180 ℃ with water miscible bonding agent, obtain mixture;
2. be handset vibrator blank by the compression molding of gained mixture;
3. gained handset vibrator blank is carried out to ungrease treatment to remove bonding agent wherein;
4. finally under nitrogen protection, carry out microwave sintering, prepare handset vibrator;
The bonding agent of step described in 1. comprises following component and weight proportion thereof:
The tungsten that the tungsten-bast alloy powder of step in 1. contains 85～95 weight portions, the nickel of 1～7 weight portion, the copper of 1～5 weight portion.
2. preparation method according to claim 1, is characterized in that during step 1., the mass ratio of tungsten-bast alloy powder and bonding agent is 20～50:1.
3. preparation method according to claim 2, is characterized in that during step 3. that ungrease treatment condition is: described blank is put into degreasing equipment and be warming up to 50～100 ℃ and be incubated 0.5～2 hour.
4. preparation method according to claim 1, is characterized in that the tungsten-bast alloy powder particles size during step is 1. 0.5-10 μ m.
5. preparation method according to claim 1, it is characterized in that step 2. in compression molding pressure be 10～20KN.
6. preparation method according to claim 1, it is characterized in that step 4. in microwave sintering condition be: in microwave agglomerating furnace, under the frequency of 1～5GHz, be heated to 1350～1500 ℃ with the heating power of 800～3000W, be incubated 30～60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110429475.9A CN102581281B (en) | 2011-12-20 | 2011-12-20 | Manufacturing method of mobile phone oscillator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110429475.9A CN102581281B (en) | 2011-12-20 | 2011-12-20 | Manufacturing method of mobile phone oscillator |
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| CN102581281A CN102581281A (en) | 2012-07-18 |
| CN102581281B true CN102581281B (en) | 2014-06-25 |
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| CN201110429475.9A Expired - Fee Related CN102581281B (en) | 2011-12-20 | 2011-12-20 | Manufacturing method of mobile phone oscillator |
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| CN107716929A (en) * | 2017-08-21 | 2018-02-23 | 柳州科尔特锻造机械有限公司 | The forging method of counterweight peculiar to vessel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1119213C (en) * | 2000-09-13 | 2003-08-27 | 湖南英捷高科技有限责任公司 | Technology for making high-specific-weight alloy parts in different shapes |
| US6705848B2 (en) * | 2002-01-24 | 2004-03-16 | Copeland Corporation | Powder metal scrolls |
| KR100494734B1 (en) * | 2002-10-24 | 2005-06-13 | 한성재 | Manufacturing method of a vibrator for vibration motor of mobile phone |
| CN101396734B (en) * | 2007-09-25 | 2010-11-24 | 比亚迪股份有限公司 | Handset vibrator manufacture method |
| CN101623760B (en) * | 2009-07-24 | 2012-01-25 | 厦门理工学院 | Application of micro injection molding technique for preparing tungsten-base alloy product and micro injection molding method of tungsten-base alloy powder |
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