CN104589459B - Weight control method for electrophoretic deposition ceramic green body - Google Patents
Weight control method for electrophoretic deposition ceramic green body Download PDFInfo
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- CN104589459B CN104589459B CN201510002968.2A CN201510002968A CN104589459B CN 104589459 B CN104589459 B CN 104589459B CN 201510002968 A CN201510002968 A CN 201510002968A CN 104589459 B CN104589459 B CN 104589459B
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- ceramic green
- electrophoretic deposition
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- 239000000919 ceramic Substances 0.000 title claims abstract description 76
- 238000001652 electrophoretic deposition Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004260 weight control Methods 0.000 title claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 98
- 238000001962 electrophoresis Methods 0.000 claims abstract description 45
- 230000008569 process Effects 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 12
- 238000005303 weighing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000151 deposition Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021392 nanocarbon Inorganic materials 0.000 description 1
- MTZWHHIREPJPTG-UHFFFAOYSA-N phorone Chemical compound CC(C)=CC(=O)C=C(C)C MTZWHHIREPJPTG-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
Abstract
The invention discloses a weight control method for an electrophoretic deposition ceramic green body. The method comprises the following steps: conveying all slurry in an electrophoresis tank to a slurry tank; weighing the slurry in the slurry tank; putting a tray mold into the electrophoresis tank; weighing the tray mold; conveying the slurry in the slurry tank to the electrophoresis tank till the mold is submerged in the slurry in the electrophoresis tank; weighing the buoyant weight of the tray mold; setting the target weight of the ceramic green body in a control system; inputting the weights into the control system; calculating the buoyant weight of the ceramic green body; when the buoyant weight of the ceramic green body measured by the control system is up to a target value, stopping a working power supply through the control system; ending electrophoretic deposition of the ceramic green body of a target weight. By adopting the method, the problem of difficulty in controlling the weight of the electrophoretic deposition ceramic green body is solved effectively. An adopted device is simple, small in investment and programmable in operation and control, and is very suitable for batch automatic production of electrophoretic deposition ceramic products.
Description
Technical field
The present invention relates to ceramic electrophoresis deposition modeling technical field, more particularly to a kind of weight of electrophoretic deposition ceramic green
Amount control method.
Background technology
Electrophoretic deposition is key areas of ceramic forming technique, and it has, and equipment is simple, shaping speed is fast and can advise
The advantages of modelling produces.The principle of electrophoretic deposition pottery is: is suspended in powered ceramic particle or the colloid of liquid flux, in electric field
In the presence of move to the electrode surface of oppositely charged and form sedimentary.With traditional molding and equal pressing forming technology phase
Electrophoretic deposition can avoid the problem aligning because of the lower ceramic crystalline grain of pressure effect to ratio, thus avoiding the physics of ceramic
The anisotropy of chemical property, this is particularly important for requiring the consistent advanced function pottery of physical and chemical performance.Just because
For the original advantage of electrophoretic deposition pottery molding aspect, electrophoretic deposition has obtained extensively should in terms of advanced function ceramics preparation
With.
One difficult problem of restriction electrophoretic deposition pottery scale application is the Weight control of ceramic green, and its reason is:
In electrophoretic deposition process, the ceramic particle due to suspending in slurry deposits in electrode surface, and the density of slurry reduces continuous, with
When slurry total amount also reduce, this makes only simply directly to weigh to judge that the actual weight error of ceramic green is very big.
Especially require the high occasion of ceramic dimensional accuracy, this problem will result directly in the generation of a lot of waste products, cause resource wave
Take and cost increases.If to solve this problem by introducing the equipment such as online thickness measuring of x-ray, can bring again equipment complicated,
Invest big trouble.Chinese patent application cn102169102a discloses nano-carbon material electrophoretic deposition liquid concentration monitor and analysis
Method, this invention to be monitored for analysis means with electrical conductivity method and infrared spectrum and to deposit liquid intermediate ion carrier with analytical electrophoresises and receive
The concentration change of rice material with carbon element.But the apparatus expensive that the physical-chemical structure that this invention adopts is complicated, adopted, external interference because
Element is big, and cannot judge the change of electrophoretic deposition liquid total amount, therefore is not suitable for being transplanted to the Weight control of electrophoretic deposition ceramic green
Field.By the weighing process of sequencing, obtain the instant change information of slurry weight (the i.e. change of slurry density or initial weight
Change), report is had no with the accurate method controlling ceramic green in electrophoretic deposition process.
Content of the invention
The present invention is intended to provide a kind of weight control method of electrophoretic deposition ceramic green, using less and simple work
Tool equipment and the operational approach of sequencing, solve to lead to ceramic green weight to be difficult to because slurry changes in electrophoretic deposition process
The problem controlling, thus ensure to obtain the consistent ceramic green product of target weight in continuous electrophoresis depositing operation.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of weight control method of electrophoretic deposition ceramic green it is characterised in that: comprise the steps:
(1) slurry of electrophoresis tank is all delivered to slurry tank, and weighs the weight of slurry in slurry tank, be designated as；
(2) tray die is put into electrophoresis tank, weigh tray die weight, be designated as；
(3) slurry of slurry tank is conveyed to electrophoresis tank, until the slurry submergence mould in electrophoresis tank, weigh tray die
Buoyant weight, be designated as；
(4) set in the controls ceramic green weight desired value as, will be above-mentioned、、AndInput control
The buoyant weight of ceramic green in system processed, is then calculated using following formula:
, wherein: in formulaFor the density of ceramic green,
Under the conditions of same electrophoretic deposition process, the density of gained ceramic greenFor definite value；Soaked by slurry by mould in tray die
Volume not, this value of the mould of same model is definite value；
(5) tray die, electrophoresis tank are connected with the positive and negative electrode of working power, and operation control system starts working power and opens
Begin to carry out electrophoretic deposition, when the buoyant weight that operation control system records ceramic green isWhen, control system quits work power supply, mesh
The ceramic green electrophoretic deposition of indicated weight amount terminates.
Described weightCan be claimed by weight sensor, or will be upper by control system from second electrophoretic deposition
OnceWith lastSubtraction calculations and obtain；Described、All claimed by weight sensor；Described pottery
The buoyant weight of green compact is claimed by weight sensor.
Slurry between described electrophoresis tank and slurry tank is conveyed by two-way pump.
After described ceramic green electrophoretic deposition terminates, change tray die, repeating above-mentioned (1) to (5) process can be continuous
Prepare ceramic green.
The invention has the advantages that
1st, the weight control method of the electrophoretic deposition ceramic green of the present invention, solves electrophoretic deposition ceramic green weight difficult
With the problem controlling, using instant change information (the i.e. change of slurry density or the first starting weight of the slurry in electrophoretic deposition process
The change of amount), and set the target weight of ceramic green, and calculated the buoyant weight of ceramic green by control system, using pottery
Controlling technological process, its method program is simple, enforceability is strong, control effect is good, just for the buoyant weight of porcelain green compact and tray die
In being programmed controlling, therefore very convenient integrated in automated productin line.
2nd, in the present invention, each gravimetric value adopts weight sensor to measure, and hands over and by timely for data input control system, obtains
Data is quick, and convenient and control system carries out data exchange, and measures accurately, improves the precision of the weight of ceramic green.
3rd, in the present invention, the slurry between electrophoresis tank and slurry tank is conveyed by two-way pump, and slurry is in electrophoresis tank and slurry
Transmitted by two-way pump both direction between tank, improve work efficiency, convenient control.
Brief description
Fig. 1 is the structural representation of electrophoretic deposition ceramic green device of the present invention.
In figure labelling: 1 is tray die, 2 is pallet weight sensor, and 3 is electrophoresis tank, and 4 is slurry, and 5 is ceramic green,
6 is delivery pipe, and 7 is two-way pump, and 8 is slurry tank, and 9 is slurry tank weight sensor, and 10 is slurry vortex mixer, and 11 is return duct,
12 is digital instrument, and 13 is control system and working power.
Specific embodiment
With reference to specific embodiment, the present invention is further elaborated, but the present invention is not limited to following examples, institute
Method of stating is conventional method if no special instructions, and described material all can obtain from open commercial sources if no special instructions.
Embodiment 1
Below in conjunction with the accompanying drawing 1 of the present invention, further describe the Weight control of the electrophoretic deposition ceramic green that invention provides
Method, its concrete steps and principle are described below:
(1) first turn on two-way pump 7 to invert, the slurry in electrophoresis tank 3 is drawn back slurry tank, the slurry in electrophoresis tank 3
Material all exhausts, and weighs the weight of slurry in slurry tank(do not comprise the quality of slurry tank, gross weight deducts slurry tank tare weight and obtains
Arrive).
(2) tray die 1 is put into electrophoresis tank 3, weigh the weight of tray die 1(tray die, be by pallet with
Mould is formed by connecting, and ceramic green is deposited on mould, and pallet is easy to weigh for fixing mould).
(3) open two-way pump 7 to rotate forward, convey slurry to electrophoresis tank, until slurry is flowed back to slurry tank from electrophoresis tank top
When, and weigh the buoyant weight of tray die 1(buoyant weight refers to that its own weight deducts the weight of institute's venting slurry), thus can obtain
Density before the deposition of slurry:
(1)
Wherein,For mould in tray die by the volume of slurry institute submergence, mould is totally submerged in the slurry, for same
This value of the tray die of one model is definite value, and this value also can record (such as drainage or by dimensional measurement by conventional method
Calculate), and be input in control system program as parameter.In conjunction with (1) formula, easily try to achieve the deposition front volume of slurry:
(2)
(4) operation digital instrument is removed the peel to tray die it is therefore an objective to be measured ceramic green in electrophoretic deposition process
Buoyant weight (note: this value forOn the basis of incrementss, actually include itself buoyant weight of ceramic green and because of slurry density
Reduce the incrementss of tray die buoyant weight causing, be referred to as the buoyant weight of ceramic green herein).Set pottery in the controls
Porcelain green compact weight desired value(in production technology, needing the weight of the ceramic green of deposition on mould), by control program
Calculate the buoyant weight of ceramic green.It is easy to get following formula according to Archimedes' principle:
(3)
Wherein,The density of slurry when carrying out for electrophoretic deposition,For the volume of ceramic green,Can be asked by following formula
:
(4)
Through it is demonstrated experimentally that for determine slurry system, under the conditions of same electrophoretic deposition process, gained ceramic green
DensityFor definite value, (this value also can be recorded by conventional method, such as drainage, and is input to control system journey as parameter
In sequence), can try to achieve:
(5)
Comprehensive (2) to (5) formula, can getWithRelation be:
(6)
In formula,Setup parameter as control system program；、WithRespectively according to above-mentioned (one) to (three) step
Suddenly obtained by digital instrument；WithActual according to conventional methods measurement in advance, and the input ginseng as control system program
Number；And calculate；
(5) operation control system controls working power energising, proceeds by electrophoretic deposition, when the buoyant weight of ceramic green reaches
To its desired valueWhen, control system controls working power power-off, is automatically stopped electrophoretic deposition, or alarm takes manual behaviour
Stop electrophoretic deposition as mode；
(6), after this ceramic green deposition finishes, change tray die, repeat above-mentioned (one) and can continuously make to (five) process
Standby ceramic green, so can ensure that the ceramic green of each electrophoretic deposition all meets target weight.In addition, sinking from second electrophoresis
Amass,Also can will be last by control systemWith lastSubtraction calculations and obtain.
The present invention efficiently solves because in electrophoretic deposition process, slurry total amount and density change and leads to ceramic green
The unmanageable problem of weight, and the device adopting is simple, put into little, method of controlling operation thereof programmable, is highly suitable for
Electrophoretic deposition ceramic batch automatic production.
Carry out the device of electrophoretic deposition ceramic green using above-mentioned weight control method, including tray die 1, pallet weight
Sensor 2, electrophoresis tank 3, delivery pipe 6, two-way pump 7, slurry tank 8, slurry tank weight sensor 9, slurry vortex mixer 10, return duct
11st, digital instrument 12(weight display or data acquisition unit) and control system and working power 13.Tray die 1 includes pallet
With mould, ceramic green 5 is deposited on mould, and pallet is easy to, for fixing mould, (note: pallet can be using routine with mould of weighing
Method is fixed, such as threaded, welding etc.)；Pallet weight sensor 2 is used for tray die 1 is weighed, slurry tank weight
Quantity sensor 9 is used for slurry tank 8 is weighed；The bottom of delivery pipe 6, two-way pump 7 and slurry tank 8 is passed through in the bottom of electrophoresis tank 3
Portion connects, and return duct 11 one end is connected with the leakage fluid dram at electrophoresis tank 3 top, and the other end is connected with the liquid inlet at slurry tank 8 top.
The volume of slurry tank 8 is more than the volume of electrophoresis tank 3, so that slurry tank accommodates than slurries more in electrophoresis tank；Slurry
The height of the liquid inlet at batch can 8 top is less than the height of the leakage fluid dram at electrophoresis tank 3 top, is easy to slurry 4 and flows back；Slurry vortex mixer
10 are installed on slurry tank 8, for the slurry 4 in stirring and evenly mixing slurry tank 8, to eliminate the density contrast within slurry.
Control system and working power 13 contain the man machine interface of control system, working power and correlation, and it controls system
System (note: control system can adopt classical control system, such as plc control system, dcs control system or host computer etc.) and numeral
Instrument 12 mutually communicates；Positive and negative the two poles of the earth of its working power connect anode (tray die) and the moon of electrophoretic deposition set respectively
Pole (electrophoresis tank).
Slurry vortex mixer 10 is agitator or ultrasonic vibrator, or the two combination.
Ceramic suspension granule in slurry 4 is negatively charged, migrates to anode, be deposited on die surface and formed under electric field action
Ceramic green 5.Slurry in electrophoresis tank is provided by slurry tank, and when two-way pump rotates forward, slurry conveys to electrophoresis tank, is in
The slurry at electrophoresis tank top is back to slurry tank by pipeline；When two-way pump inverts, slurry can all be drawn back by the slurry of electrophoresis tank
Batch can.
Positive and negative the two poles of the earth of control system and working power connect the anode (tray die) of two electrophoretic deposition set respectively
With negative electrode (electrophoresis tank).Ceramic suspension granule in slurry 4 is negatively charged, migrates to anode, be deposited on mould under electric field action
Surface formed ceramic green 5(special instruction: according to be ceramic suspension granule positively charged slurry, then should be by tray die
It is connected with working power negative pole and as negative electrode, electrophoresis tank is connected with working power positive pole and as anode).In electrophoresis tank
Slurry is provided by slurry tank, and when two-way pump rotates forward, slurry conveys to electrophoresis tank, and the slurry being in electrophoresis tank top passes through
Pipeline is back to slurry tank；When two-way pump inverts, slurry tank can all be drawn back by the slurry of electrophoresis tank.Pallet weight sensor and
Slurry tank weight sensor is all connected with digital instrument, and digital instrument is connected with control system.
Claims (4)
1. a kind of weight control method of electrophoretic deposition ceramic green it is characterised in that: comprise the steps:
(1) slurry of electrophoresis tank is all delivered to slurry tank, and weighs the weight of slurry in slurry tank, be designated as；
(2) tray die is put into electrophoresis tank, weigh tray die weight, be designated as；
(3) slurry of slurry tank is conveyed to electrophoresis tank, until the slurry submergence mould in electrophoresis tank, weigh the floating of tray die
Weight, is designated as；
(4) set in the controls ceramic green weight desired value as, will be above-mentioned、、AndInput controls system
The buoyant weight of ceramic green in system, is then calculated using following formula:
, wherein: in formulaFor the density of ceramic green, same
Under the conditions of electrophoretic deposition process, the density of gained ceramic greenFor definite value；For mould in tray die by the submergence of slurry institute
Volume, this value of the mould of same model is definite value；
(5) tray die, electrophoresis tank are connected with the positive and negative electrode of working power respectively, and operation control system starts working power and opens
Begin to carry out electrophoretic deposition, when the buoyant weight that operation control system records ceramic green isWhen, control system quits work power supply, mesh
The ceramic green electrophoretic deposition of indicated weight amount terminates.
2. a kind of electrophoretic deposition ceramic green according to claim 1 weight control method it is characterised in that:
Described weightCan be claimed by weight sensor, or from second electrophoretic deposition by control system by the last time
'sWith lastSubtraction calculations and obtain；Described、All claimed by weight sensor；Described ceramic green
Buoyant weight claimed by weight sensor.
3. a kind of electrophoretic deposition ceramic green according to claim 1 weight control method it is characterised in that:
Slurry between described electrophoresis tank and slurry tank is conveyed by two-way pump.
4. a kind of electrophoretic deposition ceramic green according to claim 1 weight control method it is characterised in that:
After described ceramic green electrophoretic deposition terminates, change tray die, repeat above-mentioned (1) to (5) process and can continuously prepare
Ceramic green.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002968.2A CN104589459B (en) | 2015-01-05 | 2015-01-05 | Weight control method for electrophoretic deposition ceramic green body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002968.2A CN104589459B (en) | 2015-01-05 | 2015-01-05 | Weight control method for electrophoretic deposition ceramic green body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104589459A CN104589459A (en) | 2015-05-06 |
| CN104589459B true CN104589459B (en) | 2017-02-01 |
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|---|---|---|---|
| CN201510002968.2A Active CN104589459B (en) | 2015-01-05 | 2015-01-05 | Weight control method for electrophoretic deposition ceramic green body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298674C (en) * | 2005-04-06 | 2007-02-07 | 清华大学 | Method for preparing piezoelectric ceramic film |
| CN101376974A (en) * | 2007-08-28 | 2009-03-04 | 汉达精密电子(昆山)有限公司 | Vacuum sputtering EMI film and electrophoresis combined coating technology for processing micro-arc oxidation workpiece |
| JP5606211B2 (en) * | 2010-08-09 | 2014-10-15 | 株式会社シミズ | Resin composition for electrodeposition paint, water-based electrodeposition paint, coating method and coated article |
| CN102169102B (en) * | 2011-01-13 | 2014-10-01 | 福州大学 | Method for monitoring and analyzing concentration of nano-carbon material electrophoretic deposition liquid |
| CN103484917B (en) * | 2013-09-22 | 2016-01-13 | 内蒙古工业大学 | A kind of preparation method of zirconium hydride surface hydrogen resistance coating |
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