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WO2024177572A1 - Dispositif de nettoyage - Google Patents

Dispositif de nettoyage Download PDF

Info

Publication number
WO2024177572A1
WO2024177572A1 PCT/SG2024/050092 SG2024050092W WO2024177572A1 WO 2024177572 A1 WO2024177572 A1 WO 2024177572A1 SG 2024050092 W SG2024050092 W SG 2024050092W WO 2024177572 A1 WO2024177572 A1 WO 2024177572A1
Authority
WO
WIPO (PCT)
Prior art keywords
cleaning device
cleaning
plates
removeable
rotation assembly
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/SG2024/050092
Other languages
English (en)
Inventor
Adam Andrew WISHNEY
Boyle SUWONO
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.)
Structo Pte Ltd
Original Assignee
Structo Pte Ltd
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 Structo Pte Ltd filed Critical Structo Pte Ltd
Publication of WO2024177572A1 publication Critical patent/WO2024177572A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/35—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • 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
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • 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
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B33Y40/20—Post-treatment, e.g. curing, coating or polishing
    • 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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/357—Recycling
    • 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
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • 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
    • B33Y99/00—Subject matter not provided for in other groups of this subclass

Definitions

  • the invention relates to a cleaning device for models produced by additive manufacturing.
  • Additive manufacturing can be used to construct three- dimensional, 3D, objects.
  • One use of such 3D objects is to serve as a mould.
  • the additive manufacturing process leads to a 3D shape, over which a flexible sheet can then be placed, to shape the sheet.
  • Additive manufacturing is alternatively known as ‘three-dimensional (3D) printing’, such as polymerising resin to form objects.
  • Printed 3D objects need to be cleaned before curing.
  • 3D printed objects are cleaned by rinsing in solvents such as I PA (isopropyl alcohol).
  • solvents such as I PA (isopropyl alcohol).
  • I PA isopropyl alcohol
  • the washing step is also labour-intensive.
  • using such solvents is also ineffective in complete removing of excess resin from the printed objects.
  • the invention provides a cleaning device for cleaning one or more 3D models printed by an additive manufacturing device onto a build plate of the additive manufacturing device, the cleaning device comprising: a base, and an outer wall; an inner cleaning cavity located within the outer wall, at least one removeable rotation assembly within the cleaning cavity for receiving one or more build plates from a 3D printing device, with one or more 3D models mounted on to the one or more build plates; wherein the removeable rotation assembly positions the one or more build plates at an operational angle between 10° and 60°, with respect to a base of the cleaning device; wherein, in operation of the cleaning device the removeable rotation assembly is rotated so that excess material is removed from the one or more 3D models mounted on to the one or more build plates.
  • the outer wall of the cleaning device comprises front and back plates, and two side plates, and wherein the front and back plates and the two side plates are fixed to the device base.
  • the removeable rotation assembly comprises a rotational shaft that has a first part with a circular outer cross section, and a hexagonal inner cross section. This self- centering arrangement ensures even weight distribution and accurate positioning of the rotor for smooth and safe operation.
  • the rotational shaft has a second part at the end of the first part with a conical cross section.
  • the operational angle may be between 10° and 60°, both angles inclusive. Preferably, the operational angle is between 25° and 55°. In a preferred embodiment of the invention the rotation of the removeable rotation assembly is between 300- 1500 R PM.
  • the cleaning device further comprises a top plate, connected to the outer wall of the cleaning device to operate as a lid to access the cleaning cavity.
  • the cleaning device further comprises a retractable cover for covering a lock securing the top plate to the cleaning cavity.
  • the at least one removeable rotation assembly is secured to the base of the cleaning device using one or more ball catches, which enables easy and secure mounting.
  • the cleaning device further comprises a motor for driving the at least one removeable rotation assembly.
  • the cleaning device further comprises a vibration sensor for detecting vibration of the cleaning device whilst the cleaning device is operational.
  • the vibration sensor comprises a light sensor attached to the base of the cleaning device to determine vibrations of a motor for driving the removable rotation assembly.
  • the base plate, front, and back plates, and the two side plates are comprised of at least one of anodized aluminium plates or stainless-steel plates.
  • the top plate may comprise of at least one of anodized aluminium plates or stainless-steel plates.
  • the cleaning device further comprises an emergency stop control.
  • the cleaning device further comprises a removeable liquid reservoir within the cleaning cavity to receive the excess material removed from the one or more 3D printed models during rotation. Since the removed material may be hazardous, the user can retrieve the excess material safely and easily for disposal.
  • Fig. 1 shows a perspective view of the cleaning device according to an embodiment of the invention.
  • Fig. 2 is a side view of the cleaning device according to an embodiment of the invention.
  • Fig. 3 shows a cross section of the interior of the cleaning device along line H-H of Fig. 2.
  • Fig. 4 is a perspective view of the removable rotating assembly with two build plates according to an embodiment of the invention.
  • Fig. 5 is a perspective view of the cleaning device with a cut-away section to show the interior of the device.
  • Fig. 6(a) is an alternative perspective view of the cleaning device with a cut-away section.
  • Fig. 6(b) is a close up of the highlighted region of the device of Fig. 6(a).
  • Fig. 7 is a cross sectional review of the interior components of the cleaning device according to an embodiment of the invention.
  • Fig. 9 is a cross-sectional view along line B-B of Fig. 8.
  • Fig. 10 is a close up of region C from Fig. 8.
  • Fig. 11 is a perspective view of a cleaning device according to an embodiment of the invention showing a removable rotating assembly with three build plates.
  • This invention relates to a device (centrifuge spinner) where 3D printed models are cleaned by spinning (centrifuge cleaning).
  • the device comprises a rotor to which 3D printed models are mounted for the models to spin (and shun off excess resin) when the rotor rotates.
  • the build plates are then spun by the device, while they are positionmounted to the rotor at an angle X (between 15 degrees and 60 degrees).
  • the build plates may be mounted on the plate holders of a rotational assembly by magnets and/or clamps. Instead of mounting, the build plates may be held in place on the plate holders by centrifugal force and friction. This allows the build plates to be quickly and easily loaded and unloaded from the plate holders for high throughput processing.
  • the rotor may contain pins for aligning and holding the build plates in position.
  • Fig. 1 shows a perspective view of the cleaning device 400 according to an embodiment of the invention.
  • the cleaning device 400 is substantially cuboid, but other shapes may be possible, such as rectangular, or circular for example.
  • the device 400 has side walls 402, base 408, top lid 406, front 404 and back 420, the side walls 402 sit on feet 430, with one foot in each corner of the base 408.
  • the back 420, sides 402 and bottom 408 are made of metal, typically anodized aluminium.
  • the front 404 is preferably a steel fascia, and has a handle recess 416, located below the handle 414 in the top lid 406.
  • integrated display control panel and membrane keypad 418 are also shown.
  • a retractable slide cover for covering a device lock which will secure the lid to the front of the cleaning device. This retractable slide cover will prevent resin, which will be dripping from the build plates when they are loaded into the cleaning device, from going into the lock as they are transported into the device.
  • the keypad allows for control of speed and time, with this information shown in the display.
  • a handle 412 of drawer 422 which slides out of the device and will collect liquid in the device 400 when the device is operational.
  • Fig. 2 is a back view of the cleaning device according to an embodiment of the invention.
  • Fig. 3 shows a cross section of the interior of the cleaning device along line H-H of Fig. 2.
  • the device has base 408, that sits on feet 430, and side walls 402 and top 406.
  • cavity 550 Within the cleaning device is cavity 550, and removeable rotation assembly 500 positioned within the cavity 550.
  • the cavity has side walls 510 and 512 and slanted base walls 514 and 516.
  • the slanted bases are of different lengths, but there is no restriction on the size or configuration of the slanted base walls 514, 516.
  • the slanted base walls meet at drain hole 518, which is connected by tube 520 to liquid container 522.
  • the removeable rotation assembly 500 comprises a rotation shaft connector 502, and plate holder 530. These will be described in more detail in Figs. 4 to 7.
  • One or more build plates 600 containing 3D models that have been produced in an additive manufacturing device are held on the plate holder 530 of the removeable rotation assembly 500.
  • the 3D printed models are cleaned by spinning (centrifuge cleaning) the rotation assembly within the cavity 550, so that excess resin used in the build process is removed from the build plates, will flow down from the side walls of cavity 550, along the slanted base walls 514, 516 to drain 518, and will pass through tube 520 to be collected in the liquid container 522.
  • the liquid container 522 can be removed from the cleaning device using handle 412, so that the container can be emptied, and in some cases the resin can be reused.
  • the plate holder 530 is angled with respect to the base 408.
  • the angle X may be varied between 10° and 60°, for example 15° or 25°. This angled arrangement facilitates the flow of the resin across the plate into the cavity for collection in the liquid container 522. If the build plates are mounted on the rotation assembly by magnets or friction, the build plates containing print objects are loaded onto the side of the plate holders that face inwards (towards the rotational shaft) to avoid accidental dislodgement of the build plates during spinning. Alternatively, the build plates may be secured by clamps and arranged differently.
  • the device 400 also includes a motor 524, which is used to control the rotation of the shaft 502.
  • the motor is a 75 VDC servo motor.
  • the rotation speed is between 300-1500 RPM.
  • the spinning of the removable rotation assembly has an acceleration profile of 75 rpmsec 2 .
  • Fig. 4 is a perspective view of part of the removable rotation assembly 500. This view shows two build plates 600 in position on the plate holder 530.
  • Plate holder 530 has a substantially flat base 532, and triangular shaped plate supports 534.
  • the plate supports 534 are angled with respect to the base plate of the plate support.
  • the triangular plate supports are triangles, but in alternative embodiments, the plate support 534 may be cut out in the centre, to reduce the weight of the plate support 534.
  • the plate holder can support two build plates, but in other embodiments of the invention, the plate holder may support one build plate, or multiple build plates, for example three build plates.
  • the plate supports 534 have securing latches 536, at the top of the plate supports 534.
  • the build plates 600 will be secured in position on the plate holder 530 by the latches 536.
  • the rotation shaft connector 502 is underneath the base 532, and in a preferred embodiment of the invention, has a hexagonal cross section, as shown in more detail in Fig. 9.
  • This removable rotation assembly 500 is completely removable from the cleaning device 400. In this way a user can have multiple assemblies loaded and ready to insert into the cleaning device for removal of the resin from the build plates 600.
  • the removable rotation assembly is held in place in the cleaning device by one or more ball catches for easy mounting.
  • Fig. 5 is a perspective view of the cleaning device 400 with a cut-away section to show the interior of the device and fork light sensor 900.
  • Fig. 6(a) is an alternative perspective view of a cleaning device 400 with a cut-away section, showing fork light sensor 900, arm 903 of the sensor, and motor cage 906.
  • Fig. 6(b) is a closeup of the highlighted region of the device of Fig. 6(a). This shows a fork light sensor 900 to detect vibrations of the cleaning device 400.
  • An arm 902 of the sensor is attached to a motor cage 906 which is subject to vibration, and the light sensor 900 is attached to the base plate 408 of the cleaning device 400.
  • the arm 902 has a pre-determined slot 904 cut in it. If the motor cage vibrates too much, the slot will cut the light beam from the sensor 900, sending a signal to the device 400 that the vibrations are high.
  • Fig. 7 is a cross sectional review of the removable rotation assembly 500 connected to the motor 950 of the cleaning device according to an embodiment of the invention.
  • This view shows the removable rotation assembly 500 comprising flat base plate 532, and support plates 534, and shaft connector 502, motor cage 906, and motor 950.
  • the rotational shaft connector has a first section which has a hexagonal inner cross section, and a circular outer cross section.
  • the hexagonal section 558 provides rotational torque to the shaft.
  • the rotational shaft 502 has a conical cross section 562. This conical part of the shaft is self-centering.
  • Fig. 8 is an alternative cross-sectional view of the interior components, along section A-A of Fig. 7.
  • This figure shows the removable rotation assembly 500 comprising base plate 532 and support plates 534, with latches 536.
  • the motor 950 is within cage 906 as shown.
  • the shaft 502 has an interior hexagonal cross section 558, and an exterior circular cross section 560.
  • Fig. 9 is a cross-sectional view along line B-B of Fig. 8, showing that this part of the rotational shaft connector has an interior hexagonal cross section 558, and an exterior circular cross section 560.
  • Fig. 10 is a close-up of region C from Fig. 8, showing the rotational shaft connector with a first section which has a hexagonal inner cross section 558, and a circular outer cross section 560.
  • the hexagonal section provides rotational torque to the shaft.
  • the rotational shaft has a conical cross section 562, this conical part of the shaft is self-centering.
  • Fig. 11 shows an arrangement of three build plates 702 mounted to the removable rotation assembly 700.

Landscapes

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

Abstract

La présente invention concerne un dispositif de nettoyage pour nettoyer un ou plusieurs modèles 3D imprimés par un dispositif de fabrication additive sur une plaque de construction du dispositif de fabrication additive, le dispositif de nettoyage comprenant : une base et une paroi externe ; une cavité de nettoyage interne située à l'intérieur de la paroi externe ; au moins un ensemble de rotation amovible à l'intérieur de la cavité de nettoyage pour recevoir une ou plusieurs plaques de construction à partir d'un dispositif d'impression 3D, avec un ou plusieurs modèles 3D montés sur les plaques de construction ; l'ensemble de rotation amovible positionnant les plaques de construction à un angle de fonctionnement entre 10° et 60°, par rapport à une base du dispositif de nettoyage ; lors du fonctionnement du dispositif de nettoyage, l'ensemble de rotation amovible étant mis en rotation de telle sorte qu'un excès de matériau est retiré du ou des modèles 3D montés sur la ou les plaques de construction.
PCT/SG2024/050092 2023-02-23 2024-02-21 Dispositif de nettoyage Ceased WO2024177572A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG10202300471U 2023-02-23
SG10202300471U 2023-02-23

Publications (1)

Publication Number Publication Date
WO2024177572A1 true WO2024177572A1 (fr) 2024-08-29

Family

ID=92501740

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2024/050092 Ceased WO2024177572A1 (fr) 2023-02-23 2024-02-21 Dispositif de nettoyage

Country Status (1)

Country Link
WO (1) WO2024177572A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206154726U (zh) * 2016-09-26 2017-05-10 湖北工业大学 一种双转轴3d打印平台
WO2018226164A2 (fr) * 2017-06-09 2018-12-13 Structo Pte Ltd Procédé et dispositif de fabrication additive automatisée décentralisée
US20200139434A1 (en) * 2018-11-05 2020-05-07 Hamilton Sundstrand Corporation Adapter for use with post additive manufacturing systems
US10814360B2 (en) * 2015-07-30 2020-10-27 Compagnie Generale Des Etablissements Michelin Method for the dry-cleaning of additive manufacturing plates
WO2021010954A1 (fr) * 2019-07-15 2021-01-21 Hewlett-Packard Development Company, L.P. Nettoyage de matériau de construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10814360B2 (en) * 2015-07-30 2020-10-27 Compagnie Generale Des Etablissements Michelin Method for the dry-cleaning of additive manufacturing plates
CN206154726U (zh) * 2016-09-26 2017-05-10 湖北工业大学 一种双转轴3d打印平台
WO2018226164A2 (fr) * 2017-06-09 2018-12-13 Structo Pte Ltd Procédé et dispositif de fabrication additive automatisée décentralisée
US20200139434A1 (en) * 2018-11-05 2020-05-07 Hamilton Sundstrand Corporation Adapter for use with post additive manufacturing systems
WO2021010954A1 (fr) * 2019-07-15 2021-01-21 Hewlett-Packard Development Company, L.P. Nettoyage de matériau de construction

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