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Ceramic forming slurry and high-pressure forming method

A high-pressure forming and high-pressure forming machine technology, applied in the field of ceramic manufacturing, can solve the problems of low mud viscosity, prominent stratification, insufficient permeability, etc., and achieve the effect of reducing all emptying and eliminating slurry leakage

Inactive Publication Date: 2017-08-18
LIXIL AS SANITARY MFG (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current mud has insufficient permeability, and the grouting time is more than 2200s, resulting in the molding cycle not reaching the expected effect. At the same time, the viscosity of the mud is low, and the delamination phenomenon is prominent

Method used

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  • Ceramic forming slurry and high-pressure forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] 1. Pulping: Mix 76% of raw materials by weight with 24% of water, and grind them into a slurry through a ball of aluminum balls. The ratio of the three materials to balls is: 1:1.1:0.2. The weight percentage is:

[0126]

[0127] The molar ratio of water glass is 1.5.

[0128] 2. Stale: The stale time is 3 days, and the stirring speed is 12 rpm.

[0129] 3. Molding:

[0130] One day before injection into the high-pressure molding machine, the mud needs to be heated to 42°C by means of external circulation heating;

[0131] Inject the slurry into the high pressure molding machine;

[0132] After the mud is injected into the high-pressure molding machine, the mud pressure is controlled at 1Mpa and continuously pressurized for 2000 seconds;

[0133] After the pressurization, the mud discharge starts, the mud discharge pressure is 0.25Mpa, and the mud discharge time is 30 seconds;

[0134] After the mud discharge is completed, it enters the consolidation stage, the ...

Embodiment 2

[0141] 1. Pulping: mix 80% of raw materials by weight with 20% of water, and grind them into slurry through alumina balls. The material-to-ball ratio of the three is: 1:1.2:0.25. The weight percentage is:

[0142]

[0143] The molar ratio of water glass is 3.5.

[0144] 2. Stale: The stale time is 7 days, and the stirring speed is 12 rpm.

[0145] 3. Molding:

[0146] One day before injection into the high-pressure molding machine, the mud needs to be heated to 47°C by means of external circulation heating;

[0147] Inject the slurry into the high pressure molding machine;

[0148] After the mud is injected into the high-pressure molding machine, the mud pressure is controlled at 1.1Mpa and continuously pressurized for 1500 seconds;

[0149] After the pressurization, the mud discharge starts, the mud discharge pressure is 0.15Mpa, and the mud discharge time is 60 seconds;

[0150] After the mud discharge is completed, it enters the consolidation stage, the consolidatio...

Embodiment 3

[0157] 1. Pulping: Mix 78% of raw materials by weight with 22% of water, and grind them into a slurry through a ball of aluminum balls. The material-ball ratio of the three is: 1:1.15:0.225. The weight percentage is:

[0158]

[0159] The molar ratio of water glass is 2.5.

[0160] 2. Stale: The stale time is 5 days, and the stirring speed is 12 rpm.

[0161] 3. Molding:

[0162] One day before injection into the high-pressure molding machine, the mud needs to be heated to 45°C by means of external circulation heating;

[0163] Inject the slurry into the high pressure molding machine;

[0164] After the mud is injected into the high-pressure molding machine, the mud pressure is controlled at 1.15Mpa and continuously pressurized for 1700 seconds;

[0165] After the pressurization, the mud discharge starts, the mud discharge pressure is 0.2Mpa, and the mud discharge time is 45 seconds;

[0166] After the mud discharge is completed, it enters the consolidation stage, the ...

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Abstract

The invention relates ceramic forming slurry which comprises the following components in percentage by mass: 76%-80% of a raw material and 20%-24% of water. The raw material comprises the following components in percentage by weight: 30%-50% of high-aluminum low-shrink low-thermal-expansion calcined kaolin, 10%-20% of ceramic powder, 10%-20% of quartz sand, 20%-40% of ball clay and 0.3%-0.39% of water glass, wherein the molar ratio of the water glass is 1.5-3.5. The thickening degree of the slurry is increased from 50-80 degrees to 70-100 degrees by adding 0.3%-0.39% of water glass, and meanwhile, the viscosity of the slurry is also improved, so that the bonding property among blank bodies is greatly improved, a layering phenomenon, which is likely to happen (for example F-611), at double-sided pulp sucking parts in the prior art is substantially avoided, and the green blank rejection rate is reduced by about 3%; in addition, the permeability is improved, the grouting time is shortened, and the production efficiency is increased.

Description

technical field [0001] The invention relates to ceramic manufacturing technology, in particular to a mud for ceramic molding and a high-pressure molding method. Background technique [0002] The traditional ceramic production process uses low-pressure molding plaster molds. This production method has the disadvantages of high labor intensity, long grouting time, and high labor costs. In order to improve production efficiency and solve such problems, we have introduced high-pressure molding equipment. [0003] High-pressure grouting molding is a new process completely different from ordinary gypsum molding. Higher grouting pressure (>1Mpa) is used to complete rapid molding, which greatly shortens the molding cycle. At the same time, the degree of automation has a qualitative leap, and labor costs are greatly reduced. . [0004] However, the current mud has insufficient permeability, and the grouting time is more than 2200s, which leads to the failure of the molding cycle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/28C04B33/22C04B33/13
Inventor 韩国幸陈国林谢生林
Owner LIXIL AS SANITARY MFG (SHANGHAI) CO LTD
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