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Kaolin slurry for stereolithography apparatus and preparation method thereof

A technology of light-curing molding and kaolin, which is applied in the field of additive manufacturing, can solve the problems that kaolin light-curing slurry has not been reported, and achieve the effects of low cost, low viscosity and good stability

Inactive Publication Date: 2019-06-25
ANHUI JINYAN GAOLING SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the preparation of ceramic slurry for photocuring molding mainly focuses on advanced ceramics such as alumina and zirconia, but there is no report on kaolin photocuring slurry.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0025] According to another aspect of the present invention, there is also provided a method for preparing kaolin slurry for photocuring molding, which is characterized in that it includes the following steps:

[0026] S1. Carry out pretreatment to ceramic powder (calcined coal series kaolin powder);

[0027] S2. dissolving the dispersant in the photosensitive resin, and mixing to obtain a photosensitive premix;

[0028] S3. Evenly mix the ceramic powder treated in S1 with the photosensitive premix liquid configured in S2;

[0029] S4. Degassing the mixture obtained in S3 to obtain a ceramic slurry with a viscosity meeting the requirement.

[0030] The pretreatment in the step S1 includes one or more steps of ball milling, powder mixing, powder calcination, powder drying, powder surface treatment, and powder sieving.

[0031] The mixing method in the step S2 is one or more of ultrasonic dispersion, magnetic stirring, mechanical stirring, and high-shear stirring.

[0032] Th...

Embodiment 1

[0036] (1) Treatment of ceramic powder

[0037] After the calcined coal-based kaolin powder is dried in an oven at 80° C. for 24 hours, a dried kaolin powder is obtained.

[0038] (2) Preparation of photosensitive premix

[0039] Measure 59.5mL of acrylate resin and 0.5mL of oleic acid into a beaker, add a magnet for magnetic stirring for 10min to obtain a photosensitive premix.

[0040] (3) Slurry preparation

[0041] Use a balance to measure 104g (corresponding to a volume of 40mL) of the dry kaolin powder obtained in step (1), and perform ball milling and mixing with the photosensitive premix solution obtained in step (2). The ball milling speed is 400r / min, and the ball milling time is 8h.

[0042] (4) Slurry post-treatment

[0043] After the kaolin slurry obtained in step (3) is subjected to vacuum degassing treatment, a kaolin light-cured slurry with a solid phase content of 40 vol% is obtained.

[0044] The kaolin slurry is put into a light-curing molding machine fo...

Embodiment 2

[0046] (1) Treatment of ceramic powder

[0047]The calcined coal-based kaolin powder is ground, passed through a 200-mesh standard sieve, and dried in an oven at 110° C. for 12 hours to obtain dry kaolin powder.

[0048] (2) Preparation of photosensitive premix

[0049] Measure 38mL of acrylate resin and 2mL of polyethylene glycol into a beaker, add a magnet and stir magnetically for 15 minutes to obtain a photosensitive premix.

[0050] (3) Slurry preparation

[0051] Use a balance to measure 143g (corresponding to a volume of 55mL) of the dry kaolin powder obtained in step (1), and perform ball milling and mixing with the photosensitive premix solution obtained in step (2). The ball milling speed is 200r / min, and the ball milling time is 12h.

[0052] (4) Slurry post-treatment

[0053] After the kaolin slurry obtained in step (3) is subjected to vacuum degassing treatment, a kaolin light-cured slurry with a solid content of 55 vol% is obtained.

[0054] The kaolin slurry...

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Abstract

Belonging to the field of additive manufacturing, the invention discloses a kaolin slurry for stereolithography apparatus and a preparation method thereof. The kaolin slurry consists of the followingcomponents by mass percentage: 40%-55% of kaolin powder, 45%-60% of photosensitive resin and 0.4%-2% of a dispersant. The preparation method of the kaolin slurry includes: (a) selecting calcined coal-series kaolin powder, the dispersant and photosensitive resin as the raw materials, pretreating the kaolin powder to obtain dry powder, dissolving the dispersant in the photosensitive resin to obtaina photosensitive premixed solution; and (b) dissolving the dry powder in the photosensitive premixed solution, performing ball milling and mixing the substances evenly, and then conducting vacuum degassing to obtain the needed kaolin slurry. According to the invention, the obtained slurry has high solid content and good stability, can be stored for a long term without deterioration after preparation, can be used for manufacturing complex and fine ceramic parts, and has good application prospects in automobiles, chemical industry, sewage treatment and other industries.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a kaolin slurry for photocuring molding and a preparation method thereof. Background technique [0002] Coal-measure kaolin is a by-product produced in the process of coal mining and washing. With the rapid development of the coal industry, the amount of coal-measure kaolin produced is increasing and piled up continuously. However, the deep processing level of coal-measure kaolin products in China is relatively lagging behind. The economic benefit is not high, which makes the utilization rate of coal series kaolin low and becomes one of the largest industrial solid wastes. The accumulation of abandoned coal-measure kaolin not only seriously encroaches on agricultural land, forestry land, residential areas, etc., but also the soluble salts and heavy metals it decomposes will penetrate into the soil along with the flow of water, seriously polluting the land and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13B33Y70/00
Inventor 吴甲民陈双史玉升陈舒怡刘荣臻李晨辉文世峰张矿崔等王永均
Owner ANHUI JINYAN GAOLING SCI & TECH CO LTD
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