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Method of determining layer thicknesses of 3D models for additive manufacturing

A technology of additive manufacturing and layer thickness, applied in 3D modeling, manufacturing auxiliary devices, applications, etc., can solve the problems of reducing printing time, adaptive slicing method cannot flexibly apply dental 3D models, etc., and achieve the goal of reducing printing duration Effects of prolonging or shortening printing duration and reducing printing accuracy

Pending Publication Date: 2021-08-13
DENTSPLY SIRONA INC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adaptive slicing methods cannot be flexibly applied to such dental 3D models to allow further reduction of printing time without degrading the overall printing quality.

Method used

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  • Method of determining layer thicknesses of 3D models for additive manufacturing
  • Method of determining layer thicknesses of 3D models for additive manufacturing
  • Method of determining layer thicknesses of 3D models for additive manufacturing

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Embodiment Construction

[0033]The invention provides a method of determining the layer thickness (t) for a three-dimensional model (1) produced by additive manufacturing equipment. The method comprises the step of determining the layer thickness (t) according to an adaptive slicing algorithm, wherein the layer (2) is calculated by a relationship based on the slope of the normal vector (n) of the surface element (s) of the 3D model (1) The thickness of the surface element (s) of the 3D model (1) at least partially encloses the layer (2) from the horizontal direction (x; y). Figure 3 shows a sphere as a comparative example of a 3D model (1) whose layer thickness (t) has been determined according to said adaptive slicing algorithm known in the prior art.

[0034] The method of the invention also includes the step of selectively imposing on at least one surface element of the 3D model (1) a precision requirement selected from one or more selectable different precision requirements, one or more Selectabl...

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Abstract

The present invention relates to a method of determining layer thicknesses (t) of a three- dimensional model (1) for generation with an additive manufacturing apparatus, the method comprising: a step of determining the layer thicknesses (t) according to an adaptive slicing algorithm in which the thickness of a layer (2) is calculated through a relation based on the inclination of the normal vectors (n) of the surface elements (s) of the 3D model (1) which at least partly enclose the layer (2) from a horizontal direction (x;y), the method being characterized by further comprising: a step of selectively imposing on at least one surface element (s) of the 3D model (1) a precision requirement out of one or more selectable different precision requirements which respectively differently alter in the determination step the relation with respect to the inclination of the normal vector (n) of the said at least one surface element (s) which allows, through the altered relation, the layer thickness (t) to obtain a value smaller or larger than the layer thickness (t) determined through the unaltered relation.

Description

technical field [0001] The invention relates to an additive manufacturing system with an additive manufacturing device. The invention relates more particularly to a method of determining layer thicknesses for a three-dimensional model produced by an additive manufacturing device. Background technique [0002] In additive manufacturing, 3D models are printed layer-by-layer through light-based curing of a liquid printing medium (ie, liquid photocurable resin), which is selectively cured under the influence of ultraviolet radiation. In known variants of additive manufacturing such as SL (stereolithography) or DLP (digital light processing), the 3D object is pulled upside down from the liquid print medium, preferably by a platform. The duration of the printing process depends on factors such as the number of layers to be printed. Therefore, printing a 3D model in many thin layers takes longer than printing in a few thick layers. The layer thickness of the printed 3D model def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06F3/12
CPCG06T17/00G06F3/1208G06F3/1211G06F3/1253B29C64/393B33Y50/02A61C1/082B33Y40/20B33Y80/00B29L2031/7546G06T17/20G06T2210/36
Inventor C·斯塔尔D·魏斯
Owner DENTSPLY SIRONA INC