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3D printing method and device for hierarchical porous material

A porous material and 3D printing technology, applied in the direction of additive processing of mixtures of solid materials and liquid materials, manufacturing auxiliary devices, 3D object support structures, etc., can solve problems such as difficult to meet performance requirements, and achieve general-purpose strong, method simple effect

Active Publication Date: 2017-07-07
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the porous structures currently manufactured, the pore sizes are mostly random or uniformly distributed, which is difficult to meet our requirements for related performance under specific conditions.

Method used

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  • 3D printing method and device for hierarchical porous material
  • 3D printing method and device for hierarchical porous material
  • 3D printing method and device for hierarchical porous material

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Embodiment Construction

[0029] In this embodiment, iodine particles with a sublimation temperature of 77° C. are used as pore-forming particles, a photosensitive resin with a viscosity of 2000 CPS (20° C.) is used as a matrix material, the diameter of the printing hole is 50 μm-400 μm, and the height of the printed part is 10 mm.

[0030] Step 1: Use 3D modeling software (such as SolidWorks) to establish a solid model, export the STL file to the slicing software, and after data analysis of the system, generate the movement data of the scraper 9, the material box 2 along the X axis, and the feeding platform 5. The platform 3 moves data along the Z axis, the image information of the digital mask photocuring system 10, and the exposure time t.

[0031] Step 2: Add iodine particles with a relatively uniform particle size distribution gradient to the feeding platform 5, apply external vibration at a certain amplitude and frequency for 30 minutes, so that the particles are layered in an orderly manner in the hei...

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Abstract

The invention discloses a 3D printing method and device for a hierarchical porous material. The patent is based on a brazil-nut effect, namely, particle mixtures in various sizes are placed in a container, an external force is applied to the container to oscillate the particle mixtures, particles with large sizes can float up while small particles can sink, and therefore, graded distribution in the height direction is implemented. On the basis of the effect, an oscillating device is added in a 3D printing process of a power bed. The 3D printing method comprises the following steps: before pavement of materials, orderly layering pore forming particles by oscillation according to sizes; after every layer of pore forming particles is paved, paving a corresponding layer of liquid photosensitive resin materials on the layer of pore forming particles; carrying out selective photocuring by using a digital mask technology; carrying out layer-by-layer stacking and curing molding; and removing the pore forming particles by aftertreatment technologies including heating or dissolving and the like to form the hierarchical porous material. The aperture size of the porous material obtained by the method is orderly changed in the layer thickness direction, gradient mechanical and acoustical properties can be generated, and the hierarchical porous material is used in fields of artificial biological tissue scaffolds, sound absorption materials, cushioning materials and the like.

Description

Technical field [0001] The invention belongs to the field of rapid prototyping and digital manufacturing, and specifically relates to a 3D printing method and device for layered porous materials. Background technique [0002] As a typical biological structural material, porous structural materials are commonly found in nature, such as trees, rocks, butterfly wings, bones and honeycombs. The porous structure reduces the weight of the structure, and at the same time exerts irreplaceable load-bearing and multifunctional characteristics. For example, the porous structure of the butterfly wing can effectively increase the light capture efficiency of the material, the porous structure of the bone can improve the strength and impact resistance of the bone, and the porous structure of the honeycomb allows the honeycomb to have natural sound absorption capabilities. Therefore, the porous structure has important research and application value in many fields such as aerospace, man-made sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/165B29C64/30B29C64/321B29C64/386B33Y30/00B33Y40/00B33Y50/00
CPCB33Y30/00B33Y40/00B33Y50/00
Inventor 李冰倩任露泉刘庆萍刘慧力张宝玉周雪莉宋正义刘清荣李卓识王振国
Owner JILIN UNIV
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