WO2019112466A1 - Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent - Google Patents

Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent Download PDF

Info

Publication number
WO2019112466A1
WO2019112466A1 PCT/RU2017/000924 RU2017000924W WO2019112466A1 WO 2019112466 A1 WO2019112466 A1 WO 2019112466A1 RU 2017000924 W RU2017000924 W RU 2017000924W WO 2019112466 A1 WO2019112466 A1 WO 2019112466A1
Authority
WO
WIPO (PCT)
Prior art keywords
photopolymer
printing
printed
layer
supports
Prior art date
Application number
PCT/RU2017/000924
Other languages
English (en)
Russian (ru)
Inventor
Юрий Евгеньевич ВИНОГРАДОВ
Олег Валентинович ВИГДОРЧИКОВ
Рубен Даниэльевич МЕДЖУЛУМЯН
Original Assignee
Юрий Евгеньевич ВИНОГРАДОВ
Олег Валентинович ВИГДОРЧИКОВ
Рубен Даниэльевич МЕДЖУЛУМЯН
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Юрий Евгеньевич ВИНОГРАДОВ, Олег Валентинович ВИГДОРЧИКОВ, Рубен Даниэльевич МЕДЖУЛУМЯН filed Critical Юрий Евгеньевич ВИНОГРАДОВ
Priority to PCT/RU2017/000924 priority Critical patent/WO2019112466A1/fr
Publication of WO2019112466A1 publication Critical patent/WO2019112466A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing

Definitions

  • the invention relates to the technology of three-dimensional printing of digital models, in particular, to the field of printing technologies by curing photopolymers.
  • the proposed method is intended for the implementation on its basis of 3D printers with improved performance, dimensional accuracy with multi-color three-dimensional printing.
  • Three-dimensional printing technologies are known in which photopolymer is flashed, for example, between the transparent bottom of a process bath with a photopolymer and a worktable (or the printed part of the part), and the printed part of the part being manufactured remains below the level of the photopolymer in the technological surface. And then, when printing the next layer of the part through the already hardened part of the part, the photopolymer is illuminated on the other side of the part, thereby increasing the thickness of the part beyond what is described by the specified digital model. With a laser spot size of less than 30 microns, even with professional printers the minimum wall thickness is guaranteed only within 0.4 to 10.6 mm. This circumstance is determined by fundamental contradictions due to the fact that the photopolymer must be transparent to the laser beam.
  • the printed part of the part also turns out to be transparent for the laser beam, which contradicts the accuracy of its dimensions, because the photopolymer behind the printed part of the part also lights up and stops illuminating only after creating the printed part with a thickness of about 0.3 to 10 mm.
  • the energy distribution in the laser beam corresponds to the Gaussian curve, and when printing subsequent layers of energy at the edges
  • the Gaussian curve of the energy distribution in the beam in the plane of the cross section also illuminates the areas of the photopolymer adjacent to the printed part.
  • Such disadvantages include the exposure and curing of the photopolymer, which already in liquid form flows around the already printed part of the part in the technological bath, which leads to a change (increase) in the size of the printed part in excess of the standard dimensions of the specified digital model. This leads to the "swimming" of small holes, which were displayed in a given digital model of the part.
  • This method contains the following operations:
  • a disadvantage of the known solution is the low print speed due to the long time the beam travels along all points of the layer or the long exposure time by the projector or the matrix of the entire area of the exposed layer, the low resolution of the print.
  • the task of this technical solution is to develop a new method of prototyping on a 3 D-printer.
  • the technical result of the claimed technical solution consists in increasing the resolution of 3D printers, speeding up their work in 3D prototyping, ensuring the possibility of full-color color reproduction both on the surface and the entire thickness (volume) of the printed part.
  • the method of stereolithography droplets of photopolymer and their subsequent curing is based on controlled movement of the print head of the printer over the printer's desktop in two directions with increasing distance between the desktop and the head before applying the subsequent layer of photopolymer, to heat the photopolymer by heaters with controlled temperature, and in addition, according to the invention, printing layer is used for applying a layer a transparent photopolymer and at least one colored photopolymer are distributed through the nozzles of the print head, then the photopolymer drops are applied and mixed in the place of their application so that the total volume of the colored photopolymer drops and the transparent photopolymer are the same for each print element of the printed part, the material is supported in the volume corresponding to the total volume of the photopolymer at each of the print points of the supports, the material applied is cured before printing on next layer.
  • the claimed method allows as a support in the right place to apply a photopolymer or water-soluble material, cured by cooling or drying, and apply it so that after curing the volume of solids corresponds to the total volume of the polymerized photopolymer for each print point of the part and support. Also, the issue of providing support in the claimed method can be solved by applying detail elements in a technological bath with an inert technical fluid whose density is greater than the density of the photopolymer and in which the liquid photopolymer does not dissolve quickly and the level of technical fluid is at the level of the previous layer already printed.
  • the preliminary distribution of a transparent photopolymer and at least one colored photopolymer through the nozzles of the print head allows three-dimensional printing of the product (part) in full-color version - both the entire outer surface of the part, and throughout the entire volume (thickness) of the part.
  • applying and mixing a drop of photopolymer at the places of their application provided that the total volume of drops of colored photopolymers and transparent photopolymer was the same for printing each element of the printed part, avoids distortion of parts and ensure their solidity and integrity, which, as a result, significantly improves the quality of the printed product.
  • Applying the support material in the volume corresponding to the total volume of the photopolymer at each of the support print points curing the material applied by the print head before printing another layer is necessary so that the supports correspond to the height of the new part above the base from which the supports are printed.
  • the claimed method of 3D prototyping involves applying the material of the printed part and supports, and only then the subsequent curing of the applied material.
  • the advantage of the claimed method is that after printing, the part does not need to be washed and cleaned from the remnants of the photopolymer on it.
  • a special program creates a file with images of layer-slices of the part, including supports.
  • This file displays the layers of the 3 D-models and is the basis for controlling the elements of the printer during three-dimensional printing.
  • Hot photopolymer at a temperature of 50 ° C to 60 ° C, becomes much more fluid and can be applied to the right places with a 3 D printer head.
  • Modern heads have more than 180 active multi-color nozzles, and the resolution of modern heads (1440 dpi) allows for printing accuracy of at least 16 microns.
  • the speed of printing a 3D printer in the claimed method increases many times in proportion to the number of nozzles in the head. Accordingly, 180 or more fragments are printed in a single pass of the head, and not one, as with laser scanning.
  • the exposure time of the projector has to be increased in proportion to the increase in the illumination area of the projector relative to the spot area of the laser beam, or to increase the brightness of the light source.
  • the existing 3D printing technologies it is not possible to raise the brightness of the light source so that the light does not destroy the light modulator, and so that the printing speed when the projector or the matrix is illuminated becomes more than the speed of the laser beam.
  • the claimed method allows to increase the printing speed relative to the known printing methods (LCD technology, DLP technology, SLA technology), which have already reached the maximum printing speed.
  • the gain in speed of three-dimensional printing using the inventive method is up to 180 times faster than printing speed in comparison with existing printing technologies on a 3D printer.
  • supports from a water-soluble material allows you to form supports in difficult-to-access part cavities with easy subsequent removal of the supports.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne la technologie de l'impression 3D de modèles numériques, notamment le domaine des technologies d'impression 3D par durcissement de photopolymères et vise à mettre en oeuvre de nouvelles imprimantes tout en réduisant le temps nécessaire à la fabrication d'un seul modèle en 3D. Le procédé consiste d'abord en une impression de couche modèle puis le durcissement du matériau dans la couche avant l'impression de la couche suivante. Le procédé permet de sélectionner la technologie de fabrication de supports et notamment d'impression de supports en photopolymère et d'impression en matériaux solubles dans l'eau durcis par le refroidissement ou le séchage jusqu'à la possible de se passer complètement de supports lors de l'impression 3D de n'importe quel degré de complexité et de configuration.
PCT/RU2017/000924 2017-12-08 2017-12-08 Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent WO2019112466A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/RU2017/000924 WO2019112466A1 (fr) 2017-12-08 2017-12-08 Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2017/000924 WO2019112466A1 (fr) 2017-12-08 2017-12-08 Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent

Publications (1)

Publication Number Publication Date
WO2019112466A1 true WO2019112466A1 (fr) 2019-06-13

Family

ID=66751734

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2017/000924 WO2019112466A1 (fr) 2017-12-08 2017-12-08 Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent

Country Status (1)

Country Link
WO (1) WO2019112466A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112848284A (zh) * 2020-12-09 2021-05-28 安徽工程大学 一种二次光固化干燥装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876012A1 (fr) * 2006-07-07 2008-01-09 Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO Procédé et système pour la fabrication par couches d'un objet tangible
WO2012143786A1 (fr) * 2011-04-20 2012-10-26 Dws S.R.L. Procédé de production d'un objet tridimensionnel et machine de stéréolithographie employant ledit procédé
WO2014013312A1 (fr) * 2012-07-16 2014-01-23 Dws Srl Procédé de stéréolithographie servant à la production d'un objet tridimensionnel, comprenant un mouvement en fonction duquel une surface de support pour ledit objet s'approche de manière intermittente du fond d'un récipient, et machine de stéréolithographie utilisant ledit procédé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876012A1 (fr) * 2006-07-07 2008-01-09 Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO Procédé et système pour la fabrication par couches d'un objet tangible
WO2012143786A1 (fr) * 2011-04-20 2012-10-26 Dws S.R.L. Procédé de production d'un objet tridimensionnel et machine de stéréolithographie employant ledit procédé
WO2014013312A1 (fr) * 2012-07-16 2014-01-23 Dws Srl Procédé de stéréolithographie servant à la production d'un objet tridimensionnel, comprenant un mouvement en fonction duquel une surface de support pour ledit objet s'approche de manière intermittente du fond d'un récipient, et machine de stéréolithographie utilisant ledit procédé

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112848284A (zh) * 2020-12-09 2021-05-28 安徽工程大学 一种二次光固化干燥装置

Similar Documents

Publication Publication Date Title
KR102162854B1 (ko) 3d 인쇄 디바이스를 사용하여 대상물을 생산하는 방법 및 디바이스
US7892474B2 (en) Continuous generative process for producing a three-dimensional object
CN105500700B (zh) 一种彩色三维打印装置及方法
EP3204217B1 (fr) Changement d'emplacement de durcissement pendant une impression 3d
EP3147105B1 (fr) Dispositif de formation pour former des structures tridimensionnelles
US7329379B2 (en) Method for solid freeform fabrication of a three-dimensional object
US8609204B2 (en) Apparatus and method for solid freeform fabrication
DK2083992T3 (en) Continuous, generative method and apparatus for the manufacture of a three-dimensional object
EP3271151B1 (fr) Chauffage contrôlé pour impression en 3d
GB2233928A (en) Forming an article from computer controlled jet of photosetting resin droplets.
JPH02130132A (ja) 光学的造形物の製造方法
JP2002307562A (ja) 三次元造形装置、および三次元造形方法
JP7353352B2 (ja) オブジェクトを層ごとにビルドアップする方法及びこのような方法を実行するための３ｄ印刷装置
CN104890246B (zh) 一种利用光固化3d打印机的打印方法以及3d打印系统
WO2019112466A1 (fr) Procédé de stéréolitographie par gouttes de photopolymère avec durcissement subséquent
JP6685200B2 (ja) 三次元造形装置
JP3712202B2 (ja) 光固化着色造形方法及び装置
US11433602B2 (en) Stereolithography machine with improved optical group
JP2738016B2 (ja) 三次元成形装置
JP2004042546A (ja) 機能性材料の積層造形方法
JP2019500505A (ja) ３次元の金属成形体を製造する装置および方法
EP3906149A1 (fr) Procédé et système de commande d'un système de refroidissement dans une impression tridimensionnelle
US20220001596A1 (en) Opacifying agent application in three-dimensional printing
DE10143218A1 (de) Verfahren und Vorrichtung zum Drucken 3D-modellierter Objekte
CN206085667U (zh) 3d综合循环打印装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17934275

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17934275

Country of ref document: EP

Kind code of ref document: A1