CN111978069A - One-step forming surface carved glaze-free thin white porcelain product and integrated manufacturing process thereof - Google Patents
One-step forming surface carved glaze-free thin white porcelain product and integrated manufacturing process thereof Download PDFInfo
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Abstract
The invention relates to the technical field of ceramics, in particular to a one-step molded surface-engraved unglazed thin white porcelain product and an integrated firing process thereof. The one-step forming surface-engraved unglazed thin-body white porcelain product and the integrated firing process thereof break through the process that the prior thin-body porcelain can be subjected to blank thinning only by repeatedly erecting a blank, solve the technical bottleneck of low production efficiency and high cost, realize the one-step manufacture of the unglazed thin-body blank by the process of grouting first and rolling later, laminate the blank with the sunken grains in a die cavity by rolling to realize the engraving effect, the prepared unglazed thin-body white porcelain has the thickness of 0.5-1mm, the blank is thin and high in strength, the wall thickness of the white porcelain product is that the side wall of the white porcelain product is provided with the grains sunken inwards by 0.1-0.3mm, the light is transmitted from the grains when the white porcelain product is irradiated from inside to outside through the light, the color shows the bright and dark conversion effect, the one-step forming is elegant and beautiful, and the requirements of practicability and aesthetic quality can be further met.
Description
Technical Field
The invention relates to the technical field of ceramics, in particular to a one-step molded surface-engraved unglazed thin white porcelain product and an integrated firing process thereof.
Background
The thin-shell porcelain is also called 'tyre-removed porcelain' and 'eggshell porcelain'. It features that the porcelain body is as thin as egg shell, transparent and the body is made of pure glaze, and is one of the traditional artistic porcelain in China. The traditional porcelain with thin body is prepared by four or more processes from material preparation, blank drawing, blank benefiting, glazing, drawing and firing, and is all manually fired for three times. Particularly, the blank and the artistic processing are the most delicate, and the blank is trimmed for hundreds of times through rough trimming, fine trimming and the like to trim the rough blank with the thickness of two or three millimeters until the thickness of the body is mostly within 0.5-1 millimeter, so that the fired thin-body porcelain is thin like a cicada wing, bright like glass, light and floating.
The traditional decoration on the surface of the thin tire usually adopts a drawing form, common blue and white patterns, common pastel patterns and the like, and the blank thickness of the thin tire porcelain is only about 0.5-1mm, the blank is thin and the strength is low, so that the decoration is difficult to carry out by using a carving method, even if the carving is carried out, a large amount of experience is consumed by an experienced technician for carving, the operation difficulty is high, the yield is extremely low, and the thin tire porcelain is very easy to break and deform in the manufacturing process. In addition, the existing thin-body porcelain restricts that the requirements of large-scale industrialized and rapid production and stable products cannot be met, so that if the existing thin-body porcelain can be used for solving the production technical bottleneck of the existing thin-body porcelain, the thin-body porcelain has positive economic and social benefits.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a one-step molded surface-engraved unglazed thin white porcelain product and an integrated firing process thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the wall thickness of the white porcelain product is 0.5-1mm, the side wall of the white porcelain product is provided with grains which are sunken inwards by 0.1-0.3mm, and the raw material components of a white porcelain blank body are as follows: 30-40 parts of kaolin, 15-20 parts of alumina powder, 10-15 parts of potash feldspar, 10-15 parts of titanium oxide, 5-10 parts of titanium dioxide, 1-5 parts of cryolite, 1-3 parts of graphene, 1-3 parts of sodium tripolyphosphate and 1-5 parts of a release agent.
Further, the white porcelain body comprises the following raw material components: 38 parts of kaolin, 17 parts of alumina powder, 13 parts of potash feldspar, 14 parts of titanium oxide, 9 parts of titanium dioxide, 4 parts of cryolite, 2 parts of graphene, 1 part of sodium tripolyphosphate and 2 parts of a release agent.
The one-step forming process of making thin glaze-less white porcelain product includes the following steps:
step 1, weighing and mixing raw material components of the white porcelain blank according to the proportion, mixing and ball-milling for 20-30 hours to obtain ceramic blank slurry, wherein the mixing and ball-milling time is as follows: water: the proportion of the balls is 1: 2: 2-3;
step 3, injecting the blank slurry into a mold, absorbing water in the mold, and pouring out the residual slurry when the cup wall in the mold cavity reaches the required thickness;
step 4, when the water content of the blank is 15-20%, placing the mold into a roller press, extending a rolling head into the mold cavity, rolling the mud blank on the inner wall of the mold cavity, and conducting the acting force of the rolling head in the rolling process to tightly press the mud blank and the embossment grains to form grains on the side wall of the white porcelain product;
step 5, demolding after the blank body is dried to obtain a blank body of the white porcelain product;
and 6, putting the blank body of the white porcelain product into a kiln for burning and molding, wherein the burning temperature is 1306-1315 ℃, and the burning time is 18-26 hours.
Further, the mould comprises an inner mould and an outer mould, wherein the inner mould is provided with a mould cavity, and the outer mould is sleeved outside the inner mould and used for fixing the inner mould.
Further, the inner mold comprises a left mold and a right mold which are symmetrically arranged along the center line of the mold cavity.
Furthermore, the density of the slurry during grouting is 2.5-3g/cm3The thickening degree is 2.0-2.3g/cm3。
Furthermore, in the step 4, the included angle between the central line of the rolling head and the central line of the die cavity is 18-20 degrees.
Furthermore, the rolling speed of the rolling head is controlled at 50-60 m/min.
Furthermore, in step 6, the firing temperature is controlled as follows,
in the low temperature rise section, the kiln is preheated from normal temperature to 200 ℃ for 1-2 hours;
in a slow temperature rise section, the temperature of the kiln is quickly raised to 600 ℃ after 3-4 minutes;
in the constant-speed heating section, the temperature of the kiln is rapidly increased to 1100 ℃ for 4-5 hours;
in the heat preservation section, the temperature of the kiln is raised to 1230-1250 ℃ after 2-3 hours, and the heat is preserved for 1-2 hours at 1230 ℃;
in the firing temperature section, the kiln is heated to the firing temperature after 1-2 hours;
performing secondary heat preservation, and restoring the temperature of the kiln to 1230-1250 ℃, and preserving the heat for 1-2 hours;
cooling the temperature reduction section, and cooling to normal temperature after 6-8 hours to obtain the carved glaze-free thin body white porcelain product.
As can be seen from the above description of the invention, the one-step forming surface-engraved unglazed thin-body white porcelain product and the integrated firing process thereof break through the process that the prior thin-body porcelain needs to be repeatedly erected to realize the thin body of the blank, solve the technical bottlenecks of low production efficiency and high cost, the process of grouting first and rolling later realizes the one-time production of a glaze-free thin blank body, the blank body is jointed with the concave lines in the die cavity by rolling, so as to realize the effect of carving patterns, the prepared unglazed thin-bodied white porcelain has the thickness of only 0.5-1mm, the blank body is thin and has high strength, the wall thickness of the white porcelain product is that the side wall of the white porcelain product is provided with grains which are inwards sunken by 0.1-0.3mm, the light is transmitted from the lines when the light irradiates from the inside to the outside, the color shows the transformation effect of brightness and depth, the modeling is elegant and beautiful, and the requirements of practicability and aesthetic quality can be met.
Drawings
Fig. 1 is a schematic structural diagram of a mold in a process for manufacturing a once-formed surface-engraved unglazed thin white porcelain product.
FIG. 2 is a schematic diagram of a mold after grouting in a process for manufacturing a once-formed surface-engraved unglazed thin-bodied white porcelain product.
Fig. 3 is a schematic view of a mold for one-step molding of a surface-engraved unglazed thin white porcelain product, which is placed in a roller press.
Detailed Description
The invention is further described below by means of specific embodiments.
The wall thickness of the white porcelain product is 0.5-1mm, the side wall of the white porcelain product is provided with grains which are sunken inwards by 0.1-0.3mm, and the raw material components of a white porcelain blank body are as follows: 30-40 parts of kaolin, 15-20 parts of alumina powder, 10-15 parts of potash feldspar, 10-15 parts of titanium oxide, 5-10 parts of titanium dioxide, 1-5 parts of cryolite, 1-3 parts of graphene, 1-3 parts of sodium tripolyphosphate and 1-5 parts of a release agent, and the white porcelain blank is optimized, and comprises the following raw materials: 38 parts of kaolin, 17 parts of alumina powder, 13 parts of potash feldspar, 14 parts of titanium oxide, 9 parts of titanium dioxide, 4 parts of cryolite, 2 parts of graphene, 1 part of sodium tripolyphosphate and 2 parts of a release agent.
The one-step forming process of making thin glaze-less white porcelain product includes the following steps:
step 1, weighing and mixing raw material components of the white porcelain blank according to the proportion, mixing and ball-milling for 20-30 hours to obtain ceramic blank slurry, wherein the mixing and ball-milling time is as follows: water: the proportion of the balls is 1: 2: 2-3;
step 3, injecting the blank slurry 100 into the die cavity 11, wherein the density of the slurry during grouting is 2.5-3g/cm3The thickening degree is 2.0-2.3g/cm3 ，Water in the mould is absorbed, and the residual slurry is poured out when the cup wall in the mould cavity reaches the required thickness;
step 4, when the water content of the blank is 15-20%, placing the mold into a rolling machine, enabling a rolling head 200 to extend into a mold cavity, enabling an included angle between the center line of the rolling head and the center line of the mold cavity to be 18-20 degrees, rolling the mud blank on the inner wall of the mold cavity, controlling the rolling speed of the rolling head to be 50-60m/min, and conducting acting force of the rolling head in the rolling process to tightly press the mud blank and the relief grains to form grains on the side wall of the white porcelain product;
step 5, demolding after the blank body is dried to obtain a blank body of the white porcelain product;
and 6, putting the blank body of the white porcelain product into a kiln for burning and molding, wherein the burning temperature is 1306-1315 ℃, and the burning time is 18-26 hours. The firing temperature is controlled as follows
In the low temperature rise section, the kiln is preheated from normal temperature to 200 ℃ for 1-2 hours;
in a slow temperature rise section, the temperature of the kiln is quickly raised to 600 ℃ after 3-4 minutes;
in the constant-speed heating section, the temperature of the kiln is rapidly increased to 1100 ℃ for 4-5 hours;
in the heat preservation section, the temperature of the kiln is raised to 1230-1250 ℃ after 2-3 hours, and the heat is preserved for 1-2 hours at 1230 ℃;
in the firing temperature section, the kiln is heated to the firing temperature after 1-2 hours;
performing secondary heat preservation, and restoring the temperature of the kiln to 1230-1250 ℃, and preserving the heat for 1-2 hours;
cooling the temperature reduction section, and cooling to normal temperature after 6-8 hours to obtain the carved glaze-free thin body white porcelain product.
The description of the invention shows that the one-step forming thin body white porcelain product with the carved glaze-free surface and the integral firing process thereof break through the process that the prior thin body porcelain can realize the thin body of the blank only by repeatedly erecting the blank, solve the technical bottleneck that the production efficiency is low and the cost is high, ensure that the raw material of the white porcelain blank has stable fluidity when being changed into slurry, has good plasticity and strong strength, can bear rolling when being rolled, form carved patterns when the saturated water is strong, realize the one-step preparation of the thin body blank with the glaze-free body by the processes of firstly injecting slurry and then rolling, and realize the carved patterns by the rolling and the fitting of the lines in the blank and the depressions in the die cavity, wherein the prepared thin body white porcelain has the lines of only 0.5-1mm, the blank is thin and high in strength, and the wall thickness of the white porcelain product forms the inward depressions of 0.1-0.3mm for the side wall of the white porcelain product, the light is transmitted from the lines when the light irradiates from the inside to the outside, the color shows the transformation effect of brightness and depth, the modeling is elegant and beautiful, and the requirements of practicability and aesthetic quality can be met.
The above description is only a few specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design concept should fall within the scope of the present invention.
Claims (9)
1. The one-step forming surface engraving unglazed thin-body white porcelain product is characterized in that the white porcelain body comprises the following raw material components: 30-40 parts of kaolin, 15-20 parts of alumina powder, 10-15 parts of potash feldspar, 10-15 parts of titanium oxide, 5-10 parts of titanium dioxide, 1-5 parts of cryolite, 1-3 parts of graphene, 1-3 parts of sodium tripolyphosphate and 1-5 parts of a release agent.
2. The one-time forming surface-engraved unglazed thin white porcelain product according to claim 1, wherein the white porcelain body is prepared from the following raw material components: 38 parts of kaolin, 17 parts of alumina powder, 13 parts of potash feldspar, 14 parts of titanium oxide, 9 parts of titanium dioxide, 4 parts of cryolite, 2 parts of graphene, 1 part of sodium tripolyphosphate and 2 parts of a release agent.
3. The one-step forming process of making thin glaze-less white porcelain product includes the following steps:
step 1, weighing and mixing raw material components of the white porcelain blank according to the proportion, mixing and ball-milling for 20-30 hours to obtain ceramic blank slurry, wherein the mixing and ball-milling time is as follows: water: the proportion of the balls is 1: 2: 2-3;
step 2, preparing a die, wherein a die cavity matched with the white porcelain product is arranged in the die, and relief grains are arranged on the cavity wall of the die cavity;
step 3, injecting the blank slurry into a mold, absorbing water in the mold, and pouring out the residual slurry when the cup wall in the mold cavity reaches the required thickness;
step 4, when the water content of the blank is 15-20%, placing the mold into a roller press, extending a rolling head into the mold cavity, rolling the mud blank on the inner wall of the mold cavity, and conducting the acting force of the rolling head in the rolling process to tightly press the mud blank and the embossment grains to form grains on the side wall of the white porcelain product;
step 5, demolding after the blank body is dried to obtain a blank body of the white porcelain product;
and 6, putting the blank body of the white porcelain product into a kiln for burning and molding, wherein the burning temperature is 1306-1315 ℃, and the burning time is 18-26 hours.
4. The one-step forming surface-engraved unglazed thin white porcelain product manufacturing process according to claim 3, characterized in that: the mould comprises an inner mould and an outer mould, wherein the inner mould is provided with a mould cavity, and the outer mould is sleeved outside the inner mould and used for fixing the inner mould.
5. The one-step forming surface-engraved unglazed thin white porcelain product manufacturing process according to claim 4, characterized in that: the inner die comprises a left die and a right die which are symmetrically arranged along the center line of the die cavity.
6. The one-step forming surface-engraved unglazed thin white porcelain product manufacturing process according to claim 3, characterized in that: the density of the slurry during grouting is 2.5-3g/cm3The thickening degree is 2.0-2.3g/cm3。
7. The one-step forming surface-engraved unglazed thin white porcelain product manufacturing process according to claim 3, characterized in that: in the step 4, an included angle between the central line of the rolling head and the central line of the die cavity is 18-20 degrees.
8. The one-step forming surface-engraved unglazed thin white porcelain product manufacturing process according to claim 7, characterized in that: the rolling speed of the rolling head is controlled at 50-60 m/min.
9. The one-step forming surface-engraved unglazed thin white porcelain product manufacturing process according to claim 3, characterized in that: in the step 6, the firing temperature is controlled as follows,
in the low temperature rise section, the kiln is preheated from normal temperature to 200 ℃ for 1-2 hours;
in a slow temperature rise section, the temperature of the kiln is quickly raised to 600 ℃ after 3-4 minutes;
in the constant-speed heating section, the temperature of the kiln is rapidly increased to 1100 ℃ for 4-5 hours;
in the heat preservation section, the temperature of the kiln is raised to 1230-1250 ℃ after 2-3 hours, and the heat is preserved for 1-2 hours at 1230 ℃;
in the firing temperature section, the kiln is heated to the firing temperature after 1-2 hours;
performing secondary heat preservation, and restoring the temperature of the kiln to 1230-1250 ℃, and preserving the heat for 1-2 hours;
cooling the temperature reduction section, and cooling to normal temperature after 6-8 hours to obtain the carved glaze-free thin body white porcelain product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010907042.9A CN111978069A (en) | 2020-09-02 | 2020-09-02 | One-step forming surface carved glaze-free thin white porcelain product and integrated manufacturing process thereof |
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| CN113998987A (en) * | 2021-01-14 | 2022-02-01 | 浙江商业职业技术学院 | Method for manufacturing ceramic artwork |
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