WO2020007831A1 - Dispositif d'homogénéisation de formulations de résine - Google Patents

Dispositif d'homogénéisation de formulations de résine Download PDF

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Publication number
WO2020007831A1
WO2020007831A1 PCT/EP2019/067689 EP2019067689W WO2020007831A1 WO 2020007831 A1 WO2020007831 A1 WO 2020007831A1 EP 2019067689 W EP2019067689 W EP 2019067689W WO 2020007831 A1 WO2020007831 A1 WO 2020007831A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin formulation
holder
drive shaft
resin
container
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2019/067689
Other languages
German (de)
English (en)
Inventor
Jens TRÄGER
Britta MEISTER-PETUKER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Muehlbauer Technology GmbH
Original Assignee
Muehlbauer Technology GmbH
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 Muehlbauer Technology GmbH filed Critical Muehlbauer Technology GmbH
Publication of WO2020007831A1 publication Critical patent/WO2020007831A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B01F31/22—Mixing the contents of independent containers, e.g. test tubes with supporting means moving in a horizontal plane, e.g. describing an orbital path for moving the containers about an axis which intersects the receptacle axis at an angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/80—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations
    • B01F31/86—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations with vibration of the receptacle or part of it

Definitions

  • the invention relates to a device for homogenizing resin formulations, in particular for 3D printing, and the use of a corresponding device for homogenizing resin formulations, in particular in connection with 3D printing.
  • 3D printing methods are known for creating objects based on computer models, with which material is applied and solidified layer by layer, so that the desired object is present at the end of the printing process.
  • Some of the printing processes use liquid resin mixtures which contain solids and which can be selectively cured by exposure as the starting material.
  • These printing processes include stereolithography (SLA) and digital light processing (DLP), which are used, for example, in the manufacture of dental parts.
  • the resin mixtures are available in different colors and are regularly filled in 0.5 or 1 liter bottles. They are filled into a 3D printer as needed and used in a known manner to create objects based on a three-dimensional computer model, for example a dental part.
  • the resin mixture used by the printer is as homogeneous as possible. Due to the solids contained in the resin mixtures, sedimentation of the solids occurs regularly. Known approaches to prevent or at least delay the sedimentation of the resin mixture cannot be used here, since the resin mixture could then no longer be used in the printers currently available on the market due to the necessary change in the formulation. For example, a change in the rheology with regard to the resting structure of the resin mixture is fundamentally not possible, since this would also lead to a change in the yield point that is unsuitable for 3D printing.
  • the viscosity of the resin mixture for the printing processes mentioned above must also be kept in a relatively narrow range, so that an increase in viscosity is generally not an option. In most cases, it is usually not possible to adjust the density of the resin mixture and solids.
  • the company Nextdent BV, Soesterberg, NL has introduced the mixer "LC-3DMixer", with which the resin mixtures in the bottles can be homogenized according to the principle of a roller block.
  • LC-3DMixer In order to mix the resin mixtures sufficiently, a processing time of two and a half or one hour is prescribed, depending on the application, so that a short-term homogenization of a resin mixture for immediate use is not possible.
  • the object of the present invention is to provide a device and a use of this device with which a reproducible homogenization of a resin formulation for 3D printing is possible in a short time.
  • the invention relates to a device for homogenizing resin formulations for 3D printing comprising a holder for receiving a resin formulation container with a capacity of at least 500 ml, the holder tion being so eccentrically connected to a vertical drive shaft that the holder during rotation of the Drive shaft in a circular movement around the axis of the drive shaft oscillates, the holder being moved at high speed in a circular path without a resin formulation container accommodated therein itself rotating.
  • the invention further relates to a use of the device according to the invention for homogenizing a resin formulation in a resin formulation container, the resin formulation container with the resin formulation contained therein being inserted into the holder of the device and then being oscillated in a circular movement about the axis of the drive shaft.
  • the invention has recognized that for the homogenization of resin formulations for 3D printing in the resin formulation, in which they are also stored, a mixture according to the vortex principle, which consists of vortex mixers for mixing solutions in reaction vessels, such as test tubes, Eppendorf cups or microtiter plates from biological and biochemical laboratories is known, is advantageous.
  • the container filled with the solution to be mixed is moved in a circular path at high speed without the container itself rotating. Since the vessels that can be used with known pre-mixers like only a little Fassungsver and thus have only a low weight even when completely filled, only a circular oscillating plate is often provided, to which the corresponding vessels are stopped by hand.
  • the vortex mixers developed for laboratories are unsuitable for the homogenization of resin formulations, which are usually only available in resin formulation containers with a capacity of 500 ml or more, and the required mixing time.
  • the device according to the invention has a holder for holding such a resin formulation container with a capacity of 500 ml or more and thus enables the resin formulation contained therein to be homogenized.
  • the holder which can accommodate a resin formulation container at least sufficiently securely that no further attachment of the received resin formulation container or retention is required, even when the device is in operation, is connected eccentrically to a vertical drive shaft such that the holder rotates At the drive shaft oscillates in a circular motion around the axis of the drive shaft.
  • an ultrasonic transmitter for introducing vibrations of the holder and / or the drive shaft is provided in the direction of the axis of the drive shaft.
  • the resin formulation contained in the resin formulation container can not only oscillate in a circular manner by means of an appropriate ultrasound generator, but can also be vibrated in the vertical direction at a frequency in the ultrasound range. In this way, in particular solids contents in the resin formulation can be distributed even better.
  • the device has a tempering device for tempering a resin formulation container taken.
  • the temperature control device preferably has a temperature sensor for determining the temperature of the resin formulation and / or the resin formulation container. With the aid of the temperature sensor, compliance with a target temperature can be ensured in a known manner by regulating the temperature control device on the basis of the deviation from the target temperature and the actual temperature detected by the temperature sensor.
  • the preferred temperature for homogenization can be different for each resin formulation. In general, however, it is above normal room temperatures, so that it may be sufficient if the tempering device for heating the resin formulation or the resin formulation container is formed.
  • the holder In order to ensure the desired secure reception of the resin formulation container, it is preferred if the holder is designed in the form of a cup for the partial reception of a resin formulation container.
  • clamping elements can be provided for a non-positive connection with the resin formulation container.
  • the clamping elements can, for example, be elastically deformable clamps directed inward.
  • the holder In order to be able to use the device with different shapes and configurations of resin formulation containers, it is preferred if the holder is designed to be exchangeable. It is then possible to provide different holders for different resin formulation containers and to use them if necessary.
  • the device can have a programmable logic control unit for controlling the rotation of the drive shaft, the ultrasonic transducer and / or the temperature control device.
  • the control unit is then programmable such that the operating parameters of the device are adapted to the resin formulation to be homogenized. It is particularly preferred if the control unit has a detection unit, preferably an RFID reader or an optical reader, such as a barcode scanner, for detecting an identifier of a resin formulation container inserted into the receptacle or to be inserted after detection, and is designed to to load and execute a homogenization program from the memory as a function of the detected identifier. If a corresponding identifier of the resin formulation container is detected, the suitable operating parameters for homogenizing the resin formulation contained therein can then be loaded from the memory, thus eliminating the need for manual programming.
  • the device has an ultrasonic transmitter and / or a temperature control unit, it is basically possible to activate it at the same time as the drive shaft rotates. But it is also possible to operate them in accordance with a predetermined homogenization program in succession and / or only partially at the same time. For example, it is conceivable to first heat a resin formulation to a desired target temperature and / or possibly to loosen existing sediments by activating the ultrasonic generator before the drive shaft is rotated.
  • the homogenization program can be selected and executed, for example, via an identifier of a homogenization container.
  • the rotation of the drive axle with a rotation speed of 500 to 4000 rpm, preferably from 1000 to 3500 rpm and / or is limited to a time duration of a maximum of 10 minutes, preferably of a maximum of 5 minutes is. It is further preferred if the temperature control device heats the resin formulation and / or the resin formulation container to a predetermined target temperature, preferably 25 ° C or 35 ° C.
  • the device may further comprise a fill level sensor for detecting the amount of the resin formulation in a resin formulation container used in the receptacle.
  • the filling quantity sensor can be designed to determine the filling quantity by the weight of a resin formulation container inserted into the receptacle.
  • the fill level can be determined, for example, from the difference between the measured weight and the weight of the empty resin formulation container, a standard value for the weight of the empty resin formulation container, a value specified by the user or an assigned value based on the detection unit of the resin formulation container Value can be used.
  • the filling quantity sensor can be designed as a filling level sensor.
  • the fill level of the resin formulation in the resin formulation container can be determined optically.
  • the fill level sensor comprises an ultrasound sensor which determines the fill level on the basis of the transit times of ultrasonic waves introduced into the resin formulation. The ultrasound waves in question can - if this is designed as a transceiver - from the Ultra
  • the wall of the resin formulation container in the state inserted into the receptacle must be permeable to the ultrasound waves at least in the area of the ultrasound sensor so that the fill level of the resin formulation located therein can be detected. If this is not the case, only the fill level cannot be determined automatically, while the other functions of the device are still fully available. In this case, a standard value can be used or the user can be asked to enter an approximate level, which the homogenization process is based on.
  • the determined or predefined fill level is taken into account by the control unit when selecting a stored homogenization program or a stored homogenization program is adapted by the control unit according to the fill level. For example, depending on the level, especially when the level is low, the proportion of vertical vibrations can be increased. As a result, good homogenization of the resin formulation can be ensured even with partially emptied resin formulation containers.
  • FIG. 1 is a schematic representation of an embodiment example of a device according to the invention.
  • FIG. 1 shows an exemplary embodiment of a device according to the invention for homogenizing resin formulations for 3D printing.
  • the device comprises a cup-shaped holder 2, into which a resin formulation container 20, in this case a 1 liter bottle, can be inserted.
  • a resin formulation container 20 in this case a 1 liter bottle
  • parts of the outer wall of the bracket 2 are formed as inwardly directed clamps 3, the elastically yielding the resin formulation container 20 secure non-positively in the bracket 20.
  • the bracket 2 is eccentrically connected to the vertically aligned drive shaft 4.
  • the actual Wel le 5 which also forms the axis 4 'of the drive shaft, on the bracket 2 facing end of a boom 6, on which the bracket 2 is attached via a central pin 7 via a La ger 8.
  • the pin 7 and thus the holder 2 describe a circular movement, the holder 2 being fundamentally not set in rotation itself due to the bearing 8.
  • a guide pin 10 arranged thereon is guided in an elongated guide 11 in the housing 12 of the device 1.
  • an ultrasonic transmitter 13 is integrated with which the holder 2 can be set in vertical vibration.
  • a hot plate is arranged as a temperature control unit 14 for the resin formulation container 20 and thus the resin formulation contained therein, which continues a temperature sensor 15 for detecting the temperature of the resin formulation container 20.
  • a filling quantity sensor 19 is integrated in the temperature control unit 14.
  • the filling quantity sensor 19 is designed as an ultrasonic sensor, more precisely as an ultrasonic transceiver, which can introduce ultrasonic waves through the wall of the resin formulation container 20 into the resin formulation and can measure the transit time of the ultrasonic waves reflected on the surface of the resin formulation.
  • the fill level of the resin formulation in the resin formulation container 20 results from this runtime, which directly reflects the fill quantity.
  • the drive unit 9, the ultrasonic transmitter 13 and the temperature control unit 14 are connected via control lines (not shown) to the programmable logic control unit 16 and are controlled by the latter.
  • the filling quantity sensor 19 is also connected to the control unit 16 via a data line (not shown) in order to transmit the determined filling quantity to the control unit 16.
  • the control unit 16 furthermore has an RFID reading module 17 and a memory 18. Various homogenization programs are stored in the memory 18.
  • the control unit 16 is designed to read an RFID chip 21 arranged on the resin formulation container 20 when inserting a resin formulation container 20 into the holder 2.
  • An identifier is stored on the RFID chip 21, which identifies the resin formulation contained in the resin formulation container 20.
  • the filling quantity in the resin formulation container 20 is determined via the filling quantity sensor 19, the correction factors for the filling quantity, for example the wall thickness or the shape of the filling quantity, which may be stored in the memory 18, being determined using the identifier read out via the RFID chip 21 Map the receiving space of the resin formulation container 20, be drawn here in order to derive the filling quantity as exactly as possible from the filling level originally determined with the filling quantity sensor 19.
  • the control unit 16 then checks whether a suitable ge for the read out identifier and / or the determined fill quantity is stored in the homogenization program and then controls the drive unit 9, the ultrasonic transmitter 13 and the temperature control unit 14 according to the loaded homogenization program, which is a ensures sufficient homogenization of the resin formulation contained in the resin formulation container 20 tion.
  • Different homogenization programs can be stored for different fill quantities, or a homogenization program stored for a specific identifier can be adapted to the determined fill quantity as a parameter via the fill quantity.
  • the resin formulation container 20 should first be heated to 25 ° C. before the drive unit 9, the drive shaft is operated at 2500 rpm with simultaneous activation of the ultrasound converter 13 for 5 minutes.
  • the temperature control unit 14 is activated until the target temperature is reached.
  • the temperature control unit 14 is deactivated and the drive unit 9 with the desired number of revolutions as well as the ultrasonic transducer 13 are activated.
  • control unit 16 Five-minute timer. After the timer expires, drive unit 9 and ultrasonic transducer 13 are deactivated.
  • the resin formulation container 20 at this time contains fully homogenized resin formulation.
  • the resin formulation container 20 can then be removed and the resin formulation contained therein can be fed in the usual way to a 3D printer (not shown), for example for producing a valley part.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

L'invention concerne un dispositif (1) d'homogénéisation des formulations de résine, en particulier pour l'impression 3D, et l'utilisation d'un dispositif (1) correspondant d'homogénéisation des formulations de résine, en particulier en liaison avec l'impression 3D. Le dispositif (1) comprend un support (2) pour recevoir solidement un récipient de formulation de résine (2) ayant une capacité d'au moins 500 ml, le support (2) étant relié excentriquement à un arbre d'entraînement (4) de cette manière, de sorte que le support (2) oscille en un mouvement circulaire autour de l'axe (4') de l'arbre d'entraînement (4) lorsque l'arbre d'entraînement (4) tourne, le support (2) étant déplacé à grande vitesse dans un trajet circulaire sans qu'un récipient de formulation de résine (20) lui-même y tourne. Pour utiliser un dispositif (1) correspondant, un récipient de formulation de résine (20) contenant la formulation de résine est inséré dans le support (2) du dispositif (1) et oscille ensuite dans un mouvement circulaire autour de l'axe (4') de l'arbre d'entraînement (4).
PCT/EP2019/067689 2018-07-03 2019-07-02 Dispositif d'homogénéisation de formulations de résine Ceased WO2020007831A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018116093.3A DE102018116093A1 (de) 2018-07-03 2018-07-03 Vorrichtung zur Homogenisierung von Harzformulierungen
DE102018116093.3 2018-07-03

Publications (1)

Publication Number Publication Date
WO2020007831A1 true WO2020007831A1 (fr) 2020-01-09

Family

ID=67253858

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/067689 Ceased WO2020007831A1 (fr) 2018-07-03 2019-07-02 Dispositif d'homogénéisation de formulations de résine

Country Status (2)

Country Link
DE (1) DE102018116093A1 (fr)
WO (1) WO2020007831A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202023100207U1 (de) 2023-01-17 2023-02-06 Mühlbauer Technology Gmbh Vorrichtung zur Homogenisierung von Harzformulierungen

Citations (11)

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US3061280A (en) 1959-04-06 1962-10-30 Kraft Scient Corp Apparatus for mixing fluent material
DE1279986B (de) * 1966-09-19 1968-10-10 Biotec Aktiebolag Ruetteltisch
US3850580A (en) * 1973-03-15 1974-11-26 Sybron Corp Laboratory mixer
DE3319574A1 (de) * 1982-06-05 1983-12-08 Infors AG, 4103 Bottmingen Schuettelmaschine
DE4428379A1 (de) * 1993-08-12 1995-02-16 Berger Hans Werner Vorrichtung zum Mischen, Schütteln, Rühren und/oder Emulgieren von Flüssigkeiten
US6190032B1 (en) * 1998-04-21 2001-02-20 Eyela-Chino Inc. Shaking machine with rotation regulating coupling
GB2371767A (en) * 2001-02-02 2002-08-07 Labman Automation Ltd Dissolving materials by application of agitation and ultrasound
EP1832336A1 (fr) * 2006-03-09 2007-09-12 Eppendorf Ag Dispositif de mélange, en particulier de contenus de récipients de laboratoire
EP2450099A1 (fr) * 2010-11-03 2012-05-09 Eppendorf Ag Dispositif de mélange doté d'un stockage pour un dispositif de réception
EP3222990A1 (fr) * 2016-03-23 2017-09-27 Siemens Healthcare Diagnostics Products GmbH Procede de melange de liquides reactifs dans un appareil d'analyse automatique
WO2017189018A2 (fr) * 2016-04-30 2017-11-02 Hewlett-Packard Development Company, L.P. Mélange d'un matériau de construction en poudre pour fabrication additive

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US5746981A (en) * 1996-03-29 1998-05-05 Ricoh Company, Ltd. Method and apparatus for mixing two or more kinds of resin material liquids
JP2002196006A (ja) * 2000-12-27 2002-07-10 Olympus Optical Co Ltd 自動分析装置
GB0116920D0 (en) * 2001-07-11 2001-09-05 Sulzer Vascutek Ltd Delivery system
WO2007005262A1 (fr) * 2005-06-29 2007-01-11 Cannon John F Remorque de transport de produit visqueux
DE102006049347A1 (de) * 2006-10-19 2008-04-30 Hte Ag The High Throughput Experimentation Company Vorrichtung und Verfahren zur Herstellung von Substanzformulierungen - Formulierungsstation
JP5687038B2 (ja) * 2010-11-30 2015-03-18 株式会社シンキー 遠心機

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061280A (en) 1959-04-06 1962-10-30 Kraft Scient Corp Apparatus for mixing fluent material
DE1279986B (de) * 1966-09-19 1968-10-10 Biotec Aktiebolag Ruetteltisch
US3850580A (en) * 1973-03-15 1974-11-26 Sybron Corp Laboratory mixer
DE3319574A1 (de) * 1982-06-05 1983-12-08 Infors AG, 4103 Bottmingen Schuettelmaschine
DE4428379A1 (de) * 1993-08-12 1995-02-16 Berger Hans Werner Vorrichtung zum Mischen, Schütteln, Rühren und/oder Emulgieren von Flüssigkeiten
US6190032B1 (en) * 1998-04-21 2001-02-20 Eyela-Chino Inc. Shaking machine with rotation regulating coupling
GB2371767A (en) * 2001-02-02 2002-08-07 Labman Automation Ltd Dissolving materials by application of agitation and ultrasound
EP1832336A1 (fr) * 2006-03-09 2007-09-12 Eppendorf Ag Dispositif de mélange, en particulier de contenus de récipients de laboratoire
EP2450099A1 (fr) * 2010-11-03 2012-05-09 Eppendorf Ag Dispositif de mélange doté d'un stockage pour un dispositif de réception
EP3222990A1 (fr) * 2016-03-23 2017-09-27 Siemens Healthcare Diagnostics Products GmbH Procede de melange de liquides reactifs dans un appareil d'analyse automatique
WO2017189018A2 (fr) * 2016-04-30 2017-11-02 Hewlett-Packard Development Company, L.P. Mélange d'un matériau de construction en poudre pour fabrication additive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202023100207U1 (de) 2023-01-17 2023-02-06 Mühlbauer Technology Gmbh Vorrichtung zur Homogenisierung von Harzformulierungen
DE102023135460A1 (de) 2023-01-17 2024-07-18 Mühlbauer Technology Gmbh Vorrichtung zur Homogenisierung von Harzformulierungen

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Publication number Publication date
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