FR3125245A1 - Process for manufacturing a component from granules of thermoplastic material - Google Patents
Process for manufacturing a component from granules of thermoplastic material Download PDFInfo
- Publication number
- FR3125245A1 FR3125245A1 FR2107653A FR2107653A FR3125245A1 FR 3125245 A1 FR3125245 A1 FR 3125245A1 FR 2107653 A FR2107653 A FR 2107653A FR 2107653 A FR2107653 A FR 2107653A FR 3125245 A1 FR3125245 A1 FR 3125245A1
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- Prior art keywords
- acoustic
- thermoplastic material
- complex
- granules
- component
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- 239000012815 thermoplastic material Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000008187 granular material Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 230000009477 glass transition Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000005192 partition Methods 0.000 claims description 5
- 239000008188 pellet Substances 0.000 claims 3
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 6
- 238000003856 thermoforming Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- VAOCPAMSLUNLGC-UHFFFAOYSA-N metronidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1CCO VAOCPAMSLUNLGC-UHFFFAOYSA-N 0.000 description 1
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
- B29C2043/046—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds travelling between different stations, e.g. feeding, moulding, curing stations
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
- B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
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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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/251—Particles, powder or granules
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0001—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties
- B29K2995/0002—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3076—Aircrafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/772—Articles characterised by their shape and not otherwise provided for
- B29L2031/7724—Conical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Procédé de fabrication d’un composant à partir de granulés en matériau thermoplastique Un procédé de fabrication d’un composant (120) comprenant une pluralité d’éléments complexes creux (121), le procédé comprenant : - le placement de granulés en matériau thermoplastique dans des cavités de moulage (211) d’un moule (210) d’un outillage de mise en forme (200), les cavités de moulage présentant une forme correspondant à la forme des éléments complexes (121) du composant (120) à fabriquer, - la mise en forme des granulés en matériau thermoplastique dans l’outillage de mise en forme, au moins le moule (210) étant maintenu à une température supérieure à la température de transition vitreuse du matériau thermoplastique, - refroidissement du moule, - démoulage d’un panneau multiéléments complexes (120) comprenant une pluralité d’éléments complexes creux (121). Figure pour l’abrégé : Fig. 4.Method of manufacturing a component from granules of thermoplastic material A method of manufacturing a component (120) comprising a plurality of hollow complex elements (121), the method comprising: - placing granules of thermoplastic material in molding cavities (211) of a mold (210) of a shaping tool (200), the molding cavities having a shape corresponding to the shape of the complex elements (121) of the component (120) to be manufactured , - the shaping of the granules of thermoplastic material in the shaping tool, at least the mold (210) being maintained at a temperature above the glass transition temperature of the thermoplastic material, - cooling of the mold, - demolding of a complex multi-element panel (120) comprising a plurality of hollow complex elements (121). Figure for abstract: Fig. 4.
Description
La présente invention se rapporte au domaine général des structures ou panneaux comprenant une pluralité d’éléments complexes creux ayant chacune une forme se rétrécissant progressivement entre une base et un sommet. Elle concerne plus particulièrement mais non exclusivement les structures d'atténuation acoustiques utilisées pour réduire les bruits produits dans les moteurs d’avion comme dans les turbines à gaz ou échappement de ceux-ci.The present invention relates to the general field of structures or panels comprising a plurality of hollow complex elements each having a shape that gradually tapers between a base and a top. It relates more particularly but not exclusively to acoustic attenuation structures used to reduce the noise produced in aircraft engines such as in gas turbines or their exhaust.
Les structures d’atténuation acoustique sont typiquement constituées d'une plaque ou peau de surface acoustique perméable aux ondes acoustiques que l'on souhaite atténuer et d'une plaque ou peau pleine réfléchissante dite « plaque de fermeture », un corps cellulaire, tel qu'un nid d'abeille ou une structure poreuse, étant disposé entre ces deux parois. De façon bien connue, de tels panneaux forment des résonateurs de type Helmholtz qui permettent d'atténuer dans une certaine gamme de fréquences les ondes acoustiques. Des structures d’atténuation acoustique de ce type sont notamment décrites dans les documents US 5 912 442 et GB 2 314 526.Acoustic attenuation structures typically consist of an acoustic surface plate or skin permeable to the acoustic waves that it is desired to attenuate and of a full reflective plate or skin called the "closing plate", a cellular body, such as a honeycomb or a porous structure, being disposed between these two walls. In a well-known manner, such panels form resonators of the Helmholtz type which make it possible to attenuate the acoustic waves in a certain range of frequencies. Acoustic attenuation structures of this type are described in particular in documents US 5,912,442 and GB 2,314,526.
Ces structures d’atténuation acoustique sont limitées à des formes de cellules simples telle que celles des alvéoles d’une structure classique de type NIDA®. En conséquence, les performances acoustiques obtenues sont limitées à l’absorption d’une gamme de fréquences très étroite.These acoustic attenuation structures are limited to the shapes of simple cells such as those of the cells of a classic structure of the NIDA® type. Consequently, the acoustic performances obtained are limited to the absorption of a very narrow range of frequencies.
Une solution pour augmenter la gamme de fréquence d’atténuation acoustique est de superposer deux corps cellulaires ayant des formes et des dimensions de cellules différentes. Cette solution présente l’inconvénient d’augmenter significativement l’encombrement de la structure d’atténuation acoustique.A solution to increase the acoustic attenuation frequency range is to superimpose two cell bodies with different cell shapes and sizes. This solution has the disadvantage of significantly increasing the size of the acoustic attenuation structure.
Une autre solution connue consiste à placer des troncs de cône ouverts dans des alvéoles comme décrits dans le document FR 3 082 987. Si cette solution permet de réduire l’encombrement de la structure d’atténuation acoustique, la masse de la structure reste cependant importante et, par conséquent, pénalisante pour des utilisations dans des aéronefs où la maîtrise de la masse globale est toujours recherchée.Another known solution consists in placing open truncated cones in cells as described in document FR 3 082 987. If this solution makes it possible to reduce the size of the acoustic attenuation structure, the mass of the structure nevertheless remains significant. and, consequently, penalizing for uses in aircraft where control of the overall mass is always sought.
La présente invention a donc pour but principal de proposer une solution pour des structures ou panneaux comprenant une pluralité d’éléments complexes creux qui ne présentent pas les inconvénients précités.The main purpose of the present invention is therefore to propose a solution for structures or panels comprising a plurality of hollow complex elements which do not have the aforementioned drawbacks.
Conformément à l’invention, ce but est atteint grâce à un procédé de fabrication d’un composant comprenant une pluralité d’éléments complexes creux ayant chacune une forme se rétrécissant progressivement entre une base et un sommet, les éléments complexes creux étant reliés les uns aux autres par un ou plusieurs bords adjacents, le procédé comprenant :
- le placement de granulés en matériau thermoplastique dans des cavités de moulage d’un moule d’un outillage de mise en forme, les cavités de moulage présentant une forme correspondant à la forme des éléments complexes du composant à fabriquer,
- la mise en forme des granulés en matériau thermoplastique dans l’outillage de mise en forme, au moins le moule étant maintenu à une température supérieure à la température de transition vitreuse ou de fusion du matériau thermoplastique,
- le refroidissement du moule à une température inférieure à la température de transition vitreuse du matériau thermoplastique,
- démoulage d’un panneau multiéléments complexes comprenant une pluralité d’éléments complexes creux.According to the invention, this object is achieved by means of a method of manufacturing a component comprising a plurality of hollow complex elements each having a shape that gradually tapers between a base and a top, the hollow complex elements being connected to each other to others by one or more adjacent edges, the method comprising:
- the placement of granules of thermoplastic material in the molding cavities of a mold of a shaping tool, the molding cavities having a shape corresponding to the shape of the complex elements of the component to be manufactured,
- the shaping of the granules of thermoplastic material in the shaping tool, at least the mold being maintained at a temperature above the glass transition or melting temperature of the thermoplastic material,
- the cooling of the mold to a temperature below the glass transition temperature of the thermoplastic material,
- demoulding of a complex multi-element panel comprising a plurality of hollow complex elements.
En utilisant des granulés en matériau thermoplastique qui ont un faible coût d’approvisionnement, le procédé de l’invention permet d’obtenir de façon économique, fiable et répétable des composants équipés d’éléments de forme complexes avec une épaisseur de paroi très faible typiquement inférieure à 1mm. Le composant ainsi obtenu permet la fabrication de structures, par exemple des structure d’atténuation acoustiques, plus minces donc plus légères tout en respectant les spécifications requises en matière d’encombrement, performances mécaniques et de masse.By using granules made of thermoplastic material which have a low supply cost, the method of the invention makes it possible to obtain, in an economical, reliable and repeatable manner, components equipped with complex shaped elements with a typically very low wall thickness. less than 1mm. The component thus obtained allows the manufacture of structures, for example acoustic attenuation structures, which are thinner and therefore lighter while respecting the required specifications in terms of size, mechanical performance and mass.
Par ailleurs, lors de l’étape de mise en forme, le moule est maintenu à une température supérieure à la température de transition vitreuse ou de fusion du matériau thermoplastique. Comme expliqué ci-après en détails, cela permet de faciliter la formation d’éléments complexes creux avec des parois de très faibles épaisseurs.Furthermore, during the shaping step, the mold is maintained at a temperature above the glass transition or melting temperature of the thermoplastic material. As explained below in detail, this facilitates the formation of complex hollow elements with very thin walls.
Selon un premier aspect particulier du procédé de l’invention, celui-ci comprend une étape de préchauffage des granulés en matériau thermoplastique à une température inférieure à la température de transition vitreuse du matériau thermoplastique, l’étape de préchauffage étant réalisée avant l’étape de placement des granulés en matériau thermoplastique dans des cavités de moulage ou avant l’étape de mise en forme des granulés en matériau thermoplastique. Cette étape de préchauffage permet de réduire le temps de chauffage des granulés dans le moule et ainsi accélérer la fabrication des composants.According to a first particular aspect of the process of the invention, the latter comprises a step of preheating the granules of thermoplastic material to a temperature below the glass transition temperature of the thermoplastic material, the preheating step being carried out before the step placing granules of thermoplastic material in molding cavities or before the step of shaping the granules of thermoplastic material. This preheating step makes it possible to reduce the heating time of the granules in the mold and thus accelerate the manufacture of the components.
Selon un deuxième aspect particulier du procédé de l’invention, l’étape de placement des granulés en matériau thermoplastique dans des cavités de moulage comprend le placement automatique d’une quantité déterminée de granulés dans chaque cavité de moulage.According to a second particular aspect of the method of the invention, the step of placing granules of thermoplastic material in molding cavities comprises the automatic placement of a determined quantity of granules in each molding cavity.
Selon un troisième aspect particulier du procédé de l’invention, la quantité de granulés en matériau thermoplastique placée dans chaque cavité de moulage est définie en fonction de l’épaisseur de paroi de chaque élément complexe à fabriquer.According to a third particular aspect of the method of the invention, the quantity of granules of thermoplastic material placed in each molding cavity is defined according to the wall thickness of each complex element to be manufactured.
Selon un quatrième aspect particulier du procédé de l’invention, les granulés sont en un matériau thermoplastique chargé.According to a fourth particular aspect of the method of the invention, the granules are made of a filled thermoplastic material.
Selon un cinquième aspect particulier du procédé de l’invention, les cavités de moulage présentent une forme pyramidale, conique, en spirale, en entonnoir ou en trémie.According to a fifth particular aspect of the method of the invention, the molding cavities have a pyramidal, conical, spiral, funnel or hopper shape.
Selon un sixième aspect particulier du procédé de l’invention, les éléments complexes du composant ont une épaisseur de paroi inférieure à 1mm.According to a sixth particular aspect of the method of the invention, the complex elements of the component have a wall thickness of less than 1 mm.
L’invention a également pour objet un procédé de fabrication d’une structure d’atténuation acoustique comprenant les étapes suivantes :The invention also relates to a method for manufacturing an acoustic attenuation structure comprising the following steps:
- réalisation d’un composant acoustique selon le procédé de fabrication d’un composant acoustique de l’invention,- production of an acoustic component according to the method of manufacturing an acoustic component of the invention,
- réalisation d’un panneau multiéléments acoustiques complexes comprenant le composant acoustique et une pluralité de cloisons formant des cavités acoustiques, chaque élément acoustique complexe du composant acoustique étant logé dans une cavité acoustique de manière à former une cellule acoustique,
- assemblage d’une face du panneau multiéléments acoustiques complexes avec une face d’assemblage d’une peau acoustique.- production of a complex acoustic multi-element panel comprising the acoustic component and a plurality of partitions forming acoustic cavities, each complex acoustic element of the acoustic component being housed in an acoustic cavity so as to form an acoustic cell,
- assembly of one face of the complex acoustic phased array panel with an assembly face of an acoustic skin.
Les éléments acoustiques complexes creux du composant acoustique peuvent être avantageusement associés avec des cloisons pour augmenter la hauteur projetée des cellules formées. Il est ainsi possible de réaliser des structures d’atténuation acoustique aptes à atténuer des ondes sonores à plus basses fréquences et, par conséquent, sur des gammes de fréquences plus étendues tout en présentant un encombrement réduit.The hollow complex acoustic elements of the acoustic component can advantageously be combined with partitions to increase the projected height of the cells formed. It is thus possible to produce acoustic attenuation structures capable of attenuating sound waves at lower frequencies and, consequently, over wider frequency ranges while having a reduced bulk.
Selon un aspect particulier du procédé de fabrication d’une structure d’atténuation acoustique, la structure d’atténuation acoustique comprend en outre une peau de fermeture recouvrant la face horizontale du panneau multiéléments acoustiques complexes opposée à la face horizontale recouverte par la peau acoustique, le procédé comprenant l’assemblage de la pièce réunissant le panneau multiéléments acoustiques complexes et la pluralité de cloisons avec la peau de fermeture.According to a particular aspect of the method for manufacturing an acoustic attenuation structure, the acoustic attenuation structure further comprises a closure skin covering the horizontal face of the complex acoustic multi-element panel opposite the horizontal face covered by the acoustic skin, the method comprising assembling the part joining the complex acoustic multi-element panel and the plurality of partitions with the closing skin.
Claims (9)
- le placement de granulés en matériau thermoplastique (10) dans des cavités de moulage (211) d’un moule (210) d’un outillage de mise en forme (200), les cavités de moulage présentant une forme correspondant à la forme des éléments complexes (121) du composant (120) à fabriquer,
- la mise en forme des granulés en matériau thermoplastique (10) dans l’outillage de mise en forme, au moins le moule (210) étant maintenu à une température supérieure à la température de transition vitreuse du matériau thermoplastique,
- le refroidissement du moule (210) à une température inférieure à la température de transition vitreuse du matériau thermoplastique,
- démoulage d’un panneau multiéléments complexes (120) comprenant une pluralité d’éléments complexes creux (121).A method of manufacturing a component (120) comprising a plurality of complex hollow elements (121) each having a tapering shape between a base (122) and an apex (123), the complex hollow elements being bonded together others by one or more adjacent edges, the method comprising:
- placing granules of thermoplastic material (10) in molding cavities (211) of a mold (210) of shaping tooling (200), the molding cavities having a shape corresponding to the shape of the complex elements (121) of the component (120) to be manufactured,
- the shaping of the granules of thermoplastic material (10) in the shaping tool, at least the mold (210) being maintained at a temperature above the glass transition temperature of the thermoplastic material,
- the cooling of the mold (210) to a temperature below the glass transition temperature of the thermoplastic material,
- demoulding of a complex multi-element panel (120) comprising a plurality of hollow complex elements (121).
- réalisation d’un composant acoustique (120) selon le procédé tel que défini dans l’une quelconque des revendications 1 à 7,
- réalisation d’un panneau multiéléments acoustiques complexes comprenant le composant acoustique et une pluralité de cloisons (131) formant des cavités acoustiques (132), chaque élément acoustique complexe creux (121) du composant acoustique (120) étant logé dans une cavité acoustique de manière à former une cellule acoustique (150),
- assemblage d’une face (122a) du panneau multiéléments acoustiques complexes (120) avec une face d’assemblage (112) d’une peau acoustique (110).Method of manufacturing an acoustic attenuation structure (100) comprising the following steps:
- production of an acoustic component (120) according to the method as defined in any one of claims 1 to 7,
- production of a complex acoustic multi-element panel comprising the acoustic component and a plurality of partitions (131) forming acoustic cavities (132), each hollow complex acoustic element (121) of the acoustic component (120) being housed in an acoustic cavity of so as to form an acoustic cell (150),
- Assembly of a face (122a) of the complex acoustic multi-element panel (120) with an assembly face (112) of an acoustic skin (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2107653A FR3125245B1 (en) | 2021-07-15 | 2021-07-15 | Process for manufacturing a component from granules of thermoplastic material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2107653 | 2021-07-15 | ||
| FR2107653A FR3125245B1 (en) | 2021-07-15 | 2021-07-15 | Process for manufacturing a component from granules of thermoplastic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR3125245A1 true FR3125245A1 (en) | 2023-01-20 |
| FR3125245B1 FR3125245B1 (en) | 2023-12-29 |
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ID=77317159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR2107653A Active FR3125245B1 (en) | 2021-07-15 | 2021-07-15 | Process for manufacturing a component from granules of thermoplastic material |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR3125245B1 (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323531A (en) * | 1971-03-01 | 1982-04-06 | The Dow Chemical Company | Process for forming a plastic article |
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| DE19630852A1 (en) * | 1996-07-31 | 1998-02-05 | Mann & Hummel Filter | Filters with an open-pore element made of sintered material |
| US5912442A (en) | 1997-07-02 | 1999-06-15 | Trw Inc. | Structure having low acoustically-induced vibration response |
| US6060008A (en) * | 1995-11-21 | 2000-05-09 | Frimatec Ingenieurgesellschaft Mbh | Process for producing friction linings |
| RU2247878C2 (en) * | 2003-01-05 | 2005-03-10 | Федеральное государственное унитарное предприятие "Пермский завод "Машиностроитель" (ФГУП ПЗМаш) | Method for manufacture of sound-proofing construction for gas tract |
| WO2011017188A1 (en) * | 2009-08-07 | 2011-02-10 | Griffin Thermoplastics, Llc | Reinforced injection molded thermoplastic cellular core |
| US20150027629A1 (en) * | 2013-07-29 | 2015-01-29 | The Boeing Company | Septumization of Honeycomb Sandwiches |
| FR3082987A1 (en) | 2018-06-25 | 2019-12-27 | Airbus Operations | STRUCTURE CONSTITUTING AN ACOUSTIC INSULATOR |
| US20200143786A1 (en) * | 2018-11-07 | 2020-05-07 | Airbus Operations Sas | Assembly forming an acoustic insulator |
| US11059559B2 (en) * | 2018-03-05 | 2021-07-13 | General Electric Company | Acoustic liners with oblique cellular structures |
-
2021
- 2021-07-15 FR FR2107653A patent/FR3125245B1/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323531A (en) * | 1971-03-01 | 1982-04-06 | The Dow Chemical Company | Process for forming a plastic article |
| JPH04298233A (en) * | 1990-12-11 | 1992-10-22 | Kuraray Chem Corp | Honeycomb adsorbent molding |
| US6060008A (en) * | 1995-11-21 | 2000-05-09 | Frimatec Ingenieurgesellschaft Mbh | Process for producing friction linings |
| GB2314526A (en) | 1996-06-28 | 1998-01-07 | Short Brothers Plc | A noise attenuation panel |
| DE19630852A1 (en) * | 1996-07-31 | 1998-02-05 | Mann & Hummel Filter | Filters with an open-pore element made of sintered material |
| US5912442A (en) | 1997-07-02 | 1999-06-15 | Trw Inc. | Structure having low acoustically-induced vibration response |
| RU2247878C2 (en) * | 2003-01-05 | 2005-03-10 | Федеральное государственное унитарное предприятие "Пермский завод "Машиностроитель" (ФГУП ПЗМаш) | Method for manufacture of sound-proofing construction for gas tract |
| WO2011017188A1 (en) * | 2009-08-07 | 2011-02-10 | Griffin Thermoplastics, Llc | Reinforced injection molded thermoplastic cellular core |
| US20150027629A1 (en) * | 2013-07-29 | 2015-01-29 | The Boeing Company | Septumization of Honeycomb Sandwiches |
| US11059559B2 (en) * | 2018-03-05 | 2021-07-13 | General Electric Company | Acoustic liners with oblique cellular structures |
| FR3082987A1 (en) | 2018-06-25 | 2019-12-27 | Airbus Operations | STRUCTURE CONSTITUTING AN ACOUSTIC INSULATOR |
| US20200143786A1 (en) * | 2018-11-07 | 2020-05-07 | Airbus Operations Sas | Assembly forming an acoustic insulator |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3125245B1 (en) | 2023-12-29 |
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