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Three-dimensional printing variable-filling method based on contour features

A technology of three-dimensional printing and filling method, which is applied in the direction of additive manufacturing, 3D object support structure, processing data acquisition/processing, etc. It can solve the problems that the strength cannot be guaranteed and prolong the printing time of the model, so as to ensure the structural strength of the model and reduce the size of the model. The effect of molding time

Active Publication Date: 2018-12-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The printing method of the same filling type and filling rate is suitable for models with simple structures and no strength requirements, but for some models with local strength requirements, using a lower filling rate may make the strength of some detailed structures unable to be guaranteed. If a higher filling rate is used, although the strength can be improved, it will greatly prolong the overall printing time of the model

Method used

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  • Three-dimensional printing variable-filling method based on contour features
  • Three-dimensional printing variable-filling method based on contour features
  • Three-dimensional printing variable-filling method based on contour features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Embodiment 1 is an embodiment of the slender area, the filling rate of the solid filling area is set to 10%, the filling rate of the extended area of ​​the slender area is 60%, and the length threshold of the cross-scanning line algorithm is L 阈 is 4 mm, the area threshold S of the small area area 阈 is 25 square millimeters, and the small-area expansion area is constructed on the sample group at the same time to obtain the multi-slice layer expansion area of ​​the small-area area. After slicing, the simulation results of the 15th layer of the sample group are shown in Figure 9(a). The printed sample of the 15th layer of the sample group is shown in Figure 9(b).

Embodiment 2

[0104] Embodiment 2 is an embodiment of a sudden change region. The contour of the sample slice layer is a quadrilateral containing four vertices. If the convex vertex is an acute angle, then the position of the vertex is constructed with a sudden change region. The simulation diagram of the 22nd slice layer of the model is as follows Figure 10 As shown, the printed object of the 22nd slice layer of the model, such as Figure 10 shown.

Embodiment 3

[0106] Embodiment 3 is an embodiment of a small-area area, the number of projection layers is set to 4, and the length threshold L 阈 is 4 mm, the area threshold S of the small area area 阈 It is 25 square millimeters, the solid filling rate is 10%, and the non-solid filling rate is 100%. Print the animal dog entity and minion entity, and stop printing after printing to the corresponding slice layer to get the actual printing effect of the filled area. The animal dog simulation model is shown in Figure 11(a), and the minion simulation model is shown in Figure 11(b). Figure 12(a) shows the 60th slice layer of Animal Dog, the 64th slice layer of Animal Dog is shown in Figure 12(b), and the 83rd slice layer of Animal Dog is shown in Figure 12(c). Figure 13(a) shows the 20th slice layer of the Minions, the 26th slice layer of the Minions is shown in Figure 13(b), and the 30th slice layer of the Minions is shown in Figure 13(c) , the minion's 26th unprocessed slice layer is shown ...

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Abstract

The invention discloses a three-dimensional printing variable-filling method based on contour features. The method comprises the following steps of establishing a three-dimensional model in an STL format; importing the three-dimensional model into slicing software and carrying out layered slicing on the three-dimensional model through the slicing software to form the section contour information ofeach layer of the three-dimensional model; dividing a slicing layer filling area into a solid filling area adopting low-filling-rate printing and a non-solid filling area adopting high-filling-rate printing, and setting the parameter value of the non-solid filling area of the model; traversing the slicing area of each layer step by step and layer by layer, and judging whether a non-solid fillingarea exists in the slicing area of each layer or not; if yes, constructing the non-solid filling areas according to types according to the contour features of the slicing areas, and forming a master non-solid filling area in a combined mode; printing the constructed master non-solid filling area layer by layer with a high filling rate, and printing the solid filling areas with a low filling rate.By means of the three-dimensional printing variable-filling method based on the contour features, the forming time is effectively shortened, and the structure strength is ensured.

Description

technical field [0001] The invention relates to a model printing method of a three-dimensional printing model, in particular to a three-dimensional printing variable filling method based on contour features. Background technique [0002] Three-dimensional printing technology is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Technical material printer to achieve. At present, 3D printing technology has been widely used in mold manufacturing, industrial design and other fields. [0003] Fused deposition modeling (FDM) 3D printing technology is based on injection technology, which sprays molten materials from nozzles and accumulates them layer by layer according to a certain path. The slicing software is the core of the 3D printing system to process the model. It is responsible for the data processing before the printing of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/386B33Y10/00B33Y50/00
CPCB29C64/118B29C64/386B33Y10/00B33Y50/00
Inventor 戴敏余可胡玉波张志胜
Owner SOUTHEAST UNIV
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