EP2931440A1 - Dispositif de nettoyage pour éliminer la poudre qui adhère à des pièces ou modèles - Google Patents

Dispositif de nettoyage pour éliminer la poudre qui adhère à des pièces ou modèles

Info

Publication number
EP2931440A1
EP2931440A1 EP13805741.9A EP13805741A EP2931440A1 EP 2931440 A1 EP2931440 A1 EP 2931440A1 EP 13805741 A EP13805741 A EP 13805741A EP 2931440 A1 EP2931440 A1 EP 2931440A1
Authority
EP
European Patent Office
Prior art keywords
component
powder
cleaning device
housing
cell
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.)
Withdrawn
Application number
EP13805741.9A
Other languages
German (de)
English (en)
Inventor
Andreas Hartmann
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.)
Voxeljet AG
Original Assignee
Voxeljet AG
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 Voxeljet AG filed Critical Voxeljet AG
Publication of EP2931440A1 publication Critical patent/EP2931440A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/06—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action

Definitions

  • the present invention relates to a cleaning device for removing adhering powder to components or models, which have been prepared in the layer-building process of solidified powder.
  • three-dimensional objects, components or models can be produced with the aid of computer data in which thin layers of loose powder material are repeatedly applied to a powder bed and each individual layer is selectively solidified into a component cross-section.
  • the individual powder layers can be applied both vertically on horizontal platforms (US 2008/0001331) or at a certain angle, which is smaller than the specific angle of repose, on horizontally moving beds (WO 201 1 127 897 A2).
  • the binding mechanism can, for example, be carried out chemically by applying very fine droplets of adhesive with precision to specified areas of the powder layers using printing technology (DE69333169T2).
  • the building process takes place in a building container with a vertically displaceable building platform as the floor (US6375874B1).
  • the construction platform is brought into the highest possible position at the beginning of the construction process and there applied a first layer of loose particulate material. After the selective solidification of this layer to a component cross section, the construction platform is lowered by one layer thickness. Subsequently, a layer of loose particulate material is again applied and in turn selectively solidified to a component cross-section. These steps are repeated until the desired three-dimensional part or model body is completely created.
  • the construction container increasingly filled with powder material.
  • Part of the loose powder is bonded to the desired part or model by the consolidation operations, while the remaining unbound and unconsolidated particulate material or powder supports the component or model against sagging and warping.
  • the component or model consisting of solidified particles or powder must not be solidified, but on the component
  • CONFIRMATION COPY or model adhering particles or powder are released. This process is called unpacking the part or model. The goal is to reuse or recycle the unbonded powder removed from the part or model for a build process.
  • a conventional vacuum cleaner for manual suction can be used. If the unpacking of the component or model takes place manually, high time losses and costs arise, which is unergonomic. In addition, the unconsolidated powder can affect the health of the workers, for example, by unwanted inhalation.
  • the device includes a rotatable around its axial axis filter device with a sheath in which a plurality of openings is arranged.
  • the components to be liberated from unbonded powder are introduced by means of a mechanical feed device into an inner region of the filter device, wherein the filter device is then rotated about its axial axis so that the unbonded powder is due to the components rubbing against one another in the filter device or due to centrifugal forces detached from the component and can be fed through the openings through a collecting device. Due to the non-directional movements of the components, in particular by repeated impacts on the sheathing in the course of the rotation of the filter device, however, damage to the components can occur, which are to be avoided.
  • the invention is based on the object to further develop a cleaning device of the type mentioned in such a way that the intended for the purification of unbound powder components or models are cleaned as gently and without damage.
  • the invention is based on the idea that a cell of a rotary valve in the course of its rotation with different stationary component or powder leading Openings of a housing in connection or out of connection device, to convey components through the openings in these openings suction or compressed air streams into the cell, powder particles out of the cell and optionally also the component itself out of the cell.
  • the individual process steps are therefore dependent on an overlap of a cell of the cell wheel with these openings in the housing.
  • the cleaning device includes:
  • a rotary valve disposed in the housing, which includes a cell wheel rotatable relative to the housing,
  • the compressed by the suction or compressed air flow to the screen surface component is therefore fixed to the screen surface and rotates with this or the cellular wheel, whereby relative movements between the at least one component and the feeder or the screen surface are avoided and the risk of damage to the Component sinks.
  • one and the same suction or compressed air flow therefore ensures the transport of the at least one component into the cell and for blowing off unbound powder or particulate material from the at least one component and for its transport through the screen surface into the first powder discharge opening in Casing.
  • An airflow source is therefore designed or designed so that the suction or compressed air flow generated by it is able to apply flow forces, which spend at least one component through the component insertion opening into the cell, against a sieve surface delimiting the cell and at least a part of the adherent Can clean off powder.
  • the cleaning device can be operated with low energy consumption.
  • the first powder discharge opening can communicate with a powder collecting container in which the powder dissolved by the components is collected for recycling.
  • a suction air flow is used, which is present in the first powder discharge opening, for example by a suction pump connected there. Since the first powder discharge opening is in one rotational position via the at least one screen surface with the component insertion opening in communication, the suction air flow is also in the component insertion opening and therefore can in the region of the component insertion opening located components in the cell of the cell imbibe. Such a suction air therefore exerts suction forces on the at least one component or on the powder particles by means of a pressure gradient.
  • An alternatively used compressed air flow would due to a reverse pressure differential pressure forces on the Exercise component or the powder particles. The person skilled in the art is aware of how he can generate such pressure gradient at the openings in the housing.
  • the forces necessary for this purpose can either in turn preferably originate from one and the same suction or compressed air flow of the means for generating at least one suction or compressed air flow or from the gravity of the at least one component itself or by a combination of both.
  • At least one component with adhering to it particles or powder from the construction field is sucked into the cell, for example, and separated there from unbound powder.
  • the powder released from the component remains in the suction air or compressed air stream and can be supplied via the first powder discharge opening to a reprocessing device such as sieves or mixing stations or directly to another construction process.
  • the present invention operates according to a method in which a cell receiving the at least one component in the course of a preferably continuous rotation of the cell wheel with different openings in the housing in connection or out of communication to the at least one component through preferably in the openings themselves transporting suction or compressed air streams into the cell, cleaning it and optionally also removing it from the cell of the cell wheel.
  • the method described preferably takes place in parallel in several cells of the rotary valve, which are then brought in and out of communication with the described openings by the rotation of the feeder.
  • the insertion of the at least one component through the component insertion opening into the cell takes place, the removal of at least one part of the powder adhering to the at least one component the at least one component and the transport of the removed powder through the sieve openings of the sieve surface into the first powder discharge opening by one and the same suction or compressed air flow.
  • the at least one component cleaned from adhering powder can be removed from the housing by means of its gravitational force and / or by means of a suction or compressed air flow of the means for producing at least one suction or compressed air flow.
  • the means for generating at least one suction or compressed air flow are designed such that at least one suction air flow is applied which exerts a sucking effect on the at least one component accommodated in the cell and in that the at least one suction air flow in the one rotational position preferably over the first powder discharge opening from the side facing away from the at least one component side of the screen surface and in the further rotational position preferably acts on the at least one component via the component-discharge opening of the at least one component facing side of the screen surface forth.
  • a cell receiving the at least one component is separated from the component insertion opening in the further rotational position.
  • the means for generating the at least one suction or compressed air flow are preferably designed such that the at least one suction or compressed air flow can be introduced via the component-guiding or powder-conducting openings in the housing into a cell accommodating the at least one component.
  • the suction or pressure forces preferably act exclusively on the component-leading or powder-carrying openings in the housing, without own openings would have to be provided, which introduce only a suction or compressed air flow into the cell, without at least one component and / or powder is transported with.
  • a cell of the cell wheel receiving the at least one component is formed by the means for rotating the cell wheel into a rotational position arranged between the one and the further rotational position and in connection with a hole leading to powder second powder discharge opening of the housing can be brought, and in the arranged between the one and the other rotational position rotational position by the means for generating at least one suction or compressed air flow possibly still adhering to the component remainder of the powder from the component and through the screen surface transportable into the second powder discharge opening.
  • a cell receiving the at least one component is separated from the component insertion opening and from the first powder discharge opening in the rotational position arranged between the one and the further rotational position.
  • the component-guiding and / or the powder-carrying openings in the housing can each be arranged coaxially or radially with respect to the axis of rotation of the rotary valve.
  • the center axis of the component delivery opening is preferably arranged vertically or has at least one vertical component, so that gravity can carry out or support the removal of components from the cell alone.
  • the means for rotating the cell wheel of the cell lock permanently rotationally drive the cellular wheel.
  • a control device may be provided which continuously activates the means for rotating the cell wheel of the cell sluice. This creates a continuous process by which a high number of components can be economically decompressed.
  • the screen surface can be perpendicular to a rotational axis of the rotary valve or be formed by an at least partially cylindrical screen surface, whose central axis is arranged coaxially to the axis of rotation of the rotary valve.
  • a plurality of screen surfaces can be arranged serially in the direction of flow of the suction or compressed air stream, the screen hole diameter decreasing in the throughflow sequence of the screen surfaces for separating components of different sizes and / or for separating powder particles of different sizes and those in the flow sequence
  • the screen surface last screen surface is powder-permeable, but not throughout the entire structure.
  • the plurality of sieve surfaces subdividing components accommodating cells into a plurality of chambers, wherein at least one of these chambers in the course of rotation of the cell wheel with at least one component and / or powder-conducting opening in the housing in connection or disconnected. Components and / or powder particles of different sizes can then be transported out of the cell via the component- and / or powder-carrying openings.
  • component-receiving cells of the rotary valve are designed in such a way that they are otherwise sealed in the housing with the exception of the rotational position-dependent connection to component- and / or powder-conducting openings.
  • the first powder discharge opening from the at least one component receiving cell directed suction air flow is generated, which then also acts in the component supply port to suck the at least one component in the cell and at least a portion of the unbound Clean powder.
  • a suction air stream directed from the cell accommodating at least one component is likewise produced in order to detach residual powder from the at least one component and to transport it away.
  • a suction air flow generated by a suction air device can be connected simultaneously to the first powder discharge opening, optionally to the second powder discharge opening and optionally also to the component discharge opening.
  • the at least one screen surface with the screen openings preferably made of flexible material, so as not to damage the components.
  • FIG. 1 shows an overview of the cleaning process with a cleaning device according to the invention
  • FIGS 2a to 2e a preferred embodiment of a cleaning device according to the invention, wherein
  • FIG. 2a is a view of the cleaning device from below
  • Fig.2b is a side view of the cleaning device
  • Fig.2c is a top view of the cleaning device
  • FIG. 2 d is a sectional view of the cleaning device of FIG. 1 b, wherein all connections, both on the upper side and underside as well as the direction of rotation of the cell wheel, are shown, FIG.
  • 2e is a perspective, partially broken away view of
  • FIGS. 3a to 3e show a further embodiment of a cleaning device according to the invention, wherein FIG
  • 3a is a view of the cleaning device from below
  • FIG. 3b is a side view of the cleaning device
  • 3 c is a top view of the cleaning device from above
  • FIG. 3 d is a sectional view of the cleaning device of FIG. 2 b, wherein all the connections, both on the upper side and underside as well as the direction of rotation of the cell wheel, are shown, FIG.
  • 3e is a perspective, partially broken away view of
  • FIG. 4c is a top plan view of the cleaning device
  • FIG. 4d is a sectional view of the cleaning device of FIG. 3b, with all the connections, both on the upper side and underside as well as the direction of rotation of the cell wheel, being shown, FIG.
  • 4e is a perspective, partially broken away view of
  • FIG. 6 is a perspective view of another embodiment of the invention.
  • FIG. 1 is an overview of a cleaning process in which components 14 made of solidified powder are cleaned of adhering, non-solidified or bonded powder particles in order to "unpack" them, for example, on a building platform 15 of a building container 16 in which the components 15 have been manufactured in the manner described above.
  • the building container 16 is arranged directly below a component insertion opening 1 of a cleaning device 100 according to the invention.
  • the components 14 are introduced via the component insertion opening 1 into the cleaning device 100, in particular sucked out of the building container 16.
  • the construction platform 15 can be raised, for example.
  • the cleaning device 100 can be raised or lowered relative to the building platform 15 or relative to the building container 16, in particular via a linear axis system such as a gantry.
  • the cleaning device 100 is then moved vertically downward in accordance with the level of components 14 currently present in the construction container 16, so that the component insertion opening 1 always lies on the level of the components 14 which is just at the top.
  • the unpacked components 14 After cleaning in the cleaning device 100, the unpacked components 14 pass through a component discharge opening 2 of the cleaning device 100, for example onto a conveying device 17 for further processing or storage.
  • a continuous arrow line on the component insertion opening 1 represents the introduction of components 14 with adhesive powder particles into the cleaning device 100 and the dotted arrow lines the execution of the unpacked, ie the adhering powder cleaned components 14.
  • the dashed arrow lines symbolize the execution of cleaned powder particles from the cleaning device 100 via powder discharge openings 3, 4.
  • the preferred embodiment of a cleaning device 100 according to the invention shown in FIGS. 2a to 2e includes a cell wheel 5 of a cell wheel lock 25 which rotates relative to a stationary housing 10 with a cylindrical wall 6.
  • the cellular wheel 5 has, for example, five cells 18 which extend radially outwardly through the wall 6 of the housing, upwards and downwards are limited by a top plate 19 and a bottom plate 20 of the housing 10 and in the circumferential direction in each case by cell blades 21, as shown in particular Fig.2e.
  • the cell wings 21 of the cellular wheel 5 slide close to the wall 6 of the housing 10.
  • the direction of rotation of the cellular wheel 5 is symbolized in the figures by a curved arrow.
  • the bucket 5 is driven by a motor, preferably by an electric motor, for example, continuously, i. driven at a constant speed relative to the stationary housing 10.
  • the motor 9 is controlled by an electronic control device, not shown here.
  • the bucket 5 could also be pneumatically driven, for example, by a suction or compressed air flow, which is present anyway and will be explained later.
  • the cleaning device 100 is shown in the position of use, that is to say that parts shown below are actually located at the bottom and parts shown above are actually placed at the top.
  • two screen disks or screen surfaces 7, 8, for example are arranged one behind the other, which subdivide the cells into a lower chamber 23 and an upper chamber 24, respectively.
  • the two screen discs 7, 8 are rotatably connected to the feeder 5 and have, for example, different Siebloch penmesser, with an upper sieve disc 7 for smaller powder particles permeable sieve holes and a lower sieve disc 8 larger powder particles permeable, but impermeable sieve holes for the components to be cleaned 14 ,
  • an upper sieve disc 7 for smaller powder particles permeable sieve holes and a lower sieve disc 8 larger powder particles permeable, but impermeable sieve holes for the components to be cleaned 14 Alternatively, only a single sieve disc 7 or 8 could be present, which generally has permeable sieve holes for powder particles but impermeable to the components 14 to be cleaned. Then there is only one chamber available.
  • a first powder discharge opening 3 and a second powder discharge opening 4 are each formed as a nozzle to which, for example, a not shown here Saug Kunststoff device is connected, which generates a suction air flow at the two powder discharge openings 3, 4.
  • Saug Kunststoff device which generates a suction air flow at the two powder discharge openings 3, 4.
  • the component-Einrawöffung 1 is arranged, through which at least one component 14 and preferably a plurality of components 14 with adhering, not connected by the building process powder particles are introduced into the housing 10 ( Figure 1).
  • the dimensions of the component insertion opening 1 depend on the dimension and number of components 14 to be introduced into the housing 10 and can be adapted as required.
  • the component insertion opening 1 is arranged approximately coaxially with the first powder discharge opening 3 in the top plate 19 of the housing 10. Instead of only one, a plurality of such component insertion openings 1 may be present.
  • the component insertion opening 1 and the first powder discharge opening 3 are arranged so that they can be in a first rotational position (A) of the bucket 5 simultaneously with a cell 18 in flow communication. Therefore, if a suction air stream is present in the first powder discharge opening 3, then this suction air flow is also due to the air-permeable screen disks 7, 8 at the component insertion opening 1 and ensures that components 14 with adhering powder from the construction container 16 are conveyed over the component Insertion opening 1 can be sucked into the lower chamber 23 of the cell 18 brought into connection with the component insertion opening 1 and the first powder discharge opening 3 by rotation of the cell wheel 5.
  • the largest part of the adhering powder is already cleaned from the components 14 and can because of the relatively large Siebduckmessers the lower sieve plate 8 therethrough and into the upper chamber 24 of the respective cell 18th enter. Larger particles or contaminants of the cleaned-off powder are then held in the upper chamber 24 because of the smaller screen hole diameter of the upper screen disk 7, while smaller and reusable particles can pass through them to continue being driven by the suction air stream by means of the first powder discharge opening 3 in one To reach collection container not shown.
  • This air flow source is designed or designed such that the air flow generated by it is able to apply flow forces which spend at least one component 154 through the component insertion opening 1 in a cell 18, push against a sieve surface or sieve disk 8 delimiting the cell 18 and at least can clean a part of the adhering powder.
  • several components 14 are preferably sucked into the cell until, for example, the lower chamber 23 of a cell 18 is filled with components 14.
  • the powder Due to the serial arrangement of a plurality of screen disks 7, 8 with decreasing screen hole diameter along the suction air flow, the powder is simultaneously prepared for reuse by contaminants in the powder or powder agglomerations are deposited here on the upper screen disk 7.
  • the now pre-cleaned components 14 receiving cell 18 gets out of communication with the component insertion opening 1 and the first powder discharge opening 3, whereby the prevailing suction air flow is first canceled.
  • this cell 18 then immediately becomes connected or in the region of a second one Powder discharge opening 4, in which also a suction air flow is present.
  • the recorded in the cell 18 components 14 are thereby entrained by the two cells 18 in the circumferential direction delimiting cell wings 21 during rotation of the bucket 5 and thereby perform only a relative movement relative to the bottom plate 20 of the housing 10, while the screen plate 8 with the Rotates cellular wheel 5.
  • the pending on the two powder discharge openings 3, 4 suction air stream preferably originates from the same suction air device.
  • a third rotational position (C) in which the now completely cleaned components 14 receiving cell 18 is located above the component discharge opening 2 in the bottom plate 20 of the housing 10, the components 14 are due to their gravity and / or with the help of a voltage applied to the component discharge opening 2 Saugluftstroms from the cell 18 and the housing 10 on the conveyor 17 shown in FIG.
  • the lower sieve disk 8 is dispensed with so that only one chamber is present, in which the sucked-in components 14 are then attached to the upper sieve disk 7 with sieve holes having a smaller sieve hole diameter dam, which is only powder but not throughout the entire structure.
  • all (smaller and larger) powder particles then pass through the sieve disk 7 into the powder discharge opening 3 and from there into the collecting container.
  • the suction and cleaning of the components 14 takes place as before in the first rotational position (A) and in a single cell 18.
  • Compared to the embodiment of Figure 2 is dispensed with a further suction of powder through a second powder discharge opening 4.
  • the removal of the cleaned components 14 in turn takes place in a further, downstream Rotational position (C) by means of the component discharge opening 2 analogous to the embodiment of Figure 2.
  • FIGS. 3a to 3e Another embodiment of a cleaning device 100 is shown in FIGS. 3a to 3e.
  • the cleaned components 14 are sucked radially out of the chambers 23, 24 of the cells 18 to the outside.
  • the screen hole diameter of the screen holes of the lower screen disk 8 is permeable to smaller adhering powder components 14, while the upper screen disk 7 has screen holes having a screen hole diameter which generally prevents passing of components 14 but passes powder particles into the powder discharge ports 3, 4 leaves.
  • the process steps are suction of the components 14, cleaning of the components 14 and suction of cleaned powder in the first rotational position (A), further cleaning of the components 14 and suction of cleaned powder in the second rotational position (B) and discharge of the cleaned components 14 in the third rotational position (C) as described above.
  • FIGS. 4a to 4e An embodiment for greater throughput is shown in FIGS. 4a to 4e.
  • the screen surfaces 7, 8 are formed as cylinder jacket surfaces, wherein an inner screen surface 8, an inner chamber 23 with a circular cross-section bounded radially outward.
  • This inner chamber 23 of a cell 18 is in the third rotational position (C) of the bucket 5 with a arranged in the bottom plate 20 of the housing 10 component-discharge opening 1 1 in connection.
  • annular chamber 24 is formed with an annular cross section, which in the rotational position (C) with a further component Outlet opening 12 in connection device.
  • the inner chamber 23 is in communication with the component insertion opening 1 arranged in the base plate 20 and with the first powder discharge opening 3, as can be seen in particular from FIG.
  • the components to be cleaned 14 are sucked through the component insertion opening 1 in the first rotational position (A) in a cell 18.
  • the screen hole diameter of the screen holes of the inner screen surface 8 is chosen so that smaller components 14 pass through the inner screen surface 8 and can get into the outer chamber 24 until they are held on the outer screen surface 7 with a smaller screen hole diameter of the screen holes and cleaned there.
  • larger components 14 hang on the inner screen surface 8 and are cleaned there.
  • These larger components 14 therefore initially remain in each case in an inner chamber 23 of a cell 18.
  • Driving is in each case the pending in the first powder discharge opening 3 and thus also in the inner chamber 23 as well as in the outer chamber 24 acting suction air stream.
  • the powder particles can pass through both screen surfaces 7, 8 and, due to the suction air flow acting in the first rotational position (A), reach the collecting container via the first powder discharge opening 3.
  • the second rotational position (B) in turn, powder particles are sucked into the collecting container via the second powder discharge opening 4.
  • the cleaned components 14 are discharged from the respective cell 18 via the component discharge openings 11, 12 arranged in the base plate 20 and on the radius with the respective chamber 23, 24, in particular by gravity.

Landscapes

  • Cleaning In General (AREA)

Abstract

L'invention concerne un dispositif de nettoyage (100) destiné à éliminer la poudre adhérant à des pièces (14) qui ont été fabriquées en poudre compactée selon le procédé de construction par couches. Le dispositif de nettoyage (100) comprend les éléments suivants : • a) un corps (10), • b) un sas à roue cellulaire (25) qui est disposé dans le corps (10) et qui comporte une roue cellulaire (5) pouvant tourner par rapport au corps (10), • c) au moins une surface de tamis (7, 8) qui peut tourner avec la roue cellulaire (5), qui délimite les cellules (18) du sas à roue cellulaire (25) et qui présente des ouvertures de tamisage, • d) des moyens (9) pour faire tourner la roue cellulaire (5) du sas à roue cellulaire (25) conjointement avec la surface de tamisage (7, 8) dans différentes positions de rotation par rapport au corps (10), dans lesquelles des cellules (18) de la roue cellulaire (5) peuvent être mises en communication, • d1) selon une position de rotation (A), à la fois avec une ouverture (1) d'introduction des pièces, réalisée dans le corps (10) sous la forme d'une ouverture de guidage des pièces, et avec une première ouverture (3) d'évacuation de poudre, réalisée dans le corps (10) sous la forme d'une ouverture de guidage de poudre, et • d2) selon une autre position de rotation (C), avec une autre ouverture (2) d'évacuation des pièces, réalisée dans le corps (10) sous la forme d'une ouverture de guidage des pièces, pour l'évacuation hors du corps (10) de la pièce (14) qui est débarrassée de la poudre adhérente et • e) des moyens pour produire au moins un courant d'air d'aspiration ou de pression sous l'effet duquel, dans la première position de rotation (A) de la roue cellulaire (5), au moins une pièce (14) à laquelle de la poudre adhère est introduite à travers l'ouverture (1) d'introduction de pièces dans une cellule (18) du sas à roue cellulaire (25) et au moins une partie de la poudre qui adhère à la pièce (14) est éliminée de la pièce (14) et peut être transportée à travers les ouvertures de tamisage de la surface de tamisage (7, 8) dans la première ouverture (3) d'évacuation de poudre.
EP13805741.9A 2012-12-12 2013-10-28 Dispositif de nettoyage pour éliminer la poudre qui adhère à des pièces ou modèles Withdrawn EP2931440A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210024266 DE102012024266A1 (de) 2012-12-12 2012-12-12 Reinigungsvorrichtung zum Entfernen von an Bauteilen oder Modellen anhaftendem Pulver
PCT/DE2013/000636 WO2014090207A1 (fr) 2012-12-12 2013-10-28 Dispositif de nettoyage pour éliminer la poudre qui adhère à des pièces ou modèles

Publications (1)

Publication Number Publication Date
EP2931440A1 true EP2931440A1 (fr) 2015-10-21

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Country Link
EP (1) EP2931440A1 (fr)
DE (1) DE102012024266A1 (fr)
WO (1) WO2014090207A1 (fr)

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