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Shape prediction method of extrusion type 3D printing bio-ink extrusion filament

A bio-ink, 3D printing technology, applied in 3D modeling, geometric CAD, image data processing, etc., can solve the problem of lack of extrusion 3D printing bio-ink extrusion filament shape prediction method, etc., and achieve high prediction accuracy. , high consistency effect

Pending Publication Date: 2021-10-26
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a solution to the lack of a complete extrusion method that solves the difficulty of predicting the shape of bio-ink extrusion filaments due to the numerous factors that affect the shape of bio-ink extrusion filaments and the dynamic prediction requirements. 3D Printing Bioink Extruded Filament Shape Prediction Method Problems Extrusion 3D Printing Bioink Extruded Filament Shape Prediction Method

Method used

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  • Shape prediction method of extrusion type 3D printing bio-ink extrusion filament
  • Shape prediction method of extrusion type 3D printing bio-ink extrusion filament
  • Shape prediction method of extrusion type 3D printing bio-ink extrusion filament

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

[0050] Such as figure 1 As shown, the shape prediction method of the extruded 3D printing bio-ink extruded filament of the application is used to predict the shape of a certain cellulose bio-ink extruded filament, and its specific implementation steps are as follows:

[0051] S1. Bioink modeling to be predicted, such as figure 2 As shown, the specific steps are:

[0052] S101. Determine the fluid model type of the bio-ink;

[0053] Based on the following three reasons:

[0054] Reason 1: In the extrusion 3D printing process, the pressure on the bio-ink is stable, so it is an incompressible fluid;

[0055] Reason 2: The printing process is carried out at room temperature without heating or cooling, and the entire printing process can be regarded as an adiabatic process, so...

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Abstract

The invention discloses a shape prediction method for extrusion type 3D printing bio-ink extrusion filaments, and the method comprises the following steps: S1, modeling bio-ink to be predicted, and determining and obtaining three material characteristic parameters for constructing a bio-ink model, namely the density rho b of the bio-ink, the surface tension coefficient sigma of the bio-ink and the viscosity mu b of the bio-ink; s2, performing modeling on the basis of an OpenFOAM extrusion type 3D printing process, the modeling being realized through three steps of constructing a geometric model of an extrusion type 3D printer extrusion device, dividing grids and determining boundary conditions in sequence; s3, performing numerical simulation solution on the model constructed in the step S2 by using a fluid volume method; and S4, performing post-processing on the simulation result by using ParaView, and drawing a boundary between the bio-ink and air at different moments to obtain a prediction result of the shape of the extruded filament of the bio-ink. The method is high in prediction result precision, has higher consistency compared with an actual result, and is reasonable and effective.

Description

technical field [0001] The invention relates to the technical process analysis field of bio-ink in extrusion 3D printing, in particular to a shape prediction method of extrusion-type 3D printing bio-ink extrusion filaments. Background technique [0002] Bioink refers to a mixture gel containing biological components or biomaterials. In recent years, as a representative of bio-ink, cellulose bio-ink is prepared from plant components. It has the advantages of low price, non-toxic and harmless, sustainable, sufficient source and good mechanical properties. It has become widely used in medical and industrial fields. The application of green materials has attracted great attention in the research of material preparation and printing process of bio-ink. Extrusion 3D printing technology is to use the piston to squeeze the bio-ink in the needle tube at room temperature to extrude the extruded filaments formed in the air through the nozzles, and move the nozzles through the three-ax...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06F30/20G06F30/10B29C64/386B33Y50/00G06F113/10
CPCG06T17/00G06F30/20G06F30/10B29C64/386B33Y50/00G06F2113/10
Inventor 蔡庆中涂勇强杨功流
Owner BEIHANG UNIV
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