CN106984823A - The effective metallized ceramic forming method of vacuum switch - Google Patents
The effective metallized ceramic forming method of vacuum switch Download PDFInfo
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- CN106984823A CN106984823A CN201710160696.8A CN201710160696A CN106984823A CN 106984823 A CN106984823 A CN 106984823A CN 201710160696 A CN201710160696 A CN 201710160696A CN 106984823 A CN106984823 A CN 106984823A
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- ceramic
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- vacuum switch
- metallized ceramic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The present invention relates to a kind of effective metallized ceramic forming method of vacuum switch, belong to ceramic idiosome field shaping technique.Its effective metallized ceramic of vacuum switch being molded by shaping, Vehicle Processing, sintering and cleaning.The present invention is simple to operate, using dry bag isostatic compacting press, is once completed from the demoulding is fed to, efficiently convenient；Required shape is made through Vehicle Processing for the ceramic idiosome of isostatic pressing, reduces ceramic idiosome and irony contacting dies in process, it is to avoid small iron tramp enters product on mould, causes bad.
Description
Technical field
The present invention relates to a kind of effective metallized ceramic forming method of vacuum switch, belong to ceramic idiosome forming technique neck
Domain.
Background technology
Hot die-casting molding or hot-injection molding, are a kind of relatively broad moulding process of special cermacis production application, its base
Present principles be using paraffin melted by heat and the characteristics of freeze, lean property ceramic powder and heated paraffin liquid without plasticity is equal
It is even to be mixed to form flowable slurry, inject in metal die be molded under a certain pressure, cooling is stripped after wax liquor solidifies and taken
Go out the base substrate of forming.Base substrate is embedded to heating in adsorbent and carries out dewaxing treatment, then dewax blank sintering again through appropriate finishing
Into end article.Mainly for the production of small-medium size and baroque structural ceramics, wear-resistant ceramic, electronic ceramics, insulation pottery
Porcelain, textile ceramic, heat-stable ceramic, sealing ceramics, corrosion-resistant ceramic, resistance to thermal shock ceramic.
The existing effective metallized ceramic forming method production method of vacuum switch mainly by alundum (Al2O3), calcium carbonate,
The raw materials such as silica, kaolin and talcum powder are mixed by a certain percentage, and required ceramic embryo is made using the mode of injection moulding
Body, required product is obtained through processes such as de-waxing, high temperature sintering, cleanings.The product diameter produced using such a method is existed
Below 150mm and qualification rate is between 10% ~ 20%, it is deformation of products to cause bad main cause.
The content of the invention
It is an object of the invention to provide a kind of forming method of the effective metallized ceramic of vacuum switch, such a method facilitates fast
Victory, can effectively improve deformation of products, improve the qualification rate of product.
Technical scheme, the effective metallized ceramic forming method of vacuum switch, step is：
（1）Shaping：Using isostatic pressing method to formed product, metallized ceramic powder is put into isostatic pressing machine, is by being pressurized
System progressively pressurizes, and makes the Stress control of isostatic pressing machine in 700 ~ 980MPa, obtains ceramic idiosome, compression ratio is between 1.5% ~ 2%；
（2）Vehicle Processing：Using lathe by step（1）Prepare gained ceramic idiosome and be made required shape, lathe rotating speed 1000 ~
2000r/min, 30 ~ 100mn/min of feed speed, clamping add clamp pressure to be 0.1 ~ 1bar；
（3）Sintering：
1. the preparation of mixed solution：By 70 ~ 90 parts of aluminum oxide, 8 ~ 12 parts of kaolin and 8 ~ 15 parts of mass concentration be 6% ~
Mixed solution is made in 15% binding agent poly-vinyl alcohol solution stirring；
2. entrucking：Place to place on covering load bearing board, load bearing board above pillar, pillar on kiln car and uniformly sprayed on pad, pad
The mixed solution that 1. step prepares gained is spilt, the product after Vehicle Processing is placed on pad, the loading height of kiln car is less than fire door
30~50mm；
3. heat：The kiln car of step 2. pushes cooling zone to from heating zone by heating zone, and ceramic idiosome is sintered into heating zone
Ceramic product, the temperature control of heating zone is at 1550 ~ 1650 DEG C, and 10 ~ 15mm/min of fltting speed passes through the total time-consuming of heating zone
Control, by the total time-consuming control of heating zone in 3 ~ 6h, is controlled in 8 ~ 16h by the total time-consuming of cooling zone, obtained in 10 ~ 15h
The effective metallized ceramic first product of vacuum switch；
（4）Cleaning：By step（3）The effective metallized ceramic first product of gained vacuum switch is with alumina abrasive with mass ratio 1:5~6
Ratio be put into oscillating mill and grind 20 ~ 30 minutes, clear water is poured into, rinses and the impurity of product surface is stayed in after grinding,
Obtain the effective metallized ceramic of the vacuum switch after formed product.
Step（3）The particle diameter of the aluminum oxide is 75 ~ 100mm.
Step（3）The effective metallized ceramic first product of gained vacuum switch, contractibility 10% ~ 15%, ceramic density 3.68 ~
3.72g/cm3, microcosmic 4 ~ 6mm of crystalline size.
Step（4）The alumina abrasive is prepared by injection moulding, including spheroidal or pyrometric cone, and it is according to product design
Whether there are ripple, and the depth of ripple to determine the shape of used abrasive material.
Isostatic pressed pressing process, the difference of dry bag press and wet bag press is that useful pressure is loaded inside dry bag press and is passed
The main bag that the fabulous polyurethane material of performance is made is passed, during pressurization, antiwear hydraulic oil is acted in main bag external pressurized by transmission
On polyurethane mould inside the main bag, operating efficiency is greatly improved, the pollution of hydraulic oil is decreased.
Beneficial effects of the present invention：The present invention is simple to operate, and using dry bag isostatic compacting press, from being fed to, the demoulding is once complete
Into, efficiently it is convenient；Required shape is made through Vehicle Processing for the ceramic idiosome of isostatic pressing, reduces ceramic embryo in process
Body and irony contacting dies, it is to avoid small iron tramp enters product on mould, causes bad.
Embodiment
Metallized ceramic powder is commercially available prod in following examples.
Embodiment 1
（1）Shaping：It is molded, metallized ceramic powder is put into isostatic pressing machine, by pressure charging system progressively using isostatic pressing method
Pressurization, makes the Stress control of isostatic pressing machine in 700MPa, obtains ceramic idiosome, compression ratio 1.5%；
（2）Vehicle Processing：Ceramic idiosome is made to required shape, lathe rotating speed 1000r/min, feed speed using lathe
30mn/min, clamping adds clamp pressure 0.1bar；
（3）Sintering：
1. by 70 parts of aluminum oxide（Particle diameter 75mm）, 8 parts kaolin, 8 parts of binding agent polyvinyl alcohol（Mass concentration is 6%
Solution）Mixed solution is made in stirring；
2. placed on kiln car and place uniform sprinkling mixing on pad, pad above pillar, pillar on covering load bearing board, load bearing board
Solution, the product after Vehicle Processing is placed on pad, and the loading height of kiln car is less than fire door 30mm；
3. kiln car pushes cooling zone to from heating zone by heating zone, and ceramic idiosome is sintered into ceramic product in heating zone, heating
The temperature control in area is at 1550 DEG C, and fltting speed 10mm/min is controlled in 10h by the total time-consuming of heating zone, passes through heating zone
Total time-consuming control in 3h, controlled by the total time-consuming of cooling zone in 8h；
4. ceramic product, contractibility 15%, ceramic density 3.68g/cm are obtained3, microcosmic crystalline size 6mm.
（4）Cleaning：By product and abrasive material with 1:5 ratio is put into oscillating mill and pours into clear water after 20 minutes, punching
Wash the impurity that product surface is stayed in after grinding.
Embodiment 2
（1）Shaping：It is molded, metallized ceramic powder is put into isostatic pressing machine, by pressure charging system progressively using isostatic pressing method
Pressurization, makes the Stress control of isostatic pressing machine in 850MPa, obtains ceramic idiosome, compression ratio 1.77%；
（2）Vehicle Processing：Ceramic idiosome is made to required shape, lathe rotating speed 1800r/min, feed speed using lathe
90mn/min, clamping adds clamp pressure 0.6bar；
（3）Sintering：
1. by 80 parts of aluminum oxide（Particle diameter 80mm）, 10 parts kaolin, 10 parts of binding agent polyvinyl alcohol（10% solution）Stir
Mixing is into mixed solution；
2. placed on kiln car and place uniform sprinkling mixing on pad, pad above pillar, pillar on covering load bearing board, load bearing board
Solution, the product after Vehicle Processing is placed on pad, and the loading height of kiln car is less than fire door 40mm；
3. kiln car pushes cooling zone to from heating zone by heating zone, and ceramic idiosome is sintered into ceramic product in heating zone, heating
The temperature control in area is at 1600 DEG C, and fltting speed 12mm/min is controlled in 12h by the total time-consuming of heating zone, passes through heating zone
Total time-consuming control in 4h, controlled by the total time-consuming of cooling zone in 12h；
4. ceramic product, contractibility 14.4%, ceramic density 3.72g/cm are obtained3, microcosmic crystalline size 4mm.
（4）Cleaning：By product and abrasive material with 1:6 ratio is put into oscillating mill and pours into clear water after 30 minutes, punching
Wash the impurity that product surface is stayed in after grinding.
Embodiment 3
（1）Shaping：It is molded, metallized ceramic powder is put into isostatic pressing machine, by pressure charging system progressively using isostatic pressing method
Pressurization, makes the Stress control of isostatic pressing machine in 980MPa, obtains ceramic idiosome, compression ratio 2%；
（2）Vehicle Processing：Ceramic idiosome is made to required shape, lathe rotating speed 2000r/min, feed speed using lathe
100mn/min, clamping adds clamp pressure 1bar；
（3）Sintering：
1. by 90 parts of aluminum oxide（Particle diameter 100mm）, 12 parts kaolin, 15 parts of binding agent polyvinyl alcohol（15% solution）
Mixed solution is made in stirring；
2. placed on kiln car and place uniform sprinkling mixing on pad, pad above pillar, pillar on covering load bearing board, load bearing board
Solution, the product after Vehicle Processing is placed on pad, and the loading height of kiln car is less than fire door 50mm；
3. kiln car pushes cooling zone to from heating zone by heating zone, and ceramic idiosome is sintered into ceramic product in heating zone, heating
The temperature control in area is at 1650 DEG C, and fltting speed 15mm/min is controlled in 15h by the total time-consuming of heating zone, passes through heating zone
Total time-consuming control in 6h, controlled by the total time-consuming of cooling zone in 16h；
4. ceramic product, contractibility 15%, ceramic density 3.72g/cm are obtained3, microcosmic crystalline size 5mm.
（4）Cleaning：By product and abrasive material with 1:5.6 ratio is put into oscillating mill and pours into clear water after 28 minutes,
Rinse the impurity that product surface is stayed in after grinding.
Claims (4)
1. the effective metallized ceramic forming method of vacuum switch, it is characterized in that step is：
（1）Shaping：Using isostatic pressing method to formed product, metallized ceramic powder is put into isostatic pressing machine, is by being pressurized
System progressively pressurizes, and makes the Stress control of isostatic pressing machine in 700 ~ 980MPa, obtains ceramic idiosome, compression ratio is between 1.5% ~ 2%；
（2）Vehicle Processing：Using lathe by step（1）Prepare gained ceramic idiosome and be made required shape, lathe rotating speed 1000 ~
2000r/min, 30 ~ 100mn/min of feed speed, clamping add clamp pressure to be 0.1 ~ 1bar；
（3）Sintering：
1. the preparation of mixed solution：By 70 ~ 90 parts of aluminum oxide, 8 ~ 12 parts of kaolin and 8 ~ 15 parts of mass concentration be 6% ~
Mixed solution is made in 15% binding agent poly-vinyl alcohol solution stirring；
2. entrucking：Place to place on covering load bearing board, load bearing board above pillar, pillar on kiln car and uniformly sprayed on pad, pad
The mixed solution that 1. step prepares gained is spilt, the product after Vehicle Processing is placed on pad, the loading height of kiln car is less than fire door
30~50mm；
3. heat：The kiln car of step 2. pushes cooling zone to from heating zone by heating zone, and ceramic idiosome is sintered into heating zone
Ceramic product, the temperature control of heating zone is at 1550 ~ 1650 DEG C, and 10 ~ 15mm/min of fltting speed passes through the total time-consuming of heating zone
Control, by the total time-consuming control of heating zone in 3 ~ 6h, is controlled in 8 ~ 16h by the total time-consuming of cooling zone, obtained in 10 ~ 15h
The effective metallized ceramic first product of vacuum switch；
（4）Cleaning：By step（3）The effective metallized ceramic first product of gained vacuum switch is with alumina abrasive with mass ratio 1:5~6
Ratio be put into oscillating mill and grind 20 ~ 30 minutes, clear water is poured into, rinses and the impurity of product surface is stayed in after grinding,
Obtain the effective metallized ceramic of the vacuum switch after formed product.
2. the effective metallized ceramic forming method of vacuum switch as claimed in claim 1, it is characterized in that：Step（3）The oxidation
The particle diameter of aluminium is 75 ~ 100mm.
3. the effective metallized ceramic forming method of vacuum switch as claimed in claim 1, it is characterized in that：Step（3）Gained vacuum
Switching tube metallized ceramic first product, contractibility 10% ~ 15%, 3.68 ~ 3.72g/cm of ceramic density3, microcosmic crystalline size 4
~6mm。
4. the effective metallized ceramic forming method of vacuum switch as claimed in claim 1, it is characterized in that：Step（4）The oxidation
Aluminium abrasive material is prepared by injection moulding, including spheroidal or pyrometric cone, and whether it has a ripple according to product design, and ripple depth
The shallow shape to determine used abrasive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710160696.8A CN106984823A (en) | 2017-03-17 | 2017-03-17 | The effective metallized ceramic forming method of vacuum switch |
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| CN201710160696.8A CN106984823A (en) | 2017-03-17 | 2017-03-17 | The effective metallized ceramic forming method of vacuum switch |
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| CN106984823A true CN106984823A (en) | 2017-07-28 |
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| CN201710160696.8A Pending CN106984823A (en) | 2017-03-17 | 2017-03-17 | The effective metallized ceramic forming method of vacuum switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916303A (en) * | 2020-09-04 | 2020-11-10 | 浙江瑞光真空电气有限公司 | Vacuum switch tube for circuit breaker and manufacturing method of shell of vacuum switch tube |
Citations (5)
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|---|---|---|---|---|
| JP4376127B2 (en) * | 2004-05-24 | 2009-12-02 | 株式会社日立製作所 | Manufacturing method of mold for vacuum casting |
| CN101670435A (en) * | 2009-10-16 | 2010-03-17 | 珠海美利信新材料技术有限公司 | Method for preparing high-toughness high-density tungsten alloy ring |
| CN104308956A (en) * | 2014-09-29 | 2015-01-28 | 无锡康伟工程陶瓷有限公司 | Ceramic green body with low shrinking percentage and production method thereof |
| CN104402415A (en) * | 2014-11-10 | 2015-03-11 | 无锡康伟工程陶瓷有限公司 | Production method of silicon controlled rectifier deep diameter product |
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2017
- 2017-03-17 CN CN201710160696.8A patent/CN106984823A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| JP4376127B2 (en) * | 2004-05-24 | 2009-12-02 | 株式会社日立製作所 | Manufacturing method of mold for vacuum casting |
| CN101670435A (en) * | 2009-10-16 | 2010-03-17 | 珠海美利信新材料技术有限公司 | Method for preparing high-toughness high-density tungsten alloy ring |
| CN104308956A (en) * | 2014-09-29 | 2015-01-28 | 无锡康伟工程陶瓷有限公司 | Ceramic green body with low shrinking percentage and production method thereof |
| CN104402415A (en) * | 2014-11-10 | 2015-03-11 | 无锡康伟工程陶瓷有限公司 | Production method of silicon controlled rectifier deep diameter product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916303A (en) * | 2020-09-04 | 2020-11-10 | 浙江瑞光真空电气有限公司 | Vacuum switch tube for circuit breaker and manufacturing method of shell of vacuum switch tube |
| WO2022048322A1 (en) * | 2020-09-04 | 2022-03-10 | 天津首瑞智能电气有限公司 | Vacuum switch tube for circuit breaker and method for manufacturing outer casing thereof |
| CN114342030A (en) * | 2020-09-04 | 2022-04-12 | 天津首瑞智能电气有限公司 | Vacuum switch tube for circuit breaker and manufacturing method of shell of vacuum switch tube |
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Application publication date: 20170728 |
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