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A kind of 3D printing ceramic slurry applied to casting core and preparation method thereof

A 3D printing and ceramic slurry technology, which is applied in the field of materials, can solve the problems of printing complex casting cores, etc., and achieve good development prospects, reduce settlement, and prolong shelf life.

Active Publication Date: 2021-01-29
深圳市光韵达增材制造研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a 3D printing ceramic slurry applied to casting cores, aiming to solve the problem of providing a ceramic slurry suitable for 3D printing of casting cores to meet the needs of printing complex casting cores

Method used

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  • A kind of 3D printing ceramic slurry applied to casting core and preparation method thereof

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preparation example Construction

[0020] The embodiment of the present invention also provides a method for preparing a 3D printing ceramic slurry applied to a casting core, comprising the following steps:

[0021] According to the above formula of 3D printing ceramic slurry applied to the casting core, weigh each raw material for later use; put the resin, dispersant, photoinitiator, UV stabilizer and rheological additive into the reaction container and perform ball milling until the components Completely dissolve; then add the core powder, and ball mill for 1-3 hours at a speed of 200-240r / min, collect the ball-milled material and let it stand to obtain the 3D printing ceramic slurry applied to the casting core .

[0022] In the embodiment of the present invention, the step of putting the resin, dispersant, photoinitiator, ultraviolet stabilizer and rheological additive into the reaction vessel for ball milling until each component is completely dissolved, specifically includes: putting the resin, dispersant ...

Embodiment 1

[0027] Weigh 30g of 3,5-official aliphatic urethane acrylate, 78g of trimethylolpropane triacrylate in a 1L ball mill jar with 1kg of ground zirconium balls, then add 14g of BYK-163 (dispersant ) and 10g of photoinitiator TPO, 2g of UV stabilizer (Eversorb UR-210), ball milling at 160r / min, adding 0.37g of rheological additive 6900, and ball milling for 0.5h. After each component is completely dissolved, add 200g core powder into the ball mill jar. And after 2 hours of ball milling at a rotational speed of 240r / min, the 3D printing ceramic slurry applied to the casting core was collected, and the slurry could be directly used for printing on a light-curing printer. After testing, the viscosity of the slurry is 1.3pa.s, which can meet the printing requirements. After 15 days at room temperature, the slurry has no obvious settlement phenomenon.

Embodiment 2

[0029] The epoxy aliphatic urethane acrylate that takes by weighing 60g, the hexanediol diacrylate of 40g are housed in the 1L ball mill jar of 1kg grinding zirconium ball, then add the Disponer-9850 (dispersing agent) of 15g and 7g wherein Photoinitiator 907, 1g UV stabilizer Eversorb UR-220, 0.5g rheological additive KYC-426 ball milled at 160r / min, ball milled for 0.5h. After each component is completely dissolved, add 320g core powder in the ball mill jar. And after 3 hours of ball milling at a rotational speed of 230r / min, the 3D printing ceramic slurry applied to the casting core was collected, and the slurry could be directly used for printing on a light-curing printer. After testing, the viscosity of the slurry is 4.3pa.s, which can meet the printing requirements, and there is no obvious settlement phenomenon after being placed at room temperature for 15 days.

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Abstract

The invention is applicable to the field of material technology, and provides a 3D printing ceramic slurry applied to casting cores and a preparation method thereof. The slurry is composed of resin, core powder, dispersant, photoinitiator, ultraviolet stabilizer and fluid It is compounded with variable additives. By adding a UV stabilizer, the stress distribution in the green body can be well controlled, greatly reducing the risk of cracking during the degreasing process, and ensuring the quality of ceramic printed products; and the dispersant and rheological additive have a synergistic effect and jointly control the slurry system Adding rheological additives can form a three-dimensional network structure in the slurry to prevent large particles from sinking, and with the auxiliary effect of dispersant, the long chain of dispersant can be wrapped on the surface of particles to increase the combination with resin to reduce sedimentation. The settling performance of the slurry is obviously improved, and the shelf life of the slurry is prolonged, and the slurry can be applied to 3D printing of casting cores to produce complex three-dimensional structural core parts.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a 3D printing ceramic slurry applied to a casting core and a preparation method thereof. Background technique [0002] As an emerging technology, ceramic 3D printing technology has the advantage that it is not limited by molds and can directly form more complex structures. It has high production efficiency in small batches, short production cycle and low cost, so it can be widely used in the production and preparation of casting cores. . Among them, SLA (Stereo Lithography Apparatus, stereolithography 3D printing technology) is currently the mainstream and most widely used ceramic 3D printing technology. Compared with other methods such as SLS (Selective Laser Sintering, Selective Laser Sintering, ), DLP (Digital Light Processing, digital light processing), etc. have great advantages in molding quality and molding size limitation. [0003] Casting cores are common...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00B22C1/02B22C9/10B33Y70/10
CPCB22C1/00B22C1/02B22C9/10B33Y70/00
Inventor 顾成言陆青肖华军肖坦
Owner 深圳市光韵达增材制造研究院