WO2010063691A2 - Realisation d'article par fusion selective de couches de poudre de polymere - Google Patents
Realisation d'article par fusion selective de couches de poudre de polymere Download PDFInfo
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- WO2010063691A2 WO2010063691A2 PCT/EP2009/066103 EP2009066103W WO2010063691A2 WO 2010063691 A2 WO2010063691 A2 WO 2010063691A2 EP 2009066103 W EP2009066103 W EP 2009066103W WO 2010063691 A2 WO2010063691 A2 WO 2010063691A2
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- WIPO (PCT)
- Prior art keywords
- thermoplastic polymer
- powder
- particles
- polyamide
- mixture
- 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.)
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Classifications
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- 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
- B29C64/314—Preparation
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- 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
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/02—Moulding by agglomerating
- B29C67/04—Sintering
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- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249981—Plural void-containing components
Definitions
- the present invention relates to a method for manufacturing articles by selective melting of polymer powder layers, in particular by rapid prototyping by solid-phase sintering using a laser, a powder based on thermoplastic polymers, exhibiting particular grain size and distribution characteristics.
- the invention also relates to articles obtained by such a method.
- Sintering is a process which makes it possible to obtain parts of complex shapes without tools and without machining, starting from a three-dimensional image of the article to be produced, by sintering superimposed layers of polymeric powders, in particular at the same time. using a laser.
- Thermoplastic polymers are generally used for this purpose.
- Generalities on rapid prototyping by laser sintering are mentioned in US6136948 and WO96 / 06881, US20040138363.
- the Applicant has discovered, quite surprisingly, the use of powders based on thermoplastic polymers having particular characteristics with regard to the particle size distribution, the Sphericity and intraparticle porosity allows the realization of articles by selective melting of polymer powder layers, especially by rapid prototyping using a laser, having high density and high uniformity of mechanical properties. In addition, these articles have a good surface appearance.
- the use of these particular powders even allows the production of articles by sintering of polyamide material not used to date, especially polyamide 6 or 66.
- the first subject of the present invention is therefore a process for manufacturing shaped articles by selective melting of layers of a powder based on thermoplastic polymers having the following characteristics: a particle size distribution d50 of between 20 and 100 ⁇ m, preferably between 30 and 70 ⁇ m, and also corresponding to the following relationship: (d90-d10) / d50 of between 0.85-1, 2, preferably 0.9-1.2; a sphericity factor of between 0.8 and 1, preferably between 0.85 and 1; an intra-particle porosity of less than 0.05 ml / g, preferably less than 0.02 ml / g.
- the invention also relates to a shaped article obtainable by the method mentioned above.
- binder means an assembly of polymer particles obtained according to the process indicated above.
- the particle size distribution of the objects is obtained by laser diffraction measurement on a granulometer from Malvern, using the wet modulus.
- the quantities used in this document are for d10, d50 and d90.
- the d10 mesh is the dimension such that 10% of the particles are smaller than this dimension and 90% of the particles are larger than this dimension.
- the d50 mesh is the dimension such that 50% of the particles are smaller than this dimension and 50% of the particles are larger than this dimension.
- the d90 mesh is the dimension such that 90% of the particles are smaller than this dimension and 10% of the particles are larger than this dimension.
- the coefficient of variation quantifying the extent of the distribution will be defined as: c r _ (d90 - d10) d50
- the laser diffraction particle size analysis is carried out according to the indications of the standard AFNOR ISO 13320-1.
- the sphericity factor is measured as follows: To quantify the sphericity of the objects, the following procedure is performed by image analysis. On at least 100 objects, we measure the characteristic lengths of small and large diameters for each object. For each object, the sphericity factor is defined as the ratio of the small diameter to the large diameter. For a perfect sphere, the ratio is 1. For grains of variable morphology, this ratio is less than 1 and tends towards 1 when one approaches the perfect sphericity. From 100 objects taken, the sphericity factor is calculated according to the ratio of the diameters, then the average of the sphericity factors is made. To do this, in a manner known per se, the sample of the particles is dispersed on a glass plate placed under an optical microscope and the characteristic lengths are recorded one after the other.
- the particles are in essentially spherical form.
- the intra-particle porosity is measured as follows:
- the porous texture of the objects is determined by mercury porosimetry using an Autopore IV device from Micromeritics. It is a method based on the intrusion of mercury into the porous intergranular and intragranular network. This intrusion is managed via a rise in pressure.
- the pressure range (P) used is 0.003 MPa to 400 MPa.
- the diameter of the pores (2r) is easily connected to the applied pressure:
- the parameters taken into account for mercury are respectively: 485.10 -5 N / cm for the surface tension ⁇ L v and 130 ° for the value of the angle of anchorage ⁇ .
- the results are presented in volume of mercury introduced per gram of sample as a function of the pressure, and therefore of the pore diameter, applied.
- Intra-particle porosity corresponds to the intrusion of mercury into pores less than 0.1 ⁇ m in size of a particle.
- Mercury porosimetry is a technical concept that is well known to those skilled in the art; for more details, reference may be made in particular to the article: Gomez F., Denoyel R., Rouquerol J., Langmuir, 16, 3474 (2000).
- the powder according to the invention has an intra-particle porosity of less than 0.05 ml / g, for pore sizes of between 0.01 ⁇ m and 1 ⁇ m.
- the flowability of the powders is measured by shearing a sample per annular cell (sold by D. Schulze, Germany).
- the pre-shearing of the powders is carried out on a cell with an area of 81 cm 2 with a normal stress equivalent to a mass of 4.3 kg.
- the shear points for plotting the flow of the sample are obtained for 4 stresses lower than the pre-shear stress, typically for mass equivalent stresses at 0.4-0.7-1, 7-2. , 5 kg.
- the density typed is measured as follows: the powder is poured into a measuring cylinder of 250 ml glass, previously tared. The top of the specimen is leveled. The weighed specimen is placed on the volumenometer and the level of the powder bed is read on the scale of the test piece after 2048 counts.
- the density typed is obtained with the following equation:
- the test is consistent with that reported in the European Pharmacopeia, 1997.
- the powder according to the invention can be obtained in various ways known to those skilled in the art depending on the materials used. For example, documents EP1797141 and WO2007 / 115977 may be cited.
- Said powder may especially be manufactured by: a) melt blending a thermoplastic polymer with a compound A consisting of a polymeric material comprising at least a part of its structure compatible with said thermoplastic polymer and at least part of its non-compatible structure and insoluble in said thermoplastic polymer, to obtain a dispersion of discrete particles of thermoplastic polymer; b) cooling said mixture to a temperature below the softening temperature of the thermoplastic polymer; c) treating said cooled mixture to cause disintegration of the thermoplastic polymer particles.
- the formation of the mixture is in particular obtained by melting the thermoplastic polymer and adding the compound A in solid or molten form and applying a mixing energy to obtain the formation of discrete particles of thermoplastic polymer dispersed in an advantageously continuous phase formed by the compound A.
- This mixture can also be obtained by solid-state mixing of particles of said thermoplastic polymer and particles of said additive A, and melting of the mixture of particles with application to the molten mixture of a mixing energy to obtain the formation of discrete particles of thermoplastic polymer dispersed in an advantageously continuous phase formed by the compound A.
- the concentration by weight of additive A in the mixture may be between 10% and 50%, advantageously between 20% and 30%.
- the mixture can be obtained by any suitable device such as screw mixers or agitators compatible with the temperature and pressure conditions used for the implementation of thermoplastic materials.
- the molten mixture is shaped before the cooling step, for example in the form of filaments or rods. This shaping can be advantageously carried out by an extrusion process through a die.
- this molten mixture is preferably produced in an extruder feeding the extrusion die.
- Cooling of the molten mixture can be achieved by any suitable means. Of these, air cooling or dipping in a liquid is preferred.
- the recovery step of the thermoplastic polymer powder advantageously consists in a disintegration treatment of the discrete particles of thermoplastic polymer.
- This disintegration can be obtained by applying a shearing force on the cooled mixture.
- the disintegration of the thermoplastic polymer particles can also be obtained by dipping the cooled melt in a liquid, non-solvent of the thermoplastic polymer and advantageously solvent of the additive A.
- Thermoplastic polymers that may be mentioned include polyolefins, especially polyethylene and polypropylene, polyvinyl chlorides, polyethylene terephthalate, polystyrenes, polyamides and acrylics. Particularly preferred are semi-crystalline thermoplastic polymers.
- Polyamide is particularly preferred.
- the polyamide is generally a polyamide of the type obtained by polycondensation from dicarboxylic acids and diamines, or of the type obtained by polycondensation of lactams and / or amino acids.
- the polyamide of the invention may be a mixture of polyamides of different types and / or of the same type, and / or copolymers obtained from different monomers corresponding to the same type and / or to different types of polyamide.
- the polyamide is chosen from polyamide 6, polyamide 6,6, their mixtures and copolymers.
- the polyamide may also be a polymer comprising such star macromolecular chains, such as those described in documents FR2743077, FR2779730, US5959069, EP632703, EP682057 and EP832149. These compounds are known to have improved fluidity compared to linear polyamides of the same molecular weight.
- the additive A is advantageously a polymer of the block, sequence, comb, hyperbranched or star type.
- the structure compatible with the polyamide forms a block, a sequence, the skeleton or the teeth of the comb, the heart or branches of the polymer star or hyperbranché.
- the compatible structure of the additive A comprises functions that are chemically identical to those of the polyamide.
- the additive A is chosen from the group consisting of a polymer D defined below or a hyperbranched polymer E preferably comprising at least one block of polyalkylene oxide.
- Said polymer D is a polymer with thermoplastic properties comprising a block of thermoplastic polymer and at least one block of polyalkylene oxide, such as:
- thermoplastic polymer block comprises a star or H macromolecular chain comprising at least one multifunctional core and at least one branch or segment of thermoplastic polymer connected to the core, the core comprising at least three identical reactive functions
- the polyalkylene oxide block or blocks are connected to at least a portion of the free ends of the star or H macromolecular chain chosen from the ends of the thermoplastic polymer branch or segment and the ends of the multifunctional core;
- thermoplastic polymers and their method of production are described in particular in WO 03/002668 incorporated by reference.
- the star macromolecular chain of the polymer D is advantageously a star polyamide obtained by copolymerization from a monomer mixture comprising: a) a multifunctional compound comprising at least three identical reactive functional groups chosen from the amino function and the carboxylic acid function b) monomers of the following general formulas (Ma) and / or (Mb):
- R 2 represent aliphatic, cycloaliphatic or aromatic hydrocarbon radicals, or arylaliphatic radicals, substituted or unsubstituted, identical or different, comprising from 2 to 20 carbon atoms, and which may comprise heteroatoms,
- Y is a primary amine function when X represents a carboxylic acid function, or Y is a carboxylic acid function when X represents a primary amine function,
- the macromolecular chain H of the thermoplastic polymer block of the polymer D is advantageously a polyamide H obtained by copolymerization from a monomer mixture comprising: a) a multifunctional compound comprising at least three identical reactive functions chosen from the amino function and the function carboxylic acid b) lactams and / or amino acids c) a difunctional compound chosen from dicarboxylic acids or diamines, d) a monofunctional compound whose function is either an amine function or a carboxylic acid function,
- the functions of c) and d) being aminated when the functions of a) are acidic, the functions of c) and d) being acidic when the functions of a) are amino, the ratio in equivalents between the functional groups of a) and the sum of the functional groups of c) and d) being between 1, 5 and 0.66, the ratio in equivalents between the functional groups of c) and the functional groups of d) being between 0.17 and 1.5; .
- the multifunctional compound of the star or H macromolecular chains is represented by formula (IV)
- Ri is a hydrocarbon radical comprising at least two linear or cyclic, aromatic or aliphatic carbon atoms and which can comprise heteroatoms
- A is a covalent bond or an aliphatic hydrocarbon radical comprising from 1 to 6 carbon atoms
- Z represents a primary amine radical or a carboxylic acid radical
- m is an integer between 3 and 8.
- the multifunctional compound is chosen from 2,2,6,6-tetra- ( ⁇ -carboxyethyl) -cyclohexanone, trimesic acid, 2,4,6-th- (aminocaproic acid) -1,3, 5-triazine, 4-aminoethyl-1,8-octanediamine.
- the POA alkylene oxide block of the polymer D is preferably linear. It can be chosen from polyethylene oxide blocks, polythmethylene oxide, polytetramethylene oxide blocks. In the case where the block is based on polyethylene oxide, it may comprise, at the ends, the block of propylene glycol units.
- the polyalkylene oxide block of the polymer D is preferably a block of polyethylene oxide.
- all the free ends of the macromolecular chain of the thermoplastic polymer block of the polymer D are connected to a block of polyalkylene oxide.
- hyperbranched polymer E is meant a branched polymeric structure obtained by polymerization in the presence of compounds having a functionality greater than 2, and whose structure is not perfectly controlled. These are often statistical copolymers.
- the hyperbranched polymers can for example be obtained by reaction between, in particular, multifunctional monomers, for example trifunctional and bifunctional monomers, each of the monomers carrying at least two different reactive functions of polymerization.
- the hyperbranched polymer E of the invention is chosen from polyesters, polyesteramides and hyperbranched polyamides.
- the hyperbranched polymer E of the invention is preferably a hyperbranched copolyamide of the type obtained by reaction between: at least one monomer of formula (I) below:
- R 1 is a substituted or unsubstituted hydrocarbon radical of the silicone, linear or branched alkyl, aromatic, alkylaryl, arylalkyl or cycloaliphatic type which may comprise unsaturations and / or heteroatoms;
- B is a reactive function of the same nature as B or B '; n> 1, preferably 1 ⁇ n ⁇ 100
- R 2 is a substituted or unsubstituted hydrocarbon radical, of the silicone type, linear or branched alkyl, aromatic, arylalkyl, alkylaryl or cycloaliphatic may include one or more unsaturations and / or one or more heteroatoms.
- A is a reactive function of the same nature as A or A ', the molar ratio 1/11 being defined as follows:
- copolyamides are described in WO0068298, incorporated by reference, in particular on page 11 lines 3 to 6.
- the reactive polymerization functions A, B, A ', B' are advantageously chosen from the group comprising the carboxylic and amine functional groups.
- R1 and / or R2 are advantageously aminated polyoxyalkylenic radicals of Jeffamine® type.
- composition besides the thermoplastic polymer and the additive A, may comprise other compounds.
- the additive A is used in combination with a compound B which is insoluble and not compatible with the thermoplastic polymer.
- compound B has a chemical structure that is compatible with at least part of the structure of compound A, in particular the part of structure which is incompatible with the thermoplastic polymer.
- compounds B which are suitable for the invention mention may be made of compounds belonging to the families of polysaccharides, polyoxyalkylene glycols and polyolefins.
- Compound B can be added separated from compound A or as a mixture with at least a portion of compound A.
- thermoplastic polymer It can also be premixed with the thermoplastic polymer.
- thermoplastic polymer granules and the additive A any method known to those skilled in the art to prepare a mixture can be used to prepare the mixture according to the invention.
- an intimate mixing of the thermoplastic polymer granules and the additive A, or a mixture of the thermoplastic polymer granules and the granules of the additive A may be carried out.
- the thermoplastic polymer may also be in the form of granules. that is coated by the additive.
- the additive A may be introduced into the thermoplastic polymer during the polymerization process, advantageously at the end of the polymerization. It is also possible to introduce the additive A into the polymer in the molten state.
- Step a) consists in preparing the mixture in the molten state, with stirring.
- Step a) is preferably carried out in an extruder, even more preferably in a twin-screw or multi-screw extruder.
- the mixture may be prepared according to a mode described above, and then introduced into the extrusion device implemented in step a).
- the mixture can be introduced in solid or liquid form, for example in the molten state.
- the mixture can also be prepared in situ in the same extrusion device as that implemented in step a).
- the stirring during step a) allows a shear of the composition and an effective mixture of the thermoplastic polymer and the additive A.
- the energy of Applied shear is determined depending on the nature of the products to be blended and the desired size of the thermoplastic polymer particles.
- the mixture before being cooled according to step b), can be extruded through a die to be shaped rod, wire, film in a conventional manner and known to those skilled in the art.
- Step b) is to cool the mixture to solidify at least the thermoplastic polymer. This cooling can be carried out conventionally using air or water.
- the step of disintegrating the thermoplastic polymer particles from the cooled mixture can be carried out according to different methods.
- a first method consists in the application of a mechanical force, such as friction, shear, torsion, necessary to cause this disintegration;
- the disintegration occurs instantaneously when the cooled mixture is introduced into a liquid such as water, for example.
- the liquid is advantageously a solvent of the additive A.
- the additive A in order to be able, for example, to reuse it.
- the thermoplastic polymer powder will comprise a smaller amount of impurities or additive A.
- thermoplastic polymer particles it may be advantageous not to remove the additive A which will remain present on the surface of the thermoplastic polymer particles, thus modifying the surface properties of these particles.
- steps b) and c) are performed simultaneously.
- the mixture can be introduced after extrusion through a die directly in a reactor comprising a solvent of the additive A and a non-solvent of the thermoplastic polymer.
- thermoplastic polymer particles are optionally isolated from the solvent / additive solution A.
- the isolation can be performed by any means for separating a solid phase in suspension from a liquid phase.
- the isolation may consist for example of filtration, decantation, centrifugation, atomization.
- the isolation can be carried out for example by atomization to recover a powder comprising elementary particles of size equivalent to those present in the dispersion and / or aggregates of particles. These aggregates are generally easily redispersible in a medium such as water or broken by applying vibrations to the powder. Other means of removing water or recovering the powder can be used such as filtration or centrifugation and then drying the filter cake.
- thermoplastic polymer particles thus obtained can be washed and dried.
- the process of the invention makes it possible to obtain particles with a controlled geometry, in particular by adjusting the stirring during step a), the nature of compounds A and / or B, the temperature and the concentration of the various components of the mixture. .
- the powder has an intra-particle porosity of less than 0.05 ml / g, preferably less than 0.02 ml / g, especially for pore sizes greater than or equal to 0.01 ⁇ m.
- the powder according to the invention has a sphericity factor of between 0.8 and 1, preferably between 0.85 and 1, more preferably between 0.9 and 1.
- the powder according to the invention advantageously has a flowability of between 30 and 60.
- the flowability of the powder can in particular be modified by adding various additives, such as, for example, silica.
- the powder according to the invention may also have a bulk density of between 500 and 700 g / l and a tapped density of between 550 and 800 g / l.
- compositions used according to the invention, as well as the articles obtained may contain one or more additives or compounds chosen from the group comprising mattifying agents, heat stabilizers, light stabilizers, pigments, dyes, reinforcing fillers, in particular abrasive fillers, nucleants, and shock reinforcing agents.
- additives or compounds chosen from the group comprising mattifying agents, heat stabilizers, light stabilizers, pigments, dyes, reinforcing fillers, in particular abrasive fillers, nucleants, and shock reinforcing agents.
- mattifying agents such as heat stabilizers, light stabilizers, pigments, dyes, reinforcing fillers, in particular abrasive fillers, nucleants, and shock reinforcing agents.
- the selective melting of layers is a method of making articles consisting of depositing layers of powdery materials, selectively melting a portion or a region of a layer, and depositing a new layer of powder and melt again some of this layer and so on so as to obtain the desired object.
- the selectivity of the portion of the layer to be melted is obtained for example by the use of absorbers, inhibitors, masks, or through the provision of focused energy, such as a laser or electromagnetic beam.
- Sintering by additivation of layers is particularly preferred, particularly rapid prototyping by sintering using a laser.
- Rapid prototyping is a process that allows to obtain parts of complex shapes without tools and without machining, from a three-dimensional image of the article to be produced, by sintering superimposed layers of powders using a laser.
- Generalities on rapid prototyping by laser sintering are mentioned in US6136948 and WO96 / 06881, US20040138363.
- the machines for carrying out these processes are composed of a construction chamber on a manufacturing piston, surrounded on the left and on the right by two pistons supplying the powder, a laser, and a means for spreading the powder, such as a roller.
- the chamber is generally kept at a constant temperature to prevent deformation.
- the powder is first spread in a uniform layer over the entire chamber, the laser then traces the 2D section on the surface of the powder, thus sintering. Caches can also be used.
- the manufacturing piston goes down the thickness of a stratum while one of the powder supply pistons rises. A new layer of powder is spread over the entire surface and the process is repeated until the piece is finished. The workpiece must then be removed carefully from the machine and cleaned of the unsintered powder surrounding it. There are other machines where the powder does not come from below thanks to the piston, but from the top. This method saves time because it is not necessary to stop the manufacture of parts to replenish the powder machine.
- Polymer P PA 6 TechnylStar® marketed by Rhodia of relative viscosity 2.14 in sulfuric acid.
- - Additive A Pluronic F108 marketed by BASF
- Compound B masterbatch of the polymer P with 0.5% by weight of UO2 marketed by BASF (grade PC1 N).
- the compound B is introduced into a Prism type 24D twin screw extruder, sold by Thermo Electron Corporation, using a volumetric feed and the additive A in the form of pellets using a feed. weight.
- the flow rates of the two feeders are set to have a concentration of additive A of 30% by weight.
- the mixture is extruded at a fixed rate of 8 kg / h.
- the temperatures of the various ranges of the extruder are between 219 and 245 ° C.
- the speed is set at 390 rpm.
- the rods obtained are dispersed in water by a powerful mechanical stirring: the solution is dispersed in a stirred tank (use of a colloid mill marketed by Fryma). The aqueous solution is then decanted with pumping of the foam and the supernatant and is then filtered on a vacuum flat filter to remove the additive A and the solid impurities. A thermal stabilizer is added to the washed rushes. The slurry is then spray dried.
- the atomizers used are Niro Major for Example 1 and APV Anhydro for Example 2, marketed by the company Niro and APV, respectively. 0.1% by weight of T365 silica, from Rhodia, is added to promote flowability. Sieving with a 100 micron sieve is carried out. The particle size distribution is measured using a device called MasterSizer 2000 marketed by Malvern Instruments. This distribution, expressed in volume, obtained after application of ultrasound, is unimodal and centered on a particle diameter of 50 microns.
- Example 2 Manufacture of an article by laser sintering
- the particles of Example 1 are then sintered on a laser prototyping type machine marketed by EOS, Model 360.
- the particles are placed in two bins adjacent to the work surface. and heated to a temperature of 160 ° C.
- the particles are brought to the working surface by means of a 100-150 micron layer roll.
- the work surface is heated to a temperature between 195 and 200 ° C.
- a laser of a Powerful 25W provides the additional energy needed for particle sintering.
- test pieces were made without difficulty according to this method of manufacture.
- the measured density is between 1.19 and 1.137.
- the theoretical density is 1, 143.
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Abstract
Description
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Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI0916479-0A BRPI0916479B1 (pt) | 2008-12-01 | 2009-12-01 | processo de fabricação de artigo moldado |
| EP09760890.5A EP2352636B1 (fr) | 2008-12-01 | 2009-12-01 | Realisation d'article par fusion selective de couches de poudre de polymere |
| ES09760890.5T ES2681200T3 (es) | 2008-12-01 | 2009-12-01 | Producción de artículo por fusión selectiva de capas de polvo de polímero |
| US13/132,212 US9132588B2 (en) | 2008-12-01 | 2009-12-01 | Producing an item by the selective fusion of polymer powder layers |
| CN200980148389.1A CN102232018B (zh) | 2008-12-01 | 2009-12-01 | 通过聚合物粉末层的选择性熔融生产制品 |
| KR1020117012619A KR101382868B1 (ko) | 2008-12-01 | 2009-12-01 | 중합체 분말층의 선택적 융합에 의한 물품의 제조 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR08/06730 | 2008-12-01 | ||
| FR0806730A FR2939075B1 (fr) | 2008-12-01 | 2008-12-01 | Realisation d'article par fusion selective de couches de poudre de polymere |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2010063691A2 true WO2010063691A2 (fr) | 2010-06-10 |
| WO2010063691A3 WO2010063691A3 (fr) | 2010-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2009/066103 Ceased WO2010063691A2 (fr) | 2008-12-01 | 2009-12-01 | Realisation d'article par fusion selective de couches de poudre de polymere |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US9132588B2 (fr) |
| EP (1) | EP2352636B1 (fr) |
| KR (1) | KR101382868B1 (fr) |
| CN (1) | CN102232018B (fr) |
| BR (1) | BRPI0916479B1 (fr) |
| ES (1) | ES2681200T3 (fr) |
| FR (1) | FR2939075B1 (fr) |
| WO (1) | WO2010063691A2 (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012076528A1 (fr) | 2010-12-10 | 2012-06-14 | Rhodia Operations | Realisation d'article par fusion selective de couches de poudre de polymere |
| KR101538813B1 (ko) * | 2007-06-20 | 2015-07-22 | 바스프 에스이 | 폴리아미드의 제조 방법 |
| US9512285B2 (en) | 2012-06-12 | 2016-12-06 | Rhodia Operations | Method for heat-treating powders |
| EP2352636B1 (fr) | 2008-12-01 | 2018-05-30 | Rhodia Opérations | Realisation d'article par fusion selective de couches de poudre de polymere |
| US11426931B2 (en) | 2018-06-19 | 2022-08-30 | Hewlett-Packard Development Company, L.P. | Three-dimensional printing |
| US11591486B2 (en) | 2018-06-19 | 2023-02-28 | Hewlett-Packard Development Company, L.P. | Three-dimensional printing |
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| AR113459A1 (es) * | 2017-10-25 | 2020-05-06 | Dow Global Technologies Llc | Proceso para formar un polvo |
| CA3079085A1 (fr) | 2017-10-25 | 2019-05-02 | Dow Global Technologies Llc | Procede de formation de poudre |
| WO2019245534A1 (fr) | 2018-06-19 | 2019-12-26 | Hewlett-Packard Development Company, L.P. | Impression en trois dimensions |
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| US12473475B2 (en) | 2021-03-05 | 2025-11-18 | Saint-Gobain Abrasives, Inc. | Abrasive articles and methods for forming same |
| EP4301552A4 (fr) | 2021-03-05 | 2025-03-05 | Saint-gobain Abrasives, Inc | Articles abrasifs et procédés de formation de tels articles |
| WO2022245721A1 (fr) * | 2021-05-17 | 2022-11-24 | JABlL INC. | Poudre de polycétone pour frittage laser |
| EP4373866A4 (fr) | 2021-07-22 | 2025-05-21 | Braskem America, Inc. | Polymères de polypropylène pour impression 3d basée sur la fusion de lit de poudre |
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| FR2907366B1 (fr) * | 2006-10-20 | 2008-12-05 | Arkema France | Procede de fabrication et de mise en forme d'une piece en polyamide aux proprietes mecaniques amaliorees, composition pour mise en oeuvre du procede. |
| FR2910368B1 (fr) | 2006-12-22 | 2012-03-09 | Rhodia Operations | Perles de polyamides et procede de fabrication de ces perles |
| FR2939075B1 (fr) | 2008-12-01 | 2010-12-17 | Rhodia Operations | Realisation d'article par fusion selective de couches de poudre de polymere |
-
2008
- 2008-12-01 FR FR0806730A patent/FR2939075B1/fr active Active
-
2009
- 2009-12-01 KR KR1020117012619A patent/KR101382868B1/ko active Active
- 2009-12-01 WO PCT/EP2009/066103 patent/WO2010063691A2/fr not_active Ceased
- 2009-12-01 CN CN200980148389.1A patent/CN102232018B/zh active Active
- 2009-12-01 EP EP09760890.5A patent/EP2352636B1/fr not_active Revoked
- 2009-12-01 ES ES09760890.5T patent/ES2681200T3/es active Active
- 2009-12-01 BR BRPI0916479-0A patent/BRPI0916479B1/pt active IP Right Grant
- 2009-12-01 US US13/132,212 patent/US9132588B2/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101538813B1 (ko) * | 2007-06-20 | 2015-07-22 | 바스프 에스이 | 폴리아미드의 제조 방법 |
| EP2352636B1 (fr) | 2008-12-01 | 2018-05-30 | Rhodia Opérations | Realisation d'article par fusion selective de couches de poudre de polymere |
| CN103249760A (zh) * | 2010-12-10 | 2013-08-14 | 罗地亚经营管理公司 | 通过选择性地熔合聚合物粉末层生产物品 |
| FR2968664A1 (fr) * | 2010-12-10 | 2012-06-15 | Rhodia Operations | Realisation d'article par fusion selective de couches de poudre de polymere |
| US9321192B2 (en) | 2010-12-10 | 2016-04-26 | Rhodia Operations | Production of an article by selective fusion of polymer powder layers |
| CN103249760B (zh) * | 2010-12-10 | 2016-11-23 | 罗地亚经营管理公司 | 通过选择性地熔合聚合物粉末层生产物品 |
| KR101739617B1 (ko) * | 2010-12-10 | 2017-05-24 | 로디아 오퍼레이션스 | 중합체 분말층의 선택적 융합에 의한 물품 제조 |
| EP2649112B1 (fr) | 2010-12-10 | 2018-03-21 | Rhodia Operations | Realisation d'article par fusion selective de couches de poudre de polymere |
| WO2012076528A1 (fr) | 2010-12-10 | 2012-06-14 | Rhodia Operations | Realisation d'article par fusion selective de couches de poudre de polymere |
| US9512285B2 (en) | 2012-06-12 | 2016-12-06 | Rhodia Operations | Method for heat-treating powders |
| US11426931B2 (en) | 2018-06-19 | 2022-08-30 | Hewlett-Packard Development Company, L.P. | Three-dimensional printing |
| US11591486B2 (en) | 2018-06-19 | 2023-02-28 | Hewlett-Packard Development Company, L.P. | Three-dimensional printing |
| US11628619B2 (en) | 2018-06-19 | 2023-04-18 | Hewlett-Packard Development Company, L.P. | Three-dimensional printing |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010063691A3 (fr) | 2010-09-23 |
| BRPI0916479B1 (pt) | 2020-12-22 |
| US20110293918A1 (en) | 2011-12-01 |
| EP2352636A2 (fr) | 2011-08-10 |
| CN102232018B (zh) | 2016-08-03 |
| EP2352636B1 (fr) | 2018-05-30 |
| FR2939075B1 (fr) | 2010-12-17 |
| ES2681200T3 (es) | 2018-09-12 |
| US9132588B2 (en) | 2015-09-15 |
| BRPI0916479A2 (pt) | 2020-06-16 |
| KR20110099234A (ko) | 2011-09-07 |
| FR2939075A1 (fr) | 2010-06-04 |
| CN102232018A (zh) | 2011-11-02 |
| KR101382868B1 (ko) | 2014-04-08 |
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