CN107825566A - The dry-pressing formed method of Nixing pottery - Google Patents
The dry-pressing formed method of Nixing pottery Download PDFInfo
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- CN107825566A CN107825566A CN201711071600.7A CN201711071600A CN107825566A CN 107825566 A CN107825566 A CN 107825566A CN 201711071600 A CN201711071600 A CN 201711071600A CN 107825566 A CN107825566 A CN 107825566A
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- blank
- clay
- mud
- nixing pottery
- clay powder
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- 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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
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- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses a kind of dry-pressing formed method of Nixing pottery, comprise the following steps：1) take eastern mud and western mud to mix, be crushed to 80~120 mesh, obtain clay powder；2) toward the sodium tartrate and 0.01~0.02% silicone emulsion that its weight 0.02~0.05% is added in clay powder, moisture content is added water to as 5~10%, mixes, obtains blank；3) blank is packed into metal die cavity, 10~30s is suppressed under 15~25MPa of positive pressure, obtains molding blank.The present invention adds micro sodium tartrate and silicone emulsion in traditional Nixing pottery clay, can greatly increase the mobility of blank, reduces between clay particle and the frictional force between clay and die wall, so as to obtain the homogeneous molding blank of blank density.Because molding blank density is homogeneous, in follow-up sintering procedure, distortion and cracking is greatly reduced, improves yield rate.
Description
Technical field
The present invention relates to the forming method of Nixing pottery, and in particular to the dry-pressing formed method of Nixing pottery.
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 made pottery, and enjoys great prestige
At home and abroad.It by the distinctive eastern mud in Qinzhou Prefecture and western mud is raw material that Nixing pottery, which is, by weathering, ball milling, press filtration, vacuum pugging, old
Blank is made after corruption, then through being molded, drying, the technique such as firing and be made.Nixing pottery moulding process mainly uses hand throwing, enters
Introduced new forming method after entering semi-mechanization production, i.e., the throwing method of forming, slip casting, moulding moulage method, be rolled into
Type method, wherein injection forming and roll forming method use gypsum mold, and moulding moulage method makees mould using sulphur, and roll forming
Method and moulding moulage method use plastic making blank, and injection forming uses slip casting blank.Above-mentioned forming method is
Wet moulding, the defects of long process cycle, body drying high energy consumption be present.With the development of Nixing pottery industrialization, to short week
The exploration of phase production technology also seems important all the more.And it is dry-pressing formed, it is that a kind of technique is simple, easy to operate, the cycle is short, effect
The high forming method of rate.Patent of invention such as Publication No. CN102229184A discloses a kind of Nixing pottery dry process for forming,
Eastern mud and western mud are crushed to 80~120 mesh, by 5~6:4~5 weight obtains clay powder than mixing；Further according to product shape
Shape selects suitable aluminum alloy mould, and aluminum alloy mould is fixed on hydraulic press, and clay powder then is inserted into aluminium and closed
It is compressing in the case where positive pressure is 80~400 tons of pressure condition in the die cavity of golden lower mould.Because the technique is unidirectional
Pressurization, the bearing plate and formpiston of mould lower end are fixed, are only pressurizeed by formpiston by top, due between clay and clay
Frictional resistance between die wall is sizable, necessarily causes obvious barometric gradient, thus the blank structure being pressed into have it is bright
Aobvious anisotropy, Density Distribution heterogeneity, and this Density inhomogeneity is distributed in follow-up sintering procedure and easily causes to distort
And cracking, for the small-sized vessel of Nixing pottery (diameter ＜ 25cm, height ＜ 40cm), distortion and cracking probability are 30% left
The right side, for medium-sized vessel (25cm≤diameter ＜ 40cm, 40cm≤height ＜ 80cm), distortion and cracking probability are 50% left
The right side, for the large-scale vessel of Nixing pottery (diameter >=40cm, height >=80cm), distortion and cracking probability are just higher, even
Up to more than 70%, largely effect on product quality.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of dry-pressing formed method of Nixing pottery, the technique can effectively disappear
Except the inhomogenous defect of molding blank Density Distribution, that improves molding blank burns till rate.
Technical scheme provided by the invention is the dry-pressing formed method of Nixing pottery, is comprised the following steps：
1) take eastern mud and western mud to mix, be crushed to 80~120 mesh, obtain clay powder；
2) toward the sodium tartrate and 0.01~0.02% silicone emulsion that its weight 0.02~0.05% is added in clay powder,
It is 5~10% to add water to moisture content, mixes, obtains blank；
3) blank is packed into metal die cavity, 10~30s is suppressed under 15~25MPa of positive pressure, obtains into parison
Body.
In step 1), the weight ratio of eastern mud and western mud is 4~6：6~4.Described eastern mud is mainly distributed on Jiang Yidong by the emperor himself
Domain, low lying areas are mostly stored in, 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.Described western mud is main
Region to the west of river by the emperor himself is distributed in, storage ground compact massive, is hard paste, is that a kind of iron-holder is higher based on hillside
Purple mudstone, color are aubergine, and superficial layer has a small amount of irony to contaminate, 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), Nixing pottery clay particles are negatively charged, and positive corpusc(u)le can be adsorbed in water and forms micelle, i.e. clay particle band
Negative electricity, enter micelle adsorption layer with the big positive corpusc(u)le of electronegative clay particles active force, and it is small with clay particles active force
Positive corpusc(u)le can only enter the diffusion layer of micelle.Under regular situation, adsorption layer positive corpusc(u)le is more, easily neutralizes the negative electricity of clay particles
Lotus so that the repulsive force of adjacent negative electrical charge clay particles reduces, simply clay particles adhesion cohesion, poor fluidity.The application exists
Sodium tartrate and silicone emulsion are added in Nixing pottery pug, sodium tartrate is dissociated into-COO-And Na+, silicone emulsion may be such that-
COO-It is coated on Na+Outside, so-COO-Cation that can be first with clay particles adsorption layer is combined, and another part-
COO-Then towards solution so that the adsorption layer charge reversal of clay particles, elecrtonegativity enhancing, the repulsive force with adjacent clay particles
Increase, the stability of micelle is added, so as to improve the mobility of blank.Moreover, adsorption layer charge reversal, elecrtonegativity increase
By force, with Na+Forming diffusion electric double layer so that diffusion layer thickeies, electro kinetic potential increase, and repulsive force increases between clay particles, so as to
Improve the mobility of blank.Therefore, because addition, the mobility of blank can be greatly enhanced, can be big during compressing
Frictional force between the big frictional force reduced between clay particle and clay particle and die wall, so as to obtain density it is homogeneous into
Parison body, and then improve the rate of burning till.
If only addition tartaric acid, tartaric acid is dissociated into-COO-And Na+, Na+Ionic radius is smaller, and charge density is big,
It is big with electronegative clay particles active force, easily enter micelle adsorption layer, neutralize most of electric charge in clay particles so that phase
Repulsive force between adjacent clay particles greatly reduces, and clay particles adhesion cohesion, reduces mobility on the contrary.
In step 2), the addition of sodium tartrate is the 0.035% of clay powder, and the addition of silicone emulsion is clay powder
The 0.015% of end.
Compared with prior art, the present invention adds micro silicone emulsion and tartaric acid in traditional Nixing pottery clay
Sodium, can greatly increase the mobility of clay particle, reduce between clay particle and the frictional force between clay and die wall, from
And obtain the homogeneous molding blank of blank density.Because molding blank density is homogeneous, in follow-up sintering procedure, greatly reduce
Distortion and cracking, improve 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 mixing, are crushed to 80 mesh, obtain clay powder；
2) toward the sodium tartrate and 0.01% silicone emulsion that its weight 0.02% is added in clay powder, moisture content is added water to
For 5%, mix, obtain blank；
3) blank is packed into metal die cavity, 10s is suppressed under positive pressure 15MPa, obtain the base substrate of small-sized teapot
(a diameter of 25cm, being highly 12cm).
Embodiment 2
1) it is 1 by weight to take eastern mud and western mud:1 mixing, is crushed to 120 mesh, obtains clay powder；
2) toward the sodium tartrate and 0.02% silicone emulsion that its weight 0.05% is added in clay powder, moisture content is added water to
For 10%, mix, obtain blank；
3) blank is packed into metal die cavity, 30s is suppressed under positive pressure 25MPa, obtain the base substrate of medium-sized vase
(a diameter of 30cm, being highly 60cm).
Embodiment 3
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 100 mesh, obtain clay powder；
2) toward the sodium tartrate and 0.015% silicone emulsion that its weight 0.035% is added in clay powder, add water to aqueous
Rate is 8%, mixes, obtains blank；
3) blank is packed into metal die cavity, 20s is suppressed under positive pressure 20MPa, obtain the base substrate of large-scale vase
(a diameter of 55cm, being highly 100cm).
Reference examples 1
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 100 mesh, obtain clay powder；
2) toward moisture content is added water in clay powder as 8%, mix, obtain blank；
3) blank is packed into metal die cavity, 20s is suppressed under positive pressure 20MPa, obtain the base substrate of large-scale vase
(a diameter of 55cm, being highly 100cm).
Reference examples 1 '
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 100 mesh, obtain clay powder；
2) toward the sodium tartrate that its weight 0.035% is added in clay powder, moisture content is added water to as 8%, mixes, obtains
Blank；
3) blank is packed into metal die cavity, 20s is suppressed under positive pressure 20MPa, obtain the base substrate of large-scale vase
(a diameter of 55cm, being highly 100cm).
Embodiment 4
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 80 mesh, obtain clay powder；
2) toward the sodium tartrate and 0.015% silicone emulsion that its weight 0.035% is added in clay powder, add water to aqueous
Rate is 5%, mixes, obtains blank；
3) blank is packed into metal die cavity, 30s is suppressed under positive pressure 15MPa, obtain the base substrate of medium-sized vase
(a diameter of 30cm, being highly 60cm).
Reference examples 2
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 80 mesh, obtain clay powder；
2) toward clay powder, it is 5% to add water to moisture content, mixes, obtains blank；
3) blank is packed into metal die cavity, 30s is suppressed under positive pressure 15MPa, obtain the base substrate of medium-sized vase
(a diameter of 30cm, being highly 60cm).
Reference examples 2 '
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 80 mesh, obtain clay powder；
2) toward the sodium tartrate that its weight 0.035% is added in clay powder, moisture content is added water to as 5%, mixes, obtains
Blank；
3) blank is packed into metal die cavity, 30s is suppressed under positive pressure 15MPa, obtain the base substrate of medium-sized vase
(a diameter of 30cm, being highly 60cm).
Embodiment 5
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 120 mesh, obtain clay powder；
2) toward the sodium tartrate and 0.015% silicone emulsion that its weight 0.035% is added in clay powder, add water to aqueous
Rate is 10%, mixes, obtains blank；
3) blank is packed into metal die cavity, 10s is suppressed under positive pressure 25MPa, obtain the base substrate of small-sized teapot
(a diameter of 25cm, being highly 12cm).
Reference examples 3
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 120 mesh, obtain clay powder；
2) toward moisture content is added water in clay powder as 10%, mix, obtain blank；
3) blank is packed into metal die cavity, 10s is suppressed under positive pressure 25MPa, obtain the base substrate of small-sized teapot
(a diameter of 25cm, being highly 12cm).
Reference examples 3 '
1) it is 6 by weight to take eastern mud and western mud：4 mixing, are crushed to 120 mesh, obtain clay powder；
2) toward the sodium tartrate that its weight 0.035% is added in clay powder, moisture content is added water to as 10%, mixes, obtains
To blank；
3) blank is packed into metal die cavity, 10s is suppressed under positive pressure 25MPa, obtain the base substrate of small-sized teapot
(a diameter of 25cm, being highly 12cm).
Experimental example
Each 100 of molding blank made from difference Example 1~5 and reference examples 1~3 and 1 '~3 ', above-mentioned base
Body is placed in carrying out conventional firing at 1150 DEG C, and statistics burns till rate respectively, and concrete outcome see the table below：
| Group | Base substrate sum (individual) | Distort (individual) | Ftracture (individual) | Burn till rate (%) |
| Embodiment 1 | 100 | 1 | 1 | 98 |
| Embodiment 2 | 100 | 4 | 3 | 93 |
| Embodiment 3 | 100 | 4 | 6 | 90 |
| Reference examples 1 | 100 | 38 | 27 | 35 |
| Reference examples 1 ' | 100 | 46 | 26 | 28 |
| Embodiment 4 | 100 | 3 | 1 | 96 |
| Reference examples 2 | 100 | 21 | 33 | 46 |
| Reference examples 2 ' | 100 | 28 | 29 | 43 |
| Embodiment 5 | 100 | 0 | 0 | 100 |
| Reference examples 3 | 100 | 19 | 9 | 72 |
| Reference examples 3 ' | 100 | 15 | 20 | 65 |
Claims (4)
1. the dry-pressing formed method of Nixing pottery, it is characterised in that：Comprise the following steps：
1) take eastern mud and western mud to mix, be crushed to 80~120 mesh, obtain clay powder；
2) toward the sodium tartrate and 0.01~0.02% silicone emulsion that its weight 0.02~0.05% is added in clay powder, water is added
It is 5~10% to moisture content, mixes, obtain blank；
3) blank is packed into metal die cavity, 10~30s is suppressed under 15~25MPa of positive pressure, obtains molding blank.
2. Nixing pottery dry pressuring forming process according to claim 1, it is characterised in that：In step 1), eastern mud and western mud
Weight ratio is 4~6：6~4.
3. Nixing pottery dry pressuring forming process according to claim 2, it is characterised in that：The weight of eastern mud and western mud ratio is 6：
4。
4. Nixing pottery dry pressuring forming process according to claim 1, it is characterised in that：In step 2), sodium tartrate adds
Enter 0.035% that amount is clay powder, the addition of silicone emulsion is the 0.015% of clay powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711071600.7A CN107825566A (en) | 2017-11-03 | 2017-11-03 | The dry-pressing formed method of Nixing pottery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071600.7A CN107825566A (en) | 2017-11-03 | 2017-11-03 | The dry-pressing formed method of Nixing pottery |
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| Publication Number | Publication Date |
|---|---|
| CN107825566A true CN107825566A (en) | 2018-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216777A (en) * | 2019-06-19 | 2019-09-10 | 河北金汇陶瓷有限公司 | Dry-pressing formed Ceramic Tiles green body production technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130398A (en) * | 2015-09-25 | 2015-12-09 | 钦州学院 | Dry pressing process for Nixing pottery |
| CN106518007A (en) * | 2016-11-14 | 2017-03-22 | 钦州学院 | Compression moulding method of Nixing pottery |
| CN107032749A (en) * | 2016-11-14 | 2017-08-11 | 钦州学院 | The compressing technique of Nixing pottery |
| CN107117937A (en) * | 2017-06-12 | 2017-09-01 | 钦州市钦南区科学技术情报研究所 | A kind of Nixing pottery soil and preparation method thereof |
-
2017
- 2017-11-03 CN CN201711071600.7A patent/CN107825566A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130398A (en) * | 2015-09-25 | 2015-12-09 | 钦州学院 | Dry pressing process for Nixing pottery |
| CN106518007A (en) * | 2016-11-14 | 2017-03-22 | 钦州学院 | Compression moulding method of Nixing pottery |
| CN107032749A (en) * | 2016-11-14 | 2017-08-11 | 钦州学院 | The compressing technique of Nixing pottery |
| CN107117937A (en) * | 2017-06-12 | 2017-09-01 | 钦州市钦南区科学技术情报研究所 | A kind of Nixing pottery soil and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216777A (en) * | 2019-06-19 | 2019-09-10 | 河北金汇陶瓷有限公司 | Dry-pressing formed Ceramic Tiles green body production technology |
| CN110216777B (en) * | 2019-06-19 | 2021-02-19 | 河北金汇陶瓷有限公司 | Production process of dry pressing ceramic tile blank |
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Application publication date: 20180323 |
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