WO2015124819A1 - Three-dimensional printer - Google Patents

Three-dimensional printer Download PDF

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Publication number
WO2015124819A1
WO2015124819A1 PCT/ES2015/070111 ES2015070111W WO2015124819A1 WO 2015124819 A1 WO2015124819 A1 WO 2015124819A1 ES 2015070111 W ES2015070111 W ES 2015070111W WO 2015124819 A1 WO2015124819 A1 WO 2015124819A1
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WO
WIPO (PCT)
Prior art keywords
resin
platform
tray
dimensional printer
horizontal
Prior art date
Application number
PCT/ES2015/070111
Other languages
Spanish (es)
French (fr)
Inventor
Joan RAVENTÓS CORRAL
Original Assignee
Stalactite 3D, S.L.
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 Stalactite 3D, S.L. filed Critical Stalactite 3D, S.L.
Publication of WO2015124819A1 publication Critical patent/WO2015124819A1/en

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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
    • 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
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
    • B29C64/135—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
    • 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
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/227—Driving means
    • B29C64/232—Driving means for motion along the axis orthogonal to the plane of a layer
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete

Definitions

  • the present invention relates to a three-dimensional printer, suitable for printing three-dimensional parts or prototypes in resin and comprising: a tray containing a photopolymerizable resin; a light source controlled by a control system; a modeling platform suitable for prototype support during the formation therein of successive layers of light-curing resin, solidified by light projection; and a drive device suitable for separating the bottom of the tray from the successive layers of solidified resin.
  • the printer of the invention has characteristics oriented to improve the separation of the solidified resin layers from the bottom of the tray containing the light-curing resin, and to improve the positioning of the modeling platform at a certain point prior to the solidification of the successive ones. layers of resin in the part or three-dimensional model.
  • This invention is applicable in the manufacture of three-dimensional printers.
  • three-dimensional or 3D printers which have a molding platform on which the three-dimensional part or prototype is formed, from the solidification of successive layers of light-curing resin.
  • This resin is initially in a fluid state, inside a container tray, being arranged above or below said tray a light source that is controlled in a known manner by a control system, into which the user enters the characteristics of the piece or prototype Three-dimensional to print.
  • the modeling platform is associated with vertical displacement means that allow small displacements of the platform in an upward direction as new layers of photopolymerizable resin are solidified on the lower end of the piece or prototype by the action of the source of light.
  • This tilting movement is produced by an eccentric piece that presses one side of the tray towards the lower area, and springs that return the tray to its zero, or reference, level on the vertical axis.
  • the molding platform is moved with a purely vertical movement and of an adequate amplitude to constitute a new layer of solidified resin on the lower end of the piece or prototype
  • This peeling or molding technique has several drawbacks, among which are the following: the incorporation into the printer of two different drive systems (one to cause the tilting of the tray and the other to move the molding platform vertically); possible errors of repositioning the tray at a zero level due to the action of the springs, said tray being kept in a floating position on the springs; and the ability to peel or release printing surfaces of a reduced amplitude when the tilting of the tray is applied only on one of the sides thereof. Therefore, the technical problem that arises is the development of a three-dimensional printer that allows solving the problem described above.
  • the three-dimensional printer object of the invention comprises a series of elements common in this type of printers, such as: a tray containing a photopolymerizable resin; a light source controlled by a control system; a modeling platform suitable for prototype support during the formation therein of successive layers of solidified photopolymerizable resin by light projection; and a drive device suitable for separating or peeling, from the bottom of the tray, the successive layers of resin solidified in the prototype.
  • This printer has some constructive features aimed at solving the problems described above.
  • one of the objectives of the invention is to use a single device to move the platform vertically between the formation of successive layers of solidified resin and to peel or separate said layers from the bottom of the resin container tray, simplifying manufacturing and reducing the costs of the three-dimensional printer.
  • Another object of the invention is to eliminate the repositioning errors of the resin container tray at a zero level, or reference, prior to the solidification of each resin layer.
  • Another object of the invention is to improve the peeling or separation of the successive layers of solidified resin from the bottom of the tray, especially in the case of larger printing surfaces.
  • the tray containing the light-curing resin is fixed, that is, it is kept static in the position corresponding to the zero or reference level during the printing process; while the modeling platform is mounted on a drive device with the possibility of vertical displacement and lateral tilting between two extreme positions in which said platform it forms two acute angles of opposite directions with respect to the horizontal.
  • FIG. 1 shows a schematic elevation view of an exemplary embodiment of a three-dimensional printer according to the invention.
  • FIGS. 2a and 2b show schematic views of the printer of the previous figure during the printing of a piece or prototype and more specifically during peeling or separating the tray from the last layer of resin solidified, being able to observe the inclined platform respectively in two opposite directions with respect to the horizontal.
  • the three-dimensional printer comprises a tray (1) arranged in a fixed position and containing a photopolymerizable resin (2), in a fluid state.
  • a light source (3) connected to a control system (not shown) that is responsible for carrying out the photopolymerization and solidification of successive layers of the resin (2) to form a piece or prototype (4) arranged on a modeling platform (5) located above the tray (1).
  • Said platform (5) is mounted on a drive device comprising at least two movable supports (6) that can be moved vertically independently and to which they are fixed, with the possibility of turning with respect to two horizontal axes (7), two opposite ends of a bridge (8) carrying the modeling platform (5), and linear actuators (1 1 -13) independently operable for the vertical displacement of the respective movable supports (6) and the tilting of the platform (5) in opposite directions with respect to the horizontal.
  • the supports (6) are provided with linear bearings (9) mounted with the possibility of longitudinal displacement in vertical guides (10).
  • Said supports (6) move vertically by the action of respective linear actuators (1 1 -13), which in this embodiment comprise threaded bushings (13) fixed to the aforementioned movable supports (6) and mounted on two spindles ( 1 1) verticals connected to two motors (12) step by step, independently driven.
  • respective linear actuators (1 1 -13) which in this embodiment comprise threaded bushings (13) fixed to the aforementioned movable supports (6) and mounted on two spindles ( 1 1) verticals connected to two motors (12) step by step, independently driven.
  • the drive device In order to peel or release the bottom of the tray (1) of each layer of photopolymerized and solidified resin (2), the drive device initially performs the lifting of one of the supports (6), specifically, in the example, the corresponding to the right side in figure 2a, and then the elevation of the support (6) corresponding to the left side of the platform, as shown in figure 2b.
  • the platform (5) tilts laterally between two extreme positions in which it forms two acute angles of opposite directions with respect to the horizontal, guaranteeing the peeling or separation of the entire surface of the solidified resin layer, regardless of Its size or extension.

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

Abstract

The invention relates to a three-dimensional printer suitable for printing three-dimensional parts and prototypes (4) in light-curable resin (2), said three-dimensional printer comprising: a secure horizontal tray (1) containing the resin (2) and disposed above the light source (3); a vertical modelling platform (5) which is mounted on an actuating device and can tilt laterally between two end positions, forming two acute angles in opposing directions in relation to the horizontal. The actuating device is provided with: two vertically moveable supports (6) on which are mounted two opposing ends of a bridge (8) carrying the platform (5), such that they can rotate relative to respective horizontal axes (7); and linear actuators (11-13) that can be actuated independently. The linear actuators comprise threaded sleeves (13) secured to the respective supports (6) that are moveable and mounted on respective vertical spindles (11) connected to respective independently actuated stepper motors (12). The moveable supports (6) comprise respective linear bearings (9) mounted such that they can move longitudinally on the vertical guides (10).

Description

M E M O R I A D E S C R I P T I V A  DESCRIPTIVE MEMORY
IMPRESORA TRIDIMENSIONAL Objeto de la invención. THREE-DIMENSIONAL PRINTER Object of the invention.
La presente invención se refiere a una impresora tridimensional, adecuada para la impresión de piezas o prototipos tridimensionales en resina y que comprende: una bandeja contenedora de una resina fotopolimerizable; una fuente de luz controlada por un sistema de control; una plataforma de modelado adecuada para el soporte del prototipo durante la formación en el mismo de sucesivas capas de resina fotopolimerizable, solidificada mediante la proyección de luz; y un dispositivo de accionamiento adecuado para la separación del fondo de la bandeja de las sucesivas capas de resina solidificadas. The present invention relates to a three-dimensional printer, suitable for printing three-dimensional parts or prototypes in resin and comprising: a tray containing a photopolymerizable resin; a light source controlled by a control system; a modeling platform suitable for prototype support during the formation therein of successive layers of light-curing resin, solidified by light projection; and a drive device suitable for separating the bottom of the tray from the successive layers of solidified resin.
La impresora de la invención presenta unas características orientadas a mejorar la separación de las capas de resina solidificadas del fondo de la bandeja contenedora de la resina fotopolimerizable, y a mejorar el posicionamiento de la plataforma de modelado en un punto determinado previamente a la solidificación de las sucesivas capas de resina en la pieza o modelo tridimensional. The printer of the invention has characteristics oriented to improve the separation of the solidified resin layers from the bottom of the tray containing the light-curing resin, and to improve the positioning of the modeling platform at a certain point prior to the solidification of the successive ones. layers of resin in the part or three-dimensional model.
Campo de aplicación. Scope.
Esta invención es aplicable en la fabricación de impresoras tridimensionales. This invention is applicable in the manufacture of three-dimensional printers.
Estado de la técnica. State of the art
Actualmente son conocidas las impresoras tridimensionales, ó 3D, que disponen de una plataforma de moldeo sobre la qué se va formando la pieza o prototipo tridimensional, a partir de la solidificación de sucesivas capas de resina fotopolimerizable. Currently, three-dimensional or 3D printers are known, which have a molding platform on which the three-dimensional part or prototype is formed, from the solidification of successive layers of light-curing resin.
Esta resina se encuentra inicialmente en estado fluido, en el interior de una bandeja contenedora, encontrándose dispuesta por encima o por debajo de la mencionada bandeja una fuente de luz que es controlada de manera conocida por un sistema de control, en el cual el usuario introduce las características de la pieza o prototipo tridimensional a imprimir. This resin is initially in a fluid state, inside a container tray, being arranged above or below said tray a light source that is controlled in a known manner by a control system, into which the user enters the characteristics of the piece or prototype Three-dimensional to print.
La plataforma de modelado se encuentra asociada a unos medios de desplazamiento vertical que permiten pequeños desplazamientos de la plataforma en sentido ascendente a medida que se van solidificando sobre el extremo inferior de la pieza o prototipo nuevas capas de resina fotopolimerizable por la acción de la fuente de luz. The modeling platform is associated with vertical displacement means that allow small displacements of the platform in an upward direction as new layers of photopolymerizable resin are solidified on the lower end of the piece or prototype by the action of the source of light.
Cada vez que se solidifica una capa de resina se crea un vacío y una adherencia entre dicha capa de resina solidificada y el fondo transparente de la bandeja contenedora, siendo preciso realizar el pelado o separación de dicha capa de resina solidificada del fondo de la bandeja. Each time a resin layer solidifies, a vacuum and adhesion is created between said solidified resin layer and the transparent bottom of the container tray, it being necessary to peel or separate said solidified resin layer from the bottom of the tray.
Para realizar esta operación de separación o pelado se utiliza una técnica conocida que consiste en mover la bandeja contenedora de la resina mientras que la plataforma de modelado y el prototipo o pieza en impresión permanecen estáticos. To perform this separation or peeling operation, a known technique is used that consists in moving the resin tray while the modeling platform and the prototype or piece in print remain static.
Este movimiento de basculación es producido mediante una pieza excéntrica que presiona un lateral de la bandeja hacia la zona inferior, y unos muelles que devuelven la bandeja a su cota cero, o de referencia, en el eje vertical. This tilting movement is produced by an eccentric piece that presses one side of the tray towards the lower area, and springs that return the tray to its zero, or reference, level on the vertical axis.
En estas impresoras 3D, una vez realizado el pelado o separación de la capa de resina solidificada, se desplaza la plataforma de moldeado con un movimiento puramente vertical y de una amplitud adecuada para constituir una nueva capa de resina solidificada sobre el extremo inferior de la pieza o prototipo. In these 3D printers, once the peeling or separation of the solidified resin layer has been carried out, the molding platform is moved with a purely vertical movement and of an adequate amplitude to constitute a new layer of solidified resin on the lower end of the piece or prototype
Esta técnica de pelado o moldeo presenta diversos inconvenientes entre los cuales cabe mencionar: la incorporación en la impresora de dos sistemas de accionamiento diferentes (uno para provocar la basculación de la bandeja y otro para desplazar verticalmente la plataforma de moldeado); posibles errores de reposicionamiento de la bandeja en una cota cero por la acción de los muelles, manteniéndose dicha bandeja en una posición flotante sobre los muelles; y la capacidad de pelar o liberar superficies de impresión de una amplitud reducida al aplicarse la basculación de la bandeja solamente en uno de los laterales de la misma. Por tanto, el problema técnico que se plantea es el desarrollo de una impresora tridimensional que permita resolver la problemática expuesta anteriormente. This peeling or molding technique has several drawbacks, among which are the following: the incorporation into the printer of two different drive systems (one to cause the tilting of the tray and the other to move the molding platform vertically); possible errors of repositioning the tray at a zero level due to the action of the springs, said tray being kept in a floating position on the springs; and the ability to peel or release printing surfaces of a reduced amplitude when the tilting of the tray is applied only on one of the sides thereof. Therefore, the technical problem that arises is the development of a three-dimensional printer that allows solving the problem described above.
Descripción de la invención. Description of the invention
La impresora tridimensional objeto de la invención, comprende una serie de elementos habituales en este tipo de impresoras, tales como: una bandeja contenedora de una resina fotopolimerizable; una fuente de luz controlada por un sistema de control; una plataforma de modelado adecuada para el soporte del prototipo durante la formación en el mismo de sucesivas capas de resina fotopolimerizable solidificada mediante la proyección de luz; y un dispositivo de accionamiento adecuado para la separación o pelado, del fondo de la bandeja, de las sucesivas capas de resina solidificadas en el prototipo. Esta impresora presenta unas particularidades constructivas orientadas a solventar la problemática expuesta anteriormente. Concretamente uno de los objetivos de la invención es utilizar un único dispositivo para desplazar verticalmente la plataforma entre la formación de sucesivas capas de resina solidificada y realizar el pelado o separación de dichas capas respecto al fondo de la bandeja contenedora de la resina, simplificando la fabricación y reduciendo los costes de la impresora tridimensional. The three-dimensional printer object of the invention comprises a series of elements common in this type of printers, such as: a tray containing a photopolymerizable resin; a light source controlled by a control system; a modeling platform suitable for prototype support during the formation therein of successive layers of solidified photopolymerizable resin by light projection; and a drive device suitable for separating or peeling, from the bottom of the tray, the successive layers of resin solidified in the prototype. This printer has some constructive features aimed at solving the problems described above. Specifically, one of the objectives of the invention is to use a single device to move the platform vertically between the formation of successive layers of solidified resin and to peel or separate said layers from the bottom of the resin container tray, simplifying manufacturing and reducing the costs of the three-dimensional printer.
Otro de los objetivos de la invención es eliminar los errores de reposicionamiento de la bandeja contenedora de la resina en una cota cero, o de referencia, previamente a la solidificación de cada capa de resina. Another object of the invention is to eliminate the repositioning errors of the resin container tray at a zero level, or reference, prior to the solidification of each resin layer.
Otro objetivo de la invención es mejorar el pelado o separación de las sucesivas capas de resina solidificadas del fondo de la bandeja, especialmente en el caso de las superficies de impresión de mayor tamaño. Another object of the invention is to improve the peeling or separation of the successive layers of solidified resin from the bottom of the tray, especially in the case of larger printing surfaces.
Para ello y de acuerdo con invención, en esta impresora tridimensional la bandeja contenedora de la resina fotopolimerizable es fija, es decir, se mantiene estática en la posición correspondiente a la cota cero o de referencia durante el proceso de impresión; mientras que la plataforma de modelado se encuentra montada sobre un dispositivo de accionamiento con posibilidad de desplazamiento vertical y de basculacion lateral entre dos posiciones extremas en las qué dicha plataforma forma dos ángulos agudos de sentidos opuestos respecto a la horizontal. For this and according to the invention, in this three-dimensional printer the tray containing the light-curing resin is fixed, that is, it is kept static in the position corresponding to the zero or reference level during the printing process; while the modeling platform is mounted on a drive device with the possibility of vertical displacement and lateral tilting between two extreme positions in which said platform it forms two acute angles of opposite directions with respect to the horizontal.
Con estas características se consiguen los objetivos propuestos, ya que al mantenerse la bandeja en una posición fija se eliminan los errores de reposicionamiento de la misma. With these characteristics, the proposed objectives are achieved, since keeping the tray in a fixed position eliminates its repositioning errors.
El montaje de la plataforma de modelado sobre un dispositivo de soporte que permite tanto el desplazamiento vertical de la plataforma para posicionarla a una altura predeterminada previamente a la solidificación de una nueva capa de resina, como la basculación lateral de dicha plataforma para realizar la separación o pelado de las sucesivas capas de resinas solidificada, hace innecesario la utilización de un dispositivo adicional para la basculación de la bandeja, tal como ocurre en las impresoras existentes. También cabe mencionar que la posibilidad de basculación lateral de la bandeja, primero hacia un lateral y después hacia el otro respecto a la horizontal, permite realizar un correcto pelado o separación de capas de resina respecto al fondo de la bandeja, incluso en superficies de impresión de gran tamaño. Estas y otras características adicionales de la invención, recogidas en las reivindicaciones, se comprenderán con mayor facilidad a la vista del ejemplo de realización mostrado en las figuras adjuntas. The assembly of the modeling platform on a support device that allows both the vertical displacement of the platform to position it at a predetermined height prior to the solidification of a new resin layer, as the lateral tilting of said platform to perform the separation or Peeling the successive layers of solidified resins makes unnecessary the use of an additional device for tilting the tray, as is the case with existing printers. It is also worth mentioning that the possibility of lateral tilting of the tray, first towards one side and then towards the other with respect to the horizontal one, allows a correct peeling or separation of resin layers from the bottom of the tray, even on printing surfaces Large size. These and other additional features of the invention, set out in the claims, will be more readily understood in view of the exemplary embodiment shown in the attached figures.
Descripción de las figuras. Description of the figures.
Para complementar la descripción que se está realizando y con objeto de facilitar la comprensión de las características de la invención, se acompaña a la presente memoria descriptiva un juego de dibujos en los que, con carácter ilustrativo y no limitativo, se ha representado lo siguiente: To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings is attached to the present specification in which, for illustrative and non-limiting purposes, the following has been represented:
- La figura 1 muestra una vista esquemática en alzado de un ejemplo de realización de una impresora tridimensional según la invención. - Figure 1 shows a schematic elevation view of an exemplary embodiment of a three-dimensional printer according to the invention.
- Las figuras 2a y 2b muestran sendas vistas esquemáticas de la impresora de la figura anterior durante la impresión de una pieza o prototipo y más concretamente durante el pelado o separación de la bandeja de la última capa de resina solidificada, pudiendo observarse la plataforma inclinada respectivamente en dos sentidos opuestos respecto a la horizontal. - Figures 2a and 2b show schematic views of the printer of the previous figure during the printing of a piece or prototype and more specifically during peeling or separating the tray from the last layer of resin solidified, being able to observe the inclined platform respectively in two opposite directions with respect to the horizontal.
Realización preferida de la invención. Preferred embodiment of the invention.
En la figura 1 la impresora tridimensional comprende una bandeja (1 ) dispuesta en una posición fija y que contiene una resina (2) fotopolimerizable, en estado fluido. In Figure 1 the three-dimensional printer comprises a tray (1) arranged in a fixed position and containing a photopolymerizable resin (2), in a fluid state.
Por debajo de la bandeja se encuentra dispuesta una fuente de luz (3), conectada a un sistema de control (no representado) que es el encargado de realizar la fotopolimerización y solidificación de sucesivas capas de la resina (2) para formar una pieza o prototipo (4) dispuesto en una plataforma (5) de modelado situada por encima de la bandeja (1 ). La mencionada plataforma (5) se encuentra montada en un dispositivo de accionamiento que comprende, al menos, dos soportes (6) desplazables verticalmente de modo independiente y a los qué se encuentran fijados, con posibilidad de giro respecto a sendos ejes horizontales (7), dos extremos opuestos de un puente (8) portador de la plataforma (5) de modelado, y unos actuadores lineales (1 1 -13) accionables de manera independiente para el desplazamiento vertical de los respectivos soportes (6) desplazables y la basculacion de la plataforma (5) en sentidos opuestos respecto a la horizontal. Below the tray is a light source (3), connected to a control system (not shown) that is responsible for carrying out the photopolymerization and solidification of successive layers of the resin (2) to form a piece or prototype (4) arranged on a modeling platform (5) located above the tray (1). Said platform (5) is mounted on a drive device comprising at least two movable supports (6) that can be moved vertically independently and to which they are fixed, with the possibility of turning with respect to two horizontal axes (7), two opposite ends of a bridge (8) carrying the modeling platform (5), and linear actuators (1 1 -13) independently operable for the vertical displacement of the respective movable supports (6) and the tilting of the platform (5) in opposite directions with respect to the horizontal.
Los soportes (6) están provistos de unos cojinetes lineales (9) montados con posibilidad de desplazamiento longitudinal en sendas guías verticales (10). The supports (6) are provided with linear bearings (9) mounted with the possibility of longitudinal displacement in vertical guides (10).
Dichos soportes (6) se desplazan verticalmente por la acción de respectivos actuadores lineales (1 1 -13), que en este ejemplo de realización comprenden unos caequillos roscados (13) fijados a los aludidos soportes (6) desplazables y montados sobre sendos husillos (1 1 ) verticales conectados a sendos motores (12) paso a paso, de accionamiento independiente. Said supports (6) move vertically by the action of respective linear actuators (1 1 -13), which in this embodiment comprise threaded bushings (13) fixed to the aforementioned movable supports (6) and mounted on two spindles ( 1 1) verticals connected to two motors (12) step by step, independently driven.
Mediante el accionamiento simultáneo de los motores (12) se consigue el desplazamiento totalmente vertical de la plataforma (5) y su disposición de una manera precisa, a unas distancias predeterminadas del fondo de la bandeja (1 ) durante la fotopolimerización y solidificación de las sucesivas capas de resina (2). Para realizar el pelado o liberación del fondo de la bandeja (1 ) de cada capa de resina (2) fotopolimerizada y solidificada, el dispositivo de accionamiento realiza inicialmente la elevación de uno de los soportes (6), concretamente, en el ejemplo, el correspondiente al lateral derecho en la figura 2a, y a continuación la elevación del soporte (6) correspondiente al lateral izquierdo de la plataforma, tal como se muestra en la figura 2b. By means of the simultaneous actuation of the motors (12) the completely vertical displacement of the platform (5) is achieved and its arrangement in a precise way, at predetermined distances from the bottom of the tray (1) during the photopolymerization and solidification of the successive ones resin layers (2). In order to peel or release the bottom of the tray (1) of each layer of photopolymerized and solidified resin (2), the drive device initially performs the lifting of one of the supports (6), specifically, in the example, the corresponding to the right side in figure 2a, and then the elevation of the support (6) corresponding to the left side of the platform, as shown in figure 2b.
Durante estos movimientos, la plataforma (5) bascula lateralmente entre dos posiciones extremas en las qué forma dos ángulos agudos de sentidos opuestos respecto a la horizontal, garantizando el pelado o separación de la totalidad de la superficie la capa de resina solidificada, con independencia de su tamaño o extensión. During these movements, the platform (5) tilts laterally between two extreme positions in which it forms two acute angles of opposite directions with respect to the horizontal, guaranteeing the peeling or separation of the entire surface of the solidified resin layer, regardless of Its size or extension.
Una vez descrita suficientemente la naturaleza de la invención, así como un ejemplo de realización preferente, se hace constar a los efectos oportunos que los materiales, forma, tamaño y disposición de los elementos descritos podrán ser modificados, siempre y cuando ello no suponga una alteración de las características esenciales de la invención que se reivindican a continuación. Once the nature of the invention has been sufficiently described, as well as a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the described elements may be modified, provided that this does not imply an alteration. of the essential features of the invention that are claimed below.

Claims

R E I V I N D I C A C I O N E S R E I V I N D I C A C I O N E S
Impresora tridimensional; adecuada para la impresión de piezas y prototipos (4) tridimensionales en resina (2) fotopolimerizable y que comprende: una bandeja (1 ) contenedora de una resina (2) fotopolimerizable; una fuente de luz (3) controlada por un sistema de control; una plataforma (5) de modelado adecuada para el soporte de la pieza o prototipo (4) durante la formación en el mismo de sucesivas capas de resina (2) fotopolimerizable solidificada mediante la proyección de luz; y un dispositivo de accionamiento adecuado para la separación o pelado, del fondo de la bandeja (1 ), de las sucesivas capas de resina solidificadas en la pieza o prototipo (4); caracterizada porque: Three-dimensional printer; suitable for printing three-dimensional pieces and prototypes (4) in light-curing resin (2) and comprising: a tray (1) containing a light-curing resin (2); a light source (3) controlled by a control system; a modeling platform (5) suitable for the support of the piece or prototype (4) during the formation therein of successive layers of photopolymerizable resin (2) solidified by light projection; and a drive device suitable for separating or peeling, from the bottom of the tray (1), of the successive layers of resin solidified in the piece or prototype (4); characterized because:
- la bandeja (1 ) contenedora de la resina (2) es horizontal, fija y dispuesta sobre la fuente de luz (3); y, - the tray (1) containing the resin (2) is horizontal, fixed and arranged on the light source (3); Y,
- la plataforma (5) de modelado se encuentra montada sobre un dispositivo de accionamiento, con posibilidad de desplazamiento vertical y de basculación lateral entre dos posiciones extremas en las qué dicha la plataforma (5) forma dos ángulos agudos de sentidos opuestos respecto a la horizontal. - the modeling platform (5) is mounted on a drive device, with the possibility of vertical displacement and lateral tilting between two extreme positions in which said platform (5) forms two acute angles of opposite directions with respect to the horizontal .
Impresora tridimensional, según la reivindicación 1 , caracterizada porque el dispositivo de accionamiento comprende, al menos: dos soportes (6) desplazables verticalmente sobre los cuales se encuentran montados, con posibilidad de giro respecto a sendos ejes horizontales (7), dos extremos opuestos de un puente (8) portador de la plataforma (5) de modelado; y unos actuadores lineales (1 1 -13) accionables de modo independiente para el desplazamiento vertical de los respectivos soportes (6) desplazables y la basculación de la plataforma (5) en sentidos opuestos respecto a la horizontal. Three-dimensional printer, according to claim 1, characterized in that the drive device comprises, at least: two vertically movable supports (6) on which they are mounted, with the possibility of rotation with respect to two horizontal axes (7), two opposite ends of a bridge (8) carrying the modeling platform (5); and linear actuators (1 1 -13) independently operable for the vertical displacement of the respective movable supports (6) and the tilting of the platform (5) in opposite directions with respect to the horizontal.
Impresora tridimensional, según la reivindicación 2, caracterizada porque los actuadores lineales comprenden unos casquillos roscados (13) fijados a los respectivos soportes (6) desplazables y montados sobre sendos husillos (1 1 ) verticales conectados a sendos motores (12) paso a paso de accionamiento independiente. Three-dimensional printer, according to claim 2, characterized in that the linear actuators comprise threaded bushings (13) fixed to the respective movable supports (6) movable and mounted on two vertical spindles (1 1) connected to two motors (12) step by step of independent drive
Impresora tridimensional, según las reivindicaciones 2 y 3, caracterizada porque los soportes (6) desplazables comprenden sendos cojinetes lineales (9) montados con posibilidad de desplazamiento longitudinal sobre sendas guías verticales (10). Three-dimensional printer, according to claims 2 and 3, characterized in that the movable supports (6) comprise two linear bearings (9) mounted with the possibility of longitudinal displacement on vertical guides (10).
PCT/ES2015/070111 2014-02-19 2015-02-18 Three-dimensional printer WO2015124819A1 (en)

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ES201430222A ES2461942B1 (en) 2014-02-19 2014-02-19 3-D printer

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GB2617595A (en) * 2022-04-13 2023-10-18 Thales Holdings Uk Plc Adaptive lifting of build platform for additive manufacturing

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ES2461942B1 (en) 2014-12-12

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