CN107973591A - Improve the Nixing pottery dry pressuring forming process of even green body - Google Patents

Improve the Nixing pottery dry pressuring forming process of even green body Download PDF

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Publication number
CN107973591A
CN107973591A CN201711390457.8A CN201711390457A CN107973591A CN 107973591 A CN107973591 A CN 107973591A CN 201711390457 A CN201711390457 A CN 201711390457A CN 107973591 A CN107973591 A CN 107973591A
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blank
nixing pottery
powder
forming process
green body
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CN201711390457.8A
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Inventor
黄涛默
秦意霞
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Qinzhou Huaxia Taijiquan Ningxing Ceramic Art Co Ltd
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Qinzhou Huaxia Taijiquan Ningxing Ceramic Art Co Ltd
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Priority to CN201711390457.8A priority Critical patent/CN107973591A/en
Publication of CN107973591A publication Critical patent/CN107973591A/en
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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
    • C04B33/20—Preparing or treating the raw materials individually or as batches for dry-pressing
    • 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
    • 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
    • C04B33/13—Compounding ingredients
    • C04B33/131—Inorganic additives

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

The invention discloses a kind of Nixing pottery dry pressuring forming process for improving even green body, comprise the following steps：1) Nixing pottery pug is taken, adds the SiC particulate of its weight 0.1 0.5%, co-grinding, is first placed under 500 1000MHz and handles 20 25min, is subsequently placed under 100 200GHz and handles 1 3min, obtains clay powder；2) after sodium carboxymethylcellulose being mixed into clay powder, it is sent into dry granulating machine and carries out humidification granulation, obtains the powder that moisture content is 12 15%；3) it is 6~7% by powder drying to moisture content, up to blank；4) blank is packed into metal die cavity, 20~40s is suppressed under 20~30MPa of positive pressure, obtains molding blank.The present invention adds SiC particulate in traditional Nixing pottery pug and simultaneously combines microwave treatment, and it is smooth to can obtain surface, regular shape, the spherical particle of good fluidity, is adapted to subsequently dry-pressing formed.

Description

Improve the Nixing pottery dry pressuring forming process of even green body
Technical field
The present invention relates to the manufacture craft of Nixing pottery, and in particular to the dry-pressing formed work of Nixing pottery for improving even green body Skill.
Background technology
Qiezhou Nixing pottery ranks four big name of China with Jiangsu's purple sand ceramics, Yunnan Jian Shui potteries, Sichuan Rongchang County pottery and makes pottery, and enjoys great prestige At home and abroad.Nixing pottery conventional preparation techniques include preparing blank, blank forming, body drying and base substrate are fired, wherein, base Material preparation comprises the following steps：1) pug is selected：It is raw material first to select the eastern mud for the Qin Jiang two sides for crossing Qiezhou urban district and western mud, White clay (eastern mud) is distributed mainly on Jiang Yidong areas by the emperor himself, is mostly stored in low lying areas, and external appearance characteristic is soft for compact substance, is glued to be soft Soil；Western mud is distributed in Jiang Yixi by the emperor himself, and matter is hard, and iron-holder is high, and contains micro quartz sand.2) weathering：Because eastern mud is soft and thin, So being unable to air storage after excavating, prevention heavy rain drenches, and avoids pug from being lost in.And western mud is block hard paste, Necessary air storage, by the sunlight of 4~6 months, the effect frozen by the dissolving of rainwater and water, occurred western mud broken Dissipate, dissolve and aoxidize, reach the effect of weathering.3) ball milling：Water is added to be put into togerther ball mill (grinding medium in eastern mud and western mud in proportion Matter is cobblestone) it is ground and mixes, general 8 hours of ball milling, in order to make mud finer and smoother, Ball-milling Time can be increased.4) Press filtration：40 mesh and 100 mesh filter screens are crossed after ball milling, into sedimentation basin, stands after mud sediment, the clear water on upper strata is drained, then Mud bar is made by filter press dehydration in mud；5) vacuum pugging：The air in mud bar, pug warp are excluded using vacuum deairing machine After crossing application of vacuum, air content is low, improves plasticity, comprehensive and dry body hardness.6) it is aging：Pug is aging 15 in dark place It allows pug to play serial physical, chemical change in the nonventilated environment of humidity, can obtain the performance of pug up to blank To improvement, such as moisture moistening is uniformly, plasticity strengthens, mechanical strength increases, and dries in the shade so as to reduce in forming process and green compact During cracking.Blank forming mainly uses the throwing method of forming, slip casting, moulding moulage method, roll forming method, wherein Injection forming and roll forming method use gypsum mold, and moulding moulage method makees mould using sulphur, and roll forming method and stamp The method of forming uses plastic making blank, and injection forming uses slip casting blank.For traditional Nixing pottery manufacturing process Speech, whether blank preparation section or blank forming process, are all to use wet processing, and there are process cycle length, base substrate The defects of energy consumption for drying is high, with the development of Nixing pottery industrialization, the exploration to short period production technique also seems important all the more. It is dry-pressing formed, it is that a kind of technique is simple, easy to operate, the cycle is short, efficient forming method, but dry-pressing formed for mud The requirement of emerging greenwave material is high, and blank viscosity is too big made from conventional method, and the frictional force between blank is big, and mobility is very poor, Direct dry-pressing is easy to cause molding blank density unevenness one, is extremely unfavorable for being smoothed out for subsequent handling.
The content of the invention
, should the technical problem to be solved in the present invention is to provide a kind of Nixing pottery dry pressuring forming process for improving even green body Technique can improve the mobility of blank, suitable dry-pressing formed, greatly improve Nixing pottery producing efficiency, effectively eliminate molding blank The inhomogenous defect of Density Distribution, that improves molding blank burns till rate.
Technical solution provided by the invention is the preparation process of the blank of Nixing pottery, is comprised the following steps：
1) Nixing pottery pug is taken, adds the SiC particulate of its weight 0.1-0.5%, co-grinding, is first placed in 500- 20-25min is handled under 1000MHz, is subsequently placed under 100-200GHz and handles 1-3min, obtain clay powder；
2) after sodium carboxymethylcellulose being mixed into clay powder, it is sent into dry granulating machine and carries out humidification granulation, obtain Moisture content is the powder of 12-15%；
3) it is 6~7% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, 20~40s is suppressed under 20~30MPa of positive pressure, obtains into parison Body.
In step 1), SiC particulate is mixed into Nixing pottery pug, SiC particulate is handled under the microwave field of 500-1000MHz For 20-25min by phase mutual friction, collision produces substantial amounts of thermal energy, SiC particulate temperature is increased, thus cause Si-C disconnect with Al in Nixing pottery pug2O3React and generate the Al of pole shape4C3Phase, under the effect of 100-200GHz microwave powers, pole The Al of shape4C3Crystal shape, which changes, becomes more satisfactory spherical spherulite.The Al of generation4C3Spherulite is attached to Pug particle surface, greatly enhances the dispersiveness of Nixing pottery pug particle.And Al4C3Spherulite is very small, emerging for mud Pug grain shape of making pottery also there is certain repairing to act on so that the powder that dry method is made is rounder and more smooth, regular, further reduces Frictional force between powder.
In step 1), the weight ratio of eastern mud and western mud is 4~6：6~4.The eastern mud is mainly distributed on Jiang Yidong by the emperor himself Domain, is mostly stored in low lying areas, and compact substance is soft, is mild-clay, for color to show slightly yellow-white in red, iron-holder is high, and contains Micro quartz sand.Eastern mud plays a part of to adjust plasticity and associativity in the production technology of Nixing pottery.The western mud is main Region to the west of river by the emperor himself is distributed in, based on hillside, compact massive, is hard paste, is that a kind of iron-holder is higher on storage ground Purple mudstone, color are aubergine, and superficial layer has a small amount of irony to disseminate, and is hard paste, plasticity and associativity are poor.As excellent The weight ratio of choosing, eastern mud and western mud is 6：4.
In step 2), sodium carboxymethylcellulose belongs to anionic surfactant, mainly with R-COO- anionic forms In the presence of carbochain end absorption at this time is in silicon carbide, and hydrophilic carboxylic acid group is upward.Its molecule long-chain stretches in the solution to be played Steric hindrance acts on, and the reunion between pug particle is prevented along with the electrostatic repulsion double action between carboxylic acid group, so that Peptizaiton is played in dry powder.Compared with prior art, the invention has the advantages that：
1) added in traditional Nixing pottery pug and SiC particulate and combine microwave treatment, can obtain that surface is smooth, and shape is advised Then, the spherical particle of good fluidity, is adapted to follow-up dry-pressing formed.
2) addition of sodium carboxymethylcellulose can further enhance the dispersiveness of clay particle.
3) blank of the invention is very suitable for dry-pressing formed, and to can obtain blank density homogeneous into parison through dry-pressing formed Body.Since molding blank density is homogeneous, in follow-up sintering procedure, distortion and cracking are greatly reduced, improves yield rate.
Embodiment
The present invention is further elaborated for specific examples below, but not as a limitation of the invention.
Embodiment 1
1) it is 4 by weight to take eastern mud and western mud：6 are mixed to get Nixing pottery pug, add SiC of its weight 0.1% Grain, co-grinding to 200 mesh, is first placed under 500MHz and handles 20min, is subsequently placed under 100GHz and handles 1min, obtains clay Powder；
2) after 0.5% sodium carboxymethylcellulose of its weight being mixed into clay powder, it is sent into dry granulating machine and carries out Humidification is granulated, and obtains the powder that moisture content is 12%；
3) it is 6% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 20s under positive pressure 20MPa, obtain molding blank.
Embodiment 2
1) it is 6 by weight to take eastern mud and western mud：4 are mixed to get Nixing pottery pug, add SiC of its weight 0.5% Grain, co-grinding to 300 mesh, is first placed under 1000MHz and handles 25min, is subsequently placed under 200GHz and handles 3min, obtains clay Powder；
2) after 1% sodium carboxymethylcellulose of its weight being mixed into clay powder, it is sent into dry granulating machine and is increased Wet granulation, obtains the powder that moisture content is 15%；
3) it is 7% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 40s under positive pressure 30MPa, obtain molding blank.
Embodiment 3
1) it is 5 by weight to take eastern mud and western mud：5 are mixed to get Nixing pottery pug, add SiC of its weight 0.25% Grain, co-grinding to 250 mesh, is first placed under 800MHz and handles 22min, is subsequently placed under 150GHz and handles 2min, obtains clay Powder；
2) after 0.8% sodium carboxymethylcellulose of its weight being mixed into clay powder, it is sent into dry granulating machine and carries out Humidification is granulated, and obtains the powder that moisture content is 14%；
3) it is 6.5% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 30s under positive pressure 25MPa, obtain molding blank.
Embodiment 4
1) it is 6 by weight to take eastern mud and western mud：4 are mixed to get Nixing pottery pug, add SiC of its weight 0.1% Grain, co-grinding to 200 mesh, is first placed under 1000MHz and handles 20min, is subsequently placed under 200GHz and handles 1min, obtains clay Powder；
2) after 0.5% sodium carboxymethylcellulose of its weight being mixed into clay powder, it is sent into dry granulating machine and carries out Humidification is granulated, and obtains the powder that moisture content is 12%；
3) it is 6% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 30s under positive pressure 25MPa, obtain molding blank.
Reference examples 1
1) it is 6 by weight to take eastern mud and western mud：4 are mixed to get Nixing pottery pug, and co-grinding is made pottery to 200 mesh Native powder；
2) clay powder is sent into dry granulating machine and carries out humidification granulation, obtain the powder that moisture content is 12%；
3) it is 6% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 30s under positive pressure 25MPa, obtain molding blank.
Reference examples 2
1) it is 6 by weight to take eastern mud and western mud：4 are mixed to get Nixing pottery pug, and co-grinding is made pottery to 200 mesh Native powder；
2) after 0.5% sodium carboxymethylcellulose of its weight being mixed into clay powder, it is sent into dry granulating machine and carries out Humidification is granulated, and obtains the powder that moisture content is 12%；
3) it is 6% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 30s under positive pressure 25MPa, obtain molding blank.
Reference examples 3
1) it is 6 by weight to take eastern mud and western mud：4 are mixed to get Nixing pottery pug, add SiC of its weight 0.1% Grain, co-grinding to 200 mesh, is first placed under 1000MHz and handles 20min, is subsequently placed under 200GHz and handles 1min, obtains clay Powder；
2) clay powder is sent into dry granulating machine and carries out humidification granulation, obtain the powder that moisture content is 12%；
3) it is 6% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, suppresses 30s under positive pressure 25MPa, obtain molding blank.
1st, the blank of embodiment and reference examples is subjected to fluidity testing：
The property such as the mobility of powder and the grain composition of composition powder, shape, surface texture, the porosity of powder, density Matter is related, and plus complex relationships such as the adhesion between particle and internal frictions, the mobility of powder can not use single physical property Value is expressed.This experiment characterizes the mobility of blank with the slamp value of blank.The slamp value of blank is to first pass through Intelligent powder tester detects the tablet angle of blank obtained by each group experiment, angle of repose, the degree of compression, neat degree, then utilizes Carr slamp value methods are calculated.It is 25 parts that the above, which surveys quadrinomial parameter full marks, according to the size of parameters value Marking summation is carried out with reference to evaluation table and obtains the slamp value of blank, and specific evaluation method see the table below 1, the results are shown in Table 2.
Table 1
Table 2
2nd, the base substrate of embodiment and reference examples is carried out burning till rate test：
The base substrate of Example 1~4 and the obtained medium-sized vase of reference examples 1~3 (a diameter of 30cm, height respectively For 60cm) it is 100 each, above-mentioned base substrate is placed in carrying out conventional firing at 1150 DEG C, and statistics burns till rate respectively, and concrete outcome is seen below Table：

Claims (5)

1. improve the Nixing pottery dry pressuring forming process of even green body, it is characterised in that：Comprise the following steps：
1) Nixing pottery pug is taken, adds the SiC particulate of its weight 0.1-0.5%, co-grinding, is first placed under 500-1000MHz 20-25min is handled, is subsequently placed under 100-200GHz and handles 1-3min, obtain clay powder；
2) after sodium carboxymethylcellulose being mixed into clay powder, it is sent into dry granulating machine and carries out humidification granulation, obtain aqueous Rate is the powder of 12-15%；
3) it is 6~7% by powder drying to moisture content, up to blank；
4) blank is packed into metal die cavity, 20~40s is suppressed under 20~30MPa of positive pressure, obtains molding blank.
2. the Nixing pottery dry pressuring forming process according to claim 1 for improving even green body, it is characterised in that：Step 1) In, Nixing pottery pug is made of eastern mud and western mud, its weight ratio is 4~6：6~4.
3. the Nixing pottery dry pressuring forming process according to claim 2 for improving even green body, it is characterised in that：Eastern mud and The weight ratio of western mud is 6：4.
4. the Nixing pottery dry pressuring forming process according to claim 1 for improving even green body, it is characterised in that：Step 1) In, co-grinding to 200-300 mesh.
5. the Nixing pottery dry pressuring forming process according to claim 1 for improving even green body, it is characterised in that：Step 2) In, the dosage of sodium carboxymethylcellulose is the 0.5-1% of clay powder weight.
CN201711390457.8A 2017-12-21 2017-12-21 Improve the Nixing pottery dry pressuring forming process of even green body Pending CN107973591A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108516800A (en) * 2018-06-07 2018-09-11 佛山市东鹏陶瓷有限公司 A kind of adobe of dry method powder and glazed ceramic wall tile production method
CN108530023A (en) * 2018-05-28 2018-09-14 钦州学院 The connection method of Nixing pottery green body
CN110204303A (en) * 2019-04-30 2019-09-06 广西陶匠智能科技有限公司 A kind of clay formula of 3D printing large size Nixing pottery device
CN112358278A (en) * 2020-10-28 2021-02-12 钦州市文承陶业文化有限公司 Nixing pottery rapid manufacturing process suitable for dry pressing forming

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108530023A (en) * 2018-05-28 2018-09-14 钦州学院 The connection method of Nixing pottery green body
CN108516800A (en) * 2018-06-07 2018-09-11 佛山市东鹏陶瓷有限公司 A kind of adobe of dry method powder and glazed ceramic wall tile production method
CN110204303A (en) * 2019-04-30 2019-09-06 广西陶匠智能科技有限公司 A kind of clay formula of 3D printing large size Nixing pottery device
CN112358278A (en) * 2020-10-28 2021-02-12 钦州市文承陶业文化有限公司 Nixing pottery rapid manufacturing process suitable for dry pressing forming

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Application publication date: 20180501