CN115490501A - High-pressure slip casting process for ceramic blank - Google Patents
High-pressure slip casting process for ceramic blank Download PDFInfo
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- CN115490501A CN115490501A CN202211242982.6A CN202211242982A CN115490501A CN 115490501 A CN115490501 A CN 115490501A CN 202211242982 A CN202211242982 A CN 202211242982A CN 115490501 A CN115490501 A CN 115490501A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000007569 slipcasting Methods 0.000 title claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000004927 clay Substances 0.000 claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 13
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000007767 bonding agent Substances 0.000 claims abstract description 12
- 239000010433 feldspar Substances 0.000 claims abstract description 11
- 239000010453 quartz Substances 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 claims description 6
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052580 B4C Inorganic materials 0.000 claims description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 6
- 229910039444 MoC Inorganic materials 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910026551 ZrC Inorganic materials 0.000 claims description 6
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 6
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 6
- WXANAQMHYPHTGY-UHFFFAOYSA-N cerium;ethyne Chemical compound [Ce].[C-]#[C] WXANAQMHYPHTGY-UHFFFAOYSA-N 0.000 claims description 6
- 239000011133 lead Substances 0.000 claims description 6
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 claims description 6
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910003468 tantalcarbide Inorganic materials 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- -1 enamel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
-
- 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
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
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- C04B33/00—Clay-wares
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- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
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- C04B33/28—Slip casting
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a high-pressure grouting forming process for a ceramic blank, and relates to the technical field of ceramic forming. The high-pressure slip casting process for the ceramic blank comprises the following steps of: the method comprises the following steps: weighing the following raw materials of a ceramic blank in parts by weight: 50-100 parts of clay, 30-60 parts of quartz, 40-70 parts of feldspar, 20-40 parts of carbide, 3-15 parts of additive and 2-10 parts of bonding agent; step two: and (2) putting the clay, the quartz and the feldspar in the first step into a grinding machine for grinding for a certain time, sequentially adding the ground powder into a slurry mixing stirrer for stirring and mixing, and sequentially adding the carbide, the additive and the bonding agent in the stirring and mixing process for mixing and stirring for a certain time to obtain uniformly mixed ceramic blank slurry. The slurry is prepared through the mixing stirrer, and the slurry is injected into the mold, so that the process of preparing the slurry of the ceramic blank and molding the ceramic blank into a whole can be realized, and the production efficiency of the ceramic blank is favorably improved.
Description
Technical Field
The invention relates to the technical field of ceramic forming, in particular to a high-pressure slip casting process for a ceramic blank.
Background
The ceramic is a general name of pottery and porcelain, and is also an industrial art in China, the traditional ceramic industrial art in China has high quality, beautiful shape and high artistic value, and is famous in the world, the traditional concept of the ceramic refers to all artificial industrial products which take inorganic nonmetallic minerals such as clay and the like as raw materials, the artificial industrial products comprise various products which are prepared by mixing, forming and calcining clay or mixtures containing the clay, the range from the coarsest earthenware to the finest refined pottery and porcelain belongs to the range, the main raw materials of the artificial industrial products are silicate minerals such as clay, feldspar, quartz and the like which belong to the nature, therefore, the artificial industrial products belong to the silicate industry together with industries such as glass, cement, enamel, refractory materials and the like, in the field of ceramic manufacture, blank forming is an important step for manufacturing the ceramic, and the grouting process is a core link of blank forming.
At present, the slip casting of a ceramic blank is an important production process in the production process of ceramics, but the existing slip casting process has the problem that the density of the blank is not high in the slip casting process of the ceramic blank, so that the strength of the ceramic blank obtained by slip casting is low, and the sintering quality of the subsequent blank is influenced, so that a high-pressure slip casting process of the ceramic blank is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high-pressure grouting forming process for a ceramic blank, and solves the problem that the ceramic blank obtained by grouting forming is low in strength due to the fact that the compactness of the blank is low in the grouting forming process of the ceramic blank in the conventional grouting forming process.
In order to achieve the purpose, the invention is realized by the following technical scheme: a high-pressure slip casting process for ceramic blanks comprises the following steps:
the method comprises the following steps: weighing the following raw materials of a ceramic blank in parts by weight: 50-100 parts of clay, 30-60 parts of quartz, 40-70 parts of feldspar, 20-40 parts of carbide, 3-15 parts of additive and 2-10 parts of binding agent;
step two: putting the clay, quartz and feldspar raw materials obtained in the step one into a grinding machine for grinding for a certain time, sequentially adding the powder obtained after grinding into a slurry mixing stirrer for stirring and mixing, and sequentially adding carbide, an additive and a bonding agent during stirring and mixing for mixing and stirring for a certain time, thereby obtaining uniformly mixed ceramic blank slurry;
step three: selecting a high-strength mould according to the requirement of ceramic blank grouting molding, approaching two parts of the mould through a mould closing assembly, locking and fixing the two parts of the mould through a mould locking assembly, and keeping the pressure of mould locking within a preset range;
step four: connecting a mold grouting port after mold closing in the third step with the output end of a conveying pump, opening a water outlet vent hole of the mold, and slowly injecting the ceramic blank slurry obtained in the second step into the mold by the conveying pump at a low speed under certain pressure;
step five: increasing the power of the delivery pump in the fourth step, injecting slurry into the cavity of the mold, and maintaining the pressure and time of the slurry in a specified range;
step six: step five, after the grouting time is over, the delivery pump is replaced by a high-pressure pump to perform high-pressure grouting at certain pressure and time, the opening of the water outlet air outlet through hole of the mold is kept in the high-pressure grouting process, and other pipelines are closed;
step seven: after the high-pressure grouting is finished, discharging redundant ceramic blank slurry in the mold cavity into a recovery tank through a slurry discharge hole of the mold for subsequent ceramic blank grouting forming, and discharging water in the mold cavity at the same time, so that the slurry forms a ceramic blank prototype in the mold cavity;
step eight: and gradually recovering the pressure in the die cavity to the external pressure of the die by controlling the die locking assembly, then controlling the die locking assembly to separate the two parts of the die, and drying the ceramic blank by drying equipment after opening division to obtain the prepared ceramic blank.
Preferably, the carbide in the first step comprises one or more of silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide and tantalum carbide, and the bonding agent is a mixture of tin, boron, zinc, lead and titanium.
Preferably, the rotation speed of the mixing stirrer in the second step is 300-500r/min, and the stirring time is 30-80min.
Preferably, the mold locking pressure in the third step is kept at 30-45MPa.
Preferably, the pressure range in the fourth step is 0.4-0.6Mpa, and the pressurizing time is 5-10s.
Preferably, the pressure range in the fifth step is controlled to be 0.6-0.9Mpa, and the time is controlled to be 80-160s.
Preferably, the high pressure range in the sixth step is 1.2-1.6MPa, and the pressurizing time is controlled within 200-300s.
Preferably, the temperature of the drying equipment in the step eight is controlled to be 100-200 ℃, and the drying time is 2-8min.
The invention provides a high-pressure slip casting process for a ceramic blank. The method has the following beneficial effects:
1. according to the invention, the ceramic raw materials are uniformly stirred and mixed by the mixing stirrer to prepare the slurry of the ceramic blank, then the slurry is firstly injected into the mold at a low speed, so that the problem of splashing of the slurry in the mold can be avoided, then the power of the delivery pump is increased, the grouting speed is increased, so that the slurry can rapidly enter the cavity of the mold and the gas in the cavity is discharged, the preparation efficiency of the ceramic blank can be improved, the problem of ceramic blank quality reduction caused by bubbles in the gas of the ceramic blank can be avoided, finally, the high-pressure grouting is carried out by replacing the high-pressure pump, so that the grouting efficiency of the ceramic blank can be further improved, the production efficiency can be improved, the process of integrating the preparation of the slurry of the ceramic blank and the molding of the ceramic blank can be realized, the production efficiency of the ceramic blank can be improved, time and labor are saved, and convenience and rapidness are realized.
2. According to the invention, the carbide and the additive are added into the ceramic blank slurry, and the carbide contains one or more of silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide and tantalum carbide, so that the prepared ceramic blank has very high melting point, hardness and wear resistance, and the mixture of tin, boron, zinc, lead and titanium contained in the additive can further improve the oxidation resistance and wear resistance of the surface of the ceramic blank, so that the overall strength of the ceramic blank is remarkably improved, the subsequent sintering of the ceramic blank is facilitated, and the quality and quality of the product preparation are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a high-pressure slip casting process for a ceramic blank, which comprises the following steps:
the method comprises the following steps: weighing the following raw materials of a ceramic blank in parts by weight: 50 parts of clay, 30 parts of quartz, 40 parts of feldspar, 20 parts of carbide, 3 parts of additive and 2 parts of binding agent;
step two: putting the clay, quartz and feldspar raw materials obtained in the step one into a grinding machine for grinding for a certain time, sequentially adding the powder obtained after grinding into a slurry mixing stirrer for stirring and mixing, and sequentially adding carbide, an additive and a bonding agent during stirring and mixing for mixing and stirring for a certain time, thereby obtaining uniformly mixed ceramic blank slurry;
step three: selecting a high-strength mold according to the requirement of ceramic blank grouting molding, approaching two parts of the mold through a mold closing assembly, locking and fixing the two parts of the mold through a mold locking assembly, and keeping the pressure of mold locking within a preset range;
step four: connecting a mold grouting port after mold closing in the third step with the output end of a conveying pump, opening a water outlet vent hole of the mold, and slowly injecting the ceramic blank slurry obtained in the second step into the mold by the conveying pump at a low speed under certain pressure;
step five: increasing the power of the delivery pump in the fourth step, injecting slurry into the cavity of the mold, and maintaining the pressure and time of the slurry in a specified range;
step six: replacing the delivery pump with a high-pressure pump to perform high-pressure grouting at certain pressure and time after the grouting time is over, keeping the opening of the water outlet air outlet through hole of the mold in the high-pressure grouting process, and closing other pipelines;
step seven: after the high-pressure grouting is finished, discharging redundant ceramic blank slurry in the mold cavity into a recovery tank through a slurry discharge hole of the mold for subsequent ceramic blank grouting forming, and discharging water in the mold cavity at the same time, so that the slurry forms a ceramic blank prototype in the mold cavity;
step eight: and gradually recovering the pressure in the die cavity to the external pressure of the die by controlling the die locking assembly, then controlling the die locking assembly to separate the two parts of the die, and drying the ceramic blank by drying equipment after opening division to obtain the prepared ceramic blank.
Carry out even stirring mixture to ceramic raw materials through mixing mixer and prepare the thick liquids of ceramic blank, then through the first low-speed slip casting in to the mould, can avoid the problem that the thick liquids splashes in the mould, then through the power that increases the delivery pump, slip casting speed has been improved, thereby make the quick mould cavity that enters into of thick liquids and with the gaseous discharge in the cavity, the efficiency of preparing of ceramic blank both can be improved, can avoid ceramic blank again because gaseous bubble appears and cause the problem that ceramic blank quality descends, carry out high-pressure slip casting through changing the high-pressure pump at last, the slip casting efficiency of ceramic blank can further be improved, thereby be favorable to improving production efficiency, to sum up can realize that ceramic blank thick liquids are prepared, ceramic blank shaping in an organic whole technology, be favorable to promoting the production efficiency of ceramic blank, time saving and labor saving, and convenient and fast.
The carbide in the first step comprises one or more of silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide and tantalum carbide, and the bonding agent is a mixture of tin, boron, zinc, lead and titanium.
The rotating speed of the mixing stirrer in the step two is 300r/min, and the stirring time is 30min.
The mold locking pressure in step three was maintained at 30Mpa.
In the fourth step, the pressure range is 0.4Mpa, and the pressurizing time is 5s.
And controlling the pressure range in the fifth step to be 0.6Mpa and the time to be 80s.
And the high pressure range in the sixth step is 1.2MPa, and the pressurizing time is controlled to be 200s.
And step eight, controlling the temperature of the drying equipment at 100 ℃ and drying for 2min.
Because the carbide contains one or more of silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide and tantalum carbide, the prepared ceramic blank has very high melting point, hardness and wear resistance, and the mixture of tin, boron, zinc, lead and titanium contained in the additive can further improve the oxidation resistance and wear resistance of the surface of the ceramic blank, so that the overall strength of the ceramic blank is remarkably improved, the subsequent sintering of the ceramic blank is facilitated, and the quality of product preparation is favorably improved.
Example two:
the embodiment of the invention provides a high-pressure slip casting process for a ceramic blank, which comprises the following steps:
the method comprises the following steps: weighing the following raw materials of a ceramic blank in parts by weight: 100 parts of clay, 60 parts of quartz, 70 parts of feldspar, 40 parts of carbide, 15 parts of additive and 10 parts of bonding agent;
step two: putting the clay, quartz and feldspar raw materials obtained in the first step into a grinding machine for grinding for a certain time, sequentially adding the ground powder into a slurry mixing stirrer for stirring and mixing, and sequentially adding a carbide, an additive and a bonding agent during stirring and mixing for mixing and stirring for a certain time to obtain uniformly mixed ceramic blank slurry;
step three: selecting a high-strength mould according to the requirement of ceramic blank grouting molding, approaching two parts of the mould through a mould closing assembly, locking and fixing the two parts of the mould through a mould locking assembly, and keeping the pressure of mould locking within a preset range;
step four: connecting a mould grouting port after mould assembly in the third step with the output end of a delivery pump, opening a water outlet vent hole out of the mould, and slowly injecting the ceramic blank slurry obtained in the second step into the mould by the delivery pump at a low speed under a certain pressure;
step five: increasing the power of the delivery pump in the fourth step, injecting slurry into the cavity of the mold, and maintaining the pressure and time of the slurry in a specified range;
step six: replacing the delivery pump with a high-pressure pump to perform high-pressure grouting at certain pressure and time after the grouting time is over, keeping the opening of the water outlet air outlet through hole of the mold in the high-pressure grouting process, and closing other pipelines;
step seven: after the high-pressure grouting is finished, discharging redundant ceramic blank slurry in the mold cavity into a recovery tank through a slurry discharge hole of the mold for subsequent ceramic blank grouting forming, and discharging water in the mold cavity at the same time, so that the slurry forms a ceramic blank prototype in the mold cavity;
step eight: and gradually recovering the pressure in the die cavity to the external pressure of the die by controlling the die locking assembly, then controlling the die locking assembly to separate the two parts of the die, and drying the ceramic blank by drying equipment after opening division to obtain the prepared ceramic blank.
In the first step, the carbide comprises one or more of silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide and tantalum carbide, and the bonding agent is a mixture of tin, boron, zinc, lead and titanium.
The rotating speed of the mixing stirrer in the step two is 500r/min, and the stirring time is 80min.
The mold clamping pressure in step three was kept at 45Mpa.
In the fourth step, the pressure range is 0.6Mpa, and the pressurizing time is 10s.
And controlling the pressure range in the fifth step to be 0.9MPa and the time to be 160s.
And the high pressure range in the sixth step is 1.6MPa, and the pressurizing time is controlled to be 300s.
And step eight, controlling the temperature of the drying equipment at 200 ℃ and the drying time at 8min.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A high-pressure grouting forming process for a ceramic blank is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: weighing the following raw materials of a ceramic blank in parts by weight: 50-100 parts of clay, 30-60 parts of quartz, 40-70 parts of feldspar, 20-40 parts of carbide, 3-15 parts of additive and 2-10 parts of bonding agent;
step two: putting the clay, quartz and feldspar raw materials obtained in the step one into a grinding machine for grinding for a certain time, sequentially adding the powder obtained after grinding into a slurry mixing stirrer for stirring and mixing, and sequentially adding carbide, an additive and a bonding agent during stirring and mixing for mixing and stirring for a certain time, thereby obtaining uniformly mixed ceramic blank slurry;
step three: selecting a high-strength mold according to the requirement of ceramic blank grouting molding, approaching two parts of the mold through a mold closing assembly, locking and fixing the two parts of the mold through a mold locking assembly, and keeping the pressure of mold locking within a preset range;
step four: connecting a mold grouting port after mold closing in the third step with the output end of a conveying pump, opening a water outlet vent hole of the mold, and slowly injecting the ceramic blank slurry obtained in the second step into the mold by the conveying pump at a low speed under certain pressure;
step five: increasing the power of the delivery pump in the fourth step, injecting slurry into the cavity of the mold, and maintaining the slurry injection pressure and time within a specified range;
step six: replacing the delivery pump with a high-pressure pump to perform high-pressure grouting at certain pressure and time after the grouting time is over, keeping the opening of the water outlet air outlet through hole of the mold in the high-pressure grouting process, and closing other pipelines;
step seven: after the high-pressure grouting is finished, discharging redundant ceramic blank slurry in the mold cavity into a recovery tank through a slurry discharge hole of the mold for subsequent ceramic blank grouting forming, and discharging water in the mold cavity at the same time, so that the slurry forms a ceramic blank prototype in the mold cavity;
step eight: and gradually recovering the pressure in the die cavity to the external pressure of the die by controlling the die locking assembly, then controlling the die locking assembly to separate the two parts of the die, and drying the ceramic blank by drying equipment after opening division to obtain the prepared ceramic blank.
2. The high-pressure grouting forming process for the ceramic blank according to claim 1, characterized in that: the carbide in the first step comprises one or more of silicon carbide, boron carbide, cerium carbide, molybdenum carbide, niobium carbide, zirconium carbide, titanium carbide, vanadium carbide, tungsten carbide and tantalum carbide, and the bonding agent is a mixture of tin, boron, zinc, lead and titanium.
3. The high-pressure grouting forming process for the ceramic blank according to claim 1, characterized in that: the rotating speed of the mixing stirrer in the step two is 300-500r/min, and the stirring time is 30-80min.
4. The high-pressure grouting forming process for the ceramic blank according to claim 1, characterized in that: and the mold locking pressure in the third step is kept at 30-45Mpa.
5. The high-pressure slip casting process for the ceramic blank according to claim 1, wherein: in the fourth step, the pressure range is 0.4-0.6Mpa, and the pressurizing time is 5-10s.
6. The high-pressure slip casting process for the ceramic blank according to claim 1, wherein: and controlling the pressure range in the step five to be 0.6-0.9Mpa and the time to be 80-160s.
7. The high-pressure grouting forming process for the ceramic blank according to claim 1, characterized in that: the high pressure range in the sixth step is 1.2-1.6Mpa, and the pressurizing time is controlled at 200-300s.
8. The high-pressure grouting forming process for the ceramic blank according to claim 1, characterized in that: and step eight, controlling the temperature of the drying equipment at 100-200 ℃ and the drying time at 2-8min.
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Application publication date: 20221220 |