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3D printing method

A technology for 3D printing and printing tasks, applied in the field of 3D printing systems, can solve the problems of inability to realize mixed processing of multiple materials, low one-time use rate of material and liquid, and too much material and liquid.

Inactive Publication Date: 2019-08-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantages of this biological tissue molding method are: 1. Whether it is DLP or extrusion, multiple materials cannot be used to cooperate to complete the task of forming a biological tissue, so the mixed processing of multiple materials cannot be realized.
The active organism is a heterogeneous mixed system containing multiple structures and various material components, and the above-mentioned method cannot complete the formation of the heterogeneous mixed system.
2. The feeding and molding speed of DLP is fast, but there is a lot of wasted material liquid, and the one-time use rate of material liquid is low
However, some of them exhibit poor mechanical properties or slow gel times, limiting their application in DLP-based 3D printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0223] Example 1: 3D printed skin for injury repair

[0224] For example Figure 10 , 11 As shown in 12 and 13, the printed material is first modeled, and then the model is programmed and then printed. For example, the model established as Figure 10 and 12 as shown, Figure 10 For the leather model, Figure 12 Combine the epidermis and dermis. Figure 11 It is a schematic diagram of the printing process taking 3 layers as an example. For example, the black one represents the bracket that needs to be printed, which is similar to the structure of a three-dimensional cube, and the 12 sides of the bracket use the printed bracket, and the bracket forms a hollowed-out three-dimensional structure 102, forming a unit for printing the bracket, multiple The combination of elements forms a porous structure in the form of cantilever beams. The whole unit can form a dermal support of any size, for example, the diameter can be 8 mm, the thickness of the epidermis is 1 mm, and the...

Embodiment 2

[0236] Example 2: 3D printing cartilage repair

[0237] For example figure 1 , 18 As shown, the printed material is modeled first, and then the program is controlled according to the established model, and then printed. For example, the model established as figure 1 and 18 as shown, Figure 18 It is a model of a cartilage support, which includes an upper support 901 and a lower support 902, wherein the upper support has 30 round holes 900, and the side also has 30 round holes 903, and each round hole crosses the same, for example, each of the above round holes 900 and the side The circular holes 903 are connected, for example figure 1 can be seen. The diameter of the stent is 4 mm, the thickness of the upper layer is 1 mm, and the thickness of the lower layer is 2 mm. In fact also have corresponding 30 holes in the lower layer and the same as the 30 holes of the upper layer, and next time there are no side holes.

[0238] This design is to use the scaffold for car...

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Abstract

The invention provides a 3D printing method. The 3D printing method comprises the steps of (1) preparing a 3D printing system and feed liquid, inputting a printing task, filling the feed liquid into acharging barrel fulfilling a feeding task and mounting the charging barrel in place; (2) descending a lifting platform by a layer thickness in a cavity; (3) feeding the feed liquid into the cavity through the charging barrel to enable the feed liquid to be filled into the space defined by the lifting platform and the cavity; and (4) driving an optical system to solidify the feed liquid, wherein an optical imaging system adopting the DLP technology is adopted as the optical system, the contour of an exposure area of the optical system is the same as each layer of the contour to be formed, theexposure area is irradiated onto the feed liquid, the feed liquid is solidified, and in an unirradiated area, the feed liquid still remains liquid. Through the 3D printing method provided by the invention, alternate feeding of multiple materials can be achieved, and a non-uniform mixing system can be realized.

Description

technical field [0001] The present invention relates to a 3D printing system, as well as biological materials used for printing. Background technique [0002] It is well known that there is a large clinical need for engineered tissues due to the shortage of donor tissues and organs. Although many approaches have been tried to fabricate engineered tissues, such as electrospinning, extrusion 3D printing and textile techniques. But they can only produce relatively simple three-dimensional structures, which cannot meet the needs of clinical applications. Therefore, there is an urgent need to fabricate complex and layered tissue constructs with high resolution for clinical use. Recently, digital light processing (DLP)-based 3D printing technology has been used to fabricate complex 3D microstructures with high printing speed, microscale resolution, thick vertical structures, and strong interlayer bonding properties. It can simulate the precise geometry of native tissue to creat...

Claims

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Application Information

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IPC IPC(8): B29C64/106B29C64/20B29C64/321B29C64/30B33Y10/00B33Y30/00B33Y40/00
CPCB29C64/106B29C64/20B29C64/30B29C64/321B33Y10/00B33Y30/00B33Y40/00
Inventor 欧阳宏伟洪逸周飞飞章淑芳
Owner ZHEJIANG UNIV