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1. WO2022000748 - DLP PRINTING CONTROL METHOD BASED ON ABSORBANCE PROPERTIES OF PHOTOCURED MATERIAL

Publication Number WO/2022/000748
Publication Date 06.01.2022
International Application No. PCT/CN2020/112094
International Filing Date 28.08.2020
IPC
B29C 64/393 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
64Additive manufacturing, i.e. manufacturing of three-dimensional objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
30Auxiliary operations or equipment
386Data acquisition or data processing for additive manufacturing
393for controlling or regulating additive manufacturing processes
B29C 64/386 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
64Additive manufacturing, i.e. manufacturing of three-dimensional objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
30Auxiliary operations or equipment
386Data acquisition or data processing for additive manufacturing
B29C 64/106 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
64Additive manufacturing, i.e. manufacturing of three-dimensional objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
10Processes of additive manufacturing
106using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
B33Y 50/00 2015.1
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
50Data acquisition or data processing for additive manufacturing
B33Y 50/02 2015.1
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
50Data acquisition or data processing for additive manufacturing
02for controlling or regulating additive manufacturing processes
Applicants
  • 浙江大学 ZHEJIANG UNIVERSITY [CN]/[CN]
Inventors
  • 尹俊 YIN, Jun
  • 李洋 LI, Yang
  • 王一帆 WANG, Yifan
  • 茅棋江 MAO, Qijiang
  • 傅建中 FU, Jianzhong
Agents
  • 杭州求是专利事务所有限公司 HANGZHOU QIUSHI PATENT OFFICE CO., LTD.
Priority Data
202010625870.301.07.2020CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) DLP PRINTING CONTROL METHOD BASED ON ABSORBANCE PROPERTIES OF PHOTOCURED MATERIAL
(FR) PROCÉDÉ DE COMMANDE D'IMPRESSION DLP BASÉ SUR LES PROPRIÉTÉS D'ABSORBANCE D'UN MATÉRIAU PHOTODURCI
(ZH) 一种基于光固化材料吸光度性质的DLP打印控制方法
Abstract
(EN) Disclosed in the present invention is a DLP printing control method based on absorbance properties of a photocured material. A light absorber is added to the photocured material for DLP printing, liquid and solid absorbances of the photocured material in unit thickness under the condition of different light absorber concentrations are tested, a ratio is obtained as an actual solid-liquid absorbance ratio, and the actual solid-liquid absorbance ratio is compared with a theoretical predicted value of the solid-liquid absorbance ratio to obtain an actually selected concentration of the light absorber in the photocured material; a curing threshold time of the photocured material is measured, and the solid absorbance in unit thickness, the liquid absorbance in unit thickness, and the curing threshold time of the photocured material are brought into a single-layer curing model for processing to obtain the relationship between an exposure time tT and a curing thickness H; and for a case to be tested, the curing thickness is inputted to obtain the exposure time to perform DLP printing control. According to the present invention, DLP photocurable printing parameters of materials can be accurately obtained, complex and repeated forming experiment tests are avoided, and the materials are saved more precisely.
(FR) La présente invention divulgue un procédé de commande d'impression DLP basé sur les propriétés d'absorbance d'un matériau photodurci. Un agent absorbant la lumière est ajouté au matériau photodurci destiné à l'impression DLP ; des absorbances à l'état liquide et solide du matériau photodurci, par épaisseur unitaire et pour différentes concentrations d'agent absorbant la lumière, sont testées ; un rapport est obtenu qui est un rapport d'absorbance solide-liquide réel, et le rapport d'absorbance solide-liquide réel est comparé à une valeur théorique prédite du rapport d'absorbance solide-liquide afin d'obtenir une concentration réellement sélectionnée de l'agent absorbant la lumière dans le matériau photodurci ; un temps de seuil de durcissement du matériau photodurci est mesuré ; et l'absorbance à l'état solide par épaisseur unitaire, l'absorbance à l'état liquide par épaisseur unitaire et le temps de seuil de durcissement du matériau photodurci sont rentrés dans un modèle de durcissement monocouche et traités pour obtenir la relation entre un temps d'exposition tT et une épaisseur de durcissement H ; et pour tester un cas, l'épaisseur de durcissement est entrée afin d'obtenir le temps d'exposition afin de commander l'impression DLP. La présente invention permet d'obtenir avec exactitude des paramètres d'impression photodurcissable DLP de matériaux, d'éviter des tests d'expérience de formation complexes et répétés et d'économiser plus précisément les matériaux.
(ZH) 本发明公开了一种基于光固化材料吸光度性质的DLP打印控制方法。将光吸收剂加入到光固化材料中进行DLP打印,测试光固化材料在不同光吸收剂浓度情况下的单位厚度的液体和固体吸光度,求比值作为实际的固液吸光度比,并和固液吸光度比的理论预测值进行比较,获得实际的光固化材料中光吸收剂所选浓度;测定光固化材料的固化阈值时间,将光固化材料的单位厚度的固体吸光度、单位厚度的液体吸光度和固化阈值时间带入单层固化模型中,处理获得曝光时间tT和固化厚度H的关系;对于待测情况,输入固化厚度获得曝光时间进行DLP打印控制。本发明能准确获得材料的DLP光固化打印参数,避免了复杂且重复多次的成形实验测试,节省材料更精确。
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