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Photocuring 3D printing equipment and printing method applicable to space environment

A 3D printing and space environment technology, applied in the field of 3D printing, can solve the problems of high viscosity ink, difficulty in printing, sacrificing printing efficiency and printing time, and achieve the effect of overcoming the requirement of high viscosity

Active Publication Date: 2020-09-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high viscosity ink is very viscous, it is difficult to print, and it needs a lot of jetting force to jet, which will sacrifice printing efficiency and printing time

Method used

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  • Photocuring 3D printing equipment and printing method applicable to space environment
  • Photocuring 3D printing equipment and printing method applicable to space environment
  • Photocuring 3D printing equipment and printing method applicable to space environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 3

[0067] Example 1 Space printing of three-dimensional in vitro tumor models

[0068] This embodiment proposes a space printing method for a three-dimensional in vitro tumor model, which includes the following steps:

[0069] ·Preparation of photosensitive bioink

[0070] A certain amount of gelatin-methacrylic acid (GelMA) powder (self-made) was dissolved in physiological saline, heated at 70°C for 3 hours until the GelMA powder was completely dissolved, and a 0.05 g / ml GelMA solution was prepared. Then add 0.005g / ml photoinitiator (I2959, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, 106797-53-9, Yingli, China) powder dissolved in 0.1 g / ml GelMA solution to make GelMA bioink.

[0071] The lung tumor cells (A549) to be printed were digested, counted, centrifuged, and re-suspended with GelMA bio-ink to obtain 4*10 6 / ml of cell-containing GelMA bioink.

[0072] ·Printing and crosslinking

[0073] Perform plasma cleaning and hydrophilic treatment on the forming bottom...

Embodiment 2

[0074] Embodiment 2 adopts the space printing of the three-dimensional solid model of another kind of photosensitive ink

[0075] Compared with Embodiment 1, this embodiment differs in that the composition of the photosensitive ink in this embodiment is different.

[0076] specific,

[0077] ·Preparation of bio-ink

[0078]A certain quality of poly(ethylene glycol) diacrylate (PEGDA, manufacturer Sigma, molecular weight 700) powder is dissolved in deionized water, and the mass-volume ratio of poly(ethylene glycol) diacrylate is 20% (it can be in the range of 5~ 30% range to select), to make 0.2g / ml PEGDA solution. Then add 0.005g / ml photoinitiator (I2959, 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, 106797-53-9, Yingli, China) powder dissolved in 0.1 g / ml PEGDA solution to make PEGDA photosensitive ink.

[0079] ·Printing and crosslinking

[0080] Add the photosensitive ink obtained in the above steps into the forming chamber, and install and connect each structur...

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Abstract

The embodiment of the invention relates to photocuring 3D printing equipment and printing method applicable to a space environment. The 3D printing equipment comprises a driving component, a connector, a forming bottom plate, a forming chamber and an optical pattern generating device; the forming chamber comprises a forming chamber shell body and a forming chamber door; the forming chamber door isconnected with the opening of the forming chamber shall body in an openable mode and can form a forming chamber containing space with the forming chamber shell body in an enclosing mode; the formingchamber door is made of transparent materials; the forming bottom plate is arranged inside the forming chamber containing space; a forming surface of the forming bottom plate is arranged opposite to the inner surface of the forming chamber door; the driving component drives the forming bottom plate to be close to or away from the forming chamber door through the connector; and the optical patterngenerating device and the forming chamber door are oppositely arranged on the outer side of the forming chamber. According to the embodiment of the invention, through the design of a sealed forming chamber, the requirement of a zero-gravity environment for high viscosity of printing ink is overcome, so many photosensitive inks which are commonly used on earth can also be used in space.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a light-curing 3D printing device and a printing method suitable for a space environment. Background technique [0002] With the advent of the 21st century, the pace of human exploration of space is gradually accelerating, but the cost of sending parts to space is extremely expensive. If you can use a 3D printer to print the required parts or items in the space station or spacecraft according to the needs of subsequent use, it will effectively reduce the cost of space experiments and maintenance. [0003] However, the space environment is different from that of the earth. Due to the influence of the weightless environment in space, it is difficult for the traditional light-curing 3D printing method to accurately print the original design shape in space, and there will be problems such as poor adhesion of printing ink, layer peeling or falling off. In particular, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/124B29C64/20B33Y10/00B33Y30/00B33Y70/00
CPCB29K2089/00B33Y10/00B33Y30/00B33Y70/00B29C64/124B29C64/20
Inventor 赵雨孙伟徐圆圆
Owner TSINGHUA UNIV
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