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Hydrogel biological 3D printing path planning method based on model boundary information

A 3D printing and printing path technology, applied in the field of 3D printing, can solve the problems of uneven overall stress distribution, poor self-support, and inapplicability, and achieve the effect of improving overall continuity, improving model accuracy, and reducing quantity

Active Publication Date: 2021-05-25
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

There are the following problems: the self-supporting property of the hydrogel material is poor, the overall stress distribution is uneven, it is difficult to carry the filling method of too many path filling methods, and the influence of the model scanning angle on the printing result cannot be considered, and it is not suitable for hydrogel Glue bio 3D printing field

Method used

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  • Hydrogel biological 3D printing path planning method based on model boundary information
  • Hydrogel biological 3D printing path planning method based on model boundary information
  • Hydrogel biological 3D printing path planning method based on model boundary information

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.

[0034] In this embodiment, the auricle STL model is selected as a calculation example, and the software matlabR2016a is used for realization. The specific steps of the method are as follows:

[0035] Step 1: Use matlab software to read the STL model of the auricle and slice it. like figure 2 Slice images of the pinna STL model are shown in the figure. Computes the number of scanline intersections with the contour. In order to improve the self-supporting and strength of the printed structure, the orthogonal parallel filling is selected as the generation method of the printing path, so that the parallel filling lines between adjacent layers are perpendicular to each other. image 3 It is a line chart of the relationship between the number of intersection points of the scanning lines and the scanning angle of the auricle model. Amon...

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Abstract

The invention discloses a hydrogel biological 3D printing path planning method based on model boundary information, belongs to the field of 3D printing, and relates to a method for planning a 3D printing path of a model by utilizing biological organ model slice boundary information. The method comprises the following steps: slicing a biological model, acquiring intersection point number information of scanning lines at different angles and a model contour by utilizing an exhaustion method, and selecting the angle with the minimum intersection point number as a model scanning angle; controlling the number of corners by fulling utilizing the boundary contour information of the biological model slice, reducing the truncation points of the path, and controlling the overall continuity of the printing path; and determining a reasonable value range of the corners, and planning a printing path suitable for hydrogel biological 3D printing. According to the method, the boundary information of the biological organ model slice is fully utilized, and the number of intersection points of the scanning line and the contour and the number of truncation points of the path are reduced. The overall continuity of the path is improved, and the model precision is improved.

Description

technical field [0001] The invention belongs to the field of 3D printing, and relates to a method for planning a 3D printing path of a model by using slice boundary information of a biological organ model. Background technique [0002] In clinical medicine, the failure or defect of some patients' organs can only be cured by organ transplantation, and the current shortage of organs is a big problem for clinicians and patients. Biological tissue engineering is a discipline born to solve this problem. Japanese scholar Nakumura first proposed the concept of 3D bioprinting, the core concept of which is to directly print biomaterials loaded with cells to form scaffolds, and the loaded materials are usually hydrogels. At present, there are few studies on hydrogel bioprinting, and there is a lack of systematic path planning methods. The traditional 3D printing path planning method, such as "A Contour-based 3D Printing Path Planning Method for Functionally Gradient Materials" inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/106B29C64/386B29C64/393B33Y10/00B33Y50/00B33Y50/02
CPCB29C64/106B29C64/386B29C64/393B33Y10/00B33Y50/00B33Y50/02
Inventor 赵丹阳杨云博李红霞张诚
Owner DALIAN UNIV OF TECH