WO2024251319A1 - Ensemble et procédé de production d'une structure 3d dans une imprimante 3d - Google Patents

Ensemble et procédé de production d'une structure 3d dans une imprimante 3d Download PDF

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Publication number
WO2024251319A1
WO2024251319A1 PCT/DE2024/000042 DE2024000042W WO2024251319A1 WO 2024251319 A1 WO2024251319 A1 WO 2024251319A1 DE 2024000042 W DE2024000042 W DE 2024000042W WO 2024251319 A1 WO2024251319 A1 WO 2024251319A1
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WO
WIPO (PCT)
Prior art keywords
building material
movement
particulate building
working
speed
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/DE2024/000042
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German (de)
English (en)
Inventor
Frank Wedemeyer
Rudolf Wintgens
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.)
Laempe Moessner Sinto GmbH
Original Assignee
Laempe Moessner Sinto 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 Laempe Moessner Sinto GmbH filed Critical Laempe Moessner Sinto GmbH
Publication of WO2024251319A1 publication Critical patent/WO2024251319A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10—Formation of a green body
    • B22F10/14—Formation of a green body by jetting of binder onto a bed of metal powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/22—Driving means
    • B22F12/224—Driving means for motion along a direction within the plane of a layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/50—Means for feeding of material, e.g. heads
    • B22F12/52—Hoppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/60—Planarisation devices; Compression devices
    • B22F12/67—Blades
    • 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
    • B29C64/205—Means for applying layers
    • B29C64/214—Doctor blades
    • 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
    • B29C64/236—Driving means for motion in a direction within 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
    • 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
    • B29C64/307—Handling of material to be used in additive manufacturing
    • B29C64/321—Feeding
    • B29C64/329—Feeding using hoppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—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
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—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
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to an arrangement for producing a 3D structure in a 3D printer, which has working means that can be moved over a construction field, wherein the working means are a means for applying a particulate building material to the construction field, a means for smoothing the applied particulate building material and a means for selectively solidifying the particulate building material.
  • the invention also relates to a method for producing a 3D structure in a 3D printer, wherein particulate building material is applied layer by layer to a building field of the 3D printer and selectively solidified.
  • the structure is computer-controlled from one or more liquid or solid materials according to specified dimensions and shapes.
  • Specifications for the components or workpieces to be printed (3D structures) can be provided, for example, by so-called computer-aided design systems (CAD) in the form of 3D printing data.
  • CAD computer-aided design systems
  • a particulate building material which is also known as a molding material.
  • the materials used for such 3D printing processes are building materials or molding materials such as plastics, synthetic resins, ceramics, unsolidified sediments such as minerals or sands and metals.
  • Partial or full-surface application of particulate building material also referred to as particle material or powdered building material, to a so-called building field in order to form a layer of unconsolidated particulate material, whereby the partial or full-surface application of particulate building material can also include smoothing the particulate building material.
  • a particulate building material is generally understood to be an accumulation of individual particles of a substance or a mixture of substances, with each particle having a three-dimensional extension. Since these particles can predominantly be understood as round, oval or elongated particles, it is possible to specify an average diameter for such a particle, which is usually in the range between 0.01 mm and 0.4 mm. Such a particulate building material can have fluid properties.
  • Various methods for generating a 3D structure or for applying particulate building material to a construction field to generate a 3D structure are known from the state of the art.
  • the method for applying fluids relates in particular to particulate material which is applied to an area to be coated, wherein the fluid is applied to the area to be coated in front of a blade, seen in the forward movement direction of the blade, and then the blade is moved over the applied fluid.
  • the object is to provide a device, a method and a use of the device with which the most even distribution of fluid material can be achieved on an area to be coated.
  • the solution is to have the blade perform an oscillation in the manner of a rotary motion.
  • the oscillating rotary motion of the blade fluidizes the fluid applied to the area to be coated. This not only allows particle material that has a strong tendency to agglomerate to be applied as evenly and smoothly as possible, but it is also possible to influence the compression of the fluid through the oscillation.
  • the fluid is applied to the area to be coated in excess.
  • the constant movement of the blade which oscillates in the manner of a rotary movement, homogenizes the excess fluid, viewed in the forward direction of the blade, in front of the blade in a roller formed from fluid or particle material by the forward movement of the blade. This allows any cavities between individual particle clumps to be filled and larger clumps of particle material are broken up by the roller movement.
  • the coater described in DE 10 2018 003 336 A1 is moved horizontally across the construction field.
  • the coater described here as an example is a so-called fluidizer, in which the particulate building material exits through an outlet and is discharged to the surface of the construction field in order to form a new layer of particulate building material with a specified layer thickness.
  • a means for smoothing the layer of particulate building material such as a blade, is usually also used.
  • the coater has a funnel-shaped storage container for storing the particulate building material and an opening or outlet for applying the particulate building material, which is arranged in the lower area of the coater. Furthermore, outlet means are arranged in the lower area of the funnel-shaped storage container, which prevent particulate building material from accidentally getting out of the coater onto the construction site.
  • Applying a new layer of the particulate building material to the construction field is achieved by releasing the particulate building material in the area of the outlet means.
  • the coater is moved over the build area and during this movement a new layer of the particulate build material is applied to the build area.
  • the particulate building material thus applied is smoothed or smoothed and solidified by a means for smoothing the layer of the applied particulate building material, such as a blade, whereby an accumulation of the excess particulate building material forms in front of this means.
  • the height and shape of this accumulation Collection is determined by the amount of excess particulate building material applied by the coater.
  • a means for smoothing the layer of applied particulate building material such as a blade
  • the blade and the accumulation of excess particulate building material forming in front of this blade create forces that act on the substrate.
  • This substrate consists, for example, of several layers of the particulate building material that has already been applied, which has already been selectively solidified in partial areas that are intended to form the 3D structure to be created. The size or amount and direction of these forces acting on the substrate varies locally.
  • the amount of these forces depends, for example, on the inclination of the blade, on the height of the accumulation of particulate building material, which can vary at different points in the accumulation, on the speed of movement of the blade across the construction site and on the grain size and distribution of the particulate building material.
  • forces of different strengths act on the substrate, in particular on the areas of the 3D structure that have already been selectively solidified.
  • Such forces generally have a horizontal component and a vertical component.
  • the horizontal component referred to as force F H , acts parallel to the surface of the building site in an area of the last applied layer of particulate building material.
  • the force F H is caused by the horizontal movement of the smoothing means, such as a blade.
  • the vertical component referred to as force F v , acts perpendicular to the surface of the building site or perpendicular to the last applied layer. layer of the particulate building material.
  • the force Fv is caused by the weight of the particulate building material, in particular the particulate building material in the accumulation.
  • the forces F H and F v are superimposed and a resulting force FR is created.
  • This resulting force F R is directed at an angle to the surface of the building site or the perpendicular, which is determined by the proportions of the forces F H and Fv and can be different at different points in the accumulation, in particular along the longitudinal extent of the accumulation. Likewise, the amount of the resulting force FR can be different at different points.
  • resulting forces FR acting on the substrate at an angle to the surface of the applied particulate building material lead to shifts in the layers of the applied particulate building material and in the partially selectively solidified areas of the 3D structure to be created. This leads to inaccuracies in the dimensions of the 3D structure to be created. If such dimensions exceed a certain tolerance, the 3D structure created can no longer be used in some cases.
  • a tolerance in the production of a 3D structure can, for example, be in the range of less than ⁇ 0.5 mm, in particular ⁇ 0.3 mm.
  • Another problem can be caused by excessive frictional forces between the particles of the particulate building material itself or between the particles of the particulate building material and a blade of a smoothing agent, as this can lead to inadmissible localized heating, which can, for example, affect the physical properties of the particulate building material.
  • DE 10 2019 007 480 A1 Another prior art is known from DE 10 2019 007 480 A1, which relates to an arrangement and a method for producing a layer of a particulate building material in a 3D printer.
  • the task to be solved is to provide a solution that increases the quantity of material applied with consistent quality and reduces the forces acting on the construction area when applying, smoothing and compacting the particulate building material.
  • the arrangement comprises a first assembly with a means for applying the particulate building material to a building field and a second assembly, which is arranged spatially spaced from the first assembly in the arrangement, is provided with a means for smoothing the applied particulate building material.
  • the solution to the problem according to the method consists in that in a first process step the particulate building material is applied to a construction field and that in a second process step which follows the first process step and is independent of it, the applied particulate building material is smoothed.
  • This separation of the assemblies for application and smoothing into two separate assemblies means that the particulate building material applied to a construction field experiences a dwell time, at least when the working equipment is moving at a correspondingly low speed over the construction field, before it is smoothed and compacted.
  • This dwell time can lead to an improvement in the distribution and alignment of the particles of the particulate building material in the currently applied layer.
  • the fixed distance between the assemblies due to the design limits the maximum possible speed when moving the assemblies over the construction field, at least in the event that a minimum necessary dwell time is to be observed in order to reduce the resulting forces FR ZU that occur.
  • no adjustment can be made, for example, to different particulate materials, since these sometimes require different dwell times on the surface of the construction field between the application and smoothing process steps in order to comply with specified tolerances when producing the 3D structure in the 3D printer.
  • neither an interaction of the described assemblies with a printing unit nor an adjustment of a distance of the described assemblies from the printing unit for the purpose of reducing the resulting forces acting on the substrate is intended.
  • the object of the invention is to provide an arrangement and a method for producing a 3D structure in a 3D printer, whereby the forces acting on already applied layers of the particulate building material as well as partially already solidified areas of the particulate building material are reduced when applying a further layer of the particulate building material.
  • Arrangements for producing a 3D structure in a 3D printer usually have working means that can be moved over a construction field.
  • working means of the 3D printer are known as a means for applying a particulate building material to the construction field, such as a coater, and as a means for smoothing the applied particulate building material, also referred to as a blade.
  • a print head is arranged in a 3D printer, for example, as a means for selectively solidifying the particulate building material.
  • each working means has a separately controllable or adjustable drive, with which the working means is moved over the construction site in a first direction of movement or in a second direction of movement independently of other working means and at a speed that is at least temporarily constant or at least temporarily changing.
  • each work tool is equipped with a separate drive that moves the respective work tool independently of other work tools.
  • These drives are controllable or adjustable drives that are controlled, for example, by control signals from a central control system of the 3D printer.
  • each work tool can be moved separately in a first direction of movement or in a second direction of movement opposite to the first direction of movement horizontally over the surface of the construction site and at different speeds or accelerations.
  • the first direction of movement for example, represents a movement of the work equipment horizontally across the construction area from right to left
  • the second direction of movement describes a movement of the work equipment horizontally across the construction area from left to right, i.e. opposite to the first direction of movement, or vice versa.
  • the separate drives of the work equipment enable the work equipment to be moved across the construction site at a set distance from each other. It is also possible to set the distance between two work equipment, such as for example, a printing unit for applying a binding agent and a coater following the printing unit for applying the particulate building material, at least within a specified period of time or temporarily to allow it to become increasingly larger.
  • the printing unit is moved at a speed v1 and the dispenser at a speed v2 over the building field, with the speed v1 being greater than the speed v2.
  • the dwell time i.e. the time span between the start of the selective solidification of the particulate material by the binding agent applied to the particulate building material by the printing unit and a further particulate building material application to this solidifying area in a subsequent layer.
  • the selectively solidified areas harden, with these selectively solidified areas becoming increasingly mechanically stable over time.
  • the residence time is in a range between 0.05 s and 5.0 s. This means that the time span between the start of the selective solidification of the particulate building material by the binding agent applied to the particulate building material by the printing unit and a further application of the particulate building material to this solidifying area by the subsequent coater in a subsequent layer can be up to 5.0 s.
  • the lower the speed of a coater following the printing unit during movement over the build area the longer the residence time and thus the strength of the selectively solidified areas before the negative influence of the forces acting on the solidified areas (F H , F v and F R .), caused by the subsequent process of applying and smoothing the next layer of the particulate build material, can take effect.
  • the lower the speed of the coater and/or the means for smoothing and compacting the applied particulate building material the lower the forces that lead to displacements in the layers of the applied particulate building material and in the partially selectively solidified areas of the 3D structure to be created.
  • the layers or particles of the particulate building material are subjected to less stress or acceleration, the forces acting on the construction area when applying, smoothing and compacting the particulate building material are reduced. This reduces inaccuracies in the dimensions of the 3D structure to be created and improves the quality of the 3D structure to be created.
  • the invention provides that by arranging one drive each in the working means of the 3D printer, the speed of the working means when moving the working means over the construction area is controlled or regulated separately, i.e. independently of one another.
  • This design with its own drives also makes it possible for the assemblies to be moved or moved in relation to one another.
  • this relation means that a working means is moved relative to a second working means, whereby a speed of a second working means following a first working means is, for example, 1/4 or 1/3 or 1/2 of the speed of the first working means.
  • This relation also means a movement of the first and second working means, whereby the speeds of the working means tools are the same, regardless of whether both tools move across the construction site at 400 mm/s or 800 mm/s.
  • a first means for applying a particulate building material a first means for smoothing and compacting the particulate building material applied to the building field by the first means, a means for selectively solidifying the particulate building material and a second means for applying the particulate building material and a second means for smoothing and compacting the particulate building material applied to the building field by the second means are each provided with their own separately controllable or adjustable drive.
  • the application of a binding agent by a printing unit and the subsequent application of another layer of the particulate building material by means of the coater as well as the smoothing of the particulate building material applied by the coater by means of a blade is provided in the first direction of movement or in the second direction of movement.
  • the separately movable working equipment of the 3D printer is arranged, for example, in the sequence of printing unit, coater and blade. This arrangement variant enables the steps of applying a binding agent, applying another layer of the particulate building material and smoothing the applied particulate building material to take place when the working equipment moves over the construction field of the 3D printer, for example in the first direction of movement.
  • the working equipment must then be moved back, for example in the second direction of movement, in order to repeat the steps of applying, applying and smoothing in a subsequent layer and thus build up the 3D structure layer by layer.
  • the working equipment is moved back in this way, the production of the 3D structure cannot be continued.
  • the invention also provides for bidirectional operation of the 3D printer.
  • the steps of applying a binding agent, applying a further layer of the particulate building material and smoothing the applied particulate building material can be carried out in one pass in both the first direction of movement and the second direction of movement. It is no longer necessary to return the work equipment without continuing the process of producing the 3D structure.
  • a first means for applying a particulate building material, a first means for smoothing and compacting the particulate building material applied to the building field by the first means, and a means for selectively solidifying the particulate building material are arranged in the 3D printer above the building field.
  • a second means for applying the particulate building material and a second means for smoothing and compacting the particulate building material applied to the building field by the second means are arranged in the 3D printer above the building field.
  • the working means For the steps of applying, applying and smoothing in the first or second direction of movement, the working means are used: means for selectively solidifying the particulate building material, a first means for applying a particulate building material and a first means for smoothing and compacting the particulate building material applied to the construction field by the first means.
  • the working means For the subsequent steps of applying, applying and smoothing in the second or first direction of movement, the working means are used: means for selectively solidifying the particulate building material, a second means for applying the particulate building material and a second means for smoothing and compacting the particulate building material applied to the construction field by the second means.
  • the order of arrangement of the working equipment over the construction site is, for example, second means for smoothing and compacting, second means for applying the particulate building material, means for selectively solidifying the particulate building material, first means for applying a particulate building material and first means for smoothing and compacting or vice versa.
  • all work equipment has its own separately controllable or adjustable drive and can therefore be started independently of each other at different times and with different speeds. speeds and accelerations over the construction area in the first and second directions of movement.
  • the means for applying a particulate building material are coaters, the means for smoothing and compacting the applied particulate building material are blades and the means for selectively solidifying the particulate building material are a printing unit.
  • a particulate building material is applied by a coater whose quantity of the dispensed particulate building material is regulated or controlled.
  • a blade is used as a means for smoothing and compacting the applied particulate building material, which is arranged at an angle in the direction of an accumulation of particulate building material that forms in front of the blade in the direction of movement.
  • a pressure unit is used as a means for selectively solidifying the particulate building material, which has a plurality of nozzles, via which the binding agent is applied to the areas to be selectively solidified on the surface of the applied and smoothed or compacted particulate building material.
  • the separately controllable or adjustable drive in each work tool is an electric linear drive, an electromechanical linear drive, an electromagnetic drive, a ball or roller screw drive, a rack and pinion drive or a threaded spindle drive.
  • the work equipment according to the invention has its own, separately controllable or adjustable drive, which moves the respective work equipment independently of one or two adjacent work equipment over the construction field of the 3D printer.
  • all controllable or adjustable drives are suitable for this purpose, which make it possible to set the work equipment in a travel movement at a set time, whereby the drive moves the work equipment in a selectable direction, i.e. in the first direction of movement or in the second direction of movement, with a selectable acceleration and at a selectable speed over the construction field.
  • the drives mentioned are an electric linear drive, an electromechanical linear drive, an electromagnetic drive, a ball or roller screw drive, a rack and pinion drive or a threaded spindle drive.
  • particulate building material is applied layer by layer to a construction field of the 3D printer and selectively solidified.
  • separately movable working means are provided above the construction field, wherein the working means are at least one means for applying a particulate building material such as a coater, at least one means for smoothing the applied particulate building material such as a blade and a means for selectively solidifying the particulate building material such as a printing unit.
  • the working means are at least one means for applying a particulate building material such as a coater, at least one means for smoothing the applied particulate building material such as a blade and a means for selectively solidifying the particulate building material such as a printing unit.
  • two coaters, two blades and a printing unit are arranged above the construction field.
  • each work tool has its own drive and that the work tools can be controlled or regulated separately in such a way that they are moved independently of one another in a first direction of movement or in a second direction of movement over the construction site, wherein the work tools are moved at least temporarily at a constant, fixed distance from one another or at least temporarily at a changing distance from one another.
  • the coater is moved at a distance or a changing distance, in particular an increasing distance, in relation to the printing unit.
  • the time or period of time elapsing between the application of the binding agent by the printing unit and the subsequent application of the further layer of the particulate building material by the coater is also referred to in this description as the dwell time.
  • the subsequent coater is the first coater. If the printing unit is moved in the second direction of movement, the subsequent coater is the second coater. Furthermore, if the printing unit is moved in the first direction of movement, the subsequent working equipment is the first coater and the first blade. If the printing unit is moved in the second direction of movement, the subsequent working equipment is the second coater and the second blade.
  • the distance between the printing unit and the subsequent coater is designed to change and increase at least temporarily.
  • a sufficiently long dwell time is ensured in which at least partial hardening of the selectively solidified areas takes place.
  • These selectively solidified areas become increasingly stable over time and thus more resistant to the forces acting on these areas (FH, FV and FR.).
  • the distance between the printing unit and the subsequent coater has reached a size that ensures a sufficient dwell time, the distance then reached is maintained. This means that after reaching this distance, the printing unit and the subsequent coater will move at the same speed over the construction area with this achieved or specified distance from each other. It is further provided that the working means of the first coater and the first blade are moved in the first direction of movement or the working means of the second coater and the second blade are moved in the second direction of movement at a distance that is the same or increasing from the means for selectively solidifying the particulate material, i.e. the printing unit, i.e. at an equal or lower speed, over the construction field.
  • the working tools of the first coater and the first blade follow the printing unit at the same or a lower speed.
  • the working tools of the second coater and the second blade follow the printing unit at the same or a lower speed. This ensures the bidirectional operation of the 3D printer.
  • the movement of the working equipment first coater and first blade in the first direction of movement or the movement of the working equipment second coater and second blade in the second direction of movement begins with a time delay Delta t to the start of the movement of the printing unit.
  • the movement of the printing unit is started at a time t1 with a first speed v1, while the subsequent coater has a second speed v2 of zero, i.e. is not moved over the construction field.
  • the movement of the following working means, coater and blade starts at a time t2, which is then moved at a second speed v2 in the direction of the preceding printing unit. It is intended that the first speed v1 is selected to be equal to or greater than the second speed v2.
  • the movement of the first coater and the first blade in the first direction of movement is carried out together at time t2 is started and that these two subsequent working devices are each moved over the construction field at the second speed v2. It is also intended that the movement of the subsequent working devices, the second coater and the second blade, in the second direction of movement is started together at time t2 and that these two subsequent working devices are each moved over the construction field at the second speed v2.
  • the working means of the first coater and the first blade are moved in the first direction of movement or the working means of the second coater and the second blade are moved in the second direction of movement over the construction field for a first fixed period of time at a lower speed than the printing unit and subsequently for a second fixed period of time at a speed equal to the printing unit.
  • the following is intended to achieve a distance between the printing unit and the subsequent coater that ensures a required dwell time.
  • the working equipment printing unit, first coater and first blade are located together at a first end of the travel path formed above the construction field, for example on a right-hand side, and are subsequently moved above the construction field in the first direction of movement.
  • the movement of the working equipment in the first direction of movement is started at a time t1, wherein for a first fixed period of time the printing unit is moved at the first speed v1 and the first coater and the first blade are moved together at the second speed v2.
  • the first speed v1 is greater than the second speed v2.
  • the first speed v1 is 800 mm/s and the second speed v2400 mm/s.
  • a distance between the printing unit and a subsequent coater can be in a range between 100 mm and 2000 mm.
  • the printing unit can be moved at the first speed v1, the first coater at the second speed v2 and the first blade at a third speed v3 in the first direction of movement or in the second direction of movement.
  • the speeds can be controlled or regulated in such a way that v1 ⁇ v2 ⁇ v3 applies.
  • the invention provides that the distance between the printing unit and a coater following the printing unit corresponds to a length of the construction field, also referred to as the construction box.
  • the construction box a length of the construction field
  • the working means After expiry of this first fixed period of time, the working means are moved in the first direction of movement for a second fixed period of time such that the first speed v1 is equal to the second speed v2, whereby the distance between the printing unit and the first coater and the first blade no longer changes until the opposite second end of the travel path formed above the construction field is reached by the working means.
  • the above description of the movement of the working means in the first direction of movement is exemplary.
  • the embodiment according to the invention of the movement of the working means at different speeds at fixed periods of time is applicable both in the first direction of movement and in the second direction of movement.
  • the speed of the working means of the first coater and first blade in the first direction of movement or of the working means of the second coater and second blade in the second direction of movement in the event that the working means of the first coater and first blade or the working means of the second coater and second blade are moved at a changing distance from the printing unit, is in a range between 10% and 90%, in particular in a range between 30% and 80%, further in particular at 60% of the speed of the printing unit.
  • the working equipment, printing unit and coater with blade can be moved at a changing distance.
  • a changing distance is an increasing distance in order to achieve a dwell time in which at least improved curing of the selectively solidified areas can take place.
  • the first speed v1 of the printing unit is selected to be greater than the second speed v2 of the subsequent working equipment, coater and blade.
  • This speed difference is selected in such a way that the speed v2 of the subsequent working equipment, coater and blade, is in a range between 10% and 90% of the speed v1 of the printing unit, regardless of the direction of movement. It has proven advantageous for this speed difference to be in a range between 30% and 80%. In a special version, this speed difference is intended to be 60%.
  • the time delay Delta t between a start of the process of the subsequent working means first coater and first blade or second coater and second blade at a time t2 compared to a start of the process of the printing unit at a time t1 is in a range between 0.05 s and 3.0 s, in particular in a range between 0.2 s and 2.0 s, further in particular at a value of 1.0 s.
  • the subsequent work equipment, first coater and first blade or second coater and second blade are set in motion with a delay of Delta t relative to the printing unit, whereby this delay Delta t lies in a range between 0.05 s and 3.0 s. It has proven advantageous for this delay Delta t to lie in a range between 0.2 s and 2.0 s.
  • the delay Delta t has a value of 1.0 s. This means that the movement of the subsequent work equipment begins at time t2 1.0 s after the start of the movement of the printing unit at time t1.
  • a regulation of a quantity of the particulate building material discharged by the coater takes place as a function of the speed v2 of the coater over the construction field, wherein the regulation takes place by changing a gap width of the coater or by changing a speed of a roller of the coater, wherein the quantity of the particulate building material discharged increases with increasing speed v2 of the coater during the process over the construction field, wherein the gap width of the coater is controllable in a range between 1.0 mm and 4.0 mm, in particular in a range between 1.3 mm and 3.5 mm.
  • the particulate building material is applied to the construction field by the first coater in the first direction of movement or by the second coater in the second direction of movement during the movement of the respective coater at the speed v2.
  • Coaters are known from the prior art which have a funnel-shaped storage container for storing the particulate building material.
  • This funnel-shaped storage container is designed to extend lengthwise across the width of the building area, with its length being a multiple of its width.
  • the storage container has a gap-shaped opening or an outlet with a gap width, with an outlet means arranged at the gap-shaped opening.
  • the outlet means is controlled accordingly, whereby it is also provided to change the gap width in order to influence the amount of particulate building material dispensed by the coater.
  • the gap width of the coater is adjustable in a range between 1.0 mm and 4.0 mm, in particular in a range between 1.3 mm and 3.5 mm, and thus less or more particulate building material is dispensed by the coater and applied to the construction field.
  • the gap width is set to a value of 3.5 mm at a speed v2 of 800 mm/s and to a value of 1.8 mm at a speed v2 of 400 mm/s.
  • Fig. 1 an exemplary arrangement for producing a 3D structure in a 3D printer according to the prior art
  • Fig. 2 an exemplary distribution of forces acting on the subsoil when a smoothing agent is moved over a construction site
  • Fig. 3 a schematic diagram of the arrangement according to the invention for producing a 3D structure in a 3D printer in a first variant with its functionality in a first direction of movement
  • Fig. 4 a schematic representation of the arrangement according to the invention for producing a 3D structure in a 3D printer in the first variant with its functionality in a second direction of movement
  • Fig. 5 a schematic representation of the arrangement according to the invention for producing a 3D structure in a 3D printer in a second variant with its functionality only in the first direction of movement.
  • Figure 1 shows an exemplary arrangement 1 for producing a 3D structure in a 3D printer according to the prior art.
  • Such an arrangement 1 has, for example, three working means 3, 4, 5 that can be moved over a construction field 2.
  • These working means are a means 3 for selectively solidifying a particulate construction material 6 such as a printing unit 3, a means 4 for applying of the particulate building material 6 such as a coater 4 and a means 5 for smoothing and compacting the applied particulate building material 6 such as a blade 5.
  • the working means 3, 4, 5 can be replaced by other means having the same effect without affecting the essence of the present invention.
  • the printing unit 3 is shown with a few drops, which represent a targeted release of fine drops of a binding agent released by the printing unit 3.
  • the binding agent ejected via nozzles of the printing unit 3 is applied to a layer of the particulate building material 6 located under the printing unit 3 and serves to selectively solidify the defined areas of the particulate building material 6, which form the 3D structure to be created.
  • Figure 1 shows the coater 4 in a snapshot in which particulate building material 6 exits from a storage container 9 through an outlet 8 and reaches the surface of the construction field 2 as discharge 10 in order to form a new layer of particulate building material 6 with a fixed layer thickness 11.
  • a means 5 for smoothing the layer of particulate building material 6 applied by the coater 4 is usually used, such as a blade, which in addition to a smoothing function also takes on a compaction of the particulate building material 6.
  • the coater 4 shown as an example in Figure 1 has the funnel-shaped storage container 9 for storing the particulate building material 6.
  • This funnel-shaped storage container 9 is designed to extend lengthwise over a width of the building field 2, with its length being a multiple of its width.
  • the storage container 9 has a gap-shaped opening or the outlet 8. At the outlet 8 is an outlet means not shown in Figure 1 which prevents particulate building material 6 from accidentally reaching the construction site 2.
  • the particulate building material 6 is applied to the construction field 2 by controlling the outlet means in such a way that the particulate building material 6 is released in the area of the outlet 8, whereby the particulate building material 6 is discharged from the coater 4 via the gap-shaped opening or the outlet 8. This discharged particulate building material 6 forms the discharge 10, which reaches the surface of the construction field 2.
  • the coater 4 is moved over the construction field 2 in the first direction of movement 7 shown by an arrow and a new layer of the particulate building material 6 is applied to the construction field 2.
  • This particulate building material 2 applied to the construction area 2 is then smoothed or smoothed and solidified by the blade 5.
  • the blade 5 is also moved in the first direction of movement 7 shown by the arrow over the construction area 2 and thus follows the coater 4. Since the coater 4 and the blade 5 are arranged in a common higher-level unit according to the state of the art, with which the working equipment 4 and 5 are moved together over the construction area 2, the working equipment 4 and 5 move at the same speed and at a structurally predetermined distance from one another over the construction area 2.
  • the outlet means is controlled accordingly, as a result of which, for example, more particulate building material 6 can exit through the outlet 10 and the amount of particulate building material 6 applied to the construction field 2 increases.
  • the amount of particulate building material 6 applied to the construction field 2 can be controlled by changing a gap width of the gap-shaped opening at the outlet 8. Since, for safety reasons, more particulate building material 6 is applied to the surface of the construction field 2 than is required to form the layer of particulate building material 6 with the layer thickness 11, an accumulation 12 forms in front of the blade 5.
  • Figure 1 shows a representation of a side view of the accumulation 12 of the particulate building material 2 on the construction field 3 in front of the blade 5, wherein the accumulation 12 has a depth T 13, a width B and a height H 14.
  • the width B of the accumulation 12, not shown in Figure 1 extends, so to speak, into a depth of the representation in Figure 1.
  • Figure 2 shows an exemplary distribution of forces which act on the subsoil when the smoothing means 5, such as the blade 5, moves over the construction area 2.
  • the blade 5 is shown, which is moved horizontally over the surface of the construction area 2 in the first direction of movement 7 shown by the arrow.
  • the accumulation 12 forms in front of the blade 5 due to the excess particulate construction material 6 being applied.
  • the alignment of the blade 5 can deviate from a vertical line, as shown by way of example in Figure 2. Due to the movement of the blade 5 in the first direction of movement 7 and the weight of the discharged particulate building material 2 located in the accumulation 12, forces are generated.
  • Such forces generally have a horizontal component and a vertical component.
  • the horizontal component which is referred to as force F H , acts parallel to the surface of the building field 2, in particular in an area of the last applied layer of the particulate building material 6.
  • the force F H is caused by a horizontal movement of the blade 5 during smoothing.
  • the vertical component which is referred to as force F v , acts perpendicular to the surface of the construction field 2 or perpendicular to the last applied layer of the particulate building material 2.
  • the force F v is caused by a weight of the particulate building material 2, in particular of the particulate building material 6 located in the accumulation 12.
  • the forces F H and Fv are superimposed and a resulting force FR is created.
  • This resulting force F R is directed at an angle between 0° and 90° to the surface of the construction field 2 or a perpendicular not shown in Figure 2.
  • the direction of the force F R is determined by the proportions of the forces F H and F v and is different at different points in the accumulation 12, in particular along the width of the accumulation 12. Likewise, the amount of the resulting force FR can be different at different points.
  • excessively high forces can influence the density of sub-areas of one or more underlying layers.
  • it can also influence already solidified areas that form the 3D structure. Such an influence leads, for example, to deviations in the dimensional accuracy of the 3D structure to be created by compressing or shifting such an already solidified area.
  • the amount or volume or dimensions of the accumulation 12 are usually controlled or regulated.
  • practice shows that the success of such controls or regulations of the amount or volume or dimensions of the accumulation 12 only inadequately reduces the influences on the creation of the 3D structure. This is particularly due to the fact that the resulting force FR can act on areas in which the binding agent was selectively applied but which has not yet been able to harden.
  • Figure 3 shows a schematic diagram of the arrangement 1 according to the invention for producing the 3D structure in the 3D printer in a first variant with its functionality in the first direction of movement 7.
  • the printing unit 3 a first coater 4a and a first blade 5a are shown as the working equipment of the 3D printer.
  • the first coater 4a and the first blade 5a are located to the right of the printing unit 3 in the illustration in Figure 3.
  • a second coater 4b and a second blade 5b are shown as working tools of the 3D printer to the left of the printing unit 3.
  • the functions or modes of operation of the working tools 3, 4a, 4b, 5a, 5b are identical to the working tools 3, 4, 5 described above and are therefore no longer explained in detail.
  • the arrangement of two coaters 4a and 4b and two blades 5a and 5b enables both the production of the 3D structure in the first direction of movement 7, as explained below for Figure 3, and the production of the 3D structure in a second direction of movement 16, as explained later for Figure 4.
  • the production of the 3D structure in the first direction of movement 7 and in the second direction of movement 16 opposite to the first direction of movement 7 is also referred to as bidirectional operation when producing the 3D structure.
  • the binder can be used to selectively solidify and apply, smooth and solidify particulate building material 6.
  • the bidirectional operation improves the effectiveness and printing speed when producing the 3D structure in the 3D printer.
  • all working means 3, 4a, 4b, 5a, 5b each have their own drive 17.
  • These drives 17 enable the working means 4a, 4b, 5a, 5b to be moved independently of one another in the first direction of movement 7 or in the second direction of movement 16 and with different accelerations and speeds horizontally above the construction area 2.
  • the drives 17 are controlled accordingly by a central control of the 3D printer.
  • the selective solidification, application, smoothing and compaction takes place in the first direction of movement 7 from right to left.
  • the working means 3, 4a and 5a are actively involved, while the working means 4b and 5b remain passive and make no contribution to the creation of the 3D structure.
  • the working means 4b and 5b are moved, for example, at a speed v1 in the first direction of movement 7, at which the printing unit 3 is also moved in the first direction of movement 7.
  • the working means 4b and 5b can be moved at a speed greater than v1.
  • the printing unit 3 is moved in the first direction of movement 7 at the speed v1 and applies binding agent to the surface of a current layer 18 for selectively solidifying predetermined areas, wherein these selectively solidified areas are intended for forming the 3D structure to be produced.
  • the first coater 4a and the first blade 5a are also subsequently moved in the first direction of movement 7 of the printing unit 3.
  • the working means 4a and 5a are moved, for example, horizontally over the construction field 2 from right to left at a speed v2.
  • the coater 4a applies a further layer of the particulate building material 6 via its outlet 8 and the blade 5a smoothes and compacts this particulate building material 6 applied by the coater 4a, thereby creating a subsequent layer 19.
  • the invention provides that the working means 3 and 4a and 5a are moved at different speeds.
  • the speed v1 is selected to be at least temporarily greater than the speed v2, so that a distance 20 is created between the working means 3 and 4a and 5a.
  • the velocities v1 and v2 are shown in Figure 3 by means of further arrows, where the arrow illustrates the direction of the velocity and the length of the arrow illustrates a value for the velocity v1 and v2.
  • This residence time is a period of time between the beginning of the selective solidification of the particulate building material 6 by the binding agent applied to the particulate building material 6 by the printing unit 3 and a further application of the particulate building material 6 to this solidifying area in the subsequent layer 19. If this residence time, which is increased with the distance 20 corresponds, chosen accordingly large, the particulate building material 6 hardens better in the selectively solidified areas and becomes more resistant to the subsequently acting forces F H , Fv and FR.
  • the first speed v1 of the printing unit 3 is greater than the second speed v2 of the working means 4a and 5a for at least a fixed period of time until the predetermined distance 20 is reached. If this predetermined distance 20 is reached and thus a desired dwell time, the working means 4a and 5a are moved at a speed greater than v2, for example also at the first speed v1, until all active working means 3, 4a, 5a have reached the end of the construction field 2.
  • An alternative to achieving the predetermined distance 20 and thus the desired dwell time is to start the movement of the printing unit 3 over the construction area 2 in the first direction of movement 7 at the first speed v1 at a time t1, while the working means 4a and 5a are not yet moving or are standing still. In this way, the distance 20 between the printing unit 3 and the assemblies 4a and 5a increases.
  • the movement of the working means 4a and 5a in the first direction of movement 7 starts preferably at the first speed v1.
  • the working means 3, 4a and 5a are now each moved at the first speed v1, whereby the distance 20 between the printing unit 3 and the working means 4a and 5a remains the same. This process also ends when the end of the construction field 2 is reached.
  • Figure 4 shows a schematic diagram of the arrangement 1 according to the invention for producing the 3D structure in the 3D printer in the first variant with its functionality in the second direction of movement 16.
  • the printing unit 3 Above the construction area 2, the printing unit 3, the first coater 4a, the second coater 4b, the first blade 5a and the second blade 5b are shown as working tools of the 3D printer.
  • the arrangement of two coaters 4a and 4b as well as two blades 5a and 5b enables, as already explained, both the production of the 3D structure in the first direction of movement 7 and the production of the 3D structure in the second direction of movement 16, as explained here for Figure 4.
  • the production of the 3D structure is also provided in the example of Figure 4 in bidirectional operation, whereby with each pass of the working means 3, 4a, 4b, 5a, 5b, the material is selectively solidified by means of the binding agent and particulate building material 6 is applied, smoothed and solidified.
  • all working means 3, 4a, 4b, 5a, 5b each have their own drive 17, so that the working means 3, 4a, 4b, 5a, 5b can be moved independently of one another in the first direction of movement 7 or in the second direction of movement 16 and with different accelerations and speeds horizontally above the construction field 2.
  • the selective solidification, application, smoothing and compaction takes place in the second direction of movement 16 from left to right.
  • the working means 3, 4b and 5b are actively involved, while the working means 4a and 5a remain passive and make no contribution to the creation of the 3D structure.
  • the working means 4a and 5a are moved, for example, at the speed v1 in the second direction of movement 16, at which the printing unit 3 is also moved in the second direction of movement 16.
  • the working means 4a and 5a can be moved at a speed greater than v1.
  • the printing unit 3 is moved in the second direction of movement 16 at the speed v1 and applies binding agent to the surface of the current layer 18 for selectively solidifying predetermined areas, wherein these selectively solidified areas are intended for forming the 3D structure to be produced.
  • the second coater 4b and the second blade 5b are also moved in the second movement direction 16 following the printing unit 3.
  • the working means 4b and 5b are, for example, move horizontally over construction area 2 from left to right with speed v2.
  • the coater 4b applies a further layer of the particulate building material 6 and the blade 5b smoothes and compacts this particulate building material 6 applied by the coater 4b, whereby the subsequent layer 19 is formed.
  • the speed v1 is selected to be at least temporarily greater than the speed v2, so that the distance 20 is created between the working means 3 and 4b and 5b.
  • the velocities v1 and v2 are also shown in Figure 4 by means of further arrows, where the arrow illustrates the direction of the velocity and the length of the arrow illustrates a value for the velocity v1 and v2.
  • the first speed v1 of the printing unit 3 is greater than the second speed v2 of the working means 4b and 5b at least for a fixed period of time until the predetermined distance 20 is reached. Once this predetermined distance 20 is reached and thus the desired dwell time, the working means 4b and 5b are moved at a speed greater than v2, for example also at the first speed v1, until all active working means 3, 4b, 5b have reached the end of the construction field 2.
  • An alternative to achieving the specified distance 20 and thus the desired dwell time in this example is that at a time t1 the movement of the printing unit 3 over the construction area 2 is started in the first direction of movement 7 at the first speed v1, while the working means 4b and 5b are not yet moving or are standing still. In this way the distance 20 between the printing unit 3 and the assemblies 4b and 5b increases.
  • the movement of the working means 4b and 5b in the second direction of movement 16 preferably starts at the first speed v1 .
  • the working means 3, 4b and 5b are each moved at the first speed speed v1, whereby the distance 20 between the printing unit 3 and the working means 4b and 5b remains the same. This process also ends when the end of the construction area 2 is reached.
  • Figure 5 shows a schematic diagram of the arrangement 1 according to the invention for producing the 3D structure in the 3D printer in a second variant with its functionality only in the first direction of movement 7.
  • the working equipment 3, 4a, 5a in the example in Figure 5 has reached the left edge of the construction field 3 after moving in the first direction of movement 7, the working equipment 3, 4a, 5a are moved back to the right edge of the construction field 2 in the second direction of movement 16.
  • the processes of selective solidification, application, smoothing and compaction do not take place.
  • the production of the 3D structure can be continued by moving the working equipment 3, 4a, 5a again in the first direction of movement 7 with selective solidification, application, smoothing and compaction.
  • the return movement of the working means 3, 4a, 5a in the second direction of movement 16 can take place at the first speed v1 or at a speed which is greater than the first speed v1.

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

Abstract

L'invention se rapporte à un ensemble et un procédé de production d'une structure 3D dans une imprimante 3D, dans le but de réduire les forces qui agissent sur des couches déjà appliquées du matériau de construction particulaire et des régions déjà partiellement durcies du matériau de construction particulaire lorsqu'une couche supplémentaire du matériau de construction particulaire est appliquée. Cet objectif est atteint par un ensemble qui est caractérisé en ce que chaque outil (3, 4a, 4b, 5a, 5b) a un entraînement (17) qui peut être commandé ou réglé séparément et qui déplace l'outil sur la zone de construction (2) dans une première direction de déplacement (7) ou dans une seconde direction de déplacement (16) indépendamment d'autres outils et à une vitesse au moins temporairement constante ou au moins temporairement changeante.
PCT/DE2024/000042 2023-06-08 2024-05-29 Ensemble et procédé de production d'une structure 3d dans une imprimante 3d Ceased WO2024251319A1 (fr)

Applications Claiming Priority (2)

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DE102023115093.6 2023-06-08

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117875C1 (de) 2001-04-10 2003-01-30 Generis Gmbh Verfahren, Vorrichtung zum Auftragen von Fluiden sowie Verwendung einer solchen Vorrichtung
US20190168443A1 (en) * 2016-08-05 2019-06-06 Progress Maschinen & Automation Ag Device for producing at least one three-dimensional laminate for the construction industry
DE102018003336A1 (de) 2018-04-25 2019-10-31 Laempe Mössner Sinto Gmbh Anordnung und Verfahren zum Auftragen von partikelförmigem Baumaterial in einem 3D-Drucker
DE102019007480A1 (de) 2019-10-26 2021-04-29 Laempe Mössner Sinto Gmbh Anordnung und Verfahren zum Erzeugen einer Schicht eines partikelförmigen Baumaterials in einem 3D-Drucker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117875C1 (de) 2001-04-10 2003-01-30 Generis Gmbh Verfahren, Vorrichtung zum Auftragen von Fluiden sowie Verwendung einer solchen Vorrichtung
US20190168443A1 (en) * 2016-08-05 2019-06-06 Progress Maschinen & Automation Ag Device for producing at least one three-dimensional laminate for the construction industry
DE102018003336A1 (de) 2018-04-25 2019-10-31 Laempe Mössner Sinto Gmbh Anordnung und Verfahren zum Auftragen von partikelförmigem Baumaterial in einem 3D-Drucker
DE102019007480A1 (de) 2019-10-26 2021-04-29 Laempe Mössner Sinto Gmbh Anordnung und Verfahren zum Erzeugen einer Schicht eines partikelförmigen Baumaterials in einem 3D-Drucker

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