CN114609877B - Ceramic laser printing system based on magnetic acting force - Google Patents
Ceramic laser printing system based on magnetic acting force Download PDFInfo
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- CN114609877B CN114609877B CN202210147173.0A CN202210147173A CN114609877B CN 114609877 B CN114609877 B CN 114609877B CN 202210147173 A CN202210147173 A CN 202210147173A CN 114609877 B CN114609877 B CN 114609877B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 108
- 238000007648 laser printing Methods 0.000 title claims abstract description 26
- 239000000049 pigment Substances 0.000 claims abstract description 90
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- 230000005484 gravity Effects 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 28
- 239000010410 layer Substances 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 15
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000000696 magnetic material Substances 0.000 claims description 13
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- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
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- 238000001354 calcination Methods 0.000 claims description 6
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- WRAGBEWQGHCDDU-UHFFFAOYSA-M C([O-])([O-])=O.[NH4+].[Zr+] Chemical compound C([O-])([O-])=O.[NH4+].[Zr+] WRAGBEWQGHCDDU-UHFFFAOYSA-M 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229910000828 alnico Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000969 carrier Substances 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 229910006501 ZrSiO Inorganic materials 0.000 claims description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 2
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 2
- XPBBUZJBQWWFFJ-UHFFFAOYSA-N fluorosilane Chemical compound [SiH3]F XPBBUZJBQWWFFJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
- 238000005554 pickling Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
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- 239000002344 surface layer Substances 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- WBWJXRJARNTNBL-UHFFFAOYSA-N [Fe].[Cr].[Co] Chemical compound [Fe].[Cr].[Co] WBWJXRJARNTNBL-UHFFFAOYSA-N 0.000 claims 1
- 238000007639 printing Methods 0.000 abstract description 17
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- 238000009826 distribution Methods 0.000 abstract description 3
- 108091008695 photoreceptors Proteins 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005245 sintering Methods 0.000 description 5
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- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
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- 239000006247 magnetic powder Substances 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
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Images
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
- G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a ceramic laser printing system based on magnetic acting force, which comprises a copying system, a developing system, a transferring system and a fixing system, wherein the copying system is used for copying the ceramic laser printing system; the copying system comprises a shooting system and a circuit control system; the developing system comprises a magnetic round roller, a magnetic ceramic pigment bin, a conveyor belt, an inductance coil and a waste bin which are linearly arranged; the transfer system comprises a transportation system and a permanent magnet flat plate; the fixing system comprises a carrier conveying system and a heating system. The invention changes the existing ceramic laser printing still relies on the electrostatic adsorption action principle, proposes a scheme of taking magnetic acting force as printing consumable migration force, and controls an inductance coil to generate magnetic strength consistent with a pattern to be printed through a circuit control system, so that the distribution of magnetic ceramic pigment is consistent with the pattern, and the problems of low pattern concentration and precision and the like caused by unsmooth substance migration due to small electrostatic action and large ceramic pigment gravity are effectively solved.
Description
Technical Field
The invention relates to the technical field of ceramic laser printing, in particular to a ceramic laser printing system based on magnetic acting force by taking magnetic ceramic pigment as printing consumable.
Background
Xerography was invented by the company of Schlemen (ChesterFloyd Carlson) in 1938, U.S. and based on this principle, the company of Schlem (Xerox) in 1960, which has sold the first laser printer Xerox914. The principle of the laser printer mainly comprises: (1) The photoreceptor is charged with negative electrons by corona discharge principle. (2) When the photoreceptor is irradiated with laser light by exposure, negative electrons on the photoreceptor disappear wherever they are irradiated, and an electrostatic image (negatively charged) of the original shape to be printed remains. (3) The development is carried out by delivering positively charged toner onto the photoreceptor by the developer. Since the toner is positively charged, the positively charged toner is attracted to the photoreceptor at the place (negatively charged) of the electrostatic original image formed after the exposure, and at this time, the original image (positively charged) of the toner is formed. (4) The transfer process is to transfer the toner original image formed on the upper photoreceptor to a printing sheet. The printing paper is primarily negatively charged and then the positively charged toner original image is attracted to the printing paper. At this time, the toner on the printing paper is only adsorbed on the paper by static electricity, and in the case of a black-and-white printer, only black toner is seen, and in the case of a color 67 printer, four kinds of toner Yellow, magenta, cyan, black are stacked on the paper. (5) Fixing, melting the toner by heating, and then pressing the toner onto paper (fiber) with pressing pressure. (6) Cleaning, namely cleaning the toner and static electricity remained on the photoreceptor.
The carbon powder used for common laser printing has the diameter of 5-10 mu m, the shape is close to a sphere, and the acting force among particles is weak, so the carbon powder has good solid state fluidity. The carbon powder has low density and good conductivity, and even if the carbon powder has large particle size, the powder transfer can still be realized by utilizing static electricity. However, the density of the ceramic pigment is far greater than that of carbon powder, and if the ceramic pigment is effectively adsorbed under the same electrostatic strength condition, the particle size of the pigment needs to be reduced to the nanometer size or the electrostatic strength is improved by 5-10 times. If the particle size of the ceramic pigment is in the nanometer scale, on one hand, the preparation cost is higher, on the other hand, the color of the nano ceramic pigment is inconsistent with that of the macroscopic ceramic pigment with the same composition, and the nano ceramic pigment is easy to melt in the glaze in actual use. Meanwhile, it is difficult to improve the charge strength of the ceramic pigment because of the poor conductivity. At present, the ceramic laser printing still utilizes the action principle of electrostatic adsorption in the prior art, and the used ceramic laser printing consumable generally adopts the substances such as resin, wax and the like to cover the surface of ceramic pigment so as to realize the solidification of the ceramic pigment, and adds charge regulators such as quaternary ammonium salt and the like to change the surface charge of powder, so that the surface is coated with hydrophobic nano SiO 2 To solve the problem of hydrophobicity. Thus, the organic matters of the printing consumable material are added in an amount exceeding 70 percent, so that the particle size of the printing consumable material is equal to that of the printing consumable materialThe 1 μm surge is 7 to 20 μm, which necessarily reduces the feeding smoothness of ceramic laser printing and the printing accuracy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a ceramic laser printing system based on magnetic acting force, wherein the magnetic acting force is used as printing consumable migration force, and an inductance coil is controlled by a circuit control system to generate magnetic strength consistent with a pattern to be printed, so that the distribution of magnetic ceramic pigment is consistent with the pattern, and the problems of low pattern concentration and precision and the like caused by unsmooth substance migration due to small electrostatic action and large ceramic pigment gravity are effectively solved.
The aim of the invention is realized by the following technical scheme:
the invention provides a ceramic laser printing system based on magnetic acting force, which comprises a copying system, a developing system, a transferring system and a fixing system, wherein the copying system is used for copying the ceramic laser printing system; the copying system comprises a shooting system and a circuit control system; the developing system comprises a magnetic round roller, a magnetic ceramic pigment bin, a conveyor belt, an inductance coil and a waste bin which are linearly arranged; the transfer system comprises a transportation system and a permanent magnet flat plate; the fixing system comprises a carrier conveying system and a heating system; wherein, the liquid crystal display device comprises a liquid crystal display device,
the shooting system is used for generating a light source to irradiate the to-be-printed pattern to form a voltage signal which is color-separated and provided with bitmap information;
the circuit control system is used for receiving the voltage signal formed by the shooting system and is connected with the control inductance coil;
the magnetic round roller is used for generating adsorption force on the magnetic pigment;
the magnetic ceramic pigment bin is used for storing magnetic ceramic pigment, and the outlet of the magnetic ceramic pigment bin corresponds to the bottom position of the magnetic round roller;
the conveying belt is used for bearing and transferring the magnetic ceramic pigment, is driven by the conveying system to operate and convey, and is attached to the bottom of the magnetic round roller;
the inductance coil is positioned below the bottom of the magnetic round roller and is used for forming a magnetic field opposite to the magnetic round roller, and the strength of the magnetic field is controlled by a circuit control system through a voltage signal;
the waste bin is used for containing magnetic ceramic pigment which loses the magnetic attraction effect due to the magnetic field offset caused by the inductance coil and falls down from the conveyor belt due to the gravity effect;
the conveying system is used for driving the conveying belt to run and convey, so that the magnetic ceramic pigment sequentially migrates from the bottom of the magnetic round roller through the permanent magnet flat plate and the heating system;
the permanent magnet flat plate is larger than the area of the pattern to be printed and is used for adsorbing the magnetic ceramic pigment on the conveyor belt, which corresponds to the pattern to be printed;
the carrier transportation system is used for driving the carrier to operate, and the operation speed of the carrier transportation system is the same as the transmission speed of the conveyor belt; the carrier is positioned below the heating system and is used for carrying the magnetic ceramic pigment which leaves the permanent magnet flat plate to lose the magnetic attraction effect and falls from the conveyor belt under the action of gravity;
the heating system is used for heating the magnetic ceramic pigment on the carrier to enable the magnetic ceramic pigment to adhere to the carrier.
In the scheme, the magnetic ceramic pigment has a wrapping structure of at least three layers, namely soft magnetic material particles are used as an inner core, a middle layer is used as a protective cosmetic layer, and an outer layer is ceramic pigment. The inner core radius, the thickness of the protective cosmetic layer and the thickness of the outer ceramic pigment are 1:0.01-2:2-6. According to practical needs, the water repellent finishing layer can also comprise a surface layer
Further, the soft magnetic material is Fe 3 O 4 Ferrite (manganese zinc, nickel zinc), alnico (cast sintering), ferrochrome cobalt (sintering), neodymium iron boron (sintering, bonding), samarium cobalt (sintering, bonding), aliron carbon (sintering), the grain size of which is 0.5-3 μm. The protective cosmetic layer is ZrSiO 4 、ZrO 2 、TiO 2 、Al 2 O 3 、SiO 2 。
In the scheme, the preparation method of the magnetic ceramic pigment comprises the following steps of:
(1) Preparation of coated core powder
Preparing the protective cosmetic layer on the surfaces of the soft magnetic material particles by adopting a sol-gel method, a homogeneous precipitation method or an in-situ decomposition method to obtain wrapped core powder;
(2) Preparation of the Primary product
Ball-milling and mixing the wrapped core powder with ceramic pigment powder or frit, and calcining at 700-1300 ℃ to obtain a primary product which is a block material;
(3) Preparation of magnetic ceramic pigment
Ball-milling and crushing the block material, separating by a magnet, pickling, screening by the magnet, and drying to obtain the magnetic ceramic pigment; or further mixing with ethanol solution of fluorosilane, and drying to obtain the magnetic ceramic pigment with the surface hydrophobic modification layer.
Further, in the step (1) of the preparation method of the magnetic ceramic pigment, an in-situ decomposition method is adopted, soft magnetic material particles are added into an ammonium zirconium carbonate aqueous solution with the concentration of 10-40% to form a stable suspension, wherein the dosage of the soft magnetic material particles is 10-50wt% of the ammonium zirconium carbonate aqueous solution; heating the suspension by a microwave oven to form a zirconia layer on the surfaces of the soft magnetic material particles; drying the suspension after microwave treatment, and calcining at 500-900 ℃ for 1-3 hours to obtain the inner core powder coated with the zirconia layer.
The invention has the following beneficial effects:
(1) The invention changes the existing ceramic laser printing still relies on the electrostatic adsorption action principle, and proposes a scheme of taking magnetic acting force as printing consumable migration force.
(2) The permanent magnetic round roller with high magnetic field strength is utilized to adsorb the magnetic ceramic pigment, so that the pigment can be fully adsorbed, and even the ceramic pigment with larger particle size or higher density can be fully adsorbed, thereby ensuring the concentration of patterns.
(3) The voltage signal with bitmap information is converted by the copying system, and the inductance coil is controlled to generate magnetic strength consistent with the pattern to be printed, so that the distribution of the magnetic ceramic pigment is consistent with the pattern, the process is simple, the control is easy, and the pattern resolution can be ensured.
(4) The fixing system can realize non-contact printing of patterns by utilizing the combined action of magnetic action and the gravity of the ceramic pigment, and can obtain better printing effect than that of ink-jet printing.
Drawings
The invention will be described in further detail with reference to examples and figures:
fig. 1 is a schematic diagram of a ceramic laser printing system according to an embodiment of the present invention.
In the figure: a copying system 1, a pattern to be printed 1-1, a photographing system 1-2, a voltage signal 1-2a (not shown in the figure), a circuit control system 1-3, a developing system 2, a magnetic round roller 2-1, a magnetic ceramic pigment bin 2-2, a conveyor belt 2-3, an inductance coil 2-4, a waste bin 2-5, a transferring system 3, a conveying system 3-1, a permanent magnet flat plate 3-2, a fixing system 4, a carrier conveying system 4-1, a heating system 4-2
Detailed Description
Fig. 1 shows an embodiment of a ceramic laser printing system based on magnetic force, which comprises a copying system 1, a developing system 2, a transferring system 3 and a fixing system 4.
The copying system 1 comprises a shooting system 1-2 and a circuit control system 1-3; the developing system 2 comprises a magnetic round roller 2-1, a magnetic ceramic pigment bin 2-2, a conveyor belt 2-3, an inductance coil 2-4 and a waste bin 2-5 which are linearly arranged; the transfer system 3 comprises a transportation system 3-1 and a permanent magnet flat plate 3-2; the fixing system 4 comprises a carrier conveying system 4-1 and a heating system 4-2; wherein, the liquid crystal display device comprises a liquid crystal display device,
the shooting system 1-2 adopts a camera tube and is used for generating a light source to irradiate the to-be-printed pattern 1-1 to form a voltage signal 1-2a with color separation and bitmap information;
the circuit control system 1-3 is used for receiving a voltage signal 1-2a formed by the shooting system 1-2 and is connected with the control induction coil 2-4;
a magnetic round roller 2-1 for generating an adsorption force to the magnetic ceramic pigment;
a magnetic ceramic pigment bin 2-2 for storing a magnetic ceramic pigment, the outlet of which corresponds to the bottom position of the magnetic round roller 2-1;
the conveying belt 2-3 is used for bearing and transferring the magnetic ceramic pigment, is driven by the conveying system 3-1 to operate and convey, and is attached to the bottom of the magnetic round roller 2-1;
the inductance coil 2-4 is positioned below the bottom of the magnetic round roller 2-1 and is used for forming a magnetic field opposite to the magnetic round roller 2-1, and the strength of the magnetic field is controlled by the circuit control system 1-3 through the voltage signal 1-2a;
the waste bin 2-5 is used for containing the magnetic ceramic pigment which loses the magnetic attraction effect due to the magnetic field offset caused by the inductance coil 2-4 and falls from the conveyor belt 2-3 due to the gravity effect;
the conveying system 3-1 is used for driving the conveying belt 2-3 to run and convey, so that the magnetic ceramic pigment is sequentially transferred from the bottom of the magnetic round roller 2-1 through the permanent magnet flat plate 3-2 and the heating system 4-2 by the conveying belt 2-3;
the permanent magnet flat plate 3-2 is larger than the area of the to-be-printed pattern 1-1 and is used for adsorbing the magnetic ceramic pigment corresponding to the to-be-printed pattern 1-1 on the conveyor belt 2-3;
the carrier conveying system 4-1 is used for driving the carriers to operate, and the operation speed of the carrier conveying system is the same as the transmission speed of the conveying belt 2-3; the carrier is positioned below the heating system 4-2 and is used for carrying the magnetic ceramic pigment which leaves the permanent magnet flat plate 3-2 to lose the magnetic attraction effect and falls from the conveyor belt 2-3 due to the gravity effect;
a heating system 4-2 for heating the magnetic ceramic pigment on the carrier to adhere to the carrier.
The working principle of the embodiment is as follows:
the magnetic ceramic pigment powder covered with the ceramic pigment is used as printing material. For the pattern to be printed 1-1, shooting is performed using the shooting system 1-2, and when the light source illuminates the pattern, the pattern to be printed 1-1 can be converted into a voltage signal 1-2a having color separation and bitmap information.
Magnetic round roller 2-1 is made of magnetic Fe 3 O 4 For nuclear, printing consumables are discharged from the outlet of the magnetic ceramic pigment bin 2-2 and uniformly adsorbed on the magnetic round shapeThe conveyor belt 2-3 (conveyor belt is thin, soft, with little stretch deformation) at the bottom of the roller 2-1. When the conveyor belt 2-3 with the magnetic ceramic pigment adsorbed thereon migrates to the bottommost part of the magnetic round roller 2-1, the control coil 2-4 forms a magnetic field opposite to the magnetic round roller 2-1, and the voltage signal 1-2a controls the inductance coil 2-4 through the circuit control system 1-3 to form a magnetic field with strength corresponding to the pattern according to the position change, so that the magnetic ceramic pigment corresponding to the blank part in the pattern loses the magnetic attraction effect due to the magnetic field cancellation and falls down from the conveyor belt 2-3 to the waste bin 2-5 due to the gravity effect.
The formed adsorption pigment powder corresponding to the pattern 1-1 to be printed is continuously migrated to the position of the permanent magnet flat plate 3-1 which is larger than the pattern area on the conveyor belt 2-3, and the magnetic adsorption force of the permanent magnet flat plate 3-1 is utilized to ensure that pattern deformation and magnetic ceramic pigment falling off can not occur in the conveying process. Meanwhile, the carrier transport system drives the carriers to operate, and the operation speed is the same as the transport speed of the pattern-carried adsorbing pigment powder transport belt 2-3. After the pattern adsorption pigment powder on the conveyor belt 2-3 leaves the permanent magnet flat plate 3-1, the magnetic attraction effect is lost, the pattern adsorption pigment powder falls onto the surface of the carrier from the conveyor belt 2-3 under the action of gravity, and then the pattern adsorption pigment powder is heated by the heating system 4-2, so that the wax-like substance on the surface of the magnetic ceramic pigment is melted and bonded. The product with the magnetic ceramic powder pattern covered on the surface of the carrier is calcined for 20 minutes at 1100 ℃ to form the product with the laser printing ceramic pattern.
Embodiment two:
the first difference between this embodiment and the second embodiment is that: the photographing system 1-2 uses a color photographing system to photograph, decompose a color pattern into red, green and blue element colors, respectively correspond to magenta, yellow and blue of the ceramic pigment, and correspond to brightness of the color photographing pattern to black ceramic pigment, thus forming a GMYK system of a printing system, and obtaining color laser ceramic printing.
The preparation method of the magnetic ceramic pigment in the embodiment of the invention comprises the following steps:
(1) Preparation of coated core powder
Weigh 5g of average particle sizeFe of 0.5 μm 3 O 4 Soft magnetic material particles, 0.5g of 10wt% PEG solution and 25g of water are added, put into a 500mL beaker, and strongly stirred for 1h to form stable suspension; then 25g of 27.48wt% ammonium zirconium carbonate solution is added, stirring is continued for 1h, a household microwave oven is used for heating for 18 times in a medium fire mode, 10s each time, and then the suspension after microwave treatment is put into a 60 ℃ oven for drying to obtain powder; transferring the powder into an alumina crucible, and transferring into N at 900 DEG C 2 Calcining under atmosphere protection, maintaining the temperature for 2h, cooling to room temperature, and grinding to obtain Fe coated with compact zirconia layer (thickness of 7 nm) 3 O 4 Powder;
(2) Preparation of the Primary product
Taking 2.5g of Fe coated with compact zirconia 3 O 4 Mixing powder with 50g of red frit glaze (ball-milled in advance to an average particle size of 2 mu m) by adopting a ball mill, performing dry ball milling for 51min, filling into a crucible, calcining at 1250 ℃, and preserving heat for 1h, wherein the obtained primary product is a block material;
(3) Preparation of magnetic ceramic pigment
Wet ball milling the block material for 2 hours until the granularity is 2 mu M to obtain suspension, inserting a strong magnet into the suspension, taking out, and then placing the adsorbed magnetic powder into 0.1M HCl for 1 hour to remove the powder with the broken zirconia layer caused by ball milling and crushing; then, the strong magnet is used for sucking the powder again, distilled water is used for cleaning the powder on the surface of the magnet to be neutral, and the powder is placed in a blast drying box for drying, so that the magnetic ceramic pigment is obtained.
Claims (8)
1. A ceramic laser printing system based on magnetic force, characterized in that: comprises a copying system (1), a developing system (2), a transferring system (3) and a fixing system (4); the copying system (1) comprises a shooting system (1-2) and a circuit control system (1-3); the developing system (2) comprises a magnetic round roller (2-1), a magnetic ceramic pigment bin (2-2), a conveyor belt (2-3), an inductance coil (2-4) and a waste bin (2-5), wherein the inductance coil is linearly arranged; the transfer system (3) comprises a transportation system (3-1) and a permanent magnet flat plate (3-2); the fixing system (4) comprises a carrier conveying system (4-1) and a heating system (4-2); wherein, the liquid crystal display device comprises a liquid crystal display device,
the shooting system (1-2) is used for generating a light source to irradiate the to-be-printed pattern (1-1) to form a voltage signal (1-2 a) which is color-separated and has bitmap information;
the circuit control system (1-3) is used for receiving a voltage signal (1-2 a) formed by the shooting system (1-2) and is connected with the control inductance coil (2-4);
the magnetic round roller (2-1) is used for generating adsorption force on the magnetic pigment;
the magnetic ceramic pigment bin (2-2) is used for storing magnetic ceramic pigment, and the outlet of the magnetic ceramic pigment bin corresponds to the bottom position of the magnetic round roller (2-1);
the conveying belt (2-3) is used for bearing and transferring the magnetic ceramic pigment, is driven by the conveying system (3-1) to operate and convey, and is attached to the bottom of the magnetic round roller (2-1);
the inductance coil (2-4) is positioned below the bottom of the magnetic round roller (2-1) and is used for forming a magnetic field opposite to the magnetic round roller (2-1), and the strength of the magnetic field is controlled by the circuit control system (1-3) through a voltage signal (1-2 a);
the waste bin (2-5) is used for containing magnetic ceramic pigment which loses the magnetic attraction effect due to the magnetic field offset caused by the inductance coil (2-4) and falls from the conveyor belt (2-3) due to the gravity effect;
the conveying system (3-1) is used for driving the conveying belt (2-3) to operate and convey, so that the magnetic ceramic pigment is sequentially transferred from the bottom of the magnetic round roller (2-1) through the permanent magnet flat plate (3-2) and the heating system (4-2) by the conveying belt (2-3);
the permanent magnet flat plate (3-2) is larger than the area of the to-be-printed pattern (1-1) and is used for adsorbing the magnetic ceramic pigment corresponding to the to-be-printed pattern (1-1) on the conveying belt (2-3);
the carrier conveying system (4-1) is used for driving the carriers to operate, and the operation speed of the carrier conveying system is the same as the transmission speed of the conveying belt (2-3); the carrier is positioned below the heating system (4-2) and is used for carrying the magnetic ceramic pigment which leaves the permanent magnet flat plate (3-2) to lose the magnetic attraction effect and falls from the conveyor belt (2-3) due to the gravity effect;
the heating system (4-2) is used for heating the magnetic ceramic pigment on the carrier to adhere to the carrier.
2. The ceramic laser printing system based on magnetic force according to claim 1, wherein: the magnetic ceramic pigment has a wrapping structure of at least three layers, namely soft magnetic material particles are used as an inner core, a middle layer is used as a protective cosmetic layer, and an outer layer is ceramic pigment.
3. The ceramic laser printing system based on magnetic force according to claim 2, wherein: the inner core radius, the thickness of the protective cosmetic layer and the thickness of the outer ceramic pigment are 1:0.01-2:2-6.
4. The ceramic laser printing system based on magnetic force according to claim 2, wherein: the magnetic ceramic pigment also comprises a hydrophobic finishing layer on the surface layer.
5. The ceramic laser printing system based on magnetic force according to claim 2, wherein: the soft magnetic material is Fe 3 O 4 Ferrite, alnico, iron-chromium-cobalt, neodymium-iron-boron, samarium-cobalt and alnico, and the grain diameter is 0.5-3 mu m.
6. The ceramic laser printing system based on magnetic force according to claim 2, wherein: the protective cosmetic layer is ZrSiO 4 、ZrO 2 、TiO 2 、Al 2 O 3 、SiO 2 。
7. The ceramic laser printing system based on magnetic force according to one of claims 2-6, characterized in that: the preparation method of the magnetic ceramic pigment comprises the following steps:
(1) Preparation of coated core powder
Preparing the protective cosmetic layer on the surfaces of the soft magnetic material particles by adopting a sol-gel method, a homogeneous precipitation method or an in-situ decomposition method to obtain wrapped core powder;
(2) Preparation of the Primary product
Ball-milling and mixing the wrapped core powder with ceramic pigment powder or frit, and calcining at 700-1300 ℃ to obtain a primary product which is a block material;
(3) Preparation of magnetic ceramic pigment
Ball-milling and crushing the block material, separating by a magnet, pickling, screening by the magnet, and drying to obtain the magnetic ceramic pigment; or further mixing with ethanol solution of fluorosilane, and drying to obtain the magnetic ceramic pigment with the surface hydrophobic modification layer.
8. The ceramic laser printing system based on magnetic force according to claim 7, wherein: in the step (1), an in-situ decomposition method is adopted, soft magnetic material particles are added into an ammonium zirconium carbonate aqueous solution with the concentration of 10-40% to form a stable suspension, wherein the dosage of the soft magnetic material particles is 10-50 wt% of the ammonium zirconium carbonate aqueous solution; heating the suspension by a microwave oven to form a zirconia layer on the surfaces of the soft magnetic material particles; drying the suspension after microwave treatment, and calcining at 500-900 ℃ for 1-3 hours to obtain the inner core powder coated with the zirconia layer.
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