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A technology of dry-press forming and Nixing pottery, applied in ceramic forming machines, manufacturing tools, etc., can solve the problem of uneven density distribution of forming blanks, and achieve the effects of reducing distortion and cracking, improving yield and increasing fluidity.
Inactive Publication Date: 2018-03-23
QINZHOU UNIV
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Abstract
Description
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a method for dry pressing of Nixing pottery, which
Method used
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Examples
Experimental program
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Effect test
Embodiment 1
[0015] 1) Take the east mud and the west mud in a weight ratio of 4:6, mix them, and grind them to 80 mesh to obtain pottery clay powder;
[0016] 2) Add 0.02% by weight of sodium tartrate and 0.01% emulsified silicone oil to the pottery clay powder, add water until the water content is 5%, and mix well to obtain a blank;
[0017] 3) Fill the blank into the metal mold cavity, press it for 10s under the frontal pressure of 15MPa, and obtain the green body of the small teapot (diameter is 25cm, height is 12cm).
Embodiment 2
[0019] 1) Take east mud and west mud in a weight ratio of 1:1, mix them, and grind them to 120 mesh to obtain pottery clay powder;
[0020] 2) Add 0.05% by weight of sodium tartrate and 0.02% emulsified silicone oil to the pottery clay powder, add water until the water content is 10%, and mix well to obtain a blank;
[0021] 3) Fill the blank into the metal mold cavity, and press it for 30s under the frontal pressure of 25MPa to obtain the blank of a medium-sized vase (30cm in diameter and 60cm in height).
Embodiment 3
[0023] 1) Take east mud and west mud and mix them in a weight ratio of 6:4, crush them to 100 mesh, and obtain pottery clay powder;
[0024] 2) Add 0.035% by weight of sodium tartrate and 0.015% emulsified silicone oil to the pottery clay powder, add water until the water content is 8%, and mix well to obtain a blank;
[0025] 3) Fill the blank into the metal mold cavity, and press it for 20s under the frontal pressure of 20MPa to obtain the green body of a large vase (55cm in diameter and 100cm in height).
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Abstract
The invention discloses a dry pressing forming method of Nixing pottery. The dry pressing forming method of the Nixing pottery includes the following steps that (1) east clay and west clay are mixed and crushed to 80-120 meshes, so that clay powder is obtained; (2) 0.02-0.05% by weight of sodium tartrate and 0.01-0.02% of silicone emulsion are added into the argil powder, water is added until thewater content is 5-10%, and a preform body is obtained after uniform mixing; and (3) the preform body is injected into a metal mold cavity and pressed for 10-30 s at the front pressure of 15-25 MPa, and a formed green body is obtained. The small amount of sodium tartrate and silicone emulsion are added into the traditional Nixing pottery clay, the fluidity of the preform body is greatly increased,friction force among clay particles and between the clay and a mold wall is reduced, and therefore the formed green body with uniform density is obtained. As the density of the formed green body is uniform, deformation and cracking are greatly reduced in the subsequent firing process, and the yield is improved.
Description
technical field [0001] The invention relates to a molding method of Nixing pottery, in particular to a dry pressing molding method using Nixing pottery. Background technique [0002] Qinzhou Nixing pottery, Yixing Zisha pottery in Jiangsu, Jianshui pottery in Yunnan, and Rongchang pottery in Sichuan are among the four famous pottery pottery in China, and are well-known both at home and abroad. Nixing pottery is made of the unique east and west clay in Qinzhou area as raw materials, which are made into blanks after weathering, ball milling, pressure filtration, vacuum mud refining, and aging, and then formed, dried, and fired. The molding process of Nixing pottery mainly adopts manual drawing. After entering the semi-mechanized production, new forming methods are introduced, namely drawing forming method, grouting forming method, impression molding method and rolling forming method. Compression molding uses plaster molds, impression molding uses sulfur as a mold, while roll ...
Claims
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Application Information
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